有机硅改性聚酰亚胺复合膜的抗原子氧性能研究

Study on the AO-resistant property of polyimide composite films modified by silicone

摘要:

由端氨丙基聚二甲基硅氧烷（PDMS）、均苯四甲酸二酐（PMDA）和4,4’-二氨基二苯醚（ODA）在N,N’-二甲基乙酰胺（DMAc）中共聚，热亚胺化法制备有机硅改性聚酰亚胺复合膜。通过傅立叶变换红外吸收光谱仪（FTIR）、X射线光电子能谱（XPS）分析材料的化学结构，采用扫描电子显微镜（SEM）观察材料的表观形貌，利用地面原子氧（AO）模拟设备研究了该复合膜的抗原子氧性能。结果表明有机硅改性聚酰亚胺复合膜在AO累积通量达到2.06?020atom/cm2时，复合膜的AO剥蚀率可以达到6.69?0-25 cm3/atom，约是纯聚酰亚胺薄膜抗原子氧性能的4.5倍。

Abstract:

A series of novel polyimide composite films modified by silicone were synthesized from aminopropyl-end capped polydimethylsiloxane(PDMS), pyromellitic dianhydride(PMDA), and 4, 4’-oxydianiline(ODA) via thermal imidiazation. Films were analyzed and characterized by FTIR, XPS and SEM. The AO-resistant property of composite films was tested by ground atomic oxygen (AO) simulation devices. It was revealed that the AO denudation rate of composite films could be up to 6.69?0-25cm3/atom when the AO flux was up to 2.06?020atom/cm2. The AO-resistant property of composite films is about 4.5 times to pure polyimide films.