蒙脱石酸处理产物的表面结构变化

THE MICROSTRUCTURE OF MONTMORILLONITE ANDITS ACID TREATMENT PRODUCTS

本文对广东和平蒙脱石及其酸处理产物进行了化学分析、X射线粉末衍射分析、红外吸收光谱分析、原子力显微镜及魔角旋转核磁共振等研究。结果表明 ,酸处理浓度对蒙脱石的表面结构有很大的影响。当酸处理浓度达到 2 0 %时 ,蒙脱石硅氧四面体中的 Q3 Si环境发生结构重组 ,有部分转变为畸变的 Q3 Si环境和 Q4 Si环境 ,而 Al的结构状态则没有发生任何变化 ,这与原子力显微镜的观察结果相一致。

The montmorillonite in Heping,Guangdong Province has been studied by means of chemical analysis,XRD,IR,AFM and MAS NMR.It is found that acid treatment is influential on the surface of montmorillonite.When the concentration of acid reaches 20%,there will appear some Q 3 Si structure in montmorillonite transforming to distortion Q 3 Si structure and Q 4 Si structure through structure recombination,and there is no change in Al structure state in the montmorillonite.This is in line with the atomic force microscope observation very well.