INTERACTION OP POLYVINYL ALCOHOL WITH LECITHIN AT THE AIR/WATER AND OIL/WATER INTERFACES AND ITS EFFECT ON EMULSION STABILITY
- 1 January 1982
- journal article
- research article
- Published by Taylor & Francis in Journal of Dispersion Science and Technology
- Vol. 3 (4) , 419-433
- https://doi.org/10.1080/01932698208943650
Abstract
The interaction of polyvinyl alcohol (PVA) with lecithin films at the air/water and xylene/water interfaces was studied at pH 3, the isoelectric point of lecithin. Surface and interfacial tension measurements and electro-phoretie mobility data showed that PVA either replaces the lecithin molecules or becomes coadsorbed with it at the interface. This mixed film has no elasticity and very low interfacial viscosity. However, coalescence rate measurements showed that the emulsion formed by the polymer* lecithin is more stable than that formed with either polymer or lecithin alone. The enhanced stability by the PVA-lecithin mixed film was attributed to steric interaction produced by the adsorbed polymer.Keywords
This publication has 5 references indexed in Scilit:
- Interfacial action of natural surfactants in oil/water systemsJournal of Colloid and Interface Science, 1981
- Adsorption of polyvinyl alcohol on the paraffin—water interface. I. Interfacial tension as a function of time and concentrationJournal of Colloid and Interface Science, 1972
- Factors affecting emulsion stability, and the HLB conceptJournal of Colloid and Interface Science, 1972
- Coalescence of liquid drops at oil-water interfacesJournal of Colloid Science, 1958
- The surface chemistry of proteinsTransactions of the Faraday Society, 1950