化工学报2017，Vol.68Issue(1)：430-436,7.DOI:10.11949/j.issn.0438-1157.20160831
SiO2表面原位接枝聚环氧丙烷高分子刷的制备及表征
Preparation and characterization of polypropylene oxide polymer brushes grafted SiO2 by in-situ polymerization
摘要
Abstract
Monodispersed spherical SiO2 particles were successfully prepared by Stober method, and the functional modification of SiO2 was obtained by the reaction of Si—OH with 3-glycidoxypropyltrimethoxysilane (GPS). By using aluminum isopropoxide as a heterogeneous catalyst to initiate in-situ ring-opening polymerization of the propylene oxide (PO) monomers, a polypropylene oxide (PPO) polymer brush grafted SiO2 (PPO-g-SiO2) was obtained. The effects of the amount of monomer, reaction temperature and reaction time on the grafted polymer brushes were discussed. In addition, the chemical structure and morphology of PPO-g-SiO2 and grafted amount were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), scanning electron microscope (SEM) and thermogravimetric analysis (TGA). The results show when the amount of the monomer addition is 2.38 mol·L−1, reaction temperature is 80℃, and reaction time is 24 h, respectively, the PPO graft quantity is up to 23.56%(mass) on SiO2 surface and the thickness is about 15 nm.关键词
二氧化硅/显微结构/化学反应/聚环氧丙烷/开环聚合/高分子刷Key words
silica/microstructure/chemical reaction/polypropylene oxide/ring-opening polymerization/polymer brushes分类
化学化工引用本文复制引用
曹芬,陈可平,田春蓉,林晓艳,梁书恩,贾晓蓉,王建华..SiO2表面原位接枝聚环氧丙烷高分子刷的制备及表征[J].化工学报,2017,68(1):430-436,7.基金项目
国家自然科学基金项目（51273183）；国家自然科学基金委员会与中国工程物理研究院联合基金项目（U1530144）。 （）
