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Gresham IJ, Willott JD, Johnson EC, Li P, Webber GB, Wanless EJ, Nelson AR, Prescott SW. Effect of surfactants on the thermoresponse of PNIPAM investigated in the brush geometry. J Colloid Interface Sci 2022; 631:260-271. [DOI: 10.1016/j.jcis.2022.10.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/10/2022] [Accepted: 10/15/2022] [Indexed: 11/05/2022]
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Chen L, Xiong Z, Din ZU, Nawaz A, Xiong H, Cai J. Interfacial modification of starch at high concentration by sodium dodecylsulfate as revealed by experiments and molecular simulation. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Liu D, Li Y, Liu F, Zhou W, Sun A, Liu X, Chen F, Xu BB, Wei J. Interfacial Interaction Enhanced Rheological Behavior in PAM/CTAC/Salt Aqueous Solution-A Coarse-Grained Molecular Dynamics Study. Polymers (Basel) 2020; 12:polym12020265. [PMID: 31991789 PMCID: PMC7077399 DOI: 10.3390/polym12020265] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 01/19/2020] [Accepted: 01/21/2020] [Indexed: 11/16/2022] Open
Abstract
Interfacial interactions within a multi-phase polymer solution play critical roles in processing control and mass transportation in chemical engineering. However, the understandings of these roles remain unexplored due to the complexity of the system. In this study, we used an efficient analytical method-a nonequilibrium molecular dynamics (NEMD) simulation-to unveil the molecular interactions and rheology of a multiphase solution containing cetyltrimethyl ammonium chloride (CTAC), polyacrylamide (PAM), and sodium salicylate (NaSal). The associated macroscopic rheological characteristics and shear viscosity of the polymer/surfactant solution were investigated, where the computational results agreed well with the experimental data. The relation between the characteristic time and shear rate was consistent with the power law. By simulating the shear viscosity of the polymer/surfactant solution, we found that the phase transition of micelles within the mixture led to a non-monotonic increase in the viscosity of the mixed solution with the increase in concentration of CTAC or PAM. We expect this optimized molecular dynamic approach to advance the current understanding on chemical-physical interactions within polymer/surfactant mixtures at the molecular level and enable emerging engineering solutions.
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Affiliation(s)
- Dongjie Liu
- School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China; (D.L.); (W.Z.)
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
| | - Yong Li
- Drilling and Production Engineering Research Institute, Chuanqing Drilling and Exploration Engineering Company Ltd., CNPC, Xi’an 710018, China;
| | - Fei Liu
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
| | - Wenjing Zhou
- School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China; (D.L.); (W.Z.)
| | - Ansu Sun
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK; (A.S.); (X.L.)
| | - Xiaoteng Liu
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK; (A.S.); (X.L.)
| | - Fei Chen
- School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China; (D.L.); (W.Z.)
- Correspondence: (F.C.); (B.B.X.); (J.W.); Tel.: +86-029-82664375 (J.W.)
| | - Ben Bin Xu
- Mechanical and Construction Engineering, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne, NE1 8ST, UK; (A.S.); (X.L.)
- Correspondence: (F.C.); (B.B.X.); (J.W.); Tel.: +86-029-82664375 (J.W.)
| | - Jinjia Wei
- School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China; (D.L.); (W.Z.)
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an 710049, China;
- Correspondence: (F.C.); (B.B.X.); (J.W.); Tel.: +86-029-82664375 (J.W.)
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Zhao H, Yang Y, Shu X, Wang Y, Ran Q. Adsorption of organic molecules on mineral surfaces studied by first-principle calculations: A review. Adv Colloid Interface Sci 2018; 256:230-241. [PMID: 29656761 DOI: 10.1016/j.cis.2018.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 04/03/2018] [Accepted: 04/04/2018] [Indexed: 11/16/2022]
Abstract
First-principle calculations, especially by the density functional theory (DFT) methods, are becoming a power technique to study molecular structure and properties of organic/inorganic interfaces. This review introduces some recent examples on the study of adsorption models of organic molecules or oligomers on mineral surfaces and interfacial properties obtained from first-principles calculations. The aim of this contribution is to inspire scientists to benefit from first-principle calculations and to apply the similar strategies when studying and tailoring interfacial properties at the atomistic scale, especially for those interested in the design and development of new molecules and new products.
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Affiliation(s)
- Hongxia Zhao
- State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, Jiangsu, China; Jiangsu Sobute New Materials Co. Ltd., Nanjing 211103, Jiangsu, China
| | - Yong Yang
- State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, Jiangsu, China; Jiangsu Sobute New Materials Co. Ltd., Nanjing 211103, Jiangsu, China
| | - Xin Shu
- State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, Jiangsu, China; Jiangsu Sobute New Materials Co. Ltd., Nanjing 211103, Jiangsu, China
| | - Yanwei Wang
- State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, Jiangsu, China; Jiangsu Sobute New Materials Co. Ltd., Nanjing 211103, Jiangsu, China.
| | - Qianping Ran
- State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 210008, Jiangsu, China; Jiangsu Sobute New Materials Co. Ltd., Nanjing 211103, Jiangsu, China.
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Characterizing the impact of surfactant structure on interfacial tension: a molecular dynamics study. J Mol Model 2017; 23:112. [DOI: 10.1007/s00894-017-3285-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2016] [Accepted: 02/20/2017] [Indexed: 10/20/2022]
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Yang Z, Tarabara VV, Bruening ML. Adsorption of Anionic or Cationic Surfactants in Polyanionic Brushes and Its Effect on Brush Swelling and Fouling Resistance during Emulsion Filtration. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:11790-9. [PMID: 26442835 DOI: 10.1021/acs.langmuir.5b01938] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Atom transfer radical polymerization of ionic monomers from membrane surfaces yields polyelectrolyte brushes that swell in water and repel oil droplets to resist fouling during filtration of oil-in-water emulsions. However, surfactant adsorption to polyelectrolyte brushes may overcome this fouling resistance. This work examines adsorption of cationic and anionic surfactants in polyanionic brushes and the effect of these surfactants on emulsion filtration. In situ ellipsometry with films on flat surfaces shows that brushes composed of poly(3-sulfopropyl methacrylate salts) (pSPMK) swell 280% in water and do not adsorb sodium dodecyl sulfate (SDS). pSPMK-modified microfiltration membranes reject >99.9% of the oil from SDS-stabilized submicron emulsions, and the specific flux through these modified membranes is comparable to that through NF270 nanofiltration membranes. Moreover, the brush-modified membranes show no decline in flux over a 12 h filtration, whereas the flux through NF270 membranes decreases by 98.7%. In contrast, pSPMK brushes adsorb large quantities of cetyltrimethylammonium bromide (CTAB), and at low chain densities the brushes collapse in the presence of this cationic surfactant. Filtration of CTAB-stabilized emulsions through pSPMK-modified membranes gives minimal oil rejection, presumably due to the brush collapse. Thus, the fouling resistance of polyelectrolyte brush-modified membranes clearly depends on the surfactant composition in a particular emulsion.
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Affiliation(s)
- Zhefei Yang
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, Michigan State University , East Lansing, Michigan 48824, United States
| | - Volodymyr V Tarabara
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, Michigan State University , East Lansing, Michigan 48824, United States
| | - Merlin L Bruening
- Department of Chemistry and ‡Department of Civil and Environmental Engineering, Michigan State University , East Lansing, Michigan 48824, United States
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