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Keshavarzi B, Krause T, Schwarzenberger K, Eckert K, Ansorge-Schumacher MB, Heitkam S. Wash water addition on protein foam for removal of soluble impurities in foam fractionation process. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2022.130215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lamolinairie J, Dollet B, Bridot JL, Bauduin P, Diat O, Chiappisi L. Probing foams from the nanometer to the millimeter scale by coupling small-angle neutron scattering, imaging, and electrical conductivity measurements. Soft Matter 2022; 18:8733-8747. [PMID: 36341841 DOI: 10.1039/d2sm01252a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Liquid foams are multi-scale structures whose structural characterization requires the combination of very different techniques. This inherently complex task is made more difficult by the fact that foams are also intrinsically unstable systems and that their properties are highly dependent on the production protocol and sample container. To tackle these issues, a new device has been developed that enables the simultaneous time-resolved investigation of foams by small-angle neutron scattering (SANS), electrical conductivity, and bubbles imaging. This device allows the characterization of the foam and its aging from nanometer up to centimeter scale in a single experiment. A specific SANS model was developed to quantitatively adjust the scattering intensity from the dry foam. Structural features such as the liquid fraction, specific surface area of the Plateau borders and inter-bubble films, and thin film thickness were deduced from this analysis, and some of these values were compared with values extracted from the other applied techniques. This approach has been applied to a surfactant-stabilized liquid foam under free drainage and the underlying foam destabilization mechanisms were discussed with unprecedented detail. For example, the information extracted from the image analysis and SANS data allows for the first time to determine the disjoining pressure vs. thickness isotherm in a real, draining foam.
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Affiliation(s)
- Julien Lamolinairie
- Institut Max von Laue - Paul Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France.
| | - Benjamin Dollet
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | | | - Pierre Bauduin
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - Olivier Diat
- ICSM, Univ Montpellier, CEA, CNRS, ENSCM, Marcoule, France
| | - Leonardo Chiappisi
- Institut Max von Laue - Paul Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France.
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Keshavarzi B, Krause T, Sikandar S, Schwarzenberger K, Eckert K, Ansorge-Schumacher MB, Heitkam S. Protein enrichment by foam Fractionation: Experiment and modeling. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117715] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Richesson S, Sahimi M. Flow and Transport Properties of Deforming Porous Media. I. Permeability. Transp Porous Media 2021; 138:577-609. [DOI: 10.1007/s11242-021-01633-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Muin SR, Rabbani A, Bournival G, Ata S, Armstrong RT. Utilization of microcomputed tomography and pore network modeling to characterize foam dynamics. Chem Eng Sci 2021. [DOI: 10.1016/j.ces.2020.116174] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Langlois V, Kaddami A, Pitois O, Perrot C. Acoustics of monodisperse open-cell foam: An experimental and numerical parametric study. J Acoust Soc Am 2020; 148:1767. [PMID: 33003872 DOI: 10.1121/10.0001995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/03/2020] [Indexed: 06/11/2023]
Abstract
This article presents an experimental and numerical parametric study of the acoustical properties of monodisperse open-cell solid foam. Solid foam samples are produced with very good control of both the pore size (from 0.2 to 1.0 mm) and the solid volume fraction (from 6% to 35%). Acoustical measurements are performed by the three-microphone impedance tube method. From these measurements, the visco-thermal parameters-namely, viscous permeability, tortuosity, viscous characteristic length, thermal permeability, and thermal characteristic length-are determined for an extensive number of foam samples. By combining Surface Evolver and finite-element method calculations, the visco-thermal parameters of body centered cubic (bcc) foam numerical samples are also calculated on the whole range of solid volume fraction (from 0.5% to 32%), compared to measured values and to theoretical model predictions [Langlois et al. (2019). Phys. Rev. E 100(1), 013115]. Numerical results are then used to find approximate formulas of visco-thermal parameters. A systematic comparison between measurements and predictions of the Johnson-Champoux-Allard-Lafarge (JCAL) model using measured visco-thermal parameters as input parameters, reveals a consistent agreement between them. From this first step, a calculation of the optimal microstructures maximizing the sound absorption coefficient is performed.
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Affiliation(s)
- V Langlois
- Lab Navier, Univ Gustave Eiffel, ENPC, CNRS, F-77447 Marne-la-Vallée, France
| | - A Kaddami
- Lab Navier, Univ Gustave Eiffel, ENPC, CNRS, F-77447 Marne-la-Vallée, France
| | - O Pitois
- Lab Navier, Univ Gustave Eiffel, ENPC, CNRS, F-77447 Marne-la-Vallée, France
| | - C Perrot
- Univ Gustave Eiffel, Univ Paris Est Creteil, CNRS, MSME UMR 8208, F-77454 Marne-la-Vallée, France
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Pitois O, Kaddami A, Langlois V. Capillary imbibition in open-cell monodisperse foams. J Colloid Interface Sci 2020; 571:166-173. [DOI: 10.1016/j.jcis.2020.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 03/02/2020] [Accepted: 03/04/2020] [Indexed: 11/29/2022]
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Swaminathan K, Panchagnula MV. Spreading and hole formation in natural oil films on aqueous solutions. Colloids Surf A Physicochem Eng Asp 2017; 520:796-804. [DOI: 10.1016/j.colsurfa.2017.02.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Bakhshian S, Sahimi M. Computer simulation of the effect of deformation on the morphology and flow properties of porous media. Phys Rev E 2016; 94:042903. [PMID: 27841555 DOI: 10.1103/physreve.94.042903] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Indexed: 06/06/2023]
Abstract
We report on the results of extensive computer simulation of the effect of deformation on the morphology of a porous medium and its fluid flow properties. The porous medium is represented by packings of spherical particles. Both random and regular as well as dense and nondense packings are used. A quasistatic model based on Hertz's contact theory is used to model the mechanical deformation of the packings, while the evolution of the permeability with the deformation is computed by the lattice-Boltzmann approach. The evolution of the pore-size and pore-length distributions, the porosity, the particles' contacts, the permeability, and the distribution of the stresses that the fluid exerts in the pore space are all studied in detail. The distribution of the pores' lengths, the porosity, and the particles' connectivity change strongly with the application of an external strain to the porous media, whereas the pore-size distribution is not affected as strongly. The permeability of the porous media strongly reduces even when the applied strain is small. When the permeabilities and porosities of the random packings are normalized with respect to their predeformation values, they all collapse onto a single curve, independent of the particle-size distribution. The porosity reduces as a power law with the external strain. The fluid stresses in the pore space follow roughly a log-normal distribution, both before and after deformation.
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Affiliation(s)
- Sahar Bakhshian
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211, USA
| | - Muhammad Sahimi
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089-1211, USA
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Abstract
To what extent are aqueous foams prone to clogging? Foam permeability is measured as a function of particulate loading (trapped hydrophilic particles) under conditions where the particle to bubble size ratio is allowed to increase when the number of particles per bubble is fixed. In addition to experiments performed on the foam scale, we investigated experimentally and numerically the hydrodynamic resistance of a single foam node loaded with one particle. It is shown that, with respect to solid porous media, aqueous foams clog more efficiently due to two reasons: (i) the deformation of interfaces allows for larger particles to be incorporated within the interstitial network and (ii) the interfacial mobility contributes to lowering of the reduced permeability.
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Affiliation(s)
- F Rouyer
- Université Paris Est, Laboratoire Navier, UMR 8205 CNRS - École des Ponts ParisTech - IFSTTAR 5 bd Descartes, 77454 Marne-la-Vallée Cedex 2, France
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Louvet N, Höhler R, Pitois O. Capture of particles in soft porous media. Phys Rev E Stat Nonlin Soft Matter Phys 2010; 82:041405. [PMID: 21230275 DOI: 10.1103/physreve.82.041405] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2010] [Revised: 07/29/2010] [Indexed: 05/30/2023]
Abstract
We investigate the capture of particles in soft porous media. Liquid foam constitutes a model system for such a study, allowing the radii of passage in the pore space to be tuned over several orders of magnitude by adjusting the liquid volume fraction. We show how particle capture is determined by the coupling of interstitial liquid flow and network deformation, and present a simple model of the capture process that shows good agreement with our experimental data.
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Affiliation(s)
- N Louvet
- Laboratoire de Physique des Matériaux Divisés et Interfaces, Université Paris Est, FRE 3300, 5 bvd. Descartes, 77454 Marne la Vallée Cedex 2, France
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Pitois O, Louvet N, Rouyer F. Recirculation model for liquid flow in foam channels. Eur Phys J E Soft Matter 2009; 30:27-35. [PMID: 19756794 DOI: 10.1140/epje/i2009-10502-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2009] [Revised: 06/19/2009] [Accepted: 07/27/2009] [Indexed: 05/28/2023]
Abstract
Although extensively studied in the past, drainage of aqueous foams still offers major unaddressed issues. Among them, the behaviour of foam films during drainage has great significance as the thickness of the films is known to control the Ostwald ripening in foams, which in turn impacts liquid drainage. We propose a model relating the films' behavior to the liquid flow in foam channels. It is assumed that Marangoni-driven recirculation counterflows take place in the transitional region between the foam channel and the adjoining films, and the Gibbs elasticity is therefore introduced as a relevant parameter. The velocity of these counterflows is found to be proportional to the liquid velocity in the channel. The resulting channel permeability is determined and it is shown that Marangoni stresses do not contribute to rigidify the channel's surfaces, in strong contrast with the drainage of horizontal thin liquid films. New experimental data are provided and support the proposed model.
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Affiliation(s)
- O Pitois
- Laboratoire de Physique des Matériaux Divisés et des Interfaces, Université Paris-Est, UMR CNRS 8108, 5 bvd Descartes, 77454 Marne la Vallée Cedex 2, France.
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