Polypyrrole-Coated Zein/Epoxy Ultrafine Fiber Mats for Electromagnetic Interference Shielding  

作　　者：丁润龙 戚瑞瑞 刘飞 刘万双 张礼颖 蒋秋冉 DING Runlong;QI Ruirui;LIU Fei;LIU Wanshuang;ZHANG Liying;JIANG Qiuran(Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China;College of Textiles,Donghua University,Shanghai 201620,China;Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China;Shanghai Collaborative Innovation Center of High Performance Fibers and Composites(Province-Ministry Joint),Donghua University,Shanghai 201620,China)

机构地区：[1]Key Laboratory of Textile Science&Technology,Ministry of Education,Donghua University,Shanghai 201620,China [2]College of Textiles,Donghua University,Shanghai 201620,China [3]Center for Civil Aviation Composites,Donghua University,Shanghai 201620,China [4]Shanghai Collaborative Innovation Center of High Performance Fibers and Composites(Province-Ministry Joint),Donghua University,Shanghai 201620,China

出　　处：《Journal of Donghua University(English Edition)》2023年第4期351-356,共6页东华大学学报（英文版）

基　　金：Fundamental Research Funds for the Central Universities,China(No. 2232022D-13);Fundamental Research Funds of Shanghai Collaborative Innovation Center of High Performance Fibers and Composites (Province-M inistry Joint),China(No. X12812101/015)。

摘　　要：To reduce the environmental pollution and meet the needs for wearable electronic devices, new requirements for electromagnetic interference(EMI) shielding materials include flexibility, biodegradability, and biocompatibility. Herein, we reported a polypyrrole-coated zein/epoxy(PPy/ZE) ultrafine fiber mat which was inherently biodegradable and skin-friendly. In addition, it could maintain its ultrafine fibrous structure after coating, which could provide the mat with mechanical compliance, high porosity, and a large specific area for high EMI shielding. With the assistance of the epoxide cross-linking, the breaking stresses of the PPy/ZE fiber mats could achieve 3.3 MPa and 1.4 MPa and the strains were 40.1% and 83.0% in dry and wet states, respectively, which met the needs of various wearable electronic devices. Along with the extension in the PPy treatment duration, more PPy was loaded on the fiber surfaces, which formed more integrated and conductive paths to generate increasing conductivities up to 401.76 S·m^(-1). Moreover, the EMI shielding performance was raised to 26.84 dB. The biobased mats provide a green and efficient choice for EMI shielding materials, which may be a promising strategy to address EMI problems in multiple fields.

关 键 词：polypyrrole(PPy) ZEIN ultrafine fiber mat electromagnetic interference(EMI)shielding electrical conductivity 

分 类 号：TQ341.5[化学工程—化纤工业]