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1 2017

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Influence of polyvinylpyrrolidone adsorption on stability of silica aqueous suspension - effects of polymer concentration and solid content

Perez Huertas S., Terpiłowski K., Wiśniewska M., Zarko V.

Physicochemical Problems of Mineral Processing

2017

Vol. 53, iss. 1

121--135

The influence of polyvinylpyrrolidone (PVP) adsorption on the silica suspension stability was studied. The effects of silica content, polymer addition and suspension dilution with water were examined. The turbidimetry method was applied to examine stability of the investigated systems as a function of time. It was shown that the suspension without polymer was characterized by the smallest stability, whereas the systems containing PVP (before and after dilution) are successively stable. The specific conformation of PVP chains on the solid surface is responsible for the stabilization–flocculation properties of PVP in the colloidal suspension.