碳酸钙表面改性及在水介质中的聚团行为

发布时间：2018-05-08 23:00

本文选题：疏水聚团 + 碳酸钙　；参考：《中国粉体技术》2017年06期

【摘要】：为了实现碳酸钙颗粒在水中聚团,实现碳酸钙固液分离及与其他物质的分离,通过测量颗粒的沉降指数和观察颗粒的显微图像,对硬脂酸钠改性碳酸钙颗粒在水介质中的聚团行为及其机理进行研究。结果表明,碳酸钙表面诱导疏水性是导致其颗粒聚团的主要因素,与未改性碳酸钙相比,改性碳酸钙颗粒在水介质中形成大尺度聚团,并具有一定强度;推测改性碳酸钙颗粒间的聚团应为颗粒表面改性剂碳链间的缔合所形成。
[Abstract]:In order to realize the aggregation of calcium carbonate particles in water, solid liquid separation of calcium carbonate and separation from other substances, the sedimentation index of the particles was measured and the microscopic images of the particles were observed. The agglomeration behavior and mechanism of calcium carbonate modified by sodium stearate in water medium were studied. The results show that the hydrophobicity induced by the surface of calcium carbonate is the main factor leading to the aggregation of calcium carbonate particles. Compared with the unmodified calcium carbonate, the modified calcium carbonate particles form large scale clusters in water medium and have a certain strength. It is inferred that the cluster between the modified calcium carbonate particles should be formed by the association between the carbon chains of the surface modifier.
【作者单位】：中国地质大学(北京)材料科学与工程学院;
【基金】：国家自然科学基金项目,编号:51474194
【分类号】：TQ132.32

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