文献类型：期刊文献

英文题名：Atomic oxygen durable ultra-black polyimide nanocomposite films in solar spectrum

作者：Qian, Min[1];Liu, Gang[2];Zhou, Bo[2];Xuan, Xiao Yang[1];Niu, Yue Ping[1,3];Gong, Shang Qing[1,3]

机构：[1]East China Univ Sci & Technol, Sch Sci, Dept Phys, Shanghai 200237, Peoples R China;[2]Shanghai Inst Spacecraft Equipment, Shanghai 200240, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China

年份：2020

卷号：175

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20201108300935);WOS:【SCI-EXPANDED(收录号:WOS:000526110900002)】；

基金：The authors appreciate Timothy K. Minton and Chen Biao Xu at Montana State University for the hyperthermal atomic oxygen test. This work is sponsored by National Natural Science Foundation of China (61804054, 11774089), Natural Science Foundation of Shanghai (18ZR1410400), Shanghai Sailing Program (17YF1403300), the Shanghai Aerospace Science and Technology Innovation Fund (SAST2019-067), the Fundamental Research Funds for the Central Universities (222201714017), and the Social Development Program of Shanghai (17DZ1200900, 18DZ2252400).

语种：英文

外文关键词：Ultra-black; Polyimide; POSS; Dye; Carbon black; Atomic oxygen

摘要：Black thermal control blankets have been widely used in spacecraft for eliminating stray light around high-resolution optical instruments. However, the limited absorption in visible light range, the fast degradation upon hyperthermal atomic oxygen (AO) in low Earth orbit (LEO), and the poor adhesion of black coatings with substrate confined their applications into board solar spectrum and multi-layer interface engineering. In this work, a nanocomposite polyimide film containing a trisilanolphenyl POSS, a dye of solvent black 34, and a carbon black of CABOT M800 has been designed. With an ingredient of 20 wt% POSS, 5 wt% dye, and 10 wt% carbon black, the nanocomposite polyimide film PPIBCIO exhibited an ultra-low transmittance near zero in the range 200-2000 nm, a low reflectance below 5% in UV range and below 2% in VIS-IR range, and a low erosion yield of 0.49 +/- 0.11 x 10(-2)4 cm(3) atom(-1) upon a 2.27 x 10(20) atoms cm(-2) hyperthermal AO exposure, with an absorptance of 0.983, an emissivity of 0.86, and a coefficient of thermal expansion of 20 ppm degrees C-1. SEM and XPS analysis indicated that a uniform SiOx passivating network was formed on surface upon the hyperthermal AO exposure. The tensile strength decreased with increasing additives, and kept stable upon the AO exposure, for there was only sub-micrometer in erosion depth. The thermal expansion coefficients of the nanocomposite films are comparable to that of Kapton, which benefits interface engineering. The small granularity of tens of micrometers and good solubility in poly(amic acid) of additives POSS, dye, and carbon black benefit potential manufacture. This study suggests an ultra-black AO durable polyimide film for potential applications in LEO. (C) 2020 Elsevier Ltd. All rights reserved.