由碳纤维毡支撑的3D热网络用于提高CF/C/环氧复合材料的热性能

3D Thermal Network Supported by CF Felt for Improving the Thermal Performance of CF/C/Epoxy Composites.

作者信息

Wu Xinfeng, Gao Yuan, Jiang Tao, Zheng Lingyu, Wang Ying, Tang Bo, Sun Kai, Zhao Yuantao, Li Wenge, Yang Ke, Yu Jinhong

机构信息

College of Ocean Science and Engineering and Merchant Marine College, Shanghai Maritime University, Shanghai 201306, China.

School of Materials Science and Engineering, Central South University, Changsha 410083, China.

出版信息

Polymers (Basel). 2021 Mar 23;13(6):980. doi: 10.3390/polym13060980.

The heat generated by a high-power device will seriously affect the operating efficiency and service life of electronic devices, which greatly limits the development of the microelectronic industry. Carbon fiber (CF) materials with excellent thermal conductivity have been favored by scientific researchers. In this paper, CF/carbon felt (CF/C felt) was fabricated by CF and phenolic resin using the "airflow network method", "needle-punching method" and "graphitization process method". Then, the CF/C/Epoxy composites (CF/C/EP) were prepared by the CF/C felt and epoxy resin using the "liquid phase impregnation method" and "compression molding method". The results show that the CF/C felt has a 3D network structure, which is very conducive to improving the thermal conductivity of the CF/C/EP composite. The thermal conductivity of the CF/C/EP composite reaches 3.39 W/mK with 31.2 wt% CF/C, which is about 17 times of that of pure epoxy.

高功率器件产生的热量会严重影响电子设备的运行效率和使用寿命，这极大地限制了微电子工业的发展。具有优异导热性的碳纤维（CF）材料受到了科研人员的青睐。本文采用“气流成网法”“针刺法”和“石墨化工艺法”，用CF和酚醛树脂制备了CF/碳毡（CF/C毡）。然后，采用“液相浸渍法”和“模压法”，用CF/C毡和环氧树脂制备了CF/C/环氧树脂复合材料（CF/C/EP）。结果表明，CF/C毡具有三维网络结构，这非常有利于提高CF/C/EP复合材料的导热性。当CF/C含量为31.2 wt%时，CF/C/EP复合材料的导热率达到3.39 W/mK，约为纯环氧树脂的17倍。