Surface adsorption and aggregate formation of cationic gemini surfactant and long-chain alcohol mixtures

H. Matsubara, T. Eguchi, H. Takumi, K. Tsuchiya, T. Takiue, M. Aratono

研究成果: ジャーナルへの寄稿学術誌査読

11 被引用数 (Scopus)

抄録

We measured the surface tension of aqueous solutions of octanol-butandiyl-l,4-bis(decyldimethylammonium bromide) using the drop-volume technique at 298.15 K under atmospheric pressure as a function of the total molality and bulk composition. The results of the surface tension measurements, which were analyzed by originally developed thermodynamic equations, suggested that octanol molecules filled the spaces among the hydrophobic chains of gemini surfactants and formed a densely packed monolayer with them in the adsorbed film. The turbidity of aqueous solutions was also measured to construct the concentration-composition diagram with the surface tension data. A transmission electron microscope was used to determine the aggregate morphology in the aqueous solutions. Disc-like micelle and microemulsion regions were found on the diagram prior to the spherical micelle formation; nevertheless, the butandiy1-1,4-bis(decyldimethylammonium bromide) itself formed only spherical (or small ellipsoid) micelles in the concentration range measured. We also studied the relationship between synergism and molecular packing in the aggregates.

本文言語英語
ページ(範囲)8847-8853
ページ数7
ジャーナルJournal of Physical Chemistry B
113
26
DOI
出版ステータス出版済み - 7月 2 2009

!!!All Science Journal Classification (ASJC) codes

  • 物理化学および理論化学
  • 表面、皮膜および薄膜
  • 材料化学

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