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Chen K, Li J, Wei C, Oron A, Shan Y, Jiang Y. Soft wetting: Substrate softness- and time-dependent droplet/bubble adhesion. J Colloid Interface Sci 2024; 662:87-98. [PMID: 38340517 DOI: 10.1016/j.jcis.2024.02.037] [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: 11/15/2023] [Revised: 01/16/2024] [Accepted: 02/04/2024] [Indexed: 02/12/2024]
Abstract
HYPOTHESIS The droplet/bubble adhesion characteristics depend on the length of the droplet/bubble three-phase contact line. Since the deformation caused by the liquid-gas interfacial tension on the soft substrate, referred as to the wetting ridge, retards contact line spreading and retraction, we conjecture that the droplet/bubble adhesion characteristics depend also on the substrate softness. EXPERIMENTS Soft substrates with various shear moduli are prepared and characterized by the spreading and receding dynamics of water droplets and underwater bubbles. Snap-in and normal adhesion forces of droplets/bubbles on such soft substrates are directly measured along with the visualized droplet/bubble shape profiles. FINDINGS The droplet/bubble snap-in force, which corresponds to the short-time spreading dynamics, decreases with a decrease in the substrate shear modulus because of the retarded contact line spreading. The droplet maximal adhesion force on a soft substrate can be counterintuitively either smaller or larger than its counterpart on the rigid substrate depending on different dwelling times, i.e., the droplet/bubble-substrate contact time before droplet/bubble-substrate separation. The former is attributed to the retarded contact line spreading, whereas the latter is attributed to the retarded contact line retraction. The substrate softness- and dwelling time-dependent droplet/bubble adhesion reported in this study will benefit various applications related to soft substrates.
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Affiliation(s)
- Kaiyuan Chen
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China; Department of Mechanical Engineering, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063, China
| | - Juan Li
- Department of Mechanical Engineering, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063, China; Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Chuanqi Wei
- Department of Mechanical Engineering, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063, China
| | - Alexander Oron
- Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel
| | - Yanguang Shan
- School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China.
| | - Youhua Jiang
- Department of Mechanical Engineering, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063, China; Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa 3200003, Israel; Guangdong Provincial Key Laboratory of Materials and Technologies for Energy Conversion, Guangdong Technion - Israel Institute of Technology, Shantou, Guangdong 515063, China.
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2
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Eftekhari M, Schwarzenberger K, Karakashev SI, Grozev NA, Eckert K. Oppositely charged surfactants and nanoparticles at the air-water interface: Influence of surfactant to nanoparticle ratio. J Colloid Interface Sci 2024; 653:1388-1401. [PMID: 37801849 DOI: 10.1016/j.jcis.2023.09.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 08/18/2023] [Accepted: 09/06/2023] [Indexed: 10/08/2023]
Abstract
HYPOTHESIS The interactions between oppositely charged nanoparticles and surfactants can significantly influence the interfacial properties of the system. Traditionally, in the study of such systems, the nanoparticle concentration is varied while the surfactant concentration is kept constant, or vice versa. However, we believe that a defined variation of both components' concentration is necessary to accurately assess their effects on the interfacial properties of the system. We argue that the effect of nanoparticle-surfactant complexes can only be properly evaluated by keeping the surfactant to nanoparticle ratio constant. EXPERIMENTS Zeta potential, dynamic light scattering, high amplitude surface pressure and surface tension measurements are employed synergistically to characterize the interfacial properties of the nanoparticle-surfactant system. Interferometric experiments are performed to highlight the effect of surface concentration on the stability of thin liquid films. FINDINGS The interfacial properties of surfactant/nanoparticle mixtures are primarily determined by the surfactant/nanoparticle ratio. Below a certain ratio, free surfactant molecules are removed from the solution by the formation of surfactant-nanoparticle complexes. Surprisingly, even though the concentration and hydrophobicity of these complexes do not seem to have a noticeable impact on the surface tension, they do significantly affect the rheological properties of the interface. Above this ratio, free surfactant monomers and nanoparticle-surfactant complexes coexist and can co-adsorb at the interface, changing both the interfacial tension and the interfacial rheology, and thus, for example, the foamability and foam stability of the system.
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Affiliation(s)
- Milad Eftekhari
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany; Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Germany.
| | - Karin Schwarzenberger
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany; Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Germany
| | | | - Nikolay A Grozev
- Department of Physical Chemistry, Sofia University, Sofia, Bulgaria
| | - Kerstin Eckert
- Institute of Fluid Dynamics, Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany; Institute of Process Engineering and Environmental Technology, Technische Universität Dresden, Germany
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Wang J, Xing Y, Gui X, Li G, Cao Y. Experimental and molecular dynamics simulation study on wetting interaction between water droplets and kaolinite surface. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Manica R, Xiang B, Bai T, Ashani MN, Li J, Li M, Zhang Z, Liu Q. Fundamentals of secondary process aids in oilsands extraction. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Rogerio Manica
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Bailin Xiang
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Tianzi Bai
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Mahsa Nazemi Ashani
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Jingqiao Li
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Mingda Li
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Zhiqing Zhang
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Qingxia Liu
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
- College of New Materials and New Energies Shenzhen Technology University Shenzhen PR China
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Sun Y, Zheng Y, Liu C, Zhang Y, Wen S, Song L, Zhao M. Liquid marbles, floating droplets: preparations, properties, operations and applications. RSC Adv 2022; 12:15296-15315. [PMID: 35693225 PMCID: PMC9118372 DOI: 10.1039/d2ra00735e] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 04/21/2022] [Indexed: 12/20/2022] Open
Abstract
Liquid marbles (LMs) are non-wettable droplets formed with a coating of hydrophobic particles. They can move easily across either solid or liquid surfaces since the hydrophobic particles protect the internal liquid from contacting the substrate. In recent years, mainly due to their simple preparation, abundant materials, non-wetting/non-adhesive properties, elasticities and stabilities, LMs have been applied in many fields such as microfluidics, sensors and biological incubators. In this review, the recent advances in the preparation, physical properties and applications of liquid marbles, especially operations and floating abilities, are summarized. Moreover, the challenges to achieve uniformity, slow volatilization and stronger stability are pointed out. Various applications generated by LMs' structural characteristics are also expected.
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Affiliation(s)
- Yukai Sun
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
| | - Yelong Zheng
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
| | - Chuntian Liu
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
| | - Yihan Zhang
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
| | - Shiying Wen
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
| | - Le Song
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
| | - Meirong Zhao
- State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University Tianjin China
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Shui T, Pan M, Lu Y, Zhang J, Liu Q, Nikrityuk PA, Tang T, Liu Q, Zeng H. High-efficiency and durable removal of water-in-heavy oil emulsions enabled by delignified and carboxylated basswood with zwitterionic nanohydrogel coatings. J Colloid Interface Sci 2022; 612:445-458. [PMID: 34999549 DOI: 10.1016/j.jcis.2021.12.146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 11/17/2022]
Abstract
HYPOTHESIS It is hypothesized that grafting zwitterionic nanohydrogel (ZNG) helps to achieve anti-asphaltene properties on cellulosic substrates, thus overcoming the fouling issue of natural cellulosic materials for treating oily emulsions. It is also hypothesized that ZNG coatings enhance the water-binding affinity of the substrates, resulting in an outstanding water-removal performance on asphaltene-stabilized emulsions with long-term stability. EXPERIMENTS A cellulosic substrate was derived from nature basswood via a sequence of delignification and carboxylation processes. The ZNG-DBS composite was then developed by esterification to covalently graft ZNGs on the inner channels of the substrate. The water-binding affinity, wettability, water-removal performance for treating water in asphaltene-stabilized emulsions were evaluated via characterizing the filtration/absorption, and anti-fouling mechanism of the ZNG-DBS. FINDINGS ZNG coatings enhance the hydration capability of the basswood substrate, allowing it to absorb water emulsion droplets protected by asphaltenes in the oil medium without being contaminated. Moreover, superior and stable removal capabilities were achieved by using this unique material to treat asphaltenes-stabilized water-in-oil emulsions with the water residue content of <1.0 and ∼0.065 wt% via cyclic filtration and absorption tests, respectively. Our results demonstrate the successful conversion of widely accessible wood resources to functional materials with great potential in the practical treatment of oily wastewater.
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Affiliation(s)
- Tao Shui
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Mingfei Pan
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Yi Lu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Jiawen Zhang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Qingxia Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Petr A Nikrityuk
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Tian Tang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Qi Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada
| | - Hongbo Zeng
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada.
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8
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Li Z, Chakraborty A, Fuentes J, Zamora E, Vázquez F, Xu Z, Liu Q, Flores C, McCaffrey WC. Study on demulsifier crude oil interactions at oil-water interface for crude oil dehydration. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127526] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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9
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Ami Ahmadi H, Ebadi A, Hosseinalipour SM. Experimental study of bubble-droplet interaction in water; the effect of water salinity on the drainage time. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1930037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Hesam Ami Ahmadi
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
| | - Adel Ebadi
- School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran
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Li D, Wang H, Li C, Liang Y, Yan X, Zhang H. Determination and modulation of the typical interactions among dispersed phases relevant to flotation applications: A review. Adv Colloid Interface Sci 2021; 288:102359. [PMID: 33422930 DOI: 10.1016/j.cis.2020.102359] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 12/04/2020] [Accepted: 12/24/2020] [Indexed: 11/28/2022]
Abstract
Flotation is a process involving multi-components, multi-scales, and gas-liquid-solid three phases, where the material separation is achieved based on the difference in surface hydrophobicity of various constituents. In a flotation system, fluids are usually regarded as the continuous phase, while the dispersed phases refer to scattered particles, bubbles, and droplets with low solubility as a dispersion that is surrounded by the aqueous environment. Fundamentally, the interactions among dispersed phases exist throughout the flotation process, and play distinct roles during different periods. For example, the liquid collector-solid, solid-solid, bubble-bubble and gas bubble-solid interactions are closely associated with the particle surface modification, particle behavior, bubble size evolution and separation in flotation, respectively. Therefore, the influences of each stage are all worthy of concern, and should be spared sufficient attention, which requires to formulate a horizontal writing structure. In this review, instead of summarizing all available characterization techniques or measurements, certain typical examples or methods were consciously chosen to perform analysis or comparison, aiming to summarize recent studies on the determination and modulation of dispersed phase interactions. The determination on the interactions among dispersed phases is helpful for fundamentally understanding the microcosmic process connotations, and their modulation contributes to firmly providing macroscopic optimization schemes for practical applications. By integrating some typically available theoretical calculations and experimental measurements related to the dispersed phase interactions, the present article is devoted to revealing the influential factors, finding out the current challenges or knowledge gaps, and affording certain references or suggestions for future investigations.
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Affiliation(s)
- Danlong Li
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Hainan Wang
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Chenwei Li
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Yannan Liang
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Xiaokang Yan
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China
| | - Haijun Zhang
- National Engineering Research Center for Coal Preparation and Purification, China University of Mining and Technology, 221116 Xuzhou, China; School of Chemical Engineering and Technology, China University of Mining and Technology, 221116 Xuzhou, China.
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11
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Han S, Nguyen AV, Kim K, Park JK, You K. Quantitative Analysis of Attachment Time of Air Bubbles to Solid Surfaces in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:616-626. [PMID: 32031822 DOI: 10.1021/acs.langmuir.9b02773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The attachment of air bubbles to solid surfaces in water is encountered in many natural processes and industrial applications. It has been established that the attachment can occur between hydrophobic surfaces and air bubbles. In this paper, we present novel experimental results to quantify the attachment in terms of the attachment time. We show that the attachment time can be determined from either the transient force curve or the transient film thickness. These techniques for determining the attachment time are based on the fact that the rupture of a thin liquid film produces a large attachment force and a rapid expansion of the three-phase contact radius in comparison with the expansion of the film radius. The experimental results are quantitatively analyzed using thin-film drainage theory and intermolecular forces, which include the advanced multilayer van der Waals force and the electrical double-layer force. The advanced van der Waals force theory allows us to incorporate the effect of interfacial gas enrichment (IGE) of dissolved gas in water at hydrophobic surfaces on the bubble-surface attachment. Critically, if the presence of IGE is ignored, the experimental results do not agree with the theory. Finally, IGE is shown to be a significant factor in controlling hydrophobic attraction between an air bubble and a hydrophobic surface and their attachment.
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Affiliation(s)
- Seongsoo Han
- Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Republic of Korea
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Anh V Nguyen
- School of Chemical Engineering, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Kwanho Kim
- Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Republic of Korea
| | - Jai-Koo Park
- Department of Earth Resources and Environmental Engineering, Hanyang University, 222, Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Kwangsuk You
- Convergence Research Center for Development of Mineral Resources (DMR), Korea Institute of Geoscience and Mineral Resources (KIGAM), 124 Gwahak-ro, Yuseong-gu, Daejeon 34132, Republic of Korea
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Narayan S, Metaxas AE, Bachnak R, Neumiller T, Dutcher CS. Zooming in on the role of surfactants in droplet coalescence at the macroscale and microscale. Curr Opin Colloid Interface Sci 2020. [DOI: 10.1016/j.cocis.2020.08.010] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Lu Y, Li R, Manica R, Liu Q, Xu Z. Enhancing oil–solid and oil–water separation in heavy oil recovery by
CO
2
‐responsive surfactants. AIChE J 2020. [DOI: 10.1002/aic.17033] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Yi Lu
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Rui Li
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Rogerio Manica
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Qingxia Liu
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta Canada
- Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen China
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Narayan S, Makhnenko I, Moravec DB, Hauser BG, Dallas AJ, Dutcher CS. Insights into the Microscale Coalescence Behavior of Surfactant-Stabilized Droplets Using a Microfluidic Hydrodynamic Trap. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:9827-9842. [PMID: 32693603 DOI: 10.1021/acs.langmuir.0c01414] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Coalescence of micrometer-scale droplets is impacted by several parameters, including droplet size, viscosities of the two phases, droplet velocity, angle of approach, as well as interfacial tension and surfactant coverage. The thinning dynamics of films between coalescing droplets can be particularly complex in the presence of surfactants, due to the generation of Marangoni stresses and reduced film mobility. Here, a microfluidic hydrodynamic "Stokes" trap is used to gently steer and trap surfactant-laden micrometer-sized droplets at the center of a cross-slot. Water droplets are formed upstream of the cross-slot using a microfluidic T-junction, in heavy and light mineral oils and stabilized using SPAN 80, an oil-soluble surfactant. Incoming droplets are made to coalesce with the trapped droplet, yielding measurements of the film drainage time. Film drainage times are measured as a function of continuous phase viscosity, incoming droplet speed, trapped droplet size, and surfactant concentrations above and below the critical micelle concentration (CMC). As expected, systems with higher surfactant concentrations and slower incoming droplet speed exhibit longer film drainage times. At low surfactant concentrations, the drainage time is longer for the more viscous heavy mineral oil in the continuous phase, whereas at high surfactant concentrations, the dependence on continuous phase viscosity vanishes. Perhaps more surprisingly, larger droplets and high confinement also result in longer film drainage times, potentially due to deformation of the droplet interfaces. The results are used here to determine critical conditions for coalescence, including both an upper and a lower critical capillary number. Moreover, it is shown that induced surfactant concentration gradient effects enable coalescence events after the droplets had originally flocculated, at surfactant concentrations above the CMC. The microfluidic hydrodynamic trap provides new insights into the role of surfactants in film drainage and opens avenues for controlled coalescence studies at micrometer length scales and millisecond time scales.
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Affiliation(s)
- Shweta Narayan
- Department of Mechanical Engineering, University of Minnesota-Twin Cities, Minneapolis, MN 55455, United States
| | - Iaroslav Makhnenko
- Department of Mechanical Engineering, University of Minnesota-Twin Cities, Minneapolis, MN 55455, United States
| | - Davis B Moravec
- Donaldson Company, Inc., Bloomington, MN 55431, United States
| | - Brad G Hauser
- Donaldson Company, Inc., Bloomington, MN 55431, United States
| | - Andrew J Dallas
- Donaldson Company, Inc., Bloomington, MN 55431, United States
| | - Cari S Dutcher
- Department of Mechanical Engineering, University of Minnesota-Twin Cities, Minneapolis, MN 55455, United States
- Department of Chemical Engineering and Materials Science, University of Minnesota-Twin Cities, Minneapolis, MN 55455, United States
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Zhang Y, Xing Y, Ding S, Cao Y, Gui X. New method to measure interaction force between particle and air bubble/water droplet using a micro-Newton mechanics testing instrument. POWDER TECHNOL 2020. [DOI: 10.1016/j.powtec.2020.06.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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16
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Sun Y, Li Y, Dong X, Bu X, Drelich JW. Spreading and adhesion forces for water droplets on methylated glass surfaces. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124562] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Chen Z, Liu B, Manica R, Liu Q, Xu Z. Interaction Between the Cyclopentane Hydrate Particle and Water Droplet in Hydrocarbon Oil. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:2063-2070. [PMID: 32027508 DOI: 10.1021/acs.langmuir.9b03887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The presence of immiscible water drops in bulk hydrocarbon is likely to bridge hydrate particles to cause hydrate agglomeration, leading to potential pipeline blockage. This can become a major challenge for flow assurance in offshore petroleum transportation. To avoid hydrate aggregation, the attachment between hydrate and water drops should be avoided. In this study, we used our home-designed integrated thin film drainage apparatus to investigate the interactions between a hydrate particle and a water drop inside model oil (i.e., mixture of cyclopentane and toluene with a volumetric ratio of 1:1). Our experiments showed that asphaltenes, a natural component in crude oil, were an effective inhibitor for the attachment between water drops and hydrate particles. Without asphaltenes in the system, the water drop adhered to the hydrate particle immediately after the two surfaces contacted. By adding 0.03 g/L asphaltenes into the oil phase, the attachment was delayed by 0.7 s when the applied preload force was set to around 0.05 mN. By increasing the asphaltenes addition to 0.05 g/L, the attachment between the hydrate and water drop was prevented even when the contact time lasted up to 25 s. This phenomenon could be explained by the adsorption of an asphaltenes layer along the interface between the aqueous drop and hydrocarbon. Measurements of the dynamic interfacial tension and crumping ratio confirmed the presence of the adsorption layer. The addition of 0.6 mol/L NaCl or 0.3 mol/L CaCl2 in the aqueous drop could further enhance the strength of the adsorption layer. Results of this research provide understanding of the benefits of asphaltenes and salt in preventing hydrate agglomeration.
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Affiliation(s)
- Zihui Chen
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada
| | - Bo Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada
| | - Rogerio Manica
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada
| | - Qingxia Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton T6G 1H9, Canada
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Dudek M, Vik EA, Aanesen SV, Øye G. Colloid chemistry and experimental techniques for understanding fundamental behaviour of produced water in oil and gas production. Adv Colloid Interface Sci 2020; 276:102105. [PMID: 31978641 DOI: 10.1016/j.cis.2020.102105] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 01/08/2020] [Accepted: 01/08/2020] [Indexed: 01/30/2023]
Abstract
Due to increasing volumes of produced water and environmental concerns related to its discharge, water treatment has become a major challenge during the production of crude oil and natural gas. With continuously stricter regulations for discharging produced water to sea, the operators are obliged to look for ways to improve the treatment processes or re-use the water in a beneficial way, for example as a pressure support during oil recovery (produced water re-injection). To improve the knowledge of the underlying phenomena governing separation processes, detailed information of the composition and interfacial properties of produced water is undoubtedly useful and could provide valuable input for better understanding and improving separation models. This review article summarizes knowledge gained about produced water composition and the most common treatment technologies, which are later used to describe the fundamental phenomena occurring during separation. These colloidal interactions, such as coalescence of oil droplets, bubble-droplet attachment or partitioning of components between oil and water, are of crucial importance for the performance of various technologies and are sometimes overlooked in physical considerations of produced water treatment. The last part of the review deals with the experimental methodologies that are available to study these phenomena, provide data for models and support development of more efficient separation processes.
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19
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Interfacial properties pertinent to W/O and O/W emulsion systems prepared using polyaromatic compounds. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Han S, You K, Kim K, Park J. Measurement of the Attachment Force between an Air Bubble and a Mineral Surface: Relationship between the Attachment Force and Flotation Kinetics. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:9364-9373. [PMID: 31287321 DOI: 10.1021/acs.langmuir.9b00758] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The interaction forces between air bubbles and mineral surfaces were directly measured during the attachment process using an apparatus developed in our laboratory, and they are defined as the attachment forces. The attachment forces were measured between the air bubble and mineral surfaces modified with surfactants to have different hydrophobicities. Chalcopyrite and galena were used as the mineral surfaces, and their hydrophobicity was controlled by adsorbing xanthates with different hydrocarbon chain lengths. The hydrophobicity is represented by the static contact angle of water on the mineral surface. When the static contact angle was less than 90°, the attachment force increased considerably with increasing static contact angle of the surfaces, irrespective of the mineral type or the hydrocarbon chain length of the adsorbed xanthate. The hydrophobicity of the mineral surface is found to be the dominant factor determining the attachment force. The measured attachment forces agree well with those calculated based on the force balance model derived from the capillary force and Laplace pressure equation. Microflotation experiments to examine the relationship between the attachment force and flotation kinetics were carried out under the same conditions to control surface hydrophobicity. The variation in the flotation kinetic constants and attachment forces with the water contact angle are very similar. As a result, the attachment forces measured by the developed apparatus can provide quantitative information on the interaction between an air bubble and the mineral surface and can be used for predicting the flotation kinetics.
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Affiliation(s)
- Seongsoo Han
- Convergence Research Center for Development of Mineral Resources (DMR) , Korea Institute of Geoscience and Mineral Resources (KIGAM) , 124 Gwahak-ro, Yuseong-gu , Daejeon 34132 , Republic of Korea
- Department of Earth Resources and Environmental Engineering , Hanyang University , 222, Wangsimni-ro, Seongdong-gu , Seoul 04763 , Republic of Korea
| | - Kwangsuk You
- Convergence Research Center for Development of Mineral Resources (DMR) , Korea Institute of Geoscience and Mineral Resources (KIGAM) , 124 Gwahak-ro, Yuseong-gu , Daejeon 34132 , Republic of Korea
| | - Kwanho Kim
- Convergence Research Center for Development of Mineral Resources (DMR) , Korea Institute of Geoscience and Mineral Resources (KIGAM) , 124 Gwahak-ro, Yuseong-gu , Daejeon 34132 , Republic of Korea
| | - Jaikoo Park
- Department of Earth Resources and Environmental Engineering , Hanyang University , 222, Wangsimni-ro, Seongdong-gu , Seoul 04763 , Republic of Korea
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21
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Forces between oil drops in polymer-surfactant systems: Linking direct force measurements to microfluidic observations. J Colloid Interface Sci 2019; 544:130-143. [DOI: 10.1016/j.jcis.2019.02.051] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/15/2019] [Accepted: 02/16/2019] [Indexed: 11/22/2022]
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22
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Miklavcic SJ, Fung C. Quantifying the force between mercury and mica across an ionic liquid using white light interferometry. J Colloid Interface Sci 2019; 538:218-227. [PMID: 30508742 DOI: 10.1016/j.jcis.2018.11.079] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 11/20/2018] [Accepted: 11/20/2018] [Indexed: 11/29/2022]
Abstract
HYPOTHESIS Under axisymmetric conditions, changes in the thickness of the thin film between a fluid drop and a solid revealed by white light interferometry can provide information about the interaction of the bodies. Thus, in principle one can quantify the force between the surfaces using interferometric information of film thickness profile. This is needed to quantify and analyze drop-solid interactions across complex fluids such as an ionic liquid to independently characterize new surface forces. EXPERIMENTS Interferometric fringes were obtained in experiments on the interaction between a mercury drop and mica across a film of room temperature ionic liquid. The data is analyzed using a novel formula giving the total force acting on the drop. The calculations are compared with two other approaches to estimating forces. Qualitative and quantitative differences are discussed. FINDINGS This is the first report of forces measured between mercury and mica across an ionic liquid. The system is subjected to different applied electric potentials. In each case a long ranged, exponentially decaying repulsive force is found. At small separations, the system becomes unstable and the surfaces jump into contact. The comparison of force calculation methods demonstrates the superiority of the force approach proposed here.
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Affiliation(s)
- S J Miklavcic
- Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes, SA 5095, Australia.
| | - C Fung
- Phenomics and Bioinformatics Research Centre, School of Information Technology and Mathematical Sciences, University of South Australia, Mawson Lakes, SA 5095, Australia
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23
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Effects of a naturally derived surfactant on hydrate anti-agglomeration using micromechanical force measurement. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.06.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Liu B, Manica R, Zhang X, Bussonnière A, Xu Z, Xie G, Liu Q. Dynamic Interaction between a Millimeter-Sized Bubble and Surface Microbubbles in Water. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:11667-11675. [PMID: 30183304 DOI: 10.1021/acs.langmuir.8b01202] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The coalescence between microbubbles and millimeter-sized bubbles is an elementary process in various industrial applications such as froth flotation and wastewater treatment. Fundamental understanding of the coalescence behavior between two colliding bubbles requires knowledge of water drainage from the thin liquid film between the deformable air-water surfaces, a simple phenomenon with high complexity in physics because of the interplay of surface forces, hydrodynamic drainage, and surface rheology. In this work, we performed simultaneous measurements of the interaction force and spatial thin-film thickness during the collision between a millimeter-sized bubble (radius 1.2 mm) and surface microbubbles (radii between 30 and 700 μm) using our recently developed dynamic force apparatus. The interaction force during the collision agrees well with the prediction from the Stokes-Reynolds-Young-Laplace model with the tangentially immobile boundary condition at the air-liquid interface. However, the measured coalescence times for different bubble sizes are shorter than the model predictions, possibly caused by a rapid drainage behavior along with the loss of symmetry of the thin liquid film. In dozens of experimental runs, the bubbles coalesced at a critical film thickness of 25 ± 15 nm, which agrees reasonably well with the predicted rupture thickness using attractive van der Waals interaction force. These results suggest that the nonsymmetric drainage process, rather than the rupture thickness, contributes to the scattering of the experimental coalescence time between two fast-colliding air bubbles. Furthermore, our results suggest that smaller surface bubbles (30-100 μm) are more effective for the attachment onto a large bubble as the coalescence time decreases considerably when the microbubbles are smaller than 100 μm.
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Affiliation(s)
- Bo Liu
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton T6G 1H9 , Canada
| | - Rogerio Manica
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton T6G 1H9 , Canada
| | - Xurui Zhang
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton T6G 1H9 , Canada
| | - Adrien Bussonnière
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton T6G 1H9 , Canada
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton T6G 1H9 , Canada
| | - Guangyuan Xie
- Department of Chemical Engineering , China University of Mining and Technology , Xuzhou 221116 , China
| | - Qingxia Liu
- Department of Chemical and Materials Engineering , University of Alberta , Edmonton T6G 1H9 , Canada
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25
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Xing Y, Gui X, Pan L, Pinchasik BE, Cao Y, Liu J, Kappl M, Butt HJ. Recent experimental advances for understanding bubble-particle attachment in flotation. Adv Colloid Interface Sci 2017; 246:105-132. [PMID: 28619381 DOI: 10.1016/j.cis.2017.05.019] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/29/2017] [Accepted: 05/30/2017] [Indexed: 11/27/2022]
Abstract
Bubble-particle interaction is of great theoretical and practical importance in flotation. Significant progress has been achieved over the past years and the process of bubble-particle collision is reasonably well understood. This, however, is not the case for bubble-particle attachment leading to three-phase contact line formation due to the difficulty in both theoretical analysis and experimental verification. For attachment, surface forces play a major role. They control the thinning and rupture of the liquid film between the bubble and the particle. The coupling between force, bubble deformation and film drainage is critical to understand the underlying mechanism responsible for bubble-particle attachment. In this review we first discuss the advances in macroscopic experimental methods for characterizing bubble-particle attachment such as induction timer and high speed visualization. Then we focus on advances in measuring the force and drainage of thin liquid films between an air bubble and a solid surface at a nanometer scale. Advances, limits, challenges, and future research opportunities are discussed. By combining atomic force microscopy and reflection interference contrast microscopy, the force, bubble deformation, and liquid film drainage can be measured simultaneously. The simultaneous measurement of the interaction force and the spatiotemporal evolution of the confined liquid film hold great promise to shed new light on flotation.
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Affiliation(s)
- Yaowen Xing
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Xiahui Gui
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China; Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Lei Pan
- Department of Chemical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton 49931, USA
| | - Bat-El Pinchasik
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Yijun Cao
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Jiongtian Liu
- Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China
| | - Michael Kappl
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
| | - Hans-Jürgen Butt
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany.
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26
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Li M, Tian J, Liu C, Geng K. Effects of sorbitan monooleate on the interactions between cyclopentane hydrate particles and water droplets. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2017.1318706] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mingzhong Li
- College of Petroleum Engineering, China University of Petroleum, Qingdao, China
| | - Jinlin Tian
- College of Petroleum Engineering, China University of Petroleum, Qingdao, China
| | - Chenwei Liu
- College of Petroleum Engineering, China University of Petroleum, Qingdao, China
| | - Kaili Geng
- College of Petroleum Engineering, China University of Petroleum, Qingdao, China
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27
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Ivanova NO, Xu Z, Liu Q, Masliyah JH. Surface forces in unconventional oil processing. Curr Opin Colloid Interface Sci 2017. [DOI: 10.1016/j.cocis.2016.09.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Berry JD, Dagastine RR. Mapping coalescence of micron-sized drops and bubbles. J Colloid Interface Sci 2017; 487:513-522. [DOI: 10.1016/j.jcis.2016.10.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/17/2016] [Accepted: 10/18/2016] [Indexed: 12/25/2022]
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29
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Zhang X, Tchoukov P, Manica R, Wang L, Liu Q, Xu Z. Simultaneous measurement of dynamic force and spatial thin film thickness between deformable and solid surfaces by integrated thin liquid film force apparatus. SOFT MATTER 2016; 12:9105-9114. [PMID: 27782274 DOI: 10.1039/c6sm02067d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Interactions involving deformable surfaces reveal a number of distinguishing physicochemical characteristics that do not exist in interactions between rigid solid surfaces. A unique fully custom-designed instrument, referred to as integrated thin liquid film force apparatus (ITLFFA), was developed to study the interactions between one deformable and one solid surface in liquid. Incorporating a bimorph force sensor with interferometry, this device allows for the simultaneous measurement of the time-dependent interaction force and the corresponding spatiotemporal film thickness of the intervening liquid film. The ITLFFA possesses the specific feature of conducting measurement under a wide range of hydrodynamic conditions, with a displacement velocity of deformable surfaces ranging from 2 μm s-1 to 50 mm s-1. Equipped with a high speed camera, the results of a bubble interacting with hydrophilic and partially hydrophobic surfaces in aqueous solutions indicated that ITLFFA can provide information on interaction forces and thin liquid film drainage dynamics not only in a stable film but also in films of the quick rupture process. The weak interaction force was extracted from a measured film profile. Because of its well-characterized experimental conditions, ITLFFA permits the accurate and quantitative comparison/validation between measured and calculated interaction forces and temporal film profiles.
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Affiliation(s)
- Xurui Zhang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, CanadaT6G 1H9
| | - Plamen Tchoukov
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, CanadaT6G 1H9
| | - Rogerio Manica
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, CanadaT6G 1H9
| | - Louxiang Wang
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, CanadaT6G 1H9
| | - Qingxia Liu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, CanadaT6G 1H9
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering, University of Alberta, Edmonton, Alberta, CanadaT6G 1H9
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30
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Liu C, Li M, Zhang G, Koh CA. Direct measurements of the interactions between clathrate hydrate particles and water droplets. Phys Chem Chem Phys 2015; 17:20021-9. [PMID: 26172876 DOI: 10.1039/c5cp02247a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Clathrate hydrate particle agglomeration is often considered to be one of the key limiting factors in plug formation. The hydrate particle-water interaction can play a critical role in describing hydrate agglomeration, yet is severely underexplored. Therefore, this work investigates the interactions between water droplets and cyclopentane hydrate particles using a micromechanical force (MMF) apparatus. Specifically, the effect of contact time, temperature/subcooling, contact area, and the addition of Sorbitane monooleate (Span 80) surfactant on the water droplet-hydrate particle interaction behavior are studied. The measurements indicate that hydrate formation during the measurement would increase the water-hydrate interaction force significantly. The results also indicate that the contact time, subcooling and concentration of cyclopentane, which determine the hydrate formation rate and hydrate amount, will affect the hydrate-water interaction force. In addition, the interaction forces also increase with the water-hydrate contact area. The addition of Span 80 surfactant induces a change in the hydrate morphology and renders the interfaces stable versus unstable (leading to coalescence), and the contact force can affect the hydrate-water interaction behavior significantly. Compared with the hydrate-hydrate cohesion force (measured in cyclopentane), the hydrate-water adhesion force is an order of magnitude larger. These new measurements can help to provide new and critical insights into the hydrate agglomeration process and potential strategies to control this process.
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Affiliation(s)
- Chenwei Liu
- College of Petroleum Engineering, China University of Petroleum, Qingdao 266580, China
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31
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Shi C, Cui X, Zhang X, Tchoukov P, Liu Q, Encinas N, Paven M, Geyer F, Vollmer D, Xu Z, Butt HJ, Zeng H. Interaction between Air Bubbles and Superhydrophobic Surfaces in Aqueous Solutions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:7317-7327. [PMID: 26065326 DOI: 10.1021/acs.langmuir.5b01157] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Superhydrophobic surfaces are usually characterized by a high apparent contact angle of water drops in air. Here we analyze the inverse situation: Rather than focusing on water repellency in air, we measure the attractive interaction of air bubbles and superhydrophobic surfaces in water. Forces were measured between microbubbles with radii R of 40-90 μm attached to an atomic force microscope cantilever and submerged superhydrophobic surfaces. In addition, forces between macroscopic bubbles (R = 1.2 mm) at the end of capillaries and superhydrophobic surfaces were measured. As superhydrophobic surfaces we applied soot-templated surfaces, nanofilament surfaces, micropillar arrays with flat top faces, and decorated micropillars. Depending on the specific structure of the superhydrophobic surfaces and the presence and amount of entrapped air, different interactions were observed. Soot-templated surfaces in the Cassie state showed superaerophilic behavior: Once the electrostatic double-layer force and a hydrodynamic repulsion were overcome, bubbles jumped onto the surface and fully merged with the entrapped air. On nanofilaments and micropillar arrays we observed in addition the formation of sessile bubbles with finite contact angles below 90° or the attachment of bubbles, which retained their spherical shape.
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Affiliation(s)
- Chen Shi
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Xin Cui
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Xurui Zhang
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Plamen Tchoukov
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Qingxia Liu
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Noemi Encinas
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Maxime Paven
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Florian Geyer
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Doris Vollmer
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Zhenghe Xu
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
| | - Hans-Jürgen Butt
- ‡Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Hongbo Zeng
- †Department of Chemical and Materials Engineering, University of Alberta, Edmonton, AB T6G 2R3, Canada
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32
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Studying bubble–particle interactions by zeta potential distribution analysis. J Colloid Interface Sci 2015; 449:399-408. [DOI: 10.1016/j.jcis.2015.01.040] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/14/2015] [Accepted: 01/15/2015] [Indexed: 11/19/2022]
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33
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Measurement and modeling on hydrodynamic forces and deformation of an air bubble approaching a solid sphere in liquids. Adv Colloid Interface Sci 2015; 217:31-42. [PMID: 25595420 DOI: 10.1016/j.cis.2014.12.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 10/09/2014] [Accepted: 12/07/2014] [Indexed: 11/23/2022]
Abstract
The interaction between bubbles and solid surfaces is central to a broad range of industrial and biological processes. Various experimental techniques have been developed to measure the interactions of bubbles approaching solids in a liquid. A main challenge is to accurately and reliably control the relative motion over a wide range of hydrodynamic conditions and at the same time to determine the interaction forces, bubble-solid separation and bubble deformation. Existing experimental methods are able to focus only on one of the aspects of this problem, mostly for bubbles and particles with characteristic dimensions either below 100 μm or above 1 cm. As a result, either the interfacial deformations are measured directly with the forces being inferred from a model, or the forces are measured directly with the deformations to be deduced from the theory. The recently developed integrated thin film drainage apparatus (ITFDA) filled the gap of intermediate bubble/particle size ranges that are commonly encountered in mineral and oil recovery applications. Equipped with side-view digital cameras along with a bimorph cantilever as force sensor and speaker diaphragm as the driver for bubble to approach a solid sphere, the ITFDA has the capacity to measure simultaneously and independently the forces and interfacial deformations as a bubble approaches a solid sphere in a liquid. Coupled with the thin liquid film drainage modeling, the ITFDA measurement allows the critical role of surface tension, fluid viscosity and bubble approach speed in determining bubble deformation (profile) and hydrodynamic forces to be elucidated. Here we compare the available methods of studying bubble-solid interactions and demonstrate unique features and advantages of the ITFDA for measuring both forces and bubble deformations in systems of Reynolds numbers as high as 10. The consistency and accuracy of such measurement are tested against the well established Stokes-Reynolds-Young-Laplace model. The potential to use the design principles of the ITFDA for fundamental and developmental research is demonstrated.
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34
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He L, Lin F, Li X, Sui H, Xu Z. Interfacial sciences in unconventional petroleum production: from fundamentals to applications. Chem Soc Rev 2015; 44:5446-94. [DOI: 10.1039/c5cs00102a] [Citation(s) in RCA: 203] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
With the ever increasing demand for energy to meet the needs of growth in population and improvement in the living standards, in particular in developing countries, the abundant unconventional oil reserves (about 70% of total world oil), such as heavy oil, oil/tar sands and shale oil, are playing an increasingly important role in securing global energy supply.
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Affiliation(s)
- Lin He
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
| | - Feng Lin
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
| | - Xingang Li
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- P. R. China
- National Engineering Research Centre of Distillation Technology
| | - Hong Sui
- School of Chemical Engineering and Technology
- Tianjin University
- Tianjin
- P. R. China
- National Engineering Research Centre of Distillation Technology
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering
- University of Alberta
- Edmonton
- Canada
- Institute of Nuclear and New Energy Technology
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35
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Harbottle D, Chen Q, Moorthy K, Wang L, Xu S, Liu Q, Sjoblom J, Xu Z. Problematic stabilizing films in petroleum emulsions: shear rheological response of viscoelastic asphaltene films and the effect on drop coalescence. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:6730-6738. [PMID: 24845467 DOI: 10.1021/la5012764] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Adsorption of asphaltenes at the water-oil interface contributes to the stability of petroleum emulsions by forming a networked film that can hinder drop-drop coalescence. The interfacial microstructure can either be liquid-like or solid-like, depending on (i) initial bulk concentration of asphaltenes, (ii) interfacial aging time, and (iii) solvent aromaticity. Two techniques--interfacial shear rheology and integrated thin film drainage apparatus--provided equivalent interface aging conditions, enabling direct correlation of the interfacial rheology and droplet stability. The shear rheological properties of the asphaltene film were found to be critical to the stability of contacting drops. With a viscous dominant interfacial microstructure, the coalescence time for two drops in intimate contact was rapid, on the order of seconds. However, as the elastic contribution develops and the film microstructure begins to be dominated by elasticity, the two drops in contact do not coalescence. Such step-change transition in coalescence is thought to be related to the high shear yield stress (~10(4) Pa), which is a function of the film shear yield point and the film thickness (as measured by quartz crystal microbalance), and the increased elastic stiffness of the film that prevents mobility and rupture of the asphaltene film, which when in a solid-like state provides an energy barrier against drop coalescence.
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Affiliation(s)
- David Harbottle
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta Canada T6G 2V4
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36
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Li EQ, Vakarelski IU, Chan DYC, Thoroddsen ST. Stabilization of thin liquid films by repulsive van der Waals force. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5162-5169. [PMID: 24761748 DOI: 10.1021/la500868y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using high-speed video recording of bubble rise experiments, we study the stability of thin liquid films trapped between a rising bubble and a surfactant-free liquid-liquid meniscus interface. Using different combinations of nonpolar oils and water that are all immiscible, we investigate the extent to which film stability can be predicted by attractive and repulsive van der Waals (vdW) interactions that are indicated by the relative magnitude of the refractive indices of the liquid combinations, for example, water (refractive index, n = 1.33), perfluorohexane (n = 1.23), and tetradecane (n = 1.43). We show that, when the film-forming phase was oil (perfluorohexane or tetradecane), the stability of the film could always be predicted from the sign of the vdW interaction, with a repulsive vdW force resulting in a stable film and an attractive vdW force resulting in film rupture. However, if aqueous electrolyte is the film-forming bulk phase between the rising air bubble and the upper oil phase, the film always ruptured, even when a repulsive vdW interaction was predicted. We interpret these results as supporting the hypothesis that a short-ranged hydrophobic attraction determines the stability of the thin water film formed between an air phase and a nonpolar oil phase.
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Affiliation(s)
- Er Qiang Li
- Division of Physical Sciences and Engineering & Clean Combustion Research Center, King Abdullah University of Science and Technology (KAUST) , Thuwal, 23955-6900, Saudi Arabia
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37
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Tabor RF, Grieser F, Dagastine RR, Chan DYC. The hydrophobic force: measurements and methods. Phys Chem Chem Phys 2014; 16:18065-75. [DOI: 10.1039/c4cp01410c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The hydrophobic force describes the attraction between water-hating molecules (and surfaces) that draws them together, causing aggregation, phase separation, protein folding and many other inherent physical phenomena.
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Affiliation(s)
- Rico F. Tabor
- School of Chemistry
- Monash University
- Clayton, Australia
| | - Franz Grieser
- Particulate Fluids Processing Centre
- The University of Melbourne
- Parkville 3010, Australia
- School of Chemistry
- The University of Melbourne
| | - Raymond R. Dagastine
- Particulate Fluids Processing Centre
- The University of Melbourne
- Parkville 3010, Australia
- Department of Chemical and Biomolecular Engineering
- The University of Melbourne
| | - Derek Y. C. Chan
- Particulate Fluids Processing Centre
- The University of Melbourne
- Parkville 3010, Australia
- Department of Mathematics and Statistics
- The University of Melbourne
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