ZHU Gengzeng，LI Wenjing，WANG Xiaoming，LI Xingeng，JIANG Bo

(Electric Power Science Research Institute，State Grid Shandong Electric Power Company，Jinan 250002，China)

Abstract: In order to improve the dispersion of micron silica in practical application，in a high boiling point n-butanol dispersant, the surface grafting modification of micron silica was carried out with the coupling agent aminopropyl triethoxylsilane. The effects of reaction time, reaction temperature and the amount of coupling agent on the modification effect of micron silica were studied. The modified particles were characterized by Fourier infrared spectrometer, contact angle test and field emission scanning electron microscope. The results show that when the reaction time is 6 h, the reaction temperature is 90 ℃, and the mass fraction of the coupling agent is 11%, the contact angle of the modified micron silica reaches 153 °, and the dispersion is the best.

Keywords: micron silica；silane coupling agent；grafting modification；contact angle

中图分类号：TB321                           文献标志码：A

文章编号：1008-5548(2020)04-0033-05

DOI:10.13732/j.issn.1008-5548.2020.04.006

收稿日期:2020-01-06,修回日期:2020-03-03，在线出版时间：2020-05-07 15:07。

基金项目:国家电网公司重点科技项目，编号:520626170025。

第一作者简介:朱耿增(1991-),男，硕士，研究方向为粉体材料改性及高分子复合材料制备。E-mail:gengrenghu@163.com.

通信作者简介:李辛庚(1962一)，男，教授，高级工程师，研究方向为电网材料腐蚀与防护。E-mail:840182744@qq.com。