Interaction of mono-carboxylic acids in benzene studied by small-angle neutron scattering

Viktor I. Petrenko, Mikhail V. Avdeev, László Almásy, Leonid A. Bulavin, Victor L. Aksenov, László Rosta, Vasil M. Garamus

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

The intermolecular interaction of non-saturated (oleic acid) and saturated (stearic and myristic acids) mono-carboxylic acids in a non-polar organic solvent (deuterated benzene) is derived from the concentration dependence of the small-angle neutron scattering. The excluded volume repulsion dominates over the attraction (supposed due to van der Waals forces) for oleic and myristic acids. In turn, for stearic acid the attractive component is higher than the repulsive one; this results in a shift of the transition into the liquid crystalline state (because of molecule anisotropy) towards smaller concentrations and could explain early data on worse stabilization properties of stearic acid in ferrofluids compared to oleic and myristic acids.

Original languageEnglish
Pages (from-to)91-95
Number of pages5
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume337
Issue number1-3
DOIs
Publication statusPublished - Apr 1 2009

Keywords

  • Ferrofluids stabilization
  • Mono-carboxylic acids
  • Nematic attraction
  • Small-angle neutron scattering

ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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