RT info:eu-repo/semantics/article
T1 On the influence of the proportion of PEO in thermally controlled phase segregation of copoly(ether-imide)s for gas separation
A1 Tena Matias, Alberto
A1 Marcos Fernández, Ángel
A1 Palacio Martínez, Laura
A1 Prádanos del Pico, Pedro Lourdes
A1 Lozano, Ángel E.
A1 Abajo, Javier de
A1 Hernández Giménez, Antonio
K1 Copoly(ether-imide) membrane
K1 Thermal treatment
K1 Gas separation
AB A complete series of aliphatic aromatic copoly(etherimide)s, based on an aromatic dianhydride (BPDA),an aromatic diamine (ODA) and a diamino terminated poly(ethylene oxide) (PEO2000) of 2000 g/molmolecular weight, using different PEO contents, has been synthesized. Cast films of these copolymershave been thermally treated and characterized by FTIR-ATR, DSC, TGA and SAXS. It has been foundthat there is a direct relationship between phase segregation and permeability for increasing treatmenttemperatures.Results show that permeability is higher when PEO content increases in the copolymer. Selectivity forO2/N2 and CO2/CH4 gas pairs follows the same tendency, while those for CO2/N2, and CH4/N2 give higherselectivities for intermediate (30-40 %) PEO contents. Especially promising are the results for these twopairs of gases because materials with high permeability with high selectivity can be obtained.The Maxwell model has been applied to predict permeability (for CO2, CH4, O2 and N2) from known datafor pure BPDA-ODA and neat PEO and it has been found that assuming PEO as the dispersed phase, theuse of this equation is adequate for percentages up to approximately a 40 % over which we should assumethat it is the aromatic part of the copolymer which plays the role of dispersed phase.
PB Elsevier
SN 0376-7388
YR 2013
FD 2013
LK http://uvadoc.uva.es/handle/10324/21894
UL http://uvadoc.uva.es/handle/10324/21894
LA eng
NO Journal of Membrane Science, 2013, Volume 434, p. 26–34
NO Producción Científica
DS UVaDOC
RD 22-nov-2024