原位聚合SiO2/PSSS纳米复合粒子的制备及其性能

以γ-（甲基丙烯酰氧）丙基三甲氧基硅烷（KH-570）对溶胶凝胶制备得到的纳米SiO2进行表面接枝改性，然后通过原位聚合制备二氧化硅/聚对苯乙烯磺酸钠（SiO2/PSSS）纳米复合粒子。研究了对苯乙烯磺酸钠（SSS）和过硫酸铵（APS）用量对SiO2/PSSS纳米复合粒子粒径的影响，探讨了SiO2/PSSS纳米复合粒子在水相中的分散稳定性。结果表明当SSS占SiO2质量分数的25%，引发剂APS占SSS质量分数的1.5%时，得到SiO2/PSSS纳米复合粒子的粒径为150nm；红外光谱（FTIR）和透射电镜（TEM）测试结果表明纳米SiO2表面成功包覆了PSSS，热失重（TGA）分析表明SiO2表面包覆聚合物的量约占其总重的27.5%，SiO2/PSSS纳米复合粒子在水相中具有良好的分散稳定性。

Preparation of nanoscale SiO2/PSSS composite particles by in-situ polymerization and their properties

Abstract： The nanoscale SiO2 is modified by KH-570 and then copolymerized with sodium styrene sulfonate (SSS) to prepare the nanoscale SiO2/PSSS composite particles via in-situ polymerization. It was investigated the effects of the amount of SSS, ammonium persulphate (APS) on particle size of the nanoscale SiO2/PSSS composite particles. The results showed that the particle size of SiO2/PSSS composite particles was 150nm when the weight ratio of SSS to SiO2 was 25% and APS to SSS was 1.5%. FTIR and TEM indicated that the nanoscale SiO2 was coated by PSSS, and the weight ratio of polymer was 27.5% measured by TGA. SiO2/PSSS composite particle has excellent stability in aqueous media..