Unveiling the distribution and molecular interactions of gases in membranes of PPO and PC with porous biphenyl-based knitting aryl polymer (K2Ph) and their influence on gas transport with NMR
NMR spectroscopy combined with pulsed gradient spin-echo (PGSE) NMR are used to study, at the molecular scale, the interactions and transport of pure and mixed CO<inf>2</inf> and CH<inf>4</inf> in mixed matrix membranes (MMMs) of poly(2,6-dimethyl-p-phenylene oxide) (PPO) and...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/402063 |
| Acceso en línea: | http://hdl.handle.net/10261/402063 https://api.elsevier.com/content/abstract/scopus_id/105015982031 |
| Access Level: | acceso abierto |
| Palabra clave: | Gas separation Glassy polymers Mixed matrix membranes NMR Porous organic polymers |
| Sumario: | NMR spectroscopy combined with pulsed gradient spin-echo (PGSE) NMR are used to study, at the molecular scale, the interactions and transport of pure and mixed CO<inf>2</inf> and CH<inf>4</inf> in mixed matrix membranes (MMMs) of poly(2,6-dimethyl-p-phenylene oxide) (PPO) and poly[bisphenol A carbonate-co-4,4’-(3,3,5-trimethylcyclohexylidene) diphenol carbonate] (PC) with porous biphenyl-based knitting aryl polymer (K2Ph) as filler. The results of T<inf>1</inf>s relaxation times and chemical shifts measurements of the sorbed gases show two populations in the MMMs associated with the polymer and filler phases. Similarly, the analysis of the gases diffusion measurements leads to two components, fast and slow tentatively assigned to the filler and polymer phases in the MMMs, respectively. The comparison of NMR results with independent measurements of total gas permeability contributes to unveil the mechanisms of gas transport in membranes of glassy PPO and PC with porous K2Ph. |
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