摘要
为研究超支化聚酯界面修饰对纳米SiO2/环氧树脂(EP)复合材料电树枝生长特性的影响,分别基于化学接枝与等离子体辅助接枝两种界面修饰方法,制备不同填充质量分数的纳米SiO2/EP复合材料。利用针-板电极进行局部放电测试和电树枝实验,并观察电树枝的生长情况。结果表明:通过等离子体对纳米SiO2表面接枝后,复合材料出现0.99~1.53eV深陷阱;填充3%时,复合材料的局部放电起始电压达到峰值14.5kV,较纯EP提高了55.9%;填充5%时,其耐电树枝性能达到最优;并且在相同填充质量分数下,其电树枝的复杂程度更高。研究发现,等离子体辅助接枝改性,提高了复合材料界面结合强度,并引入了深陷阱,进而改善了纳米SiO2/EP复合材料电树枝生长特性。
In order to study the influence of Hyperbranched Polyester interface modification on the growth characteristics of electrical tree for nano-SiO2/EP,the nanocomposites filled with different content were prepared by chemical grafting and plasma assisted grafting.Then,the partial discharge and electrical tree development experiments were investigated by a needle-plate electrode system.Experimental results show that deep traps of 0.99~1.53eV are observed in the nanocomposites modified by plasma-assisted grafting.The partial discharge inception voltage reaches a peak value of 14.5kV at 3%filling content,which is 55.9%higher than that of pure EP.And the electrical tree resistance is optimal at 5%filling content.Moreover,the complexity of electrical tree is higher at the same filling content.This paper indicates that plasma-assisted grafting enhances the bond strength of the nanocomposites interface and introduces deep traps in the interface area,which in turn improves the electrical tree resistance of nano-SiO2/EP.
作者
杨国清
刘庚
王德意
王闯
李嘉昕
Yang Guoqing;Liu Geng;Wang Deyi;Wang Chuang;Li Jiaxin(State Key Laboratory Base of Eco-Hydraulic Engineering in Arid Area Xi’an University of Technology,Xi’an 710048 China;Institute of Water Resource and Hydroelectric Engineering Xi’an University of Technology,Xi’an 710048 China;State Grid Shaanxi Power Company Xi’an Power Supply Bureau,Xi’an 710032 China)
出处
《电工技术学报》
EI
CSCD
北大核心
2020年第20期4415-4422,共8页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51707155)
西北旱区生态水利工程国家重点实验室基金(2016ZZKT-12)资助项目。
关键词
超支化聚酯
低温等离子体
环氧树脂
界面改性
电树枝
Hyperbranched polyester
low-temperature plasma
epoxy resin
surface modification
electrical tree
