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Hierarchical construction of CNT networks in aramid papers for high-efficiency microwave absorption

查看全文 作　　者：You [1]Wu;Li [2]Chen;Yixuan [3]Han;Panbo [3]Liu;Haihong [1]Xu;Guanze [1]Yu;Yingying [4]Wang;Tao [4]Wen;Wenbo [1]Ju;Junwei [3]Gu 高影响力作者 机构地区：[1]School of Physics and Optoelectronics,South China University of Technology,Guangzhou 510640,China;[2]School of Light Industry and Engineering,South China University of Technology,Guangzhou 510640,China;[3]Shaanxi Key Laboratory of Macromolecular Science and Technology,School of Chemistry and Chemical Engineering,Northwestern Polytechnical University,Xi’an 710072,China;[4]School of Emergent Soft Matter,South China University of Technology,Guangzhou 510640,China高影响力机构 出　　处：《Nano Research》索引2023年第16卷第5期,共9页高影响力期刊 基　　金：the National Natural Science Foundation of China(No.U21A2093). 摘　　要：Carbon nanotubes(CNTs)incorporated polymeric composites have been extensively investigated for microwave absorption at target frequencies to meet the requirement of radar cross-section reduction.In this work,a strategy of efficient utilization of CNT in producing CNT incorporated aramid papers is demonstrated.The layer-by-layer self-assembly technique is used to coat the surfaces of meta-aramid fibers and fibrils with CNT,providing novel raw materials available for the large-scale papermaking.The hierarchical construction of CNT networks resolves the dilemma of increasing CNT content and avoiding the agglomeration of CNT,which is a frequent challenge for CNT incorporated polymeric composites.The composite paper,which contains abundant heterogeneous interfaces and long-range conductive networks,is capable of reaching a high permittivity and dielectric loss tangent at a low CNT loading,its complex permittivity is,so far,adjustable in the range of(1.20−j0.05)to(25.17−j18.89)at 10 GHz.Some papers with optimal matching thicknesses achieve a high-efficiency microwave absorption with a reflection loss lower than−10 dB in the entire X-band. 关 键 词：layer-by-layer self-assembly aramid fiber carbon nanotube(CNT) composite paper radar absorbing materials
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