1
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Song X, Li N, Wang Z, Li S, Hou Y. Vapor-etching honeycomb-like zinc plating layer for constructing anti-corrosion lubricant-infused surfaces. Front Chem 2023; 11:1273674. [PMID: 37841209 PMCID: PMC10568014 DOI: 10.3389/fchem.2023.1273674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 08/30/2023] [Indexed: 10/17/2023] Open
Abstract
Introduction: Biomimetic lubricant-infused porous surfaces are developed and applied for omniphobicity and corrosion protection, which exhibit great advantages compared to superhydrophobic surfaces. Methods: Herein, superhydrophobic Fe@E-Zn@PFOA was prepared via the electrodeposition of laminated Zinc coating, further vapor etching, and post-modification with perfluoro caprylic acid. The facile, inexpensive, and environment-friendly water vapor etching process can form a porous honeycomb-like structure. Moreover, the perfluoropolyether lubricant was wicked into the porous and superhydrophobic surfaces, obtaining lubricant-infused surfaces of Fe@E-Zn@PFOA@PFPE. Results and discussion: The influences of the textured roughness and chemical composition on the surface wettability were systematically investigated. The Fe@E-Zn@PFOA@PFPE performs omniphobicity with small sliding angles and superior corrosion resistance compared with the superhydrophobic surface, owing to their multiple barriers, including infused lubricant, hydrophobic monolayers, and compact Zn electroplating coating. Thus, the proposed lubricant-infused surface may provide insights into constructing protective coatings for the potential applications of engineering metal materials.
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Affiliation(s)
- Xiaorui Song
- Centre for Advanced Laser Manufacturing (CALM), School of Mechanical Engineering, Shandong University of Technology, Zibo, China
| | - Na Li
- Department of Stomatology, Zibo Maternal and Child Health Hospital, Zibo, China
| | - Zhongshan Wang
- Centre for Advanced Laser Manufacturing (CALM), School of Mechanical Engineering, Shandong University of Technology, Zibo, China
| | - Shuangjian Li
- Institute of New Materials, Guangdong Academy of Sciences, National Engineering Laboratory of Modern Materials Surface Engineering Technology, Guangdong, China
| | - Yuanyuan Hou
- Centre for Advanced Laser Manufacturing (CALM), School of Mechanical Engineering, Shandong University of Technology, Zibo, China
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2
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Maleki M, Rokhsar Talabazar F, Seyedmirzaei Sarraf S, Sheibani Aghdam A, Bayraktar S, Tuzcuoğlu E, Koşar A, Ghorbani M. Detergent Dissolution Intensification via Energy-Efficient Hydrodynamic Cavitation Reactors. ACS Omega 2023; 8:29595-29607. [PMID: 37599931 PMCID: PMC10433497 DOI: 10.1021/acsomega.3c03517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 07/18/2023] [Indexed: 08/22/2023]
Abstract
In this study, we explored the potential of hydrodynamic cavitation (HC) for use in dissolution of liquid and powder detergents. For this, microfluidic and polyether ether ketone (PEEK) tube HC reactors with different configurations were employed, and the results from the reactors were compared with a magnetic stirrer, as well as a tergotometer. According to our results PEEK tube HC reactors present the best performance for dissolution of liquid and powder detergents. In the case of liquid detergent, for the same level of initial concentration and comparable final dissolution, the PEEK tube consumed 16.7 and 70% of the energy and time of a tergotometer and 16.7 and 14.8% of that of a magnetic stirrer, respectively. In the case of powder detergent, the PEEK tube used 12% less power than a tergotometer and 81.2% less power than a magnetic stirrer. Additionally, the time required to dissolve the detergent was reduced significantly from 1200 s in the tergotometer and 1800 s in the magnetic stirrer to just 50 s in the PEEK tube. These results suggest that HC could significantly improve the dissolution rate of liquid and powder detergents and energy consumption in washing machines.
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Affiliation(s)
- Mohammadamin Maleki
- Faculty
of Engineering and Natural Science, Sabanci
University, 34956 Tuzla, Istanbul, Turkey
- Sabanci
University Nanotechnology Research and Application Center, 34956 Tuzla, Istanbul, Turkey
| | - Farzad Rokhsar Talabazar
- Faculty
of Engineering and Natural Science, Sabanci
University, 34956 Tuzla, Istanbul, Turkey
- Sabanci
University Nanotechnology Research and Application Center, 34956 Tuzla, Istanbul, Turkey
| | - Seyedali Seyedmirzaei Sarraf
- Faculty
of Engineering and Natural Science, Sabanci
University, 34956 Tuzla, Istanbul, Turkey
- Sabanci
University Nanotechnology Research and Application Center, 34956 Tuzla, Istanbul, Turkey
| | - Araz Sheibani Aghdam
- Faculty
of Engineering and Natural Science, Sabanci
University, 34956 Tuzla, Istanbul, Turkey
- Sabanci
University Nanotechnology Research and Application Center, 34956 Tuzla, Istanbul, Turkey
| | | | | | - Ali Koşar
- Faculty
of Engineering and Natural Science, Sabanci
University, 34956 Tuzla, Istanbul, Turkey
- Sabanci
University Nanotechnology Research and Application Center, 34956 Tuzla, Istanbul, Turkey
- Center
of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics
(EFSUN), Sabanci University, Orhanli, 34956 Tuzla, Istanbul, Turkey
| | - Morteza Ghorbani
- Faculty
of Engineering and Natural Science, Sabanci
University, 34956 Tuzla, Istanbul, Turkey
- Sabanci
University Nanotechnology Research and Application Center, 34956 Tuzla, Istanbul, Turkey
- Center
of Excellence for Functional Surfaces and Interfaces for Nano-Diagnostics
(EFSUN), Sabanci University, Orhanli, 34956 Tuzla, Istanbul, Turkey
- School
of Engineering, Computing and Mathematics, Oxford Brookes University, College Cl, Wheatley, Oxford OX33 1HX, U.K.
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Sett S, Oh J, Cha H, Veriotti T, Bruno A, Yan X, Barac G, Bolton LW, Miljkovic N. Lubricant-Infused Surfaces for Low-Surface-Tension Fluids: The Extent of Lubricant Miscibility. ACS Appl Mater Interfaces 2021; 13:23121-23133. [PMID: 33949848 DOI: 10.1021/acsami.1c02716] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Lubricant-infused surfaces (LISs) and slippery liquid-infused porous surfaces (SLIPSs) have shown remarkable success in repelling low-surface-tension fluids. The atomically smooth, defect-free slippery surface leads to reduced droplet pinning and omniphobicity. However, the presence of a lubricant introduces liquid-liquid interactions with the working fluid. The commonly utilized lubricants for LISs and SLIPSs, although immiscible with water, show various degrees of miscibility with organic polar and nonpolar working fluids. Here, we rigorously investigate the extent of miscibility by considering a wide range of liquid-vapor surface tensions (12-73 mN/m) and different categories of lubricants having a range of viscosities (5-2700 cSt). Using high-fidelity analytical chemistry techniques including X-ray photoelectron spectroscopy, nuclear magnetic resonance, thermogravimetric analysis, and two-dimensional gas chromatography, we quantify lubricant miscibility to parts per billion accuracy. Furthermore, we quantify lubricant concentrations in the collected condensate obtained from prolonged condensation experiments with ethanol and hexane to delineate mixing and shear-based lubricant drainage mechanisms and to predict the lifetime of LISs and SLIPSs. Our work not only elucidates the effect of lubricant properties on miscibility with various fluids but also develops guidelines for developing stable and robust LISs and SLIPSs.
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Affiliation(s)
- Soumyadip Sett
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Junho Oh
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Hyeongyun Cha
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - Tincuta Veriotti
- BP Corporation North America, Inc., 150 West Warrenville Road, Naperville, Illinois 60563, United States
| | - Alessandra Bruno
- BP Corporation North America, Inc., 150 West Warrenville Road, Naperville, Illinois 60563, United States
| | - Xiao Yan
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
| | - George Barac
- BP Corporation North America, Inc., 150 West Warrenville Road, Naperville, Illinois 60563, United States
| | - Leslie W Bolton
- BP plc, Chertsey Road, Sunbury-on-Thames, Middlesex TW16 7LN, U.K
| | - Nenad Miljkovic
- Department of Mechanical Science and Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801, United States
- Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801, United States
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University, 744 Moto-oka, Nishi-ku, Fukuoka 819-0395, Japan
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4
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Abstract
We examine the dynamics of a miscible displacement in a capillary, calculating the nonequilibrium capillary pressure of a moving (and slowly diffusing) miscible meniscus. During the displacement, the capillary pressure varies with time following stretching and smearing of a miscible interface. The capillary pressure remains different from zero for a long time (on a diffusion time scale), slowing the displacement. This capillary pressure is however completely ignored by all theories currently available for practical modeling of miscible displacements in capillaries and porous matrices.
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Affiliation(s)
- Anatoliy Vorobev
- Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, U.K
- Tomsk Polytechnic University, Tomsk 634050, Russia
| | - Sergei Prokopev
- Institute of Continuous Media Mechanics, UB RAS, Perm 614013, Russia
| | - Tatyana Lyubimova
- Institute of Continuous Media Mechanics, UB RAS, Perm 614013, Russia
- Perm State University, Perm 614990, Russia
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5
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Min L, Zhang H, Pan H, Wu F, Hu Y, Sheng Z, Wang M, Zhang M, Wang S, Chen X, Hou X. Controllable Liquid-Liquid Printing with Defect-free, Corrosion-Resistance, Unrestricted Wetting Condition. iScience 2019; 19:93-100. [PMID: 31357171 PMCID: PMC6664161 DOI: 10.1016/j.isci.2019.07.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 07/09/2019] [Accepted: 07/12/2019] [Indexed: 10/26/2022] Open
Abstract
Conventional printing is worth revisiting because of its established procedures in meeting the surging demand of manufacturing printed electronics, 3D products, etc. However, one goal in penetrating printing into these is to control pattern transfer with no limitation of wettability. Here we introduce a miscible liquid-liquid transfer printing mechanism that can synchronize material preparation and material patterning with desirable properties including limitless selection of raw materials, corrosion resistance, no wetting constraint, and ability to prepare large-area defect-free materials for multi-function applications. Theoretical modeling and experiments demonstrate that donor liquid could be used to make patterns within the bulk of a receiver material, allowing the obtained intrinsically patterned functional materials to be resistant to harsh conditions. Different from current liquid printing technologies, this printing approach enables stable and defect-free material preparation and is expected to prove useful in flexible display, soft electronics, 4D printing, and beyond.
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Affiliation(s)
- Lingli Min
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; Research Institute for Biomimetics and Soft Matter, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Haohui Zhang
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Hong Pan
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Feng Wu
- Research Institute for Biomimetics and Soft Matter, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Yuhang Hu
- George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Zhizhi Sheng
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
| | - Miao Wang
- Research Institute for Biomimetics and Soft Matter, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Mengchuang Zhang
- Research Institute for Biomimetics and Soft Matter, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China
| | - Shuli Wang
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China
| | - Xinyu Chen
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xu Hou
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China; Research Institute for Biomimetics and Soft Matter, College of Physical Science and Technology, Xiamen University, Xiamen 361005, China; Collaborative Innovation Center of Chemistry for Energy Materials, Xiamen University, Xiamen 361005, China; State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, China.
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6
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Zagvozkin T, Vorobev A, Lyubimova T. Kelvin-Helmholtz and Holmboe instabilities of a diffusive interface between miscible phases. Phys Rev E 2019; 100:023103. [PMID: 31574712 DOI: 10.1103/physreve.100.023103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Indexed: 05/20/2023]
Abstract
The stability of a shear flow imposed along a diffusive interface that separates two miscible liquids (a heavier liquid lies underneath) is studied using direct numerical simulations. The phase-field approach is employed for description of a thermo- and hydrodynamic evolution of a heterogeneous binary mixture. The approach takes into account the dynamic interfacial stresses at a miscible interface and uses the extended Fick's law for setting the diffusion transport (the diffusion flux is proportional to the gradient of chemical potential). The shear flow is unstable to two kinds of instabilities: (1) the Kelvin-Helmholtz instability, with an immovable vortex formed in the middle of an interface (in the vertical direction) and (2) the Holmboe instability, with traveling waves along the interfacial boundary. The development of the Holmboe instability results in a stronger enhancement of molecular mixing between the mixture components. Earlier, the boundaries of these instabilities were determined using the linear stability analysis and employing the concept of a "frozen interface." In the current work, through the solution of full equations, we obtain the stability boundaries for several sets of governing parameters, showing a greater variety of the possible shapes of the stability diagrams. The Kelvin-Helmholtz instability always occurs at lower gravity effects (lower density contrasts), while the Holmboe instability occurs when gravity is stronger. We show that for some parameters these two instabilities are separated by a zone where the shear flow is stable, and this zone disappears for the other sets of parameters.
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Affiliation(s)
- T Zagvozkin
- Institute of Continuous Media Mechanics UB RAS, Computational Fluid Dynamics Laboratory, Perm 614013, Russia
| | - A Vorobev
- University of Southampton, Faculty of Engineering and Physical Sciences, Southampton SO17 1BJ, United Kingdom
| | - T Lyubimova
- Institute of Continuous Media Mechanics UB RAS, Computational Fluid Dynamics Laboratory, Perm 614013, Russia and Perm State University, Theoretical Physics Department, Perm 614990, Russia
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7
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Affiliation(s)
- Xiaobin Zhan
- State Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanHubei430074China
- School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China
| | - Zhibin Sun
- State Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanHubei430074China
- School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China
| | - Yu He
- State Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanHubei430074China
- School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China
| | - Baojun Shen
- State Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanHubei430074China
- School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China
| | - Tielin Shi
- State Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanHubei430074China
- School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China
| | - Xiwen Li
- State Key Lab of Digital Manufacturing Equipment and TechnologyHuazhong University of Science and TechnologyWuhanHubei430074China
- School of Mechanical Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China
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8
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Sett S, Yan X, Barac G, Bolton LW, Miljkovic N. Lubricant-Infused Surfaces for Low-Surface-Tension Fluids: Promise versus Reality. ACS Appl Mater Interfaces 2017; 9:36400-36408. [PMID: 28950702 DOI: 10.1021/acsami.7b10756] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The past few decades have seen substantial effort for the design and manufacturing of hydrophobic structured surfaces for enhanced steam condensation in water-based applications. Such surfaces promote dropwise condensation and easy droplet removal. However, less priority has been given to applications utilizing low-surface-tension fluids as the condensate. Lubricant-infused surfaces (LISs) or slippery liquid-infused porous surfaces (SLIPSs) have recently been developed, where the atomically smooth, defect-free slippery surface leads to reduced pinning of water droplets and omniphobic characteristics. The remarkable results of LISs and SLIPSs with a range of working fluid droplets give hope of their viability with low-surface-tension condensates. However, the presence of the additional liquid in the form of lubricant brings other issues to consider. Here, in an effort to study the dropwise condensation potential of LISs and SLIPSs, we investigate the miscibility of a range of low-surface-tension fluids with widely used lubricants in LIS and SLIPS design. We consider a wide range of condensate surface tensions (12-73 mN/m) and different categories of lubricants with varied viscosities (5-2700 cSt), namely, fluorinated Krytox oils, hydrocarbon silicone oils, mineral oil, and ionic liquids. In addition, we use both theory and pendant drop experiments to predict the cloaking behavior of the lubricants and immiscible condensate working fluid pairs. Our work not only shows that careful attention must be paid to lubricant-condensate selection to create long-lasting LISs or SLIPSs but also develops lubricant selection design guidelines for stable LISs and SLIPSs for enhanced condensation in applications utilizing low-surface-tension working fluids.
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Affiliation(s)
- Soumyadip Sett
- Department of Mechanical Science and Engineering, University of Illinois , Urbana, Illinois 61801, United States
| | - Xiao Yan
- Department of Mechanical Science and Engineering, University of Illinois , Urbana, Illinois 61801, United States
| | - George Barac
- BP International Limited , 150 W Warrenville Road, Naperville, Illinois 60563, United States
| | - Leslie W Bolton
- BP plc , Chertsey Road, Sunbury-on-Thames, Middlesex TW16 7LN, U.K
| | - Nenad Miljkovic
- Department of Mechanical Science and Engineering, University of Illinois , Urbana, Illinois 61801, United States
- Frederick Seitz Materials Research Laboratory, University of Illinois , Urbana, Illinois 61801, United States
- International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University , 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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9
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Viner G, La Monica T, Lombardo R, Pojman JA. Effect of pseudo-gravitational acceleration on the dissolution rate of miscible drops. Chaos 2017; 27:104603. [PMID: 29092439 DOI: 10.1063/1.4990069] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The effect of pseudo-gravitational acceleration on the dissolution process of two phase miscible systems has been investigated at high acceleration values using a spinning drop tensiometer with three systems: 1-butanol/water, isobutyric acid/water, and triethylamine/water. We concluded that the dissolution process involves at least three different transport phenomena: diffusion, barodiffusion, and gravitational (buoyancy-driven) convection. The last two phenomena are significantly affected by the centrifugal acceleration acting at the interface between the two fluids, and the coupling with the geometry of the dissolving drop leads to a change of the mass flux during the course of the dissolution process.
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Affiliation(s)
- Gloria Viner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Tatiana La Monica
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
| | - Renato Lombardo
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF), Università degli Studi di Palermo, viale delle Scienze, ed. 17, 90128 Palermo, Italy
| | - John A Pojman
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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10
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Vorobev A, Boghi A. Phase-field modelling of a miscible system in spinning droplet tensiometer. J Colloid Interface Sci 2016; 482:193-204. [DOI: 10.1016/j.jcis.2016.07.080] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 07/28/2016] [Accepted: 07/29/2016] [Indexed: 10/21/2022]
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Lombardo R, Calabrese I, Gelardi G, Turco Liveri ML, Pojman JA. The apparently anomalous effects of surfactants on interfacial tension in the IBA/water system near its upper critical solution temperature. Colloid Polym Sci 2016; 294:1425-30. [DOI: 10.1007/s00396-016-3904-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Xie R, Vorobev A. On the phase-field modelling of a miscible liquid/liquid boundary. J Colloid Interface Sci 2016; 464:48-58. [PMID: 26609922 DOI: 10.1016/j.jcis.2015.11.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2015] [Revised: 11/11/2015] [Accepted: 11/12/2015] [Indexed: 11/28/2022]
Abstract
Mixing of miscible liquids is essential for numerous processes in industry and nature. Mixing, i.e. interpenetration of molecules through the liquid/liquid boundary, occurs via interfacial diffusion. Mixing can also involve externally or internally driven hydrodynamic flows, and can lead to deformation or disintegration of the liquid/liquid boundary. At the moment, the mixing dynamics remains poorly understood. The classical Fick's law, generally accepted for description of the diffusion process, does not explain the experimental observations, in particular, the recent experiments with dissolution of a liquid solute by a liquid solvent within a horizontal capillary (Stevar and Vorobev, 2012). We present the results of the numerical study aimed at development of an advanced model for the dissolution dynamics of liquid/liquid binary mixtures. The model is based on the phase-field (Cahn-Hilliard) approach that is used as a physics-based model for the thermo- and hydrodynamic evolution of binary mixtures. Within this approach, the diffusion flux is defined through the gradient of chemical potential, and, in particular, includes the effect of barodiffusion. The dynamic interfacial stresses at the miscible interface are also taken into account. The simulations showed that such an approach can accurately reproduce the shape of the solute/solvent boundary, and some aspects of the diffusion dynamics. Nevertheless, all experimentally-observed features of the diffusion motion of the solute/solvent boundary, were not reproduced.
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Affiliation(s)
- Ruilin Xie
- Energy Technology Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK.
| | - Anatoliy Vorobev
- Energy Technology Research Group, Faculty of Engineering and the Environment, University of Southampton, Southampton SO17 1BJ, UK.
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13
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Gaponenko Y, Torregrosa MM, Yasnou V, Mialdun A, Shevtsova V. Interfacial pattern selection in miscible liquids under vibration. Soft Matter 2015; 11:8221-8224. [PMID: 26365134 DOI: 10.1039/c5sm02110c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We explore the peculiar behaviour of an interface between two miscible liquids of similar (but non-identical) viscosities and densities under horizontal vibration with a frequency less than 25 Hz. Significant differences in the structure of the formed patterns were found between microgravity and ground experiments. In a gravity field, a spatially periodic saw-tooth frozen structure is generated in the interface which dissipates at long times. By contrast, under the low gravity conditions of a parabolic flight, the long lived pattern consists of a series of vertical columns of alternating liquids.
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Affiliation(s)
- Y Gaponenko
- Microgravity Research Center, Université Libre de Bruxelles, CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
| | - M M Torregrosa
- Microgravity Research Center, Université Libre de Bruxelles, CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
| | - V Yasnou
- Microgravity Research Center, Université Libre de Bruxelles, CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
| | - A Mialdun
- Microgravity Research Center, Université Libre de Bruxelles, CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
| | - V Shevtsova
- Microgravity Research Center, Université Libre de Bruxelles, CP-165/62, Av. F.D. Roosevelt, 50, B-1050 Brussels, Belgium.
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14
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Kheniene A, Vorobev A. Linear stability of a horizontal phase boundary subjected to shear motion. Eur Phys J E Soft Matter 2015; 38:77. [PMID: 26174431 DOI: 10.1140/epje/i2015-15077-4] [Citation(s) in RCA: 3] [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: 02/06/2015] [Revised: 05/24/2015] [Accepted: 06/08/2015] [Indexed: 06/04/2023]
Abstract
We investigate the stability of slowly smearing phase boundary that appears at the contact of two miscible liquids. A hydrodynamic flow is imposed along the boundary. The aim is to find out whether the slow diffusive smearing of a boundary can be overrun by faster mixing. The phase-field approach is used to model the evolution of the binary mixture. The linear stability in respect to 2D perturbations is studied. If the heavier liquid lies above the lighter liquid, the interface is unconditionally unstable due to the Rayleigh-Taylor and Kelvin-Helmholtz instabilities. The imposed flow accelerates the growth of the long-wave modes and suppresses the growth of the short-wave perturbations. Viscosity, diffusivity and capillarity reduce the growth of perturbations. If the heavier liquid underlies the lighter one, the interface can be stable. The stability boundaries are defined by the strength of gravity (density contrast) and the intensity of the imposed flow. Thinner interfaces are usually characterised by larger zones of instability. The thermodynamic instability, identified for the thicker interfaces with the thicknesses greater than the thickness of a thermodynamically equilibrium phase boundary, makes such interfaces unconditionally unstable. The zones of instability are enlarged by diffusive and capillary terms. Viscosity plays its stabilising role.
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Affiliation(s)
- A Kheniene
- Faculty of Engineering and the Environment, University of Southampton, Southampton, UK
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Shevtsova V, Gaponenko Y, Yasnou V, Mialdun A, Nepomnyashchy A. Wall-generated pattern on a periodically excited miscible liquid/liquid interface. Langmuir 2015; 31:5550-5553. [PMID: 25961324 DOI: 10.1021/acs.langmuir.5b01229] [Citation(s) in RCA: 3] [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] [Indexed: 06/04/2023]
Abstract
We present a new generic type of pattern generated by bounding walls on the interface between miscible liquids in a horizontally vibrated cell. The pattern is observed in laboratory experiments and numerical simulations below and above the frozen-wave instability threshold. At the threshold, a competition develops between the new "fish-spine" pattern and frozen waves, while above the threshold these two kinds of patterns may coexist in spatially separated domains. We propose a theoretical model for the formation mechanism of the fish-spine pattern and its spreading along the interface.
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Affiliation(s)
- Valentina Shevtsova
- MRC, CP-165/62, Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt, B-1050 Brussels, Belgium
- Department of Mathematics, Technion, Israel Institute of Technology, 32000 Haifa, Israel
| | - Yuri Gaponenko
- MRC, CP-165/62, Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt, B-1050 Brussels, Belgium
- Department of Mathematics, Technion, Israel Institute of Technology, 32000 Haifa, Israel
| | - Viktar Yasnou
- MRC, CP-165/62, Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt, B-1050 Brussels, Belgium
- Department of Mathematics, Technion, Israel Institute of Technology, 32000 Haifa, Israel
| | - Aliaksandr Mialdun
- MRC, CP-165/62, Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt, B-1050 Brussels, Belgium
- Department of Mathematics, Technion, Israel Institute of Technology, 32000 Haifa, Israel
| | - Alexander Nepomnyashchy
- MRC, CP-165/62, Université Libre de Bruxelles (ULB), 50 av. F.D. Roosevelt, B-1050 Brussels, Belgium
- Department of Mathematics, Technion, Israel Institute of Technology, 32000 Haifa, Israel
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