Kinetics of Simultaneous Adsorption of Poly(vinylpyrrolidone) and Sodium Dodecyl Sulfate on Alumina Particles.
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.
Esumi
K
Department of Applied Chemistry and Institute of Colloid and Interface Science, Science University of Tokyo, Kagurazaka, Shinjuku-ku, Tokyo, 162-8601, Japan
Iitaka
M
Torigoe
K