空间紫外辐射环境及效应研究

Studies on space ultraviolet environment and its effects on spacecraft materials

空间紫外辐照度虽然很低(只有约118.1W/m^2),但是由于单个紫外光子的能量很高,可以使大多数材料分子的化学键断裂,所以紫外辐射会对航天器外露材料的性能产生严重影响。紫外辐射可以导致航天器的热控涂层光学性质改变,使有机聚合物材料发生降解,光学、力学性能降低。文章介绍了空间紫外辐射环境的模型,列举了对航天器常用的有机粘合剂、柔性材料、有机薄膜等的紫外辐射效应,并对空间紫外辐射效应的深入研究提出建议。

Although ultraviolet(UV)in space takes a total radiance of not more than 118 W/m^2,the photons have such high energy as would break the chemical bonds of many materials.The properties of many exposed materials on spacecrafts are likely to be greatly degraded by UV irradiation.For instance,the physical and chemical properties of thermal control coatings and polymers may change significantly during UV irradiation.The space UV irradiation effects are reviewed in this paper;relevant research work in China is sp...