SURFACE MODIFICATION OF CaCO_3 WITH DENDRITIC CARBOXYLIC ACIDS  

作　　者：Zhao-xia Guo Jian Yu Institute of Polymer Science and Engineering Department of Chemical Engineering Tsinghua University Beijing 100084 China 

出　　处：《Chinese Journal of Polymer Science》2002年第3期231-235,共5页高分子科学（英文版）

基　　金：This work was supported by Tsinghua-Zhongda Postdoctoral Science Foundation and China Postdoctoral Science Foundation.

摘　　要：Nanometer calcium carbonate was modified with Frechet type polyether dendrons bearing a COOH group at thefocal point by a wet-coating technique in dichloromethane at room temperature. The interaction between CaCO;and thedendritic modifier was proven by IR and mass spectroscopy of the modified CaCO;after thorough extraction withdichloromethane. The amount of tightly bonded organic modifier was estimated by TGA. It was shown that the amount ofbonded molecules decreased with increasing generation number due to the larger number of branches. Compared tounmodified CaCO;, the modified CaCO;possess different dispersibility in water and in organic solvents.Nanometer calcium carbonate was modified with Frechet type polyether dendrons bearing a COOH group at the focal point by a wet-coating technique in dichloromethane at room temperature. The interaction between CaCO3 and the dendritic modifier was proven by IR and mass spectroscopy of the modified CaCO3 after thorough extraction with dichloromethane. The amount of tightly bonded organic modifier was estimated by TGA. It was shown that the amount of bonded molecules decreased with increasing generation number due to the larger number of branches. Compared to unmodified CaCO3, the modified CaCO3 possess different dispersibility in water and in organic solvents.

关 键 词：calcium carbonate surface modification polyether dendrimer dendritic carboxylic acid 

分 类 号：TQ316.6[化学工程—高聚物工业]