Polysiloxane-Ag Nanocomposite Sphere Fabricated via Mini-emulsion Polymerization and Its Antibacterial Property

Surface functionalized polysiloxane microspheres were synthesized by mini-emulsion polymerization with β-methacryloxy propyltrimethoxy silane(MPS) and styrene(St).Polysiloxane-Ag nanocomposite spheres were prepared by in-situ adsorption and reduction of Ag⁺ with the silanol and siloxane groups on the surface of polysiloxane microspheres.The morphology and component of polysiloxane-Ag nanocomposite spheres were characterized by TEM、UV-Vis、TG and XRD.Results showed that the morphology and the content of Ag on polysiloxane-Ag nanocomposite spheres could be tuned by the amount of MPS and silver nitrate.Furthermore,the polysiloxane-Ag nanocomposite spheres exhibited good antibacterial property.