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Brigodiot C, Marsiglia M, Dalmazzone C, Schroën K, Colin A. Studying surfactant mass transport through dynamic interfacial tension measurements: A review of the models, experiments, and the contribution of microfluidics. Adv Colloid Interface Sci 2024; 331:103239. [PMID: 38936181 DOI: 10.1016/j.cis.2024.103239] [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: 01/08/2024] [Revised: 06/14/2024] [Accepted: 06/14/2024] [Indexed: 06/29/2024]
Abstract
Surfactant mass transport towards an interface plays a critical role during formation of emulsions, foams and in industrial processes where two immiscible phases coexist. The understanding of these mechanisms as experimentally observed by dynamic interfacial tension measurements, is crucial. In this review, theoretical models describing both equilibrated systems and surfactant kinetics are covered. Experimental results from the literature are analysed based on the nature of surfactants and the tensiometry methods used. The innovative microfluidic techniques that have become available to study both diffusion and adsorption mechanisms during surfactant mass transport are discussed and compared with classical methods. This review focuses on surfactant transport during formation of droplets or bubbles; stabilisation of dispersed systems is not discussed here.
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Affiliation(s)
- Camille Brigodiot
- IFP Energies nouvelles (IFPEN), 1-4 avenue de Bois-Préau, 92852 Rueil-Malmaison Cedex, France
| | - Marie Marsiglia
- IFP Energies nouvelles (IFPEN), 1-4 avenue de Bois-Préau, 92852 Rueil-Malmaison Cedex, France.
| | - Christine Dalmazzone
- IFP Energies nouvelles (IFPEN), 1-4 avenue de Bois-Préau, 92852 Rueil-Malmaison Cedex, France
| | - Karin Schroën
- Wageningen University and Research (WUR), Wageningen, the Netherlands
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2
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Yang S, Kumar S, Dutcher CS. Rupture of thin liquid trilayer films with soluble surfactants: fundamentals and applications to droplet coalescence. SOFT MATTER 2024; 20:4972-4987. [PMID: 38874504 DOI: 10.1039/d4sm00562g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
Understanding the stability of thin liquid trilayer films is of direct relevance to applications such as multilayer coatings and polymer processing. The stability of trilayer films can also be used to provide insights into emulsion dynamics, such as the rupture of the thin film formed between two droplets during coalescence. Often, emulsions are laden with surfactants and other additives, which can be present in one or both phases as well as at the interfaces between the liquids. In experimental studies, complicating factors such as variations in droplet sizes, curvatures, and collision processes make it difficult to specifically isolate the influence of surfactant transport on droplet coalescence and film rupture. The present work addresses this issue by systematic consideration of a model problem involving a thin liquid trilayer film. Surfactant is soluble in either the outer layers or the inner layer, corresponding to surfactant soluble in the droplets or the continuous phase. Rupture of the inner layer is driven by van der Waals forces. Lubrication theory is applied to derive coupled nonlinear evolution equations describing the perturbations to the interface positions and the surfactant concentrations. Our findings reveal that surfactant better stabilizes the film when soluble in the inner layer, and the stabilizing effect is more pronounced when the outer layers are thicker. These findings are consistent with experimental observations involving emulsions, where emulsions tend to be more stable when surfactant is in the continuous phase rather than in the droplets, with the distinction being more pronounced when droplets are larger.
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Affiliation(s)
- Shu Yang
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
| | - Satish Kumar
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
| | - Cari S Dutcher
- Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA.
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3
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Ma J, Haider OM, Chang CC, Grzesiak KA, Squires TM, Walker LM. Solvent Quality and Aggregation State of Asphaltenes on Interfacial Mechanics and Jamming Behavior at the Oil/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:15238-15248. [PMID: 37862270 PMCID: PMC10620990 DOI: 10.1021/acs.langmuir.3c01890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 10/02/2023] [Indexed: 10/22/2023]
Abstract
The formation of highly stable water-in-oil emulsions results in complications in both upstream and downstream processing. Emulsion stability in these systems has been connected to the adsorption of surface-active asphaltenes that are assumed to form a rigidified film at the oil/water (o/w) interface. Full characterization of this behavior is needed to allow for engineered solutions for enhanced oil recovery. Interfacial properties, such as surface pressure and interfacial elasticity, are implicated in the stabilizing mechanism for these observed films. Asphaltenes are known to be interfacially active in both good solvents (aromatics) and poor solvents (high ratio of aliphatic to aromatic). However, due to inherent complexities present in asphaltene studies, the details of the mechanical properties of the interface remain poorly understood. Despite the widely accepted perception that asphaltenes form persistent rigid films at fluid-fluid interfaces, the connection between bulk solution properties and interfacial mechanics has not been resolved. Here, the effects of solvent quality on the interfacial properties of asphaltene dispersions are determined by using a well-defined asphaltene/solvent system. Interfacial rigidity is observed only under poor solvent conditions, while the good solvent system remains fluid-like. The interfacial rheology under good and poor solvent conditions is measured simultaneously with surface pressure measurements to track interfacial development. It is shown that surface pressure and dilatational modulus measurements are not indicators of whether an interface demonstrates rigid behavior under large compressions. Finally, conditions required for asphaltene-coated interfaces to exhibit the mechanical behavior associated with a rigidified interface are defined. This work provides a framework for quantifying the impact of the aggregation state of asphaltenes on the stability and mechanics at the o/w interface.
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Affiliation(s)
- Junchi Ma
- Department
of Chemical Engineering, Carnegie Mellon
University, Pittsburgh, Pennsylvania 15213, United States
| | - Olivia M. Haider
- Department
of Chemical Engineering, Carnegie Mellon
University, Pittsburgh, Pennsylvania 15213, United States
| | - Chih-Cheng Chang
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | | | - Todd M. Squires
- Department
of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Lynn M. Walker
- Department
of Chemical Engineering, Carnegie Mellon
University, Pittsburgh, Pennsylvania 15213, United States
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Barakat JM, Squires TM. Curvature and shape relaxation in surface-viscous domains. PHYSICAL REVIEW FLUIDS 2023; 8:054001. [PMID: 38855576 PMCID: PMC11160971 DOI: 10.1103/physrevfluids.8.054001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
The mechanics of curved, heterogeneous, surfactant-laden surfaces and interfaces are important to a variety of engineering and biological applications. To date, most models of rheologically complex interfaces have focused on homogeneous systems of planar or fixed curvature. In this study, we investigate a simple, dynamical model of a two-phase surface fluid on a curved interface: a condensed, surface-viscous domain embedded within a surface-inviscid, spherical interface of time-varying radius of curvature. Our aim is to understand how changes in surface curvature generate two-dimensional Stokes flows inside the domain, thereby resisting curvature deformation and distorting the domain shape. We model the surface stress within the domain using the classical Boussinesq-Scriven constitutive equation, simplified for a near-spherical cap undergoing a small-amplitude curvature deformation. We then analyze the frequency-dependent dynamics of the surface stress and curvature within the domain when the pressure difference across the surface is sinusoidally oscillated. We find that the curvature relaxes diffusively, and thus define a Peclet number (Pe) relating the rate of diffusion to the oscillation frequency. At small enough Pe, the surface deforms quasi-statically, whereas at high Pe, the curvature varies sharply within a thin boundary layer adjacent to the domain border. Consequently, the curvature of the domain appears discontinuous from the rest of the surface under rapid oscillation. We then examine the linear stability of the domain shape to small, non-axisymmetric perturbations when the surface is steadily compressed (i.e., the pressure difference across it is increased). While the line tension at the domain border tends to maintain circular symmetry, surface-viscous stresses generated by surface compression tend to destabilize the perimeter. A shape instability arises above a critical surface capillary number (Ca) relating surface-viscous stresses to line tension. Moreover, we show that the mechanism of instability is distinct from that of the famous Saffman-Taylor fingering instability. Various extensions of our model are discussed, including materials with finite dilatational surface viscosity, linear and nonlinear (visco)elasticity, and large-amplitude deformations.
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Affiliation(s)
- Joseph M. Barakat
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106
| | - Todd M. Squires
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, CA 93106
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Shen Q, Zheng W, Han F, Dai J, Song R, Li J, Li Y, Li B, Chen Y. Quantitative analysis and interfacial properties of mixed pea protein isolate-phospholipid adsorption layer. Int J Biol Macromol 2023; 232:123487. [PMID: 36736980 DOI: 10.1016/j.ijbiomac.2023.123487] [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: 10/25/2022] [Revised: 01/23/2023] [Accepted: 01/26/2023] [Indexed: 02/04/2023]
Abstract
Proteins and low-molecular-weight (LMW) surfactants are widely used for the physical stabilization of many emulsion-based food products. This study investigated the oil-water interfacial behavior between pea protein isolate (PPI) and phospholipid (PL). The emulsions prepared with different concentrations of PPI and PL were stabilized by their synergetic or competitive adsorption at the oil-water interface. In addition, the quantitative proteomics results could illustrate the displacements of proteins by PL. The result showed that the vicilin (7S) could be preferentially displaced by PL. Meanwhile, the results of quartz crystal microbalance with dissipation (QCM-D) indicated the high affinity of legumin (11S) with PL, suggesting that the legumin possessed higher interfacial affinity to prevent interfacial displacement. This research could help us to understand the interaction and competitive adsorption between plant proteins and LMW surfactants profoundly, which could promote the development of plant protein-based emulsion beverage with improved stability.
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Affiliation(s)
- Qian Shen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wei Zheng
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Fei Han
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jun Dai
- Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering, Hubei University of Technology, Wuhan 430068, China
| | - Rong Song
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jing Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yan Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Bin Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Yijie Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Shenzhen Institute of Nutrition and Health, Huazhong Agricultural University, Wuhan 430070, China; Genome Analysis Laboratory of the Ministry of Agriculture, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, Shenzhen 518124, China.
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6
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Li B, Ju M, Dou X, Li N, Zhang W, Sun Z, Yu K, Wang J, Wang Z. Assessing nanoparticle-surfactant-salt synergistic effects on droplet–droplet electrocoalescence by molecular dynamics simulations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Jose M, Lokesh M, Vaippully R, Satapathy DK, Roy B. Temporal evolution of viscoelasticity of soft colloid laden air-water interface: a multiple mode microrheology study. RSC Adv 2022; 12:12988-12996. [PMID: 35497011 PMCID: PMC9049755 DOI: 10.1039/d2ra00765g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 04/19/2022] [Indexed: 12/17/2022] Open
Abstract
Mechanical properties of particle laden interfaces is crucial for various applications. For water droplets containing soft microgel particles, passive microrheology studies have revealed that the dynamically varying surface area of the evaporating drop results in a viscous to viscoelastic transition along the plane of the interface. However, the behaviour of the medium orthogonal to the interface has been elusive to study using passive microrheology techniques. In this work, we employ optical tweezers and birefringent probe particles to extract the direction-resolved viscoelastic properties of the particle-laden interface. By using special types of birefringent tracer particles, we detect not only the in-plane translational mode but also the out-of-plane translational (perpendicular to the interface) and rotational modes. We first compare different passive methods of probing the viscoelasticity of the microgel laden interface of sessile drop and then study the modes perpendicular to the interface and the out-of-plane rotational mode using optical tweezers based passive microrheology. The viscoelasticity of the interface using two different methods, i.e., multiple-particle tracking passive microrheology using video microscopy and by trapping birefringent tracer particles in optical tweezers, relying on different models are studied and found to exhibit comparable trends. Interestingly, the mode orthogonal to the interface and the rotational mode also show the viscous to viscoelastic transition as the droplet evaporates, but with lesser viscoelasticity during the same evaporation time than the in-plane mode.
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Affiliation(s)
- Merin Jose
- Department of Physics, Indian Institute of Technology Madras Chennai Tamil Nadu India 600036
| | - Muruga Lokesh
- Department of Physics, Indian Institute of Technology Madras Chennai Tamil Nadu India 600036
| | - Rahul Vaippully
- Department of Physics, Indian Institute of Technology Madras Chennai Tamil Nadu India 600036
| | - Dillip K Satapathy
- Department of Physics, Indian Institute of Technology Madras Chennai Tamil Nadu India 600036
| | - Basudev Roy
- Department of Physics, Indian Institute of Technology Madras Chennai Tamil Nadu India 600036
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8
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Tseng WC, Tsay RY, Le TTY, Hussain S, Noskov BA, Akentiev A, Yeh HH, Lin SY. Evaluation of the dilational modulus of protein films by pendant bubble tensiometry. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.118113] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Farsad A, Lawson S, Rezaei F, Rownaghi AA. Oxidative dehydrogenation of propane over 3D printed mixed metal oxides/H-ZSM-5 monolithic catalysts using CO2 as an oxidant. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.10.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Narayan S, Barman S, Moravec DB, Hauser BG, Dallas AJ, Zasadzinski JA, Dutcher CS. Dilatational rheology of water-in-diesel fuel interfaces: effect of surfactant concentration and bulk-to-interface exchange. SOFT MATTER 2021; 17:4751-4765. [PMID: 33861293 PMCID: PMC8140520 DOI: 10.1039/d1sm00064k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Micrometer-sized water droplets dispersed in diesel fuel are stabilized by the fuel's surface-active additives, such as mono-olein and poly(isobutylene)succinimide (PIBSI), making the droplets challenging for coalescing filters to separate. Dynamic material properties found from interfacial rheology are known to influence the behavior of microscale droplets in coalescing filters. In this work, we study the interfacial dilatational properties of water-in-fuel interfaces laden with mono-olein and PIBSI, with a fuel phase of clay-treated ultra-low sulphur diesel (CT ULSD). First, the dynamic interfacial tension (IFT) is measured using pendant drop tensiometry, and a curvature-dependent form of the Ward and Tordai diffusion equation is applied for extracting the diffusivity of the surfactants. Additionally, Langmuir kinetics are applied to the dynamic IFT results to obtain the maximum surface concentration (Γ∞) and ratio of adsorption to desorption rate constants (κ). We then use a capillary pressure microtensiometer to measure the interfacial dilatational modulus, and further extract the characteristic frequency of surfactant exchange (ω0) by fitting a model assuming diffusive exchange between the interface and bulk. In this measurement, 50-100 μm diameter water droplets are pinned at the tip of a glass capillary in contact with the surfactant-containing fuel phase, and small amplitude capillary pressure oscillations over a range of frequencies from 0.45-20 rad s-1 are applied to the interface, inducing changes in interfacial tension and area to yield the dilatational modulus, E*(ω). Over the range of concentrations studied, the dilatational modulus of CT ULSD with either mono-olein or PIBSI increases with a decrease in bulk concentration and plateaus at the lowest concentrations of mono-olein. Characteristic frequency (ω0) values extracted from the fit are compared with those calculated using equilibrium surfactant parameters (κ and Γ∞) derived from pendant drop tensiometry, and good agreement is found between these values. Importantly, the results imply that diffusive exchange models based on the equilibrium relationships between surfactant concentration and interfacial tension can be used to infer the dynamic dilatational behavior of complex surfactant systems, such as the water-in-diesel fuel interfaces in this study.
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Affiliation(s)
- Shweta Narayan
- Department of Mechanical Engineering, University of Minnesota - Twin Cities, Minneapolis, MN, USA.
| | - Sourav Barman
- Department of Chemical Engineering and Materials Science, University of Minnesota - Twin Cities, Minneapolis, MN, USA
| | | | | | | | - Joseph A Zasadzinski
- Department of Chemical Engineering and Materials Science, University of Minnesota - Twin Cities, Minneapolis, MN, USA
| | - Cari S Dutcher
- Department of Mechanical Engineering, University of Minnesota - Twin Cities, Minneapolis, MN, USA. and Department of Chemical Engineering and Materials Science, University of Minnesota - Twin Cities, Minneapolis, MN, USA
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11
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First Approach to Measure Interfacial Rheology at High-Pressure Conditions by the Oscillating Drop Technique. COLLOIDS AND INTERFACES 2021. [DOI: 10.3390/colloids5020023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
An oscillating drop rheometer capable of operating under conditions of high pressure and high temperature has been built. The oscillating drop mechanism was able to support pressures as high as 1300 bar and successfully performed oscillations at constant pressure. Apparent elastic and viscous complex moduli were measured for a system of CO2 and synthetic seawater containing 100 ppm of a linear alkyl ethoxylate surfactant for different pressures and temperatures. The moduli had strong dependencies on both pressure and temperature. At temperatures of 40 and 80 °C, the apparent elastic modulus passed through a maximum for pressures between 100 and 300 bar. The harmonic distortion of the oscillations was calculated for all measurements, and it was found that drop oscillations below ca. 2.6 µL caused distortions above 10% due to a mechanical backlash of the motor.
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12
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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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Simon S, Ruwoldt J, Sjöblom J. A critical update of experimental techniques of bulk and interfacial components for fluid characterization with relevance to well fluid processing and transport. Adv Colloid Interface Sci 2020; 277:102120. [PMID: 32062168 DOI: 10.1016/j.cis.2020.102120] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 01/30/2020] [Accepted: 02/02/2020] [Indexed: 11/20/2022]
Abstract
The present article reviews techniques to address central flow assurance and separation issues. It is our purpose to update the need for extended information in order to draw adequate conclusions about the reason for irregularities in production and how this is related to individual components or fractions in the crude oil. Our intention is to show that the mass related analysis (such as SARA, MS etc.) are insufficient for a validation of the early stage predictions concerning irregularities. The review introduces a set of new characterization and fractionation techniques such as interfacial rheology, SANS, and NMR, where the central theme is the functionality of the components and not just their mass. Two crude oil-related issues are addressed: Wax precipitation and deposition, and crude oil/water resolution. First, bulk techniques to characterize wax precipitation are reviewed. The influence of the chemistry of other crude oil components (asphaltenes) and wax inhibitor on the precipitation is highlighted. Secondly, in aqueous systems, interfacial w/o conditions are important for the stability of dispersed systems. Asphaltenes have a crucial and important role in the stability of crude oil emulsions. Here special attention is directed to properties like interfacial viscosity and elasticity as well as the adsorbed layer structure determination. Small molecular changes in these properties will have dramatic influence on the stability of the heterogeneous systems. A good example is inhibitor functionality.
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Affiliation(s)
- Sébastien Simon
- Ugelstad Laboratory, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Jost Ruwoldt
- Ugelstad Laboratory, Norwegian University of Science and Technology, 7491 Trondheim, Norway
| | - Johan Sjöblom
- Ugelstad Laboratory, Norwegian University of Science and Technology, 7491 Trondheim, Norway
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14
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Davidson ML, Walker LM. Interfacial Properties of Polyelectrolyte-Surfactant Aggregates at Air/Water Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:12906-12913. [PMID: 30274519 DOI: 10.1021/acs.langmuir.8b02438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The transport, equilibrium properties, and mechanics of stable, rodlike surfactant-polyelectrolyte aggregates, poly(cetyltrimethylammonium vinyl benzoate) or pCTVB, are characterized at air/water interfaces for bulk concentrations near and below the critical aggregation concentration. The surfactant drives the transport to air/water interfaces, while the polyelectrolyte provides elasticity to the coated interfaces and appears to remain adsorbed after the bulk solution is exchanged with water. The processing of interfaces is shown to allow the interfacial tension of the interface to be changed significantly while maintaining a high dilatational elasticity. The results of this work provide a tool to control interfacial properties through design of polyelectrolyte-surfactant complexes.
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Affiliation(s)
- Michael L Davidson
- Department of Chemical Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Lynn M Walker
- Department of Chemical Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
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15
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Accounting for optical errors in microtensiometry. J Colloid Interface Sci 2018; 526:392-399. [DOI: 10.1016/j.jcis.2018.04.053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 04/10/2018] [Accepted: 04/12/2018] [Indexed: 11/19/2022]
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16
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17
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Adsorption and surface dilational visco-elasticity of C n EO m solutions as studied by drop profile analysis tensiometry. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.03.029] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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18
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Zhang X, Kirby SM, Chen Y, Anna SL, Walker LM, Hung FR, Russo PS. Formation and elasticity of membranes of the class II hydrophobin Cerato-ulmin at oil-water interfaces. Colloids Surf B Biointerfaces 2018; 164:98-106. [DOI: 10.1016/j.colsurfb.2018.01.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/29/2017] [Accepted: 01/15/2018] [Indexed: 01/10/2023]
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19
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Kravanja G, Škerget M, Knez Ž, Knez Hrnčič M. Diffusion coefficients of water and propylene glycol in supercritical CO2 from pendant drop tensiometry. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.09.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Interfacial curvature effects on the monolayer morphology and dynamics of a clinical lung surfactant. Proc Natl Acad Sci U S A 2017; 115:E134-E143. [PMID: 29279405 DOI: 10.1073/pnas.1715830115] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The morphology of surfactant monolayers is typically studied on the planar surface of a Langmuir trough, even though most physiological interfaces are curved at the micrometer scale. Here, we show that, as the radius of a clinical lung surfactant monolayer-covered bubble decreases to ∼100 µm, the monolayer morphology changes from dispersed circular liquid-condensed (LC) domains in a continuous liquid-expanded (LE) matrix to a continuous LC linear mesh separating discontinuous LE domains. The curvature-associated morphological transition cannot be readily explained by current liquid crystal theories based on isotropic domains. It is likely due to the anisotropic bending energy of the LC phase of the saturated phospholipids that are common to all natural and clinical lung surfactants. This continuous LC linear mesh morphology is also present on bilayer vesicles in solution. Surfactant adsorption and the dilatational modulus are also strongly influenced by the changes in morphology induced by interfacial curvature. The changes in morphology and dynamics may have physiological consequences for lung stability and function as the morphological transition occurs at alveolar dimensions.
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Pepicelli M, Verwijlen T, Tervoort TA, Vermant J. Characterization and modelling of Langmuir interfaces with finite elasticity. SOFT MATTER 2017; 13:5977-5990. [PMID: 28776048 DOI: 10.1039/c7sm01100h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Interfaces differ from bulk materials in many ways, one particular aspect is that they are compressible. Changing the area per molecule or per particle changes the thermodynamic state variables such as surface pressure. Yet, when compressing to high surface pressures, dense packing of the interfacial species induces phase transitions, with highly structured phases, which can display elastic or strongly viscoelastic behaviour. When these are deformed, in addition to the changes in the surface pressure, extra and deviatoric stresses can be induced. The traditional tool to study the phase behaviour of monolayers is a rectangular Langmuir-Pockels trough, but as both the area and shape of the interface are changed upon compression, the interfacial-strain field in this instrument is mixed with a priori unknown amounts of dilatational and shear deformations, making it difficult to separate the rheological and equilibrium thermodynamic effects. In the present work, the design of a radial trough is described, in which the deformation field is simple, purely dilation or compression. The possibility to now independently measure the compressional properties of different strains and the development of an appropriate finite strain constitutive model for elastic interfaces make it possible to interrogate the underlying constitutive behaviour. This is shown here for a strongly elastic, soft glassy polymer monolayer during its initial compression but is easily generalised to many viscoelastic soft matter interfaces.
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Affiliation(s)
- Martina Pepicelli
- ETH Zurich, Department of Materials, Vladimir-Prelog-Weg 5, 8093, Zurich, Switzerland.
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Kairaliyeva T, Aksenenko EV, Mucic N, Makievski AV, Fainerman VB, Miller R. Surface Tension and Adsorption Studies by Drop Profile Analysis Tensiometry. J SURFACTANTS DETERG 2017; 20:1225-1241. [PMID: 29200810 PMCID: PMC5686271 DOI: 10.1007/s11743-017-2016-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/23/2017] [Indexed: 10/25/2022]
Abstract
Surface tension and dilational viscoelasticity of solutions of various surfactants measured with bubble and drop profile analysis tensiometry are discussed. The study also includes experiments on the co-adsorption of surfactant molecules from a solution drop and alkane molecules from saturated alkane vapor phase. Using experimental data for 12 surfactants with different surface activities, it is shown that depletion due to adsorption of surfactant from the drop bulk can be significant. An algorithm is proposed quantitatively to take into consideration the depletion effect which is required for a correct description of the co-adsorption of alkanes on the solution drop surface and the correct analysis of experimental dynamic surface tension data to determine the adsorption mechanism. Bubble and drop profile analysis tensiometry is also the method of choice for measuring the dilational viscoelasticity of the adsorbed interfacial layer. The same elasticity moduli are obtained with the bubble and drop method only when the equilibrium surface pressures are sufficiently small (Π < 15 mN m-1). When the surface pressure for a surfactant solution is larger than this value, the viscoelasticity moduli determined from drop profile experiments become significantly larger than those obtained from bubble profile measurements.
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Affiliation(s)
- T. Kairaliyeva
- Max-Planck-Institut für Kolloid-und Grenzflächenforschung, Potsdam, Germany
| | - E. V. Aksenenko
- Institute of Colloid Chemistry and Chemistry of Water, Kyiv (Kiev), Ukraine
| | - N. Mucic
- Faculty of Technology, University of Novi Sad, Novi Sad, Serbia
| | | | | | - Reinhard Miller
- Max-Planck-Institut für Kolloid-und Grenzflächenforschung, Potsdam, Germany
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23
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Huang C, Cui M, Sun Z, Liu F, Helms BA, Russell TP. Self-Regulated Nanoparticle Assembly at Liquid/Liquid Interfaces: A Route to Adaptive Structuring of Liquids. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7994-8001. [PMID: 28718650 DOI: 10.1021/acs.langmuir.7b01685] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The controlled structuring of liquids into arbitrary shapes can be achieved in biphasic liquid media using the interfacial assemblies of nanoparticle surfactants (NP-surfactants), that consist of a polar nanoparticle "head group" bound to one or more hydrophobic polymer "tails". The nonequilibrium shapes of the suspended liquid phase can be rendered permanent by the jamming of the NP-surfactants formed and assembled at the interface between the liquids as the system attempts to minimize the interfacial area between the liquids. While critical to the structuring process, little is known of the dynamic mechanical properties of the NP-surfactant monolayer at the interface as it is dictated by the characteristics of the component, including NP size and concentration and the molecular weight and concentration of polymers bound to the NPs. Here we provide the first comprehensive understanding of the dynamic mechanical character of two-dimensional NP-surfactant assemblies at liquid/liquid interfaces. Our results indicate that the dynamics of NP-polymer interactions are self-regulated across multiple time scales and are associated with specific mesoscale interactions between self-similar and cross-complementary components. Furthermore, the mechanical properties of the NP-surfactant monolayer are tunable over a broad range and deterministic on the basis of those component inputs. This control is key to tailoring the functional attributes of the reconfigurable structured liquids to suit specific applications.
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Affiliation(s)
- Caili Huang
- Polymer Science and Engineering Department, University of Massachusetts , 120 Governors Drive, Conte Center for Polymer Research, Amherst, Massachusetts 01003, United States
| | - Mengmeng Cui
- Polymer Science and Engineering Department, University of Massachusetts , 120 Governors Drive, Conte Center for Polymer Research, Amherst, Massachusetts 01003, United States
| | - Zhiwei Sun
- Polymer Science and Engineering Department, University of Massachusetts , 120 Governors Drive, Conte Center for Polymer Research, Amherst, Massachusetts 01003, United States
| | | | | | - Thomas P Russell
- Polymer Science and Engineering Department, University of Massachusetts , 120 Governors Drive, Conte Center for Polymer Research, Amherst, Massachusetts 01003, United States
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology , Beijing 100029, China
- WPI-Advanced Institute for Materials Research (WPI-AIMR), Tohoku University , 2-1-1 Katahira, Aoba, Sendai 980-8577, Japan
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24
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Subramanian S, Simon S, Sjöblom J. Interfacial dilational rheology properties of films formed at the oil/water interface by reaction between tetrameric acid and calcium ion. J DISPER SCI TECHNOL 2017. [DOI: 10.1080/01932691.2016.1224718] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Sreedhar Subramanian
- Ugelstad Laboratory, Department of Chemical Engineering, The Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Sébastien Simon
- Ugelstad Laboratory, Department of Chemical Engineering, The Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Johan Sjöblom
- Ugelstad Laboratory, Department of Chemical Engineering, The Norwegian University of Science and Technology (NTNU), Trondheim, Norway
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25
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Interfacial Dynamic Properties and Dilational Rheology of Sulfonate Gemini Surfactant and its Mixtures with Quaternary Ammonium Bromides at the Air–Water Interface. J SURFACTANTS DETERG 2017. [DOI: 10.1007/s11743-017-1954-8] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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26
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Interfacial dynamic properties and dilational rheology of mixed anionic and cationic Gemini surfactant systems at air–water interface. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.09.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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27
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Fainerman VB, Kovalchuk VI, Aksenenko EV, Miller R. Dilational Viscoelasticity of Adsorption Layers Measured by Drop and Bubble Profile Analysis: Reason for Different Results. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5500-5509. [PMID: 27164467 DOI: 10.1021/acs.langmuir.6b01134] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The dilational viscoelasticity of adsorption layer was measured at different frequencies of drop and bubble surface area oscillations for aqueous C12EO5 solutions. The modulus values obtained by the two experimental protocols are the same for Π < 15 mN/m, while for higher surface pressures the values from drop experiments exceed those from bubble profile analysis. The nature of this phenomenon was studied using stress deformation experiments. At high surfactant concentrations the magnitude of surface tension variations is essentially higher for drops as compared with bubbles, leading to an increased viscoelasticity modulus for oscillating drops. The observed effects are analyzed quantitatively using a diffusion controlled exchange of matter model. The viscoelasticity moduli for a number of surfactants (different CnEOm and Tritons, C13DMPO, and SDS) are reported, and it is shown that the discrepancies between the data obtained by the two methods for many surfactants agree well with the predictions made here.
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Affiliation(s)
| | - V I Kovalchuk
- Institute of Biocolloid Chemistry , Kyiv (Kiev), Ukraine
| | - E V Aksenenko
- Institute of Colloid Chemistry and Chemistry of Water , Kyiv (Kiev), Ukraine
| | - R Miller
- MPI Colloids and Interfaces , Potsdam, Germany
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28
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Kirby SM, Zhang X, Russo PS, Anna SL, Walker LM. Formation of a Rigid Hydrophobin Film and Disruption by an Anionic Surfactant at an Air/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5542-51. [PMID: 27164189 DOI: 10.1021/acs.langmuir.6b00809] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Hydrophobins are amphiphilic proteins produced by fungi. Cerato-ulmin (CU) is a hydrophobin that has been associated with Dutch elm disease. Like other hydrophobins, CU stabilizes air bubbles and oil droplets through the formation of a persistent protein film at the interface. The behavior of hydrophobins at surfaces has raised interest in their potential applications, including use in surface coatings, food foams, and emulsions and as dispersants. The practical use of hydrophobins requires an improved understanding of the interfacial behavior of these proteins, alone and in the presence of added surfactants. In this study, the adsorption behavior of CU at air/water interfaces is characterized by measuring the surface tension and interfacial rheology as a function of adsorption time. CU is found to adsorb irreversibly at air/water interfaces. The magnitude of the dilatational modulus increases with adsorption time and surface pressure until CU eventually forms a rigid film. The persistence of this film is tested through the sequential addition of strong surfactant sodium dodecyl sulfate (SDS) to the bulk liquid adjacent to the interface. SDS is found to coadsorb to interfaces precoated with a CU film. At high concentrations, the addition of SDS significantly decreases the dilatational modulus, indicating disruption and displacement of CU by SDS. Sequential adsorption results in mixed layers with properties not observed in interfaces generated from complexes formed in the bulk. These results lend insight to the complex interfacial interactions between hydrophobins and surfactants.
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Affiliation(s)
| | - Xujun Zhang
- School of Materials Science and Engineering and School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Paul S Russo
- School of Materials Science and Engineering and School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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29
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Pradilla D, Simon S, Sjöblom J, Samaniuk J, Skrzypiec M, Vermant J. Sorption and Interfacial Rheology Study of Model Asphaltene Compounds. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:2900-2911. [PMID: 26949974 DOI: 10.1021/acs.langmuir.6b00195] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The sorption and rheological properties of an acidic polyaromatic compound (C5PeC11), which can be used to further our understanding of the behavior of asphaltenes, are determined experimentally. The results show that C5PeC11 exhibits the type of pH-dependent surface activity and interfacial shear rheology observed in C6-asphaltenes with a decrease in the interfacial tension concomitant with the elastic modulus when the pH increases. Surface pressure-area (Π-A) isotherms show evidence of aggregation behavior and π-π stacking at both the air/water and oil/water interfaces. Similarly, interactions between adsorbed C5PeC11 compounds are evidenced through desorption experiments at the oil/water interface. Contrary to indigenous asphaltenes, adsorption is reversible, but desorption is slower than for noninteracting species. The reversibility enables us to create layers reproducibly, whereas the presence of interactions between the compounds enables us to mimic the key aspects of interfacial activity in asphaltenes. Shear and dilatational rheology show that C5PeC11 forms a predominantly elastic film both at the liquid/air and the liquid/liquid interfaces. Furthermore, a soft glassy rheology model (SGR) fits the data obtained at the liquid/liquid interface. However, it is shown that the effective noise temperature determined from the SGR model for C5PeC11 is higher than for indigenous asphaltenes measured under similar conditions. Finally, from a colloidal and rheological standpoint, the results highlight the importance of adequately addressing the distinction between the material functions and true elasticity extracted from a shear measurement and the apparent elasticity measured in dilatational-pendant drop setups.
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Affiliation(s)
- Diego Pradilla
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU) , NO-7491 Trondheim, Norway
| | - Sébastien Simon
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU) , NO-7491 Trondheim, Norway
| | - Johan Sjöblom
- Ugelstad Laboratory, Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU) , NO-7491 Trondheim, Norway
| | - Joseph Samaniuk
- Soft Materials Laboratory, Department of Materials, ETH Zürich , Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
| | - Marta Skrzypiec
- Institute of Chemical Technology and Engineering, Poznan University of Technology , Berdychowo 4, 60-965 Poznan, Poland
| | - Jan Vermant
- Soft Materials Laboratory, Department of Materials, ETH Zürich , Vladimir-Prelog-Weg 5, 8093 Zürich, Switzerland
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30
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Reichert MD, Walker LM. Coalescence behavior of oil droplets coated in irreversibly-adsorbed surfactant layers. J Colloid Interface Sci 2015; 449:480-7. [DOI: 10.1016/j.jcis.2015.02.032] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 01/05/2023]
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31
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Chernyshev VS, Skliar M. Diffusivity Measurements of Solutes Impacting Interfacial Tension. Ind Eng Chem Res 2015. [DOI: 10.1021/ie504355w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vasiliy S. Chernyshev
- Department
of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
| | - Mikhail Skliar
- Department
of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112, United States
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