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Kurapati R, Natarajan U. New insights into adsorption structure and hydration of polymer at oil-water interface obtained by molecular dynamics simulations: Isotactic poly(methacrylic acid). POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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2
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Lbadaoui-Darvas M, Idrissi A, Jedlovszky P. Computer Simulation of the Surface of Aqueous Ionic and Surfactant Solutions. J Phys Chem B 2022; 126:751-765. [PMID: 34904437 PMCID: PMC9161821 DOI: 10.1021/acs.jpcb.1c08553] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The surface of aqueous solutions of simple salts was not the main focus of scientific attention for a long while. Considerable interest in studying such systems has only emerged in the past two decades, following the pioneering finding that large halide ions, such as I-, exhibit considerable surface affinity. Since then, a number of issues have been clarified; however, there are still several unresolved points (e.g., the effect of various salts on lateral water diffusion at the surface) in this respect. Computer simulation studies of the field have largely benefited from the appearance of intrinsic surface analysis methods, by which the particles staying right at the boundary of the two phases can be unambiguously identified. Considering complex ions instead of simple ones opens a number of interesting questions, both from the theoretical point of view and from that of the applications. Besides reviewing the state-of-the-art of intrinsic surface analysis methods as well as the most important advances and open questions concerning the surface of simple ionic solutions, we focus on two such systems in this Perspective, namely, the surface of aqueous mixtures of room temperature ionic liquids and that of ionic surfactants. In the case of the former systems, for which computer simulation studies have still scarcely been reported, we summarize the theoretical advances that could trigger such investigations, which might well be of importance also from the point of view of industrial applications. Computer simulation methods are, on the other hand, widely used in studies of the surface of surfactant solutions. Here we review the most important theoretical advances and issues to be addressed and discuss two areas of applications, namely, the inclusion of information gathered from such simulations in large scale atmospheric models and the better understanding of the airborne transmission of viruses, such as SARS-CoV-2.
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Affiliation(s)
- Mária Lbadaoui-Darvas
- Laboratory
of Atmospheric Processes and their Impacts, EPFL, CH-1015 Lausanne, Switzerland
| | - Abdenacer Idrissi
- CNRS,
UMR 8516 -LASIRe - Laboratoire Avancé de Spectroscopie pour
les Interactions la Réactivité et l’environnement, University of Lille, F-5900 Lille, France
| | - Pál Jedlovszky
- Department
of Chemistry, Eszterházy Károly
University, Leányka utca 6, H-3300 Eger, Hungary,
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Lbadaoui-Darvas M, Garberoglio G, Karadima KS, Cordeiro MNDS, Nenes A, Takahama S. Molecular simulations of interfacial systems: challenges, applications and future perspectives. MOLECULAR SIMULATION 2021. [DOI: 10.1080/08927022.2021.1980215] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- Mária Lbadaoui-Darvas
- ENAC/IIE; Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
| | - Giovanni Garberoglio
- European Centre for Theoretical Studies in Nuclear Physics and Related Areas (FBK-ECT*), Trento, Italy
- Trento Institute for Fundamental Physics and Applications (TIFPA-INFN), Trento, Italy
| | - Katerina S. Karadima
- Department of Chemical Engineering, University of Patras, Patras, Greece
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas(FORTH-ICE/HT), Patras, Greece
| | | | - Athanasios Nenes
- ENAC/IIE; Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
- Institute of Chemical Engineering Sciences, Foundation for Research and Technology Hellas(FORTH-ICE/HT), Patras, Greece
| | - Satoshi Takahama
- ENAC/IIE; Swiss Federal Institute of Technology Lausanne (EPFL), Lausanne, Switzerland
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Role of the Counterions in the Surface Tension of Aqueous Surfactant Solutions. A Computer Simulation Study of Alkali Dodecyl Sulfate Systems. COLLOIDS AND INTERFACES 2020. [DOI: 10.3390/colloids4020015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
We have investigated the surface tension contributions of the counterions, surfactant headgroups and tails, and water molecules in aqueous alkali dodecyl sulfate (DS) solutions close to the saturated surface concentration by analyzing the lateral pressure profile contribution of these components using molecular dynamics simulations. For this purpose, we have used the combination of two popular force fields, namely KBFF for the counterions and GROMOS96 for the surfactant, which are both parameterized for the SPC/E water model. Except for the system containing Na+ counterions, the surface tension of the surfactant solutions has turned out to be larger rather than smaller than that of neat water, showing a severe shortcoming of the combination of the two force fields. We have traced back this failure of the potential model combination to the unphysically strong attraction of the KBFF counterions, except for Na+, to the anionic head of the surfactants. Despite this failure of the model, we have observed a clear relation between the soft/hard character (in the sense of the Hofmeister series) and the surface tension contribution of the counterions, which, given the above limitations of the model, can only be regarded as an indicative result. We emphasize that the obtained results, although in a twisted way, clearly stress the crucial role the counterions of ionic surfactants play in determining the surface tension of the aqueous surfactant solutions.
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Horváth RA, Fábián B, Szőri M, Jedlovszky P. Investigation of the liquid-vapour interface of aqueous methylamine solutions by computer simulation methods. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.110978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Sousa SF, Peres J, Coelho M, Vieira TF. Analyzing PEGylation through Molecular Dynamics Simulations. ChemistrySelect 2018. [DOI: 10.1002/slct.201800855] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Sérgio F. Sousa
- UCIBIO@REQUIMTE; BioSIM; Departamento de Biomedicina; Faculdade de Medicina da Universidade do Porto, Alameda Professor Hernâni Monteiro; 4200-319, Porto Portugal
| | - Joana Peres
- LEPABE; Faculdade de Engenharia; Universidade do Porto, Porto; Portugal
| | - Manuel Coelho
- LEPABE; Faculdade de Engenharia; Universidade do Porto, Porto; Portugal
| | - Tatiana F. Vieira
- LEPABE; Faculdade de Engenharia; Universidade do Porto, Porto; Portugal
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Ta TD, Tieu AK, Zhu H, Zhu Q, Kosasih PB, Zhang J, Deng G. Tribological Behavior of Aqueous Copolymer Lubricant in Mixed Lubrication Regime. ACS APPLIED MATERIALS & INTERFACES 2016; 8:5641-5652. [PMID: 26828119 DOI: 10.1021/acsami.5b10905] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Although a number of experiments have been attempted to investigate the lubrication of aqueous copolymer lubricant, which is applied widely in metalworking operations, a comprehensive theoretical investigation at atomistic level is still lacking. This study addresses the influence of loading pressure and copolymer concentration on the structural properties and tribological performance of aqueous copolymer solution of poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEO-PPO) at mixed lubrication using a molecular dynamic (MD) simulation. An effective interfacial potential, which has been derived from density functional theory (DFT) calculations, was employed for the interactions between the fluid's molecules and iron surface. The simulation results have indicated that the triblock copolymer is physisorption on iron surface. Under confinement by iron surfaces, the copolymer molecules form lamellar structure in aqueous solution and behave differently from its bulk state. The lubrication performance of aqueous copolymer lubricant increases with concentration, but the friction reduction is insignificant at high loading pressure. Additionally, the plastic deformation of asperity is dependent on both copolymer concentration and loading pressure, and the wear behavior shows a linear dependence of friction force on the number of transferred atoms between contacting asperities.
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Affiliation(s)
- Thi D Ta
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - A Kiet Tieu
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Hongtao Zhu
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Qiang Zhu
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Prabouno B Kosasih
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Jie Zhang
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
| | - Guanyu Deng
- School of Mechanical, Materials and Mechatronic Engineering, Faculty of Engineering and Information Sciences (EIS), University of Wollongong , Northfield Avenue, Wollongong, New South Wales 2522, Australia
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Yin Q, Zhang L, Jiang B, Yin Q, Du K. Effect of water in amorphous polyvinyl formal: insights from molecular dynamics simulation. J Mol Model 2015; 21:2. [DOI: 10.1007/s00894-014-2551-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 11/30/2014] [Indexed: 11/24/2022]
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Reprint of “Role of the fluidity of a liquid phase in determining the surface properties of the opposite phase”. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2013.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Role of the fluidity of a liquid phase in determining the surface properties of the opposite phase at the liquid–liquid interface. J Mol Liq 2013. [DOI: 10.1016/j.molliq.2013.04.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abrankó-Rideg N, Darvas M, Horvai G, Jedlovszky P. Immersion Depth of Surfactants at the Free Water Surface: A Computer Simulation and ITIM Analysis Study. J Phys Chem B 2013; 117:8733-46. [DOI: 10.1021/jp401749r] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Nóra Abrankó-Rideg
- Laboratory of Interfaces and
Nanosize Systems, Institute of Chemistry, Eötvös Loránd University, Pázmány P. Stny
1/A, H-1117 Budapest, Hungary
| | - Mária Darvas
- SISSA, Department of Biological and Statistical
Physics, 265 via Bonomea,
I-34136 Trieste, Italy
| | - George Horvai
- MTA-BME Research Group of Technical Analytical Chemistry, Szt. Gellért
tér 4, H-1111 Budapest, Hungary
- Department of Inorganic and
Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, H-1111
Budapest, Hungary
| | - Pál Jedlovszky
- Laboratory of Interfaces and
Nanosize Systems, Institute of Chemistry, Eötvös Loránd University, Pázmány P. Stny
1/A, H-1117 Budapest, Hungary
- MTA-BME Research Group of Technical Analytical Chemistry, Szt. Gellért
tér 4, H-1111 Budapest, Hungary
- EKF Department of Chemistry, Leányka u. 6, H-3300 Eger, Hungary
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Prasitnok K, Wilson MR. A coarse-grained model for polyethylene glycol in bulk water and at a water/air interface. Phys Chem Chem Phys 2013; 15:17093-104. [DOI: 10.1039/c3cp52958d] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Angus-Smyth A, Campbell RA, Bain CD. Dynamic adsorption of weakly interacting polymer/surfactant mixtures at the air/water interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:12479-92. [PMID: 22746543 DOI: 10.1021/la301297s] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The dynamic adsorption of polymer/surfactant mixtures containing poly(ethylene oxide) (PEO) with either tetradecyltrimethylammonium bromide (C(14)TAB) or sodium dodecyl sulfate (SDS) has been studied at the expanding air/water interface created by an overflowing cylinder, which has a surface age of 0.1-1 s. The composition of the adsorption layer is obtained by a new approach that co-models data obtained from ellipsometry and only one isotopic contrast from neutron reflectometry (NR) without the need for any deuterated polymer. The precision and accuracy of the polymer surface excess obtained matches the levels achieved from NR measurements of different isotopic contrasts involving deuterated polymer, and requires much less neutron beamtime. The PEO concentration was fixed at 100 ppm and the electrolyte concentration at 0.1 M while the surfactant concentration was varied over three orders of magnitude. For both systems, at low bulk surfactant concentrations, adsorption of the polymer is diffusion-controlled while surfactant adsorption is under mixed kinetic/diffusion control. Adsorption of PEO is inhibited once the surfactant coverage exceeds 2 μmol m(-2). For PEO/C(14)TAB, polymer adsorption drops abruptly to zero over a narrow range of surfactant concentration. For PEO/SDS, inhibition of polymer adsorption is much more gradual, and a small amount remains adsorbed even at bulk surfactant concentrations above the cmc. The difference in behavior of the two mixtures is ascribed to favorable interactions between the PEO and SDS in the bulk solution and at the surface.
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Lísal M, Posel Z, Izák P. Air–liquid interfaces of imidazolium-based [TF2N−] ionic liquids: insight from molecular dynamics simulations. Phys Chem Chem Phys 2012; 14:5164-77. [DOI: 10.1039/c2cp23572b] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Darvas M, Gilányi T, Jedlovszky P. Competitive Adsorption of Surfactants and Polymers at the Free Water Surface. A Computer Simulation Study of the Sodium Dodecyl Sulfate−Poly(ethylene oxide) System. J Phys Chem B 2011; 115:933-44. [DOI: 10.1021/jp110270c] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mária Darvas
- Laboratory of Interfaces and Nanosize Systems, Institute of Chemistry, Eötvös Loránd University, Pázmány P. Stny 1/A, H-1117 Budapest, Hungary
- Institut UTINAM—UMR CNRS 6213, Faculté des Sciences, Université de Franche-Comté, F-25030 Besançon Cedex, France
| | - Tibor Gilányi
- Laboratory of Interfaces and Nanosize Systems, Institute of Chemistry, Eötvös Loránd University, Pázmány P. Stny 1/A, H-1117 Budapest, Hungary
| | - Pál Jedlovszky
- Laboratory of Interfaces and Nanosize Systems, Institute of Chemistry, Eötvös Loránd University, Pázmány P. Stny 1/A, H-1117 Budapest, Hungary
- HAS Research Group of Technical Analytical Chemistry, Szt. Gellért tér 4, H-1111 Budapest, Hungary
- EKF Department of Chemistry, Leányka utca 6, H-3300 Eger, Hungary
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