Temperature effects on the adsorption of polyvinyl alcohol on silica

• Authors: Małgorzata Wiśniewska
• Languages of publication: EN

Abstracts

EN

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. [...]

Keywords

EN

Polyvinyl alcohol; Silica; Polymer adsorption layer structure; Thermogravimetry; Temperature influence

• Publisher: De Gruyter Open
• Journal: Open Chemistry
• Year: 2012
• Volume: 10
• Issue: 4
• Pages: 1236-1244

Dates

published

1 - 8 - 2012

online

29 - 5 - 2012

Contributors

author

Małgorzata Wiśniewska

• Department of Radiochemistry and Colloids Chemistry, Faculty of Chemistry, Maria Curie Sklodowska University, 20-031, Lublin, Poland

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Identifiers

DOI

10.2478/s11532-012-0044-z