Structure of microemulsions with gemini surfactant studied by solvatochromic probe and diffusion NMR

M. Ben Moshe, S. Magdassi*, Y. Cohen, L. Avram

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The structure of microemulsions prepared by the anionic gemini surfactant didodecyl diphenyl ether disulfonate (C12-DADS) was investigated by a solvatochromic probe and nuclear magnetic resonance (NMR) diffusion measurements. The NMR measurements indicate the presence of bicontinuous and oil-in-water microemulsions depending on microemulsion composition. The absorbance spectra of the solvatochromic probe, Nile red, indicate the solubilization of the probe in different sites, in agreement with the NMR findings. It was also found that the microemulsions were capable of dissolving the hydrophobic probe, Nile red, up to four times better than expected if it were simply dissolved in the toluene phase.

Original languageEnglish
Pages (from-to)221-226
Number of pages6
JournalJournal of Colloid and Interface Science
Volume276
Issue number1
DOIs
StatePublished - 1 Aug 2004

Keywords

  • Diffusion coefficient
  • Gemini surfactant
  • Microemulsion
  • NMR
  • Solvatochromic effect

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