YAN Haowei, CUI Jiarui, ZHANG Zepeng

(School of Materials Science and Engineering, China University of Geosciences (Beijing), Beijing 100083, China)

Abstract: The calcium-based montmorillonite ore from four different origins were used as raw material to carry out interlayer cation exchange with six different valence metal cations to prepare montmorillonite and its suspension. The effects of different valence interlayer cations on the structure, appearance, Zeta potential, dispersion state and gel performance of montmorillonite were studied. The results show that the montmorillonite raw material have little effect on the gel performance of montmorillonite. The hydrated ionic radius of montmorillonite with low-cost interlayer cations is larger, the Zeta potential value is higher and the dispersion of the suspension is better. The viscosity value is larger, the gel performance is better. For the cation smectite with same valence state, the larger its hydrated ionic radius is, the better its gel performance is.

Keywords: Montmorillonite; interlayer cation; gel performance

中图分类号：TD985

文献标志码：A

收稿日期： 2018-12-13，修回日期:2019-01-19，在线出版时间：2019-01-22 17:06。

基金项目：国家重点研发计划重点专项，编号：2017YFB0310901。

第一作者简介：严昊炜(1995—)，男，硕士研究生。研究方向为无机矿物凝胶。E-mail：616732098@qq.com。

通信作者简介：张泽朋(1960—)，女，博士，教授，硕(博)士生导师。研究方向为矿物材料改性及应用、复合材料制备及应用。E-mail：zhangzp@cugb.edu.cn。

文章编号：1008-5548(2019)03-0048-07

DOI:10.13732/j.issn.1008-5548.2019.03.009