Works (208)

Updated: April 22nd, 2024 07:45

2024 article

Charge Protection in Electret Air Filtration Nonwoven Materials

Lavoie, J., Rojas, O. J., Khan, S. A., & Shim, E. (2024, April 9). ADVANCED MATERIALS TECHNOLOGIES, Vol. 4.

By: J. Lavoie n, O. Rojas n, S. Khan n & E. Shim n

author keywords: air filtration; charge retention; electret filter; melt additive; nonwovens
Sources: Web Of Science, ORCID, NC State University Libraries
Added: April 15, 2024

2023 journal article

Interacting collagen and tannic acid Particles: Uncovering pH-dependent rheological and thermodynamic behaviors

Journal of Colloid and Interface Science, 650, 541–552.

By: P. Sarker n, P. Jani n, L. Hsiao n, O. Rojas n & S. Khan n

author keywords: Particle-polyelectrolyte interactions; Collagen; Tannic Acid; Biomaterials; Rheology; Isothermal titration calorimetry; Quartz Crystal Microbalance
TL;DR: The effect of pH on the interactions between collagen and TA particles is explored by adding TA particles at physiological pH to collagen at both acidic and neutral pH, and results show significant increase in elastic modulus with an increase in collagen concentration. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, Crossref, NC State University Libraries
Added: July 5, 2023

2022 journal article

Bioactive tri-component nanofibers from cellulose acetate/lignin// N-vanillidene-phenylthiazole copper-(II) complex for potential diaper dermatitis control

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 205, 703–718.

By: D. Elsherbiny*, A. Abdelgawad n, M. El-Naggar n, B. Hemdan*, S. Ghazanfari*, S. Jockenhoevel, O. Rojas n

author keywords: Cellulose acetate; Lignin; Electrospinning; Antibacterial; Diaper dermatitis
MeSH headings : Cellulose / analogs & derivatives; Copper; Dermatitis; Humans; Lignin / pharmacology; Nanofibers
TL;DR: The cytotoxicity, protein leakage, and biological results, together with the above studies, would advocate copper complex loaded CA/Lig fibers as a potential candidate for hygienic applications. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: April 25, 2022

2022 article

High-Axial-Aspect Tannic Acid Microparticles Facilitate Gelation and Injectability of Collagen-Based Hydrogels

Sarker, P., Nalband, D. M., Freytes, D. O., Rojas, O. J., & Khan, S. A. (2022, October 5). BIOMACROMOLECULES, Vol. 10.

By: P. Sarker n, D. Nalband n, D. Freytes n, O. Rojas n & S. Khan n

MeSH headings : Humans; Hydrogels / chemistry; Tannins; Collagen / chemistry; Elastic Modulus; Rheology
TL;DR: Hydrogels containing TA microparticles show high cell viability and comparative cellular activity relative to the collagen-only hydrogel, demonstrating a new, simple, and better-performance alternative to cell culturing and difficult implantation scenarios. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, ORCID, NC State University Libraries
Added: October 6, 2022

2022 article

Machine learning as a tool to engineer microstructures: Morphological prediction of tannin-based colloids using Bayesian surrogate models

Jin, S.-A., Kamarainen, T., Rinke, P., Rojas, O. J., & Todorovic, M. (2022, February 28). MRS BULLETIN.

TL;DR: This study eschew trial-and-error morphology exploration of OTA particles in favor of a data-driven approach, which demonstrates the use of data-efficient surrogate models for general materials engineering purposes and facilitate the development of next-generation OTA-based applications. (via Semantic Scholar)
Source: Web Of Science
Added: March 14, 2022

2021 journal article

Anion-Specific Water Interactions with Nanochitin: Donnan and Osmotic Pressure Effects as Revealed by Quartz Microgravimetry

LANGMUIR, 37(38), 11242–11250.

By: S. Jin n, S. Khan n, R. Spontak n & O. Rojas n

MeSH headings : Anions; Ions; Osmotic Pressure; Quartz; Water
TL;DR: It is concluded that larger anions promote deswelling such that water losses increase with increasing anion valence, which is critical to ongoing efforts designed to dry chitin nanomaterials and develop bio-based and sustainable materials. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: September 15, 2021

2021 journal article

Associative structures formed from cellulose nanofibrils and nanochitins are pH-responsive and exhibit tunable rheology

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 588, 232–241.

By: E. Facchine n, L. Bai*, O. Rojas n & S. Khan n

author keywords: Ionic complex; Nanocellulose; Nanochitin; Isothermal titration calorimetry; Rheology
MeSH headings : Cellulose; Hydrogen-Ion Concentration; Hydrophobic and Hydrophilic Interactions; Nanofibers; Rheology
TL;DR: Ionic complex formation was found to provide enhanced stability under broader pH conditions, while physical entanglement of cellulose nanofibers was a substantial thickening mechanism in all systems. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: December 18, 2020

2021 journal article

Cellulose nanofibers and the film-formation dilemma: Drying temperature and tunable optical, mechanical and wetting properties of nanocomposite films composed of waterborne sulfopolyesters

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 598, 369–378.

By: S. Jin*, E. Facchine, O. Rojas*, S. Khan* & R. Spontak*

author keywords: Nanocellulose; Cellulose nanofiber; Waterborne coating; Sulfopolyester; Sulfonated Polyester
TL;DR: Tensile tests reveal that films containing 10 wt% CNF display the greatest mechanical improvements, suggesting the existence of a previously unidentified Goldilocks composition window. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: April 25, 2021

2021 journal article

Cross-Linked and Surface-Modified Cellulose Acetate as a Cover Layer for Paper-Based Electrochromic Devices

ACS APPLIED POLYMER MATERIALS, 3(5), 2393–2401.

By: J. Kaschuk*, M. Borghei*, K. Solin*, A. Tripathi n, A. Khakalo*, F. Leite, A. Branco, M. Sousa, E. Frollini*, O. Rojas*

author keywords: cellulose acetate; cross-linking; hydrophobization; barrier properties; electrochromic displays
TL;DR: The results indicate excellent prospects for CA films in achieving environmental-friendly ECDs that can replace poly(ethylene terephthalate)-based counterparts. (via Semantic Scholar)
Source: Web Of Science
Added: June 10, 2021

2021 journal article

Hydrothermal and mechanically generated hemp hurd nanofibers for sustainable barrier coatings/films

INDUSTRIAL CROPS AND PRODUCTS, 168.

By: P. Tyagi n, J. Gutierrez n, V. Nathani n, L. Lucia n, O. Rojas*, M. Hubbe n, L. Pal n

author keywords: Hemp hurds; Lignin-containing cellulose nanofibers; Barrier coatings; Biodegradable films; Circular economy; Sustainability
Sources: Web Of Science, ORCID, NC State University Libraries
Added: May 10, 2021

2021 journal article

Interfacial Contributions in Nanodiamond-Reinforced Polymeric Fibers

JOURNAL OF PHYSICAL CHEMISTRY B, 125(36), 10312–10323.

By: P. Adhikari n, P. Jani n, L. Hsiao n, O. Rojas n & S. Khan n

MeSH headings : Glass; Nanodiamonds; Polymers; Polyvinyl Alcohol; Tensile Strength
TL;DR: The interfacial energy parameters that explain the reinforcement of polymers with nanodiamond (ND) and the development of mechanical strength of electrospun ND-reinforced composites open the possibility for tailoring the interfacial interactions in polymer-ND fiber composites to achieve maximum mechanical reinforcement. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: September 7, 2021

2021 journal article

Mesophase characteristics of cellulose nanocrystal films prepared from electrolyte suspensions

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 599, 207–218.

By: S. Jin n, E. Facchine n, S. Khan n, O. Rojas n & R. Spontak n

author keywords: Nanocellulose mesophase; Lyotropism; Twisted nematic; Cholesteric; Electrolyte
TL;DR: Interestingly, mesomorphic behavior and CNC alignment appear to be sensitive to cationic radius and charge valence, in which case the optical properties of CNC films can be adjusted for targeted sustainable applications. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: April 18, 2021

2021 journal article

Micro- and nanofibrillated cellulose from virgin and recycled fibers: A comparative study of its effects on the properties of hygiene tissue paper

Carbohydrate Polymers, 254, 117430.

By: F. Zambrano n, Y. Wang n, J. Zwilling n, R. Venditti n, H. Jameel n, O. Rojas*, R. Gonzalez n

author keywords: Tissue paper; Micro- and nanofibrillated cellulose (MNFC); Softness; Water absorbency; MNFC manufacturing cost
MeSH headings : Cellulose / chemistry; Cellulose / isolation & purification; Eucalyptus / chemistry; Humans; Hydrolysis; Hygiene; Materials Testing; Nanofibers / chemistry; Paper; Wettability; Wood / chemistry
TL;DR: The results show that MNFC acts as an effective strength enhancer at the expense of a reduced water absorbency and softness of tissue paper, revealing the possibility to minimize MNFC manufacturing costs based on fiber selection. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, ORCID, Crossref
Added: January 25, 2021

2021 journal article

Recent developments in colorimetric and optical indicators stimulated by volatile base nitrogen to monitor seafood freshness

FOOD PACKAGING AND SHELF LIFE, 28.

author keywords: Colorimetric sensor; Nano technology; Freshness; Seafood; Volatile base nitrogen
Source: Web Of Science
Added: July 12, 2021

2021 journal article

Understanding lignin micro- and nanoparticle nucleation and growth in aqueous suspensions by solvent fractionation

Green Chemistry, 23(2), 1001–1012.

By: J. Zwilling n, X. Jiang n, F. Zambrano n, R. Venditti n, H. Jameel n, O. Velev n, O. Rojas*, R. Gonzalez n

Sources: Web Of Science, NC State University Libraries, ORCID, Crossref
Added: March 15, 2021

2019 journal article

Expanding the upper limits of robustness of cellulose nanocrystal aerogels: outstanding mechanical performance and associated pore compression response of chiral-nematic architectures

JOURNAL OF MATERIALS CHEMISTRY A, 7(25), 15309–15319.

By: A. Tripathi n, B. Tardy*, S. Khan n, F. Liebner* & O. Rojas n

Sources: Web Of Science, NC State University Libraries
Added: July 15, 2019

2019 journal article

Impact of oxidative carbonization on structure development of loblolly pine-derived biochar investigated by nuclear magnetic resonance spectroscopy and X-ray photoelectron spectroscopy

DIAMOND AND RELATED MATERIALS, 96, 140–147.

By: J. Park n, S. Yoo n, K. Lim*, O. Rojas*, M. Hubbe n & S. Park n

author keywords: Oxidative carbonization; Fast pyrolysis; Non-protonated carbon structure; Pi-pi(star) transition; Endothermic reaction
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: July 22, 2019

2019 journal article

Use of a Branched Linker for Enhanced Biosensing Properties in IgG Detection from Mixed Chinese Hamster Ovary Cell Cultures

BIOCONJUGATE CHEMISTRY, 30(3), 815–825.

By: N. Islam n, P. Gurgel n, O. Rojas n & R. Carbonell n

MeSH headings : Adsorption; Amino Acid Sequence; Animals; Biosensing Techniques; CHO Cells; Complex Mixtures; Cricetinae; Cricetulus; Immunoglobulin G / analysis; Kinetics; Peptides / chemistry
TL;DR: The branched amines increased the overall sensitivity and selectivity for IgG adsorption from complex mixtures of Chinese hamster ovary supernatant (CHO) and regeneration studies were carried out. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: April 9, 2019

2018 journal article

Control of Micro- and Mesopores in Carbon Nanofibers and Hollow Carbon Nanofibers Derived from Cellulose Diacetate via Vapor Phase Infiltration of Diethyl Zinc

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6(11), 13844–13853.

By: W. Xie n, S. Khan n, O. Rojas n & G. Parsons n

author keywords: Vapor infiltration synthesis; Carbon nanofibers; Hollow carbon nanofibers; Diethyl zinc; ZnO Atomic layer deposition (ALD); Cellulose diacetate; Thermoplastics
Sources: Web Of Science, NC State University Libraries, ORCID
Added: December 3, 2018

2018 journal article

Effect of Anisotropy of Cellulose Nanocrystal Suspensions on Stratification, Domain Structure Formation, and Structural Colors

BIOMACROMOLECULES, 19(7), 2931–2943.

By: K. Klockars, B. Tardy, M. Borghei, A. Tripathi n, L. Greca & O. Rojas n

MeSH headings : Anisotropy; Cellulose / analogs & derivatives; Liquid Crystals / chemistry; Nanoparticles / chemistry
TL;DR: It is shown that high AVF and more extensive phase separation in CNC suspensions resulted in large, long-range ordered chiral nematic domains in dried films, more pronounced for the suspensions that were closer to equilibrium prior to drying. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Heterogeneous Acetylation of Plant Fibers into Micro- and Nanocelluloses for the Synthesis of Highly Stretchable, Tough, and Water-Resistant Co-continuous Filaments via Wet-Spinning

ACS APPLIED MATERIALS & INTERFACES, 10(51), 44776–44786.

By: A. Tripathi n, M. Ago*, S. Khan n & O. Rojas n

author keywords: heterogeneous acetylation; co-continuous assembly; cellulose acetate; micro-and nanocelluloses; and continuous spinning; wet strength; stretchable filaments
MeSH headings : Acetylation; Cellulose / chemistry; Elastic Modulus; Nanofibers / chemistry; Tensile Strength; Water / chemistry
TL;DR: Filaments display a remarkable stretchability and ultrahigh toughness, both surpassing the values of all reported nanocellulose-based filaments, and retain 90% of these properties after long-term immersion in water, solving the main challenge of the lack of wet strength that is otherwise observed for filaments synthesized from nano celluloses. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: January 21, 2019

2018 journal article

Protein-mediated interfacial adhesion in composites of cellulose nanofibrils and polylactide: Enhanced toughness towards material development

COMPOSITES SCIENCE AND TECHNOLOGY, 160, 145–151.

By: A. Khakalo*, I. Filpponen* & O. Rojas n

author keywords: Nanofibrillated cellulose; Polylactide; Composites; Proteins; Adhesion
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Solid-State Synthesis of Metal Nanoparticles Supported on Cellulose Nanocrystals and Their Catalytic Activity

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6(3), 3974–3983.

By: W. Eisa n, A. Abdelgawad n & O. Rojas n

author keywords: Solid-state reaction; Heterogeneous catalyst; Silver nanoparticles; Gold nanoparticles; Cellulose nanocrystals; Organic-inorganic hybrids
Source: Web Of Science
Added: August 6, 2018

2018 journal article

Synthesis of organic aerogels with tailorable morphology and strength by controlled solvent swelling following Hansen solubility

SCIENTIFIC REPORTS, 8.

By: A. Tripathi n, G. Parsons n, S. Khan n & O. Rojas*

TL;DR: A generalized approach to synthesize aerogels that allows remarkable control over its mechanical properties is introduced and is a novel and generic solution to achieving full control of aerogel development, which up to now has been an intractable challenge. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2018 journal article

Thermally Stable and Tough Coatings and Films Using Vinyl Silylated Lignin

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 6(2), 1988–1998.

By: S. Li, W. Xie*, M. Wilt n, J. Willoughby n & O. Rojas*

author keywords: Lignin; Reactive extrusion; Vinyl silylated lignin; Polyacrylonitrile; Copolymers; Films; Coatings
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Clean and high-throughput production of silver nanoparticles mediated by soy protein via solid state synthesis

JOURNAL OF CLEANER PRODUCTION, 144, 501–510.

author keywords: Soy protein; Silver nanoparticles; Solid state reactions
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Complexes of Magnetic Nanoparticles with Cellulose Nanocrystals as Regenerable, Highly Efficient, and Selective Platform for Protein Separation

BIOMACROMOLECULES, 18(3), 898–905.

By: J. Guo*, I. Filpponen*, L. Johansson*, P. Mohammadi*, M. Latikka*, M. Linder*, R. Ras*, O. Rojas n

MeSH headings : Catalysis; Cellulose / chemistry; Cyclic N-Oxides / chemistry; Magnetite Nanoparticles / chemistry; Muramidase / metabolism; Oxidation-Reduction / drug effects; Proteins / chemistry
TL;DR: An efficient approach to develop cellulose nanocrystal hybrids with magnetically responsive Fe3O4 nanoparticles that were synthesized using the (Fe3+/Fe2+) coprecipitation is presented, revealing the specificity and potential of the presented method. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Curdlan cryogels reinforced with cellulose nanofibrils for controlled release

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING, 5(6), 5754–5761.

By: M. El-Naggar n, A. Abdelgawad n, A. Tripathi n & O. Rojas n

author keywords: Cryogels; Curdlan; Cellulose nanofibrils; Diclofenac sodium; Drug delivery
TL;DR: The addition of CNF significantly improved the in-vitro release of a nonsteroidal anti-inflammatory drug (diclofenac sodium), which is a promising alternative to current non-biodegradable systems. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Effect of Lipoxygenase Oxidation on Surface Deposition of Unsaturated Fatty Acids

LANGMUIR, 33(18), 4559–4566.

By: A. Tayeb n, M. Hubbe n, Y. Zhang* & O. Rojas n

MeSH headings : Adsorption; Fatty Acids, Unsaturated; Hydrophobic and Hydrophilic Interactions; Lipoxygenase / metabolism; Oxidation-Reduction
TL;DR: The results highlighted the benefit of enzyme as a biobased treatment to reduce hydrophobic interactions, thus providing a viable solution to the control of lipid deposition from aqueous media. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Fabrication and characterization of bactericidal thiol-chitosan and chitosan iodoacetamide nanofibres

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 94, 96–105.

By: A. Abdelgawad n, M. El-Naggar n, S. Hudson n & O. Rojas n

author keywords: Chitosan; Electrospinning; Thiol-chitosan; Chitosan iodoacetamide; Biocides; Antibacterial efficiency
MeSH headings : Anti-Bacterial Agents / chemical synthesis; Anti-Bacterial Agents / pharmacology; Chitosan / chemistry; Electrochemical Techniques; Escherichia coli / drug effects; Iodoacetamide / chemistry; Microbial Sensitivity Tests; Nanofibers / chemistry; Nanofibers / ultrastructure; Polyvinyl Alcohol / chemistry; Sulfhydryl Compounds / chemical synthesis; Sulfhydryl Compounds / pharmacology; Tensile Strength
TL;DR: It was proved that the electrospun fibers containing TCs or CsIA display a superior antibacterial activity against negative bacteria E. Coli with a minimum inhibitory concentration (MIC) of 400μg/ml. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Filaments with Affinity Binding and Wet Strength Can Be Achieved by Spinning Bifunctional Cellulose Nanofibrils

BIOMACROMOLECULES, 18(6), 1803–1813.

By: M. Vuoriluoto*, H. Orelma*, M. Lundahl*, M. Borghei* & O. Rojas n

MeSH headings : Antibodies / chemistry; Antibodies, Immobilized; Benzophenones / chemistry; Cellulose / chemistry; Electrochemical Techniques; Fluorescein-5-isothiocyanate; Fluorescent Dyes; Hemoglobins / chemistry; Hemoglobins / isolation & purification; Humans; Hydrogels / chemistry; Nanofibers / chemistry; Nanofibers / ultrastructure; Photochemical Processes; Protein Binding; Solutions; Tensile Strength; Ultraviolet Rays; Wettability
TL;DR: The developed bifunctional filaments based on nanocellulose offer great promise in detection and affinity binding built upon 1D systems, which can be engineered into other structures for rational use of material and space. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Immunosensors for C-Reactive Protein Based on Ultrathin Films of Carboxylated Cellulose Nanofibrils

BIOMACROMOLECULES, 18(2), 526–534.

By: Y. Zhang* & O. Rojas n

MeSH headings : Biosensing Techniques / methods; C-Reactive Protein / analysis; C-Reactive Protein / immunology; Carboxylic Acids / chemistry; Cellulose / chemistry; Fibrinogen / analysis; Fibrinogen / immunology; Humans; Hydrogen-Ion Concentration; Immunoassay / instrumentation; Immunoassay / methods; Immunoglobulin G / analysis; Immunoglobulin G / immunology; Nanofibers / chemistry; Quartz; Serum Albumin / analysis; Serum Albumin / immunology; Surface Properties
TL;DR: The detection efficiency for CRP, specificity, and concentration range displayed by the carboxylated CNF-based immunosensors coupled with oriented and unoriented anti-CRP were determined and compared. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

In-Plane Compression and Biopolymer Permeation Enable Super-stretchable Fiber Webs for Thermoforming toward 3-D Structures

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 5(10), 9114–9125.

By: A. Khakalo*, J. Kouko*, I. Filpponen*, E. Retulainen* & O. Rojas n

author keywords: Toughness; Formability; Biopolymer spraying; In-plane compaction; Extensibility; Paper; Packaging materials; 3-D structures
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Lignin Films from Spruce, Eucalyptus, and Wheat Straw Studied with Electroacoustic and Optical Sensors: Effect of Composition and Electrostatic Screening on Enzyme Binding

BIOMACROMOLECULES, 18(4), 1322–1332.

By: A. Pereira n, I. Hoeger n, A. Ferrer n, J. Rencoret*, J. Rio*, K. Kruus*, J. Rahikainen*, M. Kellock*, A. Gutierrez*, O. Rojas n

MeSH headings : Adsorption; Cellulose 1,4-beta-Cellobiosidase / chemistry; Eucalyptus / chemistry; Hydrogen Bonding; Hydrophobic and Hydrophilic Interactions; Lignin / chemistry; Lignin / isolation & purification; Microscopy, Atomic Force; Picea / chemistry; Plant Stems / chemistry; Protein Binding; Quartz Crystal Microbalance Techniques; Static Electricity; Surface Plasmon Resonance; Surface Properties; Trichoderma / enzymology; Triticum / chemistry; Wood / chemistry
TL;DR: A strong correlation between enzyme binding and the syringyl/guaiacyl (S/G) ratio was found for the lignins, which presented a similar hydroxyl group content (31P NMR), which furthers the understanding of lignin-cellulase interactions relevant to biomass that has been subjected to no or little pretreatment. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Lipoxygenase-mediated peroxidation of model plant extractives

INDUSTRIAL CROPS AND PRODUCTS, 104, 253–262.

By: A. Tayeb n, H. Sadeghifar n, M. Hubbe n & O. Rojas n

author keywords: Hydroperoxides; Lipoxygenase; Unsaturated fatty acids; Lipid oxidation; Fiber processing
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2017 review

Nanocellulose in thin films, coatings, and plies for packaging applications: a review

[Review of ]. BioResources, 12(1), 2143–2233.

By: M. Hubbe, A. Ferrer, P. Tyagi, Y. Yin, C. Salas, L. Pal, O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2017 review

Nanocellulose-surfactant interactions

[Review of ]. Current Opinion in Colloid & Interface Science, 29, 57–67.

By: B. Tardy*, S. Yokota*, M. Ago*, W. Xiang*, T. Kondo*, R. Bordes*, O. Rojas n

Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

Photoluminescent Hybrids of Cellulose Nanocrystals and Carbon Quantum Dots as Cytocompatible Probes for in Vitro Bioimaging

BIOMACROMOLECULES, 18(7), 2045–2055.

By: J. Guo*, D. Liu*, I. Filpponen*, L. Johanson, J. Malho*, S. Quraishi*, F. Liebner*, H. Santos*, O. Rojas n

MeSH headings : Animals; Cellulose / chemistry; Cellulose / pharmacology; Fluorescent Dyes / chemistry; Fluorescent Dyes / pharmacology; HeLa Cells; Humans; Materials Testing; Mice; Microscopy, Fluorescence / methods; Nanoparticles / chemistry; Quantum Dots / chemistry; RAW 264.7 Cells
TL;DR: Cell viability tests suggest the surface conjugation with NH2-CQDs not only improved the cytocompatibility of TO-CNCs, but also enhanced their cellular association and internalization on both HeLa and RAW 264.7 cells after 4 and 24 h incubation. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Protein Adsorption Tailors the Surface Energies and Compatibility between Polylactide and Cellulose Nanofibrils

BIOMACROMOLECULES, 18(4), 1426–1433.

By: A. Khakalo*, I. Filpponen* & O. Rojas n

MeSH headings : Adsorption; Caseins / chemistry; Cellulose / chemistry; Gelatin / chemistry; Hydrophobic and Hydrophilic Interactions; Nanofibers / chemistry; Polyesters / chemistry; Protein Hydrolysates / chemistry; Soybean Proteins / chemistry; Surface Properties; Thermodynamics
TL;DR: A robust method to screen denatured proteins and to tailor the wettability and material compatibility in the synthesis of bionanocomposites based on CNF and PLA is offered. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2017 journal article

Self-association and aggregation of kraft lignins via electrolyte and nonionic surfactant regulation: stabilization of lignin particles and effects on filtration

Nordic Pulp & Paper Research Journal, 32(4), 572–585.

By: C. Fritz, C. Salas, H. Jameel & O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2017 journal article

Soy Proteins As a Sustainable Solution to Strengthen Recycled Paper and Reduce Deposition of Hydrophobic Contaminants in Papermaking: A Bench and Pilot-Plant Study

ACS Sustainable Chemistry & Engineering, 5(8), 7211–7219.

By: A. Tayeb n, M. Hubbe n, P. Tayeb n, L. Pal n & O. Rojas n

author keywords: Soy protein; Lipoxygenases; Deposits; Detackification; Dry strength; Papermaking; Fiber internal bonding
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2016 journal article

Affinity interactions of human immunoglobulin G with short peptides: role of ligand spacer on binding, kinetics, and mass transfer

ANALYTICAL AND BIOANALYTICAL CHEMISTRY, 408(7), 1829–1841.

By: F. Shen n, O. Rojas n, J. Genzer n, P. Gurgel n & R. Carbonell n

author keywords: Peptide ligands; Immunoglobulin G; Peptide HWRGWV; Spacer arms; Quartz crystal microbalance
MeSH headings : Adsorption; Amino Acid Sequence; Humans; Immunoglobulin G / metabolism; Kinetics; Ligands; Peptides / chemistry; Peptides / metabolism; Polyethylene Glycols / chemistry; Protein Binding; Quartz Crystal Microbalance Techniques / methods; Silicon Dioxide / chemistry
TL;DR: Light was shed on interfacial effects important for detection and bioseparation by following the shifts in frequency and energy dissipation in a quartz crystal microbalance, as well as thermodynamic and kinetics parameters. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2016 journal article

Antibacterial activity of silver nanoparticles synthesized In-situ by solution spraying onto cellulose

CARBOHYDRATE POLYMERS, 147, 500–508.

author keywords: Microfibrills cellulose; Nanofibrills cellulose; Silver nanoparticles; In situ synthesis; Antibacterial activity
MeSH headings : Anti-Bacterial Agents / pharmacology; Cellulose / chemistry; Escherichia coli / drug effects; Metal Nanoparticles / chemistry; Metal Nanoparticles / ultrastructure; Silver / pharmacology; Spectroscopy, Fourier Transform Infrared
TL;DR: The present research demonstrates facile and fast method for in-situ antibacterial AgNPs loading on cellulose substrates and indicates that the particle size was found to be 11 and 26nm for AgnPs nucleated on NFC and MFC-based papers respectively. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Antioxidant and Thermal Stabilization of Polypropylene by Addition of Butylated Lignin at Low Loadings

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 4(10), 5248–5257.

By: D. Ye*, S. Li n, X. Lu n, . Zhang* & O. Rojas n

author keywords: Antioxidant; Lignin; Polypropylene; Butylation; Compatibility; Thermal stability; Oxidation induction time; PP aging
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Attachment of gold nanoparticles on cellulose nanofibrils via click reactions and electrostatic interactions

CELLULOSE, 23(5), 3065–3075.

By: J. Guo*, I. Filpponen*, P. Su*, J. Laine* & O. Rojas n

author keywords: Cellulose nanofibrils; Cationization; Gold nanoparticles; Click reactions; Bio-hybrid materials
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Biogenic SiO2 in colloidal dispersions via ball milling and ultrasonication

POWDER TECHNOLOGY, 301, 58–64.

By: B. Mattos*, O. Rojas n & W. Magalhaes*

author keywords: Biogenic nanosilica; Surface charge; Colloidal dispersions; Equisetum arvense
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Carboxymethylated lignins with low surface tension toward low viscosity and highly stable emulsions of crude bitumen and refined oils

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 482, 27–38.

By: S. Li n, D. Ogunkoya n, T. Fang n, J. Willoughby n & O. Rojas n

Contributors: S. Li n, D. Ogunkoya n, T. Fang n, J. Willoughby n & O. Rojas n

author keywords: Lignin; Bitumen-in-water emulsion; Colloidal stability; Fuel emulsions; High heating value; Exhaust emission; Combustion efficiency
MeSH headings : Canada; Cryoelectron Microscopy; Emulsions; Hydrocarbons / chemistry; Lignin / chemistry; Microscopy, Electron, Transmission; Molecular Weight; Oil and Gas Fields; Surface Tension; Viscosity; Water / chemistry
TL;DR: The ability of CML to stabilize emulsions and to contribute in their combustion was tested with light fuels after formulation of high internal phase systems (70% oil) that enabled operation of a fuel engine and highlighted the possibilities in high volume application for lignin biomacromolecules. (via Semantic Scholar)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2016 journal article

Curdlan in fibers as carriers of tetracycline hydrochloride: Controlled release and antibacterial activity

CARBOHYDRATE POLYMERS, 154, 194–203.

By: M. El-Naggar n, A. Abdelgawad n, C. Salas n & O. Rojas n

author keywords: Curdlan; Tetracycline hydrochloride; Antibacterial; Drug delivery; Nanofibers; Electrospinning
MeSH headings : Anti-Infective Agents / chemistry; Anti-Infective Agents / pharmacokinetics; Anti-Infective Agents / pharmacology; Calorimetry, Differential Scanning; Cross-Linking Reagents / chemistry; Delayed-Action Preparations; Drug Carriers / chemistry; Escherichia coli / drug effects; Escherichia coli / growth & development; Glutaral / chemistry; Microscopy, Electron, Scanning; Nanofibers / chemistry; Polyethylene Glycols / chemistry; Rheology; Solubility; Spectrophotometry, Ultraviolet; Spectroscopy, Fourier Transform Infrared; Surface Properties; Tetracycline / chemistry; Tetracycline / pharmacokinetics; Tetracycline / pharmacology; beta-Glucans / chemistry; beta-Glucans / pharmacokinetics
TL;DR: In-vitro activity measurements indicated a sustained and controlled TCH time-release pattern and excellent antibacterial activity against E. coli, as assessed by UV-vis spectroscopy and viable cell counting. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Double emulsions for the compatibilization of hydrophilic nanocellulose with non-polar polymers and validation in the synthesis of composite fibers

SOFT MATTER, 12(10), 2721–2728.

By: C. Carrillo n, T. Nypeloe & O. Rojas n

MeSH headings : Cellulose / chemistry; Emulsions / chemistry; Hydrophobic and Hydrophilic Interactions; Nanofibers / chemistry; Nanofibers / ultrastructure; Osmolar Concentration; Polymers / chemistry; Polystyrenes / chemistry; Rheology; Surface-Active Agents / chemistry
TL;DR: Double emulsion systems are proposed as a novel, efficient and scalable platform for CNF co-processing with non-polar systems and they open up the possibility for the redispersion of CNFs after removal of the organic phase. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Interfacial Stabilization of Fiber-Laden Foams with Carboxymethylated Lignin toward Strong Nonwoven Networks

ACS APPLIED MATERIALS & INTERFACES, 8(30), 19827–19835.

By: S. Li n, W. Xiang*, M. Jarvinen*, T. Lappalainen*, K. Salminen* & O. Rojas n

author keywords: foam formingair/liquid interfaces; carboxymethylated lignin; foamability; lignin adsorption
TL;DR: CML-based foams were found to be suitable carriers of cellulosic fibers and have opened the possibility for integrating fully biobased systems in foam-forming, an emerging option to increase the effective solids content in the system without compromising the quality of formed nonwoven materials while achieving reductions in water and energy consumption. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Oil-in-Water Emulsions Stabilized by Carboxymethylated Lignins: Properties and Energy Prospects

CHEMSUSCHEM, 9(17), 2460–2469.

By: S. Li n, J. Willoughby n & O. Rojas n

author keywords: amphiphiles; biomass; calorimetry; colloids; hydrocarbons
MeSH headings : Emulsions; Hot Temperature; Lignin / chemistry; Methylation; Oils / chemistry; Rheology; Solubility; Surface Properties; Water / chemistry
TL;DR: Overall, this work proposes the stabilization of O/W fuel emulsions by lignin as an important avenue in the utilization of this abundant biomacromolecule. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Physical, thermal, chemical and rheological characterization of cellulosic microfibrils and microparticles produced from soybean hulls

INDUSTRIAL CROPS AND PRODUCTS, 84, 337–343.

By: A. Ferrer n, C. Salas n & O. Rojas n

author keywords: Soybean hulls; Micro and nanofibrillated cellulose; Cellulosic microparticles; Crystallinity; Thermal stability; Rheology
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Reinforcement of polypropylene with lignocellulose nanofibrils and compatibilization with biobased polymers

JOURNAL OF APPLIED POLYMER SCIENCE, 133(34).

By: A. Ferrer n, I. Hoeger n, X. Lu n & O. Rojas n

author keywords: cellulose and other wood products; composites; differential scanning calorimetry; extrusion; nanocellulose; thermogravimetric analysis
Source: Web Of Science
Added: August 6, 2018

2016 journal article

Starch-Based Biofoams Reinforced with Lignocellulose Nanofibrils from Residual Palm Empty Fruit Bunches: Water Sorption and Mechanical Strength

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 4(10), 5546–5552.

By: M. Ago n, A. Ferrer n & O. Rojas n

author keywords: Empty palm fruit bunch fibers; EFB; Cellulose nanofibrils; CNF; Lignocellulose; Aerogel; Water sorption; Foams; Hydrophobicity
Source: Web Of Science
Added: August 6, 2018

2016 journal article

UV-ozone patterning of micro-nano fibrillated cellulose (MNFC) with alkylsilane self-assembled monolayers

CELLULOSE, 23(3), 1847–1857.

By: T. Kamarainen*, L. Arcot*, L. Johansson*, J. Campbell*, T. Tammelin*, S. Franssila*, J. Laine*, O. Rojas n

author keywords: Nanocellulose (MNFC); Photolithography; Silane; Self-assembled monolayer (SAM); Protein patterning
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Bio-based Wrinkled Surfaces Harnessed from Biological Design Principles of Wood and Peroxidase Activity

CHEMSUSCHEM, 8(22), 3892–3896.

By: H. Izawa*, N. Okuda*, S. Ifuku*, M. Morimoto*, H. Saimoto* & O. Rojas n

author keywords: bio-based materials; biomimetic materials; green chemistry; horseradish peroxidase; surface wrinkling
MeSH headings : Biomimetics / methods; Caffeic Acids / chemistry; Coumaric Acids / chemistry; Horseradish Peroxidase / metabolism; Physical Phenomena; Surface Properties; Wood
TL;DR: It is demonstrated that the design of the wrinkled surfaces can be controlled by the molecular structure of the phenolic precursor, temperature, and drying stress. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Cellulose nanofibrils for one-step stabilization of multiple emulsions (W/O/W) based on soybean oil

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 445, 166–173.

By: C. Carrillo n, T. Nypeloe & O. Rojas n

author keywords: Cellulose nanofibrils; Emulsions; Soybean oil; Emulsion stability; Surfactants
MeSH headings : Cellulose / chemistry; Emulsions / chemistry; Nanofibers / chemistry; Nanofibers / ultrastructure; Phase Transition; Soybean Oil / chemistry; Surface-Active Agents / chemistry; Viscosity; Water / chemistry
TL;DR: Cellulose nanofibrils (CNF) are a feasible alternative to conventional polysaccharides as stability enhancers for normal and multiple emulsions that exhibit strong shear thinning behavior. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Comprehensive elucidation of the effect of residual lignin on the physical, barrier, mechanical and surface properties of nanocellulose films

GREEN CHEMISTRY, 17(3), 1853–1866.

By: E. Rojo*, M. Peresin*, W. Sampson*, I. Hoeger n, J. Vartiainen*, J. Laine*, O. Rojas n

Source: Web Of Science
Added: August 6, 2018

2015 review

Development of self-bonded fiberboards from fiber of leaf plantain: Effect of water and organic extractives removal

[Review of ]. BioResources, 10(1), 672–683.

By: C. Alvarez*, O. Rojas n, B. Rojano* & P. Ganan*

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Dewatering of MNFC containing microfibrils and microparticles from soybean hulls: mechanical and transport properties of hybrid films

CELLULOSE, 22(6), 3919–3928.

By: A. Ferrer n, C. Salas n & O. Rojas n

author keywords: Soybean hulls; Micro and nanofibrillar cellulose; Film; Water contact angle; Young modulus
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Dynamics of Cyclodimerization and Viscoelasticity of Photo-Crosslinkable PVA

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 53(5), 345–355.

By: H. Bai*, J. Xu*, Y. Zhang n, X. Liu* & O. Rojas n

author keywords: films; photo-crosslinking reaction; PVA-SbQ; QCM-D; viscoelastic properties; protein release
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Influence of operating variables and model to minimize the use of anthraquinone in the soda-anthraquinone pulping of barley straw

BioResources, 10(4), 6442–6456.

By: A. Ferrer, F. Vargas, H. Jameel* & O. Rojas*

UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2015 journal article

Interactions between Cellulolytic Enzymes with Native, Autohydrolysis, and Technical Lignins and the Effect of a Polysorbate Amphiphile in Reducing Nonproductive Binding

BIOMACROMOLECULES, 16(12), 3878–3888.

By: C. Fritz n, A. Ferrer n, C. Salas n, H. Jameel n & O. Rojas n

MeSH headings : Adsorption; Biomass; Cellulases / chemistry; Hydrogen-Ion Concentration; Hydrolysis; Hydrophobic and Hydrophilic Interactions; Lignin / chemistry; Polysorbates / chemistry; Protein Binding; Protein Conformation; Quartz Crystal Microbalance Techniques; Static Electricity; Surface Plasmon Resonance
TL;DR: The results highlight the benefit of nonionic surfactant pretreatment to reduce nonproductive enzyme binding while maintaining the reactivity of the cellulosic substrate. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Interpenetrated polymer networks in composites with poly(vinyl alcohol), micro- and nano-fibrillated cellulose (M/NFC) and polyHEMA to develop packaging materials

CELLULOSE, 22(6), 3877–3894.

author keywords: Poly(vinyl alcohol); Micro- and nanofibrillated cellulose; Photo-crosslinking; Composite films; Packaging
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Lignin supracolloids synthesized from (W/O) microemulsions: use in the interfacial stabilization of Pickering systems and organic carriers for silver metal

SOFT MATTER, 11(10), 2046–2054.

By: T. Nypeloe, C. Carrillo n & O. Rojas n

MeSH headings : Colloids / chemistry; Cross-Linking Reagents / chemistry; Emulsions; Epichlorohydrin / chemistry; Lignin / chemistry; Metal Nanoparticles / chemistry; Silver / chemistry; Water / chemistry
TL;DR: The use of related emulsions are introduced to enable in situ reduction of silver and loading of silver nanoparticles in lignin carriers and their properties were compared against those obtained by using traditional inorganic particles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Performance, combustion, and emissions in a diesel engine operated with fuel-in-water emulsions based on lignin

APPLIED ENERGY, 154, 851–861.

By: D. Ogunkoya n, S. Li n, O. Rojas n & T. Fang n

Contributors: D. Ogunkoya n, S. Li n, O. Rojas n & T. Fang n

author keywords: Fuel emulsions; Oil-in-water emulsion; Lignin; Stabilizer; Diesel engine combustion; Emissions
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2015 journal article

Role of textile substrate hydrophobicity on the adsorption of hydrosoluble nonionic block copolymers

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 454, 89–96.

By: J. Song n, C. Salas n & O. Rojas n

author keywords: Adsorption; Nonionic polymers; Pluronics; Polyalkylene glycols; Ethylene oxide and propylene oxide copolymers; Cellulose; Polypropylene; Nylon; Polyester; Hydrophobic forces
TL;DR: The adsorption of polyalkylene glycols and co-polymers of ethylene oxide and propylene oxide on substrates relevant to textiles with varying surface energies was studied by using quartz crystal microgravimetry. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Single-Molecule Resolution of Protein Dynamics on Polymeric Membrane Surfaces: The Roles of Spatial and Population Heterogeneity

ACS APPLIED MATERIALS & INTERFACES, 7(6), 3607–3617.

By: B. Langdon*, R. Mirhossaini*, J. Mabry*, I. Sriram*, A. Lajmi*, Y. Zhang n, O. Rojas n, D. Schwartz*

author keywords: protein adsorption; ultrafiltration; membrane fouling; single-molecule; total internal reflection fluorescence microscopy (TIRFM)
MeSH headings : Adsorption; Animals; Cattle; Humans; Immunoglobulin G / chemistry; Membranes, Artificial; Polymers / chemical synthesis; Polymers / chemistry; Serum Albumin, Bovine / chemistry; Surface Properties
TL;DR: It is proposed that strong surface sites may nucleate protein aggregation, initiated preferentially by protein oligomers, and accelerate ultrafiltration membrane fouling, and demonstrates that strong binding sites can be modified by changing solution conditions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2015 journal article

Study on charge distribution of carboxymethylated cotton fabric by streaming potential/current measurements

AATCC Journal of Research, 2(2), 13–19.

By: Z. Wang, P. Hauser* & O. Rojas*

Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

A Facile and Green Method to Hydrophobize Films of Cellulose Nanofibrils and Silica by Laccase-Mediated Coupling of Nonpolar Colloidal Particles

CHEMSUSCHEM, 7(10), 2868–2878.

By: O. Cusola*, M. Blanca Roncero*, T. Vidal* & O. Rojas n

author keywords: adsorption; biocatalysis; hydrophobization; enzymes; nanoparticles
MeSH headings : Cellulose / chemistry; Colloids / chemistry; Gallic Acid / chemistry; Green Chemistry Technology; Hydrophobic and Hydrophilic Interactions; Laccase / chemistry; Microscopy, Atomic Force; Nanofibers / chemistry; Nanofibers / ultrastructure; Nephelometry and Turbidimetry; Particle Size
TL;DR: This method represents a sustainable alternative to traditional approaches for cellulose hydrophobization and a step forward in implementing green routes for surface modification. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

A method for the heterogeneous modification of nanofibrillar cellulose in aqueous media

CARBOHYDRATE POLYMERS, 100, 107–115.

By: K. Junka*, I. Filpponen*, L. Johansson*, E. Kontturi*, O. Rojas n & J. Laine*

author keywords: Click chemistry; Surface functionalization; Nanofibrillar cellulose; Carboxymethyl cellulose; Adsorption; Functional materials
MeSH headings : Adsorption; Animals; Azides / chemistry; Carboxymethylcellulose Sodium / chemistry; Cattle; Cellulose / chemistry; Click Chemistry; Nanofibers / chemistry; Serum Albumin, Bovine / chemistry; Surface Properties; Water / chemistry
TL;DR: "click" chemistry, copper (I)-catalyzed azide-alkyne cycloaddition reaction (CuAAC), was carried out for covalent attachment of different molecules on the pre-functionalized ultrathin cellulose films and was successfully used in modification of nanofibrillar cellulose (NFC) in aqueous media. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Acid-Generated Soy Protein Hydrolysates and Their Interfacial Behavior on Model Surfaces

BIOMACROMOLECULES, 15(11), 4336–4342.

By: J. Arboleda n, O. Rojas n & L. Lucia n

MeSH headings : Hydrochloric Acid / chemistry; Hydrochloric Acid / metabolism; Hydrolysis; Hydrophobic and Hydrophilic Interactions; Protein Hydrolysates / chemistry; Protein Hydrolysates / metabolism; Soybean Proteins / chemistry; Soybean Proteins / metabolism
TL;DR: It was found that during adsorption the hydrolysates tended to form less surface aggregates and adsorbed at faster rates compared with unmodified SP, and the benefits derived from the application of SP hydrolysate are highlighted. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2014 journal article

Adsorption of polyalkyl glycol ethers and triblock nonionic polymers on PET

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 420, 174–181.

By: J. Song*, W. Krause* & O. Rojas*

author keywords: Polyester; Nonionic polymeric surfactants; Polyalkyl glycol ethers; Triblock nonionic polymers; Adsorption; Self-assembly; Hydrophobic forces; Polyester; PET
TL;DR: This work used quartz crystal microgravimetry (QCM) to investigate the adsorption on poly(ethylene terephthalate) (PET) of polyalkyl glycol ethers and triblock molecules of ethylene oxide and propylene oxide to show strongly correlated with the self-association driven by the chain length of the respective hydrophobic blocks. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Affibody conjugation onto bacterial cellulose tubes and bioseparation of human serum albumin

RSC Advances, 4(93), 51440–51450.

By: H. Orelma*, L. Morales*, L. Johansson*, I. Hoeger n, I. Filpponen*, C. Castro*, O. Rojas n, J. Laine*

TL;DR: Proof of protein binding via anti-HSA affibody conjugated on tubules of CMC- and TEMPO-oxidized BC was obtained by fluorescence imaging, and specific binding of tagged HSA resulted in a linear increase of fluorescence intensity as a function of tagging HSA concentration in the contacting solution. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018

2014 journal article

Antimicrobial wound dressing nanofiber mats from multicomponent (chitosan/silver-NPs/polyvinyl alcohol) systems

CARBOHYDRATE POLYMERS, 100, 166–178.

By: A. Abdelgawad n, S. Hudson n & O. Rojas n

author keywords: Silver nanoparticles; Chitosan; Electrospinning; Antimicrobial; Polyvinyl alcohol
MeSH headings : Anti-Infective Agents / chemistry; Anti-Infective Agents / pharmacology; Bandages / microbiology; Chitosan / chemistry; Drug Carriers / chemistry; Escherichia coli / drug effects; Glucose / chemistry; Green Chemistry Technology; Metal Nanoparticles / chemistry; Nanofibers / chemistry; Polyvinyl Alcohol / chemistry; Reducing Agents / chemistry; Silver / chemistry; Silver Nitrate / chemistry; Temperature; Wounds and Injuries
TL;DR: The results showed superior properties and synergistic antibacterial effects by combining chitosan with Ag-NPs, which are superior to conventional nanofiber mats loaded with silver nanoparticles. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Asymmetric cellulose nanocrystals: thiolation of reducing end groups via NHS-EDC coupling

CELLULOSE, 21(6), 4209–4218.

By: L. Arcot*, M. Lundahl*, O. Rojas* & J. Laine*

author keywords: Cellulose nanocrystals; Reducing end; Thiolation; Chemisorption
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Cellulose Nanocrystal-Mediated Synthesis of Silver Nanoparticles: Role of Sulfate Groups in Nucleation Phenomena

BIOMACROMOLECULES, 15(1), 373–379.

By: A. Lokanathan*, K. Uddin*, O. Rojas n & J. Laine*

MeSH headings : Cellulose / chemical synthesis; Crystallization; Metal Nanoparticles / chemistry; Silver / chemistry; Sulfates / chemical synthesis
TL;DR: CNC is used to mediate silver nanoparticle synthesis and elucidate the effect of CNC surface chemistry in nanoparticle formation and nucleation in the presence of borohydride reduction. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Crosslinked PVA nanofibers reinforced with cellulose nanocrystals: Water interactions and thermomechanical properties

Journal of Applied Polymer Science, 131(11), n/a-n/a.

By: M. Peresin n, A. Vesterinen*, Y. Habibi n, L. Johansson*, J. Pawlak n, A. Nevzorov n, O. Rojas n

author keywords: cellulose and other wood products; composites; electrospinning; hydrophilic polymers; nanoparticles; nanowires and nanocrystals
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2014 journal article

Dynamic and equilibrium performance of sensors based on short peptide ligands for affinity adsorption of human IgG using surface plasmon resonance

BIOSENSORS & BIOELECTRONICS, 58, 380–387.

By: N. Islam n, F. Shen n, P. Gurgel n, O. Rojas n & R. Carbonell n

author keywords: Hexamer; Protein A; Human immunoglobulin G; Self-assembled monolayers; Adsorption rate constant; Desorption rate constant
MeSH headings : Adsorption; Antibody Affinity / immunology; Binding Sites; Biosensing Techniques / instrumentation; Equipment Design; Equipment Failure Analysis; Immunoglobulin G / chemistry; Immunoglobulin G / immunology; Peptides / chemistry; Peptides / immunology; Protein Binding; Protein Interaction Mapping / instrumentation; Surface Plasmon Resonance / instrumentation
TL;DR: This paper characterizes the potential of novel hexameric peptide ligands for on-line IgG detection in bioprocesses and finds that the peptide-IgG binding was reaction controlled, however the protein A-IGG binding mechanism was partially mass transfer (diffusion) controlled. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Effects of Composition of Oligo(ethylene glycol)-Based Mixed Monolayers on Peptide Grafting and Human Immunoglobulin Detection

JOURNAL OF PHYSICAL CHEMISTRY C, 118(10), 5361–5373.

By: N. Islam n, P. Gurgel n, O. Rojas n & R. Carbonell n

TL;DR: The specificity toward IgG was optimal for peptides grafted on SAMs prepared from 10% EG6NH2 precursor solution, even though this surface did not have the highest number of peptides per unit area. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Effects of residual lignin and heteropolysaccharides on the bioconversion of softwood lignocellulose nanofibrils obtained by SO2-ethanol-water fractionation

BIORESOURCE TECHNOLOGY, 161, 55–62.

By: L. Morales*, M. Iakovlev*, R. Martin-Sampedro*, J. Rahikainen*, J. Laine*, A. Heiningen*, O. Rojas n

author keywords: Lignocellulose nanofibrils (LCNF); SO2-ethanol-water (SEW); Bioconversion; Residual lignin; Hemicelluloses
MeSH headings : Chemical Fractionation; Ethanol; Hydrolysis; Lignin / chemistry; Nanofibers / chemistry; Picea; Polysaccharides / chemistry; Sulfur Dioxide
TL;DR: Sugar yields for LCNF were higher than those for precursor SEW fibers, highlighting the benefits of high surface area in LCNF, and near complete LCNF hydrolysis was achieved, even at high lignin and hemicellulose content. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

In situ production of nanocomposites of poly(vinyl alcohol) and cellulose nanofibrils from Gluconacetobacter bacteria: effect of chemical crosslinking

CELLULOSE, 21(3), 1745–1756.

By: C. Castro*, A. Vesterinen*, R. Zuluaga*, G. Caro*, I. Filpponen*, O. Rojas*, G. Kortaberria*, P. Ganan*

author keywords: Nano composites; Poly(vinyl alcohol); Bacterial cellulose; Gluconacetobacter medellinensis; Thermal stability; Mechanical properties
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Magneto-responsive hybrid materials based on cellulose nanocrystals

CELLULOSE, 21(4), 2557–2566.

By: T. Nypeloe, C. Rodriguez-Abreu*, J. Rivas*, M. Dickey n & O. Rojas n

author keywords: Cellulose nanocrystals; Magneto-responsive materials; Cobalt iron oxide particles; Self-standing film; CNC hybrids; Responsive dispersion
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2014 journal article

Microbeads and Hollow Microcapsules Obtained by Self-Assembly of Pickering Magneto-Responsive Cellulose Nanocrystals

ACS APPLIED MATERIALS & INTERFACES, 6(19), 16851–16858.

By: T. Nypeloe, C. Rodriguez-Abreu*, Y. Kolen'ko*, J. Rivas* & O. Rojas*

author keywords: cellulose nanocrystals; microcapsules; magnetic microbeads; Pickering emulsions; scavengers
TL;DR: The CNC-based, magneto-responsive solid microbeads and hollow microcapsules were characterized by electron microscopy (morphology), X-ray diffraction (phase composition), and magnetometry (magnetic properties) and enables easy separation of substances immobilized on the beads. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Microemulsion Systems for Fiber Deconstruction into Cellulose Nanofibrils

ACS APPLIED MATERIALS & INTERFACES, 6(24), 22622–22627.

By: C. Carrillo n, J. Laine* & O. Rojas n

author keywords: deconstruction; microfluidization; cellulose nanofibrils; microemulsions; pretreatment; energy consumption
MeSH headings : Crystallization / methods; Emulsifying Agents; Emulsions / chemistry; Ethylenediamines / chemistry; Fibrillar Collagens / chemical synthesis; Fibrillar Collagens / ultrastructure; Materials Testing; Nanofibers / chemistry; Nanofibers / ultrastructure; Particle Size; Urea / chemistry; Water / chemistry
TL;DR: Overall, fiber deconstruction after microemulsion treatment is a step toward energy-efficient production of nanocellulose, and urea-containing microemulsions were found to be most effective in reducing energy consumption and in weakening the cellulosic matrix. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Modification of Cellulose Nanofibrils with Luminescent Carbon Dots

BIOMACROMOLECULES, 15(3), 876–881.

By: K. Junka*, J. Guo*, I. Filpponen*, J. Laine* & O. Rojas n

MeSH headings : Adsorption; Carbon / chemistry; Cellulose / chemistry; Crystallization; Luminescence; Luminescent Agents / chemistry; Nanofibers / chemistry; Nanoparticles / chemistry; Quartz / chemistry; Surface Plasmon Resonance; Surface Properties; Water / chemistry
TL;DR: As the first reported use of CD in nanocellulose products, this work provides proof-of-concept for the synthesis of transparent and fluorescent nanopaper and for its tunable luminescence as confirmed by confocal microscopy imaging. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Molecular Dynamics Simulations of the Adhesion of a Thin Annealed Film of Oleic Acid onto Crystalline Cellulose

BIOMACROMOLECULES, 15(4), 1476–1483.

By: M. Quddus, O. Rojas* & M. Pasquinelli*

Contributors: M. Quddus, O. Rojas* & M. Pasquinelli*

MeSH headings : Biocompatible Materials / chemistry; Cellulose / chemistry; Crystallization; Hydrogen Bonding; Hydrophobic and Hydrophilic Interactions; Molecular Dynamics Simulation; Oleic Acid / chemistry
TL;DR: Oleophilicity of the cellulose planes increased with the increase in surface roughness and number of directional hydrogen bonds, and results correlate with conclusions drawn from experimental studies such as adhesion of an ink vehicle on cellulose surface. (via Semantic Scholar)
Sources: Web Of Science, ORCID
Added: August 6, 2018

2014 journal article

Mountain Pine Beetle-Killed Lodgepole Pine for the Production of Submicron Lignocellulose Fibrils

FOREST SCIENCE, 60(3), 502–511.

By: I. Hoeger n, R. Gleisner*, J. Negron*, O. Rojas n & J. Zhu

author keywords: cell wall deconstruction; cellulose nanofibrils; lignocellulose fibrils; mechanical fibrillation; mountain pine bark beetle
TL;DR: It can be concluded that MPB-killed lodgepole pine is a suitable feedstock for the production of lignocellulose micro-/nanofibrils from the widely available resource represented by dead pines after an outbreak. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 review

Nanocellulose properties and applications in colloids and interfaces

[Review of ]. CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 19(5), 383–396.

By: C. Salas n, T. Nypeloe, C. Rodriguez-Abreu*, C. Carrillo n & O. Rojas n

author keywords: Nanocellulose; Cellulose nanofibrils; Cellulose nanouystals; Nanoparticles; Self-assembly; Anisotropic particles
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Soy Protein-Based Polyelectrolyte Complexes as Biobased Wood Fiber Dry Strength Agents

ACS SUSTAINABLE CHEMISTRY & ENGINEERING, 2(10), 2267–2274.

By: J. Arboleda n, N. Niemi n, J. Kumpunen n, L. Lucia n & O. Rojas n

author keywords: Soy protein; Ionic complexes; Dry strength; Wood fibers; Papermaking; Mechanical properties; Polyelectrolyte complexes
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2014 journal article

Synthesis of Thermoplastic Starch-Bacterial Cellulose Nanocomposites via in situ Fermentation

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY, 25(9), 1607–1613.

By: M. Osorio, D. Restrepo, J. Velasquez-Cock, R. Zuluaga*, U. Montoya*, O. Rojas n, P. Ganan, D. Marin*, C. Castro*

author keywords: nanocomposite; thermoplastic starch; bacterial cellulose; in situ fermentation; chemical crosslinking
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Synthesis of soy protein-lignin nanofibers by solution electrospinning

REACTIVE & FUNCTIONAL POLYMERS, 85, 221–227.

By: C. Salas n, M. Ago*, L. Lucia n & O. Rojas n

author keywords: Soy protein; Composite fibers; Lignin; Electrospinning
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2014 journal article

Using gelatin protein to facilitate paper thermoformability

REACTIVE & FUNCTIONAL POLYMERS, 85, 175–184.

By: A. Khakalo*, I. Filpponen*, L. Johansson*, A. Vishtal*, A. Lokanathan*, O. Rojas n, J. Laine*

author keywords: Cellulose modification; Gelatin; Paper formability; Paper extensibility; Packaging
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Activated carbon from biochar: Influence of its physicochemical properties on the sorption characteristics of phenanthrene

BIORESOURCE TECHNOLOGY, 149, 383–389.

By: J. Park n, I. Hung*, Z. Gan*, O. Rojas n, K. Lim* & S. Park n

author keywords: Biochar; Solid-state NMR; Activation Activated biochar; Phenanthrene adsorption
TL;DR: The relationship between physicochemical properties of biochar-based activated carbons and its adsorption was investigated using an aromatic model compound, phenanthrene, and solid-state (13)C NMR analysis indicated more condensed aromatic structures when pyrolysis temperature increased or after activation process induced. (via Semantic Scholar)
UN Sustainable Development Goal Categories
2. Zero Hunger (Web of Science)
6. Clean Water and Sanitation (OpenAlex)
13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

Bioactive Cellulose Nanofibrils for Specific Human IgG Binding

BIOMACROMOLECULES, 14(12), 4161–4168.

By: Y. Zhang*, R. Carbonell* & O. Rojas*

MeSH headings : Adsorption; Biosensing Techniques; Cellulose / chemistry; Cellulose / ultrastructure; Chromatography, Affinity; Humans; Immobilized Proteins; Immunoglobulin G / chemistry; Immunoglobulin G / isolation & purification; Kinetics; Microscopy, Atomic Force; Nanofibers / chemistry; Nanofibers / ultrastructure; Peptide Fragments / chemistry; Polymerization; Polymethacrylic Acids / chemistry; Protein Binding; Quartz Crystal Microbalance Techniques; Signal-To-Noise Ratio; Surface Properties
TL;DR: The effects of initiator concentration and thickness of poly(AMA-co-HEMA) layer on hIgG adsorption were investigated in the developed systems, which exhibited high signal-to-noise response. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 review

Cellulosic substrates for removal of pollutants from aqueous systems: A review. 3. spilled oil and emulsified organic liquids

[Review of ]. BioResources, 8(2), 3038–1179.

By: M. Hubbe n, O. Rojas n, M. Fingas & B. Gupta n

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Cilia-Mimetic Hairy Surfaces Based on End-Immobilized Nanocellulose Colloidal Rods

BIOMACROMOLECULES, 14(8), 2807–2813.

By: A. Lokanathan*, A. Nykanen, J. Seitsonen, L. Johansson*, J. Campbell*, O. Rojas n, O. Ikkala, J. Laine*

MeSH headings : Adsorption; Biomimetic Materials / chemistry; Cellulose / chemistry; Cilia; Colloids; Gold / chemistry; Microscopy, Atomic Force; Nanoparticles / chemistry; Nanoparticles / ultrastructure; Nanotubes / chemistry; Nanotubes / ultrastructure; Quartz Crystal Microbalance Techniques; Surface Properties
TL;DR: A general platform for nanosized artificial cilia for fluid manipulation and controlled adsorption/desorption is foreseeed, as the CNCs are piezoelectric and allow magnetic functionalization by nanoparticles. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Evaluation of O/W microemulsions to penetrate the capillary structure of woody biomass: interplay between composition and formulation in green processing

Green Chemistry, 15(12), 3377.

By: C. Carrillo n, D. Saloni n & O. Rojas n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2013 journal article

Generation and Properties of Antibacterial Coatings Based on Electrostatic Attachment of Silver Nanoparticles to Protein-Coated Polypropylene Fibers

ACS APPLIED MATERIALS & INTERFACES, 5(11), 5298–5306.

By: K. Goli n, N. Gera n, X. Liu n, B. Rao n, O. Rojas n & J. Genzer n

author keywords: antibacterial; polypropylene; protein adsorption; nanoparticle; functional coating
MeSH headings : Anti-Bacterial Agents / chemistry; Coated Materials, Biocompatible / chemistry; Escherichia coli / drug effects; Escherichia coli Infections / prevention & control; Hydrophobic and Hydrophilic Interactions; Light; Metal Nanoparticles / chemistry; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Polypropylenes / chemistry; Proteins / chemistry; Silver / chemistry; Static Electricity; Ultraviolet Rays
TL;DR: The results show that PP surfaces coated with AgNPs exhibit excellent antibacterial activity with 100% removal efficiency and are tested against gram negative bacteria Escherichia coli. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

Inhibitory effect of lignin during cellulose bioconversion: The effect of lignin chemistry on non-productive enzyme adsorption

BIORESOURCE TECHNOLOGY, 133, 270–278.

By: J. Rahikainen*, R. Martin-Sampedro*, H. Heikkinen*, S. Rovio*, K. Marjamaa*, T. Tamminen*, O. Rojas n, K. Kruus*

author keywords: Lignin; Steam explosion pre-treatment; Cellulase binding; Trichoderma reesei Cel7A; Carbohydrate binding module
MeSH headings : Adsorption / drug effects; Biomass; Cellulase / metabolism; Cellulose / metabolism; Hydrolysis / drug effects; Hydroxyl Radical / metabolism; Lignin / chemistry; Lignin / isolation & purification; Lignin / pharmacology; Molecular Weight; Protein Binding / drug effects; Quartz Crystal Microbalance Techniques; Trichoderma / enzymology
TL;DR: The positive effect of SE pre-treatment, opening the cell wall matrix to make polysaccharides more accessible, may be compromised by the structural changes of lignin that increase non-productive enzyme adsorption. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Laccase-Mediated Coupling of Nonpolar Chains for the Hydrophobization of Lignocellulose

BIOMACROMOLECULES, 14(5), 1637–1644.

By: J. Garcia-Ubasart*, T. Vidal*, A. Torres* & O. Rojas n

MeSH headings : Flax / chemistry; Fungal Proteins / chemistry; Fungal Proteins / isolation & purification; Hot Temperature; Hydrophobic and Hydrophilic Interactions; Hydroxybenzoates / chemistry; Laccase / chemistry; Laccase / isolation & purification; Lignin / chemistry; Pycnoporus / chemistry; Pycnoporus / enzymology; Spectroscopy, Fourier Transform Infrared; Trametes / chemistry; Trametes / enzymology; Water
TL;DR: The results help to better understand the mechanisms involved in laccase-mediated hydrophobization and provide a proof of a biotechnological platform for the development of value-added fiber products. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Mechanical deconstruction of lignocellulose cell walls and their enzymatic saccharification

CELLULOSE, 20(2), 807–818.

By: I. Hoeger n, S. Nair*, A. Ragauskas*, Y. Deng*, O. Rojas n & J. Zhu*

author keywords: Cell wall deconstruction; Enzymatic hydrolysis; Saccharification; Lignocelluloses; Size reduction; Grinding; Nanocellulose; Nanofibers; Nanofibrils; Lignocellulose nanofibrils; Biofuel
Source: Web Of Science
Added: August 6, 2018

2013 journal article

On the Surface Interactions of Proteins with Lignin

ACS Applied Materials & Interfaces, 5(1), 199–206.

By: C. Salas*, O. Rojas*, L. Lucia*, M. Hubbe* & J. Genzer*

author keywords: adsorption; lignin; proteins; soy glycinin; beta-conglycinin; quartz crystal microbalance
MeSH headings : Adsorption; Antigens, Plant / chemistry; Antigens, Plant / metabolism; Diffusion; Globulins / chemistry; Globulins / metabolism; Hydrophobic and Hydrophilic Interactions; Lignin / chemistry; Lignin / metabolism; Mercaptoethanol / chemistry; Protein Denaturation; Seed Storage Proteins / chemistry; Seed Storage Proteins / metabolism; Soybean Proteins / chemistry; Soybean Proteins / metabolism; Surface Plasmon Resonance; Urea / chemistry; Water / chemistry
TL;DR: This work investigates the interactions at the solid-liquid interface of lignin with the two main proteins in soy, glycinin and β-conglycinin, and quantifies the extent of adsorption and the degree of hydration of the interfacial layers. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2013 journal article

Preferential Adsorption and Activity of Monocomponent Cellulases on Lignocellulose Thin Films with Varying Lignin Content

BIOMACROMOLECULES, 14(4), 1231–1239.

By: R. Martin-Sampedro*, J. Rahikainen*, L. Johansson*, K. Marjamaa*, J. Laine*, K. Kruus*, O. Rojas n

MeSH headings : Adsorption; Cellulases / chemistry; Cellulases / metabolism; Cellulose 1,4-beta-Cellobiosidase / chemistry; Cellulose 1,4-beta-Cellobiosidase / metabolism; Hydrolysis; Lignin / analysis; Lignin / chemistry; Trichoderma / enzymology; Trichoderma / metabolism
TL;DR: The interactions of monocomponent cellulases with cellulose and lignin substrates were investigated by using thin films supported on quartz crystal microgravimetry (QCM) resonators and EG-I displayed a clearly different interaction profile as a function of contact time registered by QCM. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Protein-assisted 2D assembly of gold nanoparticles on a polysaccharide surface

CHEMICAL COMMUNICATIONS, 49(13), 1318–1320.

By: L. Taajamaa*, O. Rojas n, J. Laine*, K. Yliniemi* & E. Kontturi*

MeSH headings : Adsorption; Animals; Cattle; Cellulose / chemistry; Gold / chemistry; Metal Nanoparticles / chemistry; Polysaccharides / chemistry; Serum Albumin, Bovine / chemistry; Surface Properties
TL;DR: Site-specific assembly of gold nanoparticles on a polysaccharide surface was accomplished via a straightforward method exploiting interfacial polymer blends, selective protein adsorption and electrostatic interaction. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Soy protein-nanocellulose composite aerogels

CELLULOSE, 20(5), 2417–2426.

By: J. Arboleda n, M. Hughes*, L. Lucia n, J. Laine*, K. Ekman* & O. Rojas*

author keywords: Composite aerogels; Soy proteins; Nanocellulose; Cellulose nanofibrils; Freeze casting; Nanofibrillated cellulose; Microfibrillated cellulose (MFC); NFC; Porous solids
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

Specific Binding of Immunoglobulin G with Bioactive Short Peptides Supported on Antifouling Copolymer Layers for Detection in Quartz Crystal Microgravimetry and Surface Plasmon Resonance

ANALYTICAL CHEMISTRY, 85(2), 1106–1113.

By: Y. Zhang n, N. Islam n, R. Carbonell n & O. Rojas n

MeSH headings : Binding Sites; Biofouling / prevention & control; Humans; Immunoglobulin G / chemistry; Particle Size; Peptides / chemical synthesis; Peptides / chemistry; Polymers / chemistry; Quartz Crystal Microbalance Techniques; Surface Plasmon Resonance; Surface Properties
TL;DR: The effect of copolymer molecular composition and analyte concentration was elucidated in order to design systems based on immobilized peptides for high signal-to-noise response and detection limits that meet the requirements for IgG biosensing in fluid matrixes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Specificity and Regenerability of Short Peptide Ligands Supported on Polymer Layers for Immunoglobulin G Binding and Detection

ACS APPLIED MATERIALS & INTERFACES, 5(16), 8030–8037.

By: Y. Zhang n, N. Islam n, R. Carbonell n & O. Rojas n

author keywords: short peptide ligands; immunoglobulin G detection; surface plasmon resonance; quartz crystal microgravimetry; regenerability; storage stability
MeSH headings : Electrophoresis, Polyacrylamide Gel; Humans; Immunoglobulin G / chemistry; Immunoglobulin G / isolation & purification; Ligands; Methacrylates / chemistry; Peptides / chemistry; Polyhydroxyethyl Methacrylate / chemistry; Polymers / chemistry; Protein Binding; Surface Plasmon Resonance
TL;DR: Results from sodium dodecyl sulfate polyacrylamide gel electrophoresis and fluorescence microscopy indicate that the bioactive system is highly specific to IgG and resistant to nonspecific interactions when tested in mixed protein solutions. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2013 journal article

The unusual interactions between polymer grafted cellulose nanocrystal aggregates

SOFT MATTER, 9(37), 8965–8973.

By: O. Rojas n, A. Lokanathan*, E. Kontturi*, J. Laine* & H. Bock*

Source: Web Of Science
Added: August 6, 2018

2013 journal article

Thermomechanical Properties of Lignin-Based Electrospun Nanofibers and Films Reinforced with Cellulose Nanocrystals: A Dynamic Mechanical and Nanoindentation Study

ACS APPLIED MATERIALS & INTERFACES, 5(22), 11768–11776.

By: M. Ago n, J. Jakes* & O. Rojas n

author keywords: cellulose nanocrystals; lignin; nanofibers; electrospinning; dynamic mechanical analysis; nanoindentation; thermomechanical properties; lignin films
MeSH headings : Cellulose / chemistry; Lignin / chemistry; Membranes, Artificial; Nanofibers / chemistry; Nanoparticles / chemistry; Polyvinyl Alcohol / chemistry
TL;DR: The thermomechanical performance of the lignin-based electrospun fibers and the spin-coated thin films was improved when they were embedded with CNCs, and insight was provided into the effect of addition of C NCs on the microphysical processes controlling the yield behavior in the composites. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2013 journal article

Transformation of lignocellulosic biomass during torrefaction

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, 100, 199–206.

By: J. Park n, J. Meng n, K. Lim*, O. Rojas n & S. Park n

author keywords: Lignocellulosic biomass; Torrefaction; Solid-state NMR; Non-protonated aromatic carbon; Methoxyl content analysis
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2013 journal article

Water-Wettable Polypropylene Fibers by Facile Surface Treatment Based on Soy Proteins

ACS APPLIED MATERIALS & INTERFACES, 5(14), 6541–6548.

By: C. Salas*, J. Genzer*, L. Lucia*, M. Hubbe* & O. Rojas*

author keywords: soy proteins; surface modification; polypropylene nonwovens; protein adsorption; wettability; wicking
MeSH headings : Adsorption; Antigens, Plant / chemistry; Antigens, Plant / metabolism; Fluorescein-5-isothiocyanate / chemistry; Globulins / chemistry; Globulins / metabolism; Polypropylenes / chemistry; Quartz Crystal Microbalance Techniques; Quaternary Ammonium Compounds / chemistry; Seed Storage Proteins / chemistry; Seed Storage Proteins / metabolism; Soybean Proteins / chemistry; Soybean Proteins / metabolism; Spectrometry, Fluorescence; Surface Plasmon Resonance; Surface Properties; Water / chemistry; Wettability
TL;DR: The results from wicking tests indicate that hydrophobic PP nonwovens absorb a significant amount of water after protein treatment, i.e., the PP-modified surfaces become completely hydrophilic. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

Adsorption of Glycinin and beta-Conglycinin on Silica and Cellulose: Surface Interactions as a Function of Denaturation, pH, and Electrolytes

BIOMACROMOLECULES, 13(2), 387–396.

By: C. Salas n, O. Rojas n, L. Lucia n, M. Hubbe n & J. Genzer n

MeSH headings : Adsorption; Antigens, Plant / chemistry; Cellulose / chemistry; Circular Dichroism; Electrolytes / chemistry; Globulins / chemistry; Hydrogen-Ion Concentration; Hydrophobic and Hydrophilic Interactions; Kinetics; Mercaptoethanol / chemistry; Osmolar Concentration; Protein Denaturation; Quartz Crystal Microbalance Techniques; Seed Storage Proteins / chemistry; Silicon Dioxide / chemistry; Solutions; Soybean Proteins / chemistry; Static Electricity; Surface Properties; Thermodynamics
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

All-Cellulose Composite Fibers Obtained by Electrospinning Dispersions of Cellulose Acetate and Cellulose Nanocrystals

JOURNAL OF POLYMERS AND THE ENVIRONMENT, 20(4), 1075–1083.

By: M. Vallejos*, M. Peresin* & O. Rojas n

author keywords: Cellulose acetate; Cellulose; All-cellulose composite; Nanofibers; Cellulose nanocrystals; Deacetylation; Electrospinning
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Bicomponent Lignocellulose Thin Films to Study the Role of Surface Lignin in Cellulolytic Reactions

BIOMACROMOLECULES, 13(10), 3228–3240.

MeSH headings : Adsorption; Biocatalysis; Cell Wall / chemistry; Cell Wall / metabolism; Cellulase / antagonists & inhibitors; Cellulase / chemistry; Cellulase / metabolism; Coated Materials, Biocompatible / chemistry; Coated Materials, Biocompatible / pharmacology; Enzyme Inhibitors / chemistry; Enzyme Inhibitors / pharmacology; Hydrolysis; Hydrophobic and Hydrophilic Interactions; Kinetics; Lignin / chemistry; Lignin / pharmacology; Quartz / chemistry; Silicon Dioxide / chemistry; Structure-Activity Relationship; Surface Properties
TL;DR: It is concluded that sensors based on the proposed ultrathin films of lignocellulose can facilitate a better understanding of the complex events that occur during bioconversion of cellulosic biomass. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

Bicomponent fibre mats with adhesive ultra-hydrophobicity tailored with cellulose derivatives

JOURNAL OF MATERIALS CHEMISTRY, 22(24), 12072–12082.

By: L. Taajamaa*, E. Kontturi*, J. Laine* & O. Rojas n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Boundary Lubrication of PEO-PPO-PEO Triblock Copolymer Physisorbed on Polypropylene, Polyethylene, and Cellulose Surfaces

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 51(7), 2931–2940.

By: Y. Li*, O. Rojas n & J. Hinestroza*

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Capillary flooding of wood with microemulsions from Winsor I systems

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 381, 171–179.

By: C. Carrillo n, D. Saloni n, L. Lucia n, M. Hubbe n & O. Rojas n

author keywords: Microemulsions; Flooding; Surfactants; Capillary structure; Biomass; Wood impregnation; Extraction
MeSH headings : Cyclohexenes / chemistry; Emulsions; Hydrophobic and Hydrophilic Interactions; Kinetics; Limonene; Oils / chemistry; Porosity; Surface-Active Agents / chemistry; Terpenes / chemistry; Thermodynamics; Viscosity; Water / chemistry; Wettability; Wood / chemistry
TL;DR: The concept proposed in this research is expected to open opportunities in fluid sorption in fiber systems for biomass pretreatment, and delivery of hydrophilic or lipophilic moieties in porous, lignocellulosics. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

Effect of residual lignin and heteropolysaccharides in nanofibrillar cellulose and nanopaper from wood fibers

CELLULOSE, 19(6), 2179–2193.

By: A. Ferrer*, E. Quintana*, I. Filpponen*, I. Solala*, T. Vidal*, A. Rodriguez*, J. Laine*, O. Rojas*

author keywords: Nanofibrillated cellulose (NFC); Nanopaper; Birch fibers; NFC films; Heteropolysaccharides; Hemicellulose; Water interactions; Mechanical properties; Mechanoradicals; Water interactions; Nanopaper strength; Microfluidization
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Generation of Functional Coatings on Hydrophobic Surfaces through Deposition of Denatured Proteins Followed by Grafting from Polymerization

BIOMACROMOLECULES, 13(5), 1371–1382.

By: K. Goli n, O. Rojas n, A. Oezcam & J. Genzer n

MeSH headings : Adsorption; Antigens, Plant / chemistry; Globulins / chemistry; Hydrophobic and Hydrophilic Interactions; Polymerization; Polypropylenes / chemistry; Protein Denaturation / drug effects; Protein Stability; Seed Storage Proteins / chemistry; Silanes / chemistry; Soybean Proteins / chemistry; Surface Properties; Temperature; Urea / pharmacology
TL;DR: Hydrophilic coatings were produced on flat hydrophobic substrates featuring n-octadecyltrichlorosilane (ODTS) and synthetic polypropylene (PP) nonwoven surfaces through the adsorption of denatured proteins, yielding enhanced wettability. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

Generic Method for Attaching Biomolecules via Avidin-Biotin Complexes Immobilized on Films of Regenerated and Nanofibrillar Cellulose

BIOMACROMOLECULES, 13(9), 2802–2810.

By: H. Orelma*, L. Johansson*, I. Filpponen*, O. Rojas n & J. Laine*

MeSH headings : Adsorption; Animals; Avidin / chemistry; Biotin / chemistry; Carboxymethylcellulose Sodium / chemistry; Cattle; Cellulose / chemistry; Cross-Linking Reagents / chemistry; Cyclic N-Oxides / chemistry; Humans; Immunoglobulin G / analysis; Immunoglobulin G / chemistry; Microscopy, Atomic Force; Oxidation-Reduction; Photoelectron Spectroscopy; Quartz Crystal Microbalance Techniques; Serum Albumin, Bovine / analysis; Serum Albumin, Bovine / chemistry; Solutions; Surface Properties
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Lignin-Based Electrospun Nanofibers Reinforced with Cellulose Nanocrystals

BIOMACROMOLECULES, 13(3), 918–926.

By: M. Ago n, K. Okajima*, J. Jakes*, S. Park n & O. Rojas n

MeSH headings : Calorimetry, Differential Scanning; Cellulose / chemistry; Electrochemical Techniques; Hydrogen Bonding; Lignin / chemistry; Microscopy, Electron, Scanning; Nanofibers / chemistry; Nanoparticles / chemistry; Nanotechnology; Particle Size; Thermogravimetry
TL;DR: The thermal stability of the system was observed to increase owing to a strong interaction of the lignin-PVA matrix with the dispersed CNCs, mainly via hydrogen bonding, as observed in Fourier transform infrared spectroscopy experiments. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

Mesoscopic Simulations of the Phase Behavior of Aqueous EO19PO29EO19 Solutions Confined and Sheared by Hydrophobic and Hydrophilic Surfaces

ACS APPLIED MATERIALS & INTERFACES, 4(1), 87–95.

By: H. Liu, Y. Li*, W. Krause*, M. Pasquinelli* & O. Rojas*

Contributors: H. Liu, Y. Li*, W. Krause*, M. Pasquinelli* & O. Rojas*

author keywords: triblock nonionic polymers; pluronics; MesoDyn; lubrication; boundary layer; spherical micelles; cylindrical micelles; wormlike micelles
TL;DR: It is indicated that aqueous triblock copolymers of poly(ethylene oxide) and poly(propylene oxide) (PPO) (Pluronics, EO(m)PO(n)EO(m)) act as a boundary lubricant for hydrophobic surfaces but not for hydphilic ones. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2012 journal article

Oil Spills Abatement: Factors Affecting Oil Uptake by Cellulosic Fibers

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 46(14), 7725–7730.

By: K. Payne n, C. Jackson n, C. Aizpurua n, O. Rojas n & M. Hubbe n

MeSH headings : Absorption; Cellulose / chemistry; Hydrophobic and Hydrophilic Interactions; Oils / isolation & purification; Petroleum Pollution / prevention & control; Succinic Anhydrides / chemistry; Water / chemistry; Wettability; Wood / chemistry
TL;DR: Wood-derived cellulosic fibers prepared in different ways were successfully employed to absorb simulated crude oil, demonstrating their possible use as absorbents in the case of oil spills. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Pickering emulsions stabilized by cellulose nanocrystals grafted with thermo-responsive polymer brushes

Journal of Colloid and Interface Science, 369(1), 202–209.

By: J. Zoppe n, R. Venditti n & O. Rojas n

author keywords: Pickering emulsions; Oil-in-water emulsions; Cellulose nanoparticles; Cellulose nanocrystals; Thermo-responsive emulsions; Poly(N-isopropylacrylamide); LCST; Grafts; Surface-initiated single-electron transfer; living radical polymerization
MeSH headings : Acrylic Resins / chemistry; Cellulose / chemistry; Emulsions / chemistry; Nanoparticles / chemistry; Nanoparticles / ultrastructure; Polymers / chemistry; Temperature
TL;DR: Cellulose nanocrystals from ramie fibers are studied as stabilizers of oil-in-water emulsions and the effect of temperature can be counterbalanced with the addition of salt which is explained by the reduction of electrostatic and steric interactions of poly(NIPAM)-g-CNCs at the oil-water interface. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2012 journal article

Piezoelectric Effect of Cellulose Nanocrystals Thin Films

ACS Macro Letters, 1(7), 867–870.

By: L. Csoka n, I. Hoeger n, O. Rojas n, I. Peszlen n, J. Pawlak n & P. Peralta n

Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2012 journal article

Surface Functionalized Nanofibrillar Cellulose (NFC) Film as a Platform for Immunoassays and Diagnostics

BIOINTERPHASES, 7(1-4).

By: H. Orelma*, I. Filpponen*, L. Johansson*, M. Osterberg*, O. Rojas n & J. Laine*

MeSH headings : Adsorption; Animals; Antibodies, Immobilized / chemistry; Antibodies, Immobilized / metabolism; Bioprinting / methods; Cattle; Cellulose / chemistry; Cyclic N-Oxides; Ethyldimethylaminopropyl Carbodiimide / chemistry; Humans; Immunoassay / instrumentation; Immunoassay / methods; Immunoglobulin G / chemistry; Immunoglobulin G / metabolism; Microscopy, Atomic Force; Microscopy, Confocal; Nanofibers / chemistry; Oxidation-Reduction; Quartz Crystal Microbalance Techniques; Serum Albumin, Bovine / chemistry; Succinimides / chemistry; Surface Properties
TL;DR: A new method to modify films of nanofibrillated cellulose (NFC) to produce non-porous, water-resistant substrates for diagnostics and demonstrates that antihuman IgG can be immobilized on the activated NFC surface using commercial piezoelectric inkjet printing. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2012 journal article

Survey of Soy Protein Flour as a Novel Dry Strength Agent for Papermaking Furnishes

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 60(39), 9828–9833.

By: H. Jin n, L. Lucia n, O. Rojas n, M. Hubbe n & J. Pawlak n

author keywords: soybean protein; papermaking; dry strength; mechanical properties
MeSH headings : Flour / analysis; Paper; Soybean Proteins / chemistry; Tensile Strength
TL;DR: Values of short span compression and tensile strength were the prime criteria for comparison based on industrial considerations and indicated that a 1 part soy protein to 3 parts cationic starch hybrid system resulted in the highest strength increase in comparison to solely either the soy protein or the cationIC starch as dry strength additives. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2012 journal article

The Soft-Confined Method for Creating Molecular Models of Amorphous Polymer Surfaces

JOURNAL OF PHYSICAL CHEMISTRY B, 116(5), 1570–1578.

By: H. Liu n, Y. Li*, W. Krause n, O. Rojas n & M. Pasquinelli n

Contributors: H. Liu n, Y. Li*, W. Krause n, O. Rojas n & M. Pasquinelli n

MeSH headings : Cellulose / chemistry; Molecular Dynamics Simulation; Polypropylenes / chemistry; Water / chemistry
TL;DR: A new method to produce molecular models for amorphous surface layers of polypropylene and cellulose was developed, which involved the use of a "soft" confining layer comprised of a xenon crystal that compacts the polymers into a density distribution and a degree of molecular surface roughness that corresponds well to experimental values. (via Semantic Scholar)
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2012 journal article

Valorization of residual Empty Palm Fruit Bunch Fibers (EPFBF) by microfluidization: Production of nanofibrillated cellulose and EPFBF nanopaper

BIORESOURCE TECHNOLOGY, 125, 249–255.

By: A. Ferrer*, I. Filpponen*, A. Rodriguez*, J. Laine* & O. Rojas n

author keywords: Empty Palm Fruit Bunch Fibers (EPFBF); Nanofibrillated cellulose (NFC); Film strength; Water interactions; Nanopaper
MeSH headings : Agriculture; Arecaceae / chemistry; Cellulose / chemistry; Fruit / chemistry; Industrial Waste / prevention & control; Microfluidics / methods; Nanostructures / chemistry; Palm Oil; Paper; Plant Oils / chemistry; Pressure; Surface Properties
TL;DR: Different cellulose pulps produced from sulfur-free chemical treatments of Empty Palm Fruit Bunch Fibers, a by-product from palm oil processing, generated distinct chemical and morphological characteristics and ensuing nanopaper properties that opens the possibility for valorization of such widely available bioresource. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2011 journal article

A comparative study of energy consumption and physical properties of microfibrillated cellulose produced by different processing methods

Cellulose, 18(4), 1097–1111.

By: K. Spence n, R. Venditti n, O. Rojas n, Y. Habibi n & J. Pawlak n

author keywords: Processing energy; Microfibrillated cellulose; Homogenization; Microfluidization; Micro-grinding; Nanofibrillated cellulose
UN Sustainable Development Goal Categories
7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2011 journal article

Adsorption and Association of a Symmetric PEO-PPO-PEO Triblock Copolymer on Polypropylene, Polyethylene, and Cellulose Surfaces

ACS APPLIED MATERIALS & INTERFACES, 3(7), 2349–2357.

By: Y. Li*, H. Liu*, J. Song*, O. Rojas n & J. Hinestroza*

TL;DR: The reported data suggests that the roughness of the surface, as well as its degree of hydrophobicity, have a large influence on the nature of the resulting adsorbed layer, explaining the behavior of finishing additives and lubricants commonly used in textile and fiber processing. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Adsorption of PEO-PPO-PEO Triblock Copolymers with End-Capped Cationic Chains of Poly(2-dimethylaminoethyl methacrylate)

LANGMUIR, 27(16), 9769–9780.

By: X. Liu*, A. Vesterinen*, J. Genzer*, J. Seppala* & O. Rojas*

MeSH headings : Adsorption; Ethylamines / chemistry; Methacrylates / chemistry; Polyethylene Glycols / chemistry; Polymers / chemistry; Propylene Glycols / chemistry; Surface Properties
TL;DR: The results obtained are much lower, as expected, when compared with results obtained at the air/liquid interface, where a tighter packing is observed, and the percentage of water coupled to the adsorbed cationic polymer decreases with solution ionic strength. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2011 journal article

Cellulose nanocrystals-based nanocomposites: fruits of a novel biomass research and teaching platform

Current Science, 100(8), 1172–1176.

By: X. Cao, Y. Habibi, W. Magalhaes, O. Rojas & L. Lucia

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Dielectrophoresis of cellulose nanocrystals and alignment in ultrathin films by electric field-assisted shear assembly

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 363(1), 206–212.

By: L. Csoka n, I. Hoeger n, P. Peralta n, I. Peszlen n & O. Rojas n

author keywords: Cellulose nanocrystals; Dielectrophoresis; Ultrathin films; Electric field; Shear assembly
MeSH headings : Algorithms; Cellulose / chemistry; Electromagnetic Fields; Electrophoresis; Membranes, Artificial; Nanoparticles / chemistry; Particle Size; Surface Properties
TL;DR: Calculated dipole moments and Clausius-Mossotti factors allowed the determination of the critical frequencies, the peak dielectrophoresis as well as the principal orientation of the CNCs in the ultrathin films. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2011 journal article

Multilayers of Low Charge Density Polyelectrolytes on Thin Films of Carboxymethylated and Cationic Cellulose

JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 25(6-7), 643–660.

By: Z. Wang n, P. Hauser n, J. Laine* & O. Rojas n

author keywords: Polyelectrolyte multilayer; adsorption; cationic cellulose; anionic cellulose; cotton; adhesion; QCM
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Multilayers of Weak Polyelectrolytes of Low and High Molecular Mass Assembled on Polypropylene and Self-Assembled Hydrophobic Surfaces

LANGMUIR, 27(8), 4541–4550.

By: X. Liu n, K. Goli*, J. Genzer* & O. Rojas*

MeSH headings : Electrolytes / chemistry; Hydrophobic and Hydrophilic Interactions; Molecular Weight; Polyelectrolytes; Polymers / chemistry; Polypropylenes / chemistry; Surface Properties
TL;DR: The assembly of highly dissipative polyelectrolyte multilayers (PEMs) is demonstrated by quartz crystal microgravimetry and shows that, despite the expected interdiffusion for the different polymer chains, there is a net macromolecular segregation to the free surface. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2011 journal article

Permeation of a cationic polyelectrolyte into mesoporous silica Part 3. Using adsorption isotherms to elucidate streaming potential results

Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 381(1-3), 1–6.

By: M. Hubbe, N. Wu, O. Rojas & S. Park

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Phase-specific pore growth in ultrathin bicomponent films from cellulose-based polysaccharides

SOFT MATTER, 7(21), 10386–10394.

By: L. Taajamaa*, O. Rojas n, J. Laine* & E. Kontturi*

Source: Web Of Science
Added: August 6, 2018

2011 journal article

Self-Bonding Boards From Plantain Fiber Bundles After Enzymatic Treatment: Adhesion Improvement of Lignocellulosic Products by Enzymatic Pre-Treatment

JOURNAL OF POLYMERS AND THE ENVIRONMENT, 19(1), 182–188.

By: C. Alvarez*, B. Rojano*, O. Almaza*, O. Rojas n & P. Ganan*

author keywords: Self-bonding; Plantain fibers; Laccase; Boards; Free radicals
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2011 journal article

Surface Interaction Forces of Cellulose Nanocrystals Grafted with Thermoresponsive Polymer Brushes

Biomacromolecules, 12(7), 2788–2796.

By: J. Zoppe n, M. Österberg*, R. Venditti n, J. Laine* & O. Rojas n

MeSH headings : Acrylamides / chemistry; Acrylic Resins; Cellulose / chemistry; Nanoparticles / chemistry; Particle Size; Polymers / chemistry; Sodium Chloride / chemistry; Surface Properties; Temperature
TL;DR: The decreased mobility of polymer brushes upon partial collapse and decreased availability of hydrogen bonding sites with higher electrolyte concentration were hypothesized as the main reasons for the less prominent polymer bridging between interacting surfaces. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2011 journal article

Water vapor barrier properties of coated and filled microfibrillated cellulose composite films

BioResources, 6(4), 4370–4388.

By: K. Spence n, R. Venditti n, O. Rojas n, J. Pawlak n & M. Hubbe n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2010 journal article

Adsorption of a Nonionic Symmetric Triblock Copolymer on Surfaces with Different Hydrophobicity

LANGMUIR, 26(12), 9565–9574.

MeSH headings : Adsorption; Hydrophobic and Hydrophilic Interactions; Microscopy, Atomic Force; Polymers / chemistry; Surface Plasmon Resonance; Surface Properties
TL;DR: In insights are provided into the structure and stability of both hydrated and nonhydrated adsorbed triblock copolymer, which produce modest increases in hydrophilicity of all the substrates investigated. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (Web of Science; OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2010 review

Cellulose Nanocrystals: Chemistry, Self-Assembly, and Applications

[Review of ]. CHEMICAL REVIEWS, 110(6), 3479–3500.

By: Y. Habibi n, L. Lucia n & O. Rojas n

MeSH headings : Cellulose / chemistry; Esterification; Nanoparticles / chemistry; Nanoparticles / ultrastructure; Oxidation-Reduction; Polymers / chemistry; Surface Properties
TL;DR: Dr. Youssef Habibi’s research interests include the sustainable production of materials from biomass, development of high performance nanocomposites from lignocellulosic materials, biomass conversion technologies, and the application of novel analytical tools in biomass research. (via Semantic Scholar)
UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2010 journal article

Development of Langmuir-Schaeffer Cellulose Nanocrystal Monolayers and Their Interfacial Behaviors

LANGMUIR, 26(2), 990–1001.

By: Y. Habibi n, I. Hoeger n, S. Kelley n & O. Rojas n

MeSH headings : Cellulose / chemistry; Membranes, Artificial; Microscopy, Atomic Force; Models, Theoretical; Nanoparticles / chemistry; Nanotechnology; Photoelectron Spectroscopy; Quaternary Ammonium Compounds / chemistry; Surface Properties; Surface-Active Agents / chemistry
TL;DR: It is concluded that the Langmuir-Schaeffer method can be used to produce single coating layers of CNs that were shown to be smooth, stable, and strongly attached to the solid support. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2010 journal article

Effect of Charge Asymmetry on Adsorption and Phase Separation of Polyampholytes on Silica and Cellulose Surfaces

JOURNAL OF PHYSICAL CHEMISTRY B, 114(2), 719–727.

By: J. Song n, T. Yamagushi n, D. Silva n, M. Hubbe n & O. Rojas n

MeSH headings : Adsorption; Buffers; Cellulose / chemistry; Phase Transition; Silicon Dioxide / chemistry; Static Electricity; Surface Properties
TL;DR: Under the same experimental conditions, the polyampholytes had a higher nominal charge density phase-separated near the interface, producing a soft, dissipative, and loosely bound layer, and electrostatic and polarization effects were concluded to be less significant. (via Semantic Scholar)
Source: Web Of Science
Added: August 6, 2018

2010 journal article

Effect of Moisture on Electrospun Nanofiber Composites of Poly(vinyl alcohol) and Cellulose Nanocrystals

BIOMACROMOLECULES, 11(9), 2471–2477.

By: M. Peresin n, Y. Habibi n, A. Vesterinen n, O. Rojas n, J. Pawlak n & J. Seppala n

TL;DR: Results indicated that the stabilizing effect of the CNs in the PVA matrix might be compromised by water absorption, disrupting the hydrogen bonding within the structure, and a reversible recovery in mechanical strength after cycling the relative humidity. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2010 journal article

Monitoring Cellulase Protein Adsorption and Recovery Using SDS-PAGE

Industrial & Engineering Chemistry Research, 49(18), 8333–8338.

By: G. Hu n, J. Heitmann n, O. Rojas n, J. Pawlak n & D. Argyropoulos n

TL;DR: The cellul enzyme system from Trichoderma reesei had a higher adsorption on all substrates studied than the cellulase system from Aspergillius niger, and higher pH favored desorption from the substrate studied. (via Semantic Scholar)
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2010 journal article

Nanofiber Composites of Polyvinyl Alcohol and Cellulose Nanocrystals: Manufacture and Characterization

BIOMACROMOLECULES, 11(3), 674–681.

By: M. Peresin n, Y. Habibi n, J. Zoppe n, J. Pawlak n & O. Rojas n

MeSH headings : Calorimetry, Differential Scanning; Cellulose / chemistry; Hydrogen Bonding; Microscopy, Electron, Scanning; Nanofibers; Nanoparticles; Polyvinyl Alcohol / chemistry; Spectroscopy, Fourier Transform Infrared; Temperature
TL;DR: The elastic modulus of the nanocomposite mats increased significantly as a consequence of the reinforcing effect of CNs via the percolation network held by hydrogen bonds, but this organization-driven crystallization was limited as observed by the reduction in the degree of crystallinity of the CN-loaded composite fibers. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2010 journal article

Permeation of a cationic polyelectrolyte into meso-porous silica Part 1. Factors affecting changes in streaming potential

Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 364(1-3), 1–6.

By: N. Wu, M. Hubbe, O. Rojas & S. Park

Source: NC State University Libraries
Added: August 6, 2018

2010 journal article

Permeation of a cationic polyelectrolyte into mesoporous silica. Part 2. Effects of time and pore size on streaming potential

Colloids and Surfaces A: Physicochemical and Engineering Aspects, 364(1-3), 7–15.

By: M. Hubbe n, N. Wu n, O. Rojas n & S. Park n

author keywords: Permeation; Polyelectrolyte; Silica gel; Pore size; Time; Streaming potential; Desorption; Salt concentration; Molecular mass
Sources: Web Of Science, Crossref, NC State University Libraries
Added: August 6, 2018

2010 journal article

Poly(<i>N</i>-isopropylacrylamide) Brushes Grafted from Cellulose Nanocrystals via Surface-Initiated Single-Electron Transfer Living Radical Polymerization

Biomacromolecules, 11(10), 2683–2691.

By: J. Zoppe n, Y. Habibi n, O. Rojas n, R. Venditti n, L. Johansson n, K. Efimenko n, M. Österberg n, J. Laine n

MeSH headings : Acrylamides / chemical synthesis; Acrylamides / chemistry; Acrylic Resins; Boehmeria / chemistry; Calorimetry, Differential Scanning; Cellulose / chemistry; Chromatography, Gel; Electron Transport; Nanoparticles / chemistry; Photoelectron Spectroscopy; Polymerization; Polymers / chemical synthesis; Polymers / chemistry; Spectroscopy, Fourier Transform Infrared; X-Ray Diffraction
TL;DR: It is expected that suspension stability, interfacial interactions, friction, and other properties of grafted CNCs can be controlled by changes in temperature and provide a unique platform for further development of stimuli-responsive nanomaterials. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2010 journal article

The effect of chemical composition on microfibrillar cellulose films from wood pulps: Mechanical processing and physical properties

Bioresource Technology, 101(15), 5961–5968.

By: K. Spence n, R. Venditti n, Y. Habibi n, O. Rojas n & J. Pawlak n

author keywords: MFC films; Chemical composition; Hornification; Homogenization; Lignin-containing microfibrillated cellulose
MeSH headings : Cellulase / chemistry; Cellulose / chemistry; Materials Testing; Membranes, Artificial; Paper; Stress, Mechanical; Surface Properties; Tensile Strength; Wood / chemistry
TL;DR: Interestingly, after homogenization, the presence of lignin significantly increased film toughness, tensile index, and elastic modulus, indicating that MFC films can potentially be made from low-cost recycled cellulosic materials. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2010 journal article

The effect of chemical composition on microfibrillar cellulose films from wood pulps: water interactions and physical properties for packaging applications

Cellulose, 17(4), 835–848.

By: K. Spence n, R. Venditti n, O. Rojas n, Y. Habibi n & J. Pawlak n

author keywords: Water interactions; Lignin-containing microfibrillated cellulose (MFC); Specific surface area; Hard-to-remove water; Nanofibrillar cellulose (NFC)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2009 journal article

Development and characterization of thin polymer films relevant to fiber processing

THIN SOLID FILMS, 517(15), 4348–4354.

author keywords: Polymers; Textiles; Adsorption; Tribology
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Dispersion of Cellulose Crystallites by Nonionic Surfactants in a Hydrophobic Polymer Matrix

POLYMER ENGINEERING AND SCIENCE, 49(10), 2054–2061.

By: J. Kim n, G. Montero n, Y. Habibi n, J. Hinestroza*, J. Genzer n, D. Argyropoulos n, O. Rojas n

Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 journal article

Electrospun Nanocomposites from Polystyrene Loaded with Cellulose Nanowhiskers

JOURNAL OF APPLIED POLYMER SCIENCE, 113(2), 927–935.

By: O. Rojas n, G. Montero n & Y. Habibi n

author keywords: cellulose; electrospinning; mechanical properties; microfibers; nanocomposites; nanoparticles
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2009 chapter

Evaluation of adsorbed polyampholyte layers by using quartz crystal microbalance

In C. A. O. do N. R. M. De Brito Alves & E. C. Biscaia (Eds.), 10th International Symposium on Process Systems Engineering -- (Computer-aided chemical engineering, 7). Amsterdam: Elsevier.

By: D. Silva, O. Rojas, S. Park & M. Hubbe

Ed(s): C. R. M. De Brito Alves & E. Biscaia

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

In Situ Monitoring of Cellulase Activity by Microgravimetry with a Quartz Crystal Microbalance

JOURNAL OF PHYSICAL CHEMISTRY B, 113(44), 14761–14768.

By: G. Hu n, J. Heitmann n & O. Rojas n

MeSH headings : Biosensing Techniques; Cellulase / chemistry; Cellulase / metabolism; Cellulose / chemistry; Cellulose / metabolism; Gold / chemistry; Hydrolysis; Kinetics; Quartz / chemistry; Temperature
TL;DR: Quartz crystal microgravimetry was used to investigate the interactions between cellulase enzymes and model cellulose substrates and cellulase adsorption was found to be nonspecific and irreversible on gold-, PVAm-, and cellulose-coated quartz crystal sensors. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2009 chapter

Interfacial properties of sugar-based surfactants

In Bio-based surfactants and detergents: Synthesis, properties, and applications. Urbana, IL: AOCS Press.

By: O. Rojas, L. Lucia, Y. Habibi & C. Stubenrauch

Source: NC State University Libraries
Added: August 6, 2018

2009 conference paper

Investigation of adsorption behaviors of polyampholytes

Kami Parupu Kenkyu? Happyo?kai: Ko?en yo?shishu?, 76, 6–9.

By: T. Yamaguchi, M. Hubbe & O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

Polyampholytes: Their use in papermaking and their solution and adsorption behaviors

O Papel, 70(9), 40–50.

By: D. Silva, O. Rojas, M. Hubbe, S. Park, T. Yamaguchi & J. Song

Source: NC State University Libraries
Added: August 6, 2018

2009 journal article

Quantification of Cellulase Activity Using the Quartz Crystal Microbalance Technique

ANALYTICAL CHEMISTRY, 81(5), 1872–1880.

By: G. Hu n, J. Heitmann n & O. Rojas n

MeSH headings : Cellulase / chemistry; Cellulase / metabolism; Cellulose / metabolism; Crystallization; Electrochemistry / methods; Equipment Design; Models, Chemical; Nanotechnology; Quartz / chemistry; Surface Properties
TL;DR: A new method to determine the activity of cellulase has been developed using a quartz crystal microbalance (QCM) technique, and it is shown that the QCM technique provides results closer to those obtained by measuring the actual reducing sugars. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2009 journal article

Reinforcing Poly(ε-caprolactone) Nanofibers with Cellulose Nanocrystals

ACS Applied Materials & Interfaces, 1(9), 1996–2004.

By: J. Zoppe n, M. Peresin n, Y. Habibi n, R. Venditti n & O. Rojas n

author keywords: cellulose nanocrystals; nanocrystalline cellulose; cellulose whiskers; surface grafting; electrospinning; fiber reinforcement; nanofibers; nanocomposites; nanoparticles; poly(epsilon-caprolactone)
MeSH headings : Calorimetry, Differential Scanning; Cellulose / chemistry; Materials Testing; Microscopy, Electron, Scanning; Microscopy, Electron, Transmission; Nanofibers / chemistry; Nanoparticles / chemistry; Nanostructures / chemistry; Nanotechnology / methods; Polyesters / chemistry; Spectroscopy, Fourier Transform Infrared; Surface Properties; Temperature; Thermogravimetry; Tissue Engineering / instrumentation
TL;DR: Compared to the case of grafted nanocrystals, the unmodified ones imparted better morphological homogeneity to the nanofibrillar structure as well as thermal and mechanical properties of filled and unfilled nanofibers after reinforcement with unmodified CNXs. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2009 journal article

Sugar surfactants in paper recycling

Nordic Pulp & Paper Research Journal, 24(1), 107–111.

By: K. Spence n, R. Venditti n & O. Rojas n

author keywords: Sugar surfactants; Natural surfactants; Protein surfactants; Paper recycling; Flotation deinking; Quartz crystal microbalance; Alkyl phenol ethoxylates; Copy paper; model inks
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2009 chapter

Tools to probe nanoscale surface phenomena in cellulose thin films: Applications in the area of adsorption and friction

In L. A. Lucia & O. J. Rojas (Eds.), The nanoscience and technology of renewable biomaterials.

By: S. Song n, Y. Li*, J. Hinestroza* & O. Rojas n

Ed(s): L. Lucia & O. Rojas n

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Cellulosic nanocomposites: A review

BioResources, 3(3), 929–980.

By: M. Hubbe, O. Rojas, L. Lucia & M. Sain

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Colloidal stability and aggregation of lignocellulosic materials in aqueous suspension: A review

BioResources, 3(4), 1419–1491.

By: M. Hubbe & O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2008 journal article

Enzymatic Hydrolysis of Native Cellulose Nanofibrils and Other Cellulose Model Films: Effect of Surface Structure

LANGMUIR, 24(20), 11592–11599.

By: S. Ahola n, X. Turon n, M. Osterberg n, J. Laine n & O. Rojas n

MeSH headings : Adsorption; Cellulase / chemistry; Cellulose / chemistry; Crystallization; Hydrogen-Ion Concentration; Hydrolysis; Microscopy, Atomic Force / methods; Nanoparticles / chemistry; Nanotechnology / methods; Surface Properties; Time Factors; Trichoderma / metabolism
TL;DR: The hydrolytic potential of the cellulase mixture was found to be considerably affected by the nature of the substrates, especially their crystallinity and morphology, which affected the rate of enzymatic degradation of the nanofibril films much faster compared to the other types of cellulosic films. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Enzymatic kinetics of cellulose hydrolysis: A QCM-D study

LANGMUIR, 24(8), 3880–3887.

By: X. Turon n, O. Rojas n & R. Deinhammer n

MeSH headings : Cellulose / metabolism; Crystallization; Glycoside Hydrolases / metabolism; Glycoside Hydrolases / ultrastructure; Hydrolysis; Kinetics; Microscopy, Atomic Force; Models, Biological; Protein Binding; Quartz; Substrate Specificity; Trichoderma / enzymology
TL;DR: It is demonstrated that the variations registered in QCM frequency and dissipation of the film are indicative of mass and morphological transformations due to enzyme activities; these include binding phenomena, progressive degradation of the cellulose film, existence of residual, recalcitrant cellulose fragments, and the occurrence of other less apparent changes throughout the course of incubation. (via Semantic Scholar)
UN Sustainable Development Goal Categories
10. Reduced Inequalities (OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2008 journal article

Feedstock pretreatment strategies for producing ethanol from wood, bark, and forest residues

BioResources, 3(1), 270–294.

By: G. Hu, J. Heitmann & O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2008 conference paper

Penetration of high-charge cationic polymers into silica gel particles and cellulosic fibers

Proceedings of the 2nd IPEC Conference, Book B, 626–649. Tianjin, China: Tianjin University of Science & Technology.

By: N. Wu, M. Hubbe, O. Rojas & T. Yamaguchi

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Charge and the dry-strength performance of polyampholytes. Part 2. Colloidal effects

Colloids and Surfaces. A, Physicochemical and Engineering Aspects, 301, 23–32.

By: M. Hubbe n, O. Rojas n, D. Argyropoulos n, Y. Wang n, J. Song n, N. Sulic n, T. Sezaki

Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2007 journal article

Charge and the dry-strength performance of polyampholytes. Part 3: Streaming potential analysis

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 301(1-3), 33–40.

By: Y. Wang n, M. Hubbe n, O. Rojas n, D. Argyropoulos n, X. Wang n & T. Sezaki

author keywords: polyampholytes; dry strength; paper strength; streaming potential; electrokinetics; polyaluminum chloride
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 journal article

Consequences of the nanoporosity of cellulosic fibers on their streaming potential and their interactions with cationic polyelectrolytes

CELLULOSE, 14(6), 655–671.

By: M. Hubbe n, O. Rojas n, L. Lucia n & T. Jung*

author keywords: adsorption; cellulose; polyelectrolytes; porosity; streaming potential
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 journal article

Distinctive electrokinetic behavior of nanoporous silica particles treated with cationic polyelectrolyte

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 292(2-3), 271–278.

By: M. Hubbe n, O. Rojas n, S. Lee n, S. Park n & Y. Wang n

author keywords: streaming potential; pores; nanopores; polyelectrolytes
UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 article

Fiber nanotechnology: a new platform for "green" research and technological innovations

Lucia, L. A., & Rojas, O. J. (2007, December). CELLULOSE, Vol. 14, pp. 539–542.

By: L. Lucia n & O. Rojas n

TL;DR: The salient features of the subjects contained in this special issue are pointed out, and the value of natural biopolymers and biochemicals from forests and crops are stressed as precursors for nanotechnological applications. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 chapter

Lignin as emulsion stabilizers: Materials, chemicals and energy from forest biomass

In Materials, chemicals and energy from forest biomass (Vol. 954, pp. 182–199). Washington, DC: ACS Books.

By: O. Rojas, J. Bullon, F. Ysambertt, A. A., . D. S. & J. Salager

Source: NC State University Libraries
Added: August 6, 2018

2007 chapter

Measurement of cellulase activity with piezoelectric resonators

In Materials, chemicals and energy from forest biomass (Vol. 954, pp. 478–494). Washington, DC: ACS Books.

By: O. Rojas, C. Jheong, X. Turon & D. Argyropoulos

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Nanotechnology: a fiber perspective

Cellulose, 14(6).

By: L. Lucia, O. Rojas & eds.

Source: NC State University Libraries
Added: August 6, 2018

2007 chapter

Oxidative chemistry of lignin In supercritical carbon dioxide & expanded liquids

Oxidative chemistry of lignin In supercritical carbon dioxide & expanded liquids. In Materials, chemicals and energy from forest biomass (Vol. 954, pp. 311–331).

By: D. Argyropoulos n, C. Saquing n, A. Gaspar n, N. Soriano n, L. Lucia n & O. Rojas n

UN Sustainable Development Goal Categories
6. Clean Water and Sanitation (OpenAlex)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2007 journal article

Unique behavior of polyampholytes as dry-strength agents

Appita Journal, 60(2), 106–111.

By: M. Hubbe, O. Rojas, N. Sulic & T. Sezaki

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Water treatment in papermaking white water loops using membrane separation techniques

Revista Tecnica De La Facultad De Ingenieria Universidad Del Zulia, 30, 90–97.

By: J. Bullon, L. Rennola, F. Salazar, M. Hoeger, A. Cardenas & O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

What happens to cellulosic fibers during papermaking and recycling? A review

BioResources, 2(4), 739–788.

By: M. Hubbe, R. Venditti & O. Rojas

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Aspects of retention and formation - The role of polyampholyte charge density on its interactions with cellulose

Nordic Pulp & Paper Research Journal, 21(5), 638–645.

By: Y. Wang, M. Hubbe, T. Sezaki, X. Wang, O. Rojas & D. Argyropoulos

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Charge and the dry-strength performance of polyampholytes. Part 1, Handsheet properties and polymer solution viscosity

Journal of Pulp and Paper Science, 32(3), 156–162.

By: J. Song, Y. Wang, M. Hubbe, O. Rojas, N. Sulic & T. Sezaki

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Control of tacky deposits on paper machines - A review

Nordic Pulp & Paper Research Journal, 21(2), 154–171.

By: M. Hubbe, O. Rojas & R. Venditti

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Lignin separation from kraft black liquors by tangential ultrafiltration

Chimica E L'Industria, 88(1), 88–95.

By: O. Rojas, J. Song & D. Argyropoulos

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Quantitative P-31 NMR detection of oxygen-centered and carbon-centered radical species

BIOORGANIC & MEDICINAL CHEMISTRY, 14(12), 4017–4028.

By: D. Argyropoulos n, H. Li n, A. Gaspar n, K. Smith*, L. Lucia n & O. Rojas n

MeSH headings : Carbon / chemistry; Cyclic N-Oxides / chemical synthesis; Cyclic N-Oxides / chemistry; Free Radicals / chemistry; Hydrogen Peroxide / chemistry; Hydrogen-Ion Concentration; Kinetics; Magnetic Resonance Spectroscopy / methods; Molecular Structure; Organophosphonates / chemical synthesis; Organophosphonates / chemistry; Oxygen / chemistry; Peroxides / chemistry; Phosphorus Isotopes; Superoxides / chemistry
TL;DR: The developed (31)P NMR technique forms the foundations for a targeted understanding of the nature, identity, and mechanisms of radical activity in a variety of biomolecular processes. (via Semantic Scholar)
UN Sustainable Development Goal Categories
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 journal article

Salt-induced depression of lower critical solution temperature in a surface-grafted neutral thermoresponsive polymer

MACROMOLECULAR RAPID COMMUNICATIONS, 27(9), 697–701.

By: Y. Jhon n, R. Bhat n, C. Jeong n, O. Rojas n, I. Szleifer* & J. Genzer n

author keywords: atom transfer radical polymerization (ATRP); grafted polymers; poly(N-isopropylacrylamide) (PNIPAM); polymer brushes; quartz crystal microbalance (QCM-D); surface-initiated polymerization; thermoresponsive polymer
UN Sustainable Development Goal Categories
15. Life on Land (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 review

Short-range interactions between non-ionic surfactant layers

[Review of ]. Physical Chemistry Chemical Physics, 8(47), 5501–5514.

By: P. Claesson, M. Kjellin, O. Rojas & C. Stubenrauch

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

Supercritical CO2 oxidation of lignin: Production of high valued added products

Chimica E L'Industria, 88(1), 74–79.

By: D. Argyropoulos, A. Gaspar, L. Lucia. & R. J.

Source: NC State University Libraries
Added: August 6, 2018

2006 journal article

The role of polyampholyte charge density on its interactions with cellulose

Nordic Pulp & Paper Research Journal, 21(5), 158–165.

By: Y. Wang, M. Hubbe, T. Sezaki, X. Wang, O. Rojas & D. Argyropoulos

Source: NC State University Libraries
Added: August 6, 2018

2005 journal article

Adsorption of poly(ethylene oxide)-b-poly(E-caprolactone) copolymers at the silica-water interface

LANGMUIR, 21(7), 2930–2940.

By: