Synergy of selective gas transport in bilayered membranes

Dense bilayer PTMSP/PIM-1 membranes and PTMSP/PIM-1 blends were prepared and studied in order to obtain insight into the recently observed synergistic effect of increased CO2/N2 selectivity for thin-film composite (TFC) membranes consist of PIM-1 (selective layer) and PTMSP (gutter layer). It was sh...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 1696; no. 1; pp. 12038 - 12044
Main Authors Bakhtin, D S, Borisov, I L, Polevaya, V G, Budd, P M, Volkov, A V
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.12.2020
Subjects
Blending effects
Gas transport
Membranes
Physics
Polymers
Selectivity
Synergistic effect
Transport properties
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Summary:Dense bilayer PTMSP/PIM-1 membranes and PTMSP/PIM-1 blends were prepared and studied in order to obtain insight into the recently observed synergistic effect of increased CO2/N2 selectivity for thin-film composite (TFC) membranes consist of PIM-1 (selective layer) and PTMSP (gutter layer). It was shown that the mixing of these two polymers does not lead to a synergistic effect in gas permeance, since dense films made by blending of PIM-1 and PTMSP showed classical trade-off permeation/selectivity behavior. Analysis of gas-transport property data using a bicomponent resistance-in-series model allowed us to conclude that the increased N2 transport resistance of the layer formed on the border of the two polymers is presumably responsible for the increased ideal selectivity.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1696/1/012038