Compositional ripening of particle- and surfactant-stabilised emulsions: a comparison
Condensed Matter journal club
Compositional ripening of particle- and surfactant-stabilised emulsions: a comparison
- Event time: 11:30am
- Event date: 11th June 2010
- Speaker: Dr Job Thijssen (School of Physics & Astronomy, University of Edinburgh)
- Location: Room 2511, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Event details
Abstract
When -ionone-in-water emulsions are mixed with squalane-in-water emulsions, the slightly water-soluble, mobile -ionone undergoes mass transfer to the drops of highly water-insoluble, immobile oil squalane. We have investigated this compositional ripening process for emulsions stabilised either by particles or by surfactant molecules. For particle-stabilised emulsions, the swelling of the squalane-containing drops triggers droplet coalescence which causes the final swollen droplet radius to be proportional to the swelling ratio to the power of 1. Surfactant-stabilised emulsions swell without coalescence which causes the final droplet radius to be proportional to the swelling ratio to the power 1/3. Addition of excess, non-adsorbed particles to the particle-stabilised emulsions suppresses the swelling-triggered coalescence and causes a switchover from particle to surfactant behaviour.Phys. Chem. Chem. Phys. 12 2219 (2010)
Authors
B.P. Binks, P.D.I. Fletcher, B.L. Holt, O.Kuca, P. Beaussoubre and K. Wong
About Condensed Matter journal club
Given the diversity of research in the CM group, chosen topics vary widely. We tend to stick to high-impact journals - Nature, Science, PNAS and PRL have been popular - but this is not prescriptive..