77237 20190709135427.0 doi 10.1021/acsami.7b01916 sideral 99019 ART-2017-99019 eng Kallem, P. Hierarchical Porous Polybenzimidazole Microsieves: An Efficient Architecture for Anhydrous Proton Transport via Polyionic Liquids 2017 Access copy available to the general public Unrestricted Liquid-induced phase-separation micromolding (LIPSµM) has been successfully used for manufacturing hierarchical porous polybenzimidazole (HPBI) microsieves (42-46% porosity, 30-40 µm thick) with a specific pore architecture (pattern of macropores: ~9 µm in size, perforated, dispersed in a porous matrix with a 50-100 nm pore size). Using these microsieves, proton-exchange membranes were fabricated by the infiltration of a 1H-3-vinylimidazolium bis(trifluoromethanesulfonyl)imide liquid and divinylbenzene (as a cross-linker), followed by in situ UV polymerization. Our approach relies on the separation of the ion conducting function from the structural support function. Thus, the polymeric ionic liquid (PIL) moiety plays the role of a proton conductor, whereas the HPBI microsieve ensures the mechanical resistance of the system. The influence of the porous support architecture on both proton transport performance and mechanical strength has been specifically investigated by means of comparison with straight macroporous (36% porosity) and randomly nanoporous (68% porosity) PBI counterparts. The most attractive results were obtained with the poly[1-(3H-imidazolium)ethylene]bis(trifluoromethanesulfonyl)imide PIL cross-linked with 1% divinylbenzene supported on HPBI membranes with a 21-µm-thick skin layer, achieving conductivity values up to 85 mS cm-1 at 200 °C under anhydrous conditions and in the absence of mineral acids. info:eu-repo/grantAgreement/ES/DGA/EU-EACEA/SGA2012-1719 info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 8.097 2017 NANOSCIENCE & NANOTECHNOLOGY 15 / 92 = 0.163 2017 Q1 T1 MATERIALS SCIENCE, MULTIDISCIPLINARY 26 / 285 = 0.091 2017 Q1 T1 2.784 2017 Materials Science (miscellaneous) 2017 Q1 Nanoscience and Nanotechnology 2017 Q1 Medicine (miscellaneous) 2017 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Drobek, M. Julbe, A. Vriezekolk, E.J. (orcid)0000-0002-4758-9380 Mallada, R. Universidad de Zaragoza (orcid)0000-0001-9897-6527 Pina, M.P. Universidad de Zaragoza 5005 555 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Ingeniería Química 9, 17 (2017), 14844-14857 ACS appl. mater. interfaces ACS Applied Materials & Interfaces 1944-8244 3825490 http://zaguan.unizar.es/record/77237/files/texto_completo.pdf Postprint 50681 http://zaguan.unizar.es/record/77237/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:77237 articulos driver 2019-07-09-11:30:28 ARTICLE