Article
Chemistry, Multidisciplinary
Youhua Jiang, Zhijia Xu, Bin Li, Juan Li, Dongshi Guan
Summary: This study reveals that the receding contact angles of droplets decrease with the decrease in the pillar spring constant. Surprisingly, densely packed pillar arrays may result in larger receding contact angles than sparsely packed pillars, which is contrary to the understanding of rigid pillar arrays.
Article
Chemistry, Physical
Claudio Nunes Pereira, Guilherme Canete Vebber, Raquel S. Mauler, Otavio Bianchi
Summary: This publication presents the achievement of partial surface tension properties of liquids using an adapted Good-Girifalco approach. The results show that the interfacial tension data of water is suitable for estimating the dispersive component of surface tension, while the interfacial tension of squalene is more accurate for calculating the polar component. The proposed method strengthens the relationship between solubility parameters and surface tension parameter, which is of great importance for the field of Materials Science.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Chemistry, Physical
Laurens Snels, Navid Mostofi Sarkari, Jeroen Soete, Arne Maes, Carlo Antonini, Martine Wevers, Tanmoy Maitra, David Seveno
Summary: Characterizing the microstructure of the ice/surface interface and its impact on icephobic behavior is a significant challenge. X-ray Computed Tomography (XCT) provides unprecedented insights into the internal and interfacial structures of (super)hydrophobic surfaces and ice. By utilizing XCT and other surface analysis techniques, qualitative and quantitative results on the structure of the ice/surface system were obtained, demonstrating the potential of XCT in developing icephobic materials.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Shuai Zhao, Zhao-Hui Zhou, Yang-Nan Shangguan, Lu Han, Li-Li Wang, Wei Fan, Qun Zhang, Lei Zhang, Gui-Yang Ma, Lu Zhang
Summary: This paper investigates the effects of extended surfactant concentration, polypropylene oxide (PO) number, and various counter ions (Na+, Ca2+, and Mg2+) on the oil-water interfacial tension (IFT) of extended surfactant solutions. The results show that as the PO number increases, the space occupied by surfactant molecules on the oil phase side increases, resulting in a tighter surfactant film. Bivalent cations can significantly reduce the IFT, with calcium ions achieving ultralow values at lower PO numbers and a wide range of alkane concentrations. The ability of magnesium ions to reduce the IFT is weaker than that of calcium ions. Additionally, surface-active substances in crude oil competitively adsorb on the interface, leading to an increase in IFT. The addition of calcium or magnesium ions forms a tight adsorption film of surfactant molecules, resulting in an ultralow IFT against crude oil.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Review
Chemistry, Physical
Priyatanu Roy, Shihao Liu, Cari S. Dutcher
Summary: Measurements of droplet phase and interfacial tension are crucial in atmospheric aerosols and emulsion science. Recent advances in microfluidics allow for customized multiphase fluid flows in channels, enabling manipulation and observation of microscale droplets in an enclosed setting without the need for large and expensive control systems. Different physical principles at the microscale and corresponding microfluidic approaches are discussed for measuring droplet phase state, viscosity, and IFT.
ANNUAL REVIEW OF PHYSICAL CHEMISTRY, VOL 72
(2021)
Article
Chemistry, Physical
Nurudeen Yekeen, Ahmed Al-Yaseri, Berihun Mamo Negash, Muhammad Ali, Ausama Giwelli, Lionel Esteban, Joel Sarout
Summary: This study calculated the interfacial tension parameters between clay and gas as well as clay and brine at different temperatures and pressures. The results showed that the interfacial tension between clay and hydrogen gas was higher than that between clay and nitrogen gas or carbon dioxide gas under similar thermodynamic conditions. Additionally, a significant relationship was found between clay/gas interfacial tension and gas density, which could be a useful tool for estimating rock/fluid interfacial tension quickly.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Zoha Dalal Isfehani, Ali Sheidaie, Mirhasan Hosseini, Jalal Fahimpour, Stefan Iglauer, Alireza Keshavarz
Summary: Cushion gas plays a vital role in maintaining stable hydrogen withdrawal by retaining adequate reservoir pressure in hydrogen geological storage. The presence of cushion gas in the storage reservoir can affect the flow characteristics of hydrogen during injection and production cycles. However, there is a lack of literature data on the interfacial tension (IFT) between cushion gas mixed with hydrogen and brine at geo-storage conditions. This study measured the IFT of (brine + H-2 + CO2) system using the pendant drop method, and found that IFT reduced with increasing CO2 percentage, declining pressure, and increasing temperature, while linearly increasing with brine salinity. These findings provide new insights for large-scale hydrogen geological storage projects.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Physical
Lu Han, Huoxin Luan, Jia Ren, Qun Zhang, Chongjun Xu, Gen Li, Hongyan Xiao, Zhaohui Zhou, Lei Zhang, Lu Zhang
Summary: The interfacial tension (IFT) values of sodium dialkyl sulfosuccinates (AOT) mixed with different betaines (alkyl sulphobetaine (ASB) and benzyl substituted alkyl sulphobetaine (BSB)) against n-alkanes and crude oil were determined by the spinning drop method. Molecular dynamics (MD) simulation was used to study the interaction mechanism between AOT and different betaine molecules. The results showed that AOT molecules reached hydrophilic-lipophilic balance and formed a compacted interfacial film at the dodecane-water interface, leading to reduced IFT values.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Multidisciplinary
Glen McHale, Nasser Afify, Steven Armstrong, Gary G. Wells, Rodrigo Ledesma-Aguilar
Summary: Liquid-liquid interfacial tensions can be deduced from the apparent contact angles on SLIPS, providing valuable insight into liquid-liquid interactions and the wetting of a liquid surface by another liquid.
Article
Chemistry, Multidisciplinary
Sameer Mhatre, Sebastien Simon, Johan Sjoblom
Summary: This study presents a novel technique to measure the interfacial dilational rheology of a molecular film adsorbed at a water-oil interface using a direct-current electric field. The analysis involves calculating the dynamic interfacial tension through a specific algorithm, and estimating the surface moduli based on the amplitude and phase difference of the interfacial tension waveform. The results demonstrate that the elasticity of the asphaltene films increases with increasing bulk concentrations and electric field strengths, although the effect is influenced by the combination of these parameters.
Article
Chemistry, Multidisciplinary
Masumeh Foroutan, Morteza Torabi Rad, Ahmad Boudaghi, Hassan Ataeizadeh
Summary: This paper analyzes the shape of two-dimensional and three-dimensional drops on flat and curved substrates by minimizing free energy with the variational approach. The drop shape equation is determined for both flat and curved substrates using analytical and numerical methods. The results show that the three-dimensional drop shape is not a sphere and that the spherical cap approximation is valid only for contact angles far from 90 degrees.
JOURNAL OF THE IRANIAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Qun Zhang, Lu Han, Huoxin Luan, Jia Ren, Chongjun Xu, Gen Li, Hongyan Xiao, Zhaohui Zhou, Lu Zhang
Summary: The synergistic effects of betaines and anionic extended surfactants with self-regulating ability in reducing interfacial tensions (IFTs) have been validated through experiments and molecular dynamics simulation. The IFTs of different combinations of betaines and alkyl polypropylene ether sulfonates (APS) in solutions against decane and crude oil were investigated. The results show that the IFTs decrease with the increase of propylene oxide (PO) numbers in APS surfactants and the determining factor for IFT reduction in the mixed systems is size compatibility. The flexible PO group in APS surfactants enables them to exhibit synergistic effects with different betaines. The findings contribute to the understanding of mixed surfactant solutions in enhanced oil recovery.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Xiang-Long Cui, Yi Pan, Fu-Tang Hu, Lu Han, Xiu-Yu Zhu, Lei Zhang, Zhao-Hui Zhou, Gen Li, Gui-Yang Ma, Lu Zhang
Summary: Betaine is a promising surfactant for high-temperature and high-salinity reservoirs. This study evaluated the interfacial properties of two betaine mixtures and investigated the effects of temperature-resistant, salt-resistant polymers on dynamic interfacial tensions. The results showed that the addition of anionic surfactants improved the solubility of betaine in oil or water, and the addition of water-soluble polymers enhanced the water solubility of betaine solutions. The polymers affected the interfacial tensions by regulating the HLB of the surfactant solutions.
Article
Mathematics, Applied
Michael Vigdorowitsch, Liudmila E. Tsygankova, Valery V. Ostrikov, Lyudmila D. Rodionova
Summary: This study proposes a model that treats the Wenzel and Cassie-Baxter wetting states as linear combinations of basis states. It successfully applies this model to independent data and reproduces the dependence of apparent contact angles on roughness. The analysis of oval-shaped curves reveals that the contact angle is a non-monotonous function of azimuthal angle due to reduced symmetry and varying curvature of the contact line.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2022)
Article
Chemistry, Physical
Joydip Chaudhuri, Dipankar Bandyopadhyay
Summary: The study suggests that coupling the continuum approach with a statistical one can help develop a generic thermodynamic model for analyzing variations of interfacial tension and deformations between fluid interfaces. Numerical experiments show that the effects of field exposure on molecule redistribution and molecular interaction potentials can be correlated to local variations of interfacial tension and deformations. The simulated results accurately predict experimental and theoretical results on interfacial deformation under different fields.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Edward Bormashenko, Irina Legchenkova, Shiri Navon-Venezia, Mark Frenkel, Yelena Bormashenko
Summary: The impact of different plasma treatments on medical grade polyvinylchloride in terms of wettability and chemical composition was studied. Corona plasma treatment significantly enhanced its hydrophilic properties, while oxidation was hardly correlated with hydrophobic recovery, mainly attributable to the bulk mobility of polymer chains.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Multidisciplinary
Edward Bormashenko, Alexander A. Fedorets, Leonid A. Dombrovsky, Michael Nosonovsky
Summary: Viruses self-assemble in water environments through hydrophobic forces, driven by the system's tendency to attain the maximum disordered state, similar to entropic forces in information systems. These interactions also exhibit similarities with self-assembly processes in colloidal crystals, droplet clusters, and liquid marbles on the submicron scale.
Article
Physics, Multidisciplinary
Edward Bormashenko
Summary: This study addresses minimal rotating thermodynamic systems and examines the conditions for recording and erasing information as well as the role of symmetry.
Article
Physics, Multidisciplinary
Edward Bormashenko
Summary: The study explores the temperature-dependent entropic force between a matrix of magnets and direct current, finding that the entropic force acts as repulsion at a large distance and scales with temperature.
Article
Chemistry, Multidisciplinary
Edward Bormashenko, Irina Legchenkova, Mark Frenkel, Nir Shvalb, Shraga Shoval
Summary: In this paper, informational (Shannon) measures of symmetry for patterns built of 1D and 2D shapes are introduced and analyzed. These measures characterize the uncertainty and appearance of symmetry elements in a pattern, are independent of pattern size and shape quantity, and are robust to long-range order. Additionally, the paper discusses the measures' applications in fractal patterns, mixed patterns, time evolution, and chemical reaction analysis.
APPLIED SCIENCES-BASEL
(2022)
Article
Chemistry, Physical
Anfisa Ayalon, Alexander Rubowitz, Pritam Kumar Roy, Shraga Shoval, Irina Legchenkova, Edward Bormashenko
Summary: This paper focuses on the behavior, migration, and distribution of commonly injected ophthalmic drugs in eyes filled with medical-grade silicone oil. The results from in vitro and ex vivo models show that the drugs quickly sink in the silicone oil and spread over the retinal surface, suggesting their effective use in eyes with silicone oil tamponade.
SURFACE INNOVATIONS
(2022)
Review
Physics, Multidisciplinary
Irina Legchenkova, Mark Frenkel, Nir Shvalb, Shraga Shoval, Oleg V. Gendelman, Edward Bormashenko
Summary: This study reports the properties of Voronoi tessellations generated from random 2D distribution points. By applying an iterative procedure, order can be introduced into an initially disordered system. However, the Shannon entropy is not an accurate measure of the level of order in the patterns.
Article
Physics, Multidisciplinary
Edward Bormashenko, Irina Legchenkova, Mark Frenkel, Nir Shvalb, Shraga Shoval
Summary: We used a complete set of convex pentagons to achieve a plane filling without any overlaps or gaps using Voronoi tessellations. The Shannon entropy of the tessellations was calculated and it varied widely. We found that the most abundant Voronoi tessellations are made up of pentagons, hexagons, and heptagons, with pentagons and hexagons being the most common polygons.
Article
Chemistry, Physical
Anton Starostin, Vladimir Strelnikov, Leonid A. Dombrovsky, Shraga Shoval, Oleg Gendelman, Edward Bormashenko
Summary: The freezing of water droplets on bare and superhydrophobic surfaces of polymer wedges was investigated both experimentally and computationally. Numerical calculations revealed that the direction of heat flux from the droplet through the thermal contact region with the wedge differs significantly from the normal to the wedge surface. A new computational model was proposed to account for the variable area of the water freezing front in the droplet, which accurately predicted the faster freezing on bare surface. The experimental results showed that the direction of the freezing cone axis was noticeably different for bare and superhydrophobic wedge surfaces due to the influence of the local heat flux direction.
SURFACE INNOVATIONS
(2023)
Article
Multidisciplinary Sciences
Mark Frenkel, Irina Legchenkova, Nir Shvalb, Shraga Shoval, Edward Bormashenko
Summary: This study reports on Voronoi mosaics inspired by seed points placed on the Archimedes Spirals. Voronoi (Shannon) entropy was calculated for these patterns. Equidistant and non-equidistant patterns were examined. The Voronoi tessellations generated by the seeds located on the Archimedes spiral demonstrated a switch in their chirality with linearly growing radial distance. The study also discusses the aesthetic attraction of the Voronoi mosaics arising from seed points placed on the Archimedes Spirals.
Article
Mathematics
Nir Shvalb, Mark Frenkel, Shraga Shoval, Edward Bormashenko
Summary: In this paper, we use the Ramsey theory to study the geometrical characteristics of closed contours. By examining a set of six points arranged on a closed contour and connected as a complete graph, we find that the curve must contain at least one monochromatic triangle. This finding has practical applications in dynamical billiards. We also discuss Ramsey constructions arising from differential geometry and the applications of the Ramsey theory.
Article
Physics, Multidisciplinary
Mark Frenkel, Shraga Shoval, Edward Bormashenko
Summary: This paper introduces and calculates Shannon entropy for bi-colored Ramsey complete graphs, with up to six vertices. The graphs considered are complete graphs with two types of links, alpha-links and beta-links. The Shannon entropy is introduced to describe the uncertainty of monochromatic polygons in the given complete graph, and it is insensitive to the exact shape of the polygons but sensitive to their distribution. The suggested Shannon entropies, S alpha and S beta, are interpreted as the average uncertainty of finding specific colored polygons in the graph.
Article
Chemistry, Multidisciplinary
Abhishek Kaushal, Shraga Shoval, Bernard P. Binks, Edward Bormashenko
Summary: The impact of liquid marbles coated with different hydrophobic powders on various solid substrates was investigated. The contact time of the bouncing marbles was studied and a scaling behavior of the contact time as a function of Weber number was established. The spreading time and retraction time of the marbles were found to be weakly dependent on the Weber number. The scaling law changed at a threshold Weber number, which was attributed to the breaking of the Leidenfrost regime.
Article
Chemistry, Physical
Pritam Kumar Roy, Shraga Shoval, Nir Shvalb, Leonid A. Dombrovsky, Oleg Gendelman, Edward Bormashenko
Summary: In this paper, the deformation of a paraffin wax droplet during solidification is studied through experiments and numerical simulations. It is found that the droplet's upper surface becomes nearly flat and a dimple is formed in the center, resembling the shape of a fruit. The formation of the dimple is attributed to the presence of the mushy zone between the liquidus and solidus of the paraffin wax. These findings contribute to a better understanding of the deformation mechanism of paraffin wax droplets.
Article
Physics, Fluids & Plasmas
Mark Frenkel, Alexander A. Fedorets, Dmitry V. Shcherbakov, Leonid A. Dombrovsky, Michael Nosonovsky, Edward Bormashenko
Summary: In this study, scaling laws for polymer chains in two-dimensional levitating microdroplet clusters were examined. The results confirmed the predicted power exponent for 2D polymer chains and demonstrated the applicability of the Kramers theorem for branched droplet chains.
