Polymer Membrane Cavities Tuned by a Removable Inorganic-Phase Additive for Enhanced CO2 Separation
Polyether block amide (Pebax) is a commercially available polymer that has gained attention for capturing CO2 from flue gas. However, its relatively low permeance and CO2/N2 selectivity limit its large-scale industrial applications. Herein, we proposed an approach to adjust the interchain cavities a...
| Veröffentlicht in: | Langmuir : the ACS journal of surfaces and colloids. - 1985. - (2025) vom: 22. Mai |
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| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Langmuir : the ACS journal of surfaces and colloids |
| Schlagworte: | Journal Article |
| Zusammenfassung: | Polyether block amide (Pebax) is a commercially available polymer that has gained attention for capturing CO2 from flue gas. However, its relatively low permeance and CO2/N2 selectivity limit its large-scale industrial applications. Herein, we proposed an approach to adjust the interchain cavities and improve the permeance of the Pebax membrane by adding a water-soluble additive, ammonium carbonate (AC), into the Pebax polymer, aiming to form removable inorganic phases in the Pebax membrane. A series of Pebax membranes with varying concentrations of AC content were fabricated via a spin-coating process. The AC was decomposed by subsequent thermal treatment, thus creating subnanometer pores in the Pebax membrane substrate while preserving the membrane's integrity. The optimized Pebax-AC membranes achieved a CO2 permeance of 111 GPU and a CO2/N2 selectivity of 74, showing increments of 68% and 37% in comparison with pure Pebax membranes. Our results indicate that incorporating removable inorganic phases is a promising strategy for advancing membrane-based CO2 capture |
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| Beschreibung: | Date Revised 22.05.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1520-5827 |
| DOI: | 10.1021/acs.langmuir.4c05297 |