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Issue 32, 2013
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Squeezing particle-stabilized emulsions into biliquid foams – equation of state

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Abstract

Using a centrifuge, we measure the (pressure vs. density) equation of state of Pickering emulsions stabilized by hard-sphere colloids, in order to elucidate the particle contribution to their mechanical properties. Moreover, we have developed a transparent Pickering emulsion, allowing us to determine local volume fraction as a function of distance within the sediment using confocal microscopy, thus extracting an entire equation of state from one centrifugation cycle. We can explain and predict trends in our data using a quantitative model incorporating interdroplet films with a thickness on the scale of the (micron-sized) particles and repulsive interactions across these films. We suggest that the effective repulsion between droplets is due to the deformation of the liquid–liquid interface between particles on one droplet due to compression against a neighbouring droplet.

Graphical abstract: Squeezing particle-stabilized emulsions into biliquid foams – equation of state

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Article information


Submitted
16 Apr 2013
Accepted
27 Jun 2013
First published
27 Jun 2013

Soft Matter, 2013,9, 7757-7765
Article type
Paper

Squeezing particle-stabilized emulsions into biliquid foams – equation of state

L. Maurice, R. A. Maguire, A. B. Schofield, M. E. Cates, P. S. Clegg and J. H. J. Thijssen, Soft Matter, 2013, 9, 7757
DOI: 10.1039/C3SM51046H

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