Demonstrating Aqueous-Phase Low-Molecular-Weight-Gel Wicking of Oil for the Remediation of Oil Spilled into Surface Water
| Autor: | Emilie Espitalié, Anwu Li, Daniel J. Walls, Michael Gattrell, Jun Chen, Gabriel Hum, John M. Frostad |
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| Přispěvatelé: | Department of Microbiology and Immunology [Vancouver] (UBC Microbiology), University of British Columbia (UBC), Laboratoire de génie chimique [ancien site de Basso-Cambo] (LGC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), University of British Columbia (CANADA), Laboratoire de Génie Chimique - LGC (Toulouse, France) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nucleation 02 engineering and technology 010402 general chemistry 01 natural sciences Absorption [CHIM.GENI]Chemical Sciences/Chemical engineering Rheology Chemical structure Electrochemistry Washburn's equation Génie chimique General Materials Science [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering Génie des procédés Spectroscopy Aqueous solution Aqueous two-phase system Surfaces and Interfaces 021001 nanoscience & nanotechnology Condensed Matter Physics Lipids 0104 chemical sciences Shear (sheet metal) Chemical engineering Structural dynamics Absorption (chemistry) 0210 nano-technology Porous medium |
| Zdroj: | Langmuir Langmuir, American Chemical Society, 2020, 36 (44), pp.13155-13165. ⟨10.1021/acs.langmuir.0c00917⟩ |
| ISSN: | 0743-7463 1520-5827 |
| Popis: | International audience; Oils spilled into surface water require effective and timelytreatment. In this paper, we report on a low-molecular-weight gelator that can form gels in organic and aqueous phases. The aqueous gel was observed to absorb oils, which is proposed as a new class of materials for remediatingoil spilled into surface water. The gels and the low molecular-weight gelator have both fundamental and applied significance. Fundamentally, identifying the mechanisms that govern the formation of these gels and their resultant mechanical properties is of interest. Subsequently, these fundamental insights aid in the optimization of these gels for addressing spilled oil. First, we briefly compare the organic and aqueous gels qualitatively before focusing on the aqueous gel. Second, we demonstrate the ability of the aqueous gel to wick oils through experiments in a Hele-Shaw cell and compare our results to the Washburn equation for porous media. The Washburn equation is not entirely adequate in describing our results due to the change in volume of the porous media during the wicking process. Finally, we investigate mechanisms proposed to govern the formation of low-molecular-weight gels in the literature through rheological shear measurements during gel formation. Our experiments suggest that the proposed mechanisms are applicable to our aqueous gels, growing as anisotropic crystal networks with fractal dimensions between one and two dimensions from temporally sporadic nucleation sites. |
| Databáze: | OpenAIRE |
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