Thermodynamic studies on adsorption at interfaces. VII. Adsorption and micelle formation of binary surfactant mixtures

Kinsi Motomura, Naoko Ando, Hitoshi Matsuki, Makoto Aratono

Research output: Contribution to journalArticle

80 Citations (Scopus)

Abstract

By extending the thermodynamic method developed in this series, a thermodynamic formulation has been proposed to account for the behavior of the adsorbed films of binary surfactant mixtures at interfaces. Further, this formulation has been extended so as to be applicable to the mixed adsorbed films in equilibrium with mixed micelles. The surface tension of the aqueous solution of a decylammonium bromide (DeAB)-dodecylammonium chloride (DAC) mixture has been measured as a function of the total molality of DeAB and DAC and the mole fraction of DAC in the total surfactant at 298.15 K under atmospheric pressure. The total surface density and the compositions in the adsorbed film and micelle have been evaluated by applying the thermodynamic equations derived to the experimental results. It has been concluded on the basis of the surface tension-composition and critical micelle concentration (CMC)-composition diagrams that DeAB and DAC mix slightly nonideally with each other in both the adsorbed film and the micelle.

Original languageEnglish
Pages (from-to)188-197
Number of pages10
JournalJournal of Colloid And Interface Science
Volume139
Issue number1
DOIs
Publication statusPublished - Oct 1 1990

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Thermodynamic studies on adsorption at interfaces. VII. Adsorption and micelle formation of binary surfactant mixtures'. Together they form a unique fingerprint.

  • Cite this