中文摘要：

采用无皂乳液聚合法制备了单分散、直径为170 nm左右的聚甲基丙烯酸甲酯（PMMA）纳米球,然后利用3-甲基丙烯酰氧基丙基三甲氧基硅烷（MATS）和3-巯丙基三甲氧基硅烷（MPTMS）对PMMA纳米球进行表面改性,在其表面包覆一层均匀的巯基,通过巯基与银离子之间的相互作用,使银在PMMA纳米球表面成核长大,从而合成PMMA/Ag纳米球壳粒子.通过扫描电子显微镜、投射电子显微镜和紫外-可见吸收光谱测试技术对产物性能进行了表征,研究结果表明,制备的PMMA/Ag纳米球壳粒子的分散性好、包覆均匀.

英文摘要：

In this paper, we reported a two-step technique for fabrication of PMMA/Ag nano coreshell structure with well-established processing parameters and an ease control. Firstly, we fabricated the monodisperse PMMA nanospheres with a diameter of about 170 nm by emulsifier-free emulsion polymerization. Then, we modified the PMMA nanospheres surface with （3-methacryloxypropyl） trimethoxysilane （MATS） and （3-mercaptopropyl） trimethoxysilane（ MPTMS）, resulting in a uniform sulfhydryl （SH）-group modified outlayer and Ag nanoparticles further grew on the modified surface of PMMA nanospheres with an effective interaction between sulfhydryl（SH） groups and Ag^ ＋. In doing so, finally we synthesized PMMA/Ag core-shell composited nanoparticles. The structure of the synthesized sample was investigated by scanning electron microscopy （SEM） , transmission electron microscopy （TEM） and UV-Vis extinction spectra. The results indicate that the well-dispersed PMMA/Ag core-shell nanoparticles with uniform particle size distribution were successfully fabricated using this improved technique.