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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

Micromechanical interlocking-inspired dendritic porous silicabased multimodal resin composites for the tooth restoration

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Nano Research 2024年第10期17卷 9065-9077页

作者： Hongyan Chen Junjun Wang Shi Yin Ruili Wang Xinquan Jiang meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Material Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Engineering Research Center of Advanced Dental Technology and Materials Shanghai Key Laboratory of StomatologyShanghai Research Institute of StomatologyNational Clinical Research Center for Oral DiseasesShanghai Ninth People’s HospitalCollege of StomatologyShanghai Jiao Tong University School of MedicineShanghai 200011China

Porous silica particles have shown great potential application as reinforcing fillers in the field of dentistry due to their ability to construct the micromechanical interlocking effect at filler-matrix ***,how to accurately regulate the pore structure,especially the pore size,to increase the degree of the micromechanical interlocking and the performance of materials remains a ***,we have proposed a facile self-assembly process to synthesize dendritic porous silica with tunable pore sizes(DPS-x)by adjusting the chain-length of the alcohols in the *** mechanism of nucleation-growth is further put *** results indicate that the pore size of DPS-x indeed affects the mechanical property of composites,where the DPSpen particles with intermediate pore size are chosen as the optimal reinforcing *** bimodal and multimodal filler formulations are further established to address the loading limitation of unimodal DPS-pen(46 wt.%).In virtue of the closepacked structure of identical spheres,the particle sizes of secondary silica embedded into the maximally loaded bimodal D3S7 composite(DPS-pen:Si430=30:70,w/w)are theoretically calculated without *** all formulations,the developed multimodal D3S7+Si178+Si90 filler exhibits superior mechanical properties,the lowest shrinkage,and high polymerization conversion for dental composites,along with satisfied waster sorption and solubility,and good biocompatibility in vitro and in vivo,which are comparable to commercial composite Z350 XT(3M,USA).These DPS-x particles and their multimodal fillers can also be applied to other polymer-based biomaterials.

关键词： porous silica pore size multimodal filler dental composite physicochemical properties biosafety

A Skin-Inspired Self-Adaptive System for Temperature Control During Dynamic Wound Healing

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Nano-Micro Letters 2024年第8期16卷 211-224页

作者： Yaqi Geng Guoyin Chen Ran Cao Hongmei Dai Zexu Hu Senlong Yu Le Wang Liping zhu Hengxue Xiang meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620People’s Republic of China

The thermoregulating function of skin that is capable of maintaining body temperature within a thermostatic state is ***,patients suffering from skin damage are struggling with the surrounding scene and situational ***,we report an interactive self-regulation electronic system by mimicking the human thermos-reception *** skin-inspired self-adaptive system is composed of two highly sensitive thermistors(thermal-response composite materials),and a low-power temperature control unit(Laserinduced graphene array).The biomimetic skin can realize self-adjusting in the range of 35–42℃,which is around physiological *** thermoregulation system also contributed to skin barrier formation and wound *** wound models,the treatment group healed~10%more rapidly compared with the control group,and showed reduced inflammation,thus enhancing skin tissue *** skin-inspired self-adaptive system holds substantial promise for nextgeneration robotic and medical devices.

关键词： Thermo-reception Self-regulation Flexible electronic system Wound healing

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

In-situ forming ultra-mechanically sensitive materials for high-sensitivity stretchable fiber strain sensors

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National Science Review 2024年第6期11卷 254-263页

作者： Rouhui Yu Changxian Wang Xiangheng Du Xiaowen Bai Yongzhong Tong Huifang Chen Xuemei Sun Jing Yang Naoji Matsuhisa Huisheng Peng meifang zhu Shaowu Pan State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University MOE Key Lab of Disaster Forecast and Control in Engineering School of Mechanics and Construction Engineering Jinan University State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Institute of Fiber Materials and Devices Fudan University Department of Cardiology Shanghai Xuhui Central HospitalZhongshan-Xuhui Hospital Fudan University Research Center for Advanced Science and Technology and Institute of Industrial Science The University of Tokyo

Fiber electronics with flexible and weavable features can be easily integrated into textiles for wearable applications. However, due to small sizes and curved surfaces of fiber materials, it remains challenging to load robust active layers, thus hindering production of high-sensitivity fiber strain sensors. Herein, functional sensing materials are firmly anchored on the fiber surface in-situ through a hydrolytic condensation *** anchoring sensing layer with robust interfacial adhesion is ultra-mechanically sensitive, which significantly improves the sensitivity of strain sensors due to the easy generation of microcracks during stretching. The resulting stretchable fiber sensors simultaneously possess an ultra-low strain detection limit of 0.05%, a high stretchability of 100%, and a high gauge factor of 433.6, giving 254-folds enhancement in sensitivity. Additionally, these fiber sensors are soft and lightweight, enabling them to be attached onto skin or woven into clothes for recording physiological signals, e.g. pulse wave velocity has been effectively obtained by them. As a demonstration, a fiber sensor-based wearable smart healthcare system is designed to monitor and transmit health status for timely intervention. This work presents an effective strategy for developing high-performance fiber strain sensors as well as other stretchable electronic devices.

关键词： fiber strain sensor stretchable wearable healthcare

Structural design of light-emitting fibers and fabrics for wearable and smart devices

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Science Bulletin 2024年第15期69卷 2439-2455页

作者： Xiaoxiao Yu Linfeng Chen Junyan Zhang Wei Yan Theo Hughes-Riley Yanhua Cheng meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China Nottingham Trent University Nottingham NG14GGUnited Kingdom

Flexible light-emitting fibers and fabrics serve to bridge human–machine interactions. The desire for practical applications and the commercialization of flexible light-emitting fibers has accelerated structural progress and improvements. This review focuses on the structural design of light-emitting fibers and fabrics, starting with a summary of design principles, emission mechanisms, and structural evolution of coaxial structured light-emitting fibers. Subsequently, we explore recent advances in the helical structure design strategies that boost the mechanical sensitivity of light-emitting fibers. Following that, we analyze continuous preparation processes and the development of large-area intelligent light-emitting fabrics based on interwoven structures. Examples based on stiff and rigid inorganic-based lightemitting diodes integrated into flexible systems are also presented. Finally, we discuss the current challenges and future opportunities for light-emitting applications in the field of wearable and smart devices.

关键词： Light-emitting fiber Structure design Wearable electronic Flexible optoelectronic fiber Large-scale fabric Electronic textile

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

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

Structure design for high performance n-type polymer thermoelectric materials

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Chinese Physics B 2022年第2期31卷 33-43页

作者： Qi Zhang Hengda Sun meifang zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Organic thermoelectric(OTE)materials have been regarded as a potential candidate to harvest waste heat from complex,low temperature surfaces of objects and convert it into ***,n-type conjugated polymers as organic thermoelectric materials have aroused intensive research in order to improve their performance to match up with their ptype *** this review,we discuss aspects that affect the performance of n-type OTEs,and further focus on the effect of planarity of backbone on the doping efficiency and eventually the TE *** then summarize strategies such as implementing rigid n-type polymer backbone or modifying conventional polymer building blocks for more planar *** the outlook part,we conclude forementioned devotions and point out new possibility that may promote the future development of this field.

关键词： organic thermoelectrics conducting polymers organic semiconductor doping