抗原子氧有机/无机氧化硅复合涂层的研究

以正硅酸乙酯（TEOS）和γ-（甲基丙稀酰氧）丙基三甲氧基硅烷（MEMO）为前驱体,在聚酰亚胺基底上制备了氧化硅涂层,采用扫描电镜（SEM）、傅里叶红外衰减全反射光谱（FTIR-ATR）和X光电子能谱（XPS）对其表面形貌、结构和成分进行了分析.结果表明MEMO的加入增加了氧化硅涂层的韧性,并赋予其憎水性能,表面化学成分由MEMO以及TEOS＋MEMO的水解和缩聚过程决定.用地面模拟设备对氧化硅涂层进行原子氧暴露试验,结果表明其具有很好的防原子氧性能,使基体原子氧侵蚀速率下降了一个数量级.

Structure and Properties of Organic/Inorganic Hybrid Silica Coatings

Silica coatings on the surface of polyimide are prepared by sol-gel coating process with tetraethoxysilane(TEOS) and 3-(methacryloxypropyl)-trimethoxy silane(MEMO) as precursors.The surface configuration and structure of the silica coatings are analyzed by scan electron microscope(SEM),Fourier transformed infrared attenuated total reflection(FTIR-ATR) and X-ray photoelectron spectroscopy(XPS).The results show that the adding of MEMO increases the toughness of silica coatings,and gives them the hydrophobic property.The chemical states on the surface are decided by the hydrolysis and condensation processes of MEMO and TEOS+MEMO.The experiments result of atomic oxygen with ground simulation device indicates that the coatings have good AO(atomic oxygen)-resistance properties,and the rate of AO corrosion of polyimide decreases by one order of magnitude.