6533b7dcfe1ef96bd1273214

RESEARCH PRODUCT

Refractive index of water-AOT-n-heptane microemulsions

G. VassalloV. Turco LiveriM. Goffredi

subject

HeptaneChromatographyChemistryBiophysicsAnalytical chemistryPercolation thresholdBiochemistryMicellechemistry.chemical_compoundPercolationPhase (matter)Volume fractionMicroemulsionPhysical and Theoretical ChemistryMolecular BiologyRefractive index

description

Refractive index measurements on water/AOT/n-heptane microemulsions as a function of the volume fraction ϕ of the dispersed phase (water plus AOT) and of the water/AOT molar ratio R have been performed at 25°C. The refractive index was found to vary monotonically with ϕ without any change in rate during the crossover of the percolation threshold. Such a behavior suggested that, well above the percolation threshold, the water-AOT-n-heptane microemulsions are still formed by water-containing AOT reversed micelles dispersed in the oil phase. The analysis of the experimental data allowed an evaluation the fraction of the water molecules bonded to the AOT head group as a function of R.

yearjournalcountryeditionlanguage
1993-10-01Journal of Solution Chemistry
https://doi.org/10.1007/bf00646605