Anionic surfactant induced desorption of a cationic surfactant from mica

Finian J. Allen, Chris L. Truscott, Rebecca J.L. Welbourn, Stuart M. Clarke

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

The adsorption and desorption of a cationic surfactant, didodecyldimethylammonium bromide, from water onto a mica surface have been investigated using neutron reflectivity. The surfactant was observed to adsorb strongly as a bilayer that was tenacious to a sustained water wash, but on the addition of an anionic surfactant, sodium dodecyl sulfate, at its critical micelle concentration complete desorption was observed.

Original languageEnglish
Pages (from-to)276-281
Number of pages6
JournalApplied Clay Science
Volume160
DOIs
StatePublished - Aug 2018
Externally publishedYes

Funding

We thank BP PLC for funding ( RG8620 ), and specifically Stephanie Houston and Isabella Stocker for their input. We also thank ISIS (RB 1710119, DOI:10.5286/ISIS.E.86389514) and the beamtime committee for the allocation of beamtime, as well as the beamline scientists for their invaluable support.

Keywords

  • Catanionic
  • Didodecyldimethylammonium bromide
  • Mica
  • Neutron reflectivity
  • Sodium dodecyl sulfate
  • Surfactant

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