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作者： Tsotsisa, Thomas K. Kotov, Nicholas Zhu, Jian Kumar, Satish Chae, Han Gi Choi, Young Ho Jain, Rahul Baek, Jong-Beom Department of Chemical Engineering University of Michigan Ann Arbor MI United States School of Polymer Textile and Fiber Engineering Georgia Institute of Technology Atlanta GA United States Ulsan National Institute of Science and Technology Korea Republic of

ISBN: (纸本)9781934551073

Layer-by-layer (LBL) deposition of carbon nanotubes (CNTs) over fibers that are also reinforced with CNTs has been performed and shows promise for a scalable process for making conductive organic filaments. Descriptions of the fabrication of polymer filaments and LBL-deposition methods will be provided along with some results and examples of possible applications of this technology.

关键词： Carbon nanotubes

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Mesoporous activated carbon nanofiber synthesis from catalytic graphitization of polyacrylonitrile/cobalt sulfide composite

Mesoporous activated carbon nanofiber synthesis from catalyt...

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fiber Society 2012 Fall Meeting and Technical Conference in Partnership with polymer fibers 2012: Rediscovering fibers in the 21st Century

作者： Aykut, Yakup Pourdeyhimi, Behnam Khan, Saad A. Department of Textile Engineering Uludaǧ University Bursa16059 Turkey Fiber and Polymer Science North Carolina State University RaleighNC27695-8301 United States Chemical and Biomolecular Engineering North Carolina State University RaleighNC27695-7905 United States

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Facile alignment of carbon nanotubes mediated by tethered maghemite nanoparticles

Facile alignment of carbon nanotubes mediated by tethered ma...

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作者： Kim, Il Tae Nunnery, Grady A. Jacob, Karl Schwartz, Justin Liu, Xiaotao Tannenbaum, Rina Materials Science and Engineering Georgia Institute of Technology Atlanta GA United States Polymer Textile and Fiber Engineering Georgia Institute of Technology Atlanta GA United States Mechanical Engineering Florida State University Tallahassee FL United States Chemical Engineering Technion-Israel Institute of Technology Haifa Israel

ISBN: (纸本)9781605112350

We describe a novel, facile method for the alignment of multi-walled carbon nanotubes (MWNTs) in a magnetic field facilitated by the decoration of the MWNTs with monodisperse γ-Fe2O3 magnetic (maghemite) nanoparticles. The tethering of the nanoparticles was achieved by the attachment of γ-Fe2O3 nanoparticles that were synthesized using a modified sol-gel process, onto the carboxylate-activated MWNTs. Sodium dodecylbenzene sulfonate (NaDDBS) was used to prevent the formation of an iron oxide 3D network. Various characterization methods were employed to confirm the formation of homogeneously-distributed and nearly-monodispersed iron oxide nanoparticles, and show that they were indeed tethered to the walls of the MWNTs. The γ-Fe2O3 nanoparticles imparted magnetic characteristics to the MWNTs, which in turn, were oriented parallel to the direction of an externally-applied magnetic field. This facile alignment of MWNT could promote the enhancement of various properties, e.g. mechanical and electrical properties, of the resulting composites. Moreover, this facile alignment at low magnetic fields, made possible by the magnetization of the carbon nanotubes through the tethering of maghemite nanoparticles, may be applied to a variety of other useful nanofillers, such a glass fibers, clay nanoparticles and cellulose nanowhiskers. © 2010 Materials Research Society.

关键词： Alignment

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Electrospinning of Neat Graphene Nanofbers

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Advanced fiber Materials 2022年第2期4卷 268-279页

作者： Zhanpo Han Jiaqing Wang Senping Liu Qinghua Zhang Yingjun Liu Yeqiang Tan Shiyu Luo Fan Guo Jingyu Ma Peng Li Xin Ming Chao Gao Zhen Xu MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringKey Laboratory of Adsorption and Separation Materials and Technologies of Zhejiang ProvinceZhejiang University38 Zheda RoadHangzhou 310027People’s Republic of China State Key Laboratory for Modifcation of Chemical Fibers and Polymer Materials Donghua UniversityShanghai 200051People’s Republic of China State Key Laboratory of Bio-Fibers and Eco-Textiles Collaborative Innovation Center of Marine Biobased Fiber and Ecological Textile TechnologySchool of Materials Science and EngineeringQingdao UniversityQingdao 266071People’s Republic of China

Macroscopic assembly of graphene sheets has renovated the preparation of neat carbonaceous fbers with integrating high performance and superior functionalities,beyond the pyrolysis of conventional polymeric *** date,graphene microfbers by the liquid crystalline wet-spinning method have been ***,how to reliably prepare continuous neat graphene nanofbers remains ***,we present the electrospinning of neat graphene nanofbers enabled by modulating colossally extensional fow state of graphene oxide liquid *** use polymer with mega molecular weight as transient additives to realize the colossal extensional fow and *** neat graphene nanofbers feature high electronic quality and crystallinity and exhibit high electrical conductivity of 2.02×10^(6) S/m that is to be comparable with single crystal graphite *** electrospinning of graphene nanofbers was extended to prepare large-area fabric with high fexibility and superior specifc electrical/thermal *** electrospinning of graphene nanofbers opens the door to nanofbers of rich two-dimensional sheets and the neat graphene nanofbers may grow to be a new species after conventional carbonaceous nanofbers and whiskers in broad functional applications.

关键词： Electrospinning Graphene nanofber Functional fabrics

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Centrifugal Spinning: An Alternative Approach to Produce Nanofibers at High Speed and Low Cost

Centrifugal Spinning: An Alternative Approach to Produce Nan...

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The 89th textile Institute World Conference(第89届世界纺织大会)

作者： Yao Lu Xiangwu Zhang Fiber and Polymer Science Program Department of Textiles EngineeringChemistry and ScienceNorth Carolina State University

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Electrospun Nanofibers Enabled Advanced Lithium−Sulfur Batteries

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Accounts of Materials Research 2022年第2期3卷 149-160页

作者： Jiadeng Zhu Hui Cheng Pei Zhu Ya Li Qiang Gao Xiangwu Zhang Chemical Sciences Division Oak Ridge National LaboratoryOak RidgeTennessee 37831United States Fiber and Polymer Science Program Wilson College of TextilesNorth Carolina State UniversityRaleighNorth Carolina 27695-8301United States College of Textile Science and Engineering International College of SilkZhejiang Sci-Tech UniversityHangzhou 310018China School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China

CONSPECTUS:Lithium−sulfur(Li−S)batteries have been extensively studied because both S and Li have high theoretical capacities,and S is abundant and environmentally ***,their practical applications have been hindered by several challenges,including poor conductivity of S and its intermediates,shuttle effects of polysulfides,Li dendrite growth,*** efforts have been taken to tackle these issues by developing functional S host materials,separators and interlayers,solid-state electrolytes,etc.,during the past *** to structurally complicated materials and intricate preparation approaches,electrospun nanofibers have obtained tremendous interests since they have played an extremely crucial role in improving the overall performance of Li−S cells due to their unique features such as easy-setup,substantial surface area,outstanding flexibility,high porosity,excellent mechanical properties,etc.

关键词： fibers porosity conductivity

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A Review on Digital Simulation Strategies and Its Applications for Advanced Compression Garments

A Review on Digital Simulation Strategies and Its Applicatio...

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作者： Seonyoung Youn Ryan Darden Kavita Mathur Fiber and Polymer Science Ph.D.program North Carolina State University Department of Textile Engineering Chemistry and Sciences M.S.Textile Engineering program North Carolina State University Department of Textile and Apparel Technology and Management North Carolina State University

This paper presents a comprehensive review on the current state of digital simulation technology and its strategic application usages with a key focus on advanced compression garments. Although three-dimensional(3D) digital garment simulators have significantly impacted the apparel and textile industry, their use has been limited to visual prototyping, quality checking, or marketing. The physical properties of garment simulators have been overlooked in advanced functional manufacturing. This literature review investigates the possibility of strategically utilizing virtual physical properties to enhance garment functions, specifically in wearables and medical-grade compression fields. The first phase of this paper gives an overview of the current state of 3D garment simulation tools and their measurement features. This is followed by a gap analysis between simulated and physical property evaluations, focusing on minimizing the gaps. The literature is thoroughly examined to identify appropriate studies that uses digital tools for compressional garments and add value to wearables and healthcare applications. This paper provides valuable insights for apparel and textile engineers, enabling them to better understand the limitations and capabilities of garment simulators in improving advanced features for specific end users.

关键词： 3D Digital Garment Simulator Advanced Compression Garment Digital Strategy Medical-grade Compression Simulated Physical Property Virtual Evaluation

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A Braided Flexible Zn-MnO2 Yarn Battery Based on Cobweb-Like Carbonized Polypyrrole Modified Carbon fiber Electrodes

SSRN

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SSRN 2023年

作者： Chen, Lei Hu, Kairui Yang, Ke Yanilmaz, Meltem Han, Xu Liu, Yong Zhang, Xiangwu School of Textile Science and Engineering Tiangong University Tianjin300387 China Department of Textile Engineering Istanbul Technical University Istanbul Turkey Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science Wilson College of Textiles North Carolina State University RaleighNC27695 United States

Flexible zinc ion batteries (ZIBs) are promising candidate for energy storage devices because of high safety and low cost. Carbon fiber (CF) is an ideal current collector for ZIBs due to its good flexibility, electrical conductivity and corrosion resistance. Herein, a novel CF-based current collector is proposed. At first, the inertness and non-polarity of CF were significantly modified by activating and etching to obtain a multi-layered pore structure. After then, carbonized polypyrrole (CPPy) nanowire conductive networks were built up on etched carbon fiber (ECF) by electrochemical in-situ growing and carbonization. Based on the CPPy network, MnO2 nanoflowers were grown firmly by the hydrothermal method to construct a multilayer MnO2@CPPy@ECF composite electrode. The multi-layered three-dimensional CPPy conductive network is rooted in the interior of MnO2, providing a dedicated transmission path for both electrons and ions during electrochemical redox reactions. The MnO2@CPPy@ECF electrode had an initial capacity of 346.1 mAh·g-1 at 0.1 A·g-1 and 252.8 mAh·g-1 after 800 cycles. In addition, the integrated flexible Zn-MnO2 2D fabric battery with MnO2@CPPy@ECF fabric cathode shows a specific capacity of 254.7 mAh·g-1 at 0.1 A · g-1. Finally, a flexible Zn-MnO2 yarn battery with unique structural advantages of high flexibility, shape adaptability, structural integrity and good mechanical stability was fabricated by the 2D braid method. The initial specific capacity of the flexible Zn-MnO2 yarn battery is 111.7 mAh·g-1 at 0.1C, and the coulomb efficiency reaches more than 98%. This work opens up a new pathway for the rational design of flexible electrodes for wearable ZIBs. © 2023, The Authors. All rights reserved.

关键词： Yarn

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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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Fracture of CSL boundaries in Cu and Al

Fracture of CSL boundaries in Cu and Al

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11th International Conference on Fracture 2005, ICF11

作者： Spearot, Douglas E. Jacob, Karl I. McDowell, David L. G.W. Woodruff School of Mechanical Engineering Georgia Institute of Technology Atlanta GA 30332 United States School of Polymer Textile and Fiber Engineering Georgia Institute of Technology Atlanta GA 30332 United States School of Materials Science and Engineering Georgia Institute of Technology Atlanta GA 30332 United States

ISBN: (纸本)9781617820632

Molecular dynamics (MD) simulations using embedded-atom method (EAM) potentials are used to study the fundamental failure processes that occur on the nanoscale in copper and aluminum as a result of an applied boundary deformation. This work focuses on tensile deformation and fracture of 'near' and 'exact' Coincident Site Lattice (CSL) grain boundaries. Previous experimental and simulation work has shown that grain boundaries with CSL misorientations may have a lower grain boundary energy, which suggests that these boundaries may have unique fracture properties as compared with general high-angle grain boundaries. In this communication we study grain boundary interface models formed by a symmetric rotation of the opposing lattice regions around a [100] misorientation axis. Interface structures are created using a 0 K energy minimization procedure with a nonlinear conjugate gradient algorithm. Tensile deformation calculations are performed at 300 K using appropriate temperature controls. For the range of interface misorientation angles examined in this work, the interface structure appears to play a role in the tensile deformation response. Specifically, the peak tensile stress within the interface region shows a modest increase for interface models with exact ∑5 (310) orientation in copper and exact ∑5 (210) orientation in aluminum. Interface models with near ∑5 interface misorientations show a reduced peak stress by comparison. An approximation of interface porosity on the nanoscale is calculated by monitoring the coordination number of each atom within the interface region. MD simulations show that the nanoporosity measurement is capable of differentiating between grain boundaries on the nanoscale, and thus is appropriate to relate the interface structure to the interface strength for the purpose of making connections to microstructure-sensitive continuum interface separation potentials.

关键词： Molecular dynamics

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