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Dense carbon nanofiber self-supporting electrode fabricated by orientation/compaction strategy for high volumetric lithium storage capacity

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Progress in Natural Science:Materials International 2025年第1期35卷 229-237页

作者： Haihui Liu Chaoqun Chen Qiang Xu Yan Song Xiangwu Zhang Chang Ma Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology Tiangong University CAS Key Laboratory of Carbon Materials Institute of Coal Chemistry Chinese Academy of Sciences Fiber and Polymer Science Program Department of Textile Engineering Chemistry and Science Wilson College of Textiles North Carolina State University

Low bulk density greatly restricts the large-scale application of electrospun carbon-based fiber membrane as electrode in energy storage devices. To solve the above challenges, herein an orientation-compaction densification strategy is proposed to enhance the bulk density and volumetric capacity of PAN-based carbon nanofiber membranes as self-supporting electrode used in lithium-ion batteries（LIBs）. Specifically, highly-oriented fibers are achieved by high-speed roller collecting during electrospinning, and compaction densification is conducted by hot-pressing treatment. The effects of collecting speed and hot-pressing pressure on the morphology, conductivity,bulk density, tensile strength, and flexibility of the obtained carbon nanofiber membrane are *** to conventional fiber membranes, of which fibers are disorderly stacked, the oriented fiber membrane is much easier to achieve dense stacking by compaction. The obtained dense carbon nanofiber membrane demonstrates a bulk density of 0.566 g cm-3, and shows a significantly-enhanced volumetric capacity(318.3 mA h cm-3), high-rate performance(86.6 mA h cm-3at 5 A g-1), and satisfactory cycling stability when used as selfsupporting electrode of LIBs.

关键词： Bulk density Densification Electrospinning Orientation-compaction Volumetric capacity

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Exploring barriers to ICT adoption in road freight operations 6

Exploring barriers to ICT adoption in road freight operation...

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6th International Conference on Industry 4.0 and Smart Manufacturing, ISM 2024

作者： Callefi, Mario Henrique Shiramizu, Sara Yumi De Carvalho, Luiz Antonio Thürer, Matthias Cotrim, Syntia Lemos Del Rosso Calache, Lucas Daniel Chair of Factory Planning and Intralogistics Chemnitz University of Technology Chemnitz09125 Germany Department of Textile Engineering State University of Maringá Avenue Reitor Zeferino Vaz S/n Goioere87360-000 Brazil Post Graduation Program in Production Engineering State University of Maringá Avenue Colombo 5790 Maringá87020-900 Brazil School of Engineering Campus of Sao Joao da Boa Vista Av. Profa. Isette Corrèa Fontão 505 São João da Boa Vista13876-750 Brazil

This study investigates barriers to adopting Information and Communication technology (ICT) in road freight transportation, a sector where operational efficiency is crucial. A mixed-method approach comprising a Systematic Literature Review, the Fuzzy Delphi Method, and the Best and Worst Method was employed to evaluate these barriers. Five main obstacles were identified: lack of top management and investor support, resistance to change, absence of economic and political incentives, uncertainties regarding return on investment, and high technology investment costs. The most significant barrier was the lack of top management support, which influenced investment and strategic decisions. Theoretically, the research enhances understanding of technology adoption barriers in road freight transportation, providing insights for future academic and practical applications. From a managerial point of view, this study offers insights to improve ICT adoption strategies, thereby boosting sector efficiency and competitiveness. © 2024 The Authors. Published by Elsevier B.V.

关键词： ICT adoption barriers Multi-criteria decision making Road freight transportation

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Graphene-functionalized textile composites for wearable Joule heating applications

Advanced Nanocomposites

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Advanced Nanocomposites 2025年 2卷 108-123页

作者： Omar Faruk Abbas Ahmed Ashfaqul Hoque Khadem Lu Jia Luyi Sun Department of Materials Science and Engineering Binghamton University State University of New York at Binghamton NY 13902 USA Polymer Program Institute of Materials Science and Department of Chemical & Biomolecular Engineering University of Connecticut Storrs CT 06269 USA Department Mechanical Engineering College of Engineering Computing and Applied Science Clemson University Clemson SC 29634 USA College of Textile Engineering Taiyuan University of Technology Jinzhong Shanxi 030600 China

Thermal comfort is essential for maintaining physiological well-being, with textile materials traditionally serving as the primary medium for regulating heat exchange between the body and its environment. However, conventional textiles often fall short of maintaining optimal thermal balance. So, there is an increasing demand for advanced thermoregulation systems that can effectively reduce heat loss and enhance warmth, ensuring consistent comfort. Recent research has highlighted the promise of advanced functional materials, especially graphene and its composites, for modifying textiles to improve thermal properties. This article comprehensively reviews recent advancements in graphene-functionalized textile composites, focusing on their applications in wearable Joule heaters designed for personalized thermal comfort or thermal therapy. Various graphene-functionalized textile composites are reviewed from the perspectives of material properties, processing strategies and device fabrication methods. Key challenges and future opportunities are summarized for graphene-functionalized textile-based Joule heaters as innovative solutions in wearable thermal regulation.

关键词： Graphene textile Composite Wearable electronics Joule heater

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Kinetics of water swelling and development of porous structure in ionic poly(acrylonitrileacrylamide-acrylic acid) hydrogels

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POLYMER 1996年第6期37卷 1019-1025页

作者： Hu, DSG Chou, KJN Program in Polymers Department of Textile Engineering National Taiwan Institute of Technology Taipei Taiwan 107 ROC

The kinetics of water uptake into the dry form of, and benzoic acid diffusion through, swollen inhomogeneous poly(acrylonitrile-acrylamide-acrylic acid) gels were investigated with gravimetry and ultra-violet visible spectroscopy, respectively. The goal is to understand the effects of ionizable moieties and water-polymer affinity on the rate of water diffusion during the formation of hydrogels from glassy polymers and on the free-volume mechanism for solute transport through the resulting swollen networks. The xerogel with intermediate acid content or minimal affinity with water has the maximum water diffusion coefficient in the initial swelling stage and the maximum deviation from Fickian transport. The molecular diffusion of benzoic acid through hydrogels was found to be controlled by the swelling, and the size of voids for solute diffusion does not remain constant over all the range of compositions. This discrepancy from the simple free-volume theory is due to a wide range of molecular interactions for gels with amide/acid moieties. In conclusion, dynamic swelling is influenced by water-polymer affinity and subsequently causes various types of steady transport in hydrogels.

关键词： dynamic swelling solute diffusion ionic hydrogels

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Toughening isotactic polypropylene and propylene-ethylene block copolymer with stylene-ethylene butylene-styrene triblock copolymer

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Journal of Polymer Research 1995年第1期2卷 21-21页

作者： Chiu, H.-T. Shiau, Y.-G. Chiu, W.-M. Syau, S.-S. Research Program for Polymer and Textile National Taiwan Institute of Technology Taipei Taiwan ROC

Dynamic mechanical properties, low-temperature impact behavior, flexural modulus and heat distortion temperature (HDT) of isotactic polypropylene (i-PP) and propylene-ethylene block copolymer (Co-PP) toughened with styrene-ethylene butylene-styrene triblock copolymer (SEBS), at blending ratios of 0–30 phr, were studied and compared. A scanning electron microscopic morphology study of the impact-fractured surfaces demonstrated the changes in fracture mechanisms at various temperatures and SEBS contents. SEBS remarkably improves the impact endurance in the lower-temperature range when blended with Co-PP in comparison with i-PP, due to the increased compatibility in the interface between SEBS particles and the Co-PP matrix.

关键词： Blend Polypropylene Propylene-ethylene block copolymer Styrene-ethylene butylene-styrene (SEBS) Toughening

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WATER-POLYMER INTERACTIONS AND CRITICAL PHENOMENA OF SWELLING IN INHOMOGENEOUS POLY(ACRYLONITRILE-ACRYLAMIDE-ACRYLIC ACID) GELS

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POLYMER 1994年第20期35卷 4416-4422页

作者： HU, DSG LIN, MTS Program in Polymers and Textiles Department of Textile Engineering National Taiwan Institute of Technology Taipei Taiwan 107 Republic of China

The water uptake and swelling behaviour of physically crosslinked, inhomogeneous poly(acrylonitrile-acrylamide-acrylic acid) hydrogels from 10 to 60 degrees C were determined by gravimetry/differential scanning calorimetry and volume measurement, respectively. The contents of water and its non-bound portion were found to reach a minimum value at acrylamide content around 33.5 mol%, at which the water uptake of this gel does not vary with the temperature. The non-bound water was found to decrease gradually and then increase with increasing amide concentration. The duration of the post-gelation treatment between -10 and 10 degrees C was also shown to be one of the factors affecting the extent of the water uptake in gels. The critical endpoint temperatures (T(c)s) of hydrogels, obtained from volume phase transition data upon changing the acetone concentration in aqueous solutions at various temperatures, were shown to decrease with the increasing acid or amide contents. The water uptake for gels with lower amide contents decreases with increasing temperature. However, there is an opposite trend for water uptake in gels with higher amide content, and the critical points on the plots of the amount of water uptake versus temperature appear at a temperature equal to T-c.

关键词： INHOMOGENEOUS HYDROGELS SWELLING PHASE TRANSITION

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Correlation between interfacial free energy and albumin adsorption in poly(acrylonitrile-acrylamide-acrylic acid) hydrogels

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JOURNAL OF APPLIED POLYMER SCIENCE 1996年第12期59卷 1809-1817页

作者： Hu, DSG Tsai, CE Program in Polymers and Textiles Department of Textile Engnineering National Taiwan Institute of Technology Taipei Taiwan 10772 Republic of China

An investigation on the influence of chemical compositions and surface properties (e.g., surface free energy in air and hydrogel-water interfacial energy) on the adsorption of bovine serum albumin (BSA) at pH 7.4 on to a series of poly(acrylonitrile-acrylamide-acrylic acid) hydrogels was carried out. The interfacial energetics were determined from the contact angle data for air-gel and octane-gel in the water environment and the specific adsorption of BSA was determined with UV-VIS spectroscopy. It is shown that the higher contents of amide and acid groups in hydrogel bulk lead to the greater polar component of surface energy in air and the greater BSA adsorption in aqueous solutions. The BSA adsorption decreases with water amount in gels at lower amide/acid contents and increases at higher contents. The results imply that the interfacial interactions between the protein and the reorganized hydrogel interface in exposure with water, as well as the penetration of protein into pores of swollen gels, influence the BSA adsorption. (C) 1996 John Wiley & Sons, Inc.

关键词： Hydrogels

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Exploring barriers to ICT adoption in road freight operations

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Procedia Computer Science 2025年 253卷 1702-1711页

作者： Mario Henrique Callefi Sara Yumi Shiramizu Luiz Antonio de Carvalho Matthias Thürer Syntia Lemos Cotrim Lucas Daniel Del Rosso Calache Chair of Factory Planning and Intralogistics Chemnitz University of Technology 09125 Chemnitz Germany Department of Textile Engineering State University of Maringá Avenue Reitor Zeferino Vaz S/n Goioerê 87360-000 Brazil Post graduation program in Production Engineering State University of Maringá Avenue Colombo 5790 Maringá 87020-900 Brazil Sao Paulo State University (Unesp) School of Engineering Campus of Sao Joao da Boa Vista Av. Profa. Isette Corrèa Fontão 505 São João da Boa Vista 13876-750 Brazil

关键词： ICT adoption barriers Road freight transportation Multi-criteria decision making

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SYNTHESIS AND DIELECTRIC CHARACTERIZATION OF POLY[ACRYLONITRILE-CO-ACRYLAMIDE-CO-(ACRYLIC ACID)] TERPOLYMER GELS

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MACROMOLECULAR CHEMISTRY AND PHYSICS 1994年第11期195卷 3629-3642页

作者： HU, DSG LIN, YS Program in Polymers and Textiles Dept. of Textile Engineering National Taiwan Institute of Technology Taipei Taiwan 107 R. O. C

The acidic hydrolysis of polyacrylonitrile, stabilization and thermal gelation in mixed solvents were sequentially carried out to yield a variety of terpolymer gels made up of 58,5 to 89,4 mol-% units of acrylonitrile, 10,2 to 39,2 mol-% acrylamide and 0,4 to 2,3 mol-% acrylic acid. The post-hydrolysis stabilization at temperature below 0-degree-C was shown to induce chemical conversion from acrylonitrile to acrylamide, that is more pronounced for a certain range of initial acrylamide contents than others as evidenced by the kinetic analysis using H-1 NMR and base titration. The dielectric relaxation measurements on swollen gels show three relaxation transitions, alpha, beta and gamma in decreasing order of temperature, over -150 to 0-degree-C. The alpha-transition, due to the segmental motion of the polymer, is the least distinct of the three. The beta- and gamma-transitions in decreasing order of temperature are associated with the cooperative motion of polar groups with water and glass transition of water, respectively, as judged from the activation energy and temperature of relaxation. The beta-relaxation was shown to be strongly influenced by the type of swelling solvent in the gel, water contents and chemical composition of the gel. Furthermore, the Cole-Cole plots in the region of the beta-relaxation were constructed to demonstrate the role of morphology in the dielectric behaviour of hydrogels.

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Corrigendum to “Synthesis and characterization of eco-friendly chitosan-based waterborne polyurethanes and their ultraviolet degradation properties” [Polymer Degradation and Stability, 233 (2025) 111169]

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Polymer Degradation and Stability 2025年 236卷

作者： Chun-Ta Wei Jhu-Lin You Kai-Yen Chin Shu Mei Chang Shun-Yi Jian An-Yu Cheng Department of Chemical & Materials Engineering Chung Cheng Institute of Technology National Defense University Taoyuan 335 Taiwan System Engineering and Technology Program National Chiao Tung University Hsinchu 300 Taiwan Institute of Organic and Polymeric Materials Research and Development Centre for Smart Textile Technology National Taipei University of Technology Taipei 10608 Taiwan Department of Material Engineering Ming Chi University of Technology New Taipei 24301 Taiwan Center for Plasma and Thin Film Technologies Ming Chi University of Technology New Taipei 243303 Taiwan

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