Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components
Hydraulic permeability measurements are performed on low cut-off Na-mordenite (MOR-type zeolites) membranes after a mild alkaline treatment. A decrease of the hydraulic permeability is systematically observed. Contact angle measurements are carried out (with three polar liquids) on Na-mordenite film...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/524259 |
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| author | Patrick Dutournié Ali Said T. Jean Daou Jacques Bikaï Lionel Limousy |
| author_facet | Patrick Dutournié Ali Said T. Jean Daou Jacques Bikaï Lionel Limousy |
| author_sort | Patrick Dutournié |
| collection | DOAJ |
| description | Hydraulic permeability measurements are performed on low cut-off Na-mordenite (MOR-type zeolites) membranes after a mild alkaline treatment. A decrease of the hydraulic permeability is systematically observed. Contact angle measurements are carried out (with three polar liquids) on Na-mordenite films seeded onto alumina plates (flat membranes). A decrease of the contact angles is observed after the alkaline treatment for the three liquids. According to the theory of Lifshitz-van der Waals interactions in condensated state, surface modifications are investigated and a variation of the polar component of the material surface tension is observed. After the alkaline treatment, the electron-donor contribution (mainly due to the two remaining lone electron pairs of the oxygen atoms present in the zeolite extra frameworks) decreases and an increase of the electron-receptor contribution is observed and quantified. The contribution of the polar component to the surface tension is attributed to the presence of surface defaults, which increase the surface hydrophilicity. The estimated modifications of the surface interaction energy between the solvent (water) and the Na-mordenite active layer are in good agreement with the decrease of the hydraulic permeability observed after a mild alkaline treatment. |
| format | Article |
| id | doaj-art-9099677e8ffc4c1a8f8c4331cbba55c6 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-9099677e8ffc4c1a8f8c4331cbba55c62025-02-03T05:44:30ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422015-01-01201510.1155/2015/524259524259Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension ComponentsPatrick Dutournié0Ali Said1T. Jean Daou2Jacques Bikaï3Lionel Limousy4Institut de Science des Matériaux de Mulhouse (IS2M-UMR CNRS 7361), Université de Strasbourg, Université de Haute Alsace, 3 bis rue A. Werner, 68093 Mulhouse Cedex, FranceInstitut de Science des Matériaux de Mulhouse (IS2M-UMR CNRS 7361), Université de Strasbourg, Université de Haute Alsace, 3 bis rue A. Werner, 68093 Mulhouse Cedex, FranceInstitut de Science des Matériaux de Mulhouse (IS2M-UMR CNRS 7361), Université de Strasbourg, Université de Haute Alsace, 3 bis rue A. Werner, 68093 Mulhouse Cedex, FranceInstitut de Science des Matériaux de Mulhouse (IS2M-UMR CNRS 7361), Université de Strasbourg, Université de Haute Alsace, 3 bis rue A. Werner, 68093 Mulhouse Cedex, FranceInstitut de Science des Matériaux de Mulhouse (IS2M-UMR CNRS 7361), Université de Strasbourg, Université de Haute Alsace, 3 bis rue A. Werner, 68093 Mulhouse Cedex, FranceHydraulic permeability measurements are performed on low cut-off Na-mordenite (MOR-type zeolites) membranes after a mild alkaline treatment. A decrease of the hydraulic permeability is systematically observed. Contact angle measurements are carried out (with three polar liquids) on Na-mordenite films seeded onto alumina plates (flat membranes). A decrease of the contact angles is observed after the alkaline treatment for the three liquids. According to the theory of Lifshitz-van der Waals interactions in condensated state, surface modifications are investigated and a variation of the polar component of the material surface tension is observed. After the alkaline treatment, the electron-donor contribution (mainly due to the two remaining lone electron pairs of the oxygen atoms present in the zeolite extra frameworks) decreases and an increase of the electron-receptor contribution is observed and quantified. The contribution of the polar component to the surface tension is attributed to the presence of surface defaults, which increase the surface hydrophilicity. The estimated modifications of the surface interaction energy between the solvent (water) and the Na-mordenite active layer are in good agreement with the decrease of the hydraulic permeability observed after a mild alkaline treatment.http://dx.doi.org/10.1155/2015/524259 |
| spellingShingle | Patrick Dutournié Ali Said T. Jean Daou Jacques Bikaï Lionel Limousy Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components Advances in Materials Science and Engineering |
| title | Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components |
| title_full | Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components |
| title_fullStr | Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components |
| title_full_unstemmed | Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components |
| title_short | Hydraulic Performance Modifications of a Zeolite Membrane after an Alkaline Treatment: Contribution of Polar and Apolar Surface Tension Components |
| title_sort | hydraulic performance modifications of a zeolite membrane after an alkaline treatment contribution of polar and apolar surface tension components |
| url | http://dx.doi.org/10.1155/2015/524259 |
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