Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics
Foam systems have been attracting extensive attention due to their importance in a variety of applications, e.g., in the cleaning industry, and in bubble flotation. In the context of flotation chemistry, flotation performance is strongly affected by bubble coalescence, which in turn relies significa...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-11-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/19/11/620 |
| _version_ | 1811262863633809408 |
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| author | Tiefeng Peng Qibin Li Longhua Xu Chao He Liqun Luo |
| author_facet | Tiefeng Peng Qibin Li Longhua Xu Chao He Liqun Luo |
| author_sort | Tiefeng Peng |
| collection | DOAJ |
| description | Foam systems have been attracting extensive attention due to their importance in a variety of applications, e.g., in the cleaning industry, and in bubble flotation. In the context of flotation chemistry, flotation performance is strongly affected by bubble coalescence, which in turn relies significantly on the surface forces upon the liquid film between bubbles. Conventionally, unusual short-range strongly repulsive surface interactions for Newton black films (NBF) between two interfaces with thickness of less than 5 nm were not able to be incorporated into the available classical Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory. The non-DLVO interaction would increase exponentially with the decrease of film thickness, as it plays a crucial role in determining liquid film stability. However, its mechanism and origin are still unclear. In the present work, we investigate the surface interaction of free-standing sodium dodecyl-sulfate (SDS) nanoscale black films in terms of disjoining pressure using the molecular simulation method. The aqueous nanoscale film, consisting of a water coating with SDS surfactants, and with disjoining pressure and film tension of SDS-NBF as a function of film thickness, were quantitatively determined by a post-processing technique derived from film thermodynamics. |
| first_indexed | 2024-04-12T19:33:24Z |
| format | Article |
| id | doaj.art-b2d4e43aa2f74a6b8b382216f8775037 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-04-12T19:33:24Z |
| publishDate | 2017-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-b2d4e43aa2f74a6b8b382216f87750372022-12-22T03:19:16ZengMDPI AGEntropy1099-43002017-11-01191162010.3390/e19110620e19110620Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film ThermodynamicsTiefeng Peng0Qibin Li1Longhua Xu2Chao He3Liqun Luo4Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaCollege of Aerospace Engineering, Chongqing University, Chongqing 400044, ChinaKey Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang 621010, ChinaKey Laboratory of New Materials and Facilities for Rural Renewable Energy, Ministry of Agriculture, Collaborative Innovation Center of Biomass Energy, College of Mechanical & Electrical Engineering, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, ChinaFoam systems have been attracting extensive attention due to their importance in a variety of applications, e.g., in the cleaning industry, and in bubble flotation. In the context of flotation chemistry, flotation performance is strongly affected by bubble coalescence, which in turn relies significantly on the surface forces upon the liquid film between bubbles. Conventionally, unusual short-range strongly repulsive surface interactions for Newton black films (NBF) between two interfaces with thickness of less than 5 nm were not able to be incorporated into the available classical Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory. The non-DLVO interaction would increase exponentially with the decrease of film thickness, as it plays a crucial role in determining liquid film stability. However, its mechanism and origin are still unclear. In the present work, we investigate the surface interaction of free-standing sodium dodecyl-sulfate (SDS) nanoscale black films in terms of disjoining pressure using the molecular simulation method. The aqueous nanoscale film, consisting of a water coating with SDS surfactants, and with disjoining pressure and film tension of SDS-NBF as a function of film thickness, were quantitatively determined by a post-processing technique derived from film thermodynamics.https://www.mdpi.com/1099-4300/19/11/620newton black filmssurface forcemolecular simulationDLVO |
| spellingShingle | Tiefeng Peng Qibin Li Longhua Xu Chao He Liqun Luo Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics Entropy newton black films surface force molecular simulation DLVO |
| title | Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics |
| title_full | Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics |
| title_fullStr | Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics |
| title_full_unstemmed | Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics |
| title_short | Surface Interaction of Nanoscale Water Film with SDS from Computational Simulation and Film Thermodynamics |
| title_sort | surface interaction of nanoscale water film with sds from computational simulation and film thermodynamics |
| topic | newton black films surface force molecular simulation DLVO |
| url | https://www.mdpi.com/1099-4300/19/11/620 |
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