人工晶体学报2013，Vol.42Issue(5)：938-944,7.
乳液聚合法制备纳米SiO2/PMMA复合粒子及其表征
Preparation and Characterization of Nano-SiO2/PMMA Composite Particles by Emulsion Polymerization
摘要
Abstract
The nano-SiO2/PMMA composite particles with core-shell structure were prepared by emulsion polymerization on the surface of nano-SiO2 using a polymerizable emulsifier(SE-10).The particles morphology and encapsulation effect were characterized by FTIR,TEM,XPS and TGA.The results indicated that the coupling agent MPTMS was grafted to the surface of modified nano-SiO2 and the spectra presented the composite structure of PMMA and nano-SiO2 without changing the structure of original nano-SiO2.The diameter of the composite particles was about 50-100 nm,the morphology had the core-shell structure with light outer part and dark inner part.The XPS analysis exhibited that the Si content on the surface decreased rapidly to 1.29％ after nano-SiO2 was encapsulated by PMMA.After the nano-SiO2/PMMA composite particles were extracted by toluene,the Si content increased to 3.50％.Basing on the Soxhlet extraction experiments and TGA result,the ratio of PMMA to original nano-SiO2 (fp),the grafting ratio of PMMA to original nanoSiO2(fr) and efficiency grafting ratio of PMMA (fe) were respectively about 95.8％,63.4％ and 67.1％.关键词
乳液聚合/纳米复合粒子/核壳结构/聚甲基丙烯酸甲酯(PMMA)Key words
emulsion polymerization/ nanocomposite particles/ core-shell structure/ poly(methyl methacrylate)分类
化学化工引用本文复制引用
黄增芳,瞿晓岳,陈正..乳液聚合法制备纳米SiO2/PMMA复合粒子及其表征[J].人工晶体学报,2013,42(5):938-944,7.基金项目
Natural Science Foundation of Guangdong Province(9452840301003542) （9452840301003542）
Science and Technology Project of Zhongshan City of China(20092A203) （20092A203）
