有机硅烷提高航天器树脂材料抗原子氧剥蚀

Improving the atomic oxygen resistance of epoxy resin using organosilicon

为了提高航天器树脂材料的抗原子氧剥蚀的性能,把缩水甘油醚氧丙基三甲氧基硅烷加入到环氧树脂中,并对所制成的环氧树脂试样进行原子氧效应地面模拟试验,对试验前后试样的质量损失、表面形貌、表面成分和结构的变化进行了对比和分析.结果表明,添加有机硅烷可以有效地提高环氧树脂的抗原子氧剥蚀性能,试样表面在原子氧的作用下生成了一种三维网状结构,该结构有效地阻止了原子氧对底层材料的进一步剥蚀,使试样的质量损失和剥蚀率明显下降.50 h实验之后,添加了质量分数为25.0%的有机硅烷,该材料的剥蚀率约为纯环氧树脂的25%.

To improve the atomic oxygen （AO） erosion resistance of resin matrix materials applied to spacecrafts, γ-Glycidoxypropyhrimethoxy silane was filled in the epoxy resin with a direct-mixing method and then the AO exposure experiments were carried out. After the AO exposure, a three-dimension network structure was formed on the sample surfaces. This network structure protected the underlying materials from the AO erosion and the AO resistance of the polymer was improved remarkably; the mass loss and erosion yield decreased distinctly. It proves that filling the organosilicon in the epoxy resin is an effective method to improve AO resistance of the epoxy resin. After AO exposure for 50 h, the erosion yield of the polymer containing 25.0% organosilicon decreased to 25% of that of the pristine epoxy resin.