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Langmuir. 2004 May 11;20(10):3933-9. doi: 10.1021/la036410t.

Mixed micelles of fluorocarbon and hydrocarbon surfactants. A small angle neutron scattering study.

Langmuir : the ACS journal of surfaces and colloids

M Kadi, P Hansson, M Almgren, M Bergström, Vasil M Garamus

Affiliations

  1. Department of Physical Chemistry, Uppsala Biomedical Centre, P.O. Box 579, SE-751 23 Uppsala, Sweden.

PMID: 15969382 DOI: 10.1021/la036410t

Abstract

Mixtures of the partly fluorinated cationic surfactant HFDePC (N-(1, 1,2,2-tetrahydroperfluorodecanyl)-pyridinium chloride and deuterated headgroup) with C16TAC, hexadecyl-trimethylammonium chloride, have been investigated using small angle neutron scattering with contrast matching. Earlier results from this system suggested that a demixing occurred, into two coexisting populations of micelles, hydrocarbon-rich and fluorocarbon-rich, respectively. The present results could be explained by one type of mixed micelles with an inhomogeneous distribution of fluorinated and hydrogenated surfactants within the micelles although a demixing cannot be definitely excluded.

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