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SAMPE Long Beach 2016 Conference and Exhibition

作者： Wu, Hao Krifa, Mourad Koo, Joseph H. Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin 200 W 24th St. A2700 AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States

ISBN: (纸本)9781934551233

Previous studies on injection molded samples have yielded non-drip flame retardant nylon 6 nanocomposite through the infusion of nanoclay and non-halogenated intumescent particles (FR) via co-rotating twin-screw extrusion. In addition, rubber toughening was found to be an effective approach to recovering the loss of ductility of the nanocomposite formulations while preserving the non-drip FR performance of the bulk material. This study aims to transfer the knowledge from injection molded bulk samples to melt spun fibers. Thus, non-drip flame retardant nylon 6 nanocomposite fibers were processed by melt spinning. Melt viscosity, fiber morphology, microstructure and flammability properties are discussed in this report. Copyright 2016. Used by the Society of the Advancement of Material and Process engineering with permission.

关键词： Melt spinning

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Electrochemical performance of electrospun α-Fe2O3/C nanofibers as anodes for lithium-ion batteries

Electrochemical performance of electrospun α-Fe2O3/C nanofi...

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Fiber Society 2015 Fall Meeting and Technical Conference - Fibers: Where Tradition Meets Innovation

作者： Zhu, Jiadeng Lu, Yao Chen, Chen Jasper, Samuel Zhang, Xiangwu Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University RaleighNC27695-8301 United States

Hematite iron oxide (α-Fe2O3) has received much attention for use as anode material in lithium-ion batteries not only due to its high theoretical capacity but also to its nontoxicity and low cost. However, its practical applications are limited by its low electrical conductivity as well as the large volume change during Li ion insertion/extraction process. Carbon coated α-Fe2O3 nanofibers were prepared via electrospinning followed by a thermal treatment process in this work, which were used as anode material for lithium-ion batteries. A high reversible capacity of 842 mAh g-1 at a current density of 50 mA g-1 at the 50th cycle was achieved for α-Fe2O3/C nanofibers containing 12.5 wt% carbon. Such excellent electrochemical performance could be attributed to their unique fabric structure and the conductive carbon coating which could shorten Li ion transport distance, improving Li ion reversibility and kinetic properties.

关键词： Nanofibers

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Body appreciation around the world: Measurement invariance of the Body Appreciation Scale-2 (BAS-2) across 65 nations, 40 languages, gender identities, and age

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Body image 2023年 46卷 449-466页

作者： Viren Swami Ulrich S Tran Stefan Stieger Toivo Aavik Hamed Abdollahpour Ranjbar Sulaiman Olanrewaju Adebayo Reza Afhami Oli Ahmed Annie Aimé Marwan Akel Hussam Al Halbusi George Alexias Khawla F Ali Nursel Alp-Dal Anas B Alsalhani Sara Álvares-Solas Ana Carolina Soares Amaral Sonny Andrianto Trefor Aspden Marios Argyrides John Jamir Benzon R Aruta Stephen Atkin Olusola Ayandele Migle Baceviciene Radvan Bahbouh Andrea Ballesio David Barron Ashleigh Bellard Sóley Sesselja Bender Kerime Derya Beydağ Gorana Birovljević Marie-Ève Blackburn Teresita Borja-Alvarez Joanna Borowiec Miroslava Bozogáňová Solfrid Bratland-Sanda Matthew H E M Browning Anna Brytek-Matera Marina Burakova Yeliz Çakır-Koçak Pablo Camacho Vittorio Emanuele Camilleri Valentina Cazzato Silvia Cerea Apitchaya Chaiwutikornwanich Trawin Chaleeraktrakoon Tim Chambers Qing-Wei Chen Xin Chen Chin-Lung Chien Phatthanakit Chobthamkit Bovornpot Choompunuch Emilio J Compte Jennifer Corrigan Getrude Cosmas Richard G Cowden Kamila Czepczor-Bernat Marcin Czub Wanderson Roberto da Silva Mahboubeh Dadfar Simon E Dalley Lionel Dany Jesus Alfonso D Datu Pedro Henrique Berbert de Carvalho Gabriel Lins de Holanda Coelho Avila Odia S De Jesus Sonia Harzallah Debbabi Sandesh Dhakal Francesca Di Bernardo Donka D Dimitrova Jacinthe Dion Barnaby Dixson Stacey M Donofrio Marius Drysch Hongfei Du Angel M Dzhambov Claire El-Jor Violeta Enea Mehmet Eskin Farinaz Farbod Lorleen Farrugia Leonie Fian Maryanne L Fisher Michał Folwarczny David A Frederick Matthew Fuller-Tyszkiewicz Adrian Furnham Antonio Alías García Shulamit Geller Marta Ghisi Alireza Ghorbani Maria Angeles Gomez Martinez Sarah Gradidge Sylvie Graf Caterina Grano Gyöngyvér Gyene Souheil Hallit Motasem Hamdan Jonathan E Handelzalts Paul H P Hanel Steven R Hawks Issa Hekmati Mai Helmy Tetiana Hill Farah Hina Geraldine Holenweger Martina Hřebíčková Olasupo Augustine Ijabadeniyi Asma Imam Başak İnce Natalia Irrazabal Rasa Jankauskiene Ding-Yu Jiang Micaela Jiménez-Borja Verónica Jiménez-Borja Evan M Johnson Veljko Jov School of Psychology and Sport Science Anglia Ruskin University Cambridge United Kingdom Centre for Psychological Medicine Perdana University Kuala Lumpur Malaysia. Electronic address: viren.swami@aru.ac.uk. Department of Cognition Emotion and Methods in Psychology Faculty of Psychology University of Vienna Vienna Austria. Department of Psychology and Psychodynamics Karl Landsteiner University of Health Sciences Krems an der Donau Austria. Institute of Psychology University of Tartu Tartu Estonia. Department of Psychology Koç University Istanbul Turkiye. Department of Psychology and Behavioural Studies Ekiti State University Ado-Ekiti Nigeria. Department of Art Studies Tarbiat Modares University Tehran Iran. Department of Psychology University of Chittagong Chattogram Bangladesh. Department of Psychoeducation and Psychology Université du Québec en Outaouais Saint-Jérôme Canada. INSPECT-LB: National Institute of Public Health Clinical Epidemiology and Toxicology Beirut Lebanon School of Pharmacy Lebanese International University Beirut Lebanon. Department of Management Ahmed Bin Mohammad Military College Doha Qatar. Faculty of Psychology Panteion University of Social and Political Sciences Athens Greece. Royal College of Surgeons Ireland-Bahrain Adliya Bahrain. Department of Midwifery Faculty of Health Sciences Munzur University Tunceli Turkiya. Department of Oral Medicine and Diagnostic Sciences Vision College of Dentistry and Nursing Vision Colleges Riyadh Saudi Arabia. Facultad de Ciencias de la Vida Universidad Regional Amazónica Ikiam Muyuna Ecuador. Federal Institute of Education Science and Technology of Southeast Minas Gerais Barbacena Brazil. Department of Psychology Universitas Islam Indonesia Yogyakarta Indonesia. Department of Psychology Aberystwyth University Ceredigion United Kingdom. Department of Psychology Neapolis University Pafos Paphos Cyprus. Department of Psychology De La Salle University Phillippines. Department of Gen

The Body Appreciation Scale-2 (BAS-2) is a widely used measure of a core facet of the positive body image construct. However, extant research concerning measurement invariance of the BAS-2 across a large number of nations remains limited. Here, we utilised the Body Image in Nature (BINS) dataset - with data collected between 2020 and 2022 - to assess measurement invariance of the BAS-2 across 65 nations, 40 languages, gender identities, and age groups. Multi-group confirmatory factor analysis indicated that full scalar invariance was upheld across all nations, languages, gender identities, and age groups, suggesting that the unidimensional BAS-2 model has widespread applicability. There were large differences across nations and languages in latent body appreciation, while differences across gender identities and age groups were negligible-to-small. Additionally, greater body appreciation was significantly associated with higher life satisfaction, being single (versus being married or in a committed relationship), and greater rurality (versus urbanicity). Across a subset of nations where nation-level data were available, greater body appreciation was also significantly associated with greater cultural distance from the United States and greater relative income inequality. These findings suggest that the BAS-2 likely captures a near-universal conceptualisation of the body appreciation construct, which should facilitate further cross-cultural research.

关键词： Body appreciation Body appreciation Scale-2 (BAS-2) Cross-cultural Measurement invariance Multi-group confirmatory factor analysis (MG-CFA) Psychometrics Structural analysis

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Preparation of a graphene-loaded carbon nanofiber composite with enhanced graphitization and conductivity for biosensing applications

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RSC Advances 2015年第39期5卷 30602-30609页

作者： Li, Dawei Li, Guohui Lv, Pengfei Ullah, Naseeb Wang, Cheng Wang, Qingqing Zhang, Xiangwu Wei, Qufu Key Laboratory of Eco-Textiles Ministry of Education Jiangnan University Wuxi Jiangsu214122 China Fiber and Polymer Science Program Department of Textile EngineeringChemistry and Science North Carolina State University RaleighNC27695-8301 United States

A combined method of electrostatic adsorption and green reduction was successfully employed to synthesize graphene-loaded carbon nanofibers (G/CNFs). The graphene nanoflakes enhanced the degree of graphitization of CNFs. A mixture containing laccase (Lac), G/CNFs and Nafion was used to fabricate a novel biosensor. The G/CNFs facilitated the direct electron transfer between Lac and the modified electrode. A pair of apparently enhanced redox peaks was observed on the modified electrode. The biosensor was investigated using square wave voltammetry, and the biosensor displayed highly efficient electrocatalysis towards catechol with a detection limit of 20 nM (S/N = 3), a sensitivity of 13.5 μA μM-1, and a linear range from 1 × 10-7 to 2.86 × 10-6 M. Moreover, this new biosensor also showed good stability and selectivity, and was employed in measuring catechol concentration in a real water environment successfully. © 2015 The Royal Society of Chemistry.

关键词： Carbon nanofibers

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Photo-aging of modified PET-based model compounds

Photo-aging of modified PET-based model compounds

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Fiber Society 2015 Fall Meeting and Technical Conference - Fibers: Where Tradition Meets Innovation

作者： Cheema, Hammad Yildrim, Erol Arangdad, Kiarash Burk, Christopher Cleven, Curt Detwiler, Andrew Shamey, Renzo Pasquinelli, Melissa Freeman, Harold El-Shafei, Ahmed Textile Engineering Chemistry and Science Program College of Textiles North Carolina State University RaleighNC United States Eastman Chemical Company KingsportTN United States

Photosensitized reactivity and oxidations are important components of polymer weathering which are greatly influenced by the nature of excited polymer chromophores and the environment. Studying model compounds (MCs) representing the bulk of macromolecular systems is an efficient approach to understanding the inherent photophysical and chemical reactivity both practically and theoretically. In this work, MCs representing the class of cyclohexane dimethanol (CHDM) and isophthalic acid modified polyethylene terephthalate polymers have been studied to better understand the bulk weathering properties of these materials. Singlet oxygen sensitization measurements clearly show more than two fold higher 1275nm emission intensity signal for terephthalic acid based MCs compared to iso-phthalic acid based MCs with similar optical density, thus making the terephthalic acid derivatives more prone to photo-hydroperoxidation caused by singlet oxygen. Time resolved studies have provided further proof for the higher reactivity of terephthalic acid based MCs compared to iso-phthalic acid based MCs, mainly due to the dominant triplet state photophysics. Molecular modelling was also employed to predict the possible reactive sites on the MCs.

关键词： Polyethylene terephthalates

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The effects of QAC-silane antimicrobial agents on the physical, mechanical, and thermophysiological properties of novel elastomeric fabrics for burn pressure garments

The effects of QAC-silane antimicrobial agents on the physic...

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Fiber Society 2015 Fall Meeting and Technical Conference - Fibers: Where Tradition Meets Innovation

作者： Varan, Nilufer Y. Caydamli, Yavuz Hudson, Sam M. Spontak, Richard J. Tonelli, Alan E. Engineering Faculty Department of Textile Engineering Pamukkale University Kinikli Kampusu Denizli20017 Turkey Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University College of Textiles Campus Box 8301 RaleighNC27695 United States Department of Chemical and Biomolecular Engineering North Carolina State University Engineering Building I Campus Box 7905 RaleighNC27695 United States

In this study, novel nylon/spandex elastomeric burn pressure garments were developed with a durable antimicrobial performance using silane and quaternary ammonium compounds (QAC's). A series of physical, mechanical and thermophysiological properties were tested before and after the application of the antimicrobial finish, including air permeability, stiffness, drapeability, bursting strength and extensibility, thermal resistance (Rct) and thermal insulation (in clo units). Antimicrobial tests were performed after 50 washing cycles using AATCC 100 Test Method, and they showed a 99% reduction in bacterial activity for those fabrics treated with the QAC-Silane antimicrobial agents. Physical, mechanical and thermophysiological properties were tested after antimicrobial treatments. A small significant increase was observed in terms of thermal resistance (Rct) (Tog) and isolation (It) (clo) properties for treated fabrics samples. The air permeability, bursting strength and drapeability showed a small significant decrease after antimicrobial finishing, while the elastomeric fabric showed a small but significant increase for fabric stiffness. These results confirm that when these novel pressure garments are used by burn patients, they will not only decrease the incidence of infection but will also provide comfort during prolonged use.

关键词： Antimicrobial agents

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Critical Review—Narrow-Band Emission of Nitride Phosphors for Light-Emitting Diodes: Perspectives and Opportunities

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ECS Journal of Solid State Science and Technology 2017年第1期7卷

作者： Julius L. Leaño Jr. Mu-Huai Fang Ru-Shi Liu Department of Chemistry National Taiwan University Taipei 106 Taiwan Nanoscience and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Taipei 106 Taiwan Philippine Textile Research Institute Department of Science and Technology Taguig City 1631 Philippines Department of Mechanical Engineering and Graduate Institute of Manufacturing Technology National Taipei University of Technology Taipei 106 Taiwan E-mail: rsliu@ntu.edu.tw This paper is a Critical Review in Electrochemical and Solid State Science and Technology (CRES3T). This article was reviewed by Anant Setlur (setlur@***) and Jing Wang (ceswj@***).This paper is part of the JSS Focus Issue on Visible and Infrared Phosphor Research and Applications.

Searching for narrow-band red-emitting and thermally stable phosphors is the ultimate strategy toward enhanced performance of phosphor converted light emitting diodes (pc-LED). The red emission is assured by the nitride host because of its relatively more covalent character than oxides and sulfides; however, the narrow emission is attributed to crystallographic, morphological, and electronic considerations. The symmetric coordination site ensures equal ligand effect in all direction fits well with the configuration of Eu2+ f orbitals in the excited state, as observed in cuboid nitrides. Further, thermal stability is ascribed not only to suitable bandgap but more specifically, a relatively distant location of the lowest 5d level from the bottom of the conduction band (CB) that consequently entails high energy to quench excited electrons by exciting them further up to the CB. Modes toward the development of new nitride hosts with potentially narrow-band emission have been identified. A viewpoint on light-emitting diode (LED), backlighting, and laser lighting, which remains the most economically-rewarding phosphors application, is presented. Other exciting frontiers, such as agricultural illumination and persistent luminescence, maximize nitride systems that have other properties other than the stringent narrow-band red emission and excellent thermal stability required for the desired improvement of the mainstream LED application.

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Nanofiber-Based Membrane Separators for Lithium-ion Batteries

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MRS Online Proceedings Library (OPL) 2015年第1期1718卷 157-161页

作者： Mataz Alcoutlabi Hun Lee Xiangwu Zhang Department of Mechanical Engineering University of Texas-Pan American Edinburg TX 78539 USA. Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC 27695-8301 USA

Nanofiber-based membranes were prepared by two different methods for use as separators for Lithium-ion batteries (LIBs). In the first method, Electrospinning was used for the fabrication of Polyvinylidene fluoride PVDF nanofiber coatings on polyolefin microporous membrane separators to improve their electrolyte uptake and electrochemical performance. The nanofiber-coated membrane separators show better electrolyte uptake and ionic conductivity than that for the uncoated membranes. In the second method, Forcespinning® (FS) was used to fabricate fibrous cellulose membranes as separators for LIBs. The cellulose fibrous membranes were made by the Forcespinning® of a cellulose acetate solution precursor followed by a subsequent alkaline hydrolysis treatment. The results show that the fibrous cellulose membrane-based separator exhibits high electrolyte uptake and good electrolyte/electrode wettability and therefore can be a good candidate for high performance and high safety LIB separators.

关键词： polymer energy storage nanostructure

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Study on the Increase of Comfort in Ten Fashion Summer Tops Made of Four Kinds of textiles

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Research Journal of textile and Apparel 2014年第2期18卷 56-64页

作者： Chang, Yi-Ching Lee, Kuei-Chi Miao, Mei-Fen Yu, Huei-Jen Department of Fashion Design Shih Chien University Taiwan Department of Textile Engineering Chinese Culture University Taiwan Department of Textile Engineering Chinese Culture University China Department of Chemical and Materials Engineering and Master Program of Nanomaterials Chinese Culture University China

In response to the increasing demands for energy saving and carbon reduction under current global trends, we apply 10 fashion summer tops from Paris and New York made of cotton and CVC fabrics, fabric that has moisture transferring and sweat expulsion abilities, and fabric with moisture transferring and sweat expulsion properties that also imparts a cooling sensation in this study. Furthermore, by analyzing the activity of sympathetic and parasympathetic nerves which are measured by a heartbeat variability analyzer, we have obtained the relative comfort results in both the dynamic and static modes while the tested subject is wearing garments made from the 4 types of fabrics. We have tried to bring out the relationship between summer fashion style, fabric type and comfort. The test results indicate that the fabric with moisture transferring and sweat expulsion abilities can greatly increase the comfort of the garment and the comfort will be further increased if the fabric adds nano mineral-powder that imparts a cooling sensation for further moisture transferring and sweat expulsion. Finally, less coverage and stress on the top part (neck, shoulders and upper back) of the human body can reduce induced pressure and increase the relative comfort. © 2014 Emerald Group Publishing Limited.

关键词： Comfort Cooling Sensation Moisture Transfer Sympathetic Nerves

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Rubber toughening of flame retardant polyamide 6 nanocomposite systems 2

Rubber toughening of flame retardant polyamide 6 nanocomposi...

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2nd Annual Composites and Advanced Materials Expo, CAMX 2015

作者： Wu, Hao Krifa, Mourad Koo, Joseph H. Materials Science and Engineering Program Texas Materials Institute University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States School of Human Ecology-Textile and Apparel Technology University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States Department of Mechanical Engineering University of Texas at Austin 204 E. Dean Keeton St. C2200 AustinTX78712 United States

Previous studies indicate that although flame-retardant modified polyamide 6 shows effective reduction in heat release capacity, it suffers significant loss in ductility. In this study, elastomer toughening is explored as a means of recovering ductility of polyamide 6/ intumescent flame retardant composite systems. This was achieved using a maleic anhydride modified SBR elastomer incorporated into the system by melt blending. MCC Flammability tests show that the blends with elastomers exhibit slightly improved flame retardant properties compared to the original polyamide 6/intumescent flame retardant system however the UL-94 rating of elastomer toughened samples were only rated as V-1. Therfore nanoclay was introduced as a fourth component to perform as a synergistic additive to the intumescent flame retardants. With small amount (5wt.%) of nanoclay, a UL-94 V-0 rating was achieved with even lower flame retardant concentreation (15wt.% flame retardant and 10wt.% elastomer). Tensile tests show that the incorporation of flame retardant additives and elastomers degrade the tensile strength compared to neat polyamide 6. On the other hand, the addition of flame retardant enhanced the tensile modulus, while the addition of elastomers succeeded in partially recovering the lost elongation at break. Copyright 2015 by Hao Wu. Published by CAMX-The Composites and Advanced Materials Expo with permission.

关键词： Flame retardants

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