Piperazinium-mediated crosslinked polyimide-polydimethylsiloxane (PI-PDMS) copolymer membranes: the effect of PDMS content on CO(2) separation

We synthesized copolymers consisting mostly of physically stable rigid polyimide (PI) and a low content of highly permeable rubbery polydimethylsiloxane (PDMS), that were crosslinked by CO(2)-philic ionic piperazinium groups attached to the side chains of the copolymers. These crosslinked copolymers...

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Detalles Bibliográficos
Autores principales: You, Hyelim, Hossain, Iqubal, Kim, Tae-Hyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2018
Materias:
Chemistry
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9077095/
https://www.ncbi.nlm.nih.gov/pubmed/35540897
http://dx.doi.org/10.1039/c7ra10949k
Descripción
Sumario:We synthesized copolymers consisting mostly of physically stable rigid polyimide (PI) and a low content of highly permeable rubbery polydimethylsiloxane (PDMS), that were crosslinked by CO(2)-philic ionic piperazinium groups attached to the side chains of the copolymers. These crosslinked copolymers (xPI-PDMSs) were fashioned into membranes that showed very high levels of thermochemical stability and excellent CO(2) separation performance (P(CO(2)) of 799 Barrer and CO(2)/N(2) permselectivity of 15.7). The inclusion of the piperazinium groups not only endowed these xPI-PDMS membranes with increased selectivity for CO(2), but also good resistance to CO(2) plasticization. The effect of PDMS content on morphology and CO(2) separation properties of xPI-PDMS was also investigated.

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