高压电器2017，Vol.53Issue(7)：60-66,7.DOI:10.13296/j.1001-1609.hva.2017.07.010
温湿度对掺杂纳米氧化铝的聚酰亚胺薄膜耐电晕性能影响研究
Study on Influence of Corona Resistance of Temperature and Humidity on Polyimide Film Doped with Nano Alumina Oxide
摘要
Abstract
To study the influence of temperature and humidity on corona resistance of polyimide (PI) doped with nano alumina (Al2O3) particles,PI/Al2O3 composite film is prepared by in situ method,then corona resistance test of pure PI film and PI/Al2O3 composite film under high frequency square voltage is conducted.The results show that PI/Al2O3 composite film performances better than pure PI film on corona resistance under the same voltage,because nano particles would float on the surface of film which can protect film from further erosion.In addition,polyimide would degrade and produce much gas distributing among polymer matrix,which resulting in distortion of electric field and shorten the life time of film as the increase of temperature.Because of PI/Al2O3 film higher thermal conductivity than pure PI film,PI/Al2O3 film shows better performance in high temperature environment.Furthermore,with the increase of relative humidity,the life time of corona resistance of PI/Al2O3 film would increases first and then decreases,it mainly because water molecule would surround nano particles and form "water shell",resulting in more transmission paths of charge emerges when relative humidity is low.While relative humidity is high,a lot of ions and little molecules produce due to hydrolysis of polyimide,which leads to distortion of electric filed and deterioration of erosion from corona.关键词
聚酰亚胺/耐电晕/热失重分析(TGA)/扫描电镜(SEM)Key words
polyimide/corona resistance/thermal gravity analysis(TGA)/scanning electron microscopy(SEM)引用本文复制引用
钟鑫,吴广宁..温湿度对掺杂纳米氧化铝的聚酰亚胺薄膜耐电晕性能影响研究[J].高压电器,2017,53(7):60-66,7.基金项目
国家自然科学基金(51177136).Project Supported by National Natural Science Foundation of China(51177136). （51177136）
