A study of the emulsified microemulsion by SAXS, Cryo-TEM, SD-NMR, and electrical conductivity

Rachel Lutz, Abraham Aserin, Ellen J. Wachtel, Einav Ben-Shoshan, Dganit Danino, Nissim Garti*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A water-in-oil microemulsion was further dispersed in an aqueous phase containing Pluronic F127 as a steric stabilizer, to form a specific type of double emulsion termed emulsified microemulsion (EME). The inner microemulsion phase was made from glycerol-monooleate (GMO), R(+)-limonene, ethanol and glycerol. SAXS (small x-ray scattering), PGSE-NMR (pulse gradient spin echo-NMR), electrical conductivity, and cryo-TEM (cryogenic-transmission electron microscopy) imaging techniques were used to confirm the existence of inner W/O nano-droplets after second emulsification step and upon EME aging. Spherical globules of EME without long-range internal order were observed by the SAXS measurements and the cryo-TEM images. The average globule size of about 200-300 nm remained intact for at least 6 months.

Original languageEnglish
Pages (from-to)1149-1157
Number of pages9
JournalJournal of Dispersion Science and Technology
Volume28
Issue number8
DOIs
StatePublished - Nov 2007
Externally publishedYes

Keywords

  • Cryo-TEM
  • Electrical conductivity
  • Emulsified microemulsion
  • Glycerol monooleate
  • L-phase
  • Microemulsion
  • SAXS
  • SD-NMR

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