Micro-Control Simulation of Electro-Thermal Dissociation Characteristics of Carbon Nanotubes/Epoxy Resin Composites
Ni Xiaoru1, Wang Jian1, Wang Jingrui1, Li Qingmin1, Han Zhiyun2
1. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China; 2. School of Electrical Engineering Shandong University Jinan 250061 China
Abstract：The aging and dissociation of epoxy resin is one of the important factors affecting the safe operation of DC GIL equipment. Adding a certain mass fraction of nanoparticles can effectively regulate its thermal performance. Four crosslinked epoxy resin models have been established in this paper, including pure epoxy resin, non-capped, half-capped, and fully capped carbon nanotube/epoxy composite media models. Based on the reaction force field ReaxFF, reaction molecular dynamics simulations of electron-thermal dissociation were performed on the four media models using the LAMMPS software. The results show that during the dissociation process, the initial dissociation temperature of the carbon nanotube/epoxy composite medium model is increased, the number of normalized molecules is reduced by about 15%, and the number and type of small molecule products produced also are decreased. During the electron-thermal dissociation process, the temperature dominates, thermal dissociation mainly occurs. The presence of electrical stress causes polar molecules and groups to move in the direction of the electric field. Carbon nanotubes improve the thermal stability of the epoxy resin to a certain extent, and alleviate the electro-thermal aging process. The effect of the non-capped and half-capped carbon nanotube composite medium models is more significant, which can provide an auxiliary design method for the micro-control of epoxy composite media.
倪潇茹, 王健, 王靖瑞, 李庆民, 韩智云. 碳纳米管对环氧树脂复合介质电-热裂解特性的微观调控模拟[J]. 电工技术学报, 2018, 33(22): 5159-5167.
Ni Xiaoru, Wang Jian, Wang Jingrui, Li Qingmin, Han Zhiyun. Micro-Control Simulation of Electro-Thermal Dissociation Characteristics of Carbon Nanotubes/Epoxy Resin Composites. Transactions of China Electrotechnical Society, 2018, 33(22): 5159-5167.
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2018, Vol. 33 
