硬脂酸改性纳米碳酸钙表面研究
Study on Surface Modification of Nano-meter Calcium Carbonate With Stearic Acid
马梦绮 1武志鹏 1胡跃鑫 1韩向艳1
作者信息
- 1. 辽宁石油化工大学,辽宁 抚顺 113001
- 折叠
摘要
为了改善纳米碳酸钙(nano-CaCO3)在基体中的分散情况,采用硬脂酸对nano-CaCO3 表面进行改性,通过改变硬脂酸用量、反应温度、反应时间、浆料质量浓度,测定反应前后nano-CaCO3 的活化度和吸油值,进而确定最佳反应条件.结果表明:硬脂酸可以改性 nano-CaCO3,其最好的改性条件为硬脂酸质量分数 4%,浆料质量浓度 90 g·L-1,反应温度为 60～80℃,反应时间为 50～60 min.红外光谱显示硬脂酸与nano-CaCO3之间形成了牢固的化学键,扫描电镜观察到用硬脂酸处理过的nano-CaCO3 可减少在基体中团聚,有助于其在基体中分散.
Abstract
In order to improve the dispersion of nano-CaCO3 in matrix,the surface of nano-CaCO3 was modified by stearic acid.The activation degree and oil absorption value of modified nano-CaCO3 were determined by changing the amount of stearic acid,reaction temperature and reaction time,slurry mass concentration.Then the best modification conditions were determined.The experimental results showed that nano-CaCO3 could be modified by stearic acid,and the best experimental modification conditions were as follows:stearic acid mass fraction 4%,slurry mass concentration 90 g·L-1,modification temperature 60～80℃,modification time 50～60 min.The fourier transform infrared spectroscopy showed that stearic acid formed a strong chemical bond with nano-CaCO3,and scanning electron microscopy observed that the modified nano-CaCO3 could reduce the aggregation and contribute to its dispersion in the matrix.
关键词
纳米碳酸钙/硬脂酸/分散/吸油值Key words
Nanometer calcium carbonate/Stearic acid/Dispersion/Activation degree/Oil absorption引用本文复制引用
基金项目
辽宁省教育厅科学研究一般项目(L2020006)
出版年
2024
NETL
NSTL
万方数据