Analysis of dynamic surface tension of tetraethyleneglycol monooctyl ether at air/water interface

Saeid Azizian, Hitomi Motani, Kinue Shibata, Takashi Matsuda, Takanori Takiue, Hiroki Matsubara, Makoto Aratono

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The dynamic surface tension of the aqueous solutions of tetraethyleneglycol monooctyl ether (C8E4), a nonionic surfactant, was measured at different concentrations and temperatures. Present data at 298.15 K clearly indicate that the mechanism of adsorption is purely diffusion controlled at low concentrations (0.1∼0.4 mmol/kg), and there is a switchover in adsorption mechanism to the mixed diffusion-kinetic control at higher concentrations. The calculated activation energies increase with concentration, and thus, with surface density, but decrease with temperature. The magnitude of activation energy and its increase with surface density suggest that the barrier is due to the free surface site formation by overcoming mainly the attractive van der Waals forces between the chain of adsorbed C8E4 molecules.

Original languageEnglish
Pages (from-to)1699-1705
Number of pages7
JournalColloid and Polymer Science
Volume285
Issue number15
DOIs
Publication statusPublished - Dec 1 2007

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Colloid and Surface Chemistry
  • Materials Chemistry

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