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Effects of Gamma Irradiation on the Kinetics of the Adsorption and Desorption of Hydrogen in Carbon Microfibres

AuthorsMota, César; Culebras, Mario; Cantarero, Andrés; Madroñero de la Cal, Antonio; Gómez, Clara M.; Amo, José M.; Robla, J. I.
KeywordsElectrical Resistivity
Hydrogen Adsorption
Raman Spectroscopy
Gamma Irradiation
Carbon Fiber
Issue Date2013
PublisherScientific Research Publishing
CitationAdvances in Materials Physics and Chemistry 3 (2): 153-160 (2013)
AbstractIn this study, three types of carbon fibres were used, they were ex-polyacrylonitrile carbon fibres with high bulk modulus, ex-polyacrylonitrile fibres with high strength, and vapour grown carbon fibres. All the samples were subjected to a hydrogen adsorption process at room temperature in an over-pressured atmosphere of 25 bars. The adsorption process was monitored through electrical resistivity measurements. As conditioning of the fibres, a chemical activation by acid etching followed by ¿-ray irradiation with 60Co radioisotopes was performed. The surface energy was deter-mined by means of the sessile drop test. Both conditioning treatments are supplementary; the chemical activation works on the outer surface and the ¿-irradiation works in the bulk material as well. Apparently, the most significant parameter for hydrogen storage is the crystallite size. From this point of view, the most
Identifiersdoi: 10.4236/ampc.2013.32021
issn: 2162-531X
Appears in Collections:(CENIM) Artículos
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