Preparation Of PS/TiO₂Hybridization Core-shell Composite Microspheres

With the development of the nano-technology, the study on material science has been extended to the field of microstructure. Now the focus of research material science is the preparation of a new type of excellent property, nano-level controlled material. Organic-Inorganic hybridization core-shell composite microspheres have the unique capability, because it has the capability of both organic materials and inorganic materials. Besides, the component is different; the properties of the compound microspheres will be changed, so in the practical application is very extensive. How to make the undefiled and functionality organic-inorganic composite microspheres became a challenge topic.In this study, a series of polystyrene microspheres were prepared via soap-less emulsion polymerization. Polystyrene microspheres was sulphonated, absorbed water and then the reaction was happened between sulphonated polystyrene and TiO2in ethanol with TBOT as a reaction precursor, the surface of sulphonated polystyrene microspheres was covered by TiO2,and organic(PS)-inorganic(TiO2) hybridization composite microspheres was acquired. Finally, KH-570was used to make sure surface of composite microspheres with activity, and core (PS)-shell (TiO2)-shell (PMMA) hybridization composite microspheres was obtained by grafting methyl methacrylate (MMA) on composite microspheres surface with soap-less emulsion polymerization.The particle size, structure and morphology of the microspheres were tested by light scattering particle size analyzer、FT-IR、ESEM、TEM and TGA. It was found that in the preparation of PS microspheres; the initiator concentration, ionic strength, the type and amount of latent solvent can affect the latex particles and emulsion stability. Besides, FT-IR、 ESEM、TEM and TGA measurements confirmed the PS/TiO2、microspheres are hybridization core-shell composite microspheres.