Miscibility of 2-(Octylsulfinyl)ethanol and Decylammonium Chloride in the Adsorbed Film and Micelle

Koji Abe, Hidetsugu Matsukiyo, Norihiro Ikeda, Makoto Aratono, Kinsi Motomura

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The surface tension of the aqueous solution of 2-(octylsulfinyl)ethanol (OSE) and decylammonium chloride (DeAC) mixture was measured as a function of total molality and composition of surfactants at 298.15 K under atmospheric pressure. The total surface density and compositions in the adsorbed film and micelle of the mixture were evaluated by applying thermodynamic relations to experimental results. It was found that the phase diagrams obtained for the adsorption and micelle formation of the mixture are different in shape from those of 2-(decylsulfinyl)ethanol (DeSE)-OSE and dodecylammonium chloride (DAC)-DeAC mixtures which are assumed to mix ideally in the adsorbed film and micelle. Such a nonideal behavior was attributed to the attractive interaction between OSE and DeAC molecules. Further, the interaction is concluded to be more attractive in the micelle than in the adsorbed film.

Original languageEnglish
Pages (from-to)2882-2886
Number of pages5
JournalBulletin of the Chemical Society of Japan
Issue number10
Publication statusPublished - Oct 1991


All Science Journal Classification (ASJC) codes

  • Chemistry(all)

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