聚酰亚胺空间爬行屏障材料的制备与性能研究

项目名称： 聚酰亚胺空间爬行屏障材料的制备与性能研究

项目编号： No.20804055

项目类型： 青年科学基金项目

立项/批准年度： 2009

项目学科： 机械、仪表工业

项目作者： 王晓龙

作者单位： 中国科学院兰州化学物理研究所

项目金额： 18万元

中文摘要： 本项目拟通过先合成芳香二胺单体再聚合的方法将全氟化烷基基团引入到聚酰亚胺的分子侧链上，设计制备具有极低表面能的梳状结构聚酰亚胺薄膜，考察该类材料真空条件下与空间用润滑油的润湿性能，研究全氟化烷基基团及其在聚酰亚胺材料表面的组成、结构对聚酰亚胺薄膜材料理化性能和表面性质的影响规律，探索模拟空间环境对聚酰亚胺薄膜理化和力学性能、表面性质、薄膜爬行屏障性能的影响及作用机理，提出影响低表面能聚酰亚胺薄膜爬行屏障性能和使用寿命的各种因素，获得具有优异综合性能的聚酰亚胺爬行屏障薄膜的制备方法，为发展我国具有自主知识产权的空间机械用爬行屏障材料提供理论依据和技术支撑，为我国将于近期出版的《空间润滑材料技术手册》提供空间爬行屏障材料方面的基础数据。

中文关键词： 聚酰亚胺；低表面能；爬行屏障

英文摘要： The project aims to prepare the comb-like polyimide (PI) films with ultra-low surface energy as the lubricating oil barrier materials. PI precusors will be synthesized by alternative polymerization of the aromatic diamines bearing perfluoroalkyl groups and aromatic dianhydrides. The dip-coated films of PI precusors transform to PI films after curation at elevated temperature, on which the wettbility of lubricating oil will be investigated in simulated space environment. The influence of the perfluoroalkyl groups (composition and structure) and the simulated space environment on wettability of lubricating oil will be studied in detail. The relationship between surface characteristics and the anticreeping capability of PI films, and the effects of space environment on the physiochemical properties, mechanical property, surface properties and anticreeping capability will be elucidated. According to the feeback results, the preparation method of PI creep barriers with excellent combination properties will be optimized to achieve. The research will provide theorectical bases and technical supports for our country's creep barrier materials with independent intellectual property and basic data for "Handbook of Space Lubicating Materials and Technology" to be published soon.

英文关键词： polyimide; low surface energy; creep barrier