RT info:eu-repo/semantics/article
T1 Gas separation membranes obtained by partial pyrolysis of polyimides exhibiting polyethylene oxide moieties
A1 Matesanz Niño, Laura
A1 Aguilar Lugo, Carla
A1 Prádanos del Pico, Pedro Lourdes
A1 Hernández Giménez, Antonio
A1 Bartolomé Albistegui, María del Camino
A1 Campa, José G. de la
A1 Palacio Martínez, Laura
A1 González Ortega, Alfonso
A1 Galizia, Michele
A1 Álvarez, Cristina
A1 Lozano, Ángel E.
K1 Polyimides
K1 Thermal cross-linking
K1 Gas separation
K1 Poliamidas
K1 Reticulación térmica
K1 23 Química
AB Aromatic copolyimides (PIx) and aromatic-aliphatic copolyimides (PIxEOy) were synthesized by reacting 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) with mixtures obtained from 2,2′-bis(4-aminophenyl)hexafluoropropane (6FpDA), 5-diaminobenzoic acid (DABA) and Jeffamine ED-2003 (PEO).The selective thermal removal of PEO from PIxEOy yielded membranes with high thermal stability and good mechanical properties. The presence of carboxylic groups minimized the shrinkage during the cross-linking process. The membranes containing 10 mol% DABA exhibited good O2/N2 and CO2/CH4 separation performance, and resistance to CO2 plasticization.PIx/PIxEOy blends containing less than 10 wt% PEO were prepared. The CO2/CH4 selectivity/permeability balance of cross-linked membranes largely exceeded that of PIx.The results highlight a possible strategy for using analogous cross-linkable polymers exhibiting ethylene oxide moieties as mere additive to prepare high free volume polyimide's membranes, exhibiting enhanced separation properties and high resistance to plasticization.
PB Elsevier
SN 0032-3861
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/59443
UL https://uvadoc.uva.es/handle/10324/59443
LA eng
NO Polymer Volume 247, 28 April 2022, 124789
NO Producción Científica
DS UVaDOC
RD 12-jul-2024