A surface equation of state for a partially soluble ionized surfactant

Mark W. Vaughn; John C. Slattery

doi:10.1006/jcis.1997.5129

A surface equation of state for a partially soluble ionized surfactant

Mark W. Vaughn, John C. Slattery

Chemical Engineering

Research output: Contribution to journal › Article › peer-review

10 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1-7
Number of pages	7
Journal	Journal of Colloid And Interface Science
Volume	195
Issue number	1
DOIs	https://doi.org/10.1006/jcis.1997.5129
State	Published - Nov 1 1997

Keywords

Dividing surface
Interface
Interfacial tension
Thermodynamics

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KW - Dividing surface

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KW - Thermodynamics

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