Effects of CO2 exposure and physical aging on the gas permeability of thin 6FDA-based polyimide membranes. Part 2. with crosslinking
DC Field | Value | Language |
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dc.contributor.author | Kim, Joo Heon | - |
dc.contributor.author | Koros, William J. | - |
dc.contributor.author | Paul, Donald Ross | - |
dc.date.available | 2019-09-02T00:55:05Z | - |
dc.date.issued | 2006-10 | - |
dc.identifier.issn | 0376-7388 | - |
dc.identifier.issn | 1873-3123 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/36524 | - |
dc.description.abstract | The changes in permeability of N2, O2, He, CH4 and CO2 of thin films (∼300 nm) of crosslinked and uncrosslinked 6FDA-based polyimides with DABA units in the chain were monitored as a function of aging time at 35 °C. The crosslinked polyimides have significantly lower permeability than the corresponding uncrosslinked material. Over about 2000 h of aging, the oxygen permeability decreased by two- to three-fold depending on the polymer structure. The changes in density for the crosslinked and uncrosslinked polyimides with aging time were calculated from refractive index measurements made by ellipsometry using the Lorentz-Lorenz equation. An excellent correlation between the volumetric aging rate and the permeability reduction rate is observed for these polyimides and other glassy polymers. On a relative basis, it seems that the crosslinked polyimide films show slightly higher or about the same aging rates than uncrosslinked polyimide films. Periodic exposure to CO2 has a significant effect on the permeability and selectivity and how they change with physical aging for the uncrosslinked polyimides but the effects for crosslinked films are much less. Thus, crosslinking appears to be a viable strategy for mitigating the plasticization or conditioning effects of CO2 exposure. © 2006 Elsevier B.V. All rights reserved. | - |
dc.format.extent | 12 | - |
dc.language | 영어 | - |
dc.language.iso | ENG | - |
dc.publisher | Elsevier BV | - |
dc.title | Effects of CO2 exposure and physical aging on the gas permeability of thin 6FDA-based polyimide membranes. Part 2. with crosslinking | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.memsci.2006.05.003 | - |
dc.identifier.bibliographicCitation | Journal of Membrane Science, v.282, no.1-2, pp 32 - 43 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.wosid | 000240579700005 | - |
dc.identifier.scopusid | 2-s2.0-33747759771 | - |
dc.citation.endPage | 43 | - |
dc.citation.number | 1-2 | - |
dc.citation.startPage | 32 | - |
dc.citation.title | Journal of Membrane Science | - |
dc.citation.volume | 282 | - |
dc.type.docType | Article | - |
dc.publisher.location | 네델란드 | - |
dc.subject.keywordAuthor | Aging | - |
dc.subject.keywordAuthor | Carbon dioxide | - |
dc.subject.keywordAuthor | Gas permeability | - |
dc.subject.keywordAuthor | Membranes | - |
dc.subject.keywordAuthor | Polyimide | - |
dc.subject.keywordPlus | Carbon dioxide | - |
dc.subject.keywordPlus | Crosslinking | - |
dc.subject.keywordPlus | Gas permeable membranes | - |
dc.subject.keywordPlus | Mechanical permeability | - |
dc.subject.keywordPlus | Polyimides | - |
dc.subject.keywordPlus | Aging | - |
dc.subject.keywordPlus | Crosslinked polyimides | - |
dc.subject.keywordPlus | Gas permeability | - |
dc.subject.keywordPlus | Plasticization | - |
dc.subject.keywordPlus | Polymeric membranes | - |
dc.subject.keywordPlus | carbon dioxide | - |
dc.subject.keywordPlus | nitrogen | - |
dc.subject.keywordPlus | oxygen | - |
dc.subject.keywordPlus | polyimide | - |
dc.subject.keywordPlus | polymer | - |
dc.subject.keywordPlus | Carbon dioxide | - |
dc.subject.keywordPlus | Crosslinking | - |
dc.subject.keywordPlus | Gas permeable membranes | - |
dc.subject.keywordPlus | Mechanical permeability | - |
dc.subject.keywordPlus | Polyimides | - |
dc.subject.keywordPlus | Polymeric membranes | - |
dc.subject.keywordPlus | ab initio calculation | - |
dc.subject.keywordPlus | article | - |
dc.subject.keywordPlus | artificial membrane | - |
dc.subject.keywordPlus | correlation analysis | - |
dc.subject.keywordPlus | cross linking | - |
dc.subject.keywordPlus | ellipsometry | - |
dc.subject.keywordPlus | exposure | - |
dc.subject.keywordPlus | film | - |
dc.subject.keywordPlus | gas permeability | - |
dc.subject.keywordPlus | mathematical model | - |
dc.subject.keywordPlus | measurement | - |
dc.subject.keywordPlus | physical chemistry | - |
dc.subject.keywordPlus | priority journal | - |
dc.subject.keywordPlus | surface property | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.description.journalRegisteredClass | sci | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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