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Molecular calculations for interacting surfactant monolayers

  • J. C. Eriksson
  • S. Ljunggren
Amphiphile Solutions
Part of the Progress in Colloid & Polymer Science book series (PROGCOLLOID, volume 76)

Abstract

An outline of a new, rather general molecular calculation scheme for interacting, ionic surfactant/long-chain alcohol monolayers is presented. These surfactant layers are physically adsorbed either at a surfactant solution/air interface or at a surfactant solution/(solid) hydrophobic substrate interface, or, are present in a lamellar liquid crystal. They may be molecularly dispersed or of the condensed, liquid-expanded type.

The most important free energy contributions included are caused by: (i) the hydrophobic effect associated with the hydrocarbon chains, (ii) the electrostatic interactions, (iii) the constraints imposed on the hydrocarbon chain conformations, (iv) the interfacial contacts, (v) the mixing of surfactant and alcohol in the monolayers, (vi) the hydrophobic attraction between hydrocarbon-covered surfaces, (vii) the van der Waals attraction.

Good agreement in demonstrated with surface tension and surface force measurements.

Key words

Ionic surfactant long-chain alcohol monolayers hydrocarbon chain electrostatic interactions van der Waals attraction 

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Copyright information

© Dr. Dietrich Steinkopff Verlag GmbH & Co. KG 1988

Authors and Affiliations

  • J. C. Eriksson
    • 1
  • S. Ljunggren
    • 1
  1. 1.Department of Physical ChemistryThe Royal Institute of TechnologyStockholmSweden

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