Separation performance of asymmetric membranes based on PEGDa/PEI semi interpenetrating polymer network in pure and binary gas mixtures of CO2, N2 and CH4

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DOIResolve DOI: http://doi.org/10.1016/j.memsci.2010.06.045
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TypeArticle
Journal titleJournal of membrane science
Volume362
IssueOctober
Pages353359; # of pages: 7
SubjectPolyimides; Semi-interpenetrating polymer networks (semi-IPNs); Poly(ethylene glycol) diacrylate; Gas permeation and plasticization; Binary gas mixtures
AbstractAsymmetric membranes of semi-interpenetrating polymer networks (semi-IPN) were prepared with commercial poly (ether imide) (ULTEM®) and poly (ethylene glycol) diacrylate (PEGDa) in 1-methyl-2-pyrrolidinone (NMP). The selectivity and permeance of pure and mixed gases using carbon dioxide (CO2) feed concentrations of 10–40% in nitrogen (N2) or methane (CH4) were measured by the constant pressure and variable volume method at an absolute feed pressure of 1.35MPa and 22 ◦C. The pure gas selectivity matched the mixed gas selectivity values at different feed concentrations, which indicated absence of plasticization. The fugacity based CO2/N2 selectivity of a semi-IPN with 6% PEGDa solids content reached 50±4, which is comparable to the pure gas selectivity of a dense PEGDa film (alpha = 54) and is significantly higher than the dense film selectivity of PEI (alpha = 28). The selectivity for CO2/CH4 mixtures is 43±10,comparable to the dense film properties of PEI (alpha = 39) and not the dense film selectivity of PEGDa (alpha = 20). The PEGDa/PEI semi-IPN membranes displayed synergistic properties, where the selectivity approached the higher value of the two materials used in making the semi-IPNs.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Chemical Process and Environmental Technology
Peer reviewedYes
NRC number52224
NPARC number16352290
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Record identifier8f56342f-5224-4cf4-9e3f-2ca82cc40bbe
Record created2010-11-09
Record modified2016-05-09
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