Influence of sol-gel process parameters on the micro-structure and performance of hybrid silica membranes
| Autor: | Arian Nijmeijer, Louis Winnubst, Hammad F. Qureshi |
|---|---|
| Přispěvatelé: | Inorganic Membranes, Faculty of Science and Technology |
| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: |
Materials science
IR-87830 Filtration and Separation Microporous material Permeance Permeation Biochemistry law.invention Membrane Chemical engineering METIS-296810 law Polymer chemistry General Materials Science Calcination Particle size Physical and Theoretical Chemistry Mesoporous material Sol-gel |
| Zdroj: | Journal of membrane science, 446, 19-25. Elsevier |
| ISSN: | 0376-7388 |
| DOI: | 10.1016/j.memsci.2013.06.024 |
| Popis: | A facile, versatile and reproducible sol–gel process to make microporous organosilica membranes by using 1,2-bis (triethoxysilyl) ethane (BTESE) as a precursor is reported. The influence of process parameters on sol particle size and rheology of BETSE-derived sols was investigated to produce defect-free composite membranes by a single dipping procedure and subsequent calcination. The microporous structure of a BTESE layer on mesoporous alumina supports enabled selective molecular sieving of gas molecules. Single gas permeation (SGP) experiments, performed at 200 C, showed that a H2/CH4 permselectivity of 24 was reproducibly achieved. NoSF6 gas permeance through these membranes proof the presence of a defect-free microstructure. SEM cross-section analysis showed a hybrid selective layer with a thickness dependent on the sol precursor concentration. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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