Isotherm Adsorption of Acrylic Acid/Acrylate Ester Copolymers on Nanosized Y-TZP Powders

The adsorption of an acrylic copolymer on nanosized Y-TZP powder was characterized by the method of COD (chemical oxygen demand). The adsorption density decreases with increasing pH and copolymer concentration. An increase in KNO3 concentration causes a considerable increase in adsorption density in alkaline region, but has no effect on the adsorption density in acidic region. The adsorption density in alkaline region increases profoundly in the presence of Ca2+ due to the complexation of Ca2+ with the copolymer. FTIR results show the existence of chemical interaction between the metal ions on the powder surface and the carboxylic acid groups of the copolymer.