首页|Flexible microwave absorbing fabrics woven by high-strength graphene-based hybrid fibers with broadband electromagnetic response
Flexible microwave absorbing fabrics woven by high-strength graphene-based hybrid fibers with broadband electromagnetic response
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Fabrics,a class of carriers,have been pioneered in electromagnetic protection,but their microwave ab-sorbing 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 thick-ness 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 correspond-ing 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.
Strong and tough graphene-based fibersAramid nanofibersMicrowave absorbing fabricsMicrowave absorption mechanism
Key Laboratory of Advanced Technologies of Materials(Ministry of Education),School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu 610031,China
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