原位聚合SiO_2/PSSS纳米复合粒子的制备及其性能

Preparation of nanoscale SiO_2/PSSS composite particles by in-situ polymerization and their properties

以γ-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH-570)对溶胶凝胶法制备的纳米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。当SSS占SiO2质量分数的25%,引发剂APS占SSS质量分数的1.5%时,SiO2/PSSS纳米复合粒子的粒径为150 nm。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。

Graft modification with KH-570 was carried out on the surface of the nanoscale SiO2 which was prepared by sol-gel process and then the modified SiO2 was copolymerized with sodium styrene sulfonate （SSS） to prepare the nanoscale SiO2/PSSS composite particles via in-situ polymerization. The effects of the amount of SSS and ammonium persulphate （APS） on the particle size of the nanoscale SiOJPSSS composite particles were investigated, as well as the dispersing stability of SiO2/PSSS in aqueous media. The results showed that the particle size of SiO2/PSSS composite particles was 150 nm when the weight ratio of SSS to SiO2 was 25% and APS to SSS was 1.5%. FTIR and TEM analysis indicated that the nanoscale SiO2 was coated by PSSS, and the weight ratio of polymer was 27. 5% measured by TGA. SiO2/PSSS composite particles have excellent dispersing stability in aqueous media.