A model of dynamic scattering by microemulsions

Eric W. Kaler, Stephen Prager

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

A model previously developed for the statistical thermodynamics of microemulsion phase equilibria is used to treat the static and dynamic scattering by such systems. The random internal oil/water geometry is represented as resulting from a Voronoi tessellation, and temporal fluctuations are introduced by allowing the generating Poisson nuclei to perform independent Brownian motions. This dynamic model maintains the stationary statistics required of an equilibrium system and also allows representation of a continuous set of structures from oil-in-water to water-in-oil geometries including the bicontinuous geometries expected when oil and water are present in comparable amounts. Comparison of calculated scattering functions with experiment shows quantitative agreement with Rayleigh scattering data and at least qualitative agreement with measured space-time autocorrelation functions. Calculations of a k-dependent diffusion coefficient also are compared with experimental results.

Original languageEnglish (US)
Pages (from-to)359-369
Number of pages11
JournalJournal of Colloid And Interface Science
Volume86
Issue number2
DOIs
StatePublished - Apr 1982

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