The effect of surface modification with silane coupling agent on blue-light curable inkjet printing of TiO2 particles as white inks

A series of modified titanium dioxide (TiO2) particles was prepared by three kinds of silane coupling agent grafted on the surface of the TiO2 particles. The modified TiO2 particles were characterized by FT-IR, TGA, EDS and... [ view full abstract ]

A series of modified titanium dioxide (TiO₂) particles was prepared by three kinds of silane coupling agent grafted on the surface of the TiO2 particles. The modified TiO2 particles were characterized by FT-IR, TGA, EDS and DLS. The modified TiO2 particles were used in blue-light curable pigment inks as white pigment. The result confirmed that the three kinds of silane coupling agent had been successfully grafted onto the surface of the TiO2 particles. The TGA and EDS also indicated that the TiO2 particle surface had been grafted with the silane coupling agent. The TiO2 particle size was decreased by the silanization modification. For the application of blue light curable pigment inks, the viscosity of the white ink is slightly reduced by the silanization modification, the photo-polymerization performance was obviously improved after modified with the 3-(Trimethoxysilyl)propyl methacrylate (KH570) and 3-Aminopropyltriethoxysilane (KH550), the dispersion stability of white ink was improved after modified with Hexadecyltrimethoxysilane (HDMTS) and KH570, the cured film prepared by KH570 modified TiO2 had the best physical and mechanical properties