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将采用水相分离法制备的以明胶为囊壁、有机硅为囊芯的微胶囊与有机硅树脂乳液在一定条件下混合,在聚酰亚胺薄膜(Kapton)基材表面制备出含有机硅树脂的微胶囊-有机硅复合涂层,并将所制备的涂层分别进行原子氧暴露试验。结果表明,原子氧对Kapton侵蚀严重,质量损失严重,由原来光滑平整的表面变为凹凸不平的地毯状,太阳光吸收率变化值Δα为0.272。微胶囊-有机硅复合涂层对Kapton基体优良的保护作用,使试样的质量损失和剥蚀率明显下降,且Δα仅为0.071。尤其是微胶囊与有机硅质量比为1∶5的涂层,质量损失为Kapton试样的2.3%。
The aqueous microcapsule with the gelatin as the capsule wall and the silicone core as the capsule core and the silicone resin emulsion are mixed under certain conditions, and the surface of the Kapton substrate is prepared with the silicon Resin microcapsules - silicone composite coating, and the prepared coating were subjected to atomic oxygen exposure test. The results showed that the atomic oxygen attacked the Kapton seriously, and the mass loss was serious. From the smooth and flat surface to the rugged carpet, the change of solar absorptance Δα was 0.272. Microcapsule - silicone composite coating on the Kapton matrix excellent protection, the sample mass loss and erosion rate decreased significantly, and Δα only 0.071. In particular, the coating mass ratio of microcapsules to silicone is 1: 5, and the mass loss is 2.3% of the Kapton sample.