Synergistic effect of magnetite nanoparticles and carbon nanofibres in electromagnetic absorbing composites

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Show simple item record Crespo Ribadeneyra, María Méndez, Néstor González González, María Baselga Llidó, Juan Pozuelo de Diego, Javier
dc.contributor.editor Elsevier 2017-04-06T08:09:33Z 2017-04-06T08:09:33Z 2014-03-15
dc.identifier.bibliographicCitation Carbon, 2014, 4, pp. 63-72.
dc.identifier.issn 0008-6223
dc.description.abstract Epoxy composites with different amounts of magnetite nanoparticles, carbon nanofibres (CNF) and magnetite-decorated CNF were prepared and characterized. A simple method for the magnetite CNF decoration was developed by adsorbing preformed oleic acid capped-magnetite nanoparticles over the CNF surface. A synergy between magnetite nanoparticles and CNF was found to have crucial effects in the electromagnetic shielding efficiency of the prepared materials. This effect has been analysed by their electrical conductivity in terms of percolation theory and complex permittivity at high frequencies. Electromagnetic shielding mechanisms (reflection, absorption and transmission) were individually studied in the 1-18 GHz range. Results show that decoration of CNF with magnetite, notably increases permittivity and high-frequency AC conductivity and enhances the electromagnetic shielding efficiency up to around 20 dB at high frequencies. It is proposed that interfacial polarization adds an additional dissipation mechanism that may be responsible for the observed electromagnetic shielding enhancement.
dc.description.sponsorship This work was supported by grants Nacopan (MAT2007-31173-E) and Nanomod (MAT2010-17091) from the Spanish Ministerio de Ciencia e Innovación.
dc.format.extent 10
dc.format.mimetype application/pdf
dc.language.iso eng
dc.rights © Elsevier, 2014
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Interference shielding effectiveness
dc.subject.other Induced tunneling conduction
dc.subject.other Dielectric-properties
dc.subject.other Polymer networks
dc.subject.other Percolation
dc.subject.other Nanotubes
dc.subject.other Permittivity
dc.subject.other Polystyrene
dc.subject.other Absorption
dc.subject.other Mechanisms
dc.title Synergistic effect of magnetite nanoparticles and carbon nanofibres in electromagnetic absorbing composites
dc.type article
dc.subject.eciencia Ingeniería Industrial
dc.subject.eciencia Materiales
dc.subject.eciencia Química
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. MAT2007-31173-E
dc.relation.projectID Gobierno de España. MAT2010-17091
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 63
dc.identifier.publicationlastpage 72
dc.identifier.publicationtitle Carbon
dc.identifier.publicationvolume 74
dc.identifier.uxxi AR/0000015143
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