Abstract： To obtain the products of high quality calcium sulfate whiskers with better hydrophobicity, surface modification of calcium sulfate whiskers during preparation process was investigated using sodium stearate as the surface modifier. The influence of modifier amount and adding style on the effect of modification was studied. The results show that the products are blocky shaped with smaller ratios of length-to-diameter when the mass fraction of sodium stearate is larger than 0.02% before hydrothermal synthesis reaction of calcium sulfate whiskers. Calcium sulfate whiskers with larger ratios of length-to-diameter can be obtained by adding sodium stearate after hydrothermal synthesis reaction of calcium sulfate whiskers . With the increase of modifier amount, the activating indexes increases and the modification effect of calcium sulfate whiskers is better. The adding styles of sodium stearate i.e. adding before and after hydrothermal synthesis reaction have little influence on the modification effect of calcium sulfate whiskers.

Keywords: calcium sulfate whisker; surface modification; activating index

中图分类号：O614.23⁺1，TB321          文献标志码：A

文章编号：1008-5548(2015)02-0035-04

DOI:10.13732/j.issn.1008-5548.2015.02.009

收稿日期：2014-05-02， 修回日期：2014-06-20，在线出版时间：2015-04-17。

基金项目：沈阳市科学技术计划科技攻关计划项目，编号：F12-030-2-00。

第一作者简介：朱一民（1964—），女，教授，研究方向为难选矿选矿及矿物材料的制备与应用。 E-mail：zhuyimin@mail.neu.edu.cn。

通信作者简介：张勇（1989—)，男，硕士研究生，研究方向为矿物材料的制备与应用。 E-mail：yongzhang319@126.com。