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1st World Conference on Advanced Materials for Defense, AUXDEFENSE 2018

作者： Bessa, Poincyana S. Ladchumanandasivan, Rasiah Steffens, Fernanda Oliveira, Fernando Ribeiro Postgraduate of Mechanical Engineering Federal University of Rio Grande do Norte Brazil Department of Engineering Federal University of Santa Catarina Campus Blumenau Brazil Postgraduate Program of Textile Engineering Federal University of Rio Grande do Norte Brazil

ISBN: (纸本)9783035713664

In this work, a weft-knitted fabric produced from 100% meta-aramid (MA) fibre was functionalized by using polyelectrolyte, Poly (diallyldimethylammonium chloride) (PDDA), in order to modify its surface for dyeing with an uncommon dye class for MA fibres. Contact angle, dye solution drop adsorption, Scanning Electron Microscopy (SEM), reflectance spectrophotometry, washing and rubbing fastness tests were performed to study the effects caused by the interaction between PDDA and MA fabric. Good results of dyebath exhaustion with excellent values of colour strength were obtained for the samples previously treated with PDDA. These results showed the possibility of obtaining distinct and deep colours besides generating a lower energetic cost using shorter time and lower dyeing temperature as compared to those normally used in the MA dyeing process. © 2019 Trans Tech Publications Ltd, Switzerland.

关键词： Polyelectrolytes

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Cellulose acetate nanofiber modified with polydopamine polymerized MOFs for efficient removal of noxious organic dyes

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Environmental Science and Pollution Research 2024年第20期31卷 29992-30008页

作者： Eze, Esther Omer, Ahmed M. Hassanin, Ahmed H. Eltaweil, Abdelazeem S. El-Khouly, Mohamed E. Nanoscience Program Institute of Basic and Applied Sciences Egypt-Japan University of Science and Technology New Borg El-Arab City Alexandria Egypt New Borg El-Arab City Alexandria Egypt Department of Textile Faculty of Engineering Alexandria University Alexandria Egypt Wilson College Textile North Carolina State University RaleighNC United States Department of Chemistry Faculty of Science Alexandria University Alexandria21934 Egypt Department of Engineering Faculty of Engineering and Technology University of Technology and Applied Sciences Muscat Oman

The need to effectively remove toxic organic dyes from aquatic systems has become an increasingly critical issue in the recent years. In pursuit of this objective, polydopamine (PDA)-binary ZIF-8/UiO-66 (MOFs) was synthesized and incorporated into cellulose acetate (CA), producing ZIF-8/UiO-66/PDA@CA composite nanofibers under meticulously optimized conditions. The potential of fabricated nanofibers to remove cationic methylene blue (MB) dye was investigated. Various analysis tools including FTIR, XRD, SEM, zeta potential, BET, tensile strength testing, and XPS were employed. Results revealed a substantial leap in tensile strength, with ZIF-8/UiO-66/PDA@CA registering an impressive 2.8 MPa, as a marked improvement over the neat CA nanofibers (1.1 MPa). ZIF-8/UiO-66/PDA@CA nanofibers exhibit an outstanding adsorption capacity of 82 mg/g, notably outperforming the 22.4 mg/g capacity of neat CA nanofibers. In binary dye systems, these nanofibers exhibit a striking maximum adsorption capacity of 108 mg/g, establishing their eminence in addressing the complexities of wastewater treatment. Furthermore, the adsorption data fitted to the Langmuir isotherm, and the pseudo-second-order kinetic model. The fabricated nanofiber demonstrates good reproducibility and durability, consistently upholding its performance over five cycles. This suite of remarkable attributes collectively underscores its potential as a robust, durable, and highly promising solution for the effective and efficient removal of pernicious MB dye, in the context of both water quality improvement and environmental preservation. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Adsorption

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Recycling Of PP/LDPE blend: Miscibility, thermal properties, rheological behavior and crystal structure 74

Recycling Of PP/LDPE blend: Miscibility, thermal properties,...

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74th Annual Technical Conference and Exhibition of the Society of Plastics Engineers, SPE ANTEC Indianapolis 2016

作者： Aumnate, Chuanchom Spicker, Claudia Kiesel, Raphael Samadi, Majid Rudolph, Natalie Mechanical Engineering Department Polymer Engineering Center University of Wisconsin-Madison WI United States Textile Science Department of Design Studies and Materials Science Graduate Program University of Wisconsin-Madison WI United States

ISBN: (纸本)9780692719619

Blending of plastics used in packaging is an interesting approach for recycling or upcycling. Therefore, this study focused on the effects of processing on the properties of recycled PP and PP/LDPE blends. MFI measurements, Differential Scanning Calorimetry (DSC) and hot-stage polarized optical microscopy techniques were used to investigate the miscibility of PP/LDPE blends based on the thermal properties, degree of crystallinity, crystallization and morphology development in the blends. The MFI indicates, that PP and PP/LDPE blends are marginally sensitive to degradation at common processing conditions. The degree of crystallinity of the blends decreases with an increase of the LDPE content. Furthermore, the spherulite growth rate and crystal size of PP decrease with an increase of LDPE content. The shifts of crystallization temperatures from the DSC measurement, in conjunction with the crystallization kinetics, indicate that PP/LDPE (25 wt% LDPE) is partially miscible.

关键词： Crystal structure

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Optimized CeO_(2) Nanowires with Rich Surface Oxygen Vacancies Enable Fast Li-Ion Conduction in Composite Polymer Electrolytes

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Energy & Environmental Materials 2023年第1期6卷 218-223页

作者： Lu Gao Nan Wu Nanping Deng Zhenchao Li Jianxin Li Yong Che Bowen Cheng Weimin Kang Ruiping Liu Yutao Li State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes School of Textile Science and EngineeringTiangong UniversityTianjin 300387China Materials Science and Engineering Program and Texas Materials Institute The University of Texas at AustinAustin TX 78712USA Department of Materials of Science and Engineering China University of Mining and Technology(Beijing)Beijing 100083China Enpower Energy Corp. Beijing 102600China

Low-cost and flexible solid polymer electrolytes are promising in all-solid-state Li-metal batteries with high energy density and ***,both the low room-temperature ionic conductivities and the small Li^(+)transference number of these electrolytes significantly increase the internal resistance and overpotential of the ***,we introduce Gd-doped CeO_(2) nanowires with large surface area and rich surface oxygen vacancies to the polymer electrolyte to increase the interaction between Gd-doped CeO_(2) nanowires and polymer electrolytes,which promotes the Li-salt dissociation and increases the concentration of mobile Li ions in the composite polymer *** optimized composite polymer electrolyte has a high Li-ion conductivity of 5×10^(-4)4 S cm^(-1) at 30℃ and a large Li+transference number of ***,the composite polymer electrolytes have excellent compatibility with the metallic lithium anode and high-voltage LiNi_(0.8)Mn _(0.1)Co_(0.1)O_(2)(NMC)cathode,providing the stable cycling of all-solid-state batteries at high current densities.

关键词： composite polymer electrolytes,Gd-doped CeO_(2)nanowires Li-ion conduction oxygen vacancies surface interaction

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Effects of intermingled yarn surface characteristics on knitted fabric's color parameters

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Tekstil ve Muhendis 2018年第112期25卷 327-334页

作者： Özkan, Ilkan Baykal, Pinar Duru Özdemir, Halil Department of Textile Engineering Faculty of Engineering Çukurova University Adana Turkey Textile Technology Program Osmaniye Vocational High School Osmaniye Korkut Ata University Osmaniye Turkey

Bu çalişmada puntalanmiş ipliklerin punta sayilarindaki değişimin, bu ipliklerden üretilen örme kumaşlarin açiklik-koyuluk (L*), yansima (R), Absorpsiyon katsayisi / Saçilma katsayisi (K/S) ve renk farkliliği (ΔE*) değerleri üzerinde etkililerinin araştirilmasi amaçlanmiştir. Bu amaçla 283 dtex lineer yoğunluğa sahip ve kesitinde 100 filament bulunan, farkli punta sayisina sahip ipliklerden düz örgü kumaşlar üretilmiştir. üretilen kumaşlar boyanmiş ve renk parametreleri ölçülmüştür. Elde edilen sonuçlar Realcolor 1.3 paket programi kullanilarak analiz edilmiştir. çalişma sonucunda punta sayisi ve kumaş konstrüksiyonundaki değişimin R ve L* değerleri üzerinde etkili olduğu tespit edilmiştir. © 2018, Journal of textiles and Engineer.

关键词： Colorimetry

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Development of woven fabrics for electromagnetic shielding by quality function deployment application

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Tekstil ve Muhendis 2019年第116期26卷 335-339页

作者： Kastaci, Bilge Berkhan Özek, H. Ziya Namik Kemal University Çerkezköy Vocational School Textile Technology Program Turkey Namik Kemal University Textile Engineering Department Çorlu Turkey

In order to determine a proper product solution for achieving customer satisfaction and business goals, the entire steps of product development become more significant and complicated when utilizing external resources. The purpose of this work is to develop a woven fabric with a sufficient electromagnetic shielding performance. The concept of Quality Function Deployment (QFD) is used for the development process in which customer needs are translated into product properties and manufacturing process parameters. Two different counts of silver coated yarns are selected to produce various woven structures with plain weave. The electromagnetic shielding effectiveness of these fabrics is measured within the frequency range of 30 MHz to 3000 MHz, by means of a coaxial transmission set-up. The sample incorporating silver coated yarns at both entire warp and weft appeared to provide a shielding efficiency of 40-70 dB at various frequency ranges. © Chamber of textile Engineers.

关键词： Electromagnetic shielding

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High-Performance 3-D Fiber Network Composite Electrolyte Enabled with Li-Ion Conducting Nanofibers and Amorphous PEO-Based Cross-Linked Polymer for Ambient All-Solid-State Lithium-Metal Batteries

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Advanced Fiber Materials 2019年第1期1卷 46-60页

作者： Chaoyi Yan Pei Zhu Hao Jia Jiadeng Zhu R.Kalai Selvan Ya Li Xia Dong Zhuang Du Indunil Angunawela Nianqiang Wu Mahmut Dirican Xiangwu Zhang Fiber and Polymer Science Program Department of Textile EngineeringChemistry and ScienceWilson College of TextilesNorth Carolina State UniversityRaleighNC 27695-8301USA Department of Physics and Organic and Carbon Electronics Lab North Carolina State UniversityRaleighNC 27695-8301USA Department of Mechanical and Aerospace Engineering West Virginia UniversityMorgantownWV 26506USA

Solid electrolytes have gained attention recently for the development of next-generation Li-ion batteries since they can fun-damentally improve the battery stability and *** various types of solid electrolytes,composite solid electrolytes(CSEs)exhibit both high ionic conductivity and excellent interfacial contact with the *** active nanofib-ers into the polymer matrix demonstrates an effective method to fabricate ***,current CSEs based on traditional poly(ethylene oxide)(PEO)polymer suffer from the poor ionic conductivity of PEO and agglomeration effect of inorganic fillers at high concentrations,which limit further improvements in Li+conductivity and electrochemical ***,we synthesize a novel PEO based cross-linked polymer(CLP)as the polymer matrix with naturally amorphous structure and high room-temperature ionic conductivity of 2.40×10^(−4)S cm^(−1).Li_(0.3)La_(0.557)TiO_(3)(LLTO)nanofibers are incorporated into the CLP matrix to form composite solid electrolytes,achieving enhanced ionic conductivity without showing filler *** high content of Li-conductive nanofibers improves the mechanical strength,ensures the conductive network,and increases the total Li+conductivity to 3.31×10^(−4)S cm^(−1).The all-solid-state Li|LiFePO_(4)batteries with LLTO nanofiber-incorporated CSEs are able to deliver attractive specific capacity of 147 mAh g^(−1)at room temperature,and no evident dendrite is found at the anode/electrolyte interface after 100 cycles.

关键词： Cross-linked PEO polymer Li_(0.33)La_(0.55)TiO_(3)nanofibers Composite solid electrolyte All-solid-state batteries Ambient working temperature

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Development of a biodegradable nanofiber scaffold by optimization of electrospinning process parameters

Development of a biodegradable nanofiber scaffold by optimiz...

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2005 Summer Bioengineering Conference

作者： Chen, Ming Patra, Prabir Warner, Steve Bhowmick, Sankha Biomedical Engineering and Biotechnology Program University of Massachusetts Dartmouth North Dartmouth MA Textile Science Department University of Massachusetts Dartmouth North Dartmouth MA Mechanical Engineering Department University of Massachusetts Dartmouth North Dartmouth MA

ISBN: (纸本)0974249211

The goal of the current study was to develop a three dimensional scaffold for creating tissue engineered bioactive bandages. In the current study, we chose polycaprolactone (PCL) as the biomaterial and optimized the electro spinning process parameters: concentration, voltage and the distance between capillary and collection screen. Using scanning electron microscopy (SEM), we measured the fiber diameter and also studied the growth of NIH 3T3 fibroblasts into electrospun PCL scaffolds after various days post seeding. Our studies have been able to obtain uniform fibers of a minimal diameter of 650nm which also provides the best environment for cell growth.

关键词： Nanostructured materials

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Li₂MnSiO₄/Carbon Composite Nanofibers as a High-Capacity Cathode Material for Li-Ion Batteries

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Soft Nanoscience Letters 2012年第3期2卷 54-57页

作者： Shu Zhang Ying Li Guanjie Xu Shuli Li Yao Lu Ozan Topracki Xiangwu Zhang Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science North Carolina State University Raleigh NC..

Li2MnSiO4 has an extremely high theoretical capacity of 332 mAh?g?1. However, only around half of this capacity has been realized in practice and the capacity retention during cycling is also low. In this study, Li2Mn... 详细信息

Li₂MnSiO₄ has an extremely high theoretical capacity of 332 mAh?g^?1. However, only around half of this capacity has been realized in practice and the capacity retention during cycling is also low. In this study, Li₂MnSiO₄/carbon composite nanofibers were prepared by a combination of electrospinning and heat treatment. The one-dimensional continuous carbon nanofiber matrix serves as long-distance conductive pathways for both electrons and ions. The composite nanofiber structure avoids the aggregation of Li₂MnSiO₄ particles, which in turn enhances the electrode conductivity and promotes the reaction kinetics. The resultant Li₂MnSiO₄/carbon composite nanofibers were used as the cathode material for Li-ion batteries, and they delivered high charge and discharge capacities of 218 and 185 mAh?g^?1, respectively, at the second cycle. In addition, the capacity retention of Li₂MnSiO₄ at the first 20th cycles increased from 37% to 54% in composite nanofibers.

关键词： Electrospinning Li2MnSiO4 Carbon Nanofibers Li-Ion Battery

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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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