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[Materials Today Physics] Robust Ti3C2Tx MXene/starch derived carbon foam composites for superior EMI shielding and thermal insulation
作者:Fengqi Qi#, Lei Wang#, Yali Zhang, Zhonglei Ma*, Hua Qiu and Junwei Gu
關鍵字:Electromagnetic interference shielding,MXene,MXene/polymer composites,Research progress
論文來源:期刊
具體來源:Materials Today Physics
發表時間:2021年
Lightweight and robust electromagnetic interference (EMI) shielding materials are highly desirable in high-end precision electronic components and 5G communication system. Herein, the starch based porous carbon foam (PCF) is prepared by yeast fermentation, steam foaming and carbonization approach with flour as raw material. And the Ti3C2Tx MXene/PCF (MPCF) composites are then fabricated via vacuum assisted impregnation of Ti3C2Tx MXene followed by freeze drying. The obtained PCF carbonized at 1400°C presents excellent compression strength of 4.9 MPa and superior electrical conductivity (σ) of 21.8 S/cm, respectively. The corresponding MPCF composites with 8.5 wt% Ti3C2Tx MXene exhibit superior EMI shielding effectiveness (EMI SE) and specific shielding effectiveness (SSE, EMI SE/ρ) of 75 dB and 216.9 dB·cm3/g, respectively. Meanwhile, the MPCF composites possess excellent flame retardancy and outstanding heat insulation, and can be applied in the extreme environment. The resultant lightweight, robust and multifunctional MPCF composites with simple fabrication processes show broad application prospects for EMI shielding system in aerospace, military engineering, electrical and electronics fields.
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