1
|
Zhang B, Guan B, Tao Y, Liu W, Peng B, Lv K. Surfactant Synergistic Effect and Interfacial Properties of Microemulsions Compounded with Anionic and Nonionic Surfactants Using Dissipative Particle Dynamics. ACS OMEGA 2024; 9:23903-23916. [PMID: 38854575 PMCID: PMC11154924 DOI: 10.1021/acsomega.4c01933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/08/2024] [Accepted: 05/13/2024] [Indexed: 06/11/2024]
Abstract
Microemulsions are one of the most promising directions in enhanced oil recovery, but conventional screening methods are time-consuming and labor-intensive and lack the means to analyze them at the microscopic level. In this paper, we used the Clint model to predict the changes in the synergistic effect of the mixed system of anionic surfactant sodium dodecyl benzenesulfonate and nonionic surfactant polyethoxylated fatty alcohols (C12E6), generated microemulsions using surfactant systems with different mole fractions, and used particle size to analyze the performance and stability of microemulsions, analyze the properties and stability of microemulsions using particle size, and analyze the interfacial behaviors and changes of microemulsions when different systems constitute microemulsions from the point of view of mesoscopic microemulsion self-assembly behaviors by combining with dissipative particle dynamics. It has been shown that microemulsion systems generated from anionic and nonanionic surfactants with a synergistic effect, based on the Clint model, exhibit excellent performance and stability at the microscopic level. The method proposed in this paper can dramatically improve the screening efficiency of microemulsions of anionic and nonanionic surfactants and accurately analyze the properties of microemulsions, so as to provide a theoretical basis for the subsequent research on microemulsions.
Collapse
Affiliation(s)
- Biao Zhang
- Research
Institute of Percolation Fluids Mechanics, Chinese Academy of Sciences, Beijing 100010, China
| | - Baoshan Guan
- Research
Institute of Percolation Fluids Mechanics, Chinese Academy of Sciences, Beijing 100010, China
- Research
Institute of Petroleum Exploration and Development, Beijing 100010, China
| | - Yufan Tao
- Research
Institute of Percolation Fluids Mechanics, Chinese Academy of Sciences, Beijing 100010, China
| | - Weidong Liu
- Research
Institute of Percolation Fluids Mechanics, Chinese Academy of Sciences, Beijing 100010, China
- Research
Institute of Petroleum Exploration and Development, Beijing 100010, China
| | - Baoliang Peng
- Research
Institute of Petroleum Exploration and Development, Beijing 100010, China
| | - Kai Lv
- Research
Institute of Percolation Fluids Mechanics, Chinese Academy of Sciences, Beijing 100010, China
| |
Collapse
|
2
|
Hunter MA, Demir B, Petersen CF, Searles DJ. New Framework for Computing a General Local Self-Diffusion Coefficient Using Statistical Mechanics. J Chem Theory Comput 2022; 18:3357-3363. [PMID: 35657378 DOI: 10.1021/acs.jctc.2c00207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Widely applicable, modified Green-Kubo expressions for the local diffusion coefficient (Dl) are obtained using linear response theory. In contrast to past definitions in use, these expressions are statistical mechanical results. Molecular simulations of systems with anisotropic diffusion and an inhomogeneous density profile confirm the validity of the results. Diffusion coefficients determined from different expressions in terms of currents and velocity correlations agree in the limit of large systems. Furthermore, they apply to arbitrarily small local regions, making them readily applicable to nanoscale and inhomogeneous systems where knowledge of Dl is important.
Collapse
Affiliation(s)
- Michelle A Hunter
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Baris Demir
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Charlotte F Petersen
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia
| | - Debra J Searles
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, Queensland 4072, Australia.,School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, Queensland 4072, Australia
| |
Collapse
|
3
|
Stephan S, Schaefer D, Langenbach K, Hasse H. Mass transfer through vapour–liquid interfaces: a molecular dynamics simulation study. Mol Phys 2020. [DOI: 10.1080/00268976.2020.1810798] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Simon Stephan
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| | - Dominik Schaefer
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| | - Kai Langenbach
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| | - Hans Hasse
- Laboratory of Engineering Thermodynamics (LTD), TU Kaiserslautern, Kaiserslautern, Germany
| |
Collapse
|
4
|
|
5
|
Morrow BH, Maskey S, Gustafson MZ, Luning Prak DJ, Harrison JA. Impact of Molecular Structure on Properties of n-Hexadecane and Alkylbenzene Binary Mixtures. J Phys Chem B 2018; 122:6595-6603. [PMID: 29856636 DOI: 10.1021/acs.jpcb.8b03752] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Because of the complexity of petroleum-based fuels, researchers typically use simplified mixtures, known as surrogates, to study combustion behavior and to attempt to identify how physical properties are related to combustion. The process of determining the surrogate composition to yield a desired set of thermophysical properties can be a complicated and time-consuming task. As a result, the use of computer simulations to narrow the number of possible surrogate compositions is beginning to be explored. Herein, molecular dynamics (MD) simulations are used to model binary mixtures of n-hexadecane with either benzene, toluene, n-ethylbenzene, n-propylbenzene, or n-butylbenzene. Calculated densities are in quantitative agreement with experimental values. With the exception of the mixtures containing benzene, simulated excess molar volumes are also in very good agreement with measured values. Isentropic bulk moduli are in qualitative agreement with experiment, and reproduce interesting trends observed in the experimental data. Specifically, minima in the bulk moduli at intermediate compositions of several of the alkylbenzenes are correctly reproduced. In addition, the structures of the fluids are also examined. For mixtures of n-hexadecane with alkylbenzenes with longer chains, the orientation of the aromatic rings is not substantially impacted by composition. In contrast, increasing n-hexadecane content increases the ratio of parallel to perpendicular arrangements of benzene and toluene molecules. In those mixtures, this change in orientation of the aromatic rings could be responsible for the minima observed in the bulk moduli data. These results show that MD simulations can assist in development of fuel surrogates, both by predicting thermophysical properties and by providing insight into how molecular structure and composition affect those properties.
Collapse
Affiliation(s)
- Brian H Morrow
- Department of Chemistry , United States Naval Academy , Annapolis , Maryland 21402 , United States
| | - Sabina Maskey
- Department of Chemistry , United States Naval Academy , Annapolis , Maryland 21402 , United States
| | - Micah Z Gustafson
- Department of Chemistry , United States Naval Academy , Annapolis , Maryland 21402 , United States
| | - Dianne J Luning Prak
- Department of Chemistry , United States Naval Academy , Annapolis , Maryland 21402 , United States
| | - Judith A Harrison
- Department of Chemistry , United States Naval Academy , Annapolis , Maryland 21402 , United States
| |
Collapse
|
6
|
|
7
|
Brayton AL, Yeh IC, Andzelm JW, Rutledge GC. Vibrational Analysis of Semicrystalline Polyethylene Using Molecular Dynamics Simulation. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00995] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alexander L. Brayton
- Department of Chemical
Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| | - In-Chul Yeh
- U.S. Army
Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Jan W. Andzelm
- U.S. Army
Research Laboratory, Aberdeen Proving Ground, Maryland 21005, United States
| | - Gregory C. Rutledge
- Department of Chemical
Engineering, Massachusetts Institute of Technology, 77 Massachusetts
Avenue, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
8
|
Chilukoti HK, Kikugawa G, Ohara T. Structure and Mass Transport Characteristics at the Intrinsic Liquid-Vapor Interfaces of Alkanes. J Phys Chem B 2016; 120:7207-16. [PMID: 27387788 DOI: 10.1021/acs.jpcb.6b05332] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this paper, an instantaneous interface definition has been used to study the intrinsic structure and self-diffusion coefficient in the vicinity of the liquid-vapor interfaces of decane and tetracosane at three different temperatures using molecular dynamics simulations, and the results have been compared with those obtained on the basis of the conventional Gibbs dividing surface (time- and space-averaged interface). The alkane molecules were modeled using the united atom NERD force field. Partial layered structures of alkane molecules at the liquid-vapor interface are observed as a pinned structure of alkane liquids based on the intrinsic interface. This kind of characteristic has not been observed in the density profiles obtained based on the Gibbs dividing surface. By examining the orientation order parameter and radius of gyration of the alkane molecules, it was observed that the alkane molecules were preferentially oriented to be more parallel to the intrinsic interface than to the Gibbs dividing surface, and the shape of the alkane molecules is slightly changed in the vicinity of the liquid-vapor interfaces. The self-diffusion coefficient parallel to the intrinsic interface was examined using the Green-Kubo relation, where the projection of the velocity in the parallel direction to the local intrinsic interface is used in the velocity correlation function. It was found that the self-diffusion coefficient in the direction parallel to the intrinsic interface changes as the position approaches the interface in a more obvious manner as compared with the self-diffusion coefficient obtained with respect to the Gibbs dividing surface. These results suggest that the use of an instantaneous interface definition allowed us to capture sharp variations in transport properties which are originating due to steeper structure at the liquid-vapor interfaces.
Collapse
Affiliation(s)
- Hari Krishna Chilukoti
- Institute of Fluid Science, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Gota Kikugawa
- Institute of Fluid Science, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| | - Taku Ohara
- Institute of Fluid Science, Tohoku University , 2-1-1 Katahira, Aoba-ku, Sendai 980-8577, Japan
| |
Collapse
|
9
|
Chilukoti HK, Kikugawa G, Ohara T. Mass transport and structure of liquid n-alkane mixtures in the vicinity of α-quartz substrates. RSC Adv 2016. [DOI: 10.1039/c6ra22398b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The asymmetric self-diffusion characteristics of binary n-alkane mixtures in the first adsorption layer near α-quartz substrate were demonstrated and discussed.
Collapse
Affiliation(s)
| | - Gota Kikugawa
- Institute of Fluid Science
- Tohoku University
- Sendai
- Japan
| | - Taku Ohara
- Institute of Fluid Science
- Tohoku University
- Sendai
- Japan
| |
Collapse
|