01549nab a2200205 4500 20260520002824.0 260224s2009 xxu Enhancement of aqueous emulsion and foam stability with oppositely charged surfactant/polyelectrolyte mixed systems sep./oct. 2009 17/06/2010 ; 17/06/2010 10 p. ; 597-606 Transcripción del resumen del autor. We have studied emulsifying and foaming properties of oppositely charged surfactant/polyelectrolyte mixed systems. We have shown that adding a small amount of oppositely charged polyelectrolyte to a ionic surfactant enhances the stability of emulsion and foams at very low surfactant concentration, typically below the CMC, in a range of concentration where the surfactant alone is usually not efficient for stabilizing macroscopic dispersed systems. This effect is explained by the co-adsorption of polymer and surfactant molecules at the fluid/fluid interface and formation of a highly surface active surfactant-polymer complex. Complexation and therefore emulsion and foam stability can be tuned by adjusting electrostatic attraction between the two charged species. Use of amphoteric polyampholyte can be used as pH switchable system for controling emulsion or foam stability. 5 Oil and Gas Science and Technology 64 ARTICULO Argillier, J.F. 16524 Zeilinger, S. 42995 Roche, P. 42996 171198 171198 0 0 0 0 239017 BAAB BAAB 2026-03-05 200046056 0 200046056 2026-03-05 15:13:34 2026-03-05 ARTICULO