Versatile and Comfortable Janus Fabrics for Switchable Personal Thermal Management and Electromagnetic Interference Shielding  

作　　者：Mingxin Feng Shuangjiang Feng Tianrui Yu Shengyin Zhu Haoran Cai Xu He Yanmei Liu Man He Xiaohai Bu Jun Huang Yuming Zhou 

机构地区：[1]School of Chemistry and Chemical Engineering,Southeast University,Jiangsu Optoelectronic Functional Materials and Engineering Research Center,Nanjing 211100,Jiangsu Province,China [2]School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing 211167,Jiangsu Province,China [3]Jiangsu Key Laboratory of Coating Functional Film and Technology,Jiangsu Sidike New Materials Technology Co.,Ltd,Suqian 223900,Jiangsu Province,China

出　　处：《Advanced Fiber Materials》2024年第3期911-924,共14页先进纤维材料（英文）

基　　金：the financial support of the National Nature Science Foundation of China(52173158 and 32171725);Outstanding Youth Foundation of Jiangsu Province(BK20200107);Industrial prospect and key technology competition projects in Jiangsu Province(BE2021081);Postgraduate Research&Practice Innovation Program of Jiangsu Province(KYCX21_0091);Postgraduate Practical Innovation Program of Jiangsu Province(SJCX22_0056).

摘　　要：Existing personal thermal regulating fabrics fall short of meeting the demands for sustainable and protective outdoor temperature management.Here,a versatile and comfortable Janus fabric has been developed by embedding boron nitride nanosheets within a porous polyurethane matrix(BNNS@TPU)and introducing Ti3C2Tx MXene into another layer of TPU pores(MXene/TPU).The well-distributed BNNS in porous TPU matrix enhances refractive index difference,increases porosity and optimizes pore size distribution,resulting in an excellent solar reflectivity(R=94.22%),while the distinct distribution of MXene in porous TPU effectively improves solar absorptivity(α=93.57%)and enhances the conduction loss of electromagnetic waves due to multiple scattering and reflection effects.With a simple flip,Janus fabric can switch between sub-ambient cooling of~7.2℃ and super-ambient heating of~46.0℃ to adapt to changing weather and seasonal conditions.The fabric achieves an electromagnetic interference shielding efficiency of 36 dB,protecting the human body from electromagnetic radiation,attributed to the hierarchical distribution of highly conductive MXene.Furthermore,Janus fabric offers excellent comfort,abrasion resistance,washability,and flame retardancy for practical wear.This study presents an effective strategy for developing personal thermal regulating fabrics with adaptability to environmental changes and resistance to electromagnetic radiation.

关 键 词：Radiative cooling Solar heating Personal thermal management Electromagnetic interference shielding WEARABILITY 

分 类 号：TS106[轻工技术与工程—纺织工程]