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Effect of polymer molecular weight on the adsorption of polyacrylic acid at the alumina-water interface

Santhiya, D and Nandini, G and Subramanian, S and Natarajan, KA and Malghan, SG (1998) Effect of polymer molecular weight on the adsorption of polyacrylic acid at the alumina-water interface. In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, 133 (1-2). pp. 1572-163.

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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 behaviour. 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.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Adsorption; α-Alumina; Electrokinetic; Electrostatic and chemical interaction; Hydrogen bonding; Polyacrylic acid (PAA)
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited: 02 Jun 2009 06:44
Last Modified: 19 Sep 2010 05:02
URI: http://eprints.iisc.ernet.in/id/eprint/18468

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