文献类型：期刊文献

中文题名：Resistance of Nanoclay Reinforced Epoxy Composites to Hyperthermal Atomic Oxygen Attack

英文题名：纳米粘土增强环氧树脂复合材料抗原子氧性能的研究（英文）

作者：Hei-long Wang[1,2];Vanessa J. Murray[3];Min Qian[4];Donna J. Minton[3];Ai-yi Dong[1];Kin-tak Lau[5];Bo-han Wu[6];Li Che[1];Timothy K. Minton[3]

机构：[1]College of Science, Dalian Maritime University, Dalian 116026, China;[2]State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;[3]Department of Chemistry and Biochemistry, Montana State University, 103 Chemistry and Biochem- istry Bldg., Bozeman, Montana 59717, United States of America;[4]Department of Physics, School of Science, East China University of Science and Technology, Shanghai 200237, China;[5]Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn VIC 3122, Australia;[6]Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China

年份：2019

卷号：32

期号：5

起止页码：543

中文期刊名：Chinese Journal of Chemical Physics

外文期刊名：化学物理学报（英文）

收录：CSTPCD;;Scopus;CSCD:【CSCD2019_2020】；

基金：the National Natu- ral Science Foundation of China (No.21473015 and No.41574101);the Fundamental Research Funds for the Central Universities (No.3132018233).

语种：英文

中文关键词：Atomic;oxygen;Epoxy;Nanoclay;Low;Earth;orbit

外文关键词：Atomic oxygen;Epoxy;Nanoclay;Low Earth orbit

摘要：Due to outstanding mechanical properties, heat resistance, and relatively facile production,nanoclay reinforced epoxy composites(NCRE composites) have been suggested as candidate materials for use on external surfaces of spacecraft residing in the low Earth orbit(LEO) environment. The resistance of the NCRE composites to bombardment by atomic oxygen(AO), a dominant component of the LEO environment, has been investigated. Four types of samples were used in this study. They were pure epoxy(0 wt% nanoclay content), and NCRE composites with different loadings of nanoclay—1 wt%, 2 wt%, and 4 wt%. Etch depths decreased with increasing nanoclay content, and for the 4 wt% samples it ranged from 28% to 37% compared to that of pure epoxy. X-ray photoelectron spectroscopy(XPS) indicates that after AO bombardment, relative area of C-C/C-H peak decreased,while the area of the C-O, ketones peaks increased, and the oxidation degree of surfaces increased. New carbon-related component carbonates were detected on nanoclay containing composite surfaces. Scanning electron microscopy indicates that aggregates formed on nanoclay-containing surfaces after AO bombardment. The sizes and densities of aggregates increased with nanoclay content. The combined erosion depths, XPS and SEM results indicate that although all the studied surfaces got eroded and oxidized after AO bombardment,the nanoclay containing composites showed better AO resistance compared to pure epoxy,because the produced aggregates on surface potentially act as a physical "shield", effectively retarding parts of the surface from further AO etching.