文献类型：期刊文献

中文题名：以纳米球形聚电解质刷为模板制备PS/SiO_2核-壳纳米杂化粒子和SiO_2空心微球

英文题名：Preparation of PS/SiO_2 Core-Shell Nanoparticles and SiO_2 Hollow Microspheres Using Nano-Sized Spherical Polyelectrolyte Brushes as Template

作者：黄世斌[1];董亚明[2];郭旭虹[1]

机构：[1]华东理工大学化学工程联合国家重点实验室,上海200237;[2]上海师范大学生命与环境科学学院,上海200234

年份：2011

卷号：37

期号：6

起止页码：655

中文期刊名：华东理工大学学报（自然科学版）

外文期刊名：Journal of East China University of Science and Technology

收录：CSTPCD;;Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金面上项目(20774028);上海市科委基础研究重点项目(10JC1403800)

语种：中文

中文关键词：纳米球形聚电解质刷;SiO2空心微球;溶胶-凝胶;pH响应

外文关键词：spherical polyelectrolyte brushes SiO2 hollow microsphere sol-gel pH-sensibility

摘要：报道了一种以纳米球形聚电解质刷为模板,采用溶胶-凝胶法制备聚苯乙烯/二氧化硅(PS/SiO2)纳米核-壳粒子,并用有机溶剂除去PS核后得到SiO2空心微球的新方法。首先采用光乳液聚合方法制备以PS为核的纳米球形聚丙烯酸(PAA)刷,然后以其为模板采用St ber方法在PS核表面沉积上厚度均匀的SiO2壳层。由于壳层中PAA链的存在,使得该有机/无机纳米杂化粒子具有pH响应性。该方法为制备活性物质(如药物)控释载体开辟了一条新途径。
Polystyrene/silica （PS/SiO2） core-shell nanoparticles （CSNs） were synthesized using nanosized spherical polyelectrolyte brushes （SPBs） as templates by sol-gel method. SiOz hollow microspheres were obtained after removing PS cores by solvent. The SPBs consisting of poly（acrylic acid） （PAA） chains covalently attached densely onto the surface of PS cores were prepared by photo-emulsion polymerization. Following the Stober method, a uniform SiO2 shell was formed on the surface of PS core using SPBs as templates. The PS/SiO2 CSNs display pH-sensibility due to the existing of PAA chains in the periphery of nanoparticles. The SiOz hollow microspheres prepared by removing of PS cores with chloroform show narrow size distribution. This approach opens a new way to prepare organic/inorganic hybrid core-shell and hollow nanoparticles for broad applications such as drug delivering.