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Controllable large-scale processing of temperature regulating sheath-core fibers with high-enthalpy for thermal management

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Nano Materials Science 2024年第3期6卷 337-344页

作者： Ziye Chen Zexu Hu Shining Chen Senlong Yu Liping zhu Hengxue Xiang meifang zhu Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China College of Mechanical and Engineering Donghua UniversityShanghai201620China

Temperature regulating fibers(TRF_(s)) with high enthalpy and high form stability are the key factors for thermal management. However, the enthalpies of most TRFsare not high, and the preparation methods are still at the laboratory scale. It remains a great challenge to use industrial spinning equipment to achieve continuous processing of TRF_(s) with excellent thermal and mechanical properties. Here, polyamide 6(PA6) based TRF_(s) with a sheath-core structure were prepared by bicomponent melt-spinning. The sheath-core TRF(TRF_(sc)) are composed of PA6 as sheath and functional PA6 as core, which are filled with the shape stable phase change materials(ssPCM),dendritic silica@polyethylene glycol(SiO_(2)@PEG). With the aid of the sheath structure, the filling content of SiO_(2)@PEG can reach 30 %, so that the enthalpy of the TRF_(s) can be as high as 21.3 J/g. The ultra-high enthalpy guarantees the temperature regulation ability during the alternating process of cooling and heating. In hot environment, the temperature regulation time is 6.59 min, and the temperature difference is 12.93℃. In addition, the mechanical strength of the prepared TRF_(sc) reaches 2.26 cN/dtex, which can fully meet its application in the field of thermal management textiles and devices to manage the temperature regulation of the human body or precision equipment, etc.

关键词： Thermal management Hybrid fibers Polyamides Bicomponent melt spinning Temperature regulating fibers

Constructing on-demand single/multi-color transitioning fabrics with photocatalysis/photothermal-armed deficient semiconductors

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Nano Research 2024年第5期17卷 3633-3643页

作者： Daniel K.Macharia Shamima Sarker Meng Liu Zeyulong Wen Nuo Yu meifang zhu Zhigang Chen State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

On-demand color switching systems that utilize synchronized semiconductor-catalyzed reduction and photothermal-accelerated oxidation in liquid/solid are highly ***,on-demand single/multi-color switching fabrics have been constructed by using defective SnO_(2):Sb-based color switching ***_(2):Sb nanocrystals with the suitable doping concentration accord lattices with abundant free electrons,conferring high photocatalytic and photothermal performances.A well-crafted set of dual light-responsive semiconductor-catalyzed systems with rapid color change can be attained via the homogenous mixture of SnO_(2):Sb with suitable redox dyes to produce single-color(RGB(red,green,blue))and multi-color transitioning(purple and green)*** illumination of these systems by 450 nm light triggers rapid photocatalytic discoloration,while irradiation by 980 nm light confers the photothermal effect that accelerates recoloration in ***,the inks can be extended to rewritable fabrics by embedding the nanocrystals and redox dyes into hydroxyethyl cellulose(as the polymer matrix)and then coating on hydrophobic cotton fabrics to produce photo-switchable fabrics with excellent single/multi-color *** exploiting the dual light interactions with the semiconductor-mediated systems,various images/letters can be remotely printed and erased on the rewritable fabrics which show promise for potential applications as information storage media and visual ***,the present rewritable fabric shows good stability and *** present work provides insights into the development of novel color-switching materials.

关键词： color switching defective semiconductor photocatalysis photothermal rewritable fabrics

氢键/二硫键协同的室温修复聚氨酯的制备及性能研究

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中国材料进展 2024年第7期43卷 658-665页

作者：童永仲潘绍武朱美芳东华大学材料科学与工程学院纤维材料改性国家重点实验室上海201620

自修复材料作为一类新兴的智能材料,具有广泛的应用前景,然而此类材料难以兼具良好的力学性能与自修复能力。以聚四氢呋喃(PTMEG)为软段、异佛尔酮二异氰酸酯(IPDI)和双(4-羟苯基)二硫醚(4-HD)为扩链剂共同构成硬段,通过两步扩链反应制... 详细信息

自修复材料作为一类新兴的智能材料,具有广泛的应用前景,然而此类材料难以兼具良好的力学性能与自修复能力。以聚四氢呋喃(PTMEG)为软段、异佛尔酮二异氰酸酯(IPDI)和双(4-羟苯基)二硫醚(4-HD)为扩链剂共同构成硬段,通过两步扩链反应制备了室温自修复聚氨酯(PUHD),并分别研究了单体配比与扩链剂的分子结构对PUHD的力学与自修复性能的影响。结果表明:当R值(R=[IPDI]/[PTMEG])为1.5时,PUHD的综合性能最佳,拉伸强度、断裂伸长率与韧性分别为7.53 MPa、1447.80%与31.98 MJ/m^(3)。PUHD-1.5具有良好的流变性能,在25与60℃下的特征弛豫时间分别为23.45与7.10 min,在25℃下修复6 h,断裂伸长率与拉伸强度的修复效率分别为95.29%和89.95%。扩链剂的分子结构对PUHD的自修复性能有显著影响,弱氢键作用与松散堆积的硬段有利于提高PUHD的自修复性能。

关键词：室温自修复聚氨酯硬段力学性能氢键二硫键

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创制纤维新材料,发展新质生产力——第二十六届中国科协年会主论坛主旨报告摘要

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科技导报 2024年第12期42卷 15-15页

作者：朱美芳东华大学上海201620

纤维材料是指具有足够的细度(直径1000),具有定向导向性、可编程性、可柔性加工的物质。自古以来,纤维就与人类生活密切相关。从棉麻丝毛等天然纤维发展到高性能和功能性合成纤维,纤维与人类社会的联系越来越紧密。由于纤维材料的柔性... 详细信息

纤维材料是指具有足够的细度(直径1000),具有定向导向性、可编程性、可柔性加工的物质。自古以来,纤维就与人类生活密切相关。从棉麻丝毛等天然纤维发展到高性能和功能性合成纤维,纤维与人类社会的联系越来越紧密。由于纤维材料的柔性和多样化的可加工特性,其应用已经超越了传统织物和纺织品,在战略新兴产业如人工智能、电子信息、航空航天、新能源、生物医药等领域具有更广泛的应用。纤维新材料的发展具有高科技、高效能、高质量特征,亟需与物理、化学、生物、医学和信息技术等融合,开发具有高性能、多功能、更智能和可持续的纤维材料与器件,实现多功能耦合与杂化,满足未来产业的应用需求。

关键词：战略新兴产业未来产业纤维材料中国科协电子信息人工智能信息技术航空航天

Introduction of State Key Laboratory for Modification of Chemical Fibers and Polymer Materials (SKLFPM)

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Advanced Fiber Materials 2022年第6期4卷 1291-1292页

作者： meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University201620 ShanghaiChina

Fiber materials are essential to national economic growth,people’s livelihoods,and social *** have been widely used in clothing,aerospace,energy devices,flexible electronics,tissue engineering,and many other *** chemical fiber industry of China was underdeveloped before the early 1980s,and even could not produce enough chemical fiber products for clothing.

关键词： enough electronics industry

Scalable carbon black deposited fabric/hydrogel composites for affordable solar-driven water purification

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Journal of Materials Science & Technology 2022年第11期106卷 10-18页

作者： Ying Guo Congqi Li Peiling Wei Kai Hou meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Interfacial solar-driven evaporators have presented great potential for water purification owing to their low energy consumption and high steam generation efficiency. However, their further applications are hindered by the high costs and complicated fabrication processes. Here, a scalable bilayer interfacial evaporator was constructed via an affordable technique, in which carbon black deposited nonwoven fabric(CB@NF) was employed as the upper photothermal layer, as well as PVA/starch hybrid hydrogel for selffloating and water transport. Under simulated one sun irradiation, CB@NF layer displayed excellent photothermal conversion performance, whose temperature could increase 30.4 ℃ within 15 min. Moreover,the introduction of starch into PVA endowed the hybrid hydrogels with considerable water-absorption capability on the premise of ensuring mechanical properties. The resultant CB@NF/PVA/starch composites achieved superior interfacial adhesion performance with interfacial toughness at about 200 J *** with good evaporation performance, salt-rejection property and high purification efficiency on pollutants, this evaporation system would become a promising candidate to alleviate water shortage.

关键词： Fabric/hydrogel composite Interfacial solar-driven evaporation Water purification

Snakeskin‑Inspired Hierarchical Winkled Surface for Ultradurable Superamphiphobic Fabrics via Short‑Fluorinated Polymer Reactive Infusion

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Advanced Fiber Materials 2023年第2期5卷 543-553页

作者： Mingqing Yu Wei Lyu Yaozu Liao meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials&College of Materials Science and Engineering Donghua UniversityShanghai 21620China

Durable superamphiphobic surfaces are highly desired for real-world applications such as self-cleaning,anti-fouling,personal protection,and functional ***,challenges still exist in constructing robust superamphiphobic surfaces by using short-fluorinated polymers as one of the promising alternatives for environmentally unfriendly long perfluorinated side-chain *** patterns on biological skins endow the creatures with a specific surface for ***,a facile strategy was proposed to generate hierarchical wrinkles for ultradurable superamphiphobic fabrics by simulating the deformation adaptability of ***-like hierarchical winkling was constructed by the infusion of reactive perfluorooctyltriethoxysilane(FOS)in a wet chemical plus vapor polymerization *** the infusion of FOS,the mismatch of shrinkage caused by gradient crosslinking leads to the formation of a soft wrinkled poly(perfluorooctyl trieth-oxysilane)(poly-FOS)*** a snakeskin-like hierarchical wrinkled surface and high fluorine density of poly-FOS endowed the treated superamphiphobic fabrics with high water resistance(contact angle 169°),castor oil resistance(154°),and extraordinary durability(withstanding 100 standard laundries,15,000 rubbing cycles and strong acid and alkali solu-tions).Moreover,a superamphiphobic surface can be formed on various substrates,including fabric,wood,paper,and *** work thus gives new insights into the environmentally friendly manufacture of ultradurable superamphiphobic fabrics.

关键词： Superamphiphobicity Short-fluorinated polymer Hierarchical wrinkled surface Ultradurable Gradient crosslinking

Fiber Electronics Bring a New Generation of Acoustic Fabrics

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Advanced Fiber Materials 2022年第3期4卷 321-323页

作者： Shaowu Pan meifang zhu State Key Laboratory for Modifcation of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Acoustic fabrics have traditionally been served as sound absorbers,dissipating sound signals into unusable *** innovative electronic fber woven into an elaborately designed fabric enables an unprecedented acoustic *** useful applications in sound direction identifcation,acoustic communications and heart sound auscultation illustrate a wide spectrum of unforeseen opportunities of the considerable technology.

关键词： Acoustic technology. sound

用于纤维基可穿戴传感器和电致发光器件的多功能石墨烯/聚电解质水性分散液

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Science China Materials 2024年第6期67卷 1915-1925页

作者：缪振宇余柔会白晓文杜相恒杨中华周涛朱美芳潘绍武 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

导电分散液是构建用于可穿戴传感器、能源和柔性显示器件中导电纤维/织物的关键组成部分.尽管石墨烯具有稳定的化学性质和高电导性,但制备与纤维/织物材料兼容的石墨烯分散液仍然具有挑战性.本研究通过引入聚苯乙烯磺酸钠(PSS)分散剂,... 详细信息

导电分散液是构建用于可穿戴传感器、能源和柔性显示器件中导电纤维/织物的关键组成部分.尽管石墨烯具有稳定的化学性质和高电导性,但制备与纤维/织物材料兼容的石墨烯分散液仍然具有挑战性.本研究通过引入聚苯乙烯磺酸钠(PSS)分散剂,成功制备了环境友好且稳定的石墨烯水性分散液.PSS通过非共价作用改性石墨烯,使其表面带负电荷,由此产生的静电排斥促进了石墨烯的稳定分散.此外,PSS还有助于石墨烯与基底之间形成牢固的粘附.我们制备了基于石墨烯改性的纤维和纤维膜的柔性机械传感器,包括可拉伸应变传感器和压力传感器;其中,应变传感器具有100%的高拉伸性和144.6的灵敏度,也能够感知0.1%的小应变.此外,制备的柔性生理电极能够长时间记录肌电信号和心电信号.作为概念验证,制备的同轴电致发光纤维能够为潜艇模型提供照明,以完成水下复杂任务.这项工作将进一步推动先进纳米材料在可穿戴领域的应用.

关键词： graphene dispersion fibers mechanical sensors wearable display