INVESTIGADORES
CARRERAS Alejo Cristian
artículos
Título:
Effect of acid treatment on the physico-chemical properties of Nafion 117 membrane
Autor/es:
IRIARTE, DELFINA; ANDRADA, HEBER; MALDONADO OCHOA, SANTIAGO A.; SILVA, O. FERNANDO; VACA CHÁVEZ, FABIÁN; CARRERAS, ALEJO
Revista:
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Año: 2022 vol. 47 p. 21253 - 21260
ISSN:
0360-3199
Resumen:
In this work, the effect on the physico-chemical properties of Nafion 117 membrane due to the treatment with HCl, H2SO4 and HNO3 was studied. Water uptake, crystallinity, proton conductivity and water dynamics were evaluated on treated and non-treated membranes. An increase in the water uptake and conductivity and a decrease in the crystallinity were observed in treated membranes in comparison with the untreated one. The water dynamics, studied by spin-spin NMR relaxometry, suggests that treated membranes have a more uniform channel size distribution. The treatment with HCl and HNO3 showed higher conductivity and water uptake than H2SO4.
