Flexible microwave absorbing fabrics woven by high-strength graphene-based hybrid fibers with broadband electromagnetic response  

作　　者：Jingyuan Tang Tian Li Qian Liu Jiani Du Jiatong Li Qing Qi Fanbin Meng 

机构地区：[1]Key Laboratory of Advanced Technologies of Materials(Ministry of Education),School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Journal of Materials Science & Technology》2024年第33期93-103,共11页材料科学技术(英文版)

基　　金：supported by the National Nat-ural Science Foundation of China(NSFC,Nos.51903213 and 5217130190);the Science and Technology Planning Project of Sichuan Province(Nos.2023NSFSC1952 and 2022ZYD0028);the Central Government Guides the Local Science and Technology De-velopment Special Funds(No.2021Szvup124);the Fundamen-tal Research Funds for the Central Universities(Nos.2682021GF004 and 2682022CG005)to freely explore basic research projects.

摘　　要：Fabrics,a class of carriers,have been pioneered in electromagnetic protection,but their microwave absorbing potential has not been fully explored for a considerable period.Herein,aramid nanofibers(ANFs)enhanced reduced graphene oxide fabrics(ANF/rGO fabrics)were synthesized by wet spinning-chemical reduction.The ANF/rGO fabrics can achieve the minimum reflection loss(RLmin)of−15.8 dB with a thickness of 2.7 mm.On this basis,ANF/rGO fabrics grown with polyaniline(ANF/rGO-PANi fabrics)through in-situ doping polymerization were obtained.Polyaniline compensates for the lack of conductivity of the dielectric fabrics,bringing higher impedance matching and attenuation capability.The corresponding RLmin can reach−52.3 dB under 2.9 mm and the effective absorption bandwidth(EAB)increases to 6 GHz covering the whole Ku band under 2.5 mm.The fabrics woven by high-strength graphene-based hybrid fibers proposed in this study provide a new angle to achieve high-efficiency microwave absorption.

关 键 词：Strong and tough graphene-based fibers Aramid nanofibers Microwave absorbing fabrics Microwave absorption mechanism 

分 类 号：TB3[一般工业技术—材料科学与工程]