Central European Journal of Chemistry

, Volume 10, Issue 4, pp 1236–1244

Temperature effects on the adsorption of polyvinyl alcohol on silica

Authors

    • Department of Radiochemistry and Colloids Chemistry, Faculty of ChemistryMaria Curie Sklodowska University
Research Article

DOI: 10.2478/s11532-012-0044-z

Cite this article as:
Wiśniewska, M. cent.eur.j.chem. (2012) 10: 1236. doi:10.2478/s11532-012-0044-z
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Abstract

The influence of temperature on the adsorption of polyvinyl alcohol (PVA) on a silica surface was studied from 15–35°C. The structure of the polymer adsorption layer was determined from spectrophotometric, viscosity and thermogravimetric measurements. The amount of PVA adsorbed, macromolecules’ conformation in solution, thickness of the polymer adsorption layer, and changes in the heating curve of SiO2 with adsorbed polymer were determined. Temperature influences the PVA chain conformation in solution and the structure of the polymer adsorption layer. A temperature rise causes relaxation of polymer coils which results in an increase in the linear dimensions of PVA chains in the solution, the creation of a thicker adsorption layer, and an increase in polymer adsorbed. Polymer adsorption on the silica surface also causes changes in the heating curve of these systems. The mass losses due to heating are smallest for the systems obtained at 15°C because the least polymer is adsorbed at this temperature.
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Keywords

Polyvinyl alcoholSilicaPolymer adsorption layer structureThermogravimetryTemperature influence

Copyright information

© Versita Warsaw and Springer-Verlag Wien 2012