2026-04-28T19:51:49Zhttps://uvadoc.uva.es/oai/request
oai:uvadoc.uva.es:10324/607382025-01-30T10:35:11Zcom_10324_1186com_10324_931com_10324_894col_10324_1404
UVaDOC author Soto Guzmán, Marvelia Cenit author Carmona Del Rio, Francisco Javier author Freeman, Benny D. author Palacio Martínez, Laura author González Ortega, Alfonso author Prádanos del Pico, Pedro Lourdes author Lozano, Ángel E. author Hernández Giménez, Antonio 2023-08-21T08:25:42Z 2023-08-21T08:25:42Z 2022 Polymers, 2022, Vol. 14, Nº. 15, 3176 2073-4360 https://uvadoc.uva.es/handle/10324/60738 10.3390/polym14153176 3176 15 Polymers 14 2073-4360 A set of thermally rearranged mixed matrix membranes (TR-MMMs) was manufactured and tested for gas separation. These membranes were obtained through the thermal treatment of a precursor MMM with a microporous polymer network and an o-hydroxypolyamide,(HPA) created through a reaction of 2,2-bis(3-amino-4-hydroxyphenyl)-hexafluoropropane (APAF) and 5′-terbutil-m-terfenilo-3,3″-dicarboxylic acid dichloride (tBTmCl). This HPA was blended with different percentages of a porous polymer network (PPN) filler, which produced gas separation MMMs with enhanced gas permeability but with decreased selectivity. The thermal treatment of these MMMs gave membranes with excellent gas separation properties that did not show the selectivity decreasing trend. It was observed that the use of the PPN load brought about a small decrease in the initial mass losses, which were lower for increasing PPN loads. Regarding the glass transition temperature, it was observed that the use of the filler translated to a slightly lower Tg value. When these MMMs and TR-MMMs were compared with the analogous materials created from the isomeric 5′-terbutil-m-terfenilo-4,4″-dicarboxylic acid dichloride (tBTpCl), the permeability was lower for that of tBTmCl, compared with the one from tBTpCl, although selectivity was quite similar. This fact could be attributed to a lower rigidity as roughly confirmed by the segmental length of the polymer chain as studied by WAXS. A model for FFV calculation was proposed and its predictions compared with those evaluated from density measurements assuming a matrix-filler interaction or ideal independence. It turns out that permeability as a function of FFV for TR-MMMs follows an interaction trend, while those not thermally treated follow the non-interaction trend until relatively high PPN loads were reached. eng Atribución 4.0 Internacional Hydrogen Inorganic Chemistry Gas separation membranes Gases - Separation Membranas (Tecnología) Polimers Polímeros y polimerización Polymer networks Free volume and permeability of mixed matrix membranes made from a Terbutil-M-terphenyl polyamide and a porous polymer network info:eu-repo/semantics/article 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URL https://uvadoc.uva.es/bitstream/10324/60738/1/Free-Volume-and-Permeability-of-Mixed-Matrix-Membranes.pdf File MD5 8fa6bb54371d00ec58507c58ab975978 4768408 application/pdf Free-Volume-and-Permeability-of-Mixed-Matrix-Membranes.pdf