Additional attraction between surfactant-coated surfaces

Rafael Tadmor, Jacob Klein

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A simple model that shows an additional attraction between solvated surfactant-coated systems is developed. The model simply calculates the van der Waals attraction between the solvated surfactant layers. This attraction was previously neglected as it was expected to have a small energetic contribution. This is indeed the case; however, despite the small energetic contribution the force is large. In other words, although the expression that we get is small in energy, it is large in force. This is particularly important for surface force balance measurements, where using the developed expression, some apparent discrepancies between measured and theoretical values may now have a possible explanation, and especially those associated with surfactant-coated surfaces. We apply the new expression to a given system, and compare with the experimental results.

Original languageEnglish
Pages (from-to)321-326
Number of pages6
JournalJournal of Colloid and Interface Science
Volume247
Issue number2
DOIs
StatePublished - 1 Jan 2002
Externally publishedYes

Keywords

  • Colloids
  • Functional group
  • Hamaker constant
  • Refractive index
  • Surface force apparatus (SFA)
  • Suspensions
  • Thin layer
  • vdW forces

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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