Abstract
The adsorption of polyvinyl alcohol (PVA) from solutions of various ionic composition has been studied on alumina. In the presence of sodium dedecylsulphate (SDS) the complexes PVA-SDS are probably formed at the interface oxide-solution. The interacaction between PVA and SDS at the interface leads to increase of PVA adsorption. However the presence of such complexes in the solution causes stepwise decrease of polyvinyl alcohol adsorption. The observed changes of surface charge density of alumina are in accord with the adsorption data. The estimated free energy of PVA adsorption on the surface of alumina is less than −9.7kJ/mole.
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