Abstract
Adsorption studies of polyvinylpyrrolidone (PVP) on the surface of colloidal silicas, Aerosil 300 and Aerosil R-972 are reported. The adsorption isotherms of PVP at the hydrophilic silica/aqueous solution interface were greater than that at the hydrophobic silica R-972. The PVP adsorption shows that the amount adsorbed decreases with the concentration.
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