Bijels: a new class of soft materials

Cates, Michael E.; Clegg, Paul S.

doi:10.1039/b807312k

Cited by 222 publications

(236 citation statements)

References 30 publications

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“…Similar situations also occur in coalescence-controlled particle stabilised emulsions 60 and during the arrest of phase separation of immiscible fluids by particles in the so called "Bijels" systems. 61 In these cases also, it is the stabilised interfacial area dictated by the number of available particles, which ultimately determines the final structural length scales once the system is fully evolved.…”

Section: Monodisperse Bubble Size Distributionmentioning

confidence: 99%

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

Ettelaie

Murray

2014

The Journal of Chemical Physics

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The degree of shrinkage of particle stabilised bubbles of various sizes, in a polydisperse bubble dispersion, has been investigated in the light of the finite adsorption times for the particles and the disproportionation kinetics of the bubbles. For the case where the system contains an abundance of particles we find a threshold radius, above which bubbles are stabilised without any significant reduction in their size. Bubbles with an initial radius below this threshold on the other hand, undergo a large degree of shrinkage prior to stabilisation.As the ratio of the available particles to the bubbles is reduced, it is shown that the final bubble size, for the larger bubbles in the distribution, becomes increasingly governed by the number of particles, rather than their adsorption time per se. For systems with "adsorption controlled" shrinkage ratio, the final bubble distribution is found to be wider than the initial one, while for a "particle number controlled" case it is actually narrower. Starting from an unimodal bubble size distribution, we predict that at intermediate times, prior to the full stabilisation of all bubbles, the distribution breaks up into a bimodal one. However, the effect is transient and an unimodal final bubble size distribution is recovered once again, when all the bubbles are stabilised by the particles.-3-1

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Section: Monodisperse Bubble Size Distributionmentioning

confidence: 99%

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

Ettelaie

Murray

2014

The Journal of Chemical Physics

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“…Such characteristics are uniquely met in a new class of so materials known as bicontinuous interfacially jammed emulsion gels (bijels). 15 Bijels are formed through arrested spinodal decomposition of a binary liquid mixture by neutrally wetting colloidal particles. 16 During phase separation, the particles sequester to the uid-uid interface and become jammed once the interfacial area is sufficiently reduced to just accommodate them.…”

Section: Introductionmentioning

confidence: 99%

Microstructural tunability of co-continuous bijel-derived electrodes to provide high energy and power densities

2016

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“…In a similar manner, particles accumulating at the interfaces between two phases, formed during the demixing of two fluids through spinodal decomposition, can arrest the phase separation at some intermediate stage during the process. This gives rise to the so called bicontinuous interfacially jammed emulsion gel (bijel) systems [11][12][13][14] , first predicted theoretically by Cates and co-workers 15 .…”

Section: Introductionmentioning

confidence: 87%

Detachment force of particles from fluid droplets

Ettelaie

Lishchuk

2015

Soft Matter

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We calculate the deformation of a spherical droplet, resulting from the application of a pair of opposite forces to particles located diametrically opposite at the two ends of the droplet. The free-energy analysis is used to calculate the force-distance curves for the generated restoring forces, arising from the displacement of the particles relative to each other. While the logarithmic dependence of the "de Gennes-Hooke" constant on the particle to droplet size ratio, ν, is rather well known in the limit of very small ν, we find that for more realistic particle to droplet size ratios, i.e. ν = 0.001 to 0.01, the additional constant terms of O(1) constitute a significant correction to previously reported results. We derive the restoring force constant to be 2πγ [0.5 − ln(ν/2)] −1 , in perfect agreement with the exact semi-numerical analysis of the same problem. The deviation from the linear force-displacement behaviour, occurring close to the point of detachment, is also investigated. A study of the energy dissipated shows it to be an increasingly dominant component of the work done during the detachment of the particles, as ν decreases. This indicates the existence of a significantly higher energy barrier to desorption of very small particles, compared to the one suggested by their adsorption energy alone.

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Bijels: a new class of soft materials

Cited by 222 publications

References 30 publications

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

Effect of particle adsorption rates on the disproportionation process in pickering stabilised bubbles

Microstructural tunability of co-continuous bijel-derived electrodes to provide high energy and power densities

Detachment force of particles from fluid droplets

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