Preparation and Properties of Atomic Oxygen Protective Coating Through Sol-Gel Method
溶胶-凝胶法制备抗原子氧涂层及性质研究

A coating of atomic oxygen resistant was obtained through the sol-gel method, and the precursors for the coating were synthesized and analyzed. The precursor liquid was prepared by using methacryloxypropyltrimethoxysilane (MAPTMS) and tetraethylorthosilicate (TEOS).IR spectra of different precursor liquids were compared, and the strength of Si-O bonds was discussed. The coatings prepared from the precursor liquid were exposed on atomic oxygen in an amount of 5.4xl020/cm2. The results obtained demonstrate that the amount of TEOS addition has greater effects on the strength. SEM experiment shows that they also possess the good performance on the atomic AO exposed oxygen resistant. The SEM photos show nearly no change for the coatings prepared from the precursors with and without AO exposure, but the substrate Kapton without protective coating eroded. The coating prepared from this kind of precursor can protect the polymer surface from atomic oxygen erosion, and can be used in the spacecraft in LEO.