原子氧对Kapton侵蚀及ZnO-有机硅涂层防护效应研究

Ground-based investigations of atomic oxygen erosion behaviors of Kapton and ZnO-siloxane coatings on Kapton

在原子氧(AO)侵蚀地面模拟试验设备中对聚酰亚胺(Kapton)和涂ZnO-有机硅防护层的样品进行原子氧剥蚀效应试验。用LAMBDA-9分光度计、光电子能谱(XPS)、红外光谱(FTIR)和扫描电镜(SEM)等对试验前后试样的表面形貌、质量及化学结构进行表征研究。AO对Kapton表现了较严重的侵蚀作用,其化学结构、元素百分含量和表面形貌都发生明显变化。而所施用的ZnO-有机硅涂层对AO辐照有较强的防护效果,并具有较好的空间稳定性。因腐蚀产物为SiO2,这对抑制AO的进一步侵蚀起到了关键作用。

The erosion behaviors of Kapton and ZnO-siloxane coatings on Kapton have been studied during exposure in the AO environment in a ground-based simulation facility. The variation of chemical and physical properties of the samples surface after they were exposed to AO fluxes was investigated by LAMBDA-9 spectrophotometer, X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The results indicate that Kapton undergoes dramatically chemical degradation, including the mass loss and change of surface morphologies; ZnO-siloxane coatings have excellent properties for anti-AO effects. The erosion product is SiO2 left on the surface, thus, providing the protection from the further attack by the energetic oxygen atoms.