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Abstract / Description of output
Bicontinuous interfacially jammed emulsion gels (bijels) are solid-stabilised emulsions with two interpenetrating continuous phases. Employing the method of centrifugal compression we find that macroscopically the bijel yields at relatively low angular acceleration. Both continuous phases escape from the top of the structure, making any compression immediately irreversible. Microscopically, the bijel becomes anisotropic with the domains aligned perpendicular to the compression direction which inhibits further liquid expulsion; this contrasts strongly with the sedimentation behaviour of colloidal gels. The original structure can, however, be preserved close to the top of the sample and thus the change to an anisotropic structure suggests internal yielding. Any air bubbles trapped in the bijel are found to aid compression by forming channels aligned parallel to the compression direction which provide a route for liquid to escape.
Original language | English |
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Pages (from-to) | 4375-4383 |
Number of pages | 9 |
Journal | Soft Matter |
Volume | 12 |
DOIs | |
Publication status | Published - 5 Apr 2016 |
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Dive into the research topics of 'Compressing a spinodal surface at fixed area: bijels in a centrifuge'. Together they form a unique fingerprint.Activities
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Pint of Science 2017
Job Thijssen (Presenter)
15 May 2017Activity: Participating in or organising an event types › Public Engagement – Public lecture/debate/seminar