Effective interface Hamiltonians for unbinding transitions in ternary amphiphilic mixtures

F. Clarysse, C. J. Boulter

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1 Citation (Scopus)


We outline an analytic method for deriving effective interfacial models, suitable for describing unbinding behaviour in ternary amphiphilic mixtures, from underlying non-critical bulk models. Herein we concentrate on deriving interfacial properties (the surface tension and rigidity coefficients) for the simple case of a free oil-phase/microemulsion interface. This calculation allows us to explicitly demonstrate the difference between the interfacial tension, which is a uniquely defined quantity, and the rigidities which are highly sensitive to the choice of interface location definition.We conclude by describing how the model derivation may be extended to include the effect of an external surface, which is appropriate for the study of wetting in a confined ternary mixture. We briefly summarize the results of a recent study of wetting at such a surface for which a rich phase diagram is predicted. Copyright © 2001 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)111-119
Number of pages9
JournalFluid Phase Equilibria
Issue number1-2
Publication statusPublished - 30 Jul 2001


  • Interfacial tension
  • Method of calculation
  • Ternary mixtures
  • Wetting transitions


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