利用SiO2引发剂通过表面原子转移自由基聚合（SI-ATRP）的方法,合成了SiO2-grafted PSStNa的纳米复合材料。该纳米复合材料不仅具有核壳结构,而且是表面富集大量负电荷的＂聚电解质刷＂。并用X-射线光电子能谱（XPS）、透射电镜（TEM）和热分析（TGA）等对其进行了表征。%We described the surface-initiated atom transfer radical polymerization （SI-A- TRP） of sodium 4-styrenesulfonate using silica particle bromo-propionyl as macroinitiator to synthesize polymer nanocomposites of core-shell structure. They have the strong charge controlled ＂spherical polyelectrolyte brush＂, a negatively charged polyelectrolyte. These new organic inorganic hybrid particles have been extensively characterized by XPS （X-ray Photoelectron Spectroscopy）, TEM （Transmission Electron Microscopy）, and TGA（Thermo Gravimetric Analysis）.
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