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

被引：60

作者：

Santhiya, D

Nandini, G

Subramanian, S

Natarajan, KA

Malghan, SG ^{[1
]}

机构：

[1] NIST, Div Ceram, Gaithersburg, MD 20899 USA

[2] Indian Inst Sci, Dept Met, Bangalore 560012, Karnataka, India

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1998年 / 133卷 / 1-2期

关键词：

adsorption; alpha-alumina; electrokinetic; electrostatic and chemical interaction; hydrogen bonding; polyacrylic acid (PAA);

D O I：

10.1016/S0927-7757(97)00132-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 1998 Elsevier Science B.V.

引用

页码：157 / 163

页数：7

共 36 条

[1] ADSORPTION OF WEAK POLYELECTROLYTES ON HIGHLY CHARGED SURFACES - POLY(ACRYLIC ACID) ON POLYSTYRENE LATEX WITH STRONG CATIONIC GROUPS [J].