中文摘要：

首先以苯乙烯（St）及3-甲基丙烯酰氧基三甲氧基硅烷（MPS）为反应单体,通过细乳液聚合制备表面功能化聚硅氧烷微球,然后利用该微球表面的硅羟基及硅氧烷基团对Ag＋的吸附及还原作用原位制备聚硅氧烷-Ag纳米复合微球。采用透射电镜（TEM）、紫外（UV-Vis）、热重分析（TG）及X射线衍射（XRD）等对聚硅氧烷-Ag纳米复合微球的形貌和组成进行了表征。研究表明：改变MPS和硝酸银的用量可调控聚硅氧烷-Ag纳米复合微球的形貌及表面银含量;抗菌实验结果表明,聚硅氧烷-Ag纳米复合微球具有较好的抑菌性。

英文摘要：

Surface functionalized polysiloxane microspheres were synthesized by mini-emulsion polymerization withβ-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.