材料科学
复合材料
石墨
电磁屏蔽
热导率
热膨胀
热的
电化学
电极
化学
物理
物理化学
气象学
作者
Rong Zhang,Xiang Fang,Biao Zhou,Changjiang Xiao,Yibing Xie,Wuhou Fan,Qingting Liu,Xudong Fu,Shanwei Hu,Juan Wang,C.P. Wong
标识
DOI:10.1021/acsami.3c18502
摘要
Nowadays, the rapid development of electronic devices requires composites with high thermal conductivity and good electromagnetic shielding properties. The key challenge lies in the construction of high-performance conductive networks. Herein, an electrochemical expansion graphite foam (EEG) with a quasi-hyperbolic framework was prepared by an electrochemical expansion method, and then the epoxy resin (EP) was filled to fabricate the composites. The graphite plate was first electrochemically intercalated and then foamed, in which plasticization was caused by weak oxidation in intercalation and the quasi-hyperbolic framework was induced by foaming during expansion. These processes were characterized by Fourier transform infrared (FTIR), micro-Raman, X-ray photoelectron spectroscopy (XPS), and so on. Based on the highly efficient quasi-hyperbolic framework and high-quality graphite structure, the thermal conductivity of the composite reached 43.523 W/(m·K), and total electromagnetic interference (EMI) shielding (SET) reached 105 dB. The heat transfer behavior was simulated by finite element analysis (FEA) in detail. This method of preparing high thermal conductivity and electromagnetic shielding materials has a good application prospect.
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