LIU Xiaohong1 ， PAN Yifan2 ， MAO Yanhong1
（1. School of Resource Environmental and Chemical Engineering， Nanchang University， Nanchan 330031， China； 2. Chongqing Tongliang Electric Power Company， Chongqing 402560， China）
Abstract：By adding L-lysine amino acid in nano-sized CaCO3 slurry, it could introduce active groups such as carboxyl and amino on the surface of nano-sized CaCO3 particles to realize the surface modification. The mechanism of modification was studied by FTIR, XRD, SEM and TGA. Results indicate that L-lysine acid is grafted onto the surface of nano-sized CaCO3 particles in the form of chemical. The modified nano-sized CaCO3 particles is good in dispersion and increases interplanar distance. The optimum process conditions of L-lysine amino acid grafting nano-sized CaCO3 particles are that the mass fraction of CaCO3 in slurry is 8%~10%, the mass ratio of L-lysine to nano-sized CaCO3 particles is 0.1, modification temperature is 70 ℃, time is 70 min.Under the optimized condition, the activation degree of modified nano-sizde CaCO3 is 46.3%.
Keywords: CaCO3 nano-particles; surface modification; L-lysine amino acid; activation degree
文章编号：1008-5548（2016）03-0086-05
DOI：10.13732/j.issn.1008-5548.2016.03.017
收稿日期：2015-07-13，修回日期：2016-05-17，在线出版时间：2016-06-22。
第一作者简介：刘晓红（1963—），女，教授，硕士生导师，研究方向为化工过程新工艺、新技术的开发。E-mail：liu3050@163.com。
