Affiliation:
1. School of Electrical Engineering, Southwest Jiaotong University , Chengdu 611756 , China
Abstract
Abstract
To study the effect of doping hexagonal boron nitride (h-BN) on the thermal properties and insulation resistance of epoxy resin (EP) and the mechanism of this effect, h-BN/epoxy composites with h-BN content of 0, 10, 20, 30, and 40 phr were prepared. Meanwhile, the corresponding molecular dynamics model of h-BN/epoxy composites was established, and the thermal conductivity, volume resistivity, glass transition temperature, and microstructure parameters of h-BN/epoxy composites were obtained. When the h-BN content is 40 phr, the thermal conductivity of h-BN/epoxy composite is increased by 138% compared to pure EP, and the glass transition temperature is increased by 76 K. At the same time, doping h-BN will reduce the insulation performance of EP. However, the lowest volume resistivity of h-BN/epoxy composite is still 1.43 × 1015 Ω·cm, and the EP composite still has good insulation performance. The fraction free volume and mean square displacement of EP decrease with the doping of h-BN, which indicates that h-BN can hinder the movement of molecular segments of EP, which is the reason for the increase in glass transition temperature.
Subject
Polymers and Plastics,Physical and Theoretical Chemistry,General Chemical Engineering
Reference35 articles.
1. Ronanki D, Singh SA, Williamson SS. Comprehensive topological overview of rolling stock architectures and recent trends in electric railway traction systems. IEEE Trans Transp Electr. 2017;3:1–1.
2. Wang L, Gao W, Zhang X, Xu S, Ren S, Guo J. Preparation and performance of high thermal conductive epoxy resin composite insulating materials. Insulat Mater. 2021;54(2):20–6.
3. Wang Y, Liu Y, Wang S, Xu H. The effect of electrothermal aging on the properties of epoxy resin in dry-type transformer. Trans China Electrotech Soc. 2018;33(16):3906–16.
4. Lin Y, Huang X, Chen J, Jiang P. Epoxy thermoset resins with high pristine thermal conductivity. High Volt. 2017;2(3):139–46.
5. Wang Y, Wang S, Huang Y, Yi L, Cai Y. Study on thermal aging characteristics of epoxy resin of dry-type transformer. High Volt Eng. 2018;44(1):187–94.
Cited by
14 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献