材料科学
电磁屏蔽
电磁干扰
碳化硅
复合材料
电磁干扰
多孔性
碳纳米管
电气工程
工程类
作者
Chengqing Tang,Sheng Zhang,Jiapeng Zhang,Xiaohua Zhang,Zhi Hong Hang,Yitan Li,Zhaohui Yang
标识
DOI:10.1016/j.cej.2023.144011
摘要
Electromagnetic interference (EMI) shielding materials with high thermal resistivity, lightweight and flexibility have been intensively demanded to protect precision electronic instruments in various cutting-edge fields. Herein, using a low-temperature growth strategy, we successfully constructed a carbon nanotube (CNT) @ silicon carbide (SiC) coaxial 3D porous composite sponge with comprehensive outstanding performances, including low density of 15–32 mg·cm−3; super elasticity with high shape-recovery of 95 % at compression strain of 96 %; reversible compression-release stability with shape retention of 86 % and stress retention of 85 % after 1000 loading–unloading cycles; excellent thermal resistivity of over 1000 °C in Argon or 700 °C in Air; eye-catching EMI shielding performance with EMI shielding effectiveness of up to 75.7 ± 6 dB in X-band which, to the best of our knowledge, is the highest value for silicon carbide (SiC) based porous EMI shielding materials. Our results not only provide guidance for the further development of the next-generation EMI shielding materials under extreme conditions, but also cast a light to explore fundamental mechanisms behind porous EMI shielding materials.
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