Using viscosity, electrical conductivity, light transmittance and electrophoreses methods, the interactions between cationic/anionic polyelectrolytes of different charge density and molecular mass and ionic surfactants in aqueous and electrolyte solutions have been studied. Strong interactions between components are observed due to electrostatic attraction between oppositely charged polymers and surfactants, which are manifested by a substantial reduction of solution viscosity and light transmittance as well as by a relative decease in conductivity of the systems. With increasing the surfactant content, the formed PE-tenside complexes precipitate and then dissolve again. For highly charged polyelectrolytes a wide destabilization zone is observed and at high surfactant concentrations only partial dissolution of insoluble complexes takes place. In this region the ratio between charges of surfactant and polyelectrolyte reaches 3-4. With increasing the C atom numbers in the SAA molecule, the concentration of the surfactant at which reduction in system viscosity and light transmittance occurs diminishes. This is an evidence of the important role of hydrophobic interactions in binding and cooperation between adsorbed surfactant molecules. As a result of operation of these forces also interactions between high molecular anionic polyelectrolytes and anionic surfactants take place.
|Translated title of the contribution||Study of electrolyte - Ionic surfactant interactions|
|Number of pages||6|
|Journal||Magyar Kemiai Folyoirat, Kemiai Kozlemenyek|
|Publication status||Published - May 1 2002|
ASJC Scopus subject areas