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

Kinsi Motomura, Naoko Ando, Hitoshi Matsuki, Makoto Aratono

研究成果: Contribution to journalArticle査読

84 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)188-197
ページ数10
ジャーナルJournal of Colloid And Interface Science
139
1
DOI
出版ステータス出版済み - 10 1 1990

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 生体材料
  • 表面、皮膜および薄膜
  • コロイド化学および表面化学

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