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Ettelaie, R and Murray, BS (2015) Evolution of bubble size distribution in particle stabilised bubble dispersions: Competition between particle adsorption and dissolution kinetics. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 475. 27 - 36. ISSN 0927-7757
Abstract
It is shown that in systems containing bubbles stabilised by nanoparticles, the time scales for the dissolution of small microbubbles can be comparable with those involving the transport and adsorption of the stabilising nanoparticles onto the surface of the bubbles. We have studied the evolution of model bubble size distribution functions in the light of this effect and also the competition between different sized bubbles for the finite number of available particles. It is found that for dispersions moderately rich in nanoparticles, the width of the final distribution function can become broader than the initial one, whereas for cases deficient in particles the reverse is observed. For each given bubble size, there exists a particle to bubble concentration ratio above which the final size of a bubble of this radius is no longer affected by the presence of other bubbles. In a system deficient in particles, this can still hold true for bubbles in the lower end of the size distribution range, but not the ones at the upper end. By considering simple cases consisting of just two bubbles sizes, we show that the degree of shrinkage of the bigger bubbles is significantly increased in the presence of a small amount of gas in the form of smaller bubbles. In contrast, the final bubble size of the smaller bubbles is found to be largely insensitive to the amount of gas included within larger bubbles. The implications of these results for the final fraction of retained gas, in these types of particle stabilised bubble systems, are also discussed.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2014, Elsevier. This is an author produced version of a paper published in Colloids and Surfaces A: Physicochemical and Engineering Aspects. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Bubble size distribution; Disproportionation; Hydrophobin; Microbubbles; Particle stabilised bubbles |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Food Science and Nutrition (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 01 Oct 2015 14:56 |
Last Modified: | 04 Nov 2017 02:41 |
Published Version: | http://dx.doi.org/10.1016/j.colsurfa.2014.10.005 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.colsurfa.2014.10.005 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:87416 |
Available Versions of this Item
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Evolution of bubble size distribution in particle stabilised bubble dispersions: Competition between particle adsorption and dissolution kinetics. (deposited 12 Mar 2015 11:48)
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Evolution of bubble size distribution in particle stabilised bubble dispersions: Competition between particle adsorption and dissolution kinetics. (deposited 01 May 2015 09:22)
- Evolution of bubble size distribution in particle stabilised bubble dispersions: Competition between particle adsorption and dissolution kinetics. (deposited 01 Oct 2015 14:56) [Currently Displayed]
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Evolution of bubble size distribution in particle stabilised bubble dispersions: Competition between particle adsorption and dissolution kinetics. (deposited 01 May 2015 09:22)