Negative azeotropy in mixed adsorption of hexanol and dodecylammonium chloride at water/air interface

Hidemi Iyota, Takako Tomimitsu, Ryuzoh Sugii, Kinsi Motomura, Makoto Aratono

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Miscibility of hexanol and dodecylammonium chloride (DAC) in adsorbed films and micelles was investigated by evaluating the compositions of the adsorbed films and micelles from surface tension measurements. Judging from the phase diagram of adsorption, negative azeotropy of adsorption was observed for the mixed adsorption of hexanol and DAC at water/air interfaces. The nonideal mixing in the adsorbed film was clarified using excess functions of adsorption. Interaction between hexanol and DAC in the adsorbed film was compared with that between other alkanols and surfactants. It was found that the range of azeotropes is narrower for the hexanol-DAC mixture than for the heptanol-octylsulfinylethanol mixture, because interaction between different species in an adsorbed film is weaker in the former than in the latter.

Original languageEnglish
Pages (from-to)73-79
Number of pages7
JournalJournal of Colloid And Interface Science
Volume273
Issue number1
DOIs
Publication statusPublished - May 1 2004

All Science Journal Classification (ASJC) codes

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

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