EFFECT OF POLYMER MOLECULAR-WEIGHT ON THE ADSORPTION OF POLYACRYLIC-ACID AT THE ALUMINA-WATER INTERFACE

Authors
SANTHIYA D NANDINI G SUBRAMANIAN S NATARAJAN KA MALGHAN SG
Citation
D. Santhiya et al., EFFECT OF POLYMER MOLECULAR-WEIGHT ON THE ADSORPTION OF POLYACRYLIC-ACID AT THE ALUMINA-WATER INTERFACE, Colloids and surfaces. A, Physicochemical and engineering aspects, 133(1-2), 1998, pp. 157-163
Citations number
36
Categorie Soggetti
Chemistry Physical
Journal title
Colloids and surfaces. A, Physicochemical and engineering aspects → ACNP
ISSN journal
09277757
Volume
133
Issue
1-2
Year of publication
1998
Pages
157 - 163
Database
ISI
SICI code
0927-7757(1998)133:1-2<157:EOPMOT>2.0.ZU;2-R
Abstract
The adsorption and electrokinetic characteristics of alumina suspensio ns in the presence of polyacrylic acid as a dispersant have been studi ed. The adsorption isotherms exhibit high-affinity Langmuirian behavio ur. The adsorption density decreases with increasing in pH, while it i ncreases with increasing molecular weight of the polymer. Electrokinet ic studies indicate specific adsorption at and above the isoelectric p oint of the alumina sample. Possible mechanisms of interaction between alumina and polyacrylic acid are discussed. (C) 1998 Elsevier Science B.V.