Ultrathin polyimide-based composites with efficient low-reflectivity electromagnetic shielding and infrared stealth performance  

作　　者：Xu Zhao Xinwei Tang Yunlong Qiao Shuangshuang Li Zihang Zhang Yezi Lu Mingyang Zhu Zaiyin Hu Lijuan Long Zicheng Wang Tianxi Liu 

机构地区：[1]The Key Laboratory of Synthetic and Biological Colloids,Ministry of Education,School of Chemical and Material Engineering,International Joint Research Laboratory for Nano Energy Composites,Jiangnan University,Wuxi 214122,China [2]Guizhou Aerospace Wujiang Electro-mechanical Equipment Co.,Ltd.,No.20-5,Dalian Road Aerospace Industrial Park,Huichuan District,Zunyi 563000,China [3]School of Materials and Architectural Engineering,Guizhou Normal University,Guiyang 550025,China

出　　处：《Nano Research》2024年第7期6700-6712,共13页纳米研究（英文版）

基　　金：National Natural Science Foundation of China(Nos.52373077,52003106,and 52161135302);the Research Foundation Flanders(No.G0F2322N);Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.SJCX23_1236);the Innovation Program of Shanghai Municipal Education Commission(No.2021-01-07-00-03-E00108).

摘　　要：Researching and manufacturing materials that possess both electromagnetic interference(EMI)shielding and infrared stealth capabilities is of great significance.Herein,an ultrathin polyimide-based nonwoven fabric with low-reflection EMI shielding/infrared stealth performance is successfully fabricated by in-situ loading of Fe_(3)O_(4)/Ag nanoparticles on the surface of polyimide(PI)fiber(PFA),and followed by bonding with a commercial Cu/Ni mesh.The synergistic assembly of PFA and Cu/Ni promotes the rational construction of hierarchical impedance matching,inducing electromagnetic waves(EMW)to enter the composite and be dissipated as much as possible.Meanwhile,the existence of Cu/Ni mesh on back of PFA facilitates the formation of electromagnetic resonance and destructive interference of EMW reflected from composite,leading to a lowerreflectivity(0.26)EMI shielding performance of 58 dB within 24–40 GHz at a thinner thickness(430μm).More importantly,the fluffy PFA nonwoven fabric and metal Cu/Ni mesh endow composite with good thermal insulation and low infrared emissivity,resulting in excellent infrared stealth performance in various environments.As a result,such excellent compatibility makes it possible to become a promising defense material to be applied in military tent for preventing electromagnetic and infrared radiation.

关 键 词：POLYIMIDE electromagnetic interference shielding low reflection infrared stealth 

分 类 号：TB383[一般工业技术—材料科学与工程]