PEBAX registered with PEG functionalized POSS as nanocomposite membranes for CO2 separation
Nanocomposite membranes were prepared by incorporation of commercial poly(ethylene glycol) functionalized polyoctahedral oligomeric silsesquioxanes (PEG-POSS) in two grades of poly(ether-block-amide) namely PEBAX registered MH 1657 and PEBAX registered 2533. Single gas permeabilities of N2, O2, CH4,...
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Veröffentlicht in: | Journal of membrane science 2013-06, Vol.437, p.286-297 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Nanocomposite membranes were prepared by incorporation of commercial poly(ethylene glycol) functionalized polyoctahedral oligomeric silsesquioxanes (PEG-POSS) in two grades of poly(ether-block-amide) namely PEBAX registered MH 1657 and PEBAX registered 2533. Single gas permeabilities of N2, O2, CH4, H2, and CO2 were measured using the time-lag method. CO2 permeability increased two fold after incorporation of 30 wt% PEG-POSS in PEBAX registered MH 1657, while the selectivity was not significantly affected at 30 degree C. Simultaneous enhancement in permeability and selectivity was observed up to 30 wt% loading of PEG-POSS in PEBAX registered 2533 at 30 degree C. The effect of temperature upon CO2 permeability and CO2 selectivity over N2, O2, CH4 and H2 was studied between 30 degree C to 70 degree C. Substantial influence upon the thermal transition of the polyether domain of both polymers was observed due to incorporation of PEG-POSS by differential scanning calorimetry (DSC). Atomic force microscopy was used to evaluate the impact of 30 wt% PEG-POSS loading upon the surface topography of both investigated grades of PEBAX registered . Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were used to study the membrane morphology and the distribution of the nanofillers (PEG-POSS) in PEBAX registered membranes. |
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ISSN: | 0376-7388 |
DOI: | 10.1016/j.memsci.2013.03.001 |