Resistance of Nanoclay Reinforced Epoxy Composites to Hyperthermal Atomic Oxygen Attack  

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 Vanessa J. Murray Min Qian Donna J. Minton Ai-yi Dong Kin-tak Lau Bo-han Wu Li Che Timothy K. Minton 

机构地区：[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

出　　处：《Chinese Journal of Chemical Physics》2019年第5期543-552,共10页化学物理学报（英文）

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).

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.

关 键 词：ATOMIC OXYGEN EPOXY NANOCLAY Low Earth ORBIT 

分 类 号：O6[理学—化学]