Effects of Mixed Acid Functionalization on Electric and Thermal Conductivities of Carbon Nanotube/Epoxy Resin Composites
Wang Chuang1, Zhao Lang1, Jia Jing1, Wang Deyi1, Peng Zongren2
1. Institute of Intelligent Energy Technology Xi’an University of Technology Xi’an 710048 China; 2. State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an 710049 China
Abstract Epoxy resin is widely used in power equipment. The modification of epoxy resin by carbon nanotubes can effectively change its electric and thermal conductivities. In this paper, the epoxy resin was modified by mixed-acid functionalized multi-walled carbon nanotubes. The aspect ratio of carbon nanotubes decreased after treatment, so two kinds of carbon nanotubes with different aspect ratios were selected for comparison. One was carbon nanotubes before mixed acid treatment, and the other was carbon nanotubes with the same aspect ratio after mixed acid treatment. Comparing the electric and thermal conductivities of these three kinds of carbon nanotubes doped with epoxy resin, mixed acidification treatment is beneficial to the dispersion of carbon nanotubes. However, the decrease of the aspect ratio of carbon nanotubes and the interfacial layer formed between carbon nanotubes and epoxy resin are not conducive to the improvement of electric and thermal conductivities of composites. Therefore, in order to obtain better electric and thermal conductivities, the treatment method should be based on uniform dispersion, without reducing the aspect ratio, and at the same time reducing the influence of the interface between filler and matrix.
Wang Chuang,Zhao Lang,Jia Jing等. Effects of Mixed Acid Functionalization on Electric and Thermal Conductivities of Carbon Nanotube/Epoxy Resin Composites[J]. Transactions of China Electrotechnical Society, 2019, 34(zk2): 457-464.
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2019, Vol. 34 
