耐电晕PI/无机纳米氧化物复合薄膜设计及性能  

Preparation and corona resistant properties of nano-inorganic oxide hybrid PI films

作　　者：陈昊[1] 范勇[1] 周宏[1] 杨瑞宵[1] 王春平[1] 韩笑笑[1] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《电机与控制学报》2012年第5期81-85,共5页Electric Machines and Control

基　　金：国家自然科学基金(50373008)

摘　　要：采用热液法制备了纳米无机氧化物分散液,其中水解所需的水由醇缩水成醚反应提供。所得的MTES改性的纳米氧化铝与聚酰亚胺复合制成杂化聚酰亚胺复合薄膜(PI/Al2O3-SiO2),另外还制备了未改性的纳米氧化铝杂化聚酰亚胺复合薄膜(PI/Al2O3),在试样厚度均为25μm的情况下,采用双极性脉冲方波电压、峰-峰值2500 V、频率20 kHz、占空比50%、测试温度155℃的条件下,分别测试上述两种薄膜以及Kapton 100 CR薄膜的耐电晕时间,结果表明,PI/Al2O3-SiO2薄膜的耐电晕寿命最长,是Kapton 100 CR薄膜的6倍以上,是PI/Al2O3薄膜的12倍以上。由SEM的测试结果分析表明,PI/Al2O3-SiO2薄膜中的无机纳米复合结构可以更有效地保护PI基体,从而提高材料的耐电晕性。The nano-dispersion of inorganic oxide is prepared by using the hydrothermal method and the water needed for the experiment is obtained from the process of the condensation reaction from alcohol in-to ether. The dispersion is composite with PI to make the inorganic nano-oxides hybrid PI films （PI/ AIEO3-SiO2 and PI/AI2O3 ）. As the sample is 25 μm in thickness, the test parameters are chosen as be-low： the waveform is bipolar square, wave pulse voltage is 2 500 V peak to peak, frequency is 20 kHz, and duty cycle is 50%, the test temperature is 155 ℃ ,the corona-resistant life of DuPont Kapton 100 CR film, PI/A12 O3-SiO2 film and PI/A12 O3 films are measured respectively. The results show that the corona-resistance life of the modified nano-alumina hybrid PI films is the longest of all, which is more than 6 times as that of Kapton 100 CR films and 12 times more than that of the unmodified nano-alumina hybrid PI films. From the resulting SEM images, a conclusion can be made that the inorganic nano-composite structure of the modified nano-alumina hybrid PI films protects the PI substrate more effectively.

关 键 词：热液法 无机纳米氧化物 聚酰亚胺薄膜 耐电晕 

分 类 号：TM215[一般工业技术—材料科学与工程]