Mostrar el registro sencillo del ítem

dc.contributor.author
Díaz, Liliana Alicia  
dc.contributor.author
Abuin, Graciela Carmen  
dc.contributor.author
Corti, Horacio Roberto  
dc.date.available
2023-03-10T10:22:48Z  
dc.date.issued
2012-04  
dc.identifier.citation
Díaz, Liliana Alicia; Abuin, Graciela Carmen; Corti, Horacio Roberto; Methanol sorption and permeability in Nafion and acid-doped PBI and ABPBI membranes; Elsevier Science; Journal of Membrane Science; 411-412; 4-2012; 35-44  
dc.identifier.issn
0376-7388  
dc.identifier.uri
http://hdl.handle.net/11336/190135  
dc.description.abstract
Methanol permeability in phosphoric acid-doped membranes based in poly[2,2'-(m-phenylene)-5,5'-bibenzimidazole] (PBI) and poly[2,5-benzimidazole] (ABPBI), prepared by two different casting procedures, were measured using a diffusion cell in the temperature range from 20 to 90°C, along with the electrical conductivity at 30 and 60°C. The permeability results, the first reported for ABPBI membranes, were compared to commercial Nafion 117 and commercial crosslinked ABPBI and correlated with differences in water and methanol sorption behavior of these materials, determined using a quartz crystal microbalance (QCM) on ultra-thin films (<100nm). Methanol partition constant was calculated from 1H NMR analysis of the membrane desorption products in heavy water. The performance of ABPBI as methanol barrier is poorer than PBI, but it is more than one order of magnitude less permeable to methanol than Nafion ® 117 all over the temperature range. The commercial ABPBI membrane has slightly lower permeability than the ABPBI membrane obtained by high-temperature casting, indicating that an optimized casting procedure could be more efficient than crosslinking to reduce methanol crossover. The combination of low methanol uptake, high proton conductivity and, mainly, low methanol permeability make ABPBI membranes attractive as proton exchange membranes in direct methanol fuel cells.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Elsevier Science  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
ABPBI  
dc.subject
CONDUCTIVITY  
dc.subject
DMFC  
dc.subject
METHANOL  
dc.subject
NAFION  
dc.subject
PBI  
dc.subject
PERMEABILITY  
dc.subject
SORPTION  
dc.subject.classification
Físico-Química, Ciencia de los Polímeros, Electroquímica  
dc.subject.classification
Ciencias Químicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Methanol sorption and permeability in Nafion and acid-doped PBI and ABPBI membranes  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2023-03-09T14:38:37Z  
dc.journal.volume
411-412  
dc.journal.pagination
35-44  
dc.journal.pais
Países Bajos  
dc.journal.ciudad
Amsterdam  
dc.description.fil
Fil: Díaz, Liliana Alicia. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Instituto Nacional de Tecnología Industrial; Argentina  
dc.description.fil
Fil: Abuin, Graciela Carmen. Instituto Nacional de Tecnología Industrial; Argentina  
dc.description.fil
Fil: Corti, Horacio Roberto. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina  
dc.journal.title
Journal of Membrane Science  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/abs/pii/S0376738812003134  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.memsci.2012.04.013