Preparation of Room Temperature Curable Organic-inorganic Hybrid Thermal Control Coatings

A series of organic-inorganic hybrid thermal control coatings (TCCs) were prepared. The binder was prepared by co-pre-hydrolysis/condensation of tetraethylorthosilicate (TEOS) and siloxane, subsequently mixing with 3-aminopropyltriethoxysilane (APTES) as curing catalyst and ZnO powder as optical pigment. The coatings can be cured at room temperature naturally with low solar absorptance S and high thermal emittance H . Fourier transform infrared spectroscopy (FT-IR) and gel permeation chromatography (GPC) measurements were carried out to understand the structures of the coatings. FT-IR spectra and GPC analysis results showed that the as-prepared hybrid binder carried lots of active hydroxyls with an appropriate polymerization degree. Thermal gravimetric analyzer (TGA) test showed that as-prepared coatings have high thermal stability at 200 .