酸活化处理是提高蛭石表面酸性的主要方法之一。目前的相关研究对酸活化过程中蛭石的微结构演化规律及其对蛭石表面酸性的影响机制仍缺乏深入的认识。为此，本项目拟围绕“酸化蛭石微结构演化及其对表面酸性的影响”这一科学问题，以不同电荷密度的蛭石及其在不同酸化条件下的产物为研究对象，采用谱学和表面分析等技术研究酸化蛭石的微结构特征和表面酸性，重点采用核磁共振谱探测Si、Al原子局域结构环境特征，以及分子探针红外光谱法和正丁胺滴定法等测定酸化蛭石表面酸位的类型、强度和酸量，阐明酸化蛭石微结构演化与表面酸性之间的构-效关系，为蛭石矿物资源的高附加值利用提供理论基础和实验依据。

Acid activation is one of the main methods to increase the surface acidity of vermiculite. So far little knowledge about the relationship between the micro-structural evolution of the acid activated vermiculite and its surface acidity has been acquired. In this project, systematic investigation will be carried out to study the scientific problem about the effect of microstructure evolution of acid activated vermiculite on its surface acidity. Vermiculites with different charge densities will be used as the raw minerals and treated at different acid conditions. Their microstructure and surface acidity characters will be investigated by various micro analysis techniques. The local structures of Si and Al atoms of samples are probed with emphases by NMR, while the types, strength, and concentration of the solid acid sites are detected by molecular probe FTIR and the Hammett indicators titration method. The structure-activity relationship between the micro-structure evolution and surface acidity of the acid activated vermiculites will be discussed. The obtained results are of high importance for the increase of vermiculite resources and their implication.