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Recent Advances in Ultrafine Fibrous Materials for Effective Warmth Retention

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Advanced Fiber Materials 2023年第3期5卷 847-867页

作者： Sai Wang Cheng Liu Fei Wang Xia Yin Jianyong Yu Shichao Zhang Bin Ding Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 201620China

Extremely cold environment has led to a variety of serious public health issues and posed huge burden on the social econ-omy,which is an urgent challenge to the human worldwide.Featured with comfort,convenience,and cost-effectiveness,fibrous materials have been selected as heat insulation materials to protect the human body against the cold for centuries.The advanced ultrafine fibers,with remarkable softness,small average diameter and pore size,and high porosity,have found extensive attention,as promising candidate for application in reducing the heat loss.In this review,the heat transfer mechanisms for single fiber and fiber assembly are provided,and the typical categories of ultrafine fibrous materials for warmth retention,classified as fibrous membrane and fibrous sponge in terms of aggregate structures,are systematically summarized.In particular,this review comprehensively discusses the fabrication strategies,structure characteristics,and significant properties of various ultrafine fibrous materials.Finally,the current challenges and future development prospects of ultrafine fibrous materials for effective warmth retention are highlighted.

关键词： Ultrafine fibers Membranes Sponges Warmth retention

From 1D Nanofibers to 3D Nanofibrous Aerogels: A Marvellous Evolution of Electrospun SiO_(2) Nanofibers for Emerging Applications

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维普期刊数据库

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Nano-Micro Letters 2022年第12期14卷 40-78页

作者： Cheng Liu Sai Wang Ni Wang Jianyong Yu Yi-Tao Liu Bin Ding Innovation Center for Textile Science and Technology College of TextilesDonghua UniversityShanghai 201620People’s Republic of China

One-dimensional(1D)SiO_(2) nanofibers(SNFs),one of the most popular inorganic nanomaterials,have aroused widespread attention because of their excellent chemical stability,as well as unique optical and thermal characteristics.Electrospinning is a straightforward and versatile method to prepare 1D SNFs with programmable structures,manageable dimensions,and modifiable properties,which hold great potential in many cutting-edge applications including aerospace,nanodevice,and energy.In this review,substantial advances in the structural design,controllable synthesis,and multifunctional applications of electrospun SNFs are highlighted.We begin with a brief introduction to the fundamental principles,available raw materials,and typical apparatus of electrospun SNFs.We then discuss the strategies for preparing SNFs with diverse structures in detail,especially stressing the newly emerging three-dimensional SiO_(2) nanofibrous aerogels.We continue with focus on major breakthroughs about brittleness-to-flexibility transition of SNFs and the means to achieve their mechanical reinforcement.In addition,we showcase recent applications enabled by electrospun SNFs,with particular emphasis on physical protection,health care and water treatment.In the end,we summarize this review and provide some perspectives on the future development direction of electrospun SNFs.

关键词： SiO_(2)nanofibers Nanofibrous aerogels Structural design Mechanical reinforcement Multifunctional applications

高灵敏度,超宽响应范围,环境耐受性高的多模式离子凝胶基传感器

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science China Materials 2023年第5期66卷 1899-1910页

作者：铁建飞毛志平张琳萍钟毅隋晓锋徐红 Key Lab of science and technology of Eco-textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyInnovation Center for Textile Science and TechnologyDonghua UniversityShanghai 201620China National Manufacturing innovation center of Advanced Dyeing and Finishing technology Taian 271000China

近年来,离子类皮肤传感器因其高性能和良好的兼容性等优点而备受关注.然而,开发一种多功能、稳定、高灵敏度和耐用的离子类皮肤传感器仍面临挑战.本文通过简单的紫外引发聚合制备了具有良好耐用性、环境(抗冻、耐真空)稳定性、离子导电... 详细信息

近年来,离子类皮肤传感器因其高性能和良好的兼容性等优点而备受关注.然而,开发一种多功能、稳定、高灵敏度和耐用的离子类皮肤传感器仍面临挑战.本文通过简单的紫外引发聚合制备了具有良好耐用性、环境(抗冻、耐真空)稳定性、离子导电性、自愈性、高粘附性和拉伸性的复合离子凝胶.该离子凝胶可以组装为应变、压力和温度传感器,用于检测外部环境的变化.无论是作为应变传感器还是压力传感器,离子凝胶基传感器都具有高灵敏度(GF=14.7)、宽响应范围(1%-1600%)、快速响应时同(95.8 ms)、优异的稳定性和可重复性(1000次).因此,它不仅可以追踪关节运动,还可以监测细微的表情变化(皱眉).该离子凝胶还可以组装成敲击传感器和高精度书写板传感器,用于信息传递.此外,该传感器对温度变化具有较高的灵敏度,温度感知范围在0-120℃之间,且检测阈值较低(0.1℃).因此,基于离子凝胶的传感器有望应用于多功能电子和传感设备.

关键词： stretchability environmental tolerance high sensitivity wide range strain/temperature sensor

分级多孔碳纳米纤维用于高效太阳能驱动水净化

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中国科学:材料科学(英文版) 2023年第8期66卷 3310-3318页

作者：罗清亮羊燚汪康康俞建勇王荣武季东晓覃小红 Key Laboratory of textile science and technology of Ministry of Education College of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

碳材料通常用于太阳能水蒸发,因为它们可以吸收宽带光并有效地产生热量.然而,具有光滑表面的传统碳材料受到大约10%的中等反射的限制,损失了反射能量.在此,我们提出了一种多界面策略,以提高碳纳米纤维(CNFs)的固有光吸收,从而实现更高... 详细信息

碳材料通常用于太阳能水蒸发,因为它们可以吸收宽带光并有效地产生热量.然而,具有光滑表面的传统碳材料受到大约10%的中等反射的限制,损失了反射能量.在此,我们提出了一种多界面策略,以提高碳纳米纤维(CNFs)的固有光吸收,从而实现更高效的太阳能驱动水净化.通过简单的牺牲模板方法,在CNFs中引入分级孔来构建多个界面得到高表面粗糙度碳纳米纤维(HPCNFs).由于高表面粗糙度和源自分级孔的丰富内部空气介电界面,HPCNFs在宽带光(300–2500 nm)吸收显著改善,高达97.62%,这使得在1个太阳光照下的太阳光转换为蒸汽的效率达到96.13%,蒸发率高达1.78 kg m^(-2)h^(−1),超过了大多数相关的纯碳材料.当用于太阳能水蒸发脱盐时,HPCNF膜表现出对离子的高度排斥(<0.05 mg L^(−1)盐离子),并以每天11.18 kg m^(-2)的速率从湖中产生淡水,足以满足4–5个人的日常需求.这项工作为高效碳基太阳能水蒸发材料的设计提供了一种简便策略.

关键词：牺牲模板碳纳米纤维表面粗糙度水净化蒸发材料碳材料光滑表面水蒸发

可拉伸和高取向有机/无机复合纳米纤维膜用于多方向应变传感器和光驱动热电器件

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science China Materials 2023年第2期66卷 707-715页

作者：王黎明何昕阳郝云娜郑茂荣王荣武俞建勇覃小红 Key Laboratory of textile science&technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

静电纺丝技术是制备纳米纤维膜的一种有效、简易方法,广泛用于基于能量收集的可穿戴电子器件.然而,由于超低的性能以及难以建立稳定的温差,其在热电领域的应用鲜有报道.本文结合静电纺丝技术和表面涂层的方法设计了具有优异拉伸性能和... 详细信息

静电纺丝技术是制备纳米纤维膜的一种有效、简易方法,广泛用于基于能量收集的可穿戴电子器件.然而,由于超低的性能以及难以建立稳定的温差,其在热电领域的应用鲜有报道.本文结合静电纺丝技术和表面涂层的方法设计了具有优异拉伸性能和热电性能的高取向有机/无机复合纳米纤维膜.取向结构有利于载流子的快速传输,与无序结构的纳米纤维膜相比,其热电功率因子增加了7倍.此外,基于独特的取向纳米纤维结构,我们设计了新颖的辐射冷却-光热加热电极用于制备光驱动热电器件,为构建薄膜热电器件面内温差提供了一种新思路.而且,通过将两个高取向有机/无机复合纳米纤维膜正交堆叠,组装了用于识别人体关节复杂运动的多方向应变传感器.这些研究将推动静电纺纳米纤维基热电器件在下一代可穿戴电子器件领域的发展和应用.

关键词：取向纳米纤维纳米纤维膜应变传感器热电器件人体关节无序结构辐射冷却取向结构

ZrO_(2)纳米纤维的最新进展:从结构设计到新兴应用

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science China Materials 2023年第2期66卷 421-440页

作者：徐臻王斐印霞程隆棣俞建勇刘一涛丁彬 Key Laboratory of textile science&technology(Ministry of Education) College of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

一维二氧化锆纳米纤维(ZrO_(2)NFs)作为一种重要的无机材料,以其独特的结构特性、优异的化学/热稳定性,以及杰出的光学/电子性能而备受关注.生物模板法、相转化法、离心纺丝法和静电纺丝法是合成ZrO_(2)NFs的简便且高度通用的方法,在隔... 详细信息

一维二氧化锆纳米纤维(ZrO_(2)NFs)作为一种重要的无机材料,以其独特的结构特性、优异的化学/热稳定性,以及杰出的光学/电子性能而备受关注.生物模板法、相转化法、离心纺丝法和静电纺丝法是合成ZrO_(2)NFs的简便且高度通用的方法,在隔热、空气过滤、水净化、催化剂载体、染料敏化电池和锂离子电池等新兴应用领域具有巨大的潜力.本文对多孔、中空、层状、甚至三维自组装等多种结构的ZrO_(2)NFs的合成策略进行了详细的描述和分析.此外,本文还讨论了近年来打破陶瓷脆性、构建柔性ZrO_(2)NFs的革命性进展及其变形机制.接着介绍了ZrO_(2)NFs在隔热、环境修复、催化、电池等领域的应用成果.最后,我们提供了关于ZrO_(2)NFs的全面总结、关键挑战和未来展望.本文对未来新型ZrO_(2)NFs的研究具有一定的指导意义.

关键词：催化剂载体二氧化锆离心纺丝纳米纤维锂离子电池空气过滤生物模板法电子性能

Flexible, self-cleaning, and high-performance ceramic nanofiber-based moist-electric generator enabled by interfacial engineering

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science China(Technological sciences) 2022年第2期65卷 450-457页

作者： WANG LiMing FENG LanLan SUN Zhao Yang HE XinYang WANG RongWu QIN XiaoHong YU JianYong Key Laboratory of textile science&technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Due to their long-term stability, even under extreme conditions, oxide ceramics have attracted significant attention in emerging fields like moist-electric generation. However, the inherent brittleness and low voltage output of oxide ceramic-based moistelectric generators(MEGs) limit their applications in wearable electronics. Herein, a facile strategy involving the combination of sol-gel electrospinning and calcination is used to fabricate flexible and freestanding Ti O_(2)/Zr O_(2)(TZ) composite nanofiber-based MEGs. The excellent flexibility of the TZ nanofiber membranes can be attributed to the suppression of their crystal structure transformation, dispersion of stress concentration, and reduction of crack propagation via interfacial engineering. The porous structure of the electrospun nanofiber membrane features an abundance of charged narrow channels for the diffusion of water molecules and generates a streaming potential. The optimal voltage output reached ~0.8 V, which is the highest value reported for an oxide ceramic-based MEG. Furthermore, the as-fabricated nanofiber-based MEG exhibits good self-cleaning capability to degrade organic pollutants under ultraviolet irradiation. By integrating mechanical flexibility, high performance, and a selfcleaning effect, this work presents a new idea for exploring diverse, efficient, and wearable oxide ceramic-based MEGs.

关键词： moist-electric generation ceramic nanofiber electrospinning flexible self-cleaning

Controllable diameter of electrospun nanofibers based on the velocity of whipping jets for high-efficiency air filtration

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science China(Technological sciences) 2022年第2期65卷 481-489页

作者： LEI SaiLing WANG LiMing WANG RongWu QIN XiaoHong YU JianYong Key Laboratory of textile science&technology Ministry of EducationCollege of TextilesDonghua UniversityShanghai 201620China Innovation Center for Textile Science and Technology Donghua UniversityShanghai 201620China

Electrospun nanofibers are regarded as a promising candidate for filtration because of their prominent size effect.The precise control of nanofiber diameter is the key to the material’s outstanding filtration capability,but it remains a challenge.Herein,an electrohydrodynamic scaling model is established for the accurate prediction of fiber diameter based on the velocity of the whipping jet.In this model,the velocity reflects jet stretching and is tuned by adding salt.The theoretical predictions agree well with the experimental results.With the proposed diameter model,the filtration property of the membrane is significantly optimized by governing the fiber diameter.When the nanofiber is slenderized to 183 nm,an ultralight (0.521 g m;) membrane exhibits high filtration efficiency (99.93%) and low pressure drop (105.2 Pa) against ultrafine aerosol particles (≤0.26μm) under an airflow face velocity of 5.33 cm s^(-1).These findings demonstrate that the established surface charge-based diameter model provides an excellent platform to timely and accurately control the nanofiber diameter via the velocity of whipping jets for highefficiency air filtration.

关键词： electrospinning jet velocity fiber diameter filtration

Highly stretchable,durable,and breathable thermoelectric fabrics for human body energy harvesting and sensing

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Carbon Energy 2022年第4期4卷 621-632页

作者： Xinyang He Jia Shi Yunna Hao Mantang He Jiaxin Cai Xiaohong Qin Liming Wang Jianyong Yu Key Laboratory of textile science&technology Ministry of EducationCollege of TextilesDonghua UniversityShanghaiChina Innovation Center for Textile Science and Technology Donghua UniversityShanghaiChina

Stretchable thermoelectrics have recently attracted widespread attention in the field of self-powered wearable electronics due to their unique capability of harvesting body heat.However,it remains challenging to develop thermoelectric materials with excellent stretchability,durable thermoelectric properties,wearable comfort,and multifunctional sensing properties simultaneously.Herein,an advanced preparation strategy combining electrospinning and spraying technology is proposed to prepare carbon nanotube(CNT)/polyvinyl pyrrolidone(PVP)/polyurethane(PU)composite thermoelectric fabrics that have high air permeability and stretchability(~250%)close to those of pure PU nanofiber fabrics.Furthermore,PVP can not only improve the dispersion of CNTs but also act as interfacial binders between the CNT and the elastic PU skeleton.Consequently,both the electrical conductivity and the Seebeck coefficient remain unchanged even after bending 1000 times.In addition,self-powered sensors for the mutual conversion of finger temperature and language and detection of the movement of joints to optimize an athlete's movement state were successfully fabricated.This study paves the way for stretchable thermoelectric fabrics with fascinating applications in smart wearable fields such as power generation,health monitoring,and human–computer interaction.

关键词： air permeability carbon nanotubes durability self-powered sensors stretchable thermoelectrics