Phase transition in the adsorbed films at water/air interface

Makoto Aratono, Shozo Uryu, Yoshiteru Hayami, Kinsi Motomura, Ryohei Matuura

研究成果: Contribution to journalArticle査読

110 被引用数 (Scopus)


The surface tension at the aqueous solution/air interface has been measured for eight surface active substances at 298.15°K under atmospheric pressure. It has been found that each surface tension versus concentration curve has a distinct break at a relatively low concentration and a relatively high surface tension. This result implies that the two states of adsorbed monolayer coexist in equilibrium at the break point. The surface excess numbers of moles of surface active substances and the surface pressure versus mean area per adsorbed molecule curves confirmed that the phase transformation takes place between the gaseous and the expanded states. It has also been shown that the hydrocarbon chain length, and the ionic nature and size of polar head group of a surface active substance have a great influence on the properties inherent in the phase transition.

ジャーナルJournal of Colloid And Interface Science
出版ステータス出版済み - 3 1984

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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