The standard gibbs free energy of adsorption and isotherms of adsorption of amphiphilic molecules and clusters at the oil/water and gas/water interfaces: Adsorption of dry and hydrated chlorophyll

V. S. Markin, M. I. Gugeshashvili, A. G. Volkov, G. Munger, R. M. Leblanc

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

The thermodynamics of adsorption of large surface active compounds at the interface between two immiscible liquids is considered. These molecules are supposed to substitute at the interface a number of adsorbed molecules of both solvents. Gibbs free energy and the isotherm of adsorption of surface active amphiphilic compounds were calculated. The adsorption isotherms of dry and wet chlorophyll a at the octane/water and air/water interfaces are measured. The difference between the adsorption behavior of chlorophyll a dissolved in dry and wet octane is discovered. The thermodynamic parameters of chlorophyll monomer and hydrated oligomer of chlorophyll a adsorption at octane/water interface are determined.

Original languageEnglish (US)
Pages (from-to)264-275
Number of pages12
JournalJournal of Colloid And Interface Science
Volume154
Issue number1
DOIs
StatePublished - Nov 1992
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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