The adsorption at the interface between an aqueous solution of several surface-active agents and another fluid (air or oil) phase is addressed theoretically. We derive the kinetic equations from a variation of the interfacial free energy, solve them numerically, and provide an analytic solution for the simple case of a linear adsorption isotherm. Calculating asymptotic solutions analytically, we find the characteristic time scales of the adsorption process and observe the behavior of the system at various temporal stages. In particular, we relate the kinetic behavior of the mixture to the properties of its individual constituents and find good agreement with experiments. In the case of kinetically limited adsorption, the mixture kinetics is found to be considerably different from that of the single-surfactant solutions because of strong coupling between the species.
Kinetics of Surfactant Adsorption at Fluid−Fluid Interfaces: Surfactant Mixtures
Published 1996 in Langmuir
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- Publication year
1996
- Venue
Langmuir
- Publication date
1996-08-08
- Fields of study
Materials Science, Physics, Chemistry
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Semantic Scholar
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