Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures
The low temperature thermal behavior of Nafion 117 membranes with different water contents and equilibrated with water-methanol mixtures of different concentrations were studied by differential scanning calorimetry (DSC). The DSC curves revealed a weak transition at temperatures below -100 °C, relat...
Autores principales: | , |
---|---|
Publicado: |
2006
|
Materias: | |
Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03787753_v161_n2_p799_Corti http://hdl.handle.net/20.500.12110/paper_03787753_v161_n2_p799_Corti |
Aporte de: |
id |
paper:paper_03787753_v161_n2_p799_Corti |
---|---|
record_format |
dspace |
spelling |
paper:paper_03787753_v161_n2_p799_Corti2023-06-08T15:40:28Z Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures Corti, Horacio Roberto Buera, María del Pilar DMPEM fuel cells Freezing Glass transition temperature Methanol Nafion Water Atmospheric humidity Differential scanning calorimetry Freezing Fuel cells Glass transition Low temperature effects Methanol Thermodynamic properties Water Ice fusion Mechanical dynamics Nafion Polymeric membranes The low temperature thermal behavior of Nafion 117 membranes with different water contents and equilibrated with water-methanol mixtures of different concentrations were studied by differential scanning calorimetry (DSC). The DSC curves revealed a weak transition at temperatures below -100 °C, related to the γ peak reported in mechanical dynamics studies, and associated to the true glass transition temperature of the polymer. The amount of freezable water was determined from the area of the ice fusion peak and it increased from 1 to 23% as the relative humidity increases from 84 to 100%. The presence of methanol in the membrane increased the amount of freezable water up to 65%. © 2006 Elsevier B.V. All rights reserved. Fil:Corti, H.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pilar Buera, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2006 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03787753_v161_n2_p799_Corti http://hdl.handle.net/20.500.12110/paper_03787753_v161_n2_p799_Corti |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
DMPEM fuel cells Freezing Glass transition temperature Methanol Nafion Water Atmospheric humidity Differential scanning calorimetry Freezing Fuel cells Glass transition Low temperature effects Methanol Thermodynamic properties Water Ice fusion Mechanical dynamics Nafion Polymeric membranes |
spellingShingle |
DMPEM fuel cells Freezing Glass transition temperature Methanol Nafion Water Atmospheric humidity Differential scanning calorimetry Freezing Fuel cells Glass transition Low temperature effects Methanol Thermodynamic properties Water Ice fusion Mechanical dynamics Nafion Polymeric membranes Corti, Horacio Roberto Buera, María del Pilar Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures |
topic_facet |
DMPEM fuel cells Freezing Glass transition temperature Methanol Nafion Water Atmospheric humidity Differential scanning calorimetry Freezing Fuel cells Glass transition Low temperature effects Methanol Thermodynamic properties Water Ice fusion Mechanical dynamics Nafion Polymeric membranes |
description |
The low temperature thermal behavior of Nafion 117 membranes with different water contents and equilibrated with water-methanol mixtures of different concentrations were studied by differential scanning calorimetry (DSC). The DSC curves revealed a weak transition at temperatures below -100 °C, related to the γ peak reported in mechanical dynamics studies, and associated to the true glass transition temperature of the polymer. The amount of freezable water was determined from the area of the ice fusion peak and it increased from 1 to 23% as the relative humidity increases from 84 to 100%. The presence of methanol in the membrane increased the amount of freezable water up to 65%. © 2006 Elsevier B.V. All rights reserved. |
author |
Corti, Horacio Roberto Buera, María del Pilar |
author_facet |
Corti, Horacio Roberto Buera, María del Pilar |
author_sort |
Corti, Horacio Roberto |
title |
Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures |
title_short |
Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures |
title_full |
Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures |
title_fullStr |
Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures |
title_full_unstemmed |
Low temperature thermal properties of Nafion 117 membranes in water and methanol-water mixtures |
title_sort |
low temperature thermal properties of nafion 117 membranes in water and methanol-water mixtures |
publishDate |
2006 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03787753_v161_n2_p799_Corti http://hdl.handle.net/20.500.12110/paper_03787753_v161_n2_p799_Corti |
work_keys_str_mv |
AT cortihoracioroberto lowtemperaturethermalpropertiesofnafion117membranesinwaterandmethanolwatermixtures AT bueramariadelpilar lowtemperaturethermalpropertiesofnafion117membranesinwaterandmethanolwatermixtures |
_version_ |
1768546495464734720 |