WANG Jianrong^a,SHI Jie^b,GUAN Fang^b,HOU Pengkun^b

(a.School of Materials Science and Engineering;b.Shandong Provincial Key Lab for the Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China)

Abstract：Due to the particle agglomeration phenomenon of nano-SiO2,the particle size distribution and dispersion of nano-SiO2 powder in cement liquid phase were studied by means of LS13320 laser particle size,SEM and TEM.Nano-SiO2 powder was dispersed by ultrasonic pulse technology and the optimal ultrasonic power was determined.The effect of surfactant addition sequence on the particle size distribution of nano-SiO2 in cement liquid phase was studied.The results show that the synergistic effect of ultrasonic pulse and surfactant is the best dispersion method of nano-SiO2.The experimental conditions for obtaining the optimal nano-SiO2 particle size distribution are 5 min ultrasonic time and 360 W ultrasonic power.Surfactant is added to the cement liquid phase after the addition of nano-SiO2,which is more conducive to the dispersion of nano-SiO2.

Keywords：nano-SiO2; cement liquid phase; dispersion; ultrasonic pulse; surfactant

中图分类号：TQ172.1+6

文献标志码：A

文章编号：1008-5548(2021)01-0090-07

DOI：10.13732/j.issn.1008-5548.2021.01.011

收稿日期：2020-06-27，修回日期：2020-09-21，在线出版时间：2020-11-02 10:36。

基金项目：国家自然科学基金项目,编号:51672107;山东省科技重大专项(新兴产业)项目,编号:2015ZDXX0702B01。

第一作者简介：王建荣(1966—),女,学士,高级实验师,研究方向为粉体合成与应用研究。E-mail:mse_wangjr@ujn.edu.cn。