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Zawala J, Miguet J, Rastogi P, Atasi O, Borkowski M, Scheid B, Fuller GG. Coalescence of surface bubbles: The crucial role of motion-induced dynamic adsorption layer. Adv Colloid Interface Sci 2023; 317:102916. [PMID: 37269558 DOI: 10.1016/j.cis.2023.102916] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 04/27/2023] [Accepted: 04/29/2023] [Indexed: 06/05/2023]
Abstract
The formation of motion-induced dynamic adsorption layers of surfactants at the surface of rising bubbles is a widely accepted phenomenon. Although their existence and formation kinetics have been theoretically postulated and confirmed in many experimental reports, the investigations primarily remain qualitative in nature. In this paper we present results that, to the best of our knowledge, provide a first quantitative proof of the influence of the dynamic adsorption layer on drainage dynamics of a single foam film formed under dynamic conditions. This is achieved by measuring the drainage dynamics of single foam films, formed by air bubbles of millimetric size colliding against the interface between n-octanol solutions and air. This was repeated for a total of five different surfactant concentrations and two different liquid column heights. All three steps preceding foam film rupture, namely the rising, bouncing and drainage steps, were sequentially examined. In particular, the morphology of the single film formed during the drainage step was analyzed considering the rising and bouncing history of the bubble. It was found that, depending on the motion-induced state of adsorption layer at the bubble surface during the rising and the bouncing steps, single foam film drainage dynamics can be spectacularly different. Using Direct Numerical Simulations (DNS), it was revealed that surfactant redistribution can occur at the bubble surface as a result of the bouncing dynamics (approach-bounce cycles), strongly affecting the interfacial mobility, and leading to slower rates of foam film drainage. Since the bouncing amplitude directly depends on the rising velocity, which correlates in turn with the adsorption layer of surfactants at the bubble surface during the rising step, it is demonstrated that the lifetime of surface bubbles should intimately be related to the history of their formation.
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Affiliation(s)
- Jan Zawala
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland; Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.
| | - Jonas Miguet
- TIPs, Fluid Physics Unit, Université Libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - Preetika Rastogi
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA; Department of Chemical Engineering, Indian Institute of Technology, Chennai 600036, Tamil Nadu, India
| | - Omer Atasi
- TIPs, Fluid Physics Unit, Université Libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - Mariusz Borkowski
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland
| | - Benoit Scheid
- TIPs, Fluid Physics Unit, Université Libre de Bruxelles, B-1050 Bruxelles, Belgium
| | - Gerald G Fuller
- Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA
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Rondepierre G, Lequeux F, Verneuil E, Passade-Boupat N, Talini L. Spinodal stratification in micellar films between oil and silica. Phys Rev E 2021; 103:052801. [PMID: 34134263 DOI: 10.1103/physreve.103.052801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 04/19/2021] [Indexed: 11/07/2022]
Abstract
We report on the thinning mechanisms of supported films of surfactant (nTAB) solutions above the critical micellar concentration. The films are formed by pressing an oil drop immersed in an aqueous surfactant solution on a silica surface. Depending on the length of the carbon chain of the surfactant and its concentration, two modes of destabilization of the stratified films are observed. The first one proceeds by heterogeneous nucleation, characterized by the lateral expansion of the domain of lower thickness as evidenced long ago in suspended micellar films. In addition, the simultaneous stepwise thinning of several domains, called spinodal stratification, is observed here in supported films. We measure the time evolution of the thickness of the films, and we discuss the selection mechanism of each destabilization mode.
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Affiliation(s)
- Gaëlle Rondepierre
- Laboratoire Sciences et Ingénierie de la Matière Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS UMR 7615, F-75005 Paris, France; Laboratoire Physico-Chimie des Interfaces Complexes, ESPCI Paris, 10 rue Vauquelin, F-75231 Paris, France; and TOTAL SA, Pôle dEtudes et Recherche de Lacq, Boîte Postale 47, 64170 Lacq, France
| | - François Lequeux
- Laboratoire Sciences et Ingénierie de la Matire Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS UMR 7615, F-75005 Paris, France and Laboratoire Physico-Chimie des Interfaces Complexes, ESPCI Paris, 10 rue Vauquelin, F-75231 Paris, France
| | - Emilie Verneuil
- Laboratoire Sciences et Ingénierie de la Matire Molle, ESPCI Paris, PSL University, Sorbonne Université, CNRS UMR 7615, F-75005 Paris, France and Laboratoire Physico-Chimie des Interfaces Complexes, ESPCI Paris, 10 rue Vauquelin, F-75231 Paris, France
| | - Nicolas Passade-Boupat
- Laboratoire Physico-Chimie des Interfaces Complexes, Bâtiment CHEMSTARTUP, Route Dpartementale 817, 64170 Lacq, France and TOTAL SA, Pôle dEtudes et Recherche de Lacq, Boîte Postale 47, 64170 Lacq, France
| | - Laurence Talini
- CNRS, Surface du Verre et Interfaces, Saint-Gobain, 93300 Aubervilliers, France
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Wiertel-Pochopien A, Batys P, Zawala J, Kowalczuk PB. Synergistic Effect of Binary Surfactant Mixtures in Two-Phase and Three-Phase Systems. J Phys Chem B 2021; 125:3855-3866. [PMID: 33848150 PMCID: PMC8154601 DOI: 10.1021/acs.jpcb.1c00664] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Cationic alkyltrimethylammonium
bromides (CnTAB, with n = 8, 12, 16, 18) and their
mixtures with n-octanol as a nonionic surfactant
were chosen as a model system to study the synergistic effect on foamability
(two-phase system) and floatability (three-phase system) of quartz
in the presence of binary mixtures of ionic/nonionic surfactants.
The foam height of one-component solutions and binary mixtures and
floatability of quartz particles were characterized as a function
of the surfactant concentration and the number of carbons (n) in the alkyl chain of CnTAB.
The experimental results of foamability and floatability measurements
in one-component and mixed solutions revealed the synergistic effect,
causing a significant enhancement in the foam height and recovery
of quartz. In the presence of n-octanol, the height
of foam increased remarkably for all CnTAB solutions studied, and this effect, whose magnitude depended
on the CnTAB hydrophobic tail length,
could not be justified by a simple increase in total surfactant concentration.
A similar picture was obtained in the case of flotation response.
The mechanism of synergistic effect observed in mixed CnTAB/n-octanol solutions was proposed.
The discussion was supported by molecular dynamics simulations, and
the probable mechanism responsible for synergism was discussed. In
addition, an analysis allowing accurate determination of the concentration
regimes, where the synergistic effect can be expected, was given.
It was shown that for the two-phase system, the n-octanol molecule preadsorption at the liquid/gas interface causes
an increase in CnTAB adsorption coverage
over the level expected from its equilibrium value in the one-component
solution. In the case of the three-phase system, the synergistic effect
was related to the ionic surfactants serving as an anchor layer for n-octanol, which, in water/n-octanol solution
(one-component system), do not adsorb on the surface of quartz.
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Affiliation(s)
- Agata Wiertel-Pochopien
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Piotr Batys
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Jan Zawala
- Jerzy Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek 8, 30-239 Krakow, Poland
| | - Przemyslaw B Kowalczuk
- Department of Geoscience and Petroleum, Norwegian University of Science and Technology, S. P. Andersens veg 15a, 7031 Trondheim, Norway.,Faculty of Chemistry, Wroclaw University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland
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Kannan A, Hristov P, Li J, Zawala J, Gao P, Fuller GG. Surfactant-laden bubble dynamics under porous polymer films. J Colloid Interface Sci 2020; 575:298-305. [DOI: 10.1016/j.jcis.2020.04.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2020] [Revised: 04/20/2020] [Accepted: 04/20/2020] [Indexed: 11/29/2022]
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Zawala J, Malysa K, Kowalczuk PB. On importance of external conditions and properties of the interacting phases in formation and stability of symmetrical and unsymmetrical liquid films. Adv Colloid Interface Sci 2020; 276:102085. [PMID: 31887573 DOI: 10.1016/j.cis.2019.102085] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 12/10/2019] [Accepted: 12/13/2019] [Indexed: 11/30/2022]
Abstract
Importance of external conditions and properties of phases creating liquid films, in outcome of the air bubble collisions with liquid/air and liquid/solids interfaces in clean water and in liquid solutions, is critically reviewed. The review is focussed on initial stages of the liquid films formation by bubbles colliding with interfaces, as well as, on analysis of the most important factors responsible for the collision's outcome, that is, either the rapid bubble bouncing or formation of the symmetrical or unsymmetrical liquid films and their thinning to the critical rupture thicknesses. Data on formation of liquid films under dynamic conditions, both in pure liquids and solutions of electrolytes and various surface-active substances, are reviewed and importance of hydrodynamic boundary conditions at interacting interfaces for energy balance in the system is discussed. It is shown that the liquid films stability, which in stagnant systems are directly determined by properties of the liquid/gas and liquid/solid interfaces, can be quite different in dynamic environment. A mechanism of the bubble bouncing from various interfaces in terms of interplay between energy exchange and kinetics of liquid film drainage is analyzed. It is shown that this mechanism is universal and irrelevant on the nature of interacting phases. Moreover, mechanisms responsible for wetting (unsymmetrical) film stability under dynamic conditions are discussed in light of the most recent studies, showing a crucial role of electrolyte, kind and concentration of surface-active substances, electrical surface charge, hydrophilic/hydrophobic properties of solids and presence of air entrapped (nano- and/or micro-bubbles) at surfaces of highly hydrophobic solids in the liquid films rupture.
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Affiliation(s)
- Jan Zawala
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland.
| | - Kazimierz Malysa
- Jerzy Haber Institute of Catalysis and Surface Chemistry Polish Academy of Sciences, ul. Niezapominajek 8, 30-239 Krakow, Poland
| | - Przemyslaw B Kowalczuk
- Norwegian University of Science and Technology, Department of Geoscience and Petroleum, S. P. Andersens veg 15a, 7031 Trondheim, Norway
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