Universal law of fractionation for slightly polydisperse systems

R M L Evans, D J Fairhurst, Wilson Poon

Research output: Contribution to journalArticlepeer-review

Abstract

By perturbing about a general monodisperse system, we provide a complete description of two-phase equilibria in any system which is slightly polydisperse in some property (e.g., particle size, charge, etc.). We derive a universal law of fractionation which is corroborated by comprehensive experiments on a model colloid-polymer mixture. We furthermore predict that phase separation is an effective method of reducing polydispersity only for systems with a skewed distribution of the polydisperse property.

Original languageEnglish
Pages (from-to)1326-1329
Number of pages4
JournalPhysical Review Letters
Volume81
Issue number6
DOIs
Publication statusPublished - 10 Aug 1998

Keywords

  • STATISTICAL THERMODYNAMICS
  • PHASE-EQUILIBRIA
  • FLUIDS
  • SPHERES
  • HARD

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