聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性

无机材料学报, 2014, 29(1): 98-102. doi: 10.3724/SP.J.1077.2014.12749

聚酰亚胺/二氧化钛纳米复合薄膜制备与耐电晕性

孔宇楠 ^1, , 殷景华 ^2, , 铁雯鹭 ^3, , 刘晓旭 ^4, , 宋明歆 ^5, , 雷清泉 ^6,

1.哈尔滨理工大学应用科学学院,哈尔滨,150080

2.哈尔滨理工大学应用科学学院,哈尔滨150080;哈尔滨理工大学工程电介质及其应用教育部重点实验室,哈尔滨150080

3.哈尔滨理工大学应用科学学院,哈尔滨,150080

4.哈尔滨理工大学应用科学学院,哈尔滨,150080

5.哈尔滨理工大学应用科学学院,哈尔滨,150080

6.哈尔滨理工大学工程电介质及其应用教育部重点实验室,哈尔滨,150080

基金项目: National Natural Science Foundation of Heilongjiang Province of China(A201006) 黑龙江省自然科学基金(A201006) National Natural Science Foundation of China(51077028) NSF of Heilongjiang Province of China(QC2011C106) 黑龙江省青年科学基金(QC2011C106) 国家自然科学基金(51077028)

关键词：聚酰亚胺 , TiO2 , 复合薄膜 , 制备 , 耐电晕

Preparation and Corona Resistant of Polyimide/TiO2 Nanocomposite Films

Keywords： polyimide , TiO2 , composite film , preparation , corona resistant

采用原位聚合法制备不同TiO2组分聚酰亚胺(PI)/纳米TiO2复合薄膜,薄膜厚度50 μm. 测试结果表明,TiO2呈球状颗粒,直径约为100 nr,聚酰亚胺呈片状,尺寸约为2μm×1 μm.随着TiO2含量的增加,复合薄膜介电常数和介电损耗增大,击穿场强先增加后降低;在40 kV/mm电场强度下,复合薄膜耐电晕老化寿命增加,纯PI薄膜寿命为3h,20wt％TiO2含量薄膜寿命达到25 h;TiO2颗粒耐电晕能力强,与聚合物形成界面相,改变材料陷阱能级,有利于空间电荷的扩散和热量的传输,在薄膜表面形成放电阻挡层,降低局部放电对薄膜内部的侵蚀,显著提高薄膜耐电晕老化寿命.

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