摘要
环氧树脂绝缘表面积聚的大量电荷是导致表面闪络的重要因素。在环氧树脂中掺杂TiO2无机纳米颗粒之后,可以增强其力学性能和抗电痕破坏性能,但对其表面电荷动态过程研究较少。同时,表层氟化可以保持原有有机聚合物的优良性能之外,还可使聚合物的本证缺陷得到改善。为此,制备了纯环氧试样以及含纳米TiO2质量分数分别为2%、4%、6%、8%的纳米复合试样,并对试样进行不同时间(0、30、60、90、120 min)的氟化处理,研究其在直流电场下纳米TiO2质量分数与氟化时间对表面电荷的积累与消散特性的综合影响。研究表明:纳米TiO2颗粒会减缓环氧树脂表面电荷消散的速度,6%纳米复合试样电荷消散最慢;表层氟化处理可以加速电荷消散速度,所以可以通过表层氟化处理来弥补纳米颗粒加入后对环氧树脂绝缘性能所带来的不利影响。
The accumulation of surface charge may cause electric field distortion which would lead to surface flashover. Nano-scale TiO2 doped in the epoxy resin can enhance the mechanical properties and resistance to tracking failure. However the mechanism of surface charge is seldom discussed. Meanwhile, fluorination can keep the good performance of organic polymer and improve the defects of polymer. In this paper, nano particles were dispersed in samples with weight ratios of 2%, 4%, 6%, and 8%. The undoped samples were employed as a comparison. After different fluorination time of 0, 30, 60, 90, 120 min respectively, surface charge accumulation and decay behavior were measured by an electrostatic voltmeter. The results proved that the addition of nano particles slowed down decay process. The lowest decay rate appears at 6%. However, fluorination can accelerate decay process. Taking all these into consideration, insulation properties can be improved.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第2期410-416,共7页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2014CB239506)~~
作者简介
李昂1986～，男，博士主要从事环氧树脂评估与改性研究E-mail：liangtju@163．com
杜伯学1961-，男，博士，教授，博导主要从事高电压与绝缘技术方面的教学与科研工作E—mail：duboxue@graail．com
徐航1991-，女，博士生主要从事硅橡胶评估与改性研究E—mail：xuhang199162@163．com
李忠磊1989-，男．博士生主要从事硅橡胶研评估与改性研究E-mail：lzlpiero@163．com
肖萌1988-，男，博士生主要从事环氧树脂研评估与改性研究E—mail：xiaomeng．0806@163．com
韩涛1987-，男，博士主要从事绝缘电介质性能分析研究工作E-mail：fageihantao@163．com
