Variation with amphiphilic strength of the properties of ternary mixtures

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Abstract
Properties of a ternary system with fixed oil and water components, but an amphiphile of varying strength, are calculated by means of a lattice model and the Landau-Ginzburg free energy it generates. Using the lattice model, we calculate the variation of the amphiphile concentration at the base and apex of the three-phase triangle from the tricritical to the four-phase point, as well as the oil-water interfacial tension and interfacial profiles. These profiles are combined with the Landau-Ginzburg free energy to determine, for the same range of amphiphiles, the bending moduli that describe the nature of the surfactant sheet separating oil and water within the microemulsion.