Preparation and characterization of polyimide/Al2O3 hybrid films by sol–gel process
Preparation and characterization of polyimide/Al2O3 hybrid films by sol–gel process
复制标题
DOI：
10.1002/app.27540
复制
发表时间：
2008-04
影响因子：
3
通讯作者：
Pengchang Ma;W. Nie;Zheng Yang;Peihong Zhang;Gang Li;Q. Lei;Lian‐xun Gao;Xiangling Ji;M. Di
中科院分区：
文献类型：
--
作者：
Pengchang Ma;W. Nie;Zheng Yang;Peihong Zhang;Gang Li;Q. Lei;Lian‐xun Gao;Xiangling Ji;M. Di
以邻苯二酐（PMDA）和4,4′-氧化二胺（ODA）为单体，采用溶胶-凝胶法制备了不同Al2O3含量的聚酰亚胺(PI)/Al2O3杂化膜。FESEM和TEM图像表明，超声处理异丙铝溶胶和热亚酰化凝胶膜后，Al2O3颗粒在聚酰亚胺基体中分散较好。Al2O3含量的增加明显提高了杂化PI薄膜的尺寸稳定性、热稳定性和力学性能，而介电性能和断裂伸长率则随着Al2O3含量的增加而降低。与纯PI膜相比，在一定范围内，随着Al2O3含量的增加，杂化膜的抗电晕性能得到了很大的提高。
A sol-gel process has been developed to prepare polyimide (PI)/Al2O3 hybrid films with different contents of Al2O3 based on pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA) as monomers. FESEM and TEM images indicated that Al2O3 particles are relatively well dispersed in the polyimide matrix after ultrasonic treatment of the sol from aluminum isopropoxide and thermal imidization of the gel film. The dimensional stability, thermal stability, mechanical properties of hybrid PI films were improved obviously by an addition of adequate Al2O3 content, whereas, dielectric property and the elongation at break decreased with the increase of Al2O3 content. Surprisingly, the corona-resistance property of hybrid film was improved greatly with increasing Al2O3 content within certain range as compared with pure PI film.