Polymers of intrinsic microporosity containing aryl-phthalimide moieties: synthesis, modeling, and membrane gas transport properties

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dc.contributor.authorRodriguez-Gonzalez, Fidel E.
dc.contributor.authorSoto, Cenit
dc.contributor.authorPalacio, Laura
dc.contributor.authorMontero-Alejo, Ana L.
dc.contributor.authorEscalona, Nestor
dc.contributor.authorSchott, Eduardo
dc.contributor.authorComesana-Gandara, Bibiana
dc.contributor.authorTerraza, Claudio A.
dc.contributor.authorTundidor-Camba, Alain
dc.date.accessioned2025-01-20T20:14:38Z
dc.date.available2025-01-20T20:14:38Z
dc.date.issued2023
dc.description.abstractHigh-performance polymers for membrane gas separation require the careful design of the structure-porous relationship. In this work, five phthalimide-based polymers of intrinsic microporosity (PIMs) were obtained via the double nucleophilic aromatic substitution with the commercially available 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethylspirobisindane (TTSBI) monomer. The phthalimide monomers were synthesized considering different sizes and positions of the alkyl-substituents to evaluate their influence on the physical properties of the polymers and their potential use as gas separation membranes. Four polymers were soluble in the low-boiling solvents chloroform and tetrahydrofuran, facilitating the casting of self-standing films to evaluate their gas separation properties. The thermally stable membranes showed 5% weight lost between 537 ? and 549 ?. As powders, these four polymers showed apparent BET surface areas ranging from 434 to 661 m(2) g(-1). The experimental BET surface areas correlated with those obtained by molecular simulation models of the synthesized polymers. A linear function is proposed as a tool to predict, with a known uncertainty, the surface area values of this type of polymer from the corresponding computational models. As a trend, increasing the volume of the ortho-substituent in the aryl-phthalimide group increases the permeability of the membranes, reaching generally better performances than Matrimid (R) and close to those of PIM-1, considering their place on the Robeson diagrams of the O-2/N-2, CO2/CH4 and CO2/N-2 gas pairs. Aging studies between 63 and 122 days showed a decrease in permeability, accompanied by the typical increase in selectivity that tends to move the data parallel to the upper Robeson limits.
dc.fuente.origenWOS
dc.identifier.doi10.1039/d2py01584f
dc.identifier.eissn1759-9962
dc.identifier.issn1759-9954
dc.identifier.urihttps://doi.org/10.1039/d2py01584f
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/92210
dc.identifier.wosidWOS:000979110200001
dc.issue.numero19
dc.language.isoen
dc.pagina.final2373
dc.pagina.inicio2363
dc.revistaPolymer chemistry
dc.rightsacceso restringido
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titlePolymers of intrinsic microporosity containing aryl-phthalimide moieties: synthesis, modeling, and membrane gas transport properties
dc.typeartículo
dc.volumen14
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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