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Effect of Polymer Molecular Weight on the Adsorption of Polyacrylic Acid at the Alumina-Water Interface

Published

Author(s)

D Santhiya, G Nandini, K A. Natarajan, S G. Malghan

Abstract

The adsorption and electrokinetic characteristics of alumina suspensions in the presence of polyacrylic acid as a dispersant have been studied. The adsorption isotherms exhibit high-affinity Langmuirian behavior. The adsorption density decreases with increasing in pH, while it increases with increasing molecular weight of the polymer. Electrokinetic studies indicate specific adsorption at and above the isoelectric point of the alumina sample. Possible mechanisms of interaction between alumina and polyacrylic acid are discussed.
Citation
Colloids and Surfaces B-Biointerfaces
Volume
133

Keywords

adsorption, alpha-alumina, electrokinetic characteristics, electrostatic and chemical interaction, hydrogen bonding, PAA, polyacrylic acid

Citation

Santhiya, D. , Nandini, G. , Natarajan, K. and Malghan, S. (1998), Effect of Polymer Molecular Weight on the Adsorption of Polyacrylic Acid at the Alumina-Water Interface, Colloids and Surfaces B-Biointerfaces (Accessed April 14, 2024)
Created October 31, 1998, Updated October 12, 2021