TY - CONF TI - Using Conductive Inks and Nonwovens for Wearable Computing AU - Karaguzel, B. AU - Merritt, C.R. AU - Kang, Tae-Ho AU - Wilson, J. AU - Franzon, P. AU - Nagle, H.T. AU - Grant, E. AU - Pourdeyhimi, B. T2 - 2005 Textile Institute World Conference C2 - 2005/// C3 - Proceedings of the 2005 Textile Institute World Conference CY - Raleigh, NC DA - 2005/// PY - 2005/3/23/ SP - Paper 15 ER - TY - CONF TI - Electrical Characterization of Transmission Lines on Specific Nonwoven Substrates, Poster AU - Merritt, C.R. AU - Karaguzel, B. AU - Kang, T.-H. AU - Wilson, J. AU - Franzon, P.D. AU - Pourdeyhimi, B. AU - Nagle, H.T. AU - Grant, E. T2 - 2005 Textile Institute World Conference C2 - 2005/// CY - Raleigh, NC DA - 2005/// PY - 2005/3/23/ ER - TY - CONF TI - The Future of Fiber Research & Development AU - Pourdeyhimi, B. T2 - Fiber Society Fall 2005 Annual Conference C2 - 2005/// CY - NJ Institute of Technology, Newwark, NJ DA - 2005/// PY - 2005/10/17/ ER - TY - CONF TI - Industry-Government-University Research Partnerships AU - Pourdeyhimi, B. T2 - Licensing Executive Society Spring Meeting C2 - 2005/// CY - Raleigh, N.C DA - 2005/// PY - 2005/5/4/ ER - TY - JOUR TI - Electrical Characterization of Transmission Lines on Nonwoven Textile Substrates AU - Merritt, Carey R. AU - Karaguze, Burcak AU - Kang, Tae-Ho AU - Wilson, John M. AU - Franzon, Paul D. AU - Nagle, H. Troy AU - Pourdeyhimi, Behnam AU - Grant, Edward T2 - MRS Proceedings DA - 2005/// PY - 2005/// DO - 10.1557/proc-870-h4.7 VL - 870 SP - H4.7 J2 - MRS Proc. LA - en OP - SN - 0272-9172 1946-4274 UR - http://dx.doi.org/10.1557/proc-870-h4.7 DB - Crossref ER - TY - JOUR TI - Advances in fuel cells AU - Zhang, X. T2 - DA - 2005/// PY - 2005/// VL - ER - TY - JOUR TI - Solvent-free composite peo-ceramic fiber/mat electrolytes for lithium secondary cells AU - Wang, C. AU - Zhang, X. AU - Appleby, A. J. T2 - Journal of the Electrochemical Society AB - Solvent-free composite poly(ethylene oxide) (PEO)-ceramic fiber or mat electrolytes with high ionic conductivity and good interfacial stability have been developed using high-ionic-conductivity fibers and mats. The conducting ceramic fibers can penetrate the cross section of the electrolyte film to provide long-range lithium-ion transfer channels, thus producing composite electrolytes with high conductivity. In this work, a maximum room-temperature conductivity of S cm−1 was achieved for 20 wt % fiber in a PEO- mixture containing 12.5 wt % in PEO. The maximum transference number obtained was 0.7. The ceramic fibers in this composite electrolyte are coated by a very thin PEO layer, which is sufficient to provide good interfacial stability with lithium-ion and lithium-metal anodes. © 2004 The Electrochemical Society. All rights reserved. DA - 2005/// PY - 2005/// DO - https://doi.org/10.1149/1.1828952 VL - 152 ER - TY - JOUR TI - Ionic transport and interfacial stability of sulfonate-modified fumed silicas as nanocomposite electrolytes AU - Zhang, X. W. AU - Fedkiw, P. S. T2 - Journal of the Electrochemical Society AB - Degussa A200 and R711 fumed silica surfaces were modified by attaching lithium sulfonate groups through alkyl or oligomer chains, respectively, in an attempt to form single-ion conducting fumed silicas: A200-lithium propanesulfonate (A200-LiPS), R711-poly(lithium vinylsulfonate) (R711-pLiVS), and R711-poly(lithium 2-acrylamido-2-methyl-1-propanesulfonate) (R711-pLiAMPS). Conductivity, lithium transference number, and Li/electrolyte interfacial stability measurements were conducted on nanocomposite electrolytes prepared by dispersing the conducting fumed silicas into solvents consisting of oligomeric polyethylene glycol dimethyl ether (PEGdm), polyethylene oxide (PEO), or PEGdm/PEO blends. Among the three sulfonate-modified fumed silicas, the highest conductivity was always obtained using R711-pLiAMPS. A maximum room-temperature conductivity of was obtained at a surface concentration of and a Li:O mole ratio of 1:100 ( filler). The maximum lithium transference number achieved for the same R711-pLiAMPS-based system is 0.78 at a surface concentration of and a Li:O mole ration of 1:20 ( filler). Adding lithium salts to the solvent, such as lithium bis(trifluoromethylsulfonyl)imide (LiTFSI), lithium bis(perfluoroethylenesulfonyl)imide (LiBETI), lithium bis(oxalato)borate (LiBOB), and lithium phosphate , increases room-temperature conductivity and interfacial stability while maintaining relatively high lithium transference numbers. DA - 2005/// PY - 2005/// DO - https://doi.org/10.1149/1.2109661 VL - 152 ER - TY - JOUR TI - Impedance spectra of carbon black filled high-density polyethylene composites AU - Wang, Y. J. AU - Pan, Y. AU - Zhang, X. AU - Tan, K. T2 - Journal of Applied Polymer Science AB - Abstract Carbon black (CB) filled high‐density polyethylene (HDPE) composites are prepared by ordinary blending for use as an electrical conductive polymer composite. The composite changes from an electrical insulator to a conductor as the CB content is increased from 10 to 20 wt %, which is called the percolation region. For explanatory purposes, three models, namely, “conduction via nonohmic contacting chain,” “conduction via ohmic contacting chain,” and a mixture of them corresponding to the conductions in the percolation region, high CB loading region, and limiting high CB loading are proposed by the reasonable configurations of aggregate resistance, contact resistance, gap capacitance, and joining aggregates induction. The characters of the impedance spectra based on the three models are theoretically analyzed. In order to find some link between the electrical conductivity and the CB dispersion manner in the composites, the impedance spectra of three samples, HDPE/15 wt % CB (the center of the percolation region), HDPE/25 wt % CB (a typical point in the high CB loading region), and HDPE/19 wt % CB (the limiting high CB loading region), are measured by plotting the impedance modulus and phase angle against the frequency and by drawing the Cole–Cole circle of the imaginary part and real part of the impedance modulus of each sample. The modeled approached spectra and the spectra measured on the three samples are compared and the following results are found: the measured impedance spectrum of HDPE/15 wt % CB (percolation region) is quite close to the model of conduction via nonohmic contacting chain. The character of the measured spectrum of HDPE/25 wt % CB consists of the form of the model of conduction via ohmic contacting chain. The impedance behavior of HDPE/19 wt % CB exhibits a mixture of the two models. From the comparisons, it is concluded that the electrical conducting network in the percolation region of the CB filled HDPE composite is composed of aggregate resistance, nonohmic contact resistance, and gap capacitance, and that of the high CB loading region consists of continuously joined CB aggregate chains, which are possibly wound and assume helix‐like (not straight lines) conductive chains, acting as electrical inductions as the current passes through. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1344–1350, 2005 DA - 2005/// PY - 2005/// DO - https://doi.org/10.1002/app.22297 VL - 98 ER - TY - CHAP TI - A Brief Overview of Fuel Cells AU - Zhang, Xiangwu T2 - Advances in Fuel Cells A2 - Zhang, Xiangwu PY - 2005/// SP - 1-11, ER - TY - CONF TI - The optimizing-simulator: Merging simulation and optimization using approximate dynamic programming AU - Powell, Warren B T2 - IEEE C2 - 2005/// C3 - Simulation Conference, 2005 Proceedings of the Winter DA - 2005/// SP - 14-pp ER - TY - JOUR TI - Improving predictability of simulation models using evolutionary computation-based methods for model error correction AU - Zechman, Emily Michelle DA - 2005/// PY - 2005/// ER - TY - CONF TI - Design of minimum entropy wavelet filters using genetic algorithms AU - Jasper, Warren J AU - Joines, Jeff T2 - International Society for Optics and Photonics C2 - 2005/// C3 - Wavelet Applications in Industrial Processing III DA - 2005/// VL - 6001 SP - 60010G ER - TY - JOUR TI - ASAP3: a batch means procedure for steady-state simulation analysis AU - Steiger, Natalie M. AU - Lada, Emily K. AU - Wilson, James R. AU - Joines, Jeffrey A. AU - Alexopoulos, Christos AU - Goldsman, David T2 - ACM Transactions on Modeling and Computer Simulation AB - We introduce ASAP3, a refinement of the batch means algorithms ASAP and ASAP2, that delivers point and confidence-interval estimators for the expected response of a steady-state simulation. ASAP3 is a sequential procedure designed to produce a confidence-interval estimator that satisfies user-specified requirements on absolute or relative precision as well as coverage probability. ASAP3 operates as follows: the batch size is progressively increased until the batch means pass the Shapiro-Wilk test for multivariate normality; and then ASAP3 fits a first-order autoregressive (AR(1)) time series model to the batch means. If necessary, the batch size is further increased until the autoregressive parameter in the AR(1) model does not significantly exceed 0.8. Next, ASAP3 computes the terms of an inverse Cornish-Fisher expansion for the classical batch means t -ratio based on the AR(1) parameter estimates; and finally ASAP3 delivers a correlation-adjusted confidence interval based on this expansion. Regarding not only conformance to the precision and coverage-probability requirements but also the mean and variance of the half-length of the delivered confidence interval, ASAP3 compared favorably to other batch means procedures (namely, ABATCH, ASAP, ASAP2, and LBATCH) in an extensive experimental performance evaluation. DA - 2005/1/1/ PY - 2005/1/1/ DO - 10.1145/1044322.1044325 VL - 15 IS - 1 SP - 39-73 ER - TY - BOOK TI - Proceedings of the 2005 Winter Simulation Conference A3 - Steiger, N.M. A3 - Kuhl, M.E. A3 - Joines, J.A. A3 - Armstrong, B. DA - 2005/// PY - 2005/// PB - Institute of Electrical and Electronics Engineers ER - TY - CONF TI - Utilizing Simple Spreadsheet Simulators to Develop a Finished Goods Inventory Model for an Apparel Company AU - Joines, J.A. AU - Martin, B. AU - Thoney, K. C2 - 2005/// C3 - Proceedings of the 3rd International Industrial Simulation Conference DA - 2005/// SP - 417–422 PB - Ghent: EUROSIS SN - 9789077381182 ER - TY - CONF TI - Electro-textiles: Challenges and opportunities AU - POURDEYHIMI, BEHNAM C2 - 2005/// C3 - IECON DA - 2005/// DO - 10.1109/iecon.2005.1568860 PB - Piscataway, N.J.: IEEE SN - 9780780392526 ER - TY - JOUR TI - Sample preparation for textile nanofiber composites AU - POURDEYHIMI, BEHNAM AU - Fedorova, N. AU - Garcia, R. AU - Knowlton, V. AU - Oldham, C. T2 - Microscopy Today AB - Abstract The increased emphasis on nano-structured materials is placing an ever increasing demand on sample preparation techniques to unveil such fine structure. Nano-structured fibers are even more difficult because of the ease with which these materials can smear even when prepared under liquid nitrogen (LN2) as shown (Figure 1). This is especially true for the islandin- the-sea structures where it is rather hard to reveal the island structures due to smearing. In the search for a possible solution, a sample preparation technique that has shown great results in other composite structures of different polymer blends was applied to these structures. DA - 2005/// PY - 2005/// DO - 10.1017/s1551929500051476 VL - 13 IS - 2 SP - 38–40 ER - TY - CONF TI - Graduated compression stockings (GCS): Effects of materials mechanical properties and structures on the skin pressure profiles AU - Liu, R. AU - Kwok, Y. L. AU - Li, Y. AU - Lao, T. T. AU - Zhang, X. C2 - 2005/// C3 - Intelligent ambience and well-being : Ambience 05, International Scientific Conference 19-20 September, 2005, Tampere, Finland ; proceedings DA - 2005/// SP - 4 PB - Tampere: Tampere University of Technology SN - 9789521514296 ER - TY - BOOK TI - Proceedings of the 2005 Winter Simulation Conference: Hilton at the Walt Disney World Resort, Orlando, Florida, U.S.A., Dec 4-7, 2005 AU - Steiger, N. M AU - Kuhl, M.E. AU - Joines, J. A. AU - Armstrong, B. DA - 2005/// PY - 2005/// PB - New York, N.Y.: Association for Computing Machinery SN - 9780780395190 ER - TY - CONF TI - The influence of number of segments on performance in splittable nonwovens AU - Pourdeyhimi, B. C2 - 2005/// DA - 2005/// ER - TY - CONF TI - Modeling: Pitfalls AU - Pourdeyhimi, B. AU - Chhabra, R. C2 - 2005/// DA - 2005/// ER - TY - CONF TI - Modeling fluid flow through nonwovens AU - Pourdeyhimi, B. AU - Maze, B. AU - Tafreshi, H. C2 - 2005/// DA - 2005/// ER - TY - CONF TI - Hydroentangling principles AU - Pourdeyhimi, B. AU - Tafreshi, H. AU - Anantharamaiah, N. C2 - 2005/// DA - 2005/// ER - TY - CONF TI - Aerosol filtration AU - Pourdeyhimi, B. AU - Tafreshi, H. C2 - 2005/// DA - 2005/// ER - TY - CONF TI - 2-D and 3-D simulations of nonwovens structures AU - Pourdeyhimi, B. AU - Maze, B. C2 - 2005/// DA - 2005/// ER - TY - CONF TI - Examination of the factors surrounding the implementation of niche market strategy AU - Parrish E.D., Cassill N.L. AU - W., Oxenham C2 - 2005/// C3 - A new era: National Textile Center Forum, March 20-22, 2005: Textile Institute, 84th Annual World Conference, March 22-25, 2005, Back-to-Back Meetings in Raleigh, North Carolina, USA DA - 2005/// SP - 1-14 PB - [Manchester, England]: The Textile Institute ER - TY - BOOK TI - Advances in fuel cells AU - Zhang, X. DA - 2005/// PY - 2005/// PB - Kerala, India: Research Signpost, SN - 9788130800264 ER - TY - CHAP TI - The creator of modern quality management - Dr. Joseph M. Juran's contributions, 1987-2000, Juran, quality, and a century of improvement AU - Godfrey, A.B. T2 - Juran, quality, and a century of improvement PY - 2005/// PB - Milwaukee, Wis.: ASQ Quality Press SN - 9780873896351 ER - TY - JOUR TI - Fabric defect detection using a GA trained wavelet filter AU - Jasper, W. AU - Joines, J. A. AU - Brezenvich, J. T2 - Journal of the Textile Institute AB - Abstract This paper presents a method to design a wavelet-filter that minimizes entropy in the wavelet transform of images of woven fabrics. Filters that minimize entropy in images tend to filter out fabric texture while highlighting fabric defects. The design of the wavelet filter is couched as a non-convex optimization problem which is solved using a hybridized Genetic Algorithm. Three distinct filters are tuned to detect horizontal, vertical and blob defects in woven fabrics. In addition to texture filtering, defect segmentation, noise removal, and object extraction are presented. The effects of shifting on the optimized set of coefficients is also explored. DA - 2005/// PY - 2005/// DO - 10.1533/joti.2004.0057 VL - 96 IS - 1 SP - 43–54 ER - TY - JOUR TI - Washfastness improvement for heavy shade microdenier nylon 6,6, fabric T2 - AATCC Review DA - 2005/// PY - 2005/// VL - 5 IS - 8 SP - 36-40 ER - TY - JOUR TI - Effect of yarn appearance on apparent quality of weft knitted fabrics AU - POURDEYHIMI, BEHNAM AU - Semnani, D. AU - Latifi, M. AU - Tehran, M. A. AU - Merati, A. A. T2 - Journal of the Textile Institute AB - Abstract This research has attempted to present a novel definition for apparent quality of weft knitted fabrics and their used yarns using the image analysis method and linear functions, which are calculated by neural networks. First, standard boards of yarn were analyzed using the image analysis method and artificial neural networks. Then, samples of plain, cross-miss and plain pique fabrics and their used yarns were tested for appearance. The results show that the correlation between apparent quality of knitted fabrics and their yarns is very strong. The ANOVA test confirmed that there is a strong influence of yarn type and fabric structure on fabric apparent quality. Although the yarn type has a strong effect on fabric appearance, the effect of fabric structure on its appearance is not remarkable. Other results show that the quality of the knitted fabric depends on the features of the raw materials and the effects of different knit elements. DA - 2005/// PY - 2005/// DO - 10.1533/joti.2005.0003 VL - 96 IS - 5 SP - 295–301 ER - TY - JOUR TI - Development of appearance grading method of cotton yarns for various types of yarns AU - POURDEYHIMI, BEHNAM AU - Semnani, D. AU - Latifi, M. AU - Tehran, M. A. AU - Merati, A. A. T2 - Research Journal of Textile & Apparel AB - In this research, a new method is developed for grading various types of yarn for appearance using image analysis and an artificial neural network. The images of standard yarn boards were analyzed by image analysis and four different faults factors were defined and measured for each series of yarn counts. For each series of yarn counts, a neural network with one layer was trained by measured fault factors of standard boards. The trained neural networks were used for grading various types of yarns. The yarns were also graded by the conventional standard method. The results of grading various types of yarns by image analysis and conventional standard method are compared. We found a strong correlation between the results of grading by two methods. Whereas, in the image analysis method, the grading procedure is not dependent on yarn structure and raw materials, we concluded that it is possible to use this method for grading of any types of yarns based on their apparent features. DA - 2005/// PY - 2005/// DO - 10.1108/rjta-09-04-2005-b009 VL - 9 IS - 4 SP - 886–893 ER - TY - JOUR TI - UV curing for encapsulated aroma finish on cotton AU - Li, S. Boyter AU - H. AU - Qian, L. T2 - Journal of the Textile Institute DA - 2005/// PY - 2005/// VL - 96 IS - 6 SP - 407-411 ER - TY - JOUR TI - The use of niche market strategy by US textile and apparel firms AU - Parrish E. D., Cassill N. L. AU - Oxenham W., AU - Jones M. R., T2 - Journal of the Textile Institute AB - Abstract The purpose of this study was to examine how a niche market strategy can be used by the United States textile and apparel industry to compete with lower priced imports. A quantitative study was conducted in Spring 2003 that utilized an online survey, based on a deductive model of research (Creswell, 2003). Results showed that the majority of companies surveyed are currently using a niche market strategy. However, the company's approach to the strategy varied among industry sectors. Also, the variables that need to be in place for this strategy to be successful were discovered, in addition to the various methodologies that can be used to identify potential niche markets. The research results can be used in business strategy formulation to create and maintain niche markets as well as to provide a research framework for international textile and apparel researchers. DA - 2005/// PY - 2005/// DO - 10.1533/joti.2004.0027 VL - 96 IS - 2 SP - 77-85 ER - TY - JOUR TI - Competitive pricing strategies AU - Fratto, G. AU - Jones, M. R. AU - Cassill, N. L. T2 - Journal of Fashion Marketing and Management DA - 2005/// PY - 2005/// VL - 9 ER - TY - JOUR TI - Branding to compete: Applications to textiles and apparel AU - Bruer, S. M AU - Cassill, N. L. AU - Jones, M. R. T2 - Journal of Textile and Apparel Technology and Management DA - 2005/// PY - 2005/// VL - 4 IS - 3 ER - TY - JOUR TI - Solvent-free composite PEO-ceramic fiber/mat electrolytes for lithium secondary cells AU - Wang, CS AU - Zhang, XW AU - Appleby, AJ T2 - JOURNAL OF THE ELECTROCHEMICAL SOCIETY AB - Solvent-free composite poly(ethylene oxide) (PEO)-ceramic fiber or mat electrolytes with high ionic conductivity and good interfacial stability have been developed using high-ionic-conductivity fibers and mats. The conducting ceramic fibers can penetrate the cross section of the electrolyte film to provide long-range lithium-ion transfer channels, thus producing composite electrolytes with high conductivity. In this work, a maximum room-temperature conductivity of S cm−1 was achieved for 20 wt % fiber in a PEO- mixture containing 12.5 wt % in PEO. The maximum transference number obtained was 0.7. The ceramic fibers in this composite electrolyte are coated by a very thin PEO layer, which is sufficient to provide good interfacial stability with lithium-ion and lithium-metal anodes. © 2004 The Electrochemical Society. All rights reserved. DA - 2005/// PY - 2005/// DO - 10.1149/1.1828952 VL - 152 IS - 1 SP - A205-A209 SN - 0013-4651 UR - https://publons.com/publon/7178371/ ER - TY - JOUR TI - Impedance spectra of carbon black filled high-density polyethylene composites AU - Wang, YJ AU - Pan, Y AU - Zhang, XW AU - Tan, K T2 - JOURNAL OF APPLIED POLYMER SCIENCE AB - Abstract Carbon black (CB) filled high‐density polyethylene (HDPE) composites are prepared by ordinary blending for use as an electrical conductive polymer composite. The composite changes from an electrical insulator to a conductor as the CB content is increased from 10 to 20 wt %, which is called the percolation region. For explanatory purposes, three models, namely, “conduction via nonohmic contacting chain,” “conduction via ohmic contacting chain,” and a mixture of them corresponding to the conductions in the percolation region, high CB loading region, and limiting high CB loading are proposed by the reasonable configurations of aggregate resistance, contact resistance, gap capacitance, and joining aggregates induction. The characters of the impedance spectra based on the three models are theoretically analyzed. In order to find some link between the electrical conductivity and the CB dispersion manner in the composites, the impedance spectra of three samples, HDPE/15 wt % CB (the center of the percolation region), HDPE/25 wt % CB (a typical point in the high CB loading region), and HDPE/19 wt % CB (the limiting high CB loading region), are measured by plotting the impedance modulus and phase angle against the frequency and by drawing the Cole–Cole circle of the imaginary part and real part of the impedance modulus of each sample. The modeled approached spectra and the spectra measured on the three samples are compared and the following results are found: the measured impedance spectrum of HDPE/15 wt % CB (percolation region) is quite close to the model of conduction via nonohmic contacting chain. The character of the measured spectrum of HDPE/25 wt % CB consists of the form of the model of conduction via ohmic contacting chain. The impedance behavior of HDPE/19 wt % CB exhibits a mixture of the two models. From the comparisons, it is concluded that the electrical conducting network in the percolation region of the CB filled HDPE composite is composed of aggregate resistance, nonohmic contact resistance, and gap capacitance, and that of the high CB loading region consists of continuously joined CB aggregate chains, which are possibly wound and assume helix‐like (not straight lines) conductive chains, acting as electrical inductions as the current passes through. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 98: 1344–1350, 2005 DA - 2005/11/5/ PY - 2005/11/5/ DO - 10.1002/app.22297 VL - 98 IS - 3 SP - 1344-1350 SN - 1097-4628 UR - https://publons.com/publon/7178385/ KW - composites KW - polyethylene KW - modulus KW - chain ER - TY - PAT TI - Sock for detection of pressure points on feet AU - Horton, J. M. AU - Hinks, D. AU - El-Shafei, A. C2 - 2005/// DA - 2005/// PY - 2005/// ER - TY - CONF TI - Towards global color control in the textile supply chain: The role of lighting in color perception AU - Hinks, D. AU - Noor, K. AU - Shamey, R. AU - Cardenas, L. AU - Jasper, W. AU - Cassill, N. AU - Aspland, J. R. C2 - 2005/// C3 - American Association of Textile Chemists and Colorists, International Conference & Exhibition (AATCC-ICE) 2005 DA - 2005/// SP - 14-23 PB - American Association of Textile Chemists and Colorists ER - TY - JOUR TI - A note on jet streaks in hydroentangled nonwovens AU - Shim, E AU - Pourdeyhimi, B T2 - TEXTILE RESEARCH JOURNAL AB - Hydroentanglement is the fastest growing bonding method in the nonwoven arena. Its strengths are good fabric aesthetics, and the lack of any complex binder chemistry with its inherent environmental concerns. Hydroentanglement is used for mechanically bonding both staple and filament nonwovens as well as being used for post-treatment of fabrics. As hydroentangling uses fine, closely spaced, high-speed waterjets, they create ridges or streaks that are quite visible to the naked eye. This may be undesirable if it interferes with other textures on the surface or if a smooth flat surface is desired. This study reports on methodology used for the analysis of jet streaks using texture-based methods. DA - 2005/7// PY - 2005/7// DO - 10.1177/0040517505053955 VL - 75 IS - 7 SP - 569-577 SN - 0040-5175 ER - TY - JOUR TI - Conformational changes induced in Bombyx mori silk fibroin by cyclodextrin inclusion complexation AU - Rusa, CC AU - Bridges, C AU - Ha, SW AU - Tonelli, AE T2 - MACROMOLECULES AB - We have previously demonstrated that the formation of and coalescence from polymer−cyclodextrin (CD) inclusion compounds (ICs) represents a very useful approach to modify the chain conformations and improve the crystallinity of various bulk polymers. The present work deals, for the first time, with the formation of a γ-CD IC with a natural protein as guest, i.e., silk fibroin from Bombyx mori silkworm. Formation of the crystalline inclusion compound was verified by wide-angle X-ray diffraction, solid-state NMR, and infrared spectroscopy to have the host γ-CD molecules arranged in a channel structure, with the isolated silk chains included, at least in large part, in their internal cavities. Removing the γ-CD host lattice by washing with hot water produced a white coalesced silk sample that was collected and characterized. Unlike the original or precipitated silk fibroin, the coalesced sample shows most of its protein residues in a β-sheet conformation with an elevated degree of crystallinity. DA - 2005/6/28/ PY - 2005/6/28/ DO - 10.1021/ma050340a VL - 38 IS - 13 SP - 5640-5646 SN - 1520-5835 ER - TY - JOUR TI - Structural study of irregular amino acid sequences in the heavy chain of Bombyx mori silk fibroin AU - Ha, SW AU - Gracz, HS AU - Tonelli, AE AU - Hudson, SM T2 - BIOMACROMOLECULES AB - Recently, genetic studies have revealed the entire amino acid sequence of Bombyx mori silk fibroin. It is known from X-ray diffraction studies that the β-sheet crystalline structure (silk II) of fibroin is composed of hexaamino acid sequences of GAGAGS. However, in the heavy chain of B. mori silk fibroin, there are also present 11 irregular sequences, with about 31 amino acid residues (irregular GT∼GT sequences). The structure and role of these irregular sequences have remained unknown. One of the most frequently appearing irregular sequences was synthesized and its 3-D solution structure was studied by high-resolution 2-D NMR techniques. The 3-D structure determined for this peptide shows that it makes a loop structure (distorted Ω shape), which implies that the preceding backbone direction is changed by 180°, i.e., reversed, by this sequence. This may facilitate the β-sheet formation between the crystal-forming building blocks, GAGAGS/GY∼GY sequences, in the fibroin heavy chain. DA - 2005/// PY - 2005/// DO - 10.1021/bm050294m VL - 6 IS - 5 SP - 2563-2569 SN - 1526-4602 ER - TY - JOUR TI - Durable and regenerable antimicrobial textiles: Chlorine transfer among halamine structures AU - Qian, L AU - Sun, G T2 - INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH AB - An intermolecular chlorine transfer reaction has been considered as a possible cause for improved durability and power of biocidal functions on cotton fabrics containing a mixture of amine, amide, and imide halamine structures. To prove the chlorine transfer reaction, model compounds of amine halamine and imide were employed. The results indicated that the chlorine transfer reaction from stable amine halamine to imide and the formation of an active imide halamine occurred in both water and chloroform solutions. The transfer is a second-order reaction related to the concentrations of both amine halamine and imide bonds but is more significantly affected by the concentration of amine bonds. The reaction is endothermic, and the rate is very slow, on the order of 10-4−10-5 mmol/min in both water and chloroform. DA - 2005/2/16/ PY - 2005/2/16/ DO - 10.1021/ie049493x VL - 44 IS - 4 SP - 852-856 SN - 0888-5885 ER - TY - JOUR TI - Washfastness improvement for heavy shade microdenier nylon 6,6 fabric AU - Li, S. Q. AU - Boyter, H. T2 - AATCC Review DA - 2005/// PY - 2005/// VL - 5 IS - 8 SP - 36-40 ER - TY - JOUR TI - Ionic transport and interfacial stability of sulfonate-modified fumed silicas as nanocomposite electrolytes AU - Zhang, XW AU - Fedkiw, PS T2 - JOURNAL OF THE ELECTROCHEMICAL SOCIETY AB - Degussa A200 and R711 fumed silica surfaces were modified by attaching lithium sulfonate groups through alkyl or oligomer chains, respectively, in an attempt to form single-ion conducting fumed silicas: A200-lithium propanesulfonate (A200-LiPS), R711-poly(lithium vinylsulfonate) (R711-pLiVS), and R711-poly(lithium 2-acrylamido-2-methyl-1-propanesulfonate) (R711-pLiAMPS). Conductivity, lithium transference number, and Li/electrolyte interfacial stability measurements were conducted on nanocomposite electrolytes prepared by dispersing the conducting fumed silicas into solvents consisting of oligomeric polyethylene glycol dimethyl ether (PEGdm), polyethylene oxide (PEO), or PEGdm/PEO blends. Among the three sulfonate-modified fumed silicas, the highest conductivity was always obtained using R711-pLiAMPS. A maximum room-temperature conductivity of was obtained at a surface concentration of and a Li:O mole ratio of 1:100 ( filler). The maximum lithium transference number achieved for the same R711-pLiAMPS-based system is 0.78 at a surface concentration of and a Li:O mole ration of 1:20 ( filler). Adding lithium salts to the solvent, such as lithium bis(trifluoromethylsulfonyl)imide (LiTFSI), lithium bis(perfluoroethylenesulfonyl)imide (LiBETI), lithium bis(oxalato)borate (LiBOB), and lithium phosphate , increases room-temperature conductivity and interfacial stability while maintaining relatively high lithium transference numbers. DA - 2005/// PY - 2005/// DO - 10.1149/1.2109661 VL - 152 IS - 12 SP - A2413-A2420 SN - 1945-7111 UR - https://publons.com/publon/7178384/ ER - TY - JOUR TI - Effect of dilation on the mechanical characterization of vascular prostheses AU - Ulcay, Y AU - Pourdeyhimi, B T2 - FIBERS AND POLYMERS DA - 2005/3// PY - 2005/3// DO - 10.1007/BF02875573 VL - 6 IS - 1 SP - 49-54 SN - 1875-0052 KW - vascular grafts KW - creep KW - compliance KW - in vitro test ER - TY - JOUR TI - Bleaching of cotton with activated peroxide systems AU - Lim, S. H. AU - Lee, J. J. AU - Hinks, D. AU - Hauser, P. T2 - Coloration Technology AB - The bleaching performance of a novel cationic bleach activator, N ‐[4‐(triethylammoniomethyl)benzoyl]‐caprolactam chloride, was compared to that of nonanoyloxybenzene sulphonate, a commercially available anionic bleach activator. The whiteness of bleached cotton fabric was used as a measure of the performance. Comparison of bleach performance and the effect of key variables were evaluated using a central composite experimental design. The performances of both activators increased with temperature and sodium hydroxide concentration. Also, the performance of the cationic bleach activator increased with activator concentration, while an increase in the concentration of nonanoyloxybenzene sulphonate gave an adverse effect on the performance. It was found that the cationic bleach activator was superior to the anionic activator in the hot bleaching of cotton under the conditions studied. DA - 2005/// PY - 2005/// DO - 10.1111/j.1478-4408.2005.tb00258.x VL - 121 IS - 2 SP - 89-95 ER - TY - JOUR TI - Stability of a novel cationic bleach activator in aqueous solution AU - Lee, J. J. AU - Lim, S. H. AU - Hauser, P. AU - Hinks, D. T2 - Coloration Technology AB - The hydrolytic stability of a novel cationic bleach activator, N-[4-(triethylammoniomethyl)benzoyl]capro-lactam chloride, in aqueous solution has been investigated. After treatment with a bleach system, the whiteness of cotton fabric was measured. Assessment of the available oxygen was used to assess the stability of the bleach activator in solution with respect to time, using a method which minimised the effect of hydrogen peroxide on total available oxygen. Whereas the N-[4-(triethylammoniomethyl)benz-oyl]caprolactam chloride in solid form was found to be stable, in aqueous solution it was relatively easily hydrolysed. The effect of pH on its stability in solution was assessed. A good correlation was found between change in available oxygen on storage and bleaching performance. DA - 2005/// PY - 2005/// DO - 10.1111/j.1478-4408.2005.tb00246.x VL - 121 IS - 1 SP - 37-40 ER - TY - PAT TI - Methods and systems for selectively connecting and disconnecting conductors in a fabric AU - Dhawan, A. AU - Ghosh, T. K. AU - Muth, J. AU - Seyam, A. C2 - 2005/// DA - 2005/// PY - 2005/// ER - TY - JOUR TI - Structural studies of Bombyx mori silk fibroin during regeneration from solutions and wet fiber spinning AU - Ha, SW AU - Tonelli, AE AU - Hudson, SM T2 - BIOMACROMOLECULES AB - Regenerated silk fibroin materials show properties dependent on the methods used to process them. The molecular structures of B. mori silk fibroin both in solution and in solid states were studied and compared using X-ray diffraction, FTIR, and (13)C NMR spectroscopy. Some portion of fibroin protein molecules dissolved in formic acid already have a beta-sheet structure, whereas those dissolved in TFA have some helical conformation. Moreover, fibroin molecules were spontaneously assembled into an ordered structure as the acidic solvents were removed from the fibroin-acidic solvent systems. This may be responsible for the improved physical properties of regenerated fibroin materials from acidic solvents. Regenerated fibroin materials have shown poor mechanical properties and brittleness compared to their original form. These problems were technically solved by improving the fiber forming process according to a method reported here. The regenerated fibroin fibers showed much better mechanical properties compared to the native silk fiber and their physical and chemical properties were characterized by X-ray diffraction, solid state (13)C NMR spectroscopy, SinTech tensile testing, and SEM. DA - 2005/// PY - 2005/// DO - 10.1021/bm050010y VL - 6 IS - 3 SP - 1722-1731 SN - 1526-4602 ER -