The roles of particles in multiphase processes: Particles on bubble surfaces

Advances in Colloid and Interface Science
G BournivalErica J Wanless

Abstract

Particle-stabilised foams (or froths) form the fundamental framework of industrial processes like froth flotation. This review provides an overview of the effects of particles on bubble surfaces. The characteristics of the particles have a profound effect on the stability of the bubbles although the stabilisation mechanisms may differ. It is well known that layers of particles may provide a steric barrier between two interfaces, which prevents the coalescence of bubbles. Although perhaps considered of lesser importance, it is interesting to note that particles may affect the bubble surface and momentarily suppress coalescence despite being absent from the film separating two bubbles. Foams are at best metastable and coalescence occurs to achieve a state of minimum energy. Despite this, particles have been reported to stabilise bubbles for significant periods of time. Bubble coalescence is accompanied by a release of energy triggered by the sudden change in surface area. This produces a distinctive oscillation of the bubble surface, which may be influenced by the presence of incompressible particles yielding unique surface properties. A survey of the literature shows that the properties of these composite materials are greatly a...Continue Reading

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Citations

Jan 1, 2016·Advances in Colloid and Interface Science·Jianlong WangSaeed Farrokhpay
May 26, 2016·Langmuir : the ACS Journal of Surfaces and Colloids·Ghislain BournivalErica J Wanless
Feb 16, 2016·Soft Matter·J Wang, A V Nguyen
Oct 1, 2020·Reports on Progress in Physics·Xiaoliang JiDuyang Zang
Dec 29, 2020·Journal of Colloid and Interface Science·H Wang, P R Brito-Parada
Mar 23, 2021·Langmuir : the ACS Journal of Surfaces and Colloids·Xiangyang LingSeher Ata
Feb 21, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Peipei WangPablo R Brito-Parada

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