Show simple item record

dc.contributor.authorSwaidan, Raja
dc.contributor.authorGhanem, Bader
dc.contributor.authorAl-Saeedi, Majed
dc.contributor.authorLitwiller, Eric
dc.contributor.authorPinnau, Ingo
dc.date.accessioned2015-08-03T12:16:56Z
dc.date.available2015-08-03T12:16:56Z
dc.date.issued2014-10-22
dc.identifier.citationSwaidan, R., Ghanem, B., Al-Saeedi, M., Litwiller, E., & Pinnau, I. (2014). Role of Intrachain Rigidity in the Plasticization of Intrinsically Microporous Triptycene-Based Polyimide Membranes in Mixed-Gas CO2/CH4 Separations. Macromolecules, 47(21), 7453–7462. doi:10.1021/ma501798v
dc.identifier.issn00249297
dc.identifier.doi10.1021/ma501798v
dc.identifier.urihttp://hdl.handle.net/10754/563851
dc.description.abstractBased on high-pressure pure- and mixed-gas (50:50) CO2/CH4 separation properties of two intrinsically microporous triptycene-based polyimides (TPDA-TMPD and TPDA-6FpDA), the intrachain rigidity central to "conventional PIM" design principles is not a singular solution to intrinsic plasticization resistance. Despite the significant intrachain rigidity in TPDA-TMPD, a 300% increase in PMIX(CH4), 50% decrease in α(CO2/CH4) from 24 to 12, and continuous increase in PMIX(CO2) occurred from 4 to 30 bar. On the other hand, the more flexible and densely packed TPDA-6FpDA exhibited a slight upturn in PMIX(CO2) at 20 bar similar to a dense cellulose acetate (CA) film, also reported here, despite a 4-fold higher CO2 sorption capacity. Microstructural investigations suggest that the interconnected O2- and H2-sieving ultramicroporosity of TPDA-TMPD is more sensitive to slight CO2-induced dilations and is the physical basis for a more extensive and accelerated plasticization. Interchain rigidity, potentially by interchain interactions, is emphasized and may be facilitated by intrachain mobility.
dc.description.sponsorshipThe authors acknowledge financial support of this work by KAUST funding for Prof. Ingo Pinnau.
dc.publisherAmerican Chemical Society (ACS)
dc.titleRole of intrachain rigidity in the plasticization of intrinsically microporous triptycene-based polyimide membranes in mixed-Gas CO2/CH4 separations
dc.typeArticle
dc.contributor.departmentAdvanced Membranes and Porous Materials Research Center
dc.contributor.departmentChemical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalMacromolecules
dc.contributor.institutionDepartment of Chemistry, Taibah UniversityMadinah, Saudi Arabia
kaust.personSwaidan, Raja
kaust.personGhanem, Bader
kaust.personLitwiller, Eric
kaust.personPinnau, Ingo
dc.date.published-online2014-10-22
dc.date.published-print2014-11-11


This item appears in the following Collection(s)

Show simple item record