Abstract
A wipe-on self-cleaning coating based on silane has been developed, characterized, and applied on glass facades. It is a transparent, robust, and long-lasting hydrophobic coating consisted of two silane layers. The inter layer derives from a mixture of chlorotrimethylsilane and polymethylhydrosiloxane, while the outer layer derives from a mixture of 1H,1H,2H,2H-perfluorooctyltriethoxysilane and polydimethylsiloxane. The glass samples treated with the developed coating exhibited a water contact angle of 120° and an oil contact angle of 84°, indicating excellent hydrophobic and slightly oleophobic properties. The durability of the coating has been verified via salt spray test, UV condensation, and chemical corrosion test, suggesting long-lasting properties. Its mechanical resistance properties have been evaluated by applying pencil hardness, rub, and sandblasting tests. Corresponding results demonstrated the excellent anti-scratch properties of the developed coating. All the outstanding performances of the developed coating ensure its potential commercial application for glass facades.
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