Colloid and Polymer Science

, Volume 267, Issue 9, pp 825–830 | Cite as

Physicochemical properties of α, ω-type bolaform surfactant in aqueous solution. Eicosane-1,20-bis(triethylammonium bromide)

  • K. Ikeda
  • M. Yasuda
  • M. Ishikawa
  • K. Esumi
  • K. Meguro
  • W. Binana-Limbele
  • R. Zana
Colloid Science
Received:
Accepted:

Abstract

The physicochemical properties of theα, ω- type (bolaform) surfactant, eicosane-1, 20-bis(triethylammonium bromide) (C20Et6), in aqueous solution have been investigated by means of surface tension, electrical conductivity, dye solubilization, and time-resolved fluorescence quenching (determination of average micelle aggregation number). Using electrical conductivity, the critical micelle concentration of C20Et6 was found to be 6.0×10−3 mol dm−3 and the ionization degree of C20Et6 micelle was found to be 0.42. From surface tension measurments, the molecular area of C20Et6 at the air-water interface was about twice that of normal type surfactants such as dodecyltrimethylammonium bromide (DTAB). The solubilizing power of micellar solution of C20Et6 toward Orange OT was 1.0×10−2 mole of dye per mole of surfactant, i. e., slightly smaller than that of DTAB. The micelle aggregation number,N, was found to be 17±2 by time-resolved fluorescence quenching. C20Et6 showed a very small temperature dependence ofN, much less than for normal surfactants.

Key words

α ω-typesurfactant bolaform criticalmicelleconcentration aggregationnumber surfacearea 
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Copyright information

© Steinkopff 1989

Authors and Affiliations

  • K. Ikeda
    • 1
  • M. Yasuda
    • 1
  • M. Ishikawa
    • 1
  • K. Esumi
    • 1
  • K. Meguro
    • 1
  • W. Binana-Limbele
    • 2
  • R. Zana
    • 2
  1. 1.Department of Applied Chemistry, Institute of Colloid and Interface ScienceScience University of TokyoTokyoJapan
  2. 2.Institut C. Sadron (CRM-EAHP)CNRSStrasbourghFrance

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