| Autor: |
Radmanesh F; Membrane Science and Technology Cluster, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands., Elshof MG; Membrane Science and Technology Cluster, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands., Benes NE; Membrane Science and Technology Cluster, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands. |
| Jazyk: |
angličtina |
| Zdroj: |
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2021 Feb 24; Vol. 13 (7), pp. 8960-8966. Date of Electronic Publication: 2021 Feb 10. |
| DOI: |
10.1021/acsami.0c21968 |
| Abstrakt: |
There is a need for gas separation membranes that can perform at high temperatures, for example, for CO 2 capture in industrial processes. Polyphosphazenes classify as interesting materials for use under these conditions because of their high thermal stability, hybrid nature, and postfunctionalization options. In this work, thin-film composite cyclomatrix polyphosphazene membranes are prepared via the interfacial polymerization reaction between polyhedral oligomeric silsesquioxane and hexachlorocyclotriphosphazene on top of a ceramic support. The prepared polyphosphazene networks are highly crosslinked and show excellent thermal stability until 340 °C. Single gas permeation experiments at temperatures ranging from 50 to 250 °C reveal a molecular sieving behavior, with permselectivities as high as 130 for H 2 /CH 4 at the low temperatures. The permselectivities of the membranes persist at the higher temperatures; at 250 °C H 2 /N 2 (40), H 2 /CH 4 (31) H 2 /CO 2 (7), and CO 2 /CH 4 (4), respectively, while maintaining permeances in the order of 10 -7 to 10 -8 mol m -2 s -1 Pa -1 . Compared to other types of polymer-based membranes, especially the H 2 /N 2 and H 2 /CH 4 selectivities are high, with similar permeances. Consequently, the hybrid polyphosphazene membranes have great potential for use in high-temperature gas separation applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
