86139 20200716101547.0 doi 10.1098/rsos.190866 sideral 114915 ART-2019-114915 eng (orcid)0000-0002-0990-0422 Martinez-Izquierdo, Lidia Universidad de Zaragoza Poly(ether-block-amide) copolymer membrane for CO2/N-2 separation: the influence of the casting solution concentration on its morphology, thermal properties and gas separation performance 2019 Access copy available to the general public Unrestricted The present work is focused on the study of the effect that the casting solution concentration has on the morphology and gas separation performance of poly(ether-block-amide) copolymer membranes (Pebax (R) MH 1657). With this aim, three different concentrations of Pebax (R) MH 1657 in the casting solution (1, 3 and 5 wt%) were used to prepare dense membranes with a thickness of 40 mu m. The morphology and thermal stability of all membranes were characterized by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, rotational viscometry and thermogravimetric analyses. An increase in crystallinity was notable when the amount of solvent in the Pebax (R) MH 1657 solution was higher, mainly related to the polymer chains arrangement and the solvent evaporation time. Such characteristic seemed to play a key role in the thermal degradation of the membranes, confirming that the most crystalline materials tend to be thermally more stable than those with lower crystallinity. To study the influence of their morphology and operating temperature on the CO2 separation, gas separation tests were conducted with the gas mixture CO2/N-2. Results indicated that a compromise must be found between the amount of solvent used to prepare the membranes and the crystallinity, in order to reach the best gas separation performance. In this study, the best performance was achieved with the membrane prepared from a 3 wt% casting solution, reaching at 35 degrees C and under a feed pressure of 3 bar, a CO2 permeability of 110 Barrer and a CO2/N-2 selectivity of 36. info:eu-repo/grantAgreement/ES/DGA/T43-17R info:eu-repo/grantAgreement/EC/H2020/760944/EU/Advanced MEMBranes and membrane assisted procEsses for pre- and post- combustion CO2 captuRe/MEMBER This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 760944-MEMBER info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2016-77290-R info:eu-repo/semantics/openAccess by http://creativecommons.org/licenses/by/3.0/es/ 2.647 2019 MULTIDISCIPLINARY SCIENCES 28 / 71 = 0.394 2019 Q2 T2 0.966 2019 Multidisciplinary 2019 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion (orcid)0000-0001-9595-0831 Malankowska, Magdalena Universidad de Zaragoza (orcid)0000-0001-6627-0079 Sanchez-Lainez, Javier Universidad de Zaragoza (orcid)0000-0002-4954-1188 Tellez, Carlos Universidad de Zaragoza (orcid)0000-0003-1512-4500 Coronas, Joaquín Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 6, 9 (2019), 190866 [11 pp.] R. Soc. open sci. Royal Society Open Science 2054-5703 771078 http://zaguan.unizar.es/record/86139/files/texto_completo.pdf Versión publicada 81003 http://zaguan.unizar.es/record/86139/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:86139 articulos driver 2020-07-16-09:43:35 ARTICLE