Preparation and characterization of surface modified silica nanoparticles with organo-silane compounds

► Surface modified silica particles were prepared through a continuous sol-gel process. ► The organic chains were introduced on the surface of the silica particles. ► The introduction effects of organic chains were the variations of surface properties. ► The hydrophilicity of silica particles was changed by the organic chains. ► The pH dependency of the surface charge was changed by the organic chains.