摘要
采用溶胶凝胶法制备勃姆石溶胶,将勃姆石溶胶与聚酰胺酸(PAA)溶液混合,经过加热,制备得到聚酰亚胺/氧化铝(PI/Al_(2)O_(3))复合薄膜。利用傅里叶红外光谱(FT-IR)对所得聚合物的结构进行了表征,通过热重分析(TGA)、万能试验机对PI复合薄膜的热稳定性和机械性能进行了分析,利用扫描电镜(SEM)分析了Al_(2)O_(3)粒子在薄膜中的分散特性,通过高频脉冲电压测试仪测试了PI复合薄膜的耐电晕时间。结果表明,随着氧化铝含量的增加,PI/Al_(2)O_(3)复合薄膜的热稳定性呈先增加后降低的趋势,并且勃姆石溶胶与PI基体有良好的分散性,并提高了PI复合薄膜的耐电晕寿命,当Al_(2)O_(3)含量为16%时,PI/Al_(2)O_(3)复合薄膜的耐电晕寿命达到162分钟,是纯PI薄膜的32倍。
Boehmite sols were prepared by the sol-gel method, and then the boehmite sols were mixed with polyamide acid solution to prepare polyimide/alumina composite films. The structure of the polymer was characterized by Fourier transform infrared spectroscopy(FT-IR), and the thermal stability and mechanical properties of the films were measured by thermogravimetric analysis(TGA), universal testing machine. The dispersion characteristics of the particles in the films were analyzed by scanning electron microscopy(SEM). The corona resistance time of the composite films was tested. The results show that the thermal stability of PI films tends to increase and then decrease as the alumina content increases. And the bomite sol has good dispersion with PI substrate and improves the corona resistance life of PI films. When the Al_(2)O_(3) content is 16%, the composite film had a corona life of 162 minutes, which is 32 times longer than that of the pure PI film.
作者
高春
翟建广
吴天宸
卢惠亲
GAO Chun;ZHAI Jian-guang;WU Tian-chen;LU Hui-qin(College of Materials Engineering,Shanghai University of Engineering,Shanghai 201620,China)
出处
《广州化学》
CAS
2022年第2期52-57,共6页
Guangzhou Chemistry
