Edinburgh Research Explorer

Particle-size effects in the formation of bicontinuous Pickering emulsions

Research output: Contribution to journalArticle

Related Edinburgh Organisations

Open Access permissions



Original languageEnglish
Article number032308
Number of pages9
JournalPhysical Review E - Statistical, Nonlinear and Soft Matter Physics
Publication statusPublished - 23 Sep 2015


We demonstrate that the formation of bicontinuous emulsions stabilized by interfacial particles (bijels) is more robust when nanoparticles rather than microparticles are used. Emulsification via spinodal demixing in the presence of nearly neutrally wetting particles is induced by rapid heating. Using confocal microscopy, we show that nanospheres allow successful bijel formation at heating rates two orders of magnitude slower than is possible with microspheres. In order to explain our results, we introduce the concept of mechanical leeway, i.e., nanoparticles benefit from a smaller driving force towards disruptive curvature. Finally, we suggest that leeway mechanisms may benefit any formulation in which challenges arise due to tight restrictions on a pivotal parameter, but where the restrictions can be relaxed by rationally changing the value of a more accessible parameter.

    Research areas

  • self-assembly, colloid, phase separation, wetting, liquid-solid interface

Download statistics

No data available

ID: 21687226