Effect of alkane chain length and counterion on the freezing transition of cationic surfactant adsorbed film at alkane mixture - water interfaces

Yuhei Tokiwa, Hiroyasu Sakamoto, Takanori Takiue, Makoto Aratono, Hiroki Matsubara

研究成果: Contribution to journalArticle査読

19 被引用数 (Scopus)

抄録

Penetration of alkane molecules into the adsorbed film gives rise to a surface freezing transition of cationic surfactant at the alkane-water interface. To examine the effect of the alkane chain length and counterion on the surface freezing, we employed interfacial tensiometry and ellipsometry to study the interface of cetyltrimethylammonium bromide and cetyltrimethylammonium chloride aqueous solutions against dodecane, tetradecane, hexadecane, and their mixtures. Applying theoretical equations to the experimental results obtained, we found that the alkane molecules that have the same chain length as the surfactant adsorb preferentially into the surface freezing film. Furthermore, we demonstrated that the freezing transition temperature of cationic surfactant adsorbed film was independent of the kind of counterion.

本文言語英語
ページ(範囲)6235-6241
ページ数7
ジャーナルJournal of Physical Chemistry B
119
20
DOI
出版ステータス出版済み - 5 21 2015

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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