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Abstract:

The mechanical properties of polybenzimidazole (PBI) and poly [2,5-benzimidazole] (ABPBI) membranes, possible candidates to replace Nafion as proton exchange membranes in direct methanol fuel cells (DMFC), were studied. It was observed by AFM imaging that the morphology of the ABPBI membranes strongly depends on the casting procedure, performed at high temperature from methanesulphonic acid and at low temperature from formic acid. The elastic moduli of the undoped and phosphoric acid doped membranes were determined using the AFM force spectroscopy technique and the differences observed with doped and undoped PBI and Nafion membranes, were discussed in terms of the electrostatic and swelling forces between polymer chains. The analysis of the force curves indicates differences in the mechanical behavior of doped PBI and ABPBI membranes compared to Nafion, which could have practical consequences on the stability of the membrane electrode assemblies. © 2009 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation
Autor:Franceschini, E.A.; Corti, H.R.
Filiación:Departamento de Física de Materia Condensada, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica (CNEA), 1650 San Martín, Buenos Aires, Argentina
Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE), Facultad de Ciencias Exactas y Naturales, Pabellon II, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:AFM; Elastic modulus; Fuel cells; Membranes; Nafion; Polybenzimidazole; Atomic force microscopy; Biomechanics; Electrochemistry; Formic acid; Fuel cells; Ion exchange membranes; Mechanical properties; Methanol; Methanol fuels; Organic acids; Phosphoric acid; AFM; Afm imaging; Benzimidazole; Elastic properties; Force curves; Force spectroscopies; High temperatures; Low temperatures; Mechanical behaviors; Membrane electrode assemblies; Methanesulphonic acids; Nafion; Nafion membranes; Nano indentations; Polybenzimidazole; Polymer chains; Proton exchange membranes; Swelling forces; Elastic moduli
Año:2009
Volumen:188
Número:2
Página de inicio:379
Página de fin:386
DOI: http://dx.doi.org/10.1016/j.jpowsour.2008.12.019
Título revista:Journal of Power Sources
Título revista abreviado:J Power Sources
ISSN:03787753
CODEN:JPSOD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03787753_v188_n2_p379_Franceschini

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Citas:

---------- APA ----------
Franceschini, E.A. & Corti, H.R. (2009) . Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation. Journal of Power Sources, 188(2), 379-386.
http://dx.doi.org/10.1016/j.jpowsour.2008.12.019
---------- CHICAGO ----------
Franceschini, E.A., Corti, H.R. "Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation" . Journal of Power Sources 188, no. 2 (2009) : 379-386.
http://dx.doi.org/10.1016/j.jpowsour.2008.12.019
---------- MLA ----------
Franceschini, E.A., Corti, H.R. "Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation" . Journal of Power Sources, vol. 188, no. 2, 2009, pp. 379-386.
http://dx.doi.org/10.1016/j.jpowsour.2008.12.019
---------- VANCOUVER ----------
Franceschini, E.A., Corti, H.R. Elastic properties of Nafion, polybenzimidazole and poly [2,5-benzimidazole] membranes determined by AFM tip nano-indentation. J Power Sources. 2009;188(2):379-386.
http://dx.doi.org/10.1016/j.jpowsour.2008.12.019