材料科学
复合材料
电磁屏蔽
电磁干扰
电磁干扰
复合数
微观结构
聚合物
反射损耗
碳纳米管
电信
计算机科学
作者
Jing Chen,Yang Zhang,Haorong Li,Wenkai Feng,Xiping Gao,Dahu Yao,Hong Wu,Hui Wang,Tianyan You,Chang Lu,Xinchang Pang
标识
DOI:10.1021/acsami.4c04426
摘要
Green electromagnetic interference (EMI) shielding materials not only require high shielding effectiveness (SE) and low reflection but also need to be recyclable after damage; however, it is challenging to strike a balance in practice. Here, a polyacrylamide (PAM) composite composed of numerous chemically cross-linked PAM@carbon nanotube (cPAM@CNT) core-shell particles featuring rich wrinkled microstructures was prepared using an adsorption-drying-shrinking strategy. The wrinkled microstructures enable the incident electromagnetic waves (EMWs) to undergo attenuation within the composites, achieving an average EMI SE of 67.5 dB in the X band. Due to the hygroscopicity of hydrophobically associated PAM (hPAM, an adhesive for cPAM@CNTs core-shell particles), the average EMI SE of the composites further increased to 83.2 dB after exposure to 91% relative humidity for 24 h, with only a 2.7 dB low reflection. Additionally, the composites also demonstrated excellent Joule heating, photothermal performance, and recyclability, which exhibit substantial promise for advanced EMI shielding applications.
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