WU Jianghong, DU Zhiping, TAI Xiumei, ZHAO Yonghong, WANG Tianzhuang
（Nanotechnology Applied Engineering Research Center of Shanxi Province, China Research Institute of Daily Chemical Industry, Taiyuan 030001, China）
Abstract：SiO2 nano-particles suspension was synthesized by modified sol-gel method with tetraethyl orthosilicate as raw materials. SiO2 nanoparticles were in-situ modified by vinyltris (β-methoxyethoxy) silane. The effect of factors, such as mass fraction of vinyltris (β-methoxyethoxy) silane, reaction time,reaction temperature on the oil-affinity degree and water-sorption ratio was investigated. The samples before and after modification were characterized by UV-Vis, FTIR, TEM and water contact angle. The results show that dispersion properties of the modified SiO2 nano-particles are improved obviously and the hydrophobicity is also increased apparently. The optimum surface modification conditions are determined that the dosage of vinyltris(β-methoxyethoxy) silane is 8% of total solvent dosage,reflux reaction time is 6 h at 78 ℃.
Keywords：vinyltris(β-methoxyethoxy) silane; SiO2 nano-particles; in-situ modification
中图分类号：TQ127， TB383 文献标志码：A
文章编号：1008-5548（2013）04-0005-05
DOI：10.3969/j.issn.1008-5548.2013.04.002
收稿日期：2012-09-18，修回日期：2012-10-24，在线出版时间：2013-08-25。
基金项目：山西省研究生优秀创新项目，编号：0113127。
第一作者简介：武江红（1987—），女，硕士研究生，研究方向为有机-无机复合材料的制备及性能。 E-mail:wujianghong2006@126.com。
通信作者简介：杜志平（1958—），女，教授，博士生导师，研究方向为从事 有 机-无机复合材料的制备及性能。 电 话：0351-4084691， E-mail:zhipingdu@hotmail.com。
