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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_3 and thedendritic modifier was proven by IR and mass spectroscopy of the modified CaCO_3 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_3, the modified CaCO_3 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 CaCO_3 and the dendritic modifier was proven by IR and mass spectroscopy of the modified CaCO_3 after thorough extraction 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_3, the modified CaCO_3 possess different dispersibility in water and in organic solvents.