【作者】 赵小虎； 王明珠； 凌越； 沈志刚； 邢玉山；

【Author】 ZHAO Xiao-hu, WANG Ming-zhu, LING Yue, SHEN Zhi-gang, XING Yu-shan(Beijing Key Lab. for Powder Technology Research & Development, Beijng University of Aeronautics andAstronautics, Beijing 100083, China)

【机构】 北京航空航天大学粉体技术重点实验室；

【摘要】 为解决航天器用聚合物受原子氧剥蚀严重的问题,把一种不与原子氧反应的纳米SiO2加入到常用的环氧树脂基体中,以提高材料的抗原子氧剥蚀性能.通过对所制备SiO2/环氧树脂复合材料试样的原子氧效应地面模拟试验发现,添加纳米SiO2后,环氧树脂试样的抗原子氧剥蚀性能得到了明显的改善,原子氧效应试验质量损失和剥蚀率显著减小.通过对试验前后试样表面成分、表面结构的分析得出结论,由于SiO2不与原子氧反应,同时纳米材料还具有很高的表面活性,它与树脂可能会发生聚合,在其内部形成一些能够抵抗原子氧剥蚀的新结构.这可能是添加纳米SiO2能够提高环氧树脂抗原子氧剥蚀性能的主要原因之一.更多还原

【Abstract】 Polymers are frequently used on spacecrafts. But they will be severely eroded by atomic oxygen in the orbital environment To reduce the erosion of the spacecraft materials, an inorganic superfine particles-nano-SiO2 was filled in a solution of epoxy resin to prepare particle / resin composite. The samples were tested in a ground based AO effect simulation facility. It was found that the samples filled with nano-SiO2 had an excellent AO-resistant characteristic. Because SiO2 is non-reactive with AO and the nano-particles have large surface energy, when it is filled in resin some new structures will be formed by the polymerization between resin and nano-particles, which can serve as a barrier to resist the erosion of AO. This may be one of the main reasons to improve the AO-resistant characteristic of the resin.更多还原