FTIR analysis of water in supercritical carbon dioxide microemulsions using monofunctional perfluoropolyether surfactants

F. Loeker, Patricia Marr, S.M. Howdle

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)

Abstract

We describe perfluoropolyether (PFPE) surfactants which are capable of stabilising the water/CO2 interface and present FTIR spectroscopic evidence for the formation of water in supercritical carbon dioxide microemulsions. A wide variety of single chain surfactants of differing chain lengths but similar structure has been screened and the effect of the surfactant chain length on the water uptake was studied. The ammonium carboxylate of the PFPE surfactant Krytox FSL(TM) with an average molecular weight of 2500 g mol(-1) was demonstrated to be the surfactant capable of dissolving the most water out of all the tested surfactants and hence to have the optimum chain length. (C) 2002 Elsevier Science B.V. All rights reserved.
Original languageEnglish
Pages (from-to)143-150
Number of pages8
JournalColloids and Surfaces a-Physicochemical and Engineering Aspects
Volume214
Issue number1-3
Publication statusPublished - 12 Mar 2003

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

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