Preparation of particle-stabilized emulsions using membrane emulsification

Qingchun Yuan, Olivier J. Cayre, Mohamed Manga, Richard A. Williams, Simon Biggs

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

There is currently significant interest in particle-stabilized emulsions for a variety of applications and as precursors to other materials such as microcapsules or colloidosomes. A prerequisite for many applications is the ability to produce stable droplets with a well-controlled size. The preparation of oil-in-water (o/w) emulsions stabilized by silica colloids has been demonstrated here using membrane emulsification techniques. Emulsions were produced using both a cross-flow membrane device and a rotating membrane reactor. Under the correct conditions, highly stable emulsions with very narrow droplet size distributions can be produced. Investigations into the effects of changing the cross-flow shear rate at a fixed droplet production rate illustrate the fine control over mean droplet size that is possible with these emulsification techniques. Evidence for the importance of particle adsorption kinetics onto growing droplets prior to detachment from the membrane surface was obtained by varying the droplet production rate under fixed shear conditions. The presence of a critical surface coverage by the stabilizing particles to prevent droplet coalescence was clearly seen. Comparison with samples produced using conventional high-shear homogenization highlights the improved control over size distribution available from these membrane techniques.

Original languageEnglish
Pages (from-to)1580-1588
Number of pages9
JournalSoft Matter
Volume6
Issue number7
DOIs
Publication statusPublished - 7 Apr 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Preparation of particle-stabilized emulsions using membrane emulsification'. Together they form a unique fingerprint.

  • Cite this