The journal club is intended to be a weekly natter about interesting recent research. We tend to stick to high-impact journals - Nature, Science, PNAS and PRL have been popular - but this is not prescriptive. Given the diversity of research in the CM group, chosen topics vary widely. Anyone and everyone is welcome: if you have a paper you want to discuss, email it to me (Joe Tavacoli
) and I'll slot you in.
Week beginning 22 November 2015
Monday 23 Nov 15 - 11:30am
To be confirmed
Friday 27 Nov 15 - 11:30am - JCMB 2511
Stabilization of Pickering Emulsions with Oppositely Charged Latex Particles: Influence of Various Parameters and Particle Arrangement around Droplets
Authors: Trivikram Nallamilli, Bernard P. Binks, Ethayaraja Mani, Madivala G. Basavaraj
Speaker: David French
In this study we explore the fundamental aspects of Pickering emulsions stabilized by oppositely charged particles. Using oppositely charged latex particles as a model system, Pickering emulsions with good long-term stability can be obtained without the need for any electrolyte. The effects of parameters like oil to water ratio, mixed particle composition, and pH on emulsion type and stability are explored and linked to the behavior of the aqueous particle dispersion prior to emulsification. The particle composition is found to affect the formation of emulsions, viz., stable emulsions were obtained close to a particle number ratio of 1:1, and no emulsion was formed with either positively or negatively charged particles alone. The emulsions in particle mixtures exhibited phase inversion from oil-in-water to water-in-oil beyond an oil volume fraction of 0.8. Morphological features of emulsion droplets in terms of particle arrangement on the droplets are discussed.
11200-11208 (2105) pdf version
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