Abstract

We report the self-assembly of a single species or a binary mixture of microparticles in ionic liquid-in-water Pickering emulsions, with emphases on the interfacial self-assembled particle structure and the partitioning preference of free particles in the dispersed and continuous phases. The particles form monolayers at ionic liquid-water interfaces and are close-packed on fully covered emulsion droplets or aggregated on partially covered droplets. In contrast to those at oil-water interfaces, no long-range-ordered colloidal lattices are observed. Interestingly, other than equilibrating at the ionic liquid-water interfaces, the microparticles also exhibit a partitioning preference in the dispersed and continuous phases: the sulfate-treated polystyrene (S-PS) and aldehyde-sulfate-treated polystyrene (AS-PS) microparticles are extracted to the ionic liquid phase with a high extraction efficiency, whereas the amine-treated polystyrene (A-PS) microparticles remain in the water phase.

Original languageEnglish (US)
Pages (from-to)508-512
Number of pages5
JournalLangmuir
Volume27
Issue number2
DOIs
StatePublished - Jan 18 2011

Fingerprint

Ionic Liquids
Emulsions
Ionic liquids
Self assembly
emulsions
self assembly
microparticles
Polystyrenes
Water
liquids
polystyrene
water
Sulfates
sulfates
Binary mixtures
Aldehydes
aldehydes
binary mixtures
Amines
Monolayers

ASJC Scopus subject areas

  • Electrochemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Materials Science(all)
  • Spectroscopy

Cite this

Particle self-assembly in ionic liquid-in-water pickering emulsions. / Ma, Huan; Dai, Lenore.

In: Langmuir, Vol. 27, No. 2, 18.01.2011, p. 508-512.

Research output: Contribution to journalArticle

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