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Kinetics of Simultaneous Adsorption of Poly(vinylpyrrolidone) and Sodium Dodecyl Sulfate on Alumina Particles

โœ Scribed by Kunio Esumi; Mari Iitaka; Kanjiro Torigoe

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
68 KB
Volume
232
Category
Article
ISSN
0021-9797

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โœฆ Synopsis

The adsorption kinetics of poly(vinylpyrrolidone) (PVP) and sodium dodecyl sulfate (SDS) on alumina particles at pH 3.5 has been studied by measuring the amount of PVP and SDS adsorbed and the dispersion stability of solid suspensions with time. Although PVP alone hardly adsorbs on alumina particles, the adsorption of PVP is enhanced by coadsorption of SDS. In the simultaneous adsorption of PVP-SDS at two initial concentrations of SDS which correspond to the formation of a monolayer and a bilayer of SDS, respectively, the adsorption behavior of PVP with time is significantly affected by the initial SDS concentration. In addition, the dispersion stability of alumina suspensions also changes due to the adsorption of SDS-PVP with time. The mechanism of adsorption kinetics of PVP and SDS on alumina particles is discussed. Copyright 2000 Academic Press.

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