RT info:eu-repo/semantics/article
T1 Thermally rearranged mixed matrix membranes from copoly(o-hydroxyamide)s and copoly(o-hydroxyamide-amide)s with a porous polymer Network as a filler—A comparison of their gas separation performances
A1 Soto Guzmán, Marvelia Cenit
A1 Comesaña Gándara, Bibiana
A1 Marcos Fernández, Ángel
A1 Cuadrado Curto, María Purificación
A1 Palacio Martínez, Laura
A1 Lozano, Ángel E.
A1 Álvarez, Cristina
A1 Prádanos del Pico, Pedro Lourdes
A1 Hernández Giménez, Antonio
K1 CO2 separation
K1 Gas separation membranes
K1 Gases - Separation
K1 Mixed matrix membranes
K1 Membranas (Tecnología)
K1 Polymers
K1 Polymer networks
K1 Polímeros y polimerización
K1 Chemical engineering
K1 2206.10 Polímeros
K1 3303 Ingeniería y Tecnología Químicas
AB Copoly(o-hydroxyamide)s (HPA) and copoly(o-hydroxyamide-amide)s (PAA) have been synthesized to be used as continuous phases in mixed matrix membranes (MMMs). These polymeric matrices were blended with different loads (15 and 30 wt.%) of a relatively highly microporous porous polymer network (PPN). SEM images of the manufactured MMMs exhibited good compatibility between the two phases for all the membranes studied, and their mechanical properties have been shown to be good enough even after thermal treatment. The WAX results show that the addition of PPN as a filler up to 30% does not substantially change the intersegmental distance and the polymer packing. It seems that, for all the membranes studied, the free volume that determines gas transport is in the high end of the possible range. This means that gas flow occurs mainly between the microvoids in the polymer matrix around the filler. In general, both HPA- and PAA-based MMMs exhibited a notable improvement in gas permeability, due to the presence of PPN, for all gases tested, with an almost constant selectivity. In summary, although the thermal stability of the PAA is limited by the thermal stability of the polyamide side chain, their mechanical properties were better. The permeability was higher for the PAA membranes before their thermal rearrangement, and these values increased after the addition of moderate amounts of PPN.
PB MDPI
SN 2077-0375
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/61580
UL https://uvadoc.uva.es/handle/10324/61580
LA eng
NO Membranes, 2022, Vol. 12, Nº. 10, 998
NO Producción Científica
DS UVaDOC
RD 04-dic-2024