RT info:eu-repo/semantics/article
T1 Influence of the PEO length in gas separation properties of segregating aromaticaliphatic copoly(ether-imide)s
A1 Tena Matias, Alberto
A1 Marcos Fernández, Ángel
A1 Lozano, Ángel E.
A1 Abajo, Javier de
A1 Palacio Martínez, Laura
A1 Prádanos del Pico, Pedro Lourdes
A1 Hernández Giménez, Antonio
K1 Membranes
K1 Polymers
K1 Separations
K1 Selectivity
K1 Copoly(ether-imide)
K1 Carbon dioxide
AB A complete series of aliphatic-aromatic copoly(ether-imide)s has been synthesized inthis work. All these copoly(ether-imide)s had the same structure, BPDA-PEOX-ODA,but different lengths of PEO in the final polymer. These copolymers have beenthermally treated and characterized by several techniques. A direct relationship betweenthe temperature of treatment, the improvement of phase segregation, and permeabilityhas been demonstrated.The Maxwell model has been applied to predict permeability (for CO2, CH4 and N2) andit has been found that when the segregated PEO can be considered to be amorphous – itis at high temperatures when crystallinity disappears – the model fits reasonably well.This confirms that the aliphatic and aromatic portions of the copolymer behaveapproximately as a bi-phase of disperse domains within a continuous matrix.Results show that permeability is higher when the PEO chains are longer – when thereis no crystallinity, or any kind of internal bonds, distorting the results – while selectivitydoesn´t depend on the PEO length in the copolymer. Remarkable are the results for theCO2/N2 gas pair, with selectivity-versus-permeability very near to the Robeson‘s upperbound at 30 ºC and even in closer proximity to the corresponding trade off line forhigher permeation temperatures.
PB Elsevier
SN ISSN: 0009-2509
YR 2013
FD 2013
LK http://uvadoc.uva.es/handle/10324/21891
UL http://uvadoc.uva.es/handle/10324/21891
LA eng
NO Chemical Engineering Science, 2013, Volume 104, p. 574–585
NO Producción Científica
DS UVaDOC
RD 22-dic-2024