A Surface Equation of State for a Partially Soluble Ionized Surfactant

The surface pressure and adsorption isotherm as functions of surfactant and salt concentration are determined for an ionized surfactant. This analysis differs from previous work in that the surfactant, while ionized in the bulk solution, is assumed to be nonionized at the surface. The analysis is ap...

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Veröffentlicht in:	Journal of colloid and interface science 1997-11, Vol.195 (1), p.1-7
Hauptverfasser:	Vaughn, Mark W., Slattery, John C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Chemistry dividing surface Exact sciences and technology Gas-liquid interface and liquid-liquid interface General and physical chemistry interface interfacial tension Surface physical chemistry thermodynamics
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Beschreibung
Zusammenfassung:	The surface pressure and adsorption isotherm as functions of surfactant and salt concentration are determined for an ionized surfactant. This analysis differs from previous work in that the surfactant, while ionized in the bulk solution, is assumed to be nonionized at the surface. The analysis is applied to several soluble surfactants and provides a reasonable fit to experimental surface pressure data. With this analysis, the surface solution is found to be ideal for a number of surfactants, so one less parameter is required than is used by the regular solution theory model of Lucassen-Reynders (1).
ISSN:	0021-9797 1095-7103
DOI:	10.1006/jcis.1997.5129