文献类型：期刊文献

英文题名：Preparation of core-shell polystyrene/silica composite microspheres and hollow silica spheres

作者：Yang, XL; Zhu, YH; Zhu, MQ; Li, CZ

机构：[1]E China Univ Sci & Technol, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2003

卷号：18

期号：6

起止页码：1293

外文期刊名：JOURNAL OF INORGANIC MATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000187912100025)】；

语种：英文

外文关键词：self-assembly; PS/SiO2 composite microspheres; hollow silica spheres

摘要：The core-shell polystyrene/silica composite microspheres with tailored dimensions and compositions were prepared by layer-by-layer self-assembling. The polymer cores were removed by calcination and hollow silica spheres with tailored wall thickness were produced. TEM photographs showed that silica nanoparticles formed a uniform shell round the core, which turned into a clear-cut hollow sphere after calcination. TG revealed that silica content within the composite microspheres increased with the assembled nano silica diameter. Both the successful assembly of SiO2 and the complete removal of PS can be verified by FIIR comparison of PS, SiO2, composite microspheres and the powders after heating treatment. With the same number layers of nanoparticles adsorpted on the, latex cores, the larger the selected SiO2 nanoparticles diameter (10nm, 20nm, 40nm), the larger the composite microspheres diameter, and the thicker the hollow spheres' wall.