纳米氧化铝改性聚酰亚胺薄膜的制备与表征  

Synthesis and Characterization of Corona-resistant Nano-Alumina/Polyimide Film

作　　者：陈昊[1] 刘俊[1] 何明鹏[1] 李娟[1] 范勇[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：《哈尔滨理工大学学报》2009年第2期90-94,共5页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(50373008);黑龙江省科技攻关项目(GC04A216)

摘　　要：采用微乳化技术制备了铝的纳米氧化物分散液,并将其掺杂到聚酰亚胺基体中,分别制备出质量分数为4%、8%、12%、16%、20%、24%的聚酰亚胺杂化薄膜.利用耐电晕测试装置、耐击穿测试装置、热失重分析仪(TGA)、扫描电子显微镜(SEM)对薄膜进行了性能测试和结构表征.结果表明,经铝的纳米氧化物杂化的聚酰亚胺薄膜的耐电晕性能随铝的纳米氧化物掺杂量的增加而提高,当纳米组分的质量分数达到24%时,在60kV/mm的工频电压下,薄膜的耐电晕寿命可达50.7h(IEC343);杂化薄膜的击穿场强随掺杂量的增加而下降;铝的纳米氧化物掺杂量增加可以提高聚酰亚胺薄膜的热分解温度;所掺杂的纳米粒子可以较均匀地分散在聚酰亚胺基体中.In this paper, nano-alumina suspended liquid were prepared through micro-emulsion technology, then doped it into the polyimide matrix, and prepared polyimide film with 4%, 8%, 12%, 16%, 20%, 24% （ counting as AI203 ） amount of alumina. The structure and properties of the film were measured and characterized by corona discharge measuring equipment, breakdown strength measuring system, TGA and SEM, respectively. It is shown that the more the inorganic in polyimide composite film, the longer the corona-resistant lifespan of polyimide film ; when the inorganic content reaches 24% and the electric strength is 60kV/mm 50Hz, the Corona-resistant lifespan is 50. 7 hours （ IEC343 ）. But the breakdown strength of film declines with the inorganic content increasing. The thermal decomposition temperature of Polyimide films rises as the inorganic content increases. The inorganic nanoparticles can be dispersed evenly in the polyimide film.

关 键 词：聚酰亚胺 铝的纳米氧化物 无机杂化 耐电晕 

分 类 号：TM215[一般工业技术—材料科学与工程]