TY - JOUR
TI - MuLiMs-MCoMPAs: A Novel Multiplatform Framework to Compute Tensor Algebra-Based Three-Dimensional Protein Descriptors
AU - Contreras-Torres, Ernesto
AU - Marrero-Ponce, Yovani
AU - Terán, Julio E.
AU - García-Jacas, César R.
AU - Brizuela, Carlos A.
AU - Sánchez-Rodríguez, Juan Carlos
T2 - Journal of Chemical Information and Modeling
AB - This report introduces the MuLiMs-MCoMPAs software (acronym for Multi-Linear Maps based on N-Metric and Contact Matrices of 3D Protein and Amino-acid weightings), designed to compute tensor-based 3D protein structural descriptors by applying two- and three-linear algebraic forms. Moreover, these descriptors contemplate generalizing components such as novel 3D protein structural representations, (dis)similarity metrics, and multimetrics to extract geometrical related information between two and three amino acids, weighting schemes based on amino acid properties, matrix normalization procedures that consider simple-stochastic and mutual probability transformations, topological and geometrical cutoffs, amino acid, and group-based MD calculations, and aggregation operators for merging amino acidic and group MDs. The MuLiMs-MCoMPAs software, which belongs to the ToMoCoMD-CAMPS suite, was developed in Java (version 1.8) using the Chemistry Development Kit (CDK) (version 1.4.19) and the Jmol libraries. This software implemented a divide-and-conquer strategy to parallelize the computation of the indices as well as modules for data preprocessing and batch computing functionalities. Furthermore, it consists of two components: (i) a desktop-graphical user interface (GUI) and (ii) an API library. The relevance of this novel approach is demonstrated through two analyses that considered Shannon’s entropy-based variability and a principal component analysis. These studies showed that the MuLiMs-MCoMPAs’ three-linear descriptor family contains higher informational entropy than several other descriptors generated with available computation tools. Moreover, the MuLiMs-MCoMPAs indices capture additional orthogonal information to the one codified by the available calculation approaches. As a result, two sets of suggested theoretical configurations that contain 13648 two-linear indices and 20263 three-linear indices are available for download at tomocomd.com. Furthermore, as a demonstration of the applicability and easy integration of the MuLiMs library into a QSAR-based expert system, a software application (ProStAF) was generated to predict SCOP protein structural classes and folding rate. It can thus be anticipated that the MuLiMs-MCoMPAs framework will turn into a valuable contribution to the chem- and bioinformatics research fields.
DA - 2019/10/30/
PY - 2019/10/30/
DO - 10.1021/acs.jcim.9b00629
VL - 60
IS - 2
SP - 1042-1059
J2 - J. Chem. Inf. Model.
LA - en
OP -
SN - 1549-9596 1549-960X
UR - http://dx.doi.org/10.1021/acs.jcim.9b00629
DB - Crossref
ER -
TY - CONF
TI - Incorporating wireless data acquisition into the STEM Curriculum: A case study with Lean Six Sigma
AU - Jasper, W.J.
T2 - 2019 ASEE Southeastern Section Conference
C2 - 2019///
C3 - 2019 ASEE Southeastern Section Conference
CY - Raleigh, NC
DA - 2019///
PY - 2019///
ER -
TY - JOUR
TI - Three-dimensional biplane spectroscopic single-molecule localization microscopy: erratum
AU - Song, Ki-Hee
AU - Zhang, Yang
AU - Wang, Gaoxiang
AU - Sun, Cheng
AU - Zhang, Hao F.
T2 - Optica
DA - 2019/10/20/
PY - 2019/10/20/
DO - 10.1364/OPTICA.6.001374
UR - https://doi.org/10.1364/OPTICA.6.001374
ER -
TY - JOUR
TI - Three-dimensional biplane spectroscopic single-molecule localization microscopy
AU - Song, Ki-Hee
AU - Zhang, Yang
AU - Wang, Gaoxiang
AU - Sun, Cheng
AU - Zhang, Hao F.
T2 - Optica
AB - Spectroscopic single-molecule localization microscopy (sSMLM) captures the full emission spectra of individual molecules while simultaneously localizing their spatial locations at a precision greatly exceeding the optical diffraction limit. To achieve this, sSMLM uses a dispersive optical component to separate the emitted photons into dedicated spatial and spectral imaging channels for simultaneous acquisition. While adding a cylindrical lens in the spatial imaging channel enabled three-dimensional (3D) imaging in sSMLM, the inherent astigmatism leads to technical hurdles in spectral calibration and nonuniform lateral resolution at different depths. We found that implementing the biplane method based on the already established spatial and spectral imaging channels offers a much more attractive solution for 3D sSMLM. It allows for more efficient use of the limited photon budget and provides homogeneous lateral resolution compared with the astigmatism-based method using a cylindrical lens. Here we report 3D biplane sSMLM and demonstrate its multi-color 3D imaging capability by imaging microtubules and mitochondria in fixed COS-7 cells immunostained with Alexa Fluor 647 and CF 660C dyes, respectively. We showed a lateral localization precision of 20 nm at an average photon count of 550, a spectral precision of 4 nm at an average photon count of 1250, and an axial localization resolution of 50 nm.
DA - 2019/6/20/
PY - 2019/6/20/
DO - 10.1364/OPTICA.6.000709
UR - https://doi.org/10.1364/OPTICA.6.000709
ER -
TY - JOUR
TI - Multicolor super-resolution imaging using spectroscopic single-molecule localization microscopy with optimal spectral dispersion
AU - Zhang, Yang
AU - Song, Ki-Hee
AU - Dong, Biqin
AU - Davis, Janel L.
AU - Shao, Guangbin
AU - Sun, Cheng
AU - Zhang, Hao F.
T2 - Applied Optics
AB - We developed transmission diffraction grating-based spectroscopic single-molecule localization microscopy (sSMLM) to collect the spatial and spectral information of single-molecule blinking events concurrently. We characterized the spectral heterogeneities of multiple far-red emitting dyes in a high-throughput manner using sSMLM. We also investigated the influence of spectral dispersion on the single-molecule identification performance of fluorophores with large spectral overlapping. The careful tuning of spectral dispersion in grating-based sSMLM permitted simultaneous three-color super-resolution imaging in fixed cells with a single objective lens at a relatively low photon budget. Our sSMLM has a compact optical design and can be integrated with conventional localization microscopy to provide add-on spectroscopic analysis capability.
DA - 2019/3/20/
PY - 2019/3/20/
DO - 10.1364/AO.58.002248
UR - https://doi.org/10.1364/AO.58.002248
ER -
TY - JOUR
TI - Machine-learning based spectral classification for spectroscopic single-molecule localization microscopy
AU - Zhang, Zheyuan
AU - Zhang, Yang
AU - Ying, Leslie
AU - Sun, Cheng
AU - Zhang, Hao F.
T2 - Optics Letters
AB - Spectroscopic single-molecule localization microscopy (sSMLM) simultaneously captures the spatial locations and emission spectra of single molecular emissions and enables simultaneous multicolor super-resolution imaging. Existing sSMLM relies on extracting spectral signatures, such as weighted spectral centroids, to distinguish different molecular labels. However, the rich information carried by the complete spectral profiles is not fully utilized; thus, the misclassification rate between molecular labels can be high at low spectral analysis photon budget. We developed a machine learning (ML)-based method to analyze the full spectral profiles of each molecular emission and reduce the misclassification rate. We experimentally validated our method by imaging immunofluorescently labeled COS-7 cells using two far-red dyes typically used in sSMLM (AF647 and CF660) to resolve mitochondria and microtubules, respectively. We showed that the ML method achieved 10-fold reduction in misclassification and two-fold improvement in spectral data utilization comparing with the existing spectral centroid method.
DA - 2019/12/1/
PY - 2019/12/1/
DO - 10.1364/OL.44.005864
UR - https://doi.org/10.1364/OL.44.005864
ER -
TY - JOUR
TI - High-Throughput Single-Molecule Spectroscopy Resolves the Conformational Isomers of BODIPY Chromophores
AU - Sansalone, Lorenzo
AU - Zhang, Yang
AU - Mazza, Mercedes M. A.
AU - Davis, Janel L.
AU - Song, Ki-Hee
AU - Captain, Burjor
AU - Zhang, Hao F.
AU - Raymo, Françisco M.
T2 - The Journal of Physical Chemistry Letters
AB - A borondipyrromethene (BODIPY) chromophore is connected to a benzoxazole, benzothiazole, or nitrobenzothiazole heterocycle through an olefinic bridge with trans configuration. Rotation about the two [C–C] bonds flanking the olefinic bridge occurs with fast kinetics in solution, leading to the equilibration of four conformational isomers for each compound. Ensemble spectroscopic measurements in solutions fail to distinguish the coexisting isomers. They reveal instead averaged absorption and emission bands with dependence of the latter on the excitation wavelength. Using high-throughput single-molecule spectroscopy, two main populations of single molecules with distinct spectral centroids are observed for each compound on glass substrates. Computational analyses suggest the two populations of molecules to be conformational isomers with antiperiplanar and periplanar arrangements of the BODIPY chromophores about its [C–C] bond to the olefinic bridge. Thus, statistical analysis of multiple single-molecule emission spectra can discriminate stereoisomers that would otherwise be impossible to distinguish by ensemble measurements alone.
DA - 2019/11/7/
PY - 2019/11/7/
DO - 10.1021/acs.jpclett.9b02250
VL - 10
IS - 21
SP - 6807-6812
UR - https://doi.org/10.1021/acs.jpclett.9b02250
ER -
TY - CONF
TI - Synthesis and characterization of new benzoxazines polymers and their applications
AU - Eletmany, Mohamed R.
AU - Hassan, Entesar A.
AU - Fandy, Ragab F.
AU - Aly, Kamal I.
T2 - 5th Young Researchers of Egyptian Universities Conference (YREUC-5)
C2 - 2019/3/26/
C3 - 5th Young Researchers of Egyptian Universities Conference (YREUC-5)
CY - South Valley University, Qena, Egypt
DA - 2019/3/26/
PY - 2019/3/26/
ER -
TY - CONF
TI - Synthesis and characterization of Novel 2-substituted 1,3-benzoxazines monomers and studies their Polymerization
AU - Eletmany, Mohamed R.
AU - Hassan, Entesar A.
AU - Fandy, Ragab F.
AU - Aly, Kamal I.
T2 - 14th International Conference on Chemistry and its Role in Development (ICCRD-2019)
C2 - 2019///
C3 - 14th International Conference on Chemistry and its Role in Development (ICCRD-2019)
CY - Mansoura University, Hurghada, Egypt
DA - 2019///
PY - 2019/3/27/
ER -
TY - CONF
TI - Synthesis and Characterization of Some New Benzoxazine Polymers with Their Industrial Applications
AU - Eletmany, Mohamed R.
AU - Hassan, Entesar A.
AU - Fandy, Ragab F.
AU - Aly, Kamal I.
T2 - 3rd Annual Conference of the Faculty of Science
C2 - 2019/4/16/
C3 - 3rd Annual Conference of the Faculty of Science
CY - Faculty of Science, South Valley University, Qena, Egypt
DA - 2019/4/16/
PY - 2019/4/16/
ER -
TY - CONF
TI - Development of New Organic Hole Transport Compounds for high Performances Organic Solar cells
AU - Eletmany, Mohamed R.
T2 - 3rd International Conference on Natural Resources and Renewable Energy (ICNRRE)
C2 - 2019///
C3 - 3rd International Conference on Natural Resources and Renewable Energy (ICNRRE)
CY - South Valley University, Hurghada, Egypt
DA - 2019///
PY - 2019/7/22/
ER -
TY - JOUR
TI - Transient heat loss analysis of fabrics using a dynamic sweating guarded hot plate protocol
AU - Oswald, Courtney
AU - DenHartog, Emiel
T2 - Textile Research Journal
AB - Moisture management is important for the human comfort of clothing, especially while perspiring. Ideally, the fabric chosen for a garment enables moisture to migrate away from the skin surface, facilitating the liquid to be evaporated into the surrounding environment, which causes a cooling sensation for the wearer. This process is influenced by factors such as fiber type, fabric construction, and fabric treatments, all of which impact the resulting wicking and moisture management properties of the fabric. This research explored the heat loss associated with combined water absorption, wicking, and evaporative cooling during wetting of fabrics. A dynamic sweating guarded hot plate was used to measure transitional heat loss as water was introduced at a steady rate over a 65-minute testing period. The results on a cotton and polyester blend fabric as well as a wool fabric indicated that the liquid water absorption and transport processes significantly influence heat loss properties during this transition. However, the results also show novel aspects in the efficiency of cooling associated with the wicking of sweat and different stages of wetting of fabrics leading to different cooling power. Furthermore, this method raises questions as to whether current sweating guarded hot plate technologies are an appropriate representation of human sweat production or that the scalability of sweat production per unit area is limited. This developed testing method can be successful in quantifying the differences in transitional heat loss and will enable testing of fabrics for comfort in changing conditions.
DA - 2019/11/13/
PY - 2019/11/13/
DO - 10.1177/0040517519888257
VL - 90
IS - 9-10
SP - 1130-1140
J2 - Textile Research Journal
LA - en
OP -
SN - 0040-5175 1746-7748
UR - http://dx.doi.org/10.1177/0040517519888257
DB - Crossref
KW - management of human sensory and comfort
KW - measurement
KW - performance
KW - product and systems engineering
KW - thermal comfort
ER -
TY - PAT
TI - Polypropylene composites and method for preparation thereof
C2 - 2019/6/14/
DA - 2019/6/14/
PY - 2019/6/14/
ER -
TY - JOUR
TI - Fluid surface coatings for solid-state nanopores: comparison of phospholipid bilayers and archaea-Inspired lipid monolayers
T2 - Nanotechnology
AB - In the context of sensing and characterizing single proteins with synthetic nanopores, lipid bilayer coatings provide at least four benefits: first, they minimize unwanted protein adhesion to the pore walls by exposing a zwitterionic, fluid surface. Second, they can slow down protein translocation and rotation by the opportunity to tether proteins with a lipid anchor to the fluid bilayer coating. Third, they provide the possibility to impart analyte specificity by including lipid anchors with a specific receptor or ligand in the coating. Fourth, they offer a method for tuning nanopore diameters by choice of the length of the lipid's acyl chains. The work presented here compares four properties of various lipid compositions with regard to their suitability as nanopore coatings for protein sensing experiments: (1) electrical noise during current recordings through solid-state nanopores before and after lipid coating, (2) long-term stability of the recorded current baseline and, by inference, of the coating, (3) viscosity of the coating as quantified by the lateral diffusion coefficient of lipids in the coating, and (4) the success rate of generating a suitable coating for quantitative nanopore-based resistive pulse recordings. We surveyed lipid coatings prepared from bolaamphiphilic, monolayer-forming lipids inspired by extremophile archaea and compared them to typical bilayer-forming phosphatidylcholine lipids containing various fractions of curvature-inducing lipids or cholesterol. We found that coatings from archaea-inspired lipids provide several advantages compared to conventional phospholipids; the stable, low noise baseline qualities and high viscosity make these membranes especially suitable for analysis that estimates physical protein parameters such as the net charge of proteins as they enable translocation events with sufficiently long duration to time-resolve dwell time distributions completely. The work presented here reveals that the ease or difficulty of coating a nanopore with lipid membranes did not depend significantly on the composition of the lipid mixture, but rather on the geometry and surface chemistry of the nanopore in the solid state substrate. In particular, annealing substrates containing the nanopore increased the success rate of generating stable lipid coatings.
DA - 2019/4/16/
PY - 2019/4/16/
DO - 10.1088/1361-6528/ab19e6
UR - http://dx.doi.org/10.1088/1361-6528/ab19e6
KW - nanopore
KW - single protein
KW - lipid coating
KW - archaea-inspired lipids
KW - stability
KW - noise
ER -
TY - CONF
TI - Development of a Colorimetric Sensor for the Detection of Methyl Salicylate during Man-In-Simulant Test
AU - Woods, E.
AU - Williams, T.N.
AU - Ormond, R.B.
T2 - 133rd NC Local Section Meeting of the American Chemical Society
C2 - 2019/11//
C3 - 133rd NC Local Section Meeting of the American Chemical Society
CY - Research Triangle Park, NC
DA - 2019/11//
PY - 2019/11//
ER -
TY - CONF
TI - Designing the next generation of hair dyes using cheminformatics
AU - Williams, T.N.
AU - Van Den Driessche, G.A.
AU - Fourches, D.
AU - Freeman, H.S.
T2 - American Chemical Society National Meeting & Expo
C2 - 2019/4//
C3 - American Chemical Society National Meeting & Expo
CY - Orlando, FL
DA - 2019/4//
PY - 2019/4//
ER -
TY - CONF
TI - Design and development of stent coated with novel cardiac stem cell-mimicking regenerative factors
AU - Bambharoliya, T.
AU - Hu, S.
AU - Cheng, K.
AU - King, M.W.
C2 - 2019///
C3 - Transactions of the Annual Meeting of the Society for Biomaterials and the Annual International Biomaterials Symposium
DA - 2019///
VL - 40
SP - 481
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85065394023&partnerID=MN8TOARS
ER -
TY - JOUR
TI - Correlation of Micro- and Macrostructural Attributes with the Foamability of Modified Polypropylene Using Supercritical CO2
AU - Banerjee, Debjyoti
AU - Dutta, Anindya
AU - Vimal, Kakkarakkal Kottiyath
AU - Kapur, Gurpreet Singh
AU - Ghosh, Anup K.
T2 - Industrial & Engineering Chemistry Research
AB - This study covers the micro- and macrostructural changes that take place prior to and after foaming in polypropylene (PP). Four industrial grades of PP with varying molecular weights and amorphous contents were considered. Batch foaming of the samples was carried out using supercritical CO2 at three different temperatures, keeping the saturation pressure constant. A straight correlation between the cell size and the density of foams was drawn. Differential scanning calorimetry measurements in coherence with wide-angle X-ray analysis gave unique insights into the crystallinity of foams. Furthermore, dynamic mechanical analysis (DMA) showed shifts in the transition peaks of foamed PPs as compared with their corresponding unfoamed states. The tensile properties of foams of impact copolymers, foamed at low temperature, possessed superior tensile toughness to that of the foams obtained from homopolymers and random copolymers. This tensile characteristic of foams was in coherence with the DMA analysis.
DA - 2019/7/10/
PY - 2019/7/10/
DO - 10.1021/acs.iecr.9b01258
VL - 58
IS - 27
SP - 12054-12065
UR - http://dx.doi.org/10.1021/acs.iecr.9b01258
ER -
TY - JOUR
TI - Influence of Carbonyl Group on Photocurrent Density of Novel Fluorene Based D-π-A Photosensitizers: Synthesis, Photophysical and Photovoltaic Studies
T2 - Journal of Photochemistry and Photobiology A: Chemistry
AB - Herein, we developed novel and promising low-cost metal free organic dyes 7a-c and 10a-c via a simple, highly efficient, and high yield through two-step methodology based on Suzuki coupling reaction. These new dyes characterized with D-π-A architecture, utilized a binary π-conjugated spacer comprised of fluorenone and thiophene or spiro fluorene and thiophene. This construction would help in studying the impact of π-spacers on the photovoltaic (PV) parameters of fabricated DSSCs. The highest photocurrent efficiency (PCE) of 3.5%, JSC (7.80 mA cm−2), VOC (0.62 V) and FF (69.11%) was achieved by photosensitizer 10b incorporating spiro fluorene π-spacers moiety compared to PCE of 2.70%, JSC (6.45 mA cm−2), VOC (0.57 V) and FF (71.50%) for dye 7b with fluorenone π-spacers at the AM1.5 G conditions and using a volatile redox electrolyte (iodide/triiodide). DFT/TD-DFT calculations were used to clarify the relation between the molecular structure, photophysical and photoelectrochemical properties utilizing GAUSSIAN 09 programming. Interestingly, DFT results showed a distribution of a frontier LUMO isosurface between the carbonyl group of fluorenone and the acceptor part in case of photosensitizers 7a-c compared to 10a-c, which shows a complete frontier LUMO shift to the acceptor part only. This confirms the effect of carbonyl group on trapping the electrons. This causes a weak electron injection into TiO2 surface, which lowered the photocurrent conversion efficiency of 7a-c dyes compared to 10a-c. The dyes structures were confirmed by UV–vis, emission spectrophotometry, FT-IR, ESI-MS and 1H-NMR.
DA - 2019/10//
PY - 2019/10//
DO - 10.1016/j.jphotochem.2019.112133
UR - http://dx.doi.org/10.1016/j.jphotochem.2019.112133
KW - Synthesis
KW - Fluorene
KW - Photophysical
KW - TD-DFT
KW - Solar energy
ER -
TY - CONF
TI - Investigating Process-Structure Relationships of 3D-MeltBlowing for Tissue Engineering Applications
AU - Schuchard, K.
AU - Pourdeyhimi, B.
AU - Fisher, M.B.
AU - Shirwaiker, R.
T2 - Institute of Industrial and Systems Engineers Annual Conference
C2 - 2019///
CY - Orlando, FL
DA - 2019///
PY - 2019/5/18/
ER -
TY - CONF
TI - Nonwoven Sustainability (Keynote)
AU - Pourdeyhimi, B.
T2 - Nonwoven Research Academy, EDANA
C2 - 2019/10//
CY - Denkendorf, Germany
DA - 2019/10//
PY - 2019/10//
ER -
TY - CONF
TI - Recent Trends in Nonwovens and Sustainability
AU - Pourdeyhimi, B.
T2 - RISE
C2 - 2019/9//
CY - Raleigh, NC
DA - 2019/9//
PY - 2019/9//
ER -
TY - CONF
TI - Anisotropic Scaffold Fabrication using High-Throughput 3D-Melt Blowing
AU - Schuchard, K.
AU - Anderson, B.
AU - Grondin, P.
AU - Fisher, M.B.
AU - Pourdeyhimi, B.
AU - Shirwaiker, R.
T2 - Biofabrication
C2 - 2019///
CY - Columbus, OH
DA - 2019///
PY - 2019/10/20/
ER -
TY - RPRT
TI - Elastomeric depth filter
AU - Pourdeyhimi, B.
DA - 2019/11/5/
PY - 2019/11/5/
M1 - 10,464,000
M3 - U.S. Patent
SN - 10,464,000
ER -
TY - JOUR
TI - Modeling Polymer Crystallization Kinetics in the Meltblowing Process
AU - Ghosal, Arkaprovo
AU - Chen, Kailin
AU - Sinha-Ray, Suman
AU - Yarin, Alexander L.
AU - Pourdeyhimi, Behnam
T2 - Industrial & Engineering Chemistry Research
AB - A novel model of the crystallization process in meltblowing process is proposed and implemented in numerical simulations. The spinline crystallization is studied using numerical solutions of the system of coupled quasi-one-dimensional equations describing the dynamics of multiple polymer jets moving in the surrounding high-speed air. Cooling, crystallization, and solidification accompany three-dimensional motion of polymer jets resulting in their vigorous stretching by the air flux including the aerodynamically driven bending/flapping. The numerical solutions predict distribution of the degree of crystallinity in polymer jets in flight, as well as in the laydown formed on the collecting screen, with the three-dimensional structure of the laydown being fully reconstructed. The effect of the collector screen temperature, die-to-collector distance (DCD), and the activation energy of the viscous flow in the polymer melt on the laydown features is studied in detail.
DA - 2019/12/6/
PY - 2019/12/6/
DO - 10.1021/acs.iecr.9b04840
VL - 59
IS - 1
SP - 399-412
J2 - Ind. Eng. Chem. Res.
LA - en
OP -
SN - 0888-5885 1520-5045
UR - http://dx.doi.org/10.1021/acs.iecr.9b04840
DB - Crossref
ER -
TY - JOUR
TI - The molecular engineering, synthesis and photovoltaic studies of a novel highly efficient Ru(ii) complex incorporating a bulky TPA ancillary ligand for DSSCs: Donor: versus π-spacer effects
AU - Abdellah, I.M.
AU - El-Shafei, A.
T2 - RSC Advances
AB - The IA-7 complex was applied in DSSCs.
DA - 2019///
PY - 2019///
DO - 10.1039/c9ra06150a
VL - 10
IS - 1
SP - 610-619
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85077506385&partnerID=MN8TOARS
ER -
TY - CONF
TI - Designing an antimicrobial knitted wound dressing for vacuum assisted wound closure
AU - Zha, D.
AU - Nakod, P.
AU - He, T.
AU - El-Shafei, A.
AU - Brown, A.
AU - Hudson, S.
AU - King, M.W.
C2 - 2019///
C3 - Transactions of the Annual Meeting of the Society for Biomaterials and the Annual International Biomaterials Symposium
DA - 2019///
VL - 40
SP - 603
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85065387853&partnerID=MN8TOARS
ER -
TY - JOUR
TI - Application of the Internet of Things in the textile industry
AU - Manglani, Hitesh
AU - Hodge, George L.
AU - Oxenham, William
T2 - Textile Progress
AB - The ‘Internet of Things’ (IoT) is at times mythologized and its purpose mistaken, and often people can become confused about what it means, does or aims to achieve; moreover, without a financial appraisal of the differences IoT can make to their own enterprise, business leaders may be content to watch and wait rather than to take a lead. This issue of Textile Progress aims to provide a guide to help navigation beyond general statements about IoT and to help those involved with the textile industry to make an informed decision about its potential value to them. The definitions of the Internet of Things (IoT) available in the literature, and those put forth by organizations working on IoT standards development, are reviewed along with its architecture, elements, standards and protocols to help provide an understanding of the concepts and goals of IoT. A broad overview of impediments challenging the progress of IoT, especially in relation to cybersecurity, is provided. This review also compares ongoing work in the application of IoT in the textile industry to that in other manufacturing sectors whilst focussing on the interpretation of IoT technologies and their potential application to the textile industry according to both technological and business perspectives. A specific case study for the spinning industry is conducted to help with evaluation of its IoT solutions and to help to address how other parts of the textile industry might benefit from its application. The case study includes evaluation of IoT solutions in the spinning industry spanning the period between ITMA 2011 to 2019, and takes information from interviews with industry executives to inform future directions of IoT in the spinning industry.
DA - 2019/7/3/
PY - 2019/7/3/
DO - 10.1080/00405167.2020.1763701
VL - 51
IS - 3
SP - 225-297
UR - https://doi.org/10.1080/00405167.2020.1763701
KW - Internet of Things
KW - industrial Internet of Things
KW - digitalization
KW - cyber physical systems
KW - industry 4.0
KW - cybersecurity
KW - cyber physical production systems
KW - digital twins
KW - smart production
KW - textile industry
KW - IoT
KW - CPS
KW - CPPS
KW - IIoT
KW - ITMA
ER -
TY - JOUR
TI - Investigation of the Influence of Film Thickness on Phase Behavior of an Immiscible Binary Polymer Mixture
T2 - Global Journal of Engineering Sciences
AB - Recently, polymer phase behavior got much attention both in scientific research and industrial applications. Phase separation plays a vital role during practical applications of polymer mixture as the properties depend on its dynamics and structures. Researchers put intense interest to analyze phase separation of immiscible polymer blends and observed that various factors such as temperature, molecular weight, substrate and film thickness influence polymer phase separation process. Among them, film thickness dependence got immense attraction now a days. Film thickness dependence of phase separation of binary polymer mixture coupled with various analytical techniques, is discussed in Film thickness, phase separation, microscopic analysis, AFM, SEM, XPS, TEM this review.
DA - 2019/11/15/
PY - 2019/11/15/
DO - 10.33552/gjes.2019.04.000576
UR - http://dx.doi.org/10.33552/gjes.2019.04.000576
ER -
TY - JOUR
TI - Fused Deposition Modeling 3D Printing Technology in Textile and Fashion Industry: Materials and Innovation
T2 - Modern Concepts in Materials Science
DA - 2019/11/13/
PY - 2019/11/13/
UR - https://irispublishers.com/mcms/pdf/MCMS.MS.ID.000529.pdf
ER -
TY - CHAP
TI - Biodegradable Polymer Blends for Food Packaging Applications
PY - 2019/11/11/
UR - https://books.google.com/books?hl=en&lr=&id=Gs2-DwAAQBAJ&oi=fnd&pg=PA151&dq=Biodegradable+Polymer+Blends+for+Food+Packaging+Applications&ots=yrviJbMLHo&sig=byKeIKOS0RqJwKKR5jqNOAMUfo4#v=onepage&q=Biodegradable%20Polymer%20Blends%20for%20Food%20Packaging%20Applications&f=false
ER -
TY - JOUR
TI - Water-processable, sprayable LiFePO4/graphene hybrid cathodes for high-power lithium ion batteries
T2 - Journal of Industrial and Engineering Chemistry
AB - Here, we demonstrate facile water-processable and sprayable electrode fabrication methods for LiFePO4/graphene hybrid cathodes in LIBs, without using an organic solvent. The multi-functionality of graphene oxide (GO), as a dispersant, binder, and precursor for the conductive graphene, was exploited in this fabrication process. Additional polymeric binders or conductive carbons were unnecessary. At high current rates, this water-processed LiFePO4/reduced graphene oxide (LFP/rGO) can store a larger amount of charges than conventional LFP cathodes produced by the previously formulated organic slurry-based blade coating method. The LFP/rGO electrode consisting of 80 wt.% LFP and 20 wt.% rGO showed capacity of 37 mA h g−1 at a very high current rate (2040 mA g−1). In contrast, the conventional LFP–based electrodes fabricated with poly(vinylidene fluoride), and carbon black in an organic solvent, exhibited negligible capacity (<1 mA h g−1) at such a high current rate. The cycling stability of the sprayed LFP/rGO electrode was also significantly higher than that of the conventional LFP–based electrodes under harsh electrochemical conditions. After 1000 cycles at 3400 mA g−1 from 1.5 to 4.5 V (vs. Li/Li+), the sprayed LFP/rGO and conventional LFP/PVdF/carbon electrode exhibited capacity retention levels of 88% and 38%, respectively.
DA - 2019/12//
PY - 2019/12//
DO - 10.1016/j.jiec.2019.12.022
UR - http://dx.doi.org/10.1016/j.jiec.2019.12.022
KW - Water-processable
KW - Lithium iron phosphate
KW - Graphene
KW - Lithium ion battery
KW - Cathode
KW - Energy storage
ER -
TY - JOUR
TI - Recent developments in bio-monitoring via advanced polymer nanocomposite-based wearable strain sensors
T2 - Biosensors and Bioelectronics
AB - Recent years, an explosive growth of wearable technology has been witnessed. A highly stretchable and sensitive wearable strain sensor which can monitor motions is in great demand in various fields such as healthcare, robotic systems, prosthetics, visual realities, professional sports, entertainments, etc. An ideal strain sensor should be highly stretchable, sensitive, and robust enough for long-term use without degradation in performance. This review focuses on recent advances in polymer nanocomposite based wearable strain sensors. With the merits of highly stretchable polymeric matrix and excellent electrical conductivity of nanomaterials, polymer nanocomposite based strain sensors are successfully developed with superior performance. Unlike conventional strain gauge, new sensing mechanisms include disconnection, crack propagation, and tunneling effects leading to drastically resistance change play an important role. A rational choice of materials selection and structure design are required to achieve high sensitivity and stretchability. Lastly, prospects and challenges are discussed for future polymer nanocomposite based wearable strain sensor and their potential applications.
DA - 2019/1//
PY - 2019/1//
DO - 10.1016/j.bios.2018.08.037
UR - http://dx.doi.org/10.1016/j.bios.2018.08.037
KW - Wearable
KW - Strain
KW - Sensor
KW - Bio-monitoring
KW - Polymer
KW - Nanocomposite
ER -
TY - JOUR
TI - Nano silica-carbon-silver ternary hybrid induced antimicrobial composite films for food packaging application
T2 - Food Packaging and Shelf Life
AB - In this work, Ag assisted biobased silica-carbon nanoparticles (SCAg-NPs) were incorporated into a viscous biopolymer solution to fabricate antimicrobial thin films using 3D printing technique. The Ag NPs were prepared in situ from AgNO3 through one-step ball milling in the presence of silica-carbon hybrid obtained from pyrolysis of rice husk. The nanostructure of the SCAg-NPs was determined by XRD and TEM. These as-synthesized particles were also characterized by XPS analysis. The printed films were characterized by XRD, FE-SEM, Raman microanalysis, TGA, DSC and tensile testing to investigate the influence of nanoparticles on the thermal and mechanical properties on the films. Antimicrobial testing was carried out on the films to assess the inhibitory effect of SCAg NPs on Salmonella Enteritidis inoculum. XRD, XPS and Raman microanalysis confirmed the incorporation of Ag particles into SCNPs, while FE-SEM size measurement of the SCAg NPs ranged between 10–100 nm in diameter. Thermal analysis revealed that the inclusion of SCAg NPs led to improvement in the thermal stability of the fabricated nanocomposites films. Tensile test was carried out to determine the influence of SCAg NPs on mechanical properties of the films and found moderate increase in the strength of the polymer film.
DA - 2019/3//
PY - 2019/3//
DO - 10.1016/j.fpsl.2018.12.003
UR - http://dx.doi.org/10.1016/j.fpsl.2018.12.003
KW - Rice husk
KW - Silica-carbon-silver NPs
KW - Nanocomposites thin films
KW - Food packaging
ER -
TY - JOUR
TI - Investigations into structure-property relationships of novel Ru(II) dyes with N,N '-Diethyl group in ancillary ligand for dye-sensitized solar cells
AU - Ashraf, Saba
AU - Su, Rui
AU - Akhtar, Javeed
AU - Siddiqi, Humaira M.
AU - Shuja, Ahmed
AU - Al-Saad, Khalid A.
AU - Al-Qaradawi, Siham Y.
AU - El-Shafei, Ahmed
T2 - DYES AND PIGMENTS
AB - Structure-property relationships of four novel bipyridyl Ru(II) complexes, denoted as SD-22, SD-24, SD-26 and SD-28, are reported herein. The molecular structures of all four photosensitizers were confirmed using FT-IR, 1H NMR and mass spectrometry. Photovoltaic characteristics of the photosensitizers were evaluated under 1.5 a.m. standard illumination condition, in presence of deoxycholic acid as co-adsorbent, and subsequently compared to the performance of the benchmark, Z907. SD-22 showed an IPCE of 52% and 50% at 440 nm and 550 nm, respectively, a short-circuit photocurrent density (JSC) of 17.37 mA cm−2, open-circuit photovoltage (VOC) of 0.63 V and fill factor (FF) of 0.66, producing an overall conversion efficiency (η) of 7.31%, which outperformed Z907 (7.02%) under the same experimental device conditions. The η of the other photosensitizers is in the following order: SD-22 > SD-28 > SD-26 > SD-24. Photosensitizer SD-22 has N,N′-dialkyl group attached to a benzene ring while SD-24 has N,N′-dialkyl without a benzene ring. The extended conjugation in SD-22 translated into higher overall solar-to-electric conversion efficiency. Substitution of dialkylamino-based ancillary ligands of Ru(II) dyes SD-26 and SD-28 with –OCH3 and –OC6H13 also demonstrated that the photovoltaic performance of polypyridyl ruthenium photosensitizers is a function of the donating power of ancillary ligands as well as the steric effect of alkoxy auxochromes at –ortho position.
DA - 2019/12//
PY - 2019/12//
DO - 10.1016/j.dyepig.2019.107754
VL - 171
SP -
SN - 1873-3743
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85073088390&partnerID=MN8TOARS
KW - Solar cell
KW - Ruthenium dyes
KW - Ancillary ligands
KW - Structure-property relationship
ER -
TY - JOUR
TI - Asymmetric Dual Anchoring Sensitizers/Cosensitizers for Dye Sensitized Solar Cell Application: An Insight into Various Fundamental Processes inside the Cell
AU - Kesavan, Rajalakshmi
AU - Attia, Fathy
AU - Su, Rui
AU - Anees, P.
AU - El-Shafei, Ahmed
AU - Adhikari, Airody Vasudeva
T2 - JOURNAL OF PHYSICAL CHEMISTRY C
AB - To study the various fundamental processes occurring inside the dye sensitized solar cell (DSSC), we have fabricated devices employing newly synthesized diphenylamine-based organic dyes with A-D-π-A configuration, carrying four different anchoring groups, namely, cyanoacetic acid (DDC), rhodanine acetic acid (DDR), 4-hydrazinylbenzoic acid (DDH), and barbituric acid (DDB), as effective sensitizers/cosensitizers. In the present work, all the bianchoring dyes were subjected to photophysical, electrochemical, thermodynamic, photoelectrochemical, and theoretical studies. All of them displayed characteristic λabs and λemi in the range of 415–480 and 570–680 nm, respectively. Their optical and electrochemical band gaps were calculated to be in the order of 2.1 to 2.3 eV. The calculated driving forces for electron injection (ΔGinj), recombination (ΔGinj), and regeneration (ΔGreg) processes were found to be negative, showing the feasibility of these processes, while their DFT studies clearly indicated the directional flow of electrons within the dye in the cell. The devices with DDC as sensitizer displayed the highest conversion efficiency of 2.53%, whereas DDB exhibited the maximum of 7.69% when employed as a cosensitizer along with Ru (II) based HD-2 dye. Finally, EIS circuit fitting was carried out in order to obtain different interface resistance values to study the fundamental processes of energy conversion.
DA - 2019/10/10/
PY - 2019/10/10/
DO - 10.1021/acs.jpcc.9b06525
VL - 123
IS - 40
SP - 24383-24395
SN - 1932-7455
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85072953120&partnerID=MN8TOARS
ER -
TY - JOUR
TI - Novel metal-free organic dyes constructed with the D-D vertical bar A-pi-A motif: Sensitization and co-sensitization study
AU - Sun, Rui
AU - Lyu, Luping
AU - Elmorsy, Mohamed R.
AU - El-Shafei, Ahmed
T2 - SOLAR ENERGY
AB - A new structural motif, D-D|A-π-A, was suggested for the design of novel metal-free organic sensitizers, where “D|A” represents a fused donor-acceptor conjugated building block. Three organic dyes, coded FS07, FS08 and FS09, were synthesized accordingly with the incorporation of indolo [2,3-b] quinoxaline (IQ) as the main building block but different additional donors. The synthesized dyes were well-characterized and their photophysical and electrochemical properties were well-studied. Additionally, molecular modeling via DFT method was employed to probe their photovoltaic behaviors as sensitizers/co-sensitizers. The isodensity of the molecular orbitals displays the distinguished intramolecular charge delocalization in the IQ moiety, even though its donor and acceptor sections are coplanar-fused. In the photovoltaic characterization, FS08 exhibited the best DSSC performance. Moreover, FS07, FS08 and FS09 were co-sensitized along with a typical high efficient bipyridyl Ru(II) sensitizer, HD-2, in order to induce the light harvesting over expanded spectral region and hence improve the efficiency. The solar cell co-sensitized with FS08 displayed improved efficiency of 7.94% with JSC of 19.37 mA⋅cm−2, VOC of 0.654 V and FF of 62.7%, which outperformed the device employing HD-2 alone (efficiency of 7.46%). Owing to the appropriate dye loading of FS08 in the presence of HD-2 and CDCA mixed dye solution, the benign coordination for light harvesting was guaranteed and the photoexcitation was maximized, the co-sensitized JSC was improved; due to the well-modified TiO2 surface coverage with the tight attachment of FS08 and HD-2, the dye aggregation was diminished and the undesired charge recombination was suppressed, the co-sensitized VOC was improved.
DA - 2019/12//
PY - 2019/12//
DO - 10.1016/j.solener.2019.10.061
VL - 194
SP - 400-414
SN - 0038-092X
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85074473045&partnerID=MN8TOARS
KW - Metal-free organic sensitizer
KW - D-D vertical bar A-pi-A
KW - Fused donor-acceptor conjugation
KW - Indolo[2,3-b]quinoxaline (IQ)
KW - Co-sensitization
ER -
TY - JOUR
TI - Three-component one-pot reaction for molecular engineering of novel cost-effective highly rigid quinoxaline-based photosensitizers for highly efficient DSSCs application: Remarkable photovoltage
AU - Lyu, Luping
AU - Su, Rui
AU - Al-Qaradawi, Siham Y.
AU - Al-Saad, Khalid A.
AU - El-Shafei, Ahmed
T2 - DYES AND PIGMENTS
AB - A simple three-component one-pot approach was developed to generate three novel highly rigid quinoxaline-based dyes, which were further investigated as sensitizers of dye-sensitized solar cells (DSSCs). The effect of different push-pull molecular motifs containing various donors and attachment of long alkyl chains on photophysical, electrochemical and photovoltaic performances, along with theoretical calculations were studied comprehensively. In particular, LY03-based DSSCs showed the highest efficiency of 7.04% with a short-circuit photocurrent density (JSC) of 14.32 mA cm−2, an open-circuit photovoltage (VOC) of 910 mV and a fill factor (FF) of 0.54% under AM 1.5 irradiation (100 mW cm−2). The results confirm that improving the molecular rigidity of sensitizer and incorporation of long alkyl chains into an auxiliary acceptor and donor is one of the most effective pathways to prevent “trade-off” effect, which translated into remarkable improvement in open-circuit photovoltage of 0.91 V, hence, enhancing the photovoltaic performance.
DA - 2019/12//
PY - 2019/12//
DO - 10.1016/j.dyepig.2019.107683
VL - 171
SP -
SN - 1873-3743
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85068505054&partnerID=MN8TOARS
KW - DSSC
KW - Quinoxaline
KW - Auxiliary acceptor
KW - Metal-free organic dyes
KW - Long alkyl chain
KW - Rigidified chromophore
ER -
TY - JOUR
TI - Influence of demographics and motivational factors on US consumer clothing and shoes disposal behavior
AU - Rezaei Arangdad, S.
AU - Thoney-Barletta, K.
AU - Joines, J.
AU - Rothenberg, L.
T2 - Research Journal of Textile and Apparel
AB - Purpose The purpose of this paper is to study clothing and shoes disposal behavior of US consumers in an attempt to understand how to divert more clothing and shoes from the landfill. Design/methodology/approach A survey was administered to 209 consumers from the general US population. The survey includes questions on demographics, methods of disposal and factors that motivate or prevent consumers from choosing methods other than throwing unwanted clothing in the trash. Findings Analysis of demographic data from the survey indicates that gender, income, marital status, living arrangement and type of dwelling have an effect on whether consumers recycle textiles. Other survey results indicate that helping factors are more influential in motivating consumers to recycle clothing and shoes than economic factors. The condition of clothes and shoes and lack of awareness are the most prominent reasons preventing consumers from recycling more textiles. The results also show that there are statistically significant differences between households with and without children when it comes to disposing adults’ clothing and shoes. Originality/value These results may help policymakers who want to motivate consumers to recycle or develop recycling programs.
DA - 2019/9/9/
PY - 2019/9/9/
DO - 10.1108/rjta-08-2018-0051
VL - 23
IS - 3
SP - 170–188
UR - http://dx.doi.org/10.1108/rjta-08-2018-0051
KW - Clothing disposal
KW - Clothing recycling
KW - Discard practices
KW - Recycling behaviour
KW - Textile waste
ER -
TY - JOUR
TI - Tensor Algebra-based Geometrical (3D) Biomacro-Molecular Descriptors for Protein Research: Theory, Applications and Comparison with other Methods
AU - Terán, Julio E.
AU - Marrero-Ponce, Yovani
AU - Contreras-Torres, Ernesto
AU - García-Jacas, César R.
AU - Vivas-Reyes, Ricardo
AU - Terán, Enrique
AU - Torres, F. Javier
T2 - Scientific Reports
AB - Abstract In this report, a new type of tridimensional (3D) biomacro-molecular descriptors for proteins are proposed. These descriptors make use of multi-linear algebra concepts based on the application of 3-linear forms ( i . e ., Canonical Trilinear (Tr), Trilinear Cubic (TrC), Trilinear-Quadratic-Bilinear (TrQB) and so on) as a specific case of the N -linear algebraic forms. The definition of the k th 3-tuple similarity-dissimilarity spatial matrices ( Tensor’s Form ) are used for the transformation and for the representation of the existing chemical information available in the relationships between three amino acids of a protein. Several metrics ( Minkowski-type, wave-edge , etc) and multi-metrics ( Triangle area, Bond-angle , etc) are proposed for the interaction information extraction, as well as probabilistic transformations ( e . g ., simple stochastic and mutual probability) to achieve matrix normalization. A generalized procedure considering amino acid level-based indices that can be fused together by using aggregator operators for descriptors calculations is proposed. The obtained results demonstrated that the new proposed 3D biomacro-molecular indices perform better than other approaches in the SCOP-based discrimination and the prediction of folding rate of proteins by using simple linear parametrical models. It can be concluded that the proposed method allows the definition of 3D biomacro-molecular descriptors that contain orthogonal information capable of providing better models for applications in protein science.
DA - 2019/8/6/
PY - 2019/8/6/
DO - 10.1038/s41598-019-47858-2
VL - 9
IS - 1
J2 - Sci Rep
LA - en
OP -
SN - 2045-2322
UR - http://dx.doi.org/10.1038/s41598-019-47858-2
DB - Crossref
ER -
TY - JOUR
TI - Highly Efficient Purification of Multicomponent Wastewater by Electrospinning Kidney-Bean-Skin-like Porous H-PPAN/rGO-g-PAO@Ag+/Ag Composite Nanofibrous Membranes
AU - Han, Na
AU - Wang, Weijing
AU - Lv, Xingshuai
AU - Zhang, Wenxin
AU - Yang, Chao
AU - Wang, Menglu
AU - Kou, Xiaohui
AU - Li, Wei
AU - Dai, Ying
AU - Zhang, Xingxiang
T2 - ACS APPLIED MATERIALS & INTERFACES
AB - Due to the complexity of harmful wastewater components, environmental and multifunctional materials are required for sewage purification. In this paper, a novel kidney-bean-skin-like hydrophilic porous polyacrylonitrile/reduced graphene oxide-g-poly(amidoxime)-loaded Ag+ (H-PPAN/rGO-g-PAO@Ag+/Ag) composite nanofiber membrane was fabricated by combining electrospinning and hydrolysis methods. The spinning solution was pumped at a rate of 0.4 mL/h with the voltage set at a constant value of 23 kV. Then, some of the -CN groups switched to hydrophilic -COOH groups via a hydrolysis method, which acts as a linker of GO-g-PAN, Ag+, and the polyacrylonitrile (PAN) matrix. A further step of chelation and thermal treatment were used for generating Schottky junctions between rGO-g-PAO@Ag+ and Ag. After five-cycle tests, it exhibited outstanding mechanical properties ensuring the filtration and purification performance of the H-PPAN/rGO-g-PAO@Ag+/Ag composite nanofiber membrane (i.e., the tensile strength was still 7.21 MPa, and the elongation was 61.53%) for simulated wastewater. The methods of thermal treatment and high-pressure Hg lamp irradiation promoted the reduction of GO to rGO and Ag+ to Ag particles, which endows the final product H-PPAN/rGO-g-PAO@Ag+/Ag with excellent photocatalytic and bactericidal properties. Its catalytic efficiency for dyes benzoic acid (BA), Rhodamine B (RhB), methylene blue (MB), and methyl orange (MO) was up to 99.8, 98, 95, and 91%. The antibacterial rate was 100% against Escherichia coli and 99% against Staphylococcus aureus. More importantly, the photocatalytic and antibacterial PAN-based nanofiber membrane can be simply scaled up, which provides the membrane with great potential in highly efficient wastewater treatment and augmenting water supply.
DA - 2019/12/18/
PY - 2019/12/18/
DO - 10.1021/acsami.9b16889
VL - 11
IS - 50
SP - 46920-46929
SN - 1944-8252
KW - Schottky junction
KW - photocatalysis
KW - filtration
KW - antibacterial activity
KW - nanofibrous membrane
ER -
TY - JOUR
TI - Bioinspired Superwettable Covalent Organic Framework Nanofibrous Composite Membrane with a Spindle-Knotted Structure for Highly Efficient Oil/Water Emulsion Separation
AU - Zhang, Zongxuan
AU - Han, Na
AU - Tan, Linli
AU - Qian, Yongqiang
AU - Zhang, Haoran
AU - Wang, Menglu
AU - Li, Wei
AU - Cui, Zhenyu
AU - Zhang, Xingxiang
T2 - LANGMUIR
AB - Covalent organic frameworks (COFs) have attracted broad interest in a number of fields including gas access, catalysis, and ionic adsorption. However, owing to the low stability in water, the application of COFs in the field of oil/water separation is extensively impeded. In this paper, we synthesized COF-DhaTab/polyacrylonitrile (PAN) nanofibrous composite membranes with a bioinspired spindle-knotted structure via a facile blending electrospinning method. The COF-DhaTab/PAN composite membrane shows prewetting-induced superoleophobicity under water and superhydrophobicity under oil. It possesses outstanding rejection ratio (>99.9%), excellent antifouling performance, and ultrahigh oil/water mixture flux up to 4229.29 L/m2h even though driven only by gravity. Specifically, an extraordinary oil contact angle under water (152.3°) and a satisfied water contact angle under oil (153.7°) were offered by the composite membrane. These are mainly attributed to the spindle-knotted structures induced by COFs. To the best of our knowledge, the application of COF/PAN composite membrane in the field of oil/water separation has never been reported. It is an innovative approach for oily wastewater treatment and oil purification.
DA - 2019/12/17/
PY - 2019/12/17/
DO - 10.1021/acs.langmuir.9b02661
VL - 35
IS - 50
SP - 16545-16554
SN - 0743-7463
ER -
TY - JOUR
TI - Washable, durable and flame retardant conductive textiles based on reduced graphene oxide modification
AU - Zhao, Yintao
AU - Wang, Jin
AU - Li, Zengqing
AU - Zhang, Xiangwu
AU - Tian, Mingwei
AU - Zhang, Xiansheng
AU - Liu, Xuqing
AU - Qu, Lijun
AU - Zhu, Shifeng
T2 - CELLULOSE
AB - Graphene has been highlighted in a variety of wearable electronics and smart textiles applications due to its unique properties such as high conductivity, transparency, flexibility and other excellent mechanical performance. Although there have been extensive efforts for graphene based conductive fibers/yarns, there are remaining challenges in terms of the seamless integration between 2D flakes, and reduced charge transport in a lower carrier concentration. Unstable resistance probably arises from the creation of gaps in the conductive parts of the smart textile. Also, regional temperatures can get too high, constituting a fire-safety hazard and endangering the wearer's safety. In this work, the synergistic effect of graphene and flame-retardant materials was investigated, and a conductive fabric was developed which is highly conductive and flame retardancy. Graphene has excellent electrical and thermal conductivity and acts synergistically with traditional flame-retardants on common fabrics. The electrical surface resistivity of hybrid material modified fabrics was as low as 0.54 kΩ/sq, so they could serve as safe and highly conductive conductor in a simple circuit and show excellent wash-ability. The limiting oxygen index of the fabric increased from 19 to 32 after modification in conjunction with the residue at 800 °C increased from 17.9 to 31%, which could be used as safe and highly conductive materials for smart textiles and wearable devices.
DA - 2019///
PY - 2019///
DO - 10.1007/s10570-019-02884-1
KW - Polyester
KW - cotton fabric
KW - Graphene oxide
KW - Phosphate flame retardant
KW - Electrical surface resistivity
KW - Flame retardancy
ER -
TY - PAT
TI - 用于对纱线施以假捻的设备和方法及用于生产纱线的设备
C2 - 2019/5/14/
DA - 2019/5/14/
PY - 2019/5/14/
ER -
TY - PAT
TI - 一种60-120Nm 100%全绢丝单纱的环保生产方法
C2 - 2019/2/20/
DA - 2019/2/20/
PY - 2019/2/20/
ER -
TY - CONF
TI - Extended Application of Modified Low Torque Cotton Spinning System
C2 - 2019/5//
C3 - The Fiber Society’s Spring 2020 Conference
DA - 2019/5//
UR - https://www.thefibersociety.org/Portals/0/Past%20Conferences/2019_Spring_Abstracts.pdf?ver=2019-07-16-122240-037
ER -
TY - PAT
TI - Apparatus and method for imparting false twist to a yarn
C2 - 2019/5/2/
DA - 2019/5/2/
PY - 2019/5/2/
ER -
TY - JOUR
TI - Yarn and fabric properties in a modified ring spinning system considering the effect of the friction surface of the false-twister
T2 - Textile Research Journal
AB - This paper experimentally studies the relationship between the friction surface of a false-twisting unit and the quality of cotton yarns produced by a modified ring spinning system, with the adoption of the single friction-belt false-twister. The friction surface of the false-twisting unit, as a key twisting component, has been studied in terms of material, surface roughness, hardness and diameter, as well as the interaction between these factors and resultant yarn properties, with particular attention to yarn imperfections. Experimental results showed that the false-twisting unit with a short interactive path demonstrated significant reduction of yarn imperfections, especially yarn neps. With the optimal false-twisting unit, performances of the modified yarns and their knitted fabrics were evaluated and compared with the conventional ones.
DA - 2019/8/29/
PY - 2019/8/29/
DO - 10.1177/0040517519873057
UR - http://dx.doi.org/10.1177/0040517519873057
KW - yarn properties
KW - ring spinning
KW - yarn neps
KW - friction-belt
KW - false-twister
ER -
TY - JOUR
TI - Systematic investigation of twist generation and propagation in a modified ring spinning system
AU - Yin, R.
AU - Tao, X.-M.
AU - Xu, B.-G.
T2 - Textile Research Journal
AB - Twisting is an important process used to form a continuous yarn from short staple fibers and to determine the structure and properties of the resultant yarn. This paper systematically examines the yarn twisting process in a modified ring spinning process based on a theoretical model proposed recently. To reduce the number of experiments, response surface methodology (RSM) involving a central composite design (CCD) in three factors—twist multiplier, speed ratio and wrap angle—was successfully employed for the study and analysis. The significant terms of the models were studied, and it was discovered that the speed ratio and wrap angle are statistically significant for the responses of twist efficiency, propagation coefficients of twist trapping, and congestion. More importantly, linear relationships were found among the three responses.
DA - 2019/8/8/
PY - 2019/8/8/
DO - 10.1177/0040517519866950
UR - http://dx.doi.org/10.1177/0040517519866950
KW - ring spinning
KW - twist generation
KW - twist propagation
KW - yarn twist
ER -
TY - CONF
TI - Novel Silk Single Yarns Spun on Cotton Spinning Frame
C2 - 2019/5//
C3 - The 10th Cross-straits Conference on Textiles
DA - 2019/5//
ER -
TY - JOUR
TI - Highly Sensitive and Durable Structured Fibre Sensors for Low-Pressure Measurement in Smart Skin
AU - Yang, B.
AU - Liu, S.
AU - Wang, X.
AU - Yin, R.
AU - Xiong, Y.
AU - Tao, X.
T2 - Sensors
AB - Precise measurements of low pressure are highly necessary for many applications. This study developed novel structured fibre sensors embedded in silicone, forming smart skin with high sensitivity, high durability, and good immunity to crosstalk for precise measurement of pressure below 10 kPa. The transduction principle is that an applied pressure leads to bending and stretching of silicone and optical fibre over a purposely made groove and induces the axial strain in the gratings. The fabricated sensor showed high pressure sensitivity up to 26.8 pm/kPa and experienced over 1,000,000 cycles compression without obvious variation. A theoretical model of the sensor was presented and verified to have excellent agreement with experimental results. The prototype of smart leg mannequin and wrist pulse measurements indicated that such optical sensors can precisely measure low-pressure and can easily be integrated for smart skins for mapping low pressure on three-dimensional surfaces.
DA - 2019/4/16/
PY - 2019/4/16/
DO - 10.3390/s19081811
VL - 19
IS - 8
UR - http://dx.doi.org/10.3390/s19081811
KW - pressure sensor
KW - fibre Bragg grating
KW - high sensitivity
KW - high durability
KW - soft matrix
ER -
TY - JOUR
TI - Enhanced Thermal-to-Flexible Phase Change Materials Based on Cellulose/Modified Graphene Composites for Thermal Management of Solar Energy
AU - Qian, Yongqiang
AU - Han, Na
AU - Zhang, Zongxuan
AU - Cao, Ruirui
AU - Tan, Linli
AU - Li, Wei
AU - Zhang, Xingxiang
T2 - ACS APPLIED MATERIALS & INTERFACES
AB - The applications of phase change materials (PCMs) in some practical circumstances are currently limited due to the constant strong rigidity, poor thermal conductivity, and low photoabsorption property. Therefore, the design of flexibility-enhanced, highly efficient PCMs is greatly desirable and challenging. In this work, novel PCM composites (CPmG-x) with stable forms and thermally induced flexibility were successfully prepared by grafting the comblike poly(hexadecyl acrylate) polymer (PA16, phase change working substance) onto a cellulose support by atom transfer radical polymerization (ATRP). Modified graphene (GN16) was incorporated into the synthesized material to enhance its enthalpy, thermal conductivity, and physical strength. The prepared CPmG-x composites exhibit excellent softness and flexibility after phase transition of PA16. The addition of GN16 increases the thermal conductivity and enthalpy of CPmG-x materials to 1.32 W m–1 K–1 (9 wt % GN16) and 103 J g–1 (5 wt % GN16), respectively. Assessments of the solar-to-thermal energy conversion and storage efficiencies indicate that CPmG-x composites possess great potential for use in thermal energy management applications and solar energy collection systems.
DA - 2019/12/11/
PY - 2019/12/11/
DO - 10.1021/acsami.9b18543
VL - 11
IS - 49
SP - 45832-45843
SN - 1944-8252
KW - cellulose
KW - graphene
KW - phase change materials
KW - thermally induced flexibility
KW - solar-to-thermal energy conversion and storage
ER -
TY - JOUR
TI - Performance Evaluation of Newly Developed Smoke and Particulate Resistant Structural Turnout Ensemble
AU - Ormond, R. Bryan
AU - Kwon, Cassandra H.
AU - Mathews, Marc C.
T2 - HOMELAND SECURITY AND PUBLIC SAFETY: RESEARCH, APPLICATIONS, AND STANDARDS
DA - 2019///
PY - 2019///
DO - 10.1520/STP161420180049
VL - 1614
SP - 286-305
SN - 0066-0558
UR - https://doi.org/10.1520/STP161420180049
KW - firefighter
KW - smoke
KW - particulate protection
KW - turnout ensemble
KW - cancer
KW - exposure
KW - personal protective equipment
ER -
TY - JOUR
TI - A Novel System Reliability Modeling of Hardware, Software, and Interactions of Hardware and Software
AU - Zhu, Mengmeng
AU - Pham, Hoang
T2 - MATHEMATICS
AB - In the past few decades, a great number of hardware and software reliability models have been proposed to address hardware failures in hardware subsystems and software failures in software subsystems, respectively. The interactions between hardware and software subsystems are often neglected in order to simplify reliability modeling, and hence, most existing reliability models assumed hardware subsystems and software subsystem are independent of each other. However, this may not be true in reality. In this study, system failures are classified into three categories, which are hardware failures, software failures, and hardware-software interaction failures. The main contribution of our research is that we further classify hardware-software interaction failures into two groups: software-induced hardware failures and hardware-induced software failures. A Markov-based unified system reliability modeling incorporating all three categories of system failures is developed in this research, which provides a novel and practical perspective to define system failures and further improve reliability prediction accuracy. Comparison of system reliability estimation between the reliability models with and without considering hardware-software interactions is elucidated in the numerical example. The impacts on system reliability prediction as the changes of transition parameters are also illustrated by the numerical examples.
DA - 2019/11//
PY - 2019/11//
DO - 10.3390/math7111049
VL - 7
IS - 11
SP -
SN - 2227-7390
KW - system reliability modeling
KW - Markov process
KW - software-induced hardware failures
KW - hardware-induced software failures
KW - hardware-software interactions
ER -
TY - JOUR
TI - Bioengineering tunable porosity in bacterial nanocellulose matrices
AU - Ashrafi, Zahra
AU - Lucia, Lucian
AU - Krause, Wendy
T2 - SOFT MATTER
AB - A facile and effective method is described to engineer original bacterial cellulose fibrous networks with tunable porosity. We showed that the pore shape, volume, and size distribution of bacterial nanocellulose membranes can be tailored under appropriate culture conditions specifically carbon sources. Pore characterization techniques such as capillary flow porometry, the bubble point method, and gas adsorption-desorption technique as well as visualization techniques such as scanning electron and atomic force microscopy were utilized to investigate the morphology and shape of the pores within the membranes. Engineering various shape, size and volume characteristics of the pores available in pristine bacterial nanocellulose membranes leads to fabrication and development of eco-friendly materials with required characteristics for a broad range of applications.
DA - 2019/12/7/
PY - 2019/12/7/
DO - 10.1039/c9sm01895f
VL - 15
IS - 45
SP - 9359-9367
SN - 1744-6848
ER -
TY - JOUR
TI - Cohesion energy of thermally-bonded polyethylene terephthalate nonwovens: Experiments and theory
AU - Zhang, Wenshuo
AU - Yarin, Alexander L.
AU - Pourdeyhimi, Behnam
T2 - Polymer Testing
AB - The present work aims at the experimental and theoretical investigation of the cohesion energy which can be achieved in the thermal calendar bonding of polymer nonwovens. Polyethylene terephthalate (PET) samples were used in the experiments. Tensile tests were conducted with the as-received PET nonwovens and thermally-bonded PET nonwovens. Thermal bonding was conducted under five temperatures: 160 °C, 170 °C, 180 °C, 190 °C, or 200 °C. The mechanical properties, Young's modulus, the yield stress, the maximum stress before sample failure and the toughness were measured. Blister tests were conducted aimed at measuring the cohesion energy of thermally-bonded PET nonwovens. The pushing shaft velocities of 2 mm/min and 10 mm/min were selected in the blister test. In addition, the theoretical description of the calendar bonding in the nip and of the forces acting on a nonwoven beyond the calendar nip is given. It is used to theoretically evaluate the cohesion energy of nonwovens due to thermal bonding in the nip. The predicted cohesion energy was estimated to be of the order of 4.2 J/m2, which is plausible for the experimental data corresponding to the lowest bonding temperature of 160 °C. On the other hand, at the higher bonding temperatures the experimentally measured cohesion energy was of the order of 10 J/m2, which can probably be attributed to the enhanced reptational entanglement at the elevated temperatures.
DA - 2019/9//
PY - 2019/9//
DO - 10.1016/j.polymertesting.2019.105984
VL - 78
SP - 105984
J2 - Polymer Testing
LA - en
OP -
SN - 0142-9418
UR - http://dx.doi.org/10.1016/j.polymertesting.2019.105984
DB - Crossref
KW - Cohesion energy
KW - Thermal calendar bonding
KW - Blister test
KW - Nonwovens
ER -
TY - JOUR
TI - Fabrication and bioevaluation of a medicated electrospun mat based on azido-cellulose acetate via click chemistry
AU - Nada, Ahmed A.
AU - Abdellatif, Faten Hassan Hassan
AU - Soliman, Ahmed A. F.
AU - Shen, Jialong
AU - Hudson, Samuel M.
AU - Abou-Zeid, Nabil Y.
T2 - CELLULOSE
DA - 2019/12//
PY - 2019/12//
DO - 10.1007/s10570-019-02739-9
VL - 26
IS - 18
SP - 9721-9736
SN - 1572-882X
KW - Electrospun fiber
KW - Click-scaffold
KW - Azidation
KW - Controlled release
KW - Wound healing
KW - Topical applications
ER -
TY - JOUR
TI - Cellulose Transparent and Flexible Films Prepared from DMAc/LiCl Solutions
AU - Sadeghifar, Hasan
AU - Venditti, Richard
AU - Pawlak, Joel J.
AU - Jur, Jesse
T2 - BIORESOURCES
AB - Cellulose transparent and flexible film was prepared by dissolving micro-crystalline cellulose powder in Dimethylacetamide/Lithium Chloride (DMAc/LiCl) followed by regeneration in acetone and subsequent washing with water. The solution was cast on a glass plate. The interactions of water molecules and the swollen cellulose in the gel were examined by differential scanning calorimetry, DSC. An increased melting point of water in the gel indicated the presence of stronger bonding between water and cellulose than in the non-modified cellulose. The prepared dried films had 63 g/m2 weight and 0.06 mm thickness with 1.14 g/cm3 density.The prepared dry film exhibited high transparency, around 95% with visible light. The transparency and mechanical properties of the films were stable at high temperature (120°C) and exposure to UV irradiation. Thermal analysis of the prepared sample indicated film stability up to 275 °C. The tensile strength of the cellulose film was around 120 MPa with about 10% strain to break. The mechanical properties of the films were stable in alkali and acidic solutions.
DA - 2019/11//
PY - 2019/11//
DO - 10.15376/biores.14.4.9021-9032
VL - 14
IS - 4
SP - 9021-9032
SN - 1930-2126
KW - Cellulose film
KW - DMAc/LiCl
KW - Transparent film
KW - Flexible film
ER -
TY - JOUR
TI - Kirigami‐Inspired Textile Electronics: K.I.T.E.
T2 - Advanced Materials Technologies
AB - Abstract Electronic textiles (e‐textiles) are in prime position to revolutionize the field of wearable electronics owing to their ubiquitous use and universal acceptance. However, mechanical incompatibility between the rigid conductive components on the soft textile platforms creates fragile e‐textile systems with poor electromechanical attributes. In this work, a novel design strategy to inkjet print reactive silver inks onto woven textiles with Kirigami‐inspired patterning to create e‐textiles with enhanced electromechanical features is introduced. By controlling the print processing and curing conditions, uniform conductive coatings with sheet resistances of 0.09 Ω sq −1 are achieved such that they do not interfere with the textiles innate flexibility, breathability, comfort, and fabric hand. The electromechanical coupling of the printed textiles shows a direct dependence on the anisotropic nature of the woven structures. Introducing Kirigami patterning creates robust devices that enhance and stabilize the electrical conductivity (Δ R / R 0 < −20%) over large strain regimes (>150%). Furthermore, an electrocardiogram monitoring system fabricated from Kirigami e‐textiles exhibits stable signal acquisition under extreme deformations from arm joint flexion. The distinct properties of Kirigami patterning on e‐textiles enable unprecedented electromechanical performance in wearable textile electronics.
DA - 2019/11//
PY - 2019/11//
DO - 10.1002/admt.201900511
UR - http://dx.doi.org/10.1002/admt.201900511
KW - e-textiles
KW - flexible electronics
KW - inkjet printing
KW - stretchable biometric sensors
KW - wearable electronics
ER -
TY - JOUR
TI - Evaluation of a Chitosan Hemostat in a Porcine Laparoscopic Partial Nephrectomy Model: A Pilot Study
AU - Crofton, Andrew
AU - Baldwin, Duane
AU - Alsyouf, Muhannad
AU - Dopp, Matthew
AU - Faaborg, Daniel
AU - Myklak, Kristine
AU - Arenas, Javier
AU - Khater, Nazih
AU - Hudson, Samuel
AU - Oberg, Kerby C.
AU - Kirsch, Wolff M.
T2 - JOURNAL OF ENDOUROLOGY
AB - Background and Objective: The ideal hemostatic agent for laparoscopic partial nephrectomy (LPN) would provide complete hemostasis and sealing of the collecting system at a low cost. Chitosan (CS) is an established topical hemostatic agent, but standard sterilization techniques affect its functional and biologic properties, thereby preventing parenteral uses. This study sought to characterize the safety and efficacy of an implanted CS hemostat sterilized with either a standard technique, electron beam (e-beam) irradiation, or a novel technique, nonthermal nitrogen plasma, in a porcine LPN model. Methods: Laparoscopic partial nephrectomies were performed on six farm pigs and hemostasis achieved using only a CS hemostatic agent (Clo-Sur P.A.D.) that was e-beam (n = 3) or plasma sterilized (PS) (n = 3). Number of pads needed to achieve hemostasis, estimated blood loss, operative time, mass of kidney resection, and warm ischemia time were measured. Animals were monitored for 14 weeks and at harvest, retrograde ureteropyelography and histologic analysis were performed. Results: Complete hemostasis and collection system sealing were achieved in both groups. There was a trend toward less pads required for hemostasis (p = 0.056) and reduced blood loss (p = 0.096) with PS pads, although this did not achieve statistical significance. No complications were observed for 14 weeks and gross examination showed the implanted CS was encapsulated in a fibrous capsule. Histologic analysis revealed a healed nephrectomy site with residual CS and associated chronic inflammation, reactive fibrosis, and foreign body giant cell formation. Importantly, the adjacent renal tissue was intact and viable with no residual parenchymal inflammation or cytologic damage. Conclusion: CS pads alone provided safe and effective hemostasis in a porcine LPN model. PS may enhance hemostatic efficacy and resorption compared with e-beam.
DA - 2019/11/1/
PY - 2019/11/1/
DO - 10.1089/end.2018.0801
VL - 33
IS - 11
SP - 887-894
SN - 1557-900X
KW - chitosan
KW - plasma sterilization
KW - hemostasis
KW - hemostatic agents
KW - nonthermal nitrogen plasma
KW - laparoscopic partial nephrectomy
KW - LPN
KW - electron beam
KW - e-beam
ER -
TY - JOUR
TI - Nonwovens-Structure-process-property relationships
AU - Pourdeyhimi, Behnam
AU - Maze, Benoit
AU - Farukh, Farukh
AU - Silberschmidt, Vadim V.
T2 - STRUCTURE AND MECHANICS OF TEXTILE FIBRE ASSEMBLIES, 2ND EDITION
AB - The definition of nonwovens is even more complicated. The term nonwoven refers to web-like assemblages of fibers wherein fiber-to-fiber bonding replaces twisting and interlacing. We define a nonwoven as an engineered fabric structure that may contain fibrous and nonfibrous elements and that is often manufactured directly from fibers or filaments and may incorporate other types of fabrics. The difference primarily between a nonwoven and its more traditional counterparts (woven, knitted, and braided structures) is the structure. The fibers or filaments in a nonwoven are not interlaced or interlooped and are somewhat random layered assemblies of fibers held together by a variety of different means. The structure of a nonwoven is defined, therefore, as its fiber orientation distribution function (ODF). Another structural aspect important to consider is the basis weight (mass per unit area—g/m2 or more commonly referred to as gsm) and its uniformity. While ODF may dictate behavior, basis weight uniformity dictates failure. The structure-property relationships in a nonwoven cannot be decoupled from the process utilized to form the nonwoven. Therefore, below, we present a short review of the processes employed in the making of nonwovens followed by a discussion of the structure-process-property relationships and will make an attempt to describe the mechanical properties of one class of nonwovens.
DA - 2019///
PY - 2019///
DO - 10.1016/B978-0-08-102619-9.00004-3
SP - 109-143
ER -
TY - JOUR
TI - Coating and laminating processes and techniques for textiles
AU - Shim, E.
T2 - SMART TEXTILE COATINGS AND LAMINATES, 2ND EDITION
AB - Coating and laminating are an essential part of highly functional and technical textile developments. This chapter discusses general features of coating and laminating process and materials preparations. It also introduces the basic concept of adhesion in the multilayer structure production. Then, the chapter reviews different techniques used to produce coated and laminated fabrics.
DA - 2019///
PY - 2019///
DO - 10.1016/B978-0-08-102428-7.00002-X
SP - 11-45
ER -
TY - JOUR
TI - Auxetic deformation of the weft-knitted Miura-ori fold
AU - Luan, Kun
AU - West, Andre
AU - DenHartog, Emiel
AU - McCord, Marian
T2 - Textile Research Journal
AB - Negative Poisson’s ratio (NPR) material with unique geometry is rare in nature and has an auxetic response under strain in a specific direction. With this unique property, this type of material is significantly promising in many specific application fields. The curling structure commonly exists in knitted products due to the unbalanced force inside a knit loop. Thus, knitted fabric is an ideal candidate to mimic natural NPR materials, since it possesses such an inherent curly configuration and the flexibility to design and process. In this work, a weft-knitted Miura-ori fold (WMF) fabric was produced that creates a self-folding three-dimensional structure with NPR performance. Also, a finite element analysis model was developed to simulate the structural auxetic response to understand the deformation mechanism of hierarchical thread-based auxetic fabrics. The simulated strain–force curves of four WMF fabrics quantitatively agree with our experimental results. The auxetic morphologies, Poisson’s ratio and damping capacity were discussed, revealing the deformation mechanism of the WMF fabrics. This study thus provides a fundamental framework for mechanical-stimulating textiles. The developed NPR knitted fabrics have a high potential to be employed in areas of tissue engineering, such as artificial blood vessels and artificial folding mucosa.
DA - 2019/9/23/
PY - 2019/9/23/
DO - 10.1177/0040517519877468
VL - 90
IS - 5-6
SP - 617-630
J2 - Textile Research Journal
LA - en
OP -
SN - 0040-5175 1746-7748
UR - http://dx.doi.org/10.1177/0040517519877468
DB - Crossref
KW - negative Poisson's ratio
KW - auxetic structure
KW - knitted fabric
KW - finite element analysis
KW - curling
ER -
TY - JOUR
TI - Hydroentangled polymer nonwovens: Prediction of jet streaks and surface roughness
AU - Li, Gen
AU - Sankaran, Abhilash
AU - Yarin, Alexander L.
AU - Pourdeyhimi, Behnam
T2 - POLYMER
AB - Here, the dynamic model of polymer fibers in hydroentanglement is used to predict the appearance of the so-called jet streaks and surface roughness. The mechanism of formation of jet streaks is explained. It is shown that the staggered two-row water jets which are widely used in industry help to optimize surface roughness and reduce the jet streaks. It is also shown that the jet width ratio plays an important role in minimizing the surface roughness at different jet pressures. Furthermore, a novel numerical method of re-construction of the 3-D surface topography from discrete data is developed to visualize the jet streaks. Also, in the experiments of this work, the optical images of jet streaks on hydroentangled polymer nonwovens are analyzed. The streaks period is measured by using the Fast Fourier Transform (FFT) and the surface topography is visualized by using optical profilometer. The predicted optimal jet width ratio is compared to the experimental results and a good agreement is found.
DA - 2019/10/10/
PY - 2019/10/10/
DO - 10.1016/j.polymer.2019.121731
VL - 180
SP -
SN - 1873-2291
KW - Hydroentangled polymer nonwovens
KW - Jet streaks
KW - Roughness
ER -
TY - JOUR
TI - Effect of Composition on the Molecular Dynamics of Biodegradable Isotactic Polypropylene/Thermoplastic Starch Blends
AU - Wozniak-Braszak, Aneta
AU - Knitter, Monika
AU - Markiewicz, Ewa
AU - Ingram, Wade F.
AU - Spontak, Richard J.
T2 - ACS SUSTAINABLE CHEMISTRY & ENGINEERING
AB - Polyolefins such as polypropylene are used in an immensely broad range of commodity products and account for the largest volume of synthetic polymers generated worldwide. For this reason, this family of thermoplastics contributes significantly to solid waste both on land and in the ocean. One viable approach to mitigate this growing problem and simultaneously reduce the cost of and dependence on petroleum-based polymers relies on blends wherein an added biopolymer can promote natural biodegradation. Due to their chemical dissimilarity, however, nonpolar polyolefins and polar biopolymers tend to phase-separate, in which case a fundamental, molecular-level understanding of the role of polymer/polymer interfaces on chain mobility in blends differing in composition is needed. In the present study, the molecular dynamics of blends composed of isotactic polypropylene (iPP) and glycerol-plasticized thermoplastic starch (TPS) are investigated by solid-state proton nuclear magnetic resonance and dielectric relaxation spectroscopies. Blends prepared by twin-screw extrusion range in composition from 10 to 70 wt % TPS, and their morphologies and thermal properties are examined by scanning electron microscopy and differential scanning calorimetry, respectively. This comparative analysis establishes the influence of TPS on the molecular dynamics of biphasic iPP/TPS blends relative to the constituent homopolymers.
DA - 2019/10/7/
PY - 2019/10/7/
DO - 10.1021/acssuschemeng.9b02774
VL - 7
IS - 19
SP - 16050-16059
SN - 2168-0485
KW - NMR spectroscopy
KW - dielectric relaxation
KW - polymer dynamics
KW - chain relaxation
KW - polymer blends
ER -
TY - JOUR
TI - Easy-to-use correlations to estimate droplet mobility on hydrophobic fibrous coatings
AU - Jamali, M.
AU - Tafreshi, H. Vahedi
AU - Pourdeyhimi, B.
T2 - COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
AB - While a water droplet beads up on a hydrophobic fibrous surface, it does not necessarily detach or move on the surface under its own weight. The underlying physics of droplet adhesion to a rough surface is very complicated, and the ability to engineer a fibrous texture that promotes or prevents droplet mobility for droplets of different liquids has been a long-standing challenge. In this concern, the current work is devised to develop easy-to-use correlations for the force needed to detach a droplet from a hydrophobic fibrous coating in the in-plane and out-of-plane directions. These correlations are obtained by first writing an equation for the balance of forces acting on a detaching droplet in terms of its geometrical dimensions at the moment of detachment, and then relating these dimensions to those in the absence of an external force via curve fitting to a series of computational data. These easy-to-use correlations only require the physical properties of the fibrous coatings (e.g., fiber diameter, fiber spacing, and fiber contact angle) and the droplets (e.g., volume and surface tension) as inputs, and they can therefore be used to optimize the surface geometry prior to manufacturing. To examine their accuracy, predictions of these correlations are compared to experimental data obtained for droplet detachment from fibrous mats with fibers having a diameter of about two orders of magnitude smaller than those considered in developing the correlations.
DA - 2019/12/5/
PY - 2019/12/5/
DO - 10.1016/j.colsurfa.2019.123867
VL - 582
SP -
SN - 1873-4359
KW - Droplet mobility
KW - Electrospun polystyrene
KW - Hydrophobic surface
KW - Fibrous surface
KW - Simulation
KW - Ferrofluid droplet
ER -
TY - JOUR
TI - Approach to Waterless Dyeing of Textile Substrates-Use of Atmospheric Plasma
AU - Zaidy, Syed S. H.
AU - Vacchi, Francine I.
AU - Umbuzeiro, Gisela A.
AU - Freeman, Harold S.
T2 - INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
AB - The international textile wet processing industry produces large amounts of wastewater, which if discharged into the environment could have adverse effects on aquatic life and drinking water. Efforts to reduce wastewater production include the development of chemical finishing technology that employs atmospheric plasma to apply repellent finishes to textile fibers. With this in mind, the use of atmospheric plasma technology to apply dyes to textile fibers was examined in the present study, as no water is needed for the dyeing process. Our work involved the design and synthesis of suitable dyes for waterless technology and examination of their utility for dyeing cotton, nylon, and polyester (PET). Results indicated that the obtained azo dyes having one or two acrylate groups gave good bonding to and good technical properties on cotton, nylon, or PET following spray application and plasma treatment. Dyes that worked best were also nonmutagenic in the Ames test.
DA - 2019/10/9/
PY - 2019/10/9/
DO - 10.1021/acs.iecr.9b01260
VL - 58
IS - 40
SP - 18478-18487
SN - 0888-5885
ER -
TY - JOUR
TI - Degradation studies of CI Reactive Blue 19 on biodegraded cellulosic fabrics via liquid chromatography-photodiode array detection coupled to high resolution mass spectrometry
AU - Sultana, Nadia
AU - Williams, Kelsey
AU - Ankeny, Mary
AU - Vinueza, Nelson R.
T2 - COLORATION TECHNOLOGY
AB - Abstract When textile substrates biodegrade in landfills, the fate of textile colorants is unknown, and potentially poses an ecotoxic threat. In this study, we developed a systematic analytical method to evaluate the biodegradation of reactive dyes, the most common class of dye applied to cotton fabrics. The cotton fabrics were dyed with CI Reactive Blue 19 and biodegraded in soil in a laboratory‐controlled environment over intervals of 45 and 90 days. A dye isolation method using a low concentration of alkali (0.15% sodium hydroxide) was developed and applied (80°C for 1 hour) to isolate intact and degraded dye from the fabric samples. To quantify the intact dye isolated from the fabric samples, a quantification method was then developed using liquid chromatography‐photodiode array detection. The quantification method provided excellent linearity ( R 2 = 0.9997 ± 0.0002), accuracy (% error = −2% ± 4), precision (% coefficient of variation = 2% ± 4) and sensitivity (lower limit of quantification = 0.4 ± 0.2 µg/mL) for concentrations ranging from 1 to 50 µg/mL. After validation, the method was applied and showed a reduction of dye in biodegraded samples (after 45 and 90 days) compared with undegraded control samples (0 days). To characterise the isolated dye degradation product, quadrupole time‐of‐flight tandem mass spectrometry was utilised. Analysis showed that the degradation product was formed by losing a group from the intact hydrolysed form of the dye, creating a more hydrophobic degradation product compared with the intact hydrolysed form of dye.
DA - 2019/12//
PY - 2019/12//
DO - 10.1111/cote.12440
VL - 135
IS - 6
SP - 475-483
SN - 1478-4408
ER -
TY - JOUR
TI - Preparation and Characterization of Chitosan-Alginate Polyelectrolyte Complexes Loaded with Antibacterial Thyme Oil Nanoemulsions
AU - Hamedi, Hamid
AU - Moradi, Sara
AU - Tonelli, Alan E.
AU - Hudson, Samuel M.
T2 - APPLIED SCIENCES-BASEL
AB - Biomedical industries are attempting to utilize natural materials, as they are bio-compatible, non-toxic, and show bioactive properties, like antimicrobial activity. In this study, natural polyelectrolyte complexed chitosan/alginate films (PECs) were prepared via a casting/solvent evaporation technique, and their characteristics and drug release properties were investigated. PEC films made with two different overall polymer contents, 0.4 and 1 w/v%, were loaded with thyme oil nanoemulsion as drug carrier. The structure of the films was studied by FTIR and optical and scanning electron microscopy. Prepared PEC films had good mechanical and water vapor permeability properties. Release of the thyme oil from the pH-sensitive PEC films (TM-PEC) was detected and followed by UV spectroscopy. The results indicated that the drug release rate of TM-PEC films was the fastest when the chitosan content was 1 %w/v, and various mathematical models were analyzed for investigating the drug release mechanism. Antibacterial tests were performed by counting the number of surviving gram-negative and gram-positive bacteria. The in vitro test indicated the limitation Escherichia coli (E. coli) and Staphylococcus aureus (S.aureus) growth in the presence of TM-PEC films. The MTT test showed more cell viability of the TM-PEC film in comparison with that of the PEC film without TM. Based on the measured physical and antibacterial properties, the chitosan–alginate PEC films loaded with antibacterial essential oils can be considered for biomedical applications, such as wound dressings or controlled release systems.
DA - 2019/9//
PY - 2019/9//
DO - 10.3390/app9183933
VL - 9
IS - 18
SP -
SN - 2076-3417
KW - polyelectrolyte complex
KW - chitosan
KW - alginate
KW - thyme oil nanoemulsion
KW - biomedical applications
ER -
TY - JOUR
TI - Mechanical properties of PTT fibers by sustainable horizontal isothermal bath process
AU - Najafi, Mesbah
AU - Kotek, Richard
T2 - SN APPLIED SCIENCES
AB - The melt spinning process of poly (trimethylene terephthalate) was modified by the inclusion of horizontal isothermal bath (HIB) in the extrusion line. Several parameters including liquid depth, liquid temperature, and take-up speed were utilized in this study. The structural and mechanical properties of the fibers were characterized by DSC, X-ray, SEM, optical birefringence, and tensile testing. The results showed that the bath treatment increased considerably the fiber birefringence up to 0.066 by 66% and increased the crystallinity up to 47.94% by 100% compared to the control (no HIB) fibers. Drawing the HIB fibers with a low draw ratio (DR) of 1.11 increased the tensile strength up to 4.76 g/d and reduced the tensile strain down to 51.76%. Such strength is greater than the maximum value of 3.3 g/d reported before. The obtained results can widen application of PTT fibers in technical woven/nonwoven fiber products.
DA - 2019/10//
PY - 2019/10//
DO - 10.1007/s42452-019-1198-5
VL - 1
IS - 10
SP -
SN - 2523-3971
KW - Poly(trimethylene terephthalate)
KW - Horizontal isothermal bath (HIB)
KW - Melt spinning process
KW - Fiber tensile strength
KW - Compact fibrillar morphology
KW - Molecular orientation
ER -
TY - JOUR
TI - Towards a reliable prediction of the aquatic toxicity of dyes
AU - Umbuzeiro, Gisela de A.
AU - Albuquerque, Anjaina F.
AU - Vacchi, Francine I
AU - Szymczyk, Malgorzata
AU - Sui, Xinyi
AU - Aalizadeh, Reza
AU - Ohe, Peter C.
AU - Thomaidis, Nikolaos S.
AU - Vinueza, Nelson R.
AU - Freeman, Harold S.
T2 - ENVIRONMENTAL SCIENCES EUROPE
AB - Abstract Background The Max Weaver Dye Library (MWDL) from North Carolina State University is a repository of around 98,000 synthetic dyes. Historically, the uses for these dyes included the coloration of textiles, paper, packaging, cosmetic and household products. However, little is reported about their ecotoxicological properties. It is anticipated that prediction models could be used to help provide this type information. Thus, the purpose of this work was to determine whether a recently developed QSAR (quantitative structure–activity relationships) model, based on ACO-SVM techniques, would be suitable for this purpose. Results We selected a representative subset of the MWDL, composed of 15 dyes, for testing under controlled conditions. First, the molecular structure and purity of each dye was confirmed, followed by predictions of their solubility and pKa to set up the appropriate test conditions. Only ten of the 15 dyes showed acute toxicity in Daphnia, with EC 50 values ranging from 0.35 to 2.95 mg L −1 . These values were then used to determine the ability of the ACO-SVM model to predict the aquatic toxicity. In this regard, we observed a good prediction capacity for the 10 dyes, with 90% of deviations within one order of magnitude. The reasons for this outcome were probably the high quality of the experimental data, the consideration of solubility limitations, as well as the high purity and confirmed chemical structures of the tested dyes. We were not able to verify the ability of the model to predict the toxicity of the remaining 5 dyes, because it was not possible to determine their EC 50 . Conclusions We observed a good prediction capacity for the 10 of the 15 tested dyes of the MWDL, but more dyes should be tested to extend the existing training set with similar dyes, to obtain a reliable prediction model that is applicable to the full MWDL.
DA - 2019/12//
PY - 2019/12//
DO - 10.1186/s12302-019-0258-1
VL - 31
IS - 1
SP -
SN - 2190-4715
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85074502142&partnerID=MN8TOARS
KW - Azo dyes
KW - Anthraquinone dyes
KW - ACO-SVM model
KW - QSAR
KW - MWDL
KW - Daphnia
ER -
TY - JOUR
TI - Electrostatic Assembly of a Titanium Dioxide@Hydrophilic Poly(phenylene sulfide) Porous Membrane with Enhanced Wetting Selectivity for Separation of Strongly Corrosive Oil-Water Emulsions
AU - Han, Na
AU - Yang, Chao
AU - Zhang, Zongxuan
AU - Wang, Weijing
AU - Zhang, Wenxin
AU - Han, Changye
AU - Cui, Zhenyu
AU - Li, Wei
AU - Zhang, Xingxiang
T2 - ACS APPLIED MATERIALS & INTERFACES
AB - The efficient treatment of oil–water emulsions in extreme environments, such as strongly acidic and alkaline media, remains a widespread concern. Poly(phenylene sulfide) (PPS)-based porous membranes with excellent resistance to chemicals and solvents are promising for settling this challenge. However, the limited hydrophilicity and the poor hydrated ability of the hydrophilic PPS (h-PPS) membranes reported in the literature prevents them from separating oil–water emulsions with high efficiency, large fluxes, and good antifouling performances. In this study, a firm rough TiO2 layer is constructed on a h-PPS membrane via electrostatic assembly to improve the surface hydrophilization. The introduction of the TiO2 layer increases the wetting selectivity and decreases the oil adhesion, which makes it capable to efficiently treat oil-in-water emulsions (efficiency > 98%). Most importantly, the underwater critical oil intrusion pressure almost doubled after the incorporation of the TiO2 layer, which allows the membrane to withstand pressurized filtration, achieving a high flux of ∼4000 L m–2 h–1. This is more than 2 orders of magnitude larger than the flux of the reported h-PPS. Furthermore, the TiO2@h-PPS membrane displays long-term stability in separating oil–water emulsions in strong acid and strong alkali, showing a promising prospect for the treatment of strongly corrosive emulsions.
DA - 2019/9/25/
PY - 2019/9/25/
DO - 10.1021/acsami.9b12252
VL - 11
IS - 38
SP - 35479-35487
SN - 1944-8252
KW - PPS
KW - membrane
KW - oil-water separation
KW - superhydrophilicity
KW - oil-in-water emulsion
KW - TiO2
ER -
TY - JOUR
TI - Binding Conductive Ink Initiatively and Strongly: Transparent and Thermally Stable Cellulose Nanopaper as a Promising Substrate for Flexible Electronics
T2 - ACS Applied Materials & Interfaces
AB - For flexible electronics, the substrates play key roles in ensuring their performance. However, most substrates suffer from weak bonding with the conductive ink and need additional aids. Here, inspired by the Ag–S bond theory, a novel cellulose nanopaper substrate is presented to improve the bond strength with the Ag nanoparticle ink through a facile printing method. The substrate is fabricated using thiol-modified nanofibrillated cellulose and exhibits excellent optical properties (∼85%@550 nm), ultra-small surface roughness (3.47 nm), and high thermal dimensional stability (up to at least 90 °C). Most importantly, it can attract Ag nanoparticles initiatively and bind them firmly, which enable the conductive ink to be printed without using the ink binder and form a strong substrate–ink bonding and maintain a stable conductivity of 2 × 10–4 Ω cm even after extensive peeling and bending. This work may lead to exploring new opportunities to fabricate high-performance flexible electronics using the newly developed nanopaper substrate.
DA - 2019///
PY - 2019///
DO - 10.1021/ACSAMI.9B04596
UR - https://publons.com/publon/14480246/
KW - Ag-S bond
KW - silver nanoparticles
KW - nanofibrillated cellulose
KW - nanopaper
KW - flexible electronics
ER -
TY - JOUR
TI - Orientation-specific switching of inelastic electron tunneling in an oxygen-pyridine complex adsorbed onto an Ag(110) surface
AU - Jang, Sanghoon
AU - Shin, Taeho
AU - Abbas, Hafiz Ghulam
AU - Hahn, Jae R.
AU - Kang, Hong Seok
T2 - JOURNAL OF CHEMICAL PHYSICS
AB - Here, we report the development of a molecular rotary switch (a “stator–rotor” consisting of a single oxygen molecule as a stator and a single pyridine molecule as a rotor) on a silver surface. The pyridine molecule was bonded to the oxygen molecule and was found to rotate to enable “ON” or “OFF” vibrational conductance through the oxygen molecule. Four stable sites around the oxygen molecule were observed, and vibration conductance turned on and off depending on the site at which the pyridine molecule bonded. The spatially resolved mapping of the vibrational change revealed two locations of maximal vibration intensity, separated by ∼3 Å. These positions acted as two conducting channels. The two distinct vibrational energy levels were associated with the switching process. Adsorption-induced electron transfer between the silver layers and the molecules enhanced the local interactions between the molecules. The two vibration modes were excited by resonant tunneling despite substantial interactions between the molecules, which resulted in a decrease in tunneling conductance. An independent pathway exists for the vibrational excitation process by tunneling electrons and intermolecular interactions.
DA - 2019/9/21/
PY - 2019/9/21/
DO - 10.1063/1.5110545
VL - 151
IS - 11
SP -
SN - 1089-7690
ER -
TY - JOUR
TI - Improved Eco-Friendliness of a Common Flame Retardant through Inclusion Complexation with Cyclodextrins
AU - Zhang, Nanshan
AU - Yildirim, Erol
AU - Zane, Cody P.
AU - Shen, Jialong
AU - Vinueza, Nelson
AU - Hinks, David
AU - Tonelli, Alan E.
AU - Pasquinelli, Melissa A.
T2 - ACS Applied Polymer Materials
AB - Triphenyl phosphate (TPP) is used as a plasticizer and a flame retardant worldwide. However, in recent years, TPP has been detected in indoor/outdoor air and biota at high concentrations, and exposure to TPP has been indicated as possibly leading to obesity and osteoporosis in humans. Cyclodextrins (CDs) are known to form inclusion complexes (ICs) with a wide variety of guests due to their ring/cavity structure. The capability of β-CD to form an IC with TPP was recently reported by us, and those studies also revealed that poly(ethylene terephthalate) surfaces treated with TPP−β-CD ICs performed effectively as a flame retardant while also reducing the amount of TPP needed for flame retardancy by at least a factor of 10. Thus, the focus here is whether TPP can form stable ICs with other CDs. Quantum chemistry calculations reveal that IC formation with both α-CD and γ-CD is feasible. However, results from a series of characterization methods indicate that γ-CD forms stable ICs with TPP, but α-CD does not. In terms of the stability of these ICs, for γ-CD, differential scanning calorimetry reveals that the thermal stability of TPP increases via IC formation, and 1H NMR data indicate that the molar ratio of TPP to γ-CD is 1:2, which coincides with our previous work for IC formation with β-CD. In contrast, another previous study from our laboratories indicates that CD ICs in aqueous solution possess a 1:1 stoichiometry for both β-CD and γ-CD. Quantum chemistry calculations suggest that different ratios were observed due to one of the CDs being more weakly bound and thus able to disassociate under certain conditions. Molecular dynamics simulations indicate that TPP is only released from the ICs with both stoichiometries at temperatures above the degradation temperature of CDs. Thus, these studies suggest that ICs with the common flame retardant TPP and both β-CD and γ-CD are stable under normal conditions and that IC formation enables the unnecessary release of the flame retardant during use to be avoided. Therefore, forming ICs prior to treatment on polymer substrates with flame retardants like TPP that are known to have health and environmental risks is an eco-friendly alternative to current treatment practices.
DA - 2019/10/11/
PY - 2019/10/11/
DO - 10.1021/acsapm.9b00708
VL - 1
IS - 10
SP - 2768-2777
UR - https://doi.org/10.1021/acsapm.9b00708
KW - flame retardant (FR)
KW - triphenyl phosphate (TPP)
KW - cyclodextrin (CD)
KW - inclusion complex (IC)
KW - molecular modeling
ER -
TY - JOUR
TI - Bioinspired Bistable Soft Actuators
AU - Wei, S.
AU - Shao, H.
AU - Ghosh, T. K.
T2 - ELECTROACTIVE POLYMER ACTUATORS AND DEVICES (EAPAD) XXI
AB - DEAs have been studied for decades as a potential polymer artificial muscle for its excellent mechanical properties and large electric field-induced strains. The structural design of DEAs enhances the actuator performances and converts the electrically–controlled strain to diverse motions including linear motion, bending, twisting and moving with multiple degree of freedom. Inspired by the Venus Flytrap (VFT), whose bistable leaves and local strain redistribution are crucial to the fast closure speed, we developed cylindrically-curved bistable laminated DEAs, and activated the bistable shape transformation by electrically tuning the strain field. To obtain the bistable structure, two elastomeric films are prestrained biaxially and bonded orthogonally to a stiffer elastic film in the middle. Due to the elastic energy minimization, the originally flat laminate immediately self-equilibrated to two bistable cylindrical shapes, with the curvatures orthogonal to each other. Basic theoretical analyses on the interaction of prestrains and bending curvatures provide guidance to the design of bistable morphing shapes. The prestrains on the DE films not only generate various curved shapes, but also decreases the film thickness and therefore reduces the actuation voltage. Similar to the fast closure of VFT, which is activated by the strain redistribution resulted from the motor cell enlargement, our bistable DEA achieves reversible bistable shape transformation by voltage-induced strain change at the area covered by compliant electrodes.
DA - 2019///
PY - 2019///
DO - 10.1117/12.2522123
VL - 10966
SP -
SN - 1996-756X
KW - Bioinspired
KW - bistable
KW - dielectric elastomer
ER -
TY - JOUR
TI - Effect of amino, hydroxyl, and carboxyl terminal groups of alkyl chains of self-assembled monolayers on the adsorption pattern of gold nanoparticles
AU - Zahid, Ali A. S. M.
AU - Hanif, Md. A.
AU - Lee, Insup
AU - Islam, Md. Akherul
AU - Hahn, Jae R.
T2 - SURFACE AND INTERFACE ANALYSIS
AB - The adsorption pattern of gold nanoparticles (AuNPs) on functionalized self‐assembled monolayers (SAMs) produced on a Au(111) surface was characterized. The Au(111) was modified with 11‐amino‐1‐undecanethiol hydrochloride (AUT), 11‐mercapto‐1‐undecanol (MUT), or 11‐mercaptoundecanoic acid (MUA) at an elevated temperature and pressure. The AuNPs aggregated on the AUT‐SAM surface, whereas they were well dispersed on the MUT‐SAM surface and localized on the MUA‐SAM surface. The results suggest that interactions between AuNPs differ according to the degree of peeling of citrate‐layer‐capped AuNPs. The degree of peeling, which is related to both the surface randomness of the SAMs and the functional characteristics of the terminal group of each SAM, was discussed on the basis of scanning tunneling microscopy observations, X‐ray photoelectron spectroscopic analyses, and contact angle measurements. Our study shows that AuNP patterns can be controlled by changing the terminal group of the alkyl thiol SAM on a Au(111) surface.
DA - 2019/11//
PY - 2019/11//
DO - 10.1002/sia.6697
VL - 51
IS - 11
SP - 1102-1112
SN - 1096-9918
KW - adsorption
KW - gold nanoparticles
KW - scanning tunneling microscopy
KW - self-assembled monolayers
KW - terminal groups
KW - X-ray photoelectron spectroscopy
ER -
TY - JOUR
TI - Microfiber Nonwovens as Potential Membranes
AU - Kiyak, Yasar
AU - Maze, Benoit
AU - Pourdeyhimi, Behnam
T2 - SEPARATION AND PURIFICATION REVIEWS
AB - This article provides an overview of the membrane bioreactor technology where nonwovens can be applied as an alternative medium for separation. The main objective is to identify the nonwoven characteristics leading to higher removal efficiency, higher flux, and lower fouling behavior. The general limitations associated with common nonwoven separation media are related to the large pore and wide pore size distributions. Consequently, due to their large pore network, nonwovens often behave as a depth filter structure. Common nonwovens having large fibers cannot replace microfiltration membranes yet. Further refinements of these structures are necessary for developing a suitable replacement.
DA - 2019///
PY - 2019///
DO - 10.1080/15422119.2018.1479968
VL - 48
IS - 4
SP - 282–297
KW - Nonwoven
KW - separation
KW - filtration
KW - fouling
KW - membrane
KW - wastewater treatment
KW - biofouling
ER -
TY - JOUR
TI - BODIPY-embedded electrospun materials in antimicrobial photodynamic inactivation
AU - Stoll, Kevin R.
AU - Scholle, Frank
AU - Zhu, Jiadeng
AU - Zhang, Xiangwu
AU - Ghiladi, Reza A.
T2 - PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
DA - 2019/8/1/
PY - 2019/8/1/
DO - 10.1039/c9pp00103d
VL - 18
IS - 8
SP - 1923-1932
SN - 1474-9092
UR - https://publons.com/publon/26924633/
ER -
TY - JOUR
TI - Chitosan nanoparticles: Polyphosphates cross-linking and protein delivery properties
AU - Abdelgawad, Abdelrahman M.
AU - Hudson, Samuel M.
T2 - INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
AB - Nanoparticles from chitosan, in general, can be prepared through ionotropic gelation, physical crosslinking, with anionic polyphosphates. Tripolyphosphate (TPP) is widely used for such purpose especially in drug delivery applications. TPP is a small ion with a triple negative charge throughout the physiologically acceptable pH range. However, the stability of size and surface charge of the particles still challenging. In the current work, the utilization of Hexametaphosphate (HMP) instead of Tripolyphosphate (TPP) as a cross-linking agent is being investigated. HMP is hexavalent molecule in the neutral and slightly basic medium which offers more binding sites readily available for interaction with chitosan. It is thought that increasing the availability of the binding sites in the HMP molecule would result in stronger ionic complexation with chitosan cationic charges. Consequently, such stronger binding improves particles' stability and lead to average size reduction. A comparative study between chitosan/TPP and chitosan/HMP nanoparticles under different complexation conditions was conducted to investigate the effect of HMP on nanoparticles formation. Bovine Serum Albumin (BSA) was applied as a protein model drug to explore the drug loading efficiency, 96.3%, is higher than its TPP, 91.87%, counterparts. However, TPP cross-linked particles showed superior stability upon storage.
DA - 2019/9/1/
PY - 2019/9/1/
DO - 10.1016/j.ijbiomac.2019.06.062
VL - 136
SP - 133-142
SN - 1879-0003
KW - Chitosan
KW - Hexametaphosphate
KW - Drug delivery
ER -
TY - JOUR
TI - Amphiphilic cellulose for enhancing the antifouling and separation performances of poly (acrylonitrile-co-methyl acrylate) ultrafiltration membrane
AU - Han, Na
AU - Zhang, Wenxin
AU - Wang, Weijing
AU - Yang, Chao
AU - Tan, Linli
AU - Cui, Zhenyu
AU - Li, Wei
AU - Zhang, Xingxiang
T2 - JOURNAL OF MEMBRANE SCIENCE
AB - Membrane fouling results in short membrane life and high operating costs, which is a major obstacle in membrane filtration technology. Here, an amphiphilic cellulose (MCC-C16) was synthesized and used as an additive to mix with poly (acrylonitrile-co-methyl acrylate) (P(AN-MA)) copolymer. P(AN-MA)/MCC-C16 composite membranes were formed via non-solvent induced phase separation, which exhibited excellent antifouling ability, hydrophilicity, and permeability compared with the control sample P(AN-MA) membrane. The P(AN-MA)/MCC-C16 composite membranes exhibited higher pure water flux, bovine serum albumin (BSA) flux, and flux recovery rate (FRR) than those of the pristine membrane when 5 wt% MCC-C16 was added. The pure water flux increased from 284 to 459 L/m2 h, BSA rejection was up to 95.2%, and the highest flux recovery ratio was up to 86.7%. The lowest irreversible fouling was depressed to 13.5% after three cycles of permeation. MCC-C16 is valuable in fabricating PAN-based ultrafiltration membranes for water treatment and is low cost, and environmentally friendly with excellent antifouling performance.
DA - 2019/12/1/
PY - 2019/12/1/
DO - 10.1016/j.memsci.2019.117276
VL - 591
SP -
SN - 1873-3123
KW - P(AN-MA)
KW - Composite membranes
KW - Amphiphilic cellulose
KW - Antifouling
KW - Separation
ER -
TY - JOUR
TI - Preparation and characterization of chitosan based hydrogels containing cyclodextrin inclusion compounds or nanoemulsions of thyme oil
AU - Moradi, Sara
AU - Barati, Abolfazl
AU - Salehi, Ehsan
AU - Tonelli, Alan E.
AU - Hamedi, Hamid
T2 - POLYMER INTERNATIONAL
AB - Abstract Hydrogels derived from natural polysaccharides are ideal scaffolds for use in biomedical applications. pH‐sensitive polyvinyl alcohol and chitosan hydrogels containing inclusion compounds of thyme oil (TM) with host methyl‐β‐cyclodextrin (MβCD) and hydroxypropyl‐β‐cyclodextrin (HβCD) and TM nanoemulsion (TM‐nano) were prepared via controlled, biocompatible and low cost freeze–thaw method. The structure of the hydrogels was characterized by Fourier transform IR spectroscopy and optical and scanning electron microscopy. The physicochemical properties of the hydrogels such as gel fraction, swelling ratio and tensile properties were measured. The water vapor transmission rate of the hydrogels indicated that they can maintain a moist environment over the wound bed. Encapsulation and release of antibacterial TM from the hydrogels were determined by UV spectroscopy. In all cases, hydrogels with lower amounts of TM evidenced slower and more controlled release. Different kinetic models were applied for evaluating the drug release mechanism. The antibacterial activity of the samples was studied by counting the number of both Gram‐negative and Gram‐positive bacteria surviving in a broth medium and the results proved the antibacterial activity of all prepared hydrogels. The results of an MTT (3‐(4,5‐dimethylthiazol‐2yl)‐2,5‐diphenyltetrazolium bromide) assay indicated more cell viability of TM‐nano hydrogels in comparison with those of TM‐βCD inclusion compounds. Cell attachment observations also showed great biocompatibility of TM‐nano hydrogels. The prepared hydrogels, especially those containing TM‐nano, might be used as potential wound dressings to improve the wound healing process. © 2019 Society of Chemical Industry
DA - 2019/11//
PY - 2019/11//
DO - 10.1002/pi.5899
VL - 68
IS - 11
SP - 1891-1902
SN - 1097-0126
KW - wound dressings
KW - chitosan
KW - thyme oil nanoemulsions
KW - cyclodextrin inclusion compounds
KW - antibacterial activity
KW - drug delivery
ER -
TY - JOUR
TI - An Application of Lean Six Sigma in Cotton Yarn Dyeing
AU - Jasper, Warren J.
AU - Vidwans, Shirin
T2 - AATCC Review
DA - 2019/9/1/
PY - 2019/9/1/
DO - 10.14504/ar.19.5.3
VL - 19
IS - 5
SP - 44-48
J2 - aatcc rev
LA - en
OP -
SN - 1532-8813
UR - http://dx.doi.org/10.14504/ar.19.5.3
DB - Crossref
ER -
TY - JOUR
TI - AgNP/crystalline PANI/EBP-composite-based supercapacitor electrode with internal chemical interactions
AU - Kim, Hyungjoo
AU - Ramalingam, Manivannan
AU - Balakumar, Vellaichamy
AU - Zhang, Xiangwu
AU - Gao, Wei
AU - Son, Young-A
AU - Bradford, Philip D.
T2 - JOURNAL OF APPLIED POLYMER SCIENCE
AB - ABSTRACT In this article, polyaniline (PANI) was conformally coated on epoxide‐functionalized buckypaper (EBP). Because of the presence of epoxide functional groups, chemical interactions occurred between oxygen in the epoxide groups and NH in the PANI. These chemical interactions were identified by peak shifts and intensity changes in Raman spectra. Additionally, crystalline peaks were clearly observed through X‐ray diffraction. However, Raman peak changes or crystalline peaks were not observed in nonfunctionalized buckypaper (purified pristine buckypaper [PPBP])‐based composites. Both hydrogen bonding and crystalline nature of EBP‐PANI enhanced its electrical conductivity, producing a specific capacitance better than that of PPBP‐PANI. Finally, Ag nanoparticles (AgNPs) were applied to EBP‐PANI to further enhance its electrical conductivity. Owing to the presence of AgNPs and their interactions with the N in PANI, the specific capacitance of EBP‐PANI‐AgNP reached 915.62 F/g. These results emphasize the positive effect of chemical interactions and crystalline nature of EBP‐based composites on their electrochemical performance. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48164.
DA - 2019/11/20/
PY - 2019/11/20/
DO - 10.1002/app.48164
VL - 136
IS - 44
SP -
SN - 1097-4628
UR - https://publons.com/publon/26924632/
ER -
TY - JOUR
TI - The role of staple fiber length on the performance of carded, hydroentangled nonwovens produced with polypropylene fibers
AU - Tabor, Jordan
AU - Wust, Carl
AU - Pourdeyhimi, Behnam
T2 - JOURNAL OF ENGINEERED FIBERS AND FABRICS
AB - Carding is a common web-forming process used for staple fibers in the nonwovens industry. Staple fibers may be produced in many different lengths. However, the effect of staple fiber length on the nonwoven carding process and structure–property relationships of carded, hydroentangled nonwoven fabrics is not well understood. During this research, polypropylene fibers with lengths ranging from 2.54 to 15.24 cm were produced, carded, and bonded by hydroentangling. All fiber lengths used during this research were successfully carded. Fabrics were characterized via scanning electron microscopy analysis as well as basis weight, thickness, and solid volume fraction measurements. Fabric performance was evaluated with air permeability and burst strength testing. Data sets were statistically evaluated with one-way and two-way analysis of variance to determine whether fiber length significantly affected fabric structure and properties. In general, the fabrics’ solid volume fractions and burst strengths were not significantly affected by fiber length. However, air permeability of the samples did show significant change with fiber length.
DA - 2019/8/21/
PY - 2019/8/21/
DO - 10.1177/1558925019870058
VL - 14
SP -
SN - 1558-9250
KW - Carding
KW - fiber length
KW - polypropylene
KW - hydroentangling
KW - structure-property relationships
ER -
TY - JOUR
TI - Flexible polyaniline-carbon nanofiber supercapacitor electrodes
AU - Yanilmaz, Meltem
AU - Dirican, Mahmut
AU - Asiri, Abdullah M.
AU - Zhang, Xiangwu
T2 - JOURNAL OF ENERGY STORAGE
AB - Flexible polyaniline-carbon nanofiber (PANI-CNF) composites were fabricated and evaluated for use as supercapacitor electrodes. Sol-gel and electrospinning techniques were employed to produce flexible carbon nanofibers and polyaniline coating was applied via in-situ chemical polymerization to further improve the electrochemical properties of the electrodes. The performance of flexible PANI-CNF electrodes was investigated in symmetric supercapacitor cells. Results showed that binder-free flexible PANI-CNF electrodes had high capacitance of 234 F/g and excellent cycling stability with capacitance retention of about 90% after 1000 cycles. Ragone plots were also presented and a high energy density of 32 Wh/kg at the power density of 500 W/kg was achieved for the flexible PANI-CNF electrode prepared with 12 h polymerization. In addition, mechanical tests demonstrated that free-standing PANI-CNF electrodes were durable and highly flexible. Therefore, combining sol-gel and electrospinning techniques is a facile and effective way to achieve flexible carbon nanofiber electrodes and this work provides a new approach for designing flexible electrodes with exceptional electrochemical performance, which is very promising for practical application in the energy storage field.
DA - 2019/8//
PY - 2019/8//
DO - 10.1016/j.est.2019.100766
VL - 24
SP -
SN - 2352-152X
UR - https://publons.com/publon/22573151/
KW - Carbon nanofiber
KW - Polyaniline
KW - Composite
KW - Electrode
ER -
TY - JOUR
TI - Hybrid cross-linked hydrogels as a technology platform for in vitro release of cephradine
AU - Gull, Nafisa
AU - Khan, Shahzad Maqsood
AU - Butt, Muhammad Taqi Zahid
AU - Zia, Saba
AU - Khalid, Syed
AU - Islam, Atif
AU - Sajid, Imran
AU - Khan, Rafi Ullah
AU - King, Martin William
T2 - POLYMERS FOR ADVANCED TECHNOLOGIES
AB - Hydrogel‐based drug delivery systems can leverage therapeutically favorable upshots of drug release and found clinical uses. Hydrogels offer temporal and spatial control over the release of different therapeutic agents. Because of their tailor made controllable degradability, physical properties, and ability to prevent the labile drugs from degradation, hydrogels provide platform on which diverse physicochemical interactions with entrapped drugs cause to control drug release. Herein, we report the fabrication of novel vinyltrimethoxy silane (VTMS) cross‐linked chitosan/polyvinyl pyrrolidone hydrogels. Swelling in distilled water in conjunction with different buffer and electrolyte solutions was performed to assess the swellability of hydrogels. Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and X‐ray diffraction (XRD) analysis were further conducted to investigate the possible interactions between components, thermal stability, and crystallinity of as‐prepared hybrid hydrogels, respectively. In vitro time‐dependent biodegradability, antimicrobial study, and cytotoxicity were also carried out to evaluate their extensive biocompatibility and cytotoxic behavior. More interestingly, in vitro drug release study allowed for the controlled release of cephradine. Therefore, this facile strategy developed the novel biocompatible and biodegradable hybrid hydrogels, which could significantly expand the scope of these hydrogels in other biomedical applications like scaffolds, skin regeneration, tissue engineering, etc.
DA - 2019/9//
PY - 2019/9//
DO - 10.1002/pat.4688
VL - 30
IS - 9
SP - 2414-2424
SN - 1099-1581
KW - cephradine
KW - cross-linker
KW - drug release
KW - hybrid hydrogel
ER -
TY - JOUR
TI - Role of Electronic Structures and Dispersion Interactions in Adsorption Selectivity of Pyrimidine Molecules with a Si(5512) Surface
AU - Kim, Gyu-Hyeong
AU - Jeong, Sukmin
AU - Lee, Insup
AU - Abu Hanif, Md.
AU - Islam, Md. Akherul
AU - Sapkota, Kamal P.
AU - Hahn, Jae R.
T2 - JOURNAL OF PHYSICAL CHEMISTRY C
AB - We show that the resonance energy and dispersion interactions (DIs) are critical factors in determining the selectivity and configuration in the reaction of pyrimidine molecules with a silicon surface. The atomic structures of the pyrimidine molecules after they reacted with a Si(5 5 12)–2 × 1 surface were studied. Binding configurations of the pyrimidines were distinct from those of other molecules with N lone-pair electrons and aromaticity. The pyrimidine molecules were adsorbed to produce two σ bonds to silicon with N2 and C5 on the adatom row (Adr) and honeycomb chain (Hnc) sites and with C1 and C4 on the dimer row (Dmr) and the tetramer row (Ttr) sites. The reactions occurred via a [4 + 2]-type cycloaddition to produce planar-type configurations with loss of aromaticity. That is, the atoms of the aromatic ring of pyrimidine form chemical bonds with silicon atoms, which is in contrast to the adsorption behaviors reported for other N-containing aromatic molecules. When pyrimidine is adsorbed, its molecular orbitals are distorted because the N–Si bond axis does not coincide with the molecular orbital symmetric axis. Therefore, the vertical geometry is relatively unstable. DIs contribute a range of 0.4–0.6 eV for all stable adsorption structures and are essential for producing planar-type configurations on the Dmr and Ttr sites. In the absence of DIs, the vertical structure is stable; however, when DIs are included, the planar-type configuration becomes more stable. Moreover, even though the aromaticity is stabilized in the vertical structure, the greater adsorption energy for the flat structure of pyrimidine is mainly attributed to the lower energy cost involved in breaking the aromaticity.
DA - 2019/8/15/
PY - 2019/8/15/
DO - 10.1021/acs.jpcc.9b03520
VL - 123
IS - 32
SP - 19506-19512
SN - 1932-7455
ER -
TY - JOUR
TI - Exertional Strain and Task Performance Consequences of a Reduction in Protection in Structural Fire Fighter PPE - A Pilot Study
AU - DenHartog, Emiel A.
T2 - MEDICINE AND SCIENCE IN SPORTS AND EXERCISE
AB - PURPOSE: A major concern for working in structural firefighter PPE is the heat strain that is caused by the heat protection it provides. This is a multi-faceted challenge that requires studying heat protection, firefighter strain and task performance. To initialize this a pilot study on the consequences of reducing firefighter heat and flame protection on thermal strain, task performance and overall experiences of user safety was conducted at a firefighter training facility in The Netherlands. METHODS: Ten experienced firefighters between the ages of 25 and 50 participated in a protocol approved by the local ethical committee. They performed a simulated rescue of two dummies in a small kitchen fire in a current structural firefighters garment (S) and in a one layer FR coverall with Reduced protection (R), both with full safety gear, including SCBA. Measurements were conducted on heart rate, skin temperatures (4 sites), core temperature, task performance (speed, rescue result), mood and comfort sensations. RESULTS: In all conditions all firefighters were able to execute the rescue in the R-gear as well as in the S-gear with no differences in time, on average 8.5 min. There were significant reductions in heart rate in the R-gear versus the S-gear (p=0.02) and in core temperature increase: 1.69 (0.80 °C/hr) in R-gear versus 2.52 (1.20) °C/hr in S-gear (p=0.04). Mean skin temperature was slightly higher in the R-gear, possibly due to the reduction in protection (35.1°C (R) versus 34.3°C (S), p=0.009). But it did not reach dangerous levels, none of the maximum skin temperatures was higher than 37°C. Comfort and strain ratings were lower in the R-gear, but there was an increase in the R-gear just prior to entering the room with the fire. CONCLUSIONS: This pilot study addressed multiple aspects of the balance strain, protection and performance, all crucial to ensure safety and health for structural firefighters. The results showed that a small fire scenario could be addressed by the gear as effectively as the current gear, which was unexpected. The R-gear is expected to further reduce strain in most of the firefighter day-to-day work activities. The results also indicated that experienced firefighters would need to build confidence in the activities that can be executed safely in this clothing.
DA - 2019/6//
PY - 2019/6//
DO - 10.1249/01.mss.0000562771.32308.7d
VL - 51
IS - 6
SP - 762-762
SN - 1530-0315
ER -
TY - JOUR
TI - Synthetic molecular recognition nanosensor paint for microalbuminuria
AU - Budhathoki-Uprety, Januka
AU - Shah, Janki
AU - Korsen, Joshua A.
AU - Wayne, Alysandria E.
AU - Galassi, Thomas V
AU - Cohen, Joseph R.
AU - Harvey, Jackson D.
AU - Jena, Prakrit V
AU - Ramanathan, Lakshmi V
AU - Jaimes, Edgar A.
AU - Heller, Daniel A.
T2 - NATURE COMMUNICATIONS
AB - Abstract Microalbuminuria is an important clinical marker of several cardiovascular, metabolic, and other diseases such as diabetes, hypertension, atherosclerosis, and cancer. The accurate detection of microalbuminuria relies on albumin quantification in the urine, usually via an immunoturbidity assay; however, like many antibody-based assessments, this method may not be robust enough to function in global health applications, point-of-care assays, or wearable devices. Here, we develop an antibody-free approach using synthetic molecular recognition by constructing a polymer to mimic fatty acid binding to the albumin, informed by the albumin crystal structure. A single-walled carbon nanotube, encapsulated by the polymer, as the transduction element produces a hypsochromic (blue) shift in photoluminescence upon the binding of albumin in clinical urine samples. This complex, incorporated into an acrylic material, results in a nanosensor paint that enables the detection of microalbuminuria in patient samples and comprises a rapid point-of-care sensor robust enough to be deployed in resource-limited settings.
DA - 2019/8/9/
PY - 2019/8/9/
DO - 10.1038/s41467-019-11583-1
VL - 10
SP -
SN - 2041-1723
UR - http://dx.doi.org/10.1038/s41467-019-11583-1
ER -
TY - JOUR
TI - A critical review of female firefighter protective clothing and equipment workplace challenges
AU - McQuerry, Meredith
AU - Kwon, Cassandra
AU - Johnson, Heather
T2 - RESEARCH JOURNAL OF TEXTILE AND APPAREL
AB - Purpose The purpose of this paper is to identify the challenging barriers faced by female firefighters, which limit workplace entrance and performance. Design/methodology/approach Occupational barriers from both psychological and physiological viewpoints were explored based on previous literature and the reported experiences of female firefighters. Findings A comprehensive review of literature synthesizes previous studies pertaining to gender anthropometric differences, female firefighters’ experiences in the work environment and protective clothing issues. The physical capabilities of men and women in specific relation to performing firefighting activities are also examined. Issues of greatest concern are identified for personal protective clothing (PPC) and equipment, which have traditionally been designed for the male human form. This leads to a lack of protection, an increased risk of onsite injury, reduction in mobility and poorer comfort for female firefighters. Originality/value This review provides an original overview of the critical workplace challenges faced by female firefighters. The need for female-specific PPC and equipment is specifically addressed to retain the growing number of women entering the male-dominated firefighting profession.
DA - 2019/6/3/
PY - 2019/6/3/
DO - 10.1108/RJTA-01-2019-0002
VL - 23
IS - 2
SP - 94-110
SN - 1560-6074
KW - Firefighter
KW - Female
KW - Anthropometrics
KW - Protective clothing
KW - Protective equipment
KW - Sizing
KW - Fit
KW - Functional clothing
ER -
TY - JOUR
TI - Enhanced Photocatalytic and Antibacterial Performance of ZnO Nanoparticles Prepared by an Efficient Thermolysis Method
AU - Abu Hanif, Md
AU - Lee, Insup
AU - Akter, Jeasmin
AU - Islam, Md Akherul
AU - Zahid, Ali A. S. M.
AU - Sapkota, Kamal Prasad
AU - Hahn, Jae Ryang
T2 - CATALYSTS
AB - ZnO nanoparticles (ZnO-NPs) were synthesized by a straightforward modified thermal method using only one chemical: zinc acetate dihydrate. The process is environmentally safer than other methods because it does not involve other chemicals or a catalyst, acid, or base source. X-ray diffraction analysis indicated that the ZnO-NPs crystallize in the hexagonal wurtzite structure. The UV–vis absorption spectra revealed a marked redshift, which is critical for enhanced photocatalytic activity. We used methylene blue for photocatalytic activity tests and found an excellent degradation percentage (99.7%) within a short time (80 min). The antibacterial activity of the synthesized ZnO-NPs was tested against Escherichia coli at different concentrations of ZnO-NPs. The analysis revealed that the minimum inhibitory concentration (MIC) of the ZnO-NPs against E. coli was 30–50 μg/mL. Our ZnO-NPs were found to be more effective than previously reported ZnO-NPs synthesized via other methods.
DA - 2019/7//
PY - 2019/7//
DO - 10.3390/catal9070608
VL - 9
IS - 7
SP -
SN - 2073-4344
KW - ZnO nanoparticles
KW - thermal method
KW - photocatalytic activity
KW - antibacterial activity
ER -
TY - JOUR
TI - Variation in hydrophobic chain length of co-adsorbents to improve dye-sensitized solar cell performance
AU - Silva, Luciano
AU - Freeman, Harold
T2 - PHYSICAL CHEMISTRY CHEMICAL PHYSICS
AB - Improving the performance of dye-sensitized solar cells with the right choice of the molecular structure of the co-adsorbents.
DA - 2019/8/14/
PY - 2019/8/14/
DO - 10.1039/c9cp02439e
VL - 21
IS - 30
SP - 16771-16778
SN - 1463-9084
ER -
TY - JOUR
TI - Multifunctional High-Performance Electrocatalytic Properties of Nb2O5 Incorporated Carbon Nanofibers as Pt Support Catalyst
AU - Shanmugapriya, Sathyanarayanan
AU - Zhu, Pei
AU - Yan, Chaoyi
AU - Asiri, Abdullah M.
AU - Zhang, Xiangwu
AU - Selvan, Ramakrishnan Kalai
T2 - ADVANCED MATERIALS INTERFACES
AB - Abstract Designing an electrocatalyst by integrating multiple classes of materials is an effective strategy for reinforcing the electrode properties. This study demonstrates a facile electrospinning technique for functionalizing the carbon nanofibers (CNFs) with Nb 2 O 5 co‐catalyst as the support material for platinum nanoparticles. The resultant Nb CNF‐Pt electrode has a sensible Pt loading of 30 µg cm −2 and manifests high catalytic activity towards the oxygen reduction reaction (ORR), methanol oxidation reaction (MOR), hydrogen evolution reaction (HER), and oxygen evolution reaction (OER). The Nb CNF‐Pt outperforms the commercial 20 wt% Pt loaded carbon with high positive onset potential (0.99 V vs reversible hydrogen electrode (RHE)) and half‐wave potential (0.87 V vs RHE) during ORR. It also provides large electrochemical active surface area (94.19 m 2 g −1 ) and mass activity (783.34 mA mg −1 ) during MOR. Furthermore, the Nb CNF‐Pt electrode demands an extremely minimal overpotential of 37 and 325 mV and a Tafel slope of 38 and 81 mV dec −1 for HER and OER, respectively. The enhanced electrocatalytic activity of Nb CNF‐Pt is attributed to the strong metal–support interaction between Nb 2 O 5 and Pt, resulting in a uniform loading of Pt NPs with reduced particle size and agglomeration‐free distribution.
DA - 2019/9/6/
PY - 2019/9/6/
DO - 10.1002/admi.201900565
VL - 6
IS - 17
SP -
SN - 2196-7350
UR - https://publons.com/publon/22082964/
KW - carbon nanofibers
KW - co-catalysts
KW - niobium oxide
KW - Pt catalyst supports
ER -
TY - JOUR
TI - Utilising demand response for distribution service restoration to achieve grid resiliency against natural disasters
AU - Hafiz, Faeza
AU - Chen, Bo
AU - Chen, Chen
AU - Queiroz, Anderson Rodrigo
AU - Husain, Iqbal
T2 - IET GENERATION TRANSMISSION & DISTRIBUTION
AB - The increased frequency of power outages due to natural disasters in recent years has highlighted the urgency of enhancing distribution grid resilience. The effective distribution service restoration (DSR) is an important measure for a resilient distribution grid. In this work, the authors demonstrate that DSR can be significantly improved by leveraging the flexibility provided by the inclusion of demand response (DR). The authors propose a framework for this by considering integrated control of household-level flexible appliances to vary the load demand at the distribution-grid level to improve DSR. The overall framework of the proposed system is modelled as a three-step method considering three optimization problems to (i) calculate feasible controllable aggregated load range for each bus, (ii) determine candidate buses to perform DR and their target load demand, and (iii) maintain the load level in each house through home energy management during the DSR, considering uncertainties in load and solar generation sequentially. The optimization problems are formulated as linear programming, mixed-integer linear programming, and multistage stochastic programming (solved using the stochastic dual dynamic programming) models. Case studies performed in the IEEE 123-node test feeder show improvements in resilience in terms of energy restored compared to the restoration process without DR.
DA - 2019/7/23/
PY - 2019/7/23/
DO - 10.1049/iet-gtd.2018.6866
VL - 13
IS - 14
SP - 2942-2950
SN - 1751-8695
KW - optimisation
KW - power grids
KW - energy management systems
KW - power distribution control
KW - power system restoration
KW - demand side management
KW - domestic appliances
KW - demand response
KW - grid resiliency
KW - power outages
KW - distribution grid resilience
KW - resilient distribution grid
KW - integrated control
KW - household-level flexible appliances
KW - distribution-grid level
KW - optimisation problems
KW - aggregated load
KW - target load demand
KW - mixed-integer linear programming
KW - distribution service restoration
KW - IEEE 123-node test feeder system
KW - stochastic dual dynamic programming
KW - multistage stochastic programming
KW - solar generation
KW - home energy management
ER -
TY - JOUR
TI - Simple diphenylamine based D–π–A type sensitizers/co-sensitizers for DSSCs: a comprehensive study on the impact of anchoring groups
AU - Kesavan, Rajalakshmi
AU - Abdellah, Islam M.
AU - Singh, Surya Prakash
AU - El-Shafei, Ahmed
AU - Adhikari, Airody Vasudeva
T2 - Physical Chemistry Chemical Physics
AB - Three new diphenylamine based metal-free dyes were designed and developed as efficient sensitizers as well as co-sensitizers along with N3 in DSSCs. Their detailed photophysical, electrochemical, theoretical and photovoltaic properties have been explored.
DA - 2019///
PY - 2019///
DO - 10.1039/c9cp01032g
VL - 21
IS - 20
SP - 10603-10613
J2 - Phys. Chem. Chem. Phys.
LA - en
OP -
SN - 1463-9076 1463-9084
UR - http://dx.doi.org/10.1039/C9CP01032G
DB - Crossref
ER -
TY - JOUR
TI - Influence of UV stabilizers on the weathering of PETG and PCTT films
AU - Arangdad, Kiarash
AU - Yildirim, Erol
AU - Detwiler, Andrew
AU - Cleven, Curtis D.
AU - Burk, Christopher
AU - Shamey, Renzo
AU - Pasquinelli, Melissa A.
AU - Freeman, Harold S.
AU - El-Shafei, Ahmed
T2 - JOURNAL OF APPLIED POLYMER SCIENCE
AB - ABSTRACT The influence of two UV photostabilizers on the photostability of Polyethylene‐co‐CHDM‐terephthalate (PETG) and Polycyclohexylenedimethylene‐Co‐TMCD‐terephthalate (PCTT) copolyester films was investigated. Untreated films and films containing stabilizer were irradiated. The resulting films were analyzed by attenuated total reflectance Fourier transform infrared (ATR FTIR) spectroscopy, gel permeation chromatography (GPC), and X‐ray photoelectron spectroscopy (XPS). FTIR spectra of the irradiated films containing Cyasorb 1164 showed less change in intensity of the broad peak corresponding to OH groups, than the films containing Cyasorb 3638, indicating that Cyasorb 1164 is a better photostabilizer for these films. XPS results showed that the decrease in C/O ratio, due to photodegradation, was greater in films containing Cyasorb 3638 compared to those containing Cyasorb 1164. The formation of degradation products was evident from emission spectra arising from extracts of irradiated films based on PCTT +10% Cyasorb 3638, but no degradation products were apparent in extracts from irradiated PCTT +10% Cyasorb 1164. UV‐absorption spectra of Cyasorb 1164 overlap more substantially with the absorption spectra of PETG and PCTT. The results from FTIR, XPS, and GPC analyses of the irradiated PETG and PCTT films demonstrated that Cyasorb 1164 was more effective than Cyasorb 3638 in enhancing resistance to UV‐induced weathering. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48198.
DA - 2019/12/15/
PY - 2019/12/15/
DO - 10.1002/app.48198
VL - 136
IS - 47
SP -
SN - 1097-4628
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85069911866&partnerID=MN8TOARS
KW - cyclic voltammetry
KW - DFT calculation
KW - gel permeation chromatography
KW - Fourier transform infrared spectroscopy
KW - photodegradation
KW - UV stabilizers
KW - X-ray photoelectron spectroscopy
ER -
TY - JOUR
TI - Empirical model to simulate morphology of electrospun polycaprolactone mats
AU - Yousefi, S. H.
AU - Tang, C.
AU - Tafreshi, H. Vahedi
AU - Pourdeyhimi, B.
T2 - Journal of Applied Polymer Science
AB - ABSTRACT This work is the first to report a study aimed at generating 3D virtual geometries that represent the microstructure of an electrospun fibrous mat comprised curly fibers. Polycaprolactone (PCL) mats are considered in our study as an example of such fibrous structures. We started with simulating the formation of PCL filaments and observed good agreement between the predicted and measured fiber diameters. In the absence of quantitative information about the shape of a curly PCL fiber, we treated these fibers as arrays of beads arranged on epitrochoid profiles. We then used the fiber deposition diameter and velocity in a mass‐spring‐damper (MSD) model to generate 3D fibrous geometries comprised hundreds of such curly fibers. The damping and spring constants in the MSD model were obtained through calibration with experimental data reported for single electrospun PCL nanofibers. The size of the epitrochoid‐like fibers was obtained empirically through matching the average thickness of the resulting mats with those measured experimentally. With the calibrated code, we studied the effects of electrospinning conditions on the porosity of PCL nanofiber mats. It was found that increasing the voltage or decreasing the needle‐to‐collector distance results in PCL mats with thicker fibers, and consequently, lower porosities. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48242.
DA - 2019/7/13/
PY - 2019/7/13/
DO - 10.1002/app.48242
VL - 136
IS - 46
SP - 48242
J2 - J Appl Polym Sci
LA - en
OP -
SN - 0021-8995 1097-4628
UR - http://dx.doi.org/10.1002/APP.48242
DB - Crossref
KW - electrospinning
KW - modeling
KW - nanofibers
KW - PCL
ER -
TY - JOUR
TI - Nanoscale Restructuring of Polymer Materials to Produce Single Polymer Composites and Miscible Blends
AU - Tonelli, Alan E.
T2 - BIOMOLECULES
AB - I summarize work conducted in our laboratories over the past 30 years using small host molecules to restructure polymer materials at the nanometer level. Certain small molecules, such as the cyclic starches cyclodextrins (CDs) and urea (U) can form non-covalent crystalline inclusion compounds (ICs) with a range of guest molecules, including many polymers. In polymer-CD- and -U-ICs, guest polymer chains reside in narrow channels created by the host molecule crystals, where they are separated and highly extended. When the host crystalline lattice is carefully removed, the guest polymer chains coalesce into a bulk sample with an organization that is distinct from that normally produced from its melt or from solution. Amorphous regions of such coalesced polymer samples have a greater density, likely with less chain entanglement and more chain alignment. As a consequence, after cooling from their melts, coalesced amorphous polymers show glass-transition temperatures (Tgs) that are elevated above those of samples prepared from their solutions or melts. Upon cooling from their melts, coalesced samples of crystallizable polymers show dramatically-increased abilities to crystallize more rapidly and much closer to their melting temperatures (Tms). These unique behaviors of polymers coalesced from their CD- and U-ICs are unexpectedly resistant to extended annealing above their Tgs and Tms. Taking advantage of this behavior permits us to create polymer materials with unique and improved properties. Among these are amorphous polymers with elevated Tgs and semi-crystalline polymers with finer more uniform morphologies. Improved mechanical properties can be achieved through self-nucleation with small amounts of the same polymer made rapidly crystallizable through coalescence from its CD- or U-IC. This can lead to single polymer composites with as-received polymer matrices and self-nucleated reinforcements. Through simultaneous formation and subsequent coalescence from their common CD-ICs, stable well-mixed blends can be achieved between any two or more polymers, despite their inherent immiscibilities. Such coalesced and well-mixed blends are also resistant to phase segregation when heated for extensive periods well above their Tgs and Tms.
DA - 2019/6//
PY - 2019/6//
DO - 10.3390/biom9060240
VL - 9
IS - 6
SP -
SN - 2218-273X
KW - polymer inclusion compounds
KW - coalesced polymers
KW - self-nucleation
KW - miscible blending
KW - single polymer composites
ER -
TY - JOUR
TI - Analysis of keratin films as screening tools for predicting the efficacy of potential hair dyes
AU - Williams, Tova N.
AU - Freeman, Harold S.
T2 - COLORATION TECHNOLOGY
AB - Abstract The technology for generating high quality keratin films has recently advanced and led to their implementation in a variety of applications. As an initial step toward investigating the films as a screening tool for predicting the efficacy of potential hair dyes, CI Acid Orange 7 was applied to a set of opaque and translucent films. Overlaid time‐of‐flight secondary ion mass spectrometry images arising from protein and dye fragments revealed that dye uniformly penetrated both film types. Results also showed that the relative concentration of dye in each film complemented outcomes from ultraviolet‐visible analysis and revealed that the translucent film contained a higher dye concentration. Scanning electron microscopy analysis of film morphology suggested that the observed difference was due to the higher porosity of the opaque film, which facilitated dye desorption during the rinsing step. Consequently, the translucent film was judged to be a better substrate for screening potential new hair dyes.
DA - 2019/8//
PY - 2019/8//
DO - 10.1111/cote.12408
VL - 135
IS - 4
SP - 253-266
SN - 1478-4408
UR - https://doi.org/10.1111/cote.12408
ER -
TY - JOUR
TI - Corrosion resistant coating based on thiol-ene polymeric system
AU - Rezaei, Farzad
AU - Dickey, Michael D.
AU - Hauser, Peter J.
T2 - PROGRESS IN ORGANIC COATINGS
AB - This study presents a method of preparation of corrosion resistant thin organic coatings. This thin organic coating is designed to protect a stack of several thin inorganic (metallic and oxide) layers that have low infrared emissivity and are sputter deposited on top of a flexible polyethylene terephthalate (PET) substrate. It is argued that, in contact with an acidic environment, the most sensitive material in this stack is indium tin oxide. The proposed protective organic coating consists of a crosslinkable thiol-ene network, a low surface energy fluorinated compound and a silane adhesion promoter cured under exposure to an ultra-violet light source. The results show that such the optimized organic precursor can lead to thin polymeric coating that can successfully protect the sensitive substrate yet does not have a detrimental interference with its low emissivity.
DA - 2019/8//
PY - 2019/8//
DO - 10.1016/j.porgcoat.2019.04.073
VL - 133
SP - 350-356
SN - 0300-9440
KW - Organic coating
KW - Acid corrosion
KW - ITO
KW - Emissivity
KW - XRD
ER -
TY - JOUR
TI - Nature-Inspired Liquid Infused Systems for Superwettable Surface Energies
AU - Ashrafi, Zahra
AU - Lucia, Lucian
AU - Krause, Wendy
T2 - ACS APPLIED MATERIALS & INTERFACES
AB - The development of an innovative interfacial wetting strategy known as liquid infused systems offers great promise for the advanced design of superwetting and superantiwetting substrates to overcome the drawbacks of textured surfaces classified under the heading of Cassie/Wenzel states. The potential value of nature-inspired surfaces has significant potential to address scientific and technological challenges within the field of interfacial chemistry. The objective of the current review is to provide insights into a fruitful and young field of research, highlight its historical developments, examine its nature-inspired design principles, gauge recent progress in emerging applications, and offer a fresh perspective for future research.
DA - 2019/6/19/
PY - 2019/6/19/
DO - 10.1021/acsami.9b00930
VL - 11
IS - 24
SP - 21275-21293
SN - 1944-8252
KW - liquid infused systems
KW - slippery surfaces
KW - superwetting
KW - superantiwetting
KW - repellency
ER -
TY - JOUR
TI - Quantification on Growing Mass of Solid Electrolyte Interphase and Deposited Mn(II) on the Silicon Anode of LiMn2O4 Full Lithium-Ion Cells
AU - Chen, Haihui
AU - Xu, Hanying
AU - Zeng, Yingying
AU - Ma, Tianyi
AU - Wang, Wei
AU - Liu, Limin
AU - Wang, Fang
AU - Zhang, Xiangwu
AU - Qiu, Xinping
T2 - ACS Applied Materials & Interfaces
AB - Silicon is considered to be one of the most important high-energy density anode materials for next-generation lithium-ion batteries. A large number of experimental studies on silicon anode have achieved better results, and greatly promoted its practical application potentiality, but almost of them are only tested in metal lithium half batteries. There is still an unavoidable question for commercial applications: what is the performance of the full cell composed of a silicon anode and a manganese-based material cathode? In this paper, the growing solid electrolyte interphase (SEI) and deposited manganese ions of the silicon anode's surface of the spinel lithium manganese oxide LiMn2O4/silicon full cells are quantitatively studied during electrochemical cycling, and the SEI performances are tested by differential scanning calorimetry to find out the reason for the rapid decline of reversible capacity in the LiMn2O4/silicon system. The experimental results show that manganese ions can make SEI films rapidly grow on the silicon anode and make SEI films more brittle, which results in lower Coulombic efficiency and rapid decline in capacity of the silicon anode.
DA - 2019/8/7/
PY - 2019/8/7/
DO - 10.1021/acsami.9b07400
VL - 11
IS - 31
SP - 27839-27845
UR - https://doi.org/10.1021/acsami.9b07400
KW - solid electrolyte interphase
KW - quantification
KW - Coulombic efficiency
KW - lithium ion battery
KW - full cell
ER -
TY - JOUR
TI - Electronic Metal-Support Interaction To Modulate MoS2-Supported Pd Nanoparticles for the Degradation of Organic Dyes
AU - Shi, Yi
AU - Huang, Xiao-Kun
AU - Wang, Yang
AU - Zhou, Yue
AU - Yang, Dong-Rui
AU - Wang, Feng-Bin
AU - Gao, Wei
AU - Xia, Xing-Hua
T2 - ACS APPLIED NANO MATERIALS
AB - Electronic modulation of heterogeneous metal catalysts has been considered as an effective means to optimize their catalytic performance. Two-dimensional nanomaterials, typically used as the supporting substrates for anchoring the active metal nanoparticles, are well-known to profoundly influence the electronic structure of metals through interfacial electronic metal–support interaction (EMSI). However, the detailed investigation of EMSI for catalytic enhancement still remains obscure at the microscopic level. Herein, we propose to utilize MoS2 nanosheets to modulate the electronic structure of Pd through EMSI and investigate the influence of “support effect” of MoS2 on the catalytic activity of Pd utilizing degradation of methylene blue (MB) with the electron donor NaBH4 as a simple model reaction. Mechanistic investigations reveal that the electron transfer from Pd to MoS2 makes a highly electron-deficient Pd surface. During the target catalysis, this interfacial electronic structure makes the surface of Pd favor the adsorption of electron-rich reactants (for example, NaBH4), accelerating the electron transfer from NaBH4 to MB. Our finding promises an effective and facile strategy for catalyst design and sheds more insights into the structure–activity relationship of supported metal catalysts in general.
DA - 2019/6//
PY - 2019/6//
DO - 10.1021/acsanm.9b00297
VL - 2
IS - 6
SP - 3385-3393
SN - 2574-0970
KW - palladium nanoparticles
KW - chemically exfoliated MoS2
KW - support effect
KW - electronic metal-support interaction
KW - catalytic reaction
ER -
TY - JOUR
TI - Bi-component Carbohydrate and Lignin Nanoparticle Production from Bio-refinery Lignin: A Rapid and Green Method
AU - Sadeghifar, Hasan
AU - Venditti, Richard A.
AU - Pawlak, Joel J.
AU - Jur, Jesse
T2 - BIORESOURCES
AB - A rapid and green preparation of lignin nanoparticles was demonstrated starting from bio-refinery lignin containing grafted carbohydrates. The particles were prepared by recovering a fraction of the lignin, which contained 24% carbohydrate (by weight) as the insoluble fraction in 0.5 M NaOH. The carbohydrate content of this fraction was verified with a wet chemistry analytical technique, nuclear magnetic resonance, and X-ray diffraction. This fraction was then dissolved in a NaOH/urea/water system and added dropwise to water under a high shear, which rapidly formed precipitated particles in a size range of approximately 100 nm. This carbohydrate-containing fraction of the lignin was soluble in a green solvent system that was not suited for lignin alone. The generated particles were stable in different organic solvents and water. Overall, the dissolution of the bio-refinery lignin in the NaOH/urea/water system, followed by precipitation in water can be regarded as a green and rapid method to produce stable nanoparticles. The generated nanoparticles, containing both carbohydrates and lignin, are expected to have unique applications because of their bi-component nature. Furthermore, this is the first publication to show how materials with high levels of lignin can be solubilized in solvents that are conventionally used for cellulose.
DA - 2019/8//
PY - 2019/8//
DO - 10.15376/biores.14.3.6179-6185
VL - 14
IS - 3
SP - 6179-6185
SN - 1930-2126
KW - Carbohydrate-lignin
KW - Lignin nanoparticle
KW - Bio-refinery lignin
KW - Green processing
KW - Sodium hydroxide
KW - Urea
KW - Bi-component
ER -
TY - JOUR
TI - Electrically Conductive Coatings for Fiber-Based E-Textiles
AU - Chatterjee, Kony
AU - Tabor, Jordan
AU - Ghosh, Tushar K.
T2 - FIBERS
AB - With the advent of wearable electronic devices in our daily lives, there is a need for soft, flexible, and conformable devices that can provide electronic capabilities without sacrificing comfort. Electronic textiles (e-textiles) combine electronic capabilities of devices such as sensors, actuators, energy harvesting and storage devices, and communication devices with the comfort and conformability of conventional textiles. An important method to fabricate such devices is by coating conventionally used fibers and yarns with electrically conductive materials to create flexible capacitors, resistors, transistors, batteries, and circuits. Textiles constitute an obvious choice for deployment of such flexible electronic components due to their inherent conformability, strength, and stability. Coating a layer of electrically conducting material onto the textile can impart electronic capabilities to the base material in a facile manner. Such a coating can be done at any of the hierarchical levels of the textile structure, i.e., at the fiber, yarn, or fabric level. This review focuses on various electrically conducting materials and methods used for coating e-textile devices, as well as the different configurations that can be obtained from such coatings, creating a smart textile-based system.
DA - 2019/6//
PY - 2019/6//
DO - 10.3390/fib7060051
VL - 7
IS - 6
SP -
SN - 2079-6439
UR - https://doi.org/10.3390/fib7060051
KW - flexible electronics
KW - smart textiles
KW - conductive coatings
KW - e-textiles
ER -
TY - JOUR
TI - Near room temperature dyeing of m-aramid fabrics
AU - Vu, Nguyen
AU - Michielsen, Stephen
T2 - JOURNAL OF APPLIED POLYMER SCIENCE
AB - ABSTRACT Due to their high crystallinity and inertness, the coloration of meta‐aramid fiber has been widely confirmed to be difficult. Though substantial improvements have been achieved, the dyeing of this fiber still requires high temperature and long duration for good color strength and shade. In this article, grafting poly(acrylic acid), a polyelectrolyte, onto meta‐aramind fibers followed by dyeing via conventional pad‐dry‐cure technique resulted in good dyeing and a decrease the dyeing time and temperature. Dyed samples that possess industrially acceptable K/S values were produced in 15 minutes at room temperature (25–27 °C) under neutral pH. Dyed samples had good dry and wet crockfastness. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 48190.
DA - 2019/12/5/
PY - 2019/12/5/
DO - 10.1002/app.48190
VL - 136
IS - 45
SP -
SN - 1097-4628
UR - https://doi.org/10.1002/app.48190
KW - cationic dyes
KW - dyeability
KW - meta-aramid
KW - pad-dry-cure
KW - poly(acrylic acid)
KW - surface grafting
ER -
TY - JOUR
TI - CENTRIFUGAL SPINNING-HIGH RATE PRODUCTION OF NANOFIBERS
AU - Chen, Chen
AU - Dirican, Mahmut
AU - Zhang, Xiangwu
T2 - ELECTROSPINNING: NANOFABRICATION AND APPLICATIONS
AB - Nanofibers have attracted tremendous attention due to their flexibility, large surface area, and ease of modification, and they have been widely utilized in different applications such as filtration, tissue engineering, drug delivery, protective clothing, energy storage, etc. At this writing, the most commonly used method to produce nanofibers is electrospinning. However, the utilization of a high-voltage setup and the low production rate have become barriers to its use in large scale. Centrifugal spinning is an efficient approach to producing nanofibers from various materials. During centrifugal spinning, the polymer solution or polymer melt is ejected out of the rotating spinning head, and when the centrifugal force overcomes the surface tension of the polymer liquid material, the polymer jet undergoes a stretching process and is eventually deposited on the collector, forming solidified nanofibers. This chapter gives an overview of the history, working mechanism, influential parameters, and various applications of the centrifugal spinning method.
DA - 2019///
PY - 2019///
DO - 10.1016/B978-0-323-51270-1.00010-8
SP - 321-338
UR - https://publons.com/publon/26924630/
ER -
TY - JOUR
TI - Influence of sea polymer removal on sound absorption behavior of islands-in-the-sea spunbonded nonwovens
AU - Suvari, Fatih
AU - Ulcay, Yusuf
AU - Pourdeyhimi, Behnam
T2 - TEXTILE RESEARCH JOURNAL
AB - This work presents the results of efforts focused on the development of relatively lightweight and fibrous acoustic webs. For this objective, nonwoven webs that contain bicomponent filaments with islands-in-the-sea cross sections were produced by spunbonding, which involves the extrusion of sea and island polymer melts through dies, cooling and attenuating the bicomponent filaments by high-velocity air streams. Nylon 6 and polyethylene were used as the island and sea polymers, respectively. Webs were hydroentangled with high-pressure water jets prior to the dissolving process to obtain fiber entanglement. Sea polymer was removed from the spunbonded nonwovens by using a reflux dissolution setup. Weight, thickness, air permeability, pore size and sound absorption coefficients of the nonwoven samples were measured before and after the sea polymer removal. Results demonstrated that sea polymer removal led to further bicomponent filament fibrillation, which affected sound absorption positively. The structure with the higher number of island fibers had better acoustical properties. Lightweight and fibrous acoustic nonwovens can be obtained with the method given in this study.
DA - 2019/6//
PY - 2019/6//
DO - 10.1177/0040517518797332
VL - 89
IS - 12
SP - 2444-2455
SN - 1746-7748
KW - nonwoven
KW - spunbond
KW - sound absorption
KW - acoustic
KW - islands-in-the-sea
ER -
TY - JOUR
TI - In situ 3D bacterial cellulose/nitrogen-doped graphene oxide quantum dot-based membrane fluorescent probes for aggregation-induced detection of iron ions
AU - Lv, Pengfei
AU - Zhou, Huimin
AU - Mensah, Alfred
AU - Feng, Quan
AU - Lu, Keyu
AU - Huang, Jieyu
AU - Li, Dawei
AU - Cai, Yibing
AU - Lucia, Lucian
AU - Wei, Qufu
T2 - CELLULOSE
DA - 2019/7//
PY - 2019/7//
DO - 10.1007/s10570-019-02476-z
VL - 26
IS - 10
SP - 6073-6086
SN - 1572-882X
KW - Bacterial cellulose
KW - Graphene oxide quantum dots
KW - Fluorescence
KW - Sensitivity
KW - Probe
ER -
TY - JOUR
TI - Effects of drawing process on crimp formation-ability of side-by-side bicomponent filament yarns produced from recycled, fiber-grade and bottle-grade PET
AU - Abbasi, Marjan
AU - Kotek, Richard
T2 - JOURNAL OF THE TEXTILE INSTITUTE
AB - In this study, side-by-side bicomponent filaments from recycled poly(ethylene) terephthalate (R-PET) from post-consumer bottles, fiber-grade PET (FG-PET) and bottle-grade PET (BG-PET) successfully were extruded. The bicomponent fibers in the forms of FG/R, BG/R and FG/BG were produced in a spinning machine and drawn by a thermal drawing process to improve their mechanical properties using draw ratios between ‘2.5 and 2.8’. The effects of conditions on the fiber structure, physical properties and crimp formation of resultant fibers were evaluated. The birefringence, shrinkage and mechanical properties, such as tensile strength and tensile modulus, increased and elongation at break decreased for the drawn fibers, and this was attributed to the fiber orientation. Distinct crimp formation was observed from drawn bicomponent fibers after thermal treatment. There were significant birefringence and shrinkage difference between two components in drawn bicomponent fibers caused to severe crimp formation.
DA - 2019/10/3/
PY - 2019/10/3/
DO - 10.1080/00405000.2019.1611523
VL - 110
IS - 10
SP - 1439-1444
SN - 1754-2340
KW - Bicomponent
KW - PET
KW - recycling
KW - filament
KW - draw ratio
KW - side-by-side
KW - crimp formation
ER -
TY - JOUR
TI - Effect of dynamic and static loading during in vitro degradation of a braided composite bioresorbable cardiovascular stent
AU - Zhao, Fan
AU - Wang, Fujun
AU - King, Martin W.
AU - Wang, Lu
T2 - MATERIALS LETTERS
AB - Bioresorbable cardiovascular stents are usually subjected to dynamic mechanical loads in vivo, which results in a different degradation profile compared to that measured under a static in vitro immersion test. In this study, a dynamic test platform was used to mimic cyclic pulsatile pressure and compared the changes in polymer properties of poly(p-dioxaone)/polycaprolane (PPDO/PCL) braided composite bioresorbable stents (BCBRSs) with static loading and non-loaded environments. The results showed static compressive load accelerated the changes in the hydrolysis process and crystallinity for polymers while the pulsatile pressure increased surface corrosion of the stent struts. Moreover, the degradation rate under dynamic loading was attenuated due to the mitigation of viscous flow of molecule chains and autocatalysis process, compared with that under static loading and non-loaded conditions.
DA - 2019/9/1/
PY - 2019/9/1/
DO - 10.1016/j.matlet.2019.04.097
VL - 250
SP - 12-15
SN - 1873-4979
KW - Biomimetic
KW - Fibre technology
KW - Polymeric composites
ER -
TY - JOUR
TI - Unique hue stimulus selection using Munsell color chips under different chroma levels and illumination conditions
AU - Shamey, Renzo
AU - Zubair, Muhammad
AU - Cheema, Hammad
T2 - JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
AB - To determine the role of chroma and illumination conditions on assessments of unique hue stimuli (UHs: Y, B, R, and G) 25 color normal observers selected Munsell color chips under controlled but different light sources that included simulated D65 daylight, incandescent (A), CWF and TL84, from two rotatable trays—one containing low and the other high chroma samples. Three independent evaluations were obtained from each observer with a gap of at least 24 h between assessments. A total of 2400 UH assessments were thus obtained. The mean, as well as the range and variability, in UH selections was calculated according to gender, illumination condition, and chroma. Results show statistically significant differences for uB and uR stimuli selections from the low to the high chroma sets under all lighting conditions, and for uY under light source A and CWF while differences in uG selections in different lighting conditions were statistically insignificant. No significant difference was found between male and female UH selections. Hue shift predictions based on CAT02 transform were found to agree well with observer responses under different illumination conditions. It was also found that observers’ UH choices varied more for low chroma samples under different lighting conditions compared to high chroma samples. The highest variability was obtained under light source CWF, while the simulated D65 source resulted in the lowest variability in selections.
DA - 2019/6/1/
PY - 2019/6/1/
DO - 10.1364/JOSAA.36.000983
VL - 36
IS - 6
SP - 983-993
SN - 1520-8532
UR - https://doi.org/10.1364/JOSAA.36.000983
ER -
TY - JOUR
TI - Engineering small-caliber vascular grafts from collagen filaments and nanofibers with comparable mechanical properties to native vessels
AU - Zhang, Fan
AU - Xie, Yu
AU - Celik, Hakan
AU - Akkus, Ozan
AU - Bernacki, Susan H.
AU - King, Martin W.
T2 - BIOFABRICATION
AB - At the present time, there is no successful synthetic, off-the-shelf small-caliber vascular graft (<6 mm) for the repair or bypass of the coronary or carotid arteries. This stimulates on-going investigations to fabricate an artificial vascular graft that has both sufficient mechanical properties as well as superior biological performance. Collagen has long been considered as a viable material to encourage cell recruitment, tissue regeneration, and revascularization, but its use has been limited by its inferior mechanical properties. In this study, novel electrochemically aligned collagen filaments were used to engineer a bilayer small-caliber vascular graft, by circular knitting the collagen filaments and electrospinning collagen nanofibers. The collagen prototype grafts showed significantly greater bursting strength under dry and hydrated conditions to that of autografts such as the human internal mammary artery and the saphenous vein (SV). The suture retention strength was sufficient under dry condition, but that under hydrated condition needs to be further improved. The radial dynamic compliance of the collagen grafts was similar to that of the human SV. During in vitro cell culture assays with human umbilical vein endothelial cells, the prototype collagen grafts also encouraged cell adhesion and promoted cell proliferation compared to the synthetic poly(lactic acid) grafts. In conclusion, this study demonstrated the feasibility of the use of novel collagen filaments for fabricating small caliber tissue-engineered vascular grafts that provide both sufficient mechanical properties and superior biological performance.
DA - 2019/7//
PY - 2019/7//
DO - 10.1088/1758-5090/ab15ce
VL - 11
IS - 3
SP -
SN - 1758-5090
KW - small caliber vascular graft
KW - endothelialization
KW - knitting
KW - electrospinning
KW - electrochemically aligned collagen (ELAC) filament
KW - collagen nanofibers
KW - mechanical properties
ER -
TY - JOUR
TI - Screen Printing of Graphene Oxide Patterns onto Viscose Nonwovens with Tunable Penetration Depth and Electrical Conductivity
AU - Qu, Jiangang
AU - He, Nanfei
AU - Patil, Shradha V.
AU - Wang, Yanan
AU - Banerjee, Debjyoti
AU - Gao, Wei
T2 - ACS APPLIED MATERIALS & INTERFACES
AB - Graphene-based e-textiles have attracted great interest because of their promising applications in sensing, protection, and wearable electronics. Here, we report a scalable screen-printing process along with continuous pad-dry-cure treatment for the creation of durable graphene oxide (GO) patterns onto viscose nonwoven fabrics at controllable penetration depth. All the printed nonwovens show lower sheet resistances (1.2–6.8 kΩ/sq) at a comparable loading, as those reported in the literature, and good washfastness, which is attributed to the chemical cross-linking applied between reduced GO (rGO) flakes and viscose fibers. This is the first demonstration of tunable penetration depth of GO in textile matrices, wherein GO is also simultaneously converted to rGO and cross-linked with viscose fibers in our processes. We have further demonstrated the potential applications of these nonwoven fabrics as physical sensors for compression and bending.
DA - 2019/4/24/
PY - 2019/4/24/
DO - 10.1021/acsami.9b00715
VL - 11
IS - 16
SP - 14944-14951
SN - 1944-8252
UR - http://dx.doi.org/10.1021/acsami.9b00715
KW - graphene oxide
KW - screen printing
KW - cross-linking
KW - e-textile
KW - textile sensors
ER -
TY - JOUR
TI - Equilibrium clamshell drops on conical surfaces: effect of curvature and gravity
AU - Sun, Xiaohang
AU - Zhang, Wenwen
AU - Lee, Hoon Joo
AU - Michielsen, Stephen
T2 - COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
AB - Although extensive research has been performed on barrel shaped drops on fibers and cones, little research has been reported for clamshell shaped drops on curved surfaces with a gradient in the curvature. In this article, equilibrium clamshell shaped drops have been simulated on conical fiber sections via finite-element simulation. The equilibrium drop shape, Gibbs free energy, and curvature-induced force along the cone of the equilibrium clamshell drops were obtained using a series of Surface Evolver (SE) simulations including the unique wetting behavior caused by the significant circumferential spreading near the apex of the cone. This series also incorporated the effect of drop volume, cone half-angle and contact angle. Furthermore, the effect of gravity was simulated based on the difference between sessile and pendant drops on the conical surface.
DA - 2019/7/5/
PY - 2019/7/5/
DO - 10.1016/j.colsurfa.2019.03.074
VL - 572
SP - 203-210
SN - 1873-4359
UR - http://dx.doi.org/10.1016/j.colsurfa.2019.03.074
KW - Clamshell droplet
KW - Conical surfaces
KW - Surface Evolver
KW - Gravitational effect
KW - Young-Laplace equation
ER -
TY - JOUR
TI - Impact Spatter Bloodstain Patterns on Textiles
AU - Wu, Jiaying
AU - Michielsen, Stephen
AU - Baby, Ruksana
T2 - JOURNAL OF FORENSIC SCIENCES
AB - Abstract There are few reports of studies of impact spatter on textiles even though bloodstained textiles are found at many violent scenes. Impact spatter was deposited at 90° impact angle onto three knit fabrics of different yarn sizes and on paper. The resulting stain areas and number of stains were measured using ImageJ and compared with stains on paper using one‐factor ANOVA . The number of stains observed and their areas on the knit fabrics decreased as the yarn size increased. It was also found that blood that deposited on the fabric wicked only in the direction of the fibers at that location within the fabric which led to distorted stain shapes. Fewer observed impact spatter stains were found on cotton jersey knits for fabrics made with larger yarns than on paper. As the yarn size became smaller, the number of stains became the same as on paper.
DA - 2019/5//
PY - 2019/5//
DO - 10.1111/1556-4029.13951
VL - 64
IS - 3
SP - 702-710
SN - 1556-4029
UR - https://doi.org/10.1111/1556-4029.13951
KW - forensic science
KW - impact spatter
KW - bloodstain pattern analysis
KW - textiles
KW - rattrap
KW - porcine blood
ER -
TY - JOUR
TI - An introduction to a new direct testing method for characterizing pressure in compression fabrics
AU - Kwon, Cassandra
AU - Hegarty, Meghan
AU - Oxenham, William
AU - Thoney-Barletta, Kristin
AU - Grant, Edward
AU - Reid, Lawrence
T2 - JOURNAL OF THE TEXTILE INSTITUTE
AB - A newly developed direct pressure measuring system known as the CRIM Pressure System was compared with a traditional direct measuring device, the PicoPress Compression System, for compression bandage and hosiery samples. PicoPress measurements were taken both on the CRIM system and on research participants. Initial results indicated a good correlation between CRIM Pressure System and PicoPress participants’ measurements.
DA - 2019/6/3/
PY - 2019/6/3/
DO - 10.1080/00405000.2018.1527966
VL - 110
IS - 6
SP - 822-831
SN - 1754-2340
KW - Compression medical textiles
KW - compression garments
KW - interface pressure
KW - body measurement
KW - sensor measuring
ER -
TY - JOUR
TI - Fabric infused with a botanical repellent for protection against mosquitoes
AU - Halbkat, Lilah
AU - Luan, Kun
AU - Cave, Grayson
AU - McCord, Marian
AU - Roe, Michael
AU - DenHartog, Emiel
AU - Travanty, Nicholas J.
AU - Apperson, Charles S.
AU - West, Andre J.
T2 - The Journal of The Textile Institute
AB - Mosquito resistant apparel has become increasingly sought-after due to the rise in vector-borne illnesses such as the Zika Virus, Malaria, and Dengue Fever. Botanical insect repellents have been introduced to the market for consumers that desire a natural solution involving no pesticides or added chemicals. Fabric swatches consisting of 80% nylon and 20% elastane were separately treated with an organic repellent using a patented nonwoven vessel. The fabrics were then tested for effectiveness in repelling the mosquito Aedes aegypti using an arm-in-cage assay, the most commonly used method for mosquito repellents. The repellents were also evaluated and rated by study participants according to their preference for the appeal of the scent. The treatment method is user-friendly, enabling consumers to treat their clothing with an organic insect repellent as opposed to applying a synthetic chemical to their clothing and skin. The infused fabrics showed to be effective at repelling mosquitoes for up to 8 h after repellent infusion.
DA - 2019/4/14/
PY - 2019/4/14/
DO - 10.1080/00405000.2019.1603576
VL - 110
IS - 10
SP - 1468-1474
J2 - The Journal of The Textile Institute
LA - en
OP -
SN - 0040-5000 1754-2340
UR - http://dx.doi.org/10.1080/00405000.2019.1603576
DB - Crossref
KW - Infused
KW - repellent
KW - fabric
KW - protective
KW - garment
KW - insect
ER -
TY - JOUR
TI - Role of Local Polymer Conformations on the Diverging Glass Transition Temperatures and Dynamic Fragilities of Isotactic-, Syndiotactic-, and Atactic-Poly(methyl methacrylate)s
AU - Shen, Jialong
AU - Yildirim, Erol
AU - Li, Shanshan
AU - Caydamli, Yavuz
AU - Pasquinelli, Melissa A.
AU - Tonelli, Alan E.
T2 - Macromolecules
AB - The profound stereosequence dependence of the glass transition temperature (Tg) of poly(methyl methacrylate)s (PMMAs) offers the possibility to evaluate any conformational contributions to their glass formation processes. Close to Tg for a given polymer liquid, the viscosity and relaxation time increase dramatically, leading to the temperature dependence of its dynamics to deviate from Arrhenius behavior. The degree of that deviation is called dynamic fragility (m). The broad reported variations for Tg of over 70 K and for m of 90 necessitated new measurements for each sample using the same protocols to keep comparisons reliable. The limiting values of fictive temperature as a function of cooling rates were measured using differential scanning calorimetry (DSC) and were used to calculate m values of two stereoregular PMMAs, isotactic (i) and syndiotactic (s), as well as three atactic (a) PMMAs with different molecular weights. For a-PMMAs, m exhibited a positive dependence on molecular weight, and the m values for s- and i-PMMAs were consistent with the previous studies to be high and low, respectively. Heat capacity changes at Tg correlate negatively with m, probably due to the breakdown of their thermorheological simplicity. Conformational analyses were conducted at the dimer level to elucidate the potential role of local polymer conformations. Rotational isomeric state Monte Carlo simulations and conformational analyses provide insights into the molecular origin of the Tg and m differences of i-PMMA and s-PMMA. On the other hand, we demonstrated that the characteristic ratio is not a suitable parameter for characterizing PMMA flexibility and is irrelevant to m. A future focus on the local conformational geometry of glass-forming polymers is proposed.
DA - 2019/5/28/
PY - 2019/5/28/
DO - 10.1021/acs.macromol.9b00434
VL - 52
IS - 10
SP - 3897-3908
UR - https://doi.org/10.1021/acs.macromol.9b00434
ER -
TY - JOUR
TI - Quantitative evaluation of mattresses using a thermal seat tester
AU - Cannon, Forrest R.
AU - DenHartog, Emiel A.
T2 - The Journal of The Textile Institute
AB - Mattresses have the ability to deliver different degrees of thermal comfort to users. However, there is no current standardized test method for assessing the thermal comfort of mattresses. In efforts to create such a test method, the following research utilized an inverted thermal hotplate heated to 35 °C that was placed on three different mattresses at three testing temperatures. The three types of mattresses tested were innerspring, foam, and foam with phase change materials (PCMs). By analyzing surface temperature, heat flux generated, thermal resistance, and the time required to reach steady state thermal resistance, differences in the thermal properties of the mattresses were found in the short term (initial 30 min) and in the long term. The data showed very good repeatability and significant differences between the very different mattresses. The inverted hot plate served as a reliable tool to assess thermal differences between mattresses in the dry state.
DA - 2019/4/19/
PY - 2019/4/19/
DO - 10.1080/00405000.2019.1598315
VL - 110
IS - 9
SP - 1352-1358
J2 - The Journal of The Textile Institute
LA - en
OP -
SN - 0040-5000 1754-2340
UR - http://dx.doi.org/10.1080/00405000.2019.1598315
DB - Crossref
ER -
TY - JOUR
TI - A generalized variational approach for predicting contact angles of sessile nano-droplets on both flat and curved surfaces
AU - Jasper, Warren J.
AU - Anand, Nadish
T2 - JOURNAL OF MOLECULAR LIQUIDS
AB - Derivations of Young's equation have traditionally neglected the Laplace pressure and its influence on the curvature of sessile droplets under thermodynamic equilibrium. Omission of the Laplace pressure results in overestimating the line tension by several orders of magnitude and contributes to significant errors in predicting the contact angle for droplet volumes ranging from micro-liters to atto-liters. This paper addresses this issue and offers a correct inclusion of VdP as a virtual work term in the free energy variation at the liquid-vapor boundary for both flat and curved surfaces. While the Laplace pressure is constant at the liquid-vapor interface as a condition of equilibrium, the variation of the Laplace pressure is not zero, as it influences both the shape (spherical cap) and contact angle of sessile droplets. Inclusion of this term leads naturally to a definition of the line tension as a volume dependent term, and more importantly to a correct prediction in both sign and magnitude of the line tension value. The inclusion of VdP work predicts a cubic relationship between the cosine of the contact angle and droplet line radius. This new model extends existing theories on the behavior of nanosized droplets and its predictions exhibit quantitative agreement with experimental results for nonane, dodecane, fullerene, and glycerol trioleate over a range of 15 orders of magnitude in droplet volume. Finally, we also theorize the existence of two different equilibrium contact angles at lower droplet volumes. These two values diverge with the inverse line radius.
DA - 2019/5/1/
PY - 2019/5/1/
DO - 10.1016/j.molliq.2019.02.039
VL - 281
SP - 196-203
SN - 1873-3166
ER -
TY - JOUR
TI - Penetration of liquid droplets into hydrophobic fibrous materials under enhanced gravity
AU - Jamali, M.
AU - Vahedi Tafreshi, H.
AU - Pourdeyhimi, B.
T2 - Journal of Applied Physics
AB - In this paper, experimental and numerical simulations were devised to study and formulate the force required for forcing a droplet to penetrate into a thin nonwetting fibrous structure. Due to the complexity of the problem at hand, we considered only thin fibrous structures comprised of parallel or orthogonally layered fibers. The experiments were conducted using ferrofluid droplets placed on electrospun polystyrene fibrous coatings. A permanent magnet was used to apply a body force to the droplets from below, and the assembly was placed on a sensitive scale for measuring the applied force. Numerical simulations were conducted using the Surface Evolver finite element code validated through comparison with dedicated experimental results. We studied how the force needed to initiate droplet spontaneous penetration into a thin fibrous coating varies with varying the volume of the droplet or the geometric properties of the coating. Using a combination of simulation results and experimental observations, easy-to-use but approximate expressions were derived and used to predict the force required to initiate droplet spontaneous penetration into the above-mentioned fibrous material. These analytical expressions allow one to circumvent the need for running a numerical simulation for each and every droplet–coating combination of interest and thereby expand the application of our work to conditions different from those considered here.
DA - 2019/4/14/
PY - 2019/4/14/
DO - 10.1063/1.5092227
VL - 125
IS - 14
SP - 145304
J2 - Journal of Applied Physics
LA - en
OP -
SN - 0021-8979 1089-7550
UR - http://dx.doi.org/10.1063/1.5092227
DB - Crossref
ER -
TY - JOUR
TI - Polymers Containing Non-Covalently Bound Cyclodextrins
AU - Tonelli, Alan E.
T2 - POLYMERS
AB - We summarize and review the formation, characterization, behaviors, and possible uses of polymers that are threaded through, but only partially covered by cyclodextrins (CDs), which we call non-stoichiometric polymer–CD inclusion compounds (ICs) or non-stoichiometric (n-s) polymer–CD ICs. Emphasis is placed on comparison of the behaviors of unthreaded neat polymers with those that are threaded through and partially covered by CDs. These comparisons lead to several suggested uses for (n-s) polymer–CD ICs.
DA - 2019/3/5/
PY - 2019/3/5/
DO - 10.3390/polym11030425
VL - 11
IS - 3
SP -
SN - 2073-4360
KW - polymers
KW - cyclodextrins
KW - non-stoichiometric inclusion complexes
ER -
TY - JOUR
TI - Mordant inspired wet-spinning of graphene fibers for high performance flexible supercapacitors
AU - He, Nanfei
AU - Shan, Weitao
AU - Wang, Julia
AU - Pan, Qin
AU - Qu, Jiangang
AU - Wang, Guofeng
AU - Gao, Wei
T2 - JOURNAL OF MATERIALS CHEMISTRY A
AB - Al3+ coagulated wet-spun graphene fibers show a large surface area and high electrical conductivity, resulting in large capacitance.
DA - 2019/3/28/
PY - 2019/3/28/
DO - 10.1039/c8ta12337c
VL - 7
IS - 12
SP - 6869-6876
SN - 2050-7496
ER -
TY - JOUR
TI - Industrial-scale fabrication of an osteogenic and antibacterial PLA/silver-loaded calcium phosphate composite with significantly reduced cytotoxicity
AU - Cai, Shaobo
AU - Pourdeyhimi, Behnam
AU - Loboa, Elizabeth G.
T2 - JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
AB - Abstract In this study, we report an industrial‐scale fabrication method of a multifunctional polymer composite as a scaffold material for bone tissue engineering. This study successfully demonstrated the potential of applying industrial polymer processing technologies to produce specially functionalized tissue engineering scaffolds. With the inclusion of a newly synthesized multifunctional additive, silver‐doped‐calcium phosphate (silver‐CaP), the composite material exhibited excellent osteogenic inducibility of human adipose‐derived stem cells (hASC) and satisfactory antibacterial efficacy against Escherichia coli and Staphylococcus aureus . Also, relative to previously reported methods of direct loading silver particles into polymeric materials, our composite exhibited significantly reduced silver associated cytotoxicity. The enhanced biocompatibility could be a significant advantage for materials to be used for regenerative medicine applications where clinical safety is a major consideration. The impact of different silver loading methodologies on hASC’ osteogenic differentiation was also studied. Overall, the results of this study indicate a promising alternative approach to produce multifunctional scaffolds at industrial‐scale with higher throughput, lower cost, and enhanced reproducibility. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater 107B: 900–910, 2019.
DA - 2019/5//
PY - 2019/5//
DO - 10.1002/jbm.b.34185
VL - 107
IS - 4
SP - 900-910
SN - 1552-4981
KW - industrial-scale fabrication
KW - multifunctional scaffold
KW - osteogenic
KW - antibacterial
KW - reduced cytotoxicity
ER -
TY - JOUR
TI - Advanced ZnSnS3@rGO Anode Material for Superior Sodium-Ion and Lithium-Ion Storage with Ultralong Cycle Life
AU - Jia, Hao
AU - Dirican, Mahmut
AU - Sun, Na
AU - Chen, Chen
AU - Yan, Chaoyi
AU - Zhu, Pei
AU - Dong, Xia
AU - Du, Zhuang
AU - Cheng, Hui
AU - Guo, Jiansheng
AU - Zhang, Xiangwu
T2 - CHEMELECTROCHEM
AB - Abstract A novel and facile approach has been utilized to synthesize zinc tin sulfide@reduced graphene oxide (ZnSnS 3 @rGO) through aqueous reaction of Na 2 SnO 3 and Zn(CH 3 COO) 2 , combined with a subsequent solvothermal reaction and an annealing process. The as‐prepared ZnSnS 3 @rGO nanocomposite exhibited an excellent sodium‐ and lithium‐ion‐storage performance with large specific capacity, high rate capability, and ultralong cycle life. When used in Na‐ion cells, the ZnSnS 3 @rGO nanocomposite delivered a capacity of 472.2 mAh g −1 at 100 mA g −1 and retained a specific capacity of 401.2 mAh g −1 after 200 cycles. In Li‐ion cells, the ZnSnS 3 @rGO nanocomposite delivered a capacity of 959.2 mAh g −1 at a current density of 100 mA g −1 and maintained a specific capacity of 551.3 mAh g −1 at a high current density of 1 A g −1 upon 500 cycles. The electrochemical performance results reveal that the integration of uniformly dispersed metal elements and an interconnected carbon matrix could help release the stress of volumetric excursion and provide fast electron/ion transport, leading to a remarkable electrochemical performance.
DA - 2019/2/15/
PY - 2019/2/15/
DO - 10.1002/celc.201801333
VL - 6
IS - 4
SP - 1183-1191
SN - 2196-0216
UR - https://publons.com/publon/26924629/
KW - anode
KW - lithium-ion battery
KW - reduced graphene oxide
KW - sodium-ion battery
KW - zinc tin sulfide
ER -
TY - JOUR
TI - The role of staple fiber length on the performance of carded, hydroentangled nonwovens produced with splittable fibers
AU - Tabors, Jordan
AU - Wust, Carl
AU - Pourdeyhimi, Behnam
T2 - JOURNAL OF ENGINEERED FIBERS AND FABRICS
AB - Carding is a common web-forming process used for staple fibers in the nonwovens industry. Carded webs can be produced with bicomponent staple fibers designed to split into fine fibers. Splittable bicomponent fibers offer benefits such as increased surface area, improved hand, decreased pore size, improved cover, and enhanced strength. Splittable bicomponent fibers within carded webs can be split and bonded utilizing high-pressure water jets during the hydroentangling process. Staple fibers may be produced in many different lengths. However, the effect of staple fiber length on the nonwoven carding process and structure–property relationships of carded, hydroentangled nonwoven fabrics composed of splittable bicomponent fibers is not well understood. During this research, polyester/polyethylene 16-segmented pie, bicomponent fibers with lengths ranging from 2.54 to 15.24 cm were produced, carded and bonded by hydroentangling. All fiber lengths used during this research were successfully carded, and no significant challenges were observed during carding. Fabric performance was evaluated with air permeability and burst strength testing. Data sets were statistically evaluated with one-way and two-way analysis of variance to determine whether fiber length significantly affected fabric structure and properties. In general, the solid volume fraction and air permeability of the samples were affected by fiber length. However, fiber length did not strongly affect the burst strength of hydroentangled fabrics.
DA - 2019///
PY - 2019///
DO - 10.1177/1558925019832526
VL - 14
ER -
TY - JOUR
TI - A novel approach to investigating frictional electrification and charge decay on woven textile fabrics treated with ionic antistatic and hydrophilic surface finishes
AU - Jasti, Vamsi K.
AU - Seyam, Abdel-Fattah M.
AU - Oxenham, William
AU - Theyson, Thomas
T2 - JOURNAL OF THE TEXTILE INSTITUTE
AB - The results of a study of charge generation and decay for range of woven fabrics from ring spun cotton yarns, ring spun polyester yarns, and flat continuous filament polyester yarns treated with topical finishes are reported. The topical finishes include commercially available ionic antistatic finishes, one commercially available hydrophilic finish, and a new experimental moisture management finish. The fabrics were rubbed against surface of steel and Polytetrafluoroethylene (PTFE; Teflon®) and their frictional electrification and charge dissipation were monitored. It is shown that fabrics from cotton have a more rapid inherent charge decay than fabrics from polyester. Ionic antistatic finishes are shown to be effective in reducing charge generation and promoting charge decay and this is particularly true for the fabrics made from filament polyester. When commercially available and experimental hydrophilic finishes were applied on fabrics made from filament polyester, less charge was generated and the generated charge decayed quickly compared to the control untreated fabrics. In an attempt to understand the mechanism of charge decay, two probes were used with one placed on the top of the rubbed area and the other placed some distance from the rubbed area. It was found that the generated charge migrated from the rubbed areas to other parts of the sample. This behavior is more pronounced for fabrics treated with hydrophilic and moisture management finishes, which cause the charge to decay exponentially.
DA - 2019/3/4/
PY - 2019/3/4/
DO - 10.1080/00405000.2018.1507703
VL - 110
IS - 3
SP - 338-348
SN - 1754-2340
KW - Triboelectric charge
KW - charge decay
KW - surface potential
KW - topical finishes
KW - antistatic
ER -
TY - JOUR
TI - Low-cost Schiff bases chromophores as efficient co-sensitizers for MH-13 in dye-sensitized solar cells
AU - Abdel-Shakour, M.
AU - El-Said, Waleed A.
AU - Abdellah, Islam M.
AU - Su, Rui
AU - El-Shafei, Ahmed
T2 - Journal of Materials Science: Materials in Electronics
DA - 2019/2/11/
PY - 2019/2/11/
DO - 10.1007/s10854-019-00806-2
VL - 30
IS - 5
SP - 5081-5091
J2 - J Mater Sci: Mater Electron
LA - en
OP -
SN - 0957-4522 1573-482X
UR - http://dx.doi.org/10.1007/s10854-019-00806-2
DB - Crossref
ER -
TY - JOUR
TI - Facile synthesis of a novel, highly effective, more sustainable and cost-effective cationic bleach activator for cotton: N-[4-(N,N,N)-triethylammoniumchloride-butyryl] caprolactam
AU - Altay, Pelin
AU - Hauser, Peter J.
AU - Gursoy, Nevin Cigdem
AU - El-Shafei, Ahmed
T2 - CELLULOSE
DA - 2019/3//
PY - 2019/3//
DO - 10.1007/s10570-018-02224-9
VL - 26
IS - 4
SP - 2849-2860
SN - 1572-882X
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85060697399&partnerID=MN8TOARS
KW - Peracetic acid
KW - Low temperature bleaching
KW - Hydrogen peroxide
KW - N-[4-(N
KW - N
KW - N)-triethylammoniumchloride-butyryl] caprolactam
KW - TBUCC
ER -
TY - JOUR
TI - High strain rate compressive response of the C-f/SiC composite
AU - Luan, Kun
AU - Liu, Jianjun
AU - Sun, Baozhong
AU - Zhang, Wei
AU - Hu, Jianbao
AU - Fang, Xiaomeng
AU - Ming, Chen
AU - Song, Erhong
T2 - CERAMICS INTERNATIONAL
AB - Carbon fiber reinforced ceramic owns the properties of lightweight, high fracture toughness, excellent shock resistance, and thus overcomes ceramic's brittleness. The researches on the advanced structure of astronautics, marine have exclusively evaluated the quasi-static mechanical response of carbon fiber reinforced ceramics, while few investigations are available in the open literature regarding elastodynamics. This paper reports the dynamic compressive responses of a carbon fiber reinforced silicon carbide (Cf/SiC) composite (CFCMC) tested by the material test system 801 machine (MTS) and the split Hopkinson pressure bar (SHPB). These tests were to determine the rate dependent compression response and high strain rate failure mechanism of the Cf/SiC composite in in-plane and out-plane directions. The in-plane compressive strain rates are from 0.001 to 2200 s−1, and that of the out-plane direction are from 0.001 to 2400 s−1. The compressive stress-strain curves show the Cf/SiC composite has a property of strain rate sensitivity in both directions while under high strain rate loadings. Its compressive stiffness, compressive stress, and corresponding strain are also strain rate sensitive. The compressive damage morphologies after high strain rate impacting show different failure modes for each loading direction. This study provides knowledge about elastodynamics of fiber-reinforced ceramics and extends their design criterion with a reliable evaluation while applying in the scenario of loading high strain rate.
DA - 2019/4/15/
PY - 2019/4/15/
DO - 10.1016/j.ceramint.2018.12.174
VL - 45
IS - 6
SP - 6812-6818
SN - 1873-3956
KW - Ceramic matrix composite
KW - Compression
KW - Strain rate sensitivity
KW - Energy absorption
KW - Damage morphology
ER -
TY - JOUR
TI - Molecular engineering and investigation of new efficient photosensitizers/co-sensitizers based on bulky donor enriched with EDOT for DSSCs
AU - Abdellah, Islam M.
AU - Koraiem, Ahmed I.
AU - El-Shafei, Ahmed
T2 - Dyes and Pigments
AB - Herein, we report design, synthesis and photovoltaic performance of four novel metal-free heteroaromatic photosensitizers coded IA 1-4 with (D-D)2-D-A architecture carrying electron donating triphenylamine coupled with EDOT core which is directly connected to four different electron withdrawing/anchoring groups, viz. rhodamine-3-acetic acid, cyano acetic acid, 2-methyl quinoline-6-carboxylic acid and 1-phenyl-pyrazol-5-one-3-carboxylic acid without any π-spacer. The newly designed IA 1-4 were applied as sensitizers and co-sensitizers in DSSCs. Their structures were confirmed by FT-IR, 1H NMR, MS and elemental analyses. The photosensitizers were subjected to optical and electrochemical studies in order to investigate their absorption/emission behavior as well as HOMO/LUMO energies. The UV–Vis revealed that IA 1-4 exhibited at 464, 497, 531 and 412 nm,λmax respectively. Their optical band gap is in the range of 1.95–2.28 eV. From the energy level diagram of the named photosensitizer, it is clear that all the dyes have good thermodynamically favorable ground and excited state oxidation potentials for electron injection into CB edge of TiO2 as well as dye regeneration. The photovoltaic performance studies indicate that, dye IA-1 anchored with cyanoacetic acid displayed the highest IPCE (61.5%), resulting in PCE of 5.92% (JSC = 12.3 mA cm−2, VOC = 0.68 V, FF = 70.29%). Furthermore, when IA-1 was used as a co-sensitizer with MH-13, a total PCE of 8.43% (JSC = 22.8 mA cm−2, VOC = 0.66 V, FF = 54.1%) was achieved to gain more insights into the equilibrium molecular geometry (EMG), thermodynamic parameters and vertical electronic excitation, DFT studies were performed using GAUSSIAN 09 software to calculate the EMG of each photosensitizer, its and electron cloud delocalization of HOMO/LUMO levels and vertical electronic excitation. Results from FMO revealed that dyes IA 1-4 showed effective charge separation, which translated into greater ICT behavior with IA-1 being the highest in photovoltaic performance.
DA - 2019/5//
PY - 2019/5//
DO - 10.1016/j.dyepig.2019.01.035
VL - 164
SP - 244-256
J2 - Dyes and Pigments
LA - en
OP -
SN - 0143-7208
UR - http://dx.doi.org/10.1016/j.dyepig.2019.01.035
DB - Crossref
KW - Bulky donor
KW - Suzuki coupling
KW - Photosensitizers
KW - Dye solar cells
KW - Co-sensitization
KW - HOMO/LUMO
KW - Photovoltaic
ER -
TY - JOUR
TI - Novel Membranes Regenerated from Blends of Cellulose/Gluten Using Ethylenediamine/Potassium Thiocyanate Solvent System
AU - Yu, Yang
AU - Boy, Ramiz
AU - Kotek, Richard
T2 - JOURNAL OF RENEWABLE MATERIALS
AB - Current industrial methods for dissolution of cellulose in making regenerated cellulose products are relatively expensive, toxic and dangerous and have environmental problems coming with the hazard chemical wastes. To solve t... | Find, read and cite all the research you need on Tech Science Press
DA - 2019/1//
PY - 2019/1//
DO - 10.32604/jrm.2019.00105
VL - 7
IS - 1
SP - 41-55
SN - 2164-6341
KW - Cellulose
KW - gluten
KW - blended film
KW - novel
KW - ED/KSCN solvent
KW - physical and mechanical properties
ER -
TY - JOUR
TI - Synthesis and Encapsulation of a New Zinc Phthalocyanine Photosensitizer into Polymeric Nanoparticles to Enhance Cell Uptake and Phototoxicity
AU - Mehraban, Nahid
AU - Musich, Phillip R.
AU - Freeman, Harold S.
T2 - APPLIED SCIENCES-BASEL
AB - Efforts to enhance the utility of photodynamic therapy as a non-invasive method for treating certain cancers have often involved the design of dye sensitizers with increased singlet oxygen efficiency. More recently, however, sensitizers with greater selectivity for tumor cells than surrounding tissue have been targeted. The present study provides an approach to the modification of the known photosensitizer zinc phthalocyanine (ZnPc), to enhance its solubility and delivery to cancer cells. Targeting a photosensitizer to the site of action improves the efficacy of the sensitizer in photodynamic therapy. In this work we used PLGA-b-PEG to encapsulate a new zinc phthalocyanine derivative, 2(3), 9(10), 16(17), 23(24)-tetrakis-(4’-methyl-benzyloxy) phthalocyanine zinc(II) (ZnPcBCH3), to enhance uptake into A549 cells, a human lung cancer cell line. ZnPcBCH3 exhibited the same photochemical properties as the parent compound ZnPc but gave increased solubility in organic solvents, which allowed for efficient encapsulation. In addition, the encapsulated dye showed a near 500-fold increase in phototoxicity for A549 cancer cells compared to free dye.
DA - 2019/2/1/
PY - 2019/2/1/
DO - 10.3390/app9030401
VL - 9
IS - 3
SP -
SN - 2076-3417
KW - PDT photosensitizer
KW - phthalocyanine derivative
KW - PLGA-b-PEG nanoparticles
KW - phototoxicity
ER -
TY - JOUR
TI - Nanostructured GaOOH modified with reactive yellow, red and blue water-soluble dyes
AU - Adams, W. Taylor
AU - Vinueza, Nelson R.
AU - Romanyuk, Oleksandr
AU - Gordeev, Ivan
AU - Paskova, Tania
AU - Ivanisevic, Albena
T2 - AIP ADVANCES
AB - Water soluble reactive dyes are used to modify nanostructured GaOOH. The resulting particles showed excellent stability in water solutions. The materials were characterized by Scanning electron microscopy (SEM) and X-ray Photoelectron Spectroscopy (XPS) to assess changes due to the dye functionalization. SEM revealed changes in size after dye modification. XPS confirmed the presence of the dyes on the nanostructured materials and assessed changes in functional groups due to use of different type of modification and concentrations of dyes. The reported approach to stabilize the nanostructured GaOOH provides a simple and environmentally friendly route to tune the properties of wide band gap semiconductor materials.
DA - 2019/2//
PY - 2019/2//
DO - 10.1063/1.5080353
VL - 9
IS - 2
SP -
SN - 2158-3226
ER -
TY - JOUR
TI - Real-time impact damage sensing and localization in composites through embedded aligned carbon nanotube sheets
AU - Aly, Karim
AU - Bradford, Philip D.
T2 - COMPOSITES PART B-ENGINEERING
AB - Carbon nanotubes (CNTs) have shown potential as a good candidate for performing strain and damage sensing in composites, however, the number of studies that have examined CNTs piezoresistive response under impact is limited. This paper investigates a novel technique for real-time damage sensing during and after impact strikes on composite laminates. In this technique, aligned CNT sheets layers are distributed through the thickness to monitor the developing damage in the host structure's impact side, mid-plane and non-impact side. This is accomplished through measuring the CNT sheets' in-plane electrical resistance changes simultaneously and linking them to the impact damage modes in the structure. The experimental results demonstrate the CNT layers' ability to detect, locate and quantify impact damage when the host structure undergoes different types of impacts. The results highlight the CNT sensing layers high sensitivity to damage accumulation.
DA - 2019/4/1/
PY - 2019/4/1/
DO - 10.1016/j.compositesb.2018.12.104
VL - 162
SP - 522-531
SN - 1879-1069
UR - https://doi.org/10.1016/j.compositesb.2018.12.104
KW - Polymer-matrix composites (PMCs)
KW - Impact behavior
KW - Electrical properties
KW - Mechanical testing
ER -
TY - JOUR
TI - Synthesis, optical characterization, and TD-DFT studies of novel mero/bis-mero cyanine dyes based on N-Bridgehead heterocycles
AU - Koraiem, Ahmed I.
AU - Abdellah, Islam M.
AU - El-Shafei, Ahmed
AU - Abdel-Latif, Fathy F.
AU - Abd El-Aal, Reda M.
T2 - Canadian Journal of Chemistry
AB - Novel mero/bis-mero cyanine dyes based on N-Bridgehead imidazo[1,2-g]quinolino[2,1-a][2,6]naphthyridine have been synthesized and characterized to evaluate intramolecular charge transfer (ICT) effect on the energy gap (E 0-0 ). The UV–vis and emission spectral studies revealed that dyes are absorbed in the region of λ max 485–577 nm and emitted at 567–673 nm. Their solvatochromic behavior in solvents of various polarities, CCl 4, C 6 H 6, H 2 O, CHCl 3, acetone, and DMF, was studied to emphasize the effect of solvent polarity on the absorption maxima, molar extinction coefficients of the dyes, and excitation energy of the dyes. Their electron cloud delocalization in HOMO/LUMO levels were studied by DFT using Gaussian 09 software. Time-dependent density functional theory (TD-DFT) was applied to theoretically explore the first excitation energy (E 0-0 ) of these dyes, which was in good agreement with experimental results.
DA - 2019/3//
PY - 2019/3//
DO - 10.1139/cjc-2018-0325
VL - 97
IS - 3
SP - 219-226
J2 - Can. J. Chem.
LA - en
OP -
SN - 0008-4042 1480-3291
UR - http://dx.doi.org/10.1139/cjc-2018-0325
DB - Crossref
KW - mero cyanine
KW - TD-DFT calculations
KW - solvatochromic behavior
KW - photo-physical properties.
ER -
TY - JOUR
TI - Inkjet Process for Conductive Patterning on Textiles: Maintaining Inherent Stretchability and Breathability in Knit Structures
AU - Kim, Inhwan
AU - Shahariar, Hasan
AU - Ingram, Wade F.
AU - Zhou, Ying
AU - Jur, Jesse S.
T2 - ADVANCED FUNCTIONAL MATERIALS
AB - Abstract In this work, a novel technique of inkjet printing e‐textiles with particle free reactive silver inks on knit structures is developed. The inkjet‐printed e‐textiles are highly conductive, with a sheet resistance of 0.09 Ω sq ‐1 , by means of controlling the number of print passes, annealing process, and textile structures. It is notable that the inkjet process allows textiles to maintain its inherent properties, including stretchability, flexibility, breathability, and fabric hand after printing process. This is achieved by formation of ultrathin silver layers surrounding individual fibers. The silver layers coated on fibers range from 250 nm to 2.5 µm, maintaining the size of interstices and flexibility of fibers. The annealing process, structure of fibers, and printed layers significantly influence the electrical conductivity of the patterned structures on textiles. Outstanding electrical conductivity and durability are demonstrated by optimizing print passes, controlling textile structures, and incorporating an in situ annealing process. The electrical resistance dependence on the strain rate of the textiles is examined, showing the ability to maintain electrical conductivity to retain light‐emitting diode use, stable more than 500 consecutive strain cycles. Most importantly, inkjet‐printed e‐textiles maintain their characteristic washability, breathability, and fabric hands for applications in wearable technology.
DA - 2019/2/14/
PY - 2019/2/14/
DO - 10.1002/adfm.201807573
VL - 29
IS - 7
SP -
SN - 1616-3028
UR - http://dx.doi.org/10.1002/adfm.201807573
KW - e-textiles
KW - flexible electronics
KW - inkjet printing
KW - reactive silver ink
KW - ultrathin coating
ER -
TY - JOUR
TI - Inkjet Printing of Reactive Silver Ink on Textiles
AU - Shahariar, Hasan
AU - Kim, Inhwan
AU - Soewardiman, Henry
AU - Jur, Jesse S.
T2 - ACS APPLIED MATERIALS & INTERFACES
AB - Inkjet printing of functional inks on textiles to embed passive electronics devices and sensors is a novel approach in the space of wearable electronic textiles. However, achieving functionality such as conductivity by inkjet printing on textiles is challenged by the porosity and surface roughness of textiles. Nanoparticle-based conductive inks frequently cause blockage/clogging of inkjet printer nozzles, making it a less than ideal method for applying these functional materials. It is also very challenging to create a conformal conductive coating and achieve electrically conductive percolation with the inkjet printing of metal nanoparticle inks on rough and porous textile and paper substrates. Herein, a novel reliable and conformal inkjet printing process is demonstrated for printing particle-free reactive silver ink on uncoated polyester textile knit, woven, and nonwoven fabrics. The particle-free functional ink can conformally coat individual fibers to create a conductive network within the textile structure without changing the feel, texture, durability, and mechanical behavior of the textile. It was found that the conductivity and the resolution of the inkjet-printed tracks are directly related with the packing and the tightness of fabric structures and fiber sizes of the fabrics. It is noteworthy that the electrical conductivity of the inkjet-printed conductive coating on pristine polyethylene terephthalate fibers is improved by an order of magnitude by in situ heat-curing of the textile surface during printing as the in situ heat-curing process minimizes the wicking of the ink into the textile structures. A minimum sheet resistance of 0.2 ± 0.025 and 0.9 ± 0.02 Ω/□ on polyester woven and polyester knit fabrics is achieved, respectively. These findings aim to advance E-textile product design through integration of inkjet printing as a low-cost, scalable, and automated manufacturing process.
DA - 2019/2/13/
PY - 2019/2/13/
DO - 10.1021/acsami.8b18231
VL - 11
IS - 6
SP - 6208-6216
SN - 1944-8252
KW - E-textiles
KW - inkjet printing
KW - particle freereactive ink
KW - silver coating
KW - conductive pattern
KW - bending
KW - washability
ER -
TY - JOUR
TI - Molecular and excited state properties of photostable anthraquinone blue dyes for hydrophobic fibers
AU - Ding, Yi
AU - Mehraban, Nahid
AU - Szymczyk, Malgorzata
AU - Parrillo-Chapman, Lisa
AU - El-Shafei, Ahmed
AU - Freeman, Harold S.
T2 - JOURNAL OF MOLECULAR STRUCTURE
AB - Abstract Synthetic dyes having high photostability on hydrophobic fibers such as poly(ethylene terephthalate) (PET) are of interest for use on textile substrates for outdoor applications. While much is known about photostable dyes developed for PET in the 1980s, owing to their viability for use in automobile interiors, little has been published on currently viable photostable disperse dyes. As part of an effort to help fill this void and to facilitate future photostable disperse dye design, the present study involved the use of experimental measurements and modelling studies to help characterize the molecular structures of commercially viable dyes for producing photostable colors on PET fibers, beginning with a pair of blue dyes. With the aid of HR-MS, 500 MHz 1H NMR, and X-ray crystallography, it was established that the two dyes are structural isomers having 1,5-(OH)2-anthraquinone (AQ) and 1,8-(OH)2-AQ base structures. It is proposed that the photostability of these dyes arises from the presence of multiple OH/NH groups ortho to the AQ C O groups which enables them to dissipate excited state energy through intramolecular proton transfer. Further, using DFT-based molecular modelling studies, it was shown that the dye having the 1,5-(OH)2-AQ base structure has a lower ESOP than the isomeric dye having the 1,8-(OH)2-AQ base structure. Similarly, results from calculating Frontier HOMO and LUMO isosurfaces indicated that the LUMO lobes of the latter dye are larger, suggesting that this dye undergoes excitation faster than the 1,5-(OH)2-AQ isomer.
DA - 2019/4/5/
PY - 2019/4/5/
DO - 10.1016/j.molstruc.2018.12.070
VL - 1181
SP - 109-117
SN - 1872-8014
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85059631897&partnerID=MN8TOARS
KW - Anthraquinone disperse dyes
KW - Intramolecular H-bonding
KW - Structural analysis
KW - X-ray crystallography
KW - Molecular modelling
ER -
TY - JOUR
TI - Melt-spun PLA liquid-filled fibers: physical, morphological, and thermal properties
AU - Naeimirad, Mohammadreza
AU - Zadhoush, Ali
AU - Neisiany, Rasoul Esmaeely
AU - Salimian, Saeed
AU - Kotek, Richard
T2 - JOURNAL OF THE TEXTILE INSTITUTE
AB - PLA hollow fibers with different internal diameters were produced as a media for liquid encapsulation via high-speed melt-spinning process, changing important parameters (e.g. material type, polymer throughput, extrusion temperature, quench flow rate, drawing ratio, and winding speed). Morphological analysis showed 300% increment (linear mode) for internal and outer diameters by increasing the polymer throughput from 14.6 to 87.6 ml/min while raising the winding speed from 500 to 1500 m/min resulted in decreasing 70 and 75% for internal and external diameters, respectively. Quench flow rate and extrusion temperature showed lower effect on just internal diameter. XRD patterns indicated that using higher drawing ratio led to increase in the fiber crystallinity. According to the physical studies, although the linear density was duplicated about 10 times by increasing the polymer throughput, but the winding speed reduced 300%. Adding the polymer throughput, as the main factor, caused the tensile strength, elongation at break, modulus, tenacity, and fracture toughness to be changed approximately +650%,+217%, –68%, –58%, and +1500%, respectively. Other parameters also influenced (described in text) on tensile performances. Thermal analysis showed lower thermal stability for the fibers extruded at higher temperature. DSC results also confirmed the same trend in the degree of crystallinity of the melt-spun fibers. Melt-spun fibers were filled with glycerol as a model liquid using the previously developed microfluidic approach. Biodegradable liquid-filled fibers were conducted on composting test. Successful biodegradation is a promising result for potential applications such as agriculture pesticide and medical drug delivery.
DA - 2019/1/2/
PY - 2019/1/2/
DO - 10.1080/00405000.2018.1465336
VL - 110
IS - 1
SP - 89-99
SN - 1754-2340
KW - PLA hollow fibers
KW - melt-spinning
KW - biodegradable
KW - microfluidics
KW - liquid-filled fiber
ER -
TY - JOUR
TI - Hybrid Carbon Nanotube Fabrics with Sacrificial Nanofibers for Flexible High Performance Lithium-Ion Battery Anodes
AU - Yildiz, Ozkan
AU - Dirican, Mahmut
AU - Fang, Xiaomeng
AU - Fu, Kun
AU - Jia, Hao
AU - Stano, Kelly
AU - Zhang, Xiangwu
AU - Bradford, Philip D.
T2 - JOURNAL OF THE ELECTROCHEMICAL SOCIETY
AB - Silicon is one of the most promising anode materials for lithium-ion batteries because of its highest known theoretical charge capacity (4,200 mAh g−1). However, it has found limited application in commercial batteries because of the significant volume change (up to 400%) of silicon during cycling, which results in pulverization and capacity fading. Here, we present a new method to develop a silicon - carbon nanotube (CNT) hybrid anode architecture using CNT-polymer nanofiber hybridization method. The anode material is produced by electrospinning PMMA-Si nanofibers onto aligned CNT sheets, which are drawn on a grounded, rotating take-up roller, and then subsequently decomposing the PMMA electrospun fibers at elevated temperature to create a uniform distribution of Si particles within the CNT sheets. The whole structure is then coated with pyrolytic carbon via chemical vapor deposition (CVD). The architecture provides sufficient space to accommodate the volume expansion of the Si nanoparticles. The CVD pyrolytic carbon coating helps to anchor the Si nanoparticles within CNT sheets and stabilize solid-electrolyte-interface (SEI) formation. The novel freestanding, binder free CNT-Si-C sheet hybrid exhibited improved performance in terms of excellent cycling capacity (1470 mAh g−1), high coulombic efficiency (98%), and good capacity retention of 88% after 150 cycles.
DA - 2019/2/9/
PY - 2019/2/9/
DO - 10.1149/2.0821902jes
VL - 166
IS - 4
SP - A473-A479
SN - 1945-7111
UR - https://publons.com/publon/26924627/
ER -
TY - JOUR
TI - Hydroentanglement of Polymer Nonwovens 2: Simulation of multiple polymer fibers and prediction of entanglement
AU - Li, Gen
AU - Staszel, Christopher
AU - Yarin, Alexander L.
AU - Pourdeyhimi, Behnam
T2 - POLYMER
AB - The dynamic model of polymer fibers in hydroentanglement process developed in Part 1 (G. Li, C. Staszel, A.L. Yarin, B. Pourdeyhimi. Hydroentanglement of Polymer Nonwovens. 1: Experimental and theoretical/numerical framework) is generalized here to simulate simultaneous evolution and entanglement of multiple fibers. The fiber-fiber entanglement morphologies are established and the number of entanglements predicted as a function of time. The results of the experiments of Part 1 are compared with the numerical predictions based on the present model. It is shown that the model can successfully be used to describe hydroentanglement of nonwovens. The thickness reduction and the increase in the number of entanglements are predicted for different velocities of water jets.
DA - 2019/2/15/
PY - 2019/2/15/
DO - 10.1016/j.polymer.2018.11.004
VL - 164
SP - 205-216
SN - 1873-2291
ER -
TY - JOUR
TI - Hydroentanglement of polymer nonwovens. 1: Experimental and theoretical/numerical framework
AU - Li, Gen
AU - Staszel, Christopher
AU - Yarin, Alexander L.
AU - Pourdeyhimi, Behnam
T2 - POLYMER
AB - Hydroentanglement is a versatile and important process used to form highly entangled nonwoven materials comprised of polymer fibers. It is a key element of polymer processing in the world, with the nonwovens market worth of tens of billions of the US dollars. No fundamental theoretical models of hydroentanglement were available so far, even though such modeling is required to facilitate the entirely empirical efforts to optimize the process. No model experiments on hydroentanglement aiming at its underlying physics were conducted either. These challenging problems are in focus in the present work. A model experiment is conducted and a quasi-one-dimensional model of individual polymer fibers is proposed and implemented for a number of fibers subjected to water jets impacting as a curtain normally to the nonwoven surface and undergoing filtration motion in the inter-fiber pores. The nonwoven is assumed to be located on a moving substrate with water suction through it. The model allows for a number of two-dimensional water jets and a number of suction ports in the substrate. The quasi-one-dimensional model allows for the three-dimensional motion of individual viscoelastic polymer fibers and the fiber-fiber interaction, which makes them non-self-intersecting. Then, the governing quasi-one-dimensional equations of fiber motion are discretized and solved numerically by using a discrete element method with mesh refinement of the Lagrangian mesh during the time marching. Using the developed code, several basic model problems were solved. Specifically, the behavior of several viscoelastic polymer fibers under the action of water jets with and without fiber-fiber interaction is described. Accordingly, a quantitative measure of the fiber-fiber entanglement is introduced based on the observed morphologies in the accompanying second part of this work.
DA - 2019/2/15/
PY - 2019/2/15/
DO - 10.1016/j.polymer.2018.11.059
VL - 164
SP - 191-204
SN - 1873-2291
ER -
TY - JOUR
TI - Graphene oxide model with desirable structural and chemical properties
AU - Qiao, Qi
AU - Liu, Chang
AU - Gao, Wei
AU - Huang, Liangliang
T2 - CARBON
AB - Due to unique chemical, electrical and optical properties, graphene oxide has been widely used as a promising candidate for many applications. Theoretical GO models developed so far present a good description of its chemical structure. However, when it comes to the structural properties, such as the size and distribution of vacancy defects, the curvature (or roughness), there exist significant gaps between computational models and experimentally synthesized GO materials. In this work, we carry out reactive molecular dynamics simulations and use experimental characteristics to fine tune theoretical GO models. Attentions have been paid to the vacancy defects, the distribution and hybridization of carbon atoms, and the overall C/O ratio of GO. The GO models proposed in this work have been significantly improved to represent quantitative structural details of GO materials synthesized via the modified Hummers method. The temperature-programmed protocol and the computational post analyses of Fourier-transform infrared spectroscopy, X-ray photoelectron spectroscopy, vacancy size and curvature distribution, are of general interest to a broad audience working on GO structures from other synthesis methods and other two-dimensional materials and their composites.
DA - 2019/3//
PY - 2019/3//
DO - 10.1016/j.carbon.2018.11.063
VL - 143
SP - 566-577
SN - 1873-3891
ER -
TY - JOUR
TI - Structure-property relationship of novel monosubstituted Ru (II) complexes for high photocurrent and high efficiency DSSCs: Influence of donor versus acceptor ancillary ligand on DSSCs performance
AU - Abdellah, Islam M.
AU - Koraiem, Ahmed I.
AU - El-Shafei, Ahmed
T2 - Solar Energy
AB - Two novel high molar extinction coefficient monosubstituted-bipy Ru (II) complexes, IA-5 and IA-6, based on D-D-π and π-A-π-A ancillary ligands were synthesized with the aid of Knoevenagel reaction, to study the influence of the electron donor and electron acceptor ancillary ligand and number of anchoring group (COOH) on the light harvesting efficiency (LHE), ground and excited state oxidation potentials, incident-photon-to-current conversion efficiency (IPCE), short-circuit photocurrent density (J), and total solar-to-electric conversion efficiency (%η) for DSSCs, and their device performances were studied and showed a maximum of PCE of 7.81% (JSC = 17.61 mA cm−2, VOC = 0.69 V and FF = 64.05%) for dye IA-6 compared to PCE of 7.74% (JSC = 15.83 mA cm−2, VOC = 0.74 V and FF = 65.37%) for N719 dye. The photophysical and photoelectrochemical properties discussed herein addressed the significant impact of the electron donor and electron acceptor ancillary ligand and the number of anchoring groups on JSC and %η in DSSCs. The molecular structures of IA-5 and IA-6 were characterized using UV–Vis, emission spectrophotometry, FT-IR, ESI-MS, and 1H NMR. To probe the interrelationship between the chemical structure, photophysical and photoelectrochemical properties, molecular modeling studies, implemented in Gaussian, were employed. DFT/TD-DFT calculations were used to calculate the thermodynamics and electronic properties of IA-5 and IA-6 including HOMO and LUMO isosurfaces, lowest singlet-singlet electronic transitions (E0-0), ground and excited states oxidation potentials, GSOP and ESOP, which were in excellent agreement with the experimental results. Surprisingly, the insertion of the strong electron acceptor benzodithiazole in the ancillary ligand of IA-5 showed that the frontier LUMO shifted by 100% from 2,2′-bipyridyl-4,4′-dicarboxlic acid to the ancillary ligand containing benzodithiazole with electron injection accomplished from the anchoring group tethered to benzodithiazole. This new finding of relocating the LUMO from bipy-dicarboxylic acid to the other ancillary ligand would open the door for the molecular engineering of better light harvesting and more efficient Ru (II) complexes for DSSCs.
DA - 2019/1//
PY - 2019/1//
DO - 10.1016/j.solener.2018.11.047
VL - 177
SP - 642-651
J2 - Solar Energy
LA - en
OP -
SN - 0038-092X
UR - http://dx.doi.org/10.1016/j.solener.2018.11.047
DB - Crossref
KW - Dye solar cells
KW - Electron acceptor
KW - Electron donor
KW - Solar-to-electric conversion
KW - Molecular modeling
KW - DFT and TD-DFT
ER -
TY - JOUR
TI - Characterizing nonwoven materials via realistic microstructural modeling
AU - Moghadam, A.
AU - Yousefi, S. H.
AU - Tafreshi, H. Vahedi
AU - Pourdeyhimi, B.
T2 - SEPARATION AND PURIFICATION TECHNOLOGY
AB - A physics-based nonwoven structure generation model is presented in this work. The model is capable of incorporating the mechanical properties of the fibers in the simulations by treating each fiber as an array of beads connected to one another via springs and dampers. Our algorithm can realistically simulate the bending of the fibers at fiber–fiber crossovers or when external forces are applied to the fibers during fiber deposition process. In fact, a unique attribute of the modeling approach presented in this work is that it can be modified to emulate, to some extent, the manufacturing process by which the nonwoven media have been produced. Unlike most previous structure generation models, our mass-spring-damper algorithm does not require the thickness or porosity of the media to be fed to the model as an input, and it is also capable of avoiding fiber–fiber overlaps. For demonstration purposes, virtual media with bimodal fiber diameter or contact angle distributions were produced and used to estimate the pressure required for water to penetrate through a hydrophobic fibrous membrane, i.e., the so-called liquid entry pressure (LEP). The LEP calculations here are based on a simplifying assumption that the air–water interface remains intact across the width of the simulation domain as it travels throughout the media. Effects of fiber diameter(s), fiber orientations, or fiber contact angle(s) on LEP are simulated and discussed in detail.
DA - 2019/3/18/
PY - 2019/3/18/
DO - 10.1016/j.seppur.2018.10.018
VL - 211
SP - 602-609
SN - 1873-3794
KW - Fibrous materials
KW - Realistic modeling
KW - Filter media simulation
KW - Capillarity
ER -
TY - JOUR
TI - Flexible electrolyte-cathode bilayer framework with stabilized interface for room-temperature all-solid-state lithium-sulfur batteries
AU - Zhu, Pei
AU - Yan, Chaoyi
AU - Zhu, Jiadeng
AU - Zang, Jun
AU - Jia, Hao
AU - Dong, Xia
AU - Du, Zhuang
AU - Zhang, Chunming
AU - Wu, Nianqiang
AU - Dirican, Mahmut
AU - Zhang, Xiangwu
AU - Li, Ya
T2 - ENERGY STORAGE MATERIALS
AB - Lithium-sulfur batteries (LSBs) are promising next-generation energy storage system beyond state-of-the-art lithium-ion batteries because of their low cost and high energy density. However, liquid electrolyte-based LSBs suffer from “polysulfide shuttle”, and safety concerns originated from the use of flammable organic electrolytes and the formation of lithium dendrites. Herein, we report a novel bilayer framework through integrating a three-dimensional (3D) carbon nanofiber/sulfur (CNF/S) cathode with one-dimensional (1D) ceramic Li0.33La0.557TiO3 (LLTO) nanofiber-poly(ethylene oxide) (PEO) solid composite electrolyte to serve as both cathode and electrolyte for room-temperature ASSLSBs. The stabilized cycling performance of this novel bilayer structure design lies in the reduced interfacial resistance and enhanced electrode/electrolyte interfacial stability due to the addition of Li+ conducting 1D LLTO nanofibers, as well as the formed fast-continuous electron/ion transportation pathways within the 3D cathode architecture. Meanwhile, the mechanically robust bilayer framework with micro-/meso-pores could also accommodate the large volume change of sulfur during continuous charge-discharge process and help suppress the Li dendrite formation. As a result of the aforementioned benefits of the novel bilayer structure design, the introduced ASSLSBs could deliver a stable cycling performance at room temperature with high Coulombic efficiency of over 99%.
DA - 2019/2//
PY - 2019/2//
DO - 10.1016/j.ensm.2018.11.009
VL - 17
SP - 220-225
SN - 2405-8297
UR - https://publons.com/publon/9539991/
KW - Composite solid electrolyte
KW - All-solid-state batteries
KW - Lithium-sulfur batteries
KW - Lithium dendrite
KW - Room temperature
ER -
TY - JOUR
TI - Structure-property relationships: "Double-tail versus double-flap" ruthenium complex structures for high efficiency dye-sensitized solar cells
AU - Su, Rui
AU - Ashraf, Saba
AU - El-Shafei, Ahmed
T2 - SOLAR ENERGY
AB - Six novel heteroleptic amphiphilic polypyridyl Ruthenium (II) complexes, coded FS01-FS06, with hetero-aromatic electron-donor ancillary ligands containing julolidine-derived moieties were synthesized to investigate the relationship between structure modulations of electron donors of Ru(II) dyes and their photophysical, electrochemical and photovoltaic properties for dye-sensitized solar cells (DSSCs). These modulations include: Ru(II) complexes with double “tails” (i.e. tetramethyl groups attached to the end of julolidine-based antennas, FS04) compared to the ones without double “tails” (FS01); complexes with double small “flaps” (i.e. small acyclic electron donor auxochromes ortho to the CH = CH bridge of stilbazole, FS02, FS05) compared to the ones with double large “flaps” (FS03, FS06). Their low energy metal-to-ligand charge transfers (MLCT) band and molar absorptivities were all better than those of the benchmark, N719. It was also shown that the incorporation of double “flaps” into the ancillary ligands caused a slight red shift of light absorption. The photovoltaic properties were evaluated under 1.5 AM standard illumination condition and compared to N719. The highest photocurrent density (JSC) was observed for the complex with double “tails” and double small “flaps” (FS05). The overall conversion efficiency for devices employing julolidine-derived Ru (II) complexes was in the following order FS05 > FS02 > FS04 > FS01 > FS06 > FS03. FS05 (8.16%) outperformed the benchmark N719 (7.75%) in the photovoltaic performance, which is due to its best light-harvesting ability, highest molar extinction coefficient and smallest energy band gap among all the six dyes. To probe the interrelationship among julolidine-based electron donors of ancillary ligands, photocurrent and photovoltage of these dyes, the equilibrium molecular geometries of the ancillary ligands were calculated using DFT. The equilibrium molecular geometries of these dyes the photocurrent and photovoltage are dependent on the donating effect of alkyloxy auxochromes, the steric effect generated from the auxochromes and julolidine moieties, and the orientation of longer alkyloxy group. The introduction of double “tails” resulted in less dye aggregation and higher charge recombination resistance, leading to higher photocurrents and photovoltages in the solar cell performances. Despite of the donating effect of alkyloxy groups, the bulky double “flaps” mainly jammed the hole transportation between the redox couple of the electrolyte and the HOMO of thiocyanate groups (−NCS), translating into the decrease of photocurrent.
DA - 2019/1/1/
PY - 2019/1/1/
DO - 10.1016/j.solener.2018.11.038
VL - 177
SP - 724-736
SN - 0038-092X
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-85057598963&partnerID=MN8TOARS
KW - DSSC
KW - Ru(II) sensitizer
KW - Julolidine
KW - Photocurrent & photovoltage
KW - Charge transfer blocking
ER -
TY - JOUR
TI - Pretreatment effects on pigment-based textile inkjet printing - colour gamut and crockfastness properties
AU - Ding, Yi
AU - Shamey, Renzo
AU - Chapman, Lisa Parillo
AU - Freeman, Harold S.
T2 - COLORATION TECHNOLOGY
AB - The application of two commercial pretreatment agents, formulated to improve the performance of a six‐colour nano‐scale pigment ink set during the textile inkjet printing of cotton and polyester ( PET ) fabrics, was examined. An industrial scale printer, operating at 55 linear m/h and equipped with Kyocera printheads, was used to print on commercial fabrics (180 cm wide) prepared for digital printing. The work employed an industrial scale rather than a benchtop printer to enhance the utility of the results for a commercial environment. The colorimetric attributes of printed fabrics were recorded for the individual inks as well as for spot colour combinations generated using Dr. Wirth RIPM aster v11 software. Colour table profiles were also generated and the colorimetric values of inks were compared. Colour gamuts of inks on cotton and PET , including three‐dimensional volumes in the CIELab space, were examined to assess the role of pretreatment on the colorimetric properties of the printed substrates. It was found that the pretreatments enhanced the ink receptiveness, colour intensity and colour gamut of fabrics. Pretreatment of cotton resulted in a larger gamut and more vivid colours than on PET. However, wet and dry crockfastness results were found to be low. In this regard, Time‐of‐Flight Secondary Ion Mass Spectrometry analysis of fabrics printed in the presence and absence of pretreatment indicated that the low crockfastness arises from higher pigment levels on the surface of the pretreated fabric.
DA - 2019/2//
PY - 2019/2//
DO - 10.1111/cote.12377
VL - 135
IS - 1
SP - 77-86
SN - 1478-4408
UR - https://doi.org/10.1111/cote.12377
ER -
TY - JOUR
TI - Unique thermo-responsivity and tunable optical performance of poly(N-isopropylacrylamide)-cellulose nanocrystal hydrogel films
AU - Sun, Xiaohang
AU - Tyagi, Preeti
AU - Agate, Sachin
AU - Lucia, Lucian
AU - McCord, Marian
AU - Pal, Lokendra
T2 - CARBOHYDRATE POLYMERS
AB - A hybrid materials system to modulate lower critical solution temperature (LCST) and moisture content for thermo-responsivity and optical tunability was strategically developed by incorporating cellulose nanocrystals (CNCs) into a poly(N-isopropylacrylamide) (PNIPAm) hydrogel matrix. The PNIPAm/CNC hydrogel films exhibit tunable optical properties and wavelength bandpass selectivity as characterized by PROBE Spectroscopy and Dynamic Light Scattering (DLS). Importantly, the micro/nano structures of the PNIPAm/CNC hydrogel films were completely different when dried below and above the LCST. Below the LCST, PNIPAm/CNC hydrogel films exhibit transparency or semi-transparency due to the uniform bonding of hydrophilic PNIPAm and CNC through hydrogen bonds. Above the LCST, the hydrogel films engage in both hydrophobic PNIPAm and hydrophilic CNC interactions due to changes in PNIPAm conformation which lead to light scattering effects and hence opacity. Furthermore, the incorporation of CNC induces a ∼ 15 °C reduction of the LCST relative to pure PNIPAm hydrogel films.
DA - 2019/3/15/
PY - 2019/3/15/
DO - 10.1016/j.carbpol.2018.12.067
VL - 208
SP - 495-503
SN - 1879-1344
KW - Poly(N-isopropylacrylamide)
KW - Cellulose nanocrystals
KW - Hydrogels
KW - Thermal responsive
KW - Transparency
ER -
TY - JOUR
TI - SnS hollow nanofibers as anode materials for sodium-ion batteries with high capacity and ultra-long cycling stability
AU - Jia, Hao
AU - Dirican, Mahmut
AU - Sun, Na
AU - Chen, Chen
AU - Zhu, Pei
AU - Yan, Chaoyi
AU - Dong, Xia
AU - Du, Zhuang
AU - Guo, Jiansheng
AU - Karaduman, Yekta
AU - Wang, Jiasheng
AU - Tang, Fangcheng
AU - Tao, Jinsong
AU - Zhang, Xiangwu
T2 - CHEMICAL COMMUNICATIONS
AB - In this study, a novel anode material of SnS hollow nanofibers (SnS HNFs) was rationally synthesized by a facile process and demonstrated to be a promising anode candidate for sodium-ion batteries. The synergetic effect of unique hollow and porous microstructures of SnS HNFs led to high capacity and ultra-long cycling stability.
DA - 2019/1/14/
PY - 2019/1/14/
DO - 10.1039/c8cc07332e
VL - 55
IS - 4
SP - 505-508
SN - 1364-548X
UR - https://publons.com/publon/2973443/
ER -
TY - JOUR
TI - Hydrothermally synthesised NiCoP nanostructures and electrospun N-doped carbon nanofiber as multifunctional potential electrode for hybrid water electrolyser and supercapatteries
AU - Surendran, Subramani
AU - Shanmugapriya, Sathyanarayanan
AU - Zhu, Pei
AU - Yan, Chaoyi
AU - Vignesh, Ramasamy Hari
AU - Lee, Yun Sung
AU - Zhang, Xiangwu
AU - Selvan, Ramakrishnan Kalai
T2 - ELECTROCHIMICA ACTA
AB - In this work, a facile single-step hydrothermal technique is used to prepare a spherically concomitant foamy NiCoP as positrode for supercapatteries. Similarly, the nitrogen-doped carbon nanofibers are prepared by simple electrospinning technique to use as negatrode. The prepared materials are raptly examined through primary studies for both energy conversion and storage applications. Fascinatingly, NiCoP electrode encourages oxygen evolution reaction, and the carbon nanofiber electrode emboldens hydrogen evolution reaction with the minimum overpotential of 257 mV and 160 mV, respectively. In addition, a supercapattery is designed and operated at a full voltage window of 1.6 V using the fusion of carbon nanofiber as the negatrode and the cutting-edge NiCoP as the positrode, which presents a superior energy (56 Wh kg−1) and an improved power density (5333 W kg−1) with a long cyclic stability (5000 cycles). Finally, the fabricated supercapattery device is used to power the constructed hybrid water electrolyser that requisites a low cell voltage of 1.71 V to afford a current density of 10 mA cm−2. Overall, the prepared electrodes reveal its superiority of handling the multifunctional challenges for both water electrolyzer and supercapatteries.
DA - 2019/2/10/
PY - 2019/2/10/
DO - 10.1016/j.electacta.2018.11.078
VL - 296
SP - 1083-1094
SN - 1873-3859
UR - https://publons.com/publon/21201014/
KW - Supercapattery
KW - Water electrolyzer
KW - Electrospinning
KW - Phosphides
KW - Carbon nanofiber
ER -
TY - JOUR
TI - Properties and Applications of Vapor Infiltration into Polymeric Substrates
AU - Ingram, Wade F.
AU - Jur, Jesse S.
T2 - JOM
DA - 2019/1//
PY - 2019/1//
DO - 10.1007/s11837-018-3157-9
VL - 71
IS - 1
SP - 238-245
SN - 1543-1851
ER -
TY - JOUR
TI - Carbon-enhanced centrifugally-spun SnSb/carbon microfiber composite as advanced anode material for sodium-ion battery
AU - Jia, Hao
AU - Dirican, Mahmut
AU - Aksu, Cemile
AU - Sun, Na
AU - Chen, Chen
AU - Zhu, Jiadeng
AU - Zhu, Pei
AU - Yan, Chaoyi
AU - Li, Ya
AU - Ge, Yeqian
AU - Guo, Jiansheng
AU - Zhang, Xiangwu
T2 - JOURNAL OF COLLOID AND INTERFACE SCIENCE
AB - Antimony tin (SnSb) based materials have become increasingly attractive as a potential anode material for sodium-ion batteries (SIBs) owing to their prominent merit of high capacity. However, cyclic stability and rate capability of SnSb anodes are currently hindered by their large volume change during repeated cycling, which results in severe capacity fading. Herein, we introduce carbon-coated centrifugally-spun [email protected] microfiber (CMF) composites as high-performance anodes for SIBs that can maintain their structural stability during repeated charge-discharge cycles. The centrifugal spinning method was performed to fabricate [email protected] due to its high speed, low cost, and large-scale fabrication features. More importantly, extra carbon coating by chemical vapor deposition (CVD) has been demonstrated as an effective method to improve the capacity retention and Coulombic efficiency of the [email protected] anode. Electrochemical test results indicated that the as-prepared [email protected]@C anode could deliver a large reversible capacity of 798 mA h∙g−1 at the 20th cycle as well as a high capacity retention of 86.8% and excellent Coulombic efficiency of 98.1% at the 100th cycle. It is, therefore, demonstrated that [email protected]@C composite is a promising anode material candidate for future high-performance SIBs.
DA - 2019/2/15/
PY - 2019/2/15/
DO - 10.1016/j.jcis.2018.10.101
VL - 536
SP - 655-663
SN - 1095-7103
UR - https://publons.com/publon/26924626/
KW - Energy storage
KW - Sodium-ion battery
KW - Carbon microfibers
KW - Antimony tin
KW - Composite
KW - Centrifugal spinning
KW - CVD coating
KW - Anode
KW - Cycling stability
KW - Capacity
KW - Rate capability
KW - Coulombic efficiency
ER -
TY - JOUR
TI - Recent progress in polymer materials for advanced lithium-sulfur batteries
AU - Zhu, Jiadeng
AU - Zhu, Pei
AU - Yan, Chaoyi
AU - Dong, Xia
AU - Zhang, Xiangwu
T2 - Progress in Polymer Science
AB - Polymers play essential roles in the research and development of rechargeable batteries, especially, lithium-sulfur (Li-S) batteries which have been considered as a promising candidate of the next-generation power supply mainly because of their high theoretical energy density (up to five-fold compared to state-of-the-art lithium-ion batteries). However, practical applications of Li-S batteries are mainly hindered by the insulating nature of sulfur and its intermediates, the polysulfide shuttle effect, and the formation and growth of lithium dendrites. Polymer materials play an important role in addressing these issues of Li-S batteries and their structures and functionalities can be manipulated to control the electrochemical performance of Li-S batteries (e.g., cylability, rate capability, lifespan, etc.). In this review, we concentrate on the recent development of various polymer materials for Li-S batteries. It starts with a brief introduction of the Li-S battery followed by its fundamental electrochemistry and challenges. Significant attention is then paid to the applications of various polymers in each component of Li-S batteries with a focus on the mechanisms behind their operation which are presented and further discussed from five perspectives: i) polymers in cathodes, ii) polymer electrolytes, iii) polymer interlayers, iv) polymer separators, and v) polymers for the lithium metal anode protection. The aim is to present a detailed review of the critical aspects related to the functional polymers that can be used as important resources for researchers working in a diverse range of fields dealing with Li-S batteries. Finally, conclusions and perspectives are presented.
DA - 2019/3//
PY - 2019/3//
DO - 10.1016/j.progpolymsci.2018.12.002
VL - 90
SP - 118-163
UR - https://doi.org/10.1016/j.progpolymsci.2018.12.002
KW - Polymers
KW - Lithium-sulfur batteries
KW - Cathodes
KW - Electrolytes
KW - Interlayers/separators
KW - Lithium metal
ER -
TY - JOUR
TI - Photodegradation of copolyester films: A mechanistic study
AU - Arangdad, Kiarash
AU - Detwiler, Andrew
AU - Cleven, Curtis D.
AU - Burk, Christopher
AU - Shamey, Renzo
AU - Pasquinelli, Melissa A.
AU - Freeman, Harold
AU - El-Shafei, Ahmed
T2 - Journal of Applied Polymer Science
AB - ABSTRACT The photodegradation of copolyesters based on 1,4‐cyclohexanedimethanol (CHDM), tetramethyl‐1,3‐cyclobutanediol, and terephthalic acid units was investigated using various analytical methods. Photodegradation products were characterized using Fourier transform infrared (FTIR), liquid chromatography–mass spectrometry (LC–MS), and X‐ray Photoelectron spectroscopy (XPS) analysis. The homolytic scission of C‐O bonds of ester groups through a Norrish Type I reaction was supported by time of flight secondary ion mass spectrometry and LC–MS results, while nuclear magnetic resonance analysis confirmed hydrogen abstraction from the tertiary carbon of CHDM units in the trans ( equatorial‐equatorial ) conformation. Chain scission through Norrish Type II reaction is also responsible for the formation of carboxylic acid end group. Fluorescence emission from irradiated glycol modified poly(ethylene terephthalate) films demonstrated the formation of mono‐ and dihydroxyterephthalate species. Furthermore, FTIR and XPS valence band analysis confirmed configurational changes, in the polymer chain due to photodegradation. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47148.
DA - 2019/3/10/
PY - 2019/3/10/
DO - 10.1002/APP.47148
VL - 136
IS - 10
SP - 47148
SN - 0021-8995
UR - http://dx.doi.org/10.1002/APP.47148
KW - conformation
KW - copolyesters
KW - chain scission
KW - diol
KW - Norrish Type I
KW - Norrish Type II
KW - photodegradation
ER -
TY - JOUR
TI - Composite solid electrolytes for all-solid-state lithium batteries
AU - Dirican, Mahmut
AU - Yan, Chaoyi
AU - Zhu, Pei
AU - Zhang, Xiangwu
T2 - Materials Science and Engineering: R: Reports
AB - Compared to currently used liquid-electrolyte lithium batteries, all-solid-state lithium batteries are safer and possess longer cycle life and have less requirements on packaging and state-of-charge monitoring circuits. Among various types of solid electrolytes, composite solid electrolytes, which are composed of active or passive inorganic fillers and polymer matrices, have been considered as promising electrolyte candidates for all-solid-state lithium batteries. Incorporation of inorganic fillers into the polymer matrices has been demonstrated as an effective method to achieve high ionic conductivity and excellent interfacial contact with the electrodes. In this review article, we first summarize the historical development of composite solid electrolytes. Contribution of both inert inorganic fillers and active Li-ion conductors to the ionic conductivity, electrochemical stability, and mechanical properties of the composite solid electrolytes are elaborated. Possible mechanisms of conductivity enhancement by inorganic fillers are broadly discussed. Examples of different composite solid electrolyte design concepts, such as inorganic nanoparticle/polymer, inorganic nanofiber/polymer, and other inorganic/polymer composite solid electrolytes, are introduced and their advantages and disadvantages are discussed. Inorganic filler/polymer composite solid electrolytes studied for use in various Li battery systems including Li-ion, Li-sulfur, and Li-metal batteries are evaluated. Promising designs of composite solid electrolytes and cathode materials used in all-solid-state Li batteries are also introduced. Finally, future perspectives on current requirements of composite solid electrolyte technologies are highlighted.
DA - 2019/4//
PY - 2019/4//
DO - 10.1016/j.mser.2018.10.004
VL - 136
SP - 27-46
UR - https://doi.org/10.1016/j.mser.2018.10.004
KW - All-solid-state lithium battery
KW - Composite solid electrolyte
KW - Inorganic filler
KW - Ionic conductivity
ER -
TY - JOUR
TI - Toward Fully Manufacturable, Fiber Assembly–Based Concurrent Multimodal and Multifunctional Sensors for e‐Textiles
AU - Kapoor, Ashish
AU - McKnight, Michael
AU - Chatterjee, Kony
AU - Agcayazi, Talha
AU - Kausche, Hannah
AU - Bozkurt, Alper
AU - Ghosh, Tushar K.
T2 - Advanced Materials Technologies
AB - Abstract Soft polymer‐based sensors as an integral part of textile structures have attracted considerable scientific and commercial interest recently because of their potential use in healthcare, security systems, and other areas. While electronic sensing functionalities can be incorporated into textiles at one or more of the hierarchical levels of molecules, fibers, yarns, or fabrics, arguably a more practical and inconspicuous means to introduce the desired electrical characteristics is at the fiber level, using processes that are compatible to textiles. Here, a prototype multimodal and multifunctional sensor array formed within a woven fabric structure using bicomponent fibers with ordered insulating and conducting segments is reported. The multifunctional characteristics of the sensors are successfully demonstrated by measuring tactile, tensile, and shear deformations, as well as wetness and biopotential. While the unobtrusive integration of sensing capabilities offers possibilities to preserve all desirable textile qualities, this scaled‐up fiber‐based approach demonstrates the potential for scalable and facile manufacturability of practical e‐textile products using low‐cost roll‐to‐roll processing of large‐area flexible sensor systems and can be remarkably effective in advancing the field of e‐textiles.
DA - 2019/1//
PY - 2019/1//
DO - 10.1002/admt.201800281
VL - 4
IS - 1
UR - https://doi.org/10.1002/admt.201800281
KW - bicomponent fibers
KW - e-textiles
KW - fiber-based sensors
KW - flexible electronics
KW - wearable sensors
ER -