Interfacial Rheology and Heterogeneity of Aging Asphaltene Layers at the Water-Oil Interface
| Autor: | Jodi M. Mecca, Ian Williams, Tom H. Kalantar, Chih-Cheng Chang, Tzu-Chi Kuo, Todd M. Squires, Adam K. Schmitt, Vincent Mansard, Arash Nowbahar |
|---|---|
| Přispěvatelé: | Department of Chemical Engineering [Santa Barbara], University of California [Santa Barbara] (UC Santa Barbara), University of California (UC)-University of California (UC), Équipe Microsystèmes électromécaniques (LAAS-MEMS), Laboratoire d'analyse et d'architecture des systèmes (LAAS), Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université Toulouse - Jean Jaurès (UT2J), Université de Toulouse (UT)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université Toulouse Capitole (UT Capitole), Université de Toulouse (UT), The Dow Chemical Company, University of California [Santa Barbara] (UCSB), University of California-University of California, Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse - Jean Jaurès (UT2J)-Université Toulouse 1 Capitole (UT1), Université Fédérale Toulouse Midi-Pyrénées |
| Rok vydání: | 2018 |
| Předmět: |
Coalescence (physics)
Chemical substance Materials science [SPI.FLUID]Engineering Sciences [physics]/Reactive fluid environment 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Viscoelasticity 0104 chemical sciences [SPI]Engineering Sciences [physics] Adsorption Interfacial shear Rheology Chemical engineering 13. Climate action Emulsion Electrochemistry General Materials Science 0210 nano-technology Spectroscopy Asphaltene |
| Zdroj: | Langmuir Langmuir, 2018, 34 (19), pp.5409-5415. ⟨10.1021/acs.langmuir.8b00176⟩ Langmuir, American Chemical Society, 2018, 34 (19), pp.5409-5415. ⟨10.1021/acs.langmuir.8b00176⟩ |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.8b00176⟩ |
| Popis: | International audience; Surface-active asphaltene molecules are naturally found in crude oil, causing serious problems in the petroleum industry by stabilizing emulsion drops, thus hindering the separation of water and oil. Asphaltenes can adsorb at water–oil interfaces to form viscoelastic interfacial films that retard or prevent coalescence. Here, we measure the evolving interfacial shear rheology of water–oil interfaces as asphaltenes adsorb. Generally, interfaces stiffen with time, and the response crosses over from viscous-dominated to elastic-dominated. However, significant variations in the stiffness evolution are observed in putatively identical experiments. Direct visualization of the interfacial strain field reveals significant heterogeneities within each evolving film, which appear to be an inherent feature of the asphaltene interfaces. Our results reveal the adsorption process and aged interfacial structure to be more complex than that previously described. The complexities likely impact the coalescence of asphaltene-stabilized droplets, and suggest new challenges in destabilizing crude oil emulsions. |
| Databáze: | OpenAIRE |
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