文献类型：期刊文献

英文题名：Hyperthermal atomic oxygen durable transparent silicon-reinforced polyimide

作者：Qian, Min[1];Xuan, Xiao Yang[1]

机构：[1]East China Univ Sci & Technol, Sch Sci, Dept Phys, Shanghai 200237, Peoples R China

年份：2019

卷号：31

期号：7

起止页码：831

外文期刊名：HIGH PERFORMANCE POLYMERS

收录：;EI(收录号：20190406403643);WOS:【SCI-EXPANDED(收录号:WOS:000480275000009)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This work was sponsored by National Natural Science Foundation of China (grant no 61804054), Fundamental Research Funds for the Central Universities (project no 222201714017), Shanghai Sailing Program (17YF1403300), and Natural Science Foundation of Shanghai (18ZR1410400).

语种：英文

外文关键词：Hyperthermal atomic oxygen; transparent polyimide; polyhedral oligomeric silsesquioxane; erosion; low Earth orbit

摘要：A clear poly(amic acid) was reinforced by a trisilanolphenyl polyhedral oligomeric silsesquioxane (POSS) by direct dissolution, and transparent silicon-reinforced polyimide (Si-RPI) films with different POSS loadings were obtained after curing, showing high transmittance of >90% within 380-800 nm. The Si-RPI films were exposed to a ground hyperthermal atomic oxygen (AO) beam. The erosion depths and derived erosion yields of the materials decreased with POSS loadings. At a 20 wt% POSS loading, the Si-RPI showed an erosion yield of 0.13 x 10(-24) cm(3) atom(-1) at a fluence of 2.79 x 10(20) O atoms cm(-2). Surface morphology and element composition characterization on Si-RPI indicated that SiOx-based passivating layers were formed on surfaces upon the hyperthermal AO attack. This study suggests a facile way of reinforcing Si into transparent polyimide for a promising candidate of spacecraft coating material operating in low Earth orbit.