【摘要】 利用无皂聚合和乳液聚合,制备了聚苯乙烯-甲基丙烯酸胶体模板.聚苯乙烯-甲基丙烯酸胶体模板粒径分别控制为363,349,160和56 nm,实现了模板粒径的可控制备.利用制备的聚苯乙烯-甲基丙烯酸系列胶体模板,以偏硅酸钠为前驱体,煅烧去除模板后,制备了不同粒径及壁厚的二氧化硅空心微球.所制备的样品粒径在69～405 nm之间,壁厚在11～27 nm之间变化.利用扫描电子显微镜、透射电子显微镜和傅立叶变换红外光谱仪,对乳液模板、核壳复合材料及二氧化硅空心球形貌进行了表征,提出了聚苯乙烯-甲基丙烯酸模板与二氧化硅空心微球粒径调控的有效方法.更多还原

【Abstract】 The polystyrene-methacrylic acid latex templates were prepared by emulsifier-free and emulsifier emulsion polymerization.The average diameters of the polystyrene-methacrylic acid latex templates were respectively controlled at 363,349,160 and 56 nm to realize controllable preparation of polystyrene-methylacrylic acid latex templates.Whereafter,the hollow silica microspheres with various grain size and shell thickness were prepared after calcination to remove the templates with polystyrene-methylacrylic acid latexes as templates and sodium silicate as precursor.The diameters of the silica hollow microspheres range from 69 to 405 nm with the shell thicknesses from 11 to 27 nm.The latex templates,core-shell composites and silica hollow spheres were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM) and FT-infrared spectroscopy(FT-IR).An effective method for controllable preparation of polystyrene-methylacrylic acid latex templates and silica hollow spheres was proposed.更多还原