LIU Qing^1a,CHEN Chao²,YANG Ji^1a,WANG Haishui^1b

(1a. Analytical and Testing Center,1b. School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou 510640,China; 2. College of Life Sciences,South China Agricultural University,Guangzhou 510642,China)

Abstract: In order to sovle the problem of the precision of the results obtained by the existed methods from water absorption and expansion of montmorillonite,and breaking in its layered structure under severe conditions,we established the method with good precisions of laser light scattering method. The effects of ultrasonic time,stirring time,stirring rate and dispersing time on particle sizes were investigated. The results show that ultrasonic and high speed agitation are not suitable for dispersing montmorillonite particles. Under the conditions of moderate stirring rate between 450 and 1 600 r/min,proper dispersing time of 1 min,and measurement within 2 min,the particle size results with good repeatabilities can be obtained and the results are similar to those obtained by scanning electron microscope.

Keywords: montmorillonite; laser light scattering method; particle size analysis; precision

中图分类号：O657.3                              文献标志码：A

文章编号：1008-5548(2020)01-0041-05

DOI:10.13732/j.issn.1008-5548.2020.01.007

收稿日期： 2019-05-29，修回日期：2019-07-04，在线出版时间：2019-07-26 08:40。

基金项目：国家自然科学基金，编号：21773072；广东省普通高校青年创新人才项目，编号：2018KQNCX005。

第一作者简介：柳青(1986—)，女，博士，工程师，研究方向为晶体合成与粒度分析。E-mail：czliuqing@scut.edu.cn。

通信作者简介：王海水(1963—)，男，教授，博士生导师。E-mail：wanghsh@scut.edu.cn。