Rheology of particulate rafts,films, and foams |
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| Institution: | 1. Université Paris-Est, Laboratoire Navier, UMR 8205 CNRS, ENPC ParisTech, IFSTTAR, 2 allée Kepler, 77 420 Champs-Sur-Marne, France;2. Université Paris-Est, Laboratoire Navier, UMR 8205 CNRS, ENPC ParisTech, IFSTTAR, 5 boulevard Descartes, 77 454 Champs-Sur-Marne, France;1. Laboratoire de Physique des Solides, Université Paris-Sud, UMR CNRS 8502, Bâtiment 510, 91405 Orsay Cedex, France;2. Saint-Gobain Recherche, Saint-Gobain Recherche, 39 quai Lucien Lefranc, 93303 Aubervilliers Cedex, France;1. Fachbereich Physik, Universität Konstanz, Universitätsstrasse 10, 78457 Konstanz, Germany;2. Physik-Institut, Universität Zürich, Winterthurerstrasse 190, 8057 Zürich, Switzerland;1. Yury Gagarin State Technical University of Saratov, 77 Polytekhnicheskaya st., 410054, Saratov, Russian Federation;2. Precision Mechanics and Control Institute of Russian Academy of Sciences, 24 Rabochaya st., 410024, Saratov, Russian Federation;1. School of Chemical and Process Engineering, University of Leeds, Leeds, UK;2. Procter & Gamble Ltd., Whitley Road, Newcastle, Tyne and Wear, UK |
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| Abstract: | Liquid foam exhibits remarkable rheological behavior although it is made with simple fluids: it behaves similar to a solid at low shear stress but flows similar to a liquid above a critical shear stress. Such properties, which have been proved to be useful for many applications, are even enhanced by adding solid particles. Depending on their hydrophobicity and size, the particles can have different geometrical configurations at the mesoscopic scale, that is, at the air–liquid interfaces, in the films, or in the interstices between the bubbles. In this review, we present rheological studies performed on granular rafts and films, on spherical armored interfaces, on gas marbles, and on aqueous foams laden with hydrophilic grains. |
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| Keywords: | Pickering Hydrophobic particles Complex interfaces Elastic modulus Yield stress Viscosity Pressure collapse |
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