Efficiency of silane precursors on textile printing using anionic dyes

A different approach is by using sol-gel technique to modify the surface of blend fabrics to render them dyeable with one class of dyes e.g. anionic, nonionic and functional dyes. The sol-gel technique involves the formation of mineral phases, starting from molecular precursors, following an inorganic polymerization reaction. The reaction is usually at room temperature in water or solvents and different range of pH conditions. The first step in the sol-gel process of silica consists of hydrolysis of silicon alkoxides, then condensation forming the silica nanoparticles and depending on the reaction conditions, these particles can grow and form the sol which can be deposited on the surface of the substrate forming a film. In this section two selected silane precursors were used APTES [(3-Aminopropyl) – triethoxysilane)], GPTMS [(3-glycidoxypropyl) –trimethoxysilane], to modify PET/W, PET/C, cotton and polyester fabrics via film coating with nanosol.