Competitive adsorption of surfactants at air/water interfaces

The zeta potential of an air bubble suspended in an aqueous solution of mixed fluorocarbon and hydrocarbon anionic surfactants is studied over a wide range of concentrations and mixture compositions. The zeta potential is related to surfactant ion adsorption. The two surfactants, which exhibit an an...

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Veröffentlicht in:	Journal of colloid and interface science 2003-05, Vol.261 (2), p.233-237
Hauptverfasser:	Graciaa, A, Creux, P, Lachaise, J, Schechter, R.S
Format:	Artikel
Sprache:	eng
Schlagworte:	Air/water interfaces Chemical Physics Chemistry Exact sciences and technology Gas-liquid interface and liquid-liquid interface General and physical chemistry Mixed surfactants Physics Surface physical chemistry Surfactant adsorption Zeta potential
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Beschreibung
Zusammenfassung:	The zeta potential of an air bubble suspended in an aqueous solution of mixed fluorocarbon and hydrocarbon anionic surfactants is studied over a wide range of concentrations and mixture compositions. The zeta potential is related to surfactant ion adsorption. The two surfactants, which exhibit an antipathy manifested by micellar demixing, compete for surface sites. The total surfactant adsorption is reduced when both surfactants are present. Adsorption phenomena are closely correlated to the micellar phase diagram.
ISSN:	0021-9797 1095-7103
DOI:	10.1016/S0021-9797(03)00052-3