Wet Surface Modification of Light Calcium Carbonate Powder by Aluminate Coupling Agent
The modification of light calcium carbonate powder was studied by wet surface modification in n-Butanol and water solution. The modification process was analyzed by modifying temperature, rotation speed, aluminate coupling agent dosage and n-Butanol percentage. The characters of modified calcium carbonate were investigated by the contact angles with water/glycerol/liquid paraffin/DOP and infrared spectroscopy (IR). The contact angles/water of modified CaCO3 powder obtained in optimum conditions was 134.5°. The results indicated that the surface property of CaCO3 powder changed from the hydrophilicity to the lipophilicity.
Yansheng Yin and Xin Wang
L. C. Li and Y. Zhang, "Wet Surface Modification of Light Calcium Carbonate Powder by Aluminate Coupling Agent", Advanced Materials Research, Vols. 79-82, pp. 1967-1970, 2009