摘要
针对纳米SiO2存在颗粒团聚现象,借助LS13320激光粒度仪、SEM和TEM测试手段,研究水泥液相中纳米SiO2粉体的粒度分布及其分散性。通过超声脉冲技术分散纳米SiO2粉体,并确定最优超声功率;研究表面活性剂添加顺序对水泥液相中纳米SiO2粒度分布的影响。结果表明:超声脉冲与表面活性剂协同作用为纳米SiO2最佳分散方式;获得纳米SiO2最佳粒度分布的实验条件为超声时间5 min、超声功率360 W;在纳米SiO2加入到水泥液相之后再加入表面活性剂,这种添加顺序更有利于提高纳米SiO2分散性。
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.
作者
王建荣
石捷
关芳
侯鹏坤
WANG Jianrong;SHI Jie;GUAN Fang;HOU Pengkun(School of Materials Science and Engineering,University of Jinan,Jinan 250022,China;Shandong Provincial Key Lab for the Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China)
出处
《中国粉体技术》
CAS
CSCD
2021年第1期90-96,共7页
China Powder Science and Technology
基金
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。
