ゾル-ゲル法でのシリカ薄膜表面形状制御法とはっ水処理ガラスへの応用

概要

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Silica films with various surface morphologies, such as flatness, mesoporosity, uneveness, convexity, were prepared by hydrolysis and polymerization of tetraethoxysilane, Si(OC_2H_5)_4(TEOS) and methyltrietoxysilane, CH_3Si(OC_2H_5)_3(MTES) under acid-catalyzed conditions. The morphology of coatings could be changed by changing the molar ratio (denoted as f, f=MTES/TEOS) in TEOS-MTES mixture, as well as the conditions of drying process and heat treatment temperature. Especially, in the case of 5 <f≦7.5, the surface of coatings was uneven, when films were prepared at humidities higher than 45 RH%. Water repellent glasses obtained by coating hydrolyzed heptadecafluorodecyltrimethoxysilane. CF_3 (CF_2)_7CH_2CH_2Si (OCH_3)_3 on to this uneven surface showed an excellent abrasion resistance and UV-light stability for windows of automobiles and buildings.
社団法人日本セラミックス協会の論文
1997-11-01