In this work, a nano-sized TiO~2-SiO~2 suspension solution was prepared by the precipitation of TiO~2 on silica particles of silica sol. The contribution of polymerically dispersed agent to the stability of suspension was investigated in detail. It was found that the dispersed agent of polyoxypropylene amine adsorbed on silica particles protected the agglomeration and stabilize silica sol. The hydrolysis of titanic ester-butanol-sulphuric acid is a reversible reaction in the origin silica sol, which decreased the controlling crystallinity of TiO~2, resulting in the precipitation of TiO~2 on origin silica particle. In the process of precipitation, the polyamine underwent ionic reaction in the tacidic conditions to form cationic circumstance annulus surrounding the complex nanoparticle. This double electrical lays reduced the aggregation or agglomeration and the core-shell complex nano balls composed of TiO~2-SiO~2 were synthesized.

Key words: SILICON DIOXIDE, NANOPHASE MATERIALS, HIGHPOLYMER, ADSORPTION, TITANIUM DIOXIDE, POLYETHERAMINE