Sweat-Driven Silk-yarn Switches Enabled by Highly Aligned Gaps for Air-conditioning Textiles  

作　　者：Zhe Yin Songlin Shi Xiaoping Liang Mingchao Zhang Quanshui Zheng Yingying Zhang 

机构地区：[1]Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education,Department of Chemistry,Tsinghua University,Beijing 100084,China [2]Center for Nano and Micro Mechanics,Tsinghua University,Beijing 100084,China [3]Department of Engineering Mechanics,School of Aerospace Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Advanced Fiber Materials》2019年第3期197-204,共8页先进纤维材料（英文）

基　　金：This work was supported by the NSF of China(51672153,51422204,21975141);the National Key Basic Research and Development Program(No.2016YFA0200103);the National Program for Support of Top-notch Young Professionals.

摘　　要：Smart textiles are attracting great interest.Particularly,air-conditioning textiles are highly desired for their merits in energy conservation and personal temperature/humidity management.Currently,air-conditioning textiles can be fabricated by two strategies.One uses infrared-radiation-adaptive materials,and the other uses moisture-responsive actuators that can regulate temperature and humidity simultaneously.Here,the fabrication of a silk-yarn switch comprising electrospun highly aligned nanofibers is reported and its application in air-conditioning textiles is demonstrated.Silk yarn rotates in contact with liquid,and can be recovered by drying.The different responses and wetting behaviors of the switch to H_(2)O and C_(2)H_(6)O is investigated.It is argued that alignment and surface hydrophilicity of nanofibers play important roles in this term.To elaborate,actuating trait is mainly controlled by reduction of the surface free energy of aligned silk nanofibers,during the wetting process.As proof of concept,the application of the sweat-driven silk-yarn switch in regulating the temperature/humidity of the human body is demonstrated in this work.Considering the large production,versatile processibility,and good biocompatibility,silk actuator may have practical applications in designing smart switches(or valves)for intelligent textiles,artificial muscles,and other application scenarios.

关 键 词：Silk fibroin Aligned gaps Yarn actuator Surface free energy Dynamic regulation 

分 类 号：TB3[一般工业技术—材料科学与工程]