SUN Sijia， DING Hao， LIU Kun， CHEN Ying
（School of Materials Science and Technology， China University of Geosciences（Beijing）， Beijing 100083， China）
Abstract：In order to make nano-calcium carbonate (NCC) exhibit dispersed particle characteristics and to improve its functional role, the aggregate behavior and the disaggregation, dispersion characteristics of NCC particles in water medium were studied. The results show that the particle size of NCC is between 50100 nm, and the NCC particles combined strongly to form aggregates, the median diameter d (0.5) and surface area average diameter D [3, 2] are 1.799 μm and 1.412 μm respectively.High-speed agitation and ultrasonic oscillations of NCC suspensions with the addition of sodium polyacrylate CD458 can achieve effective disaggregation and dispersion of NCC aggregates, through which, the D [3, 2] of the disaggregation product decreases to 160 and 146 nm, and the d (0.5) decreases to263 and 158 nm respectively.
Keywords：nano-calcium carbonate; disaggregation; dispersion
文章编号：1008-5548（2018）0４-0012-06
DOI：10.13732/j.issn.1008-5548.2018.04.003
收稿日期：2017-12-26， 修回日期：2018-05-10，在线出版时间：2018-07-04。
基金项目：国家自然科学基金项目，编号 ：51474194。
第一作者简介：孙思佳（1994—），女，博士研究生，研究方向为矿物加工及矿物复合材料。E-mail：468131270@qq.com。
通信作者简介：丁浩（1964—），男，博士，教授，博士生导师，研究方向为矿物加工及矿物复合材料。E-mail：dinghao@cugb.edu.cn。
