Magnetic nanocomposites based on hydrogenated epoxy resin

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Show simple item record González González, María Martín-Fabiani, Ignacio Baselga Llidó, Juan Pozuelo de Diego, Javier 2017-04-06T11:27:36Z 2017-04-06T11:27:36Z 2012-02-15
dc.identifier.bibliographicCitation Materials Chemistry and Physics, 2012, 132 (2-3), pp. 618-624
dc.identifier.issn 0254-0584
dc.description.abstract A hydrogenated derivative of diglycidylether of bisphenol A (HDGEBA) has been successfully employed to prepare magnetic thermosetting nanocomposites. Magnetite nanoparticles of ≈10 nm modified with oleic acid were synthesized by co-precipitation of ferric and ferrous salts in ammonium solutions. Nanocomposites with amounts up to 5% w w⁻¹ of nanoparticles were dispersed in HDGEBA by co-solvent method and cured with m-xylilendiamine. Both the particles and nanocomposites were characterized by FTIR, DSC, TGA, XRD, TEM, DMTA and VSM. Due to the lower polarity of the hydrogenated resin, the enhanced compatibility with magnetite oleic coverage allowed obtaining good dispersions of the nanoparticles for compositions up 1% w w⁻¹, while at higher concentration agglomerates were observed. Two behaviors in the thermal properties were obtained: for compositions below 1% w w⁻¹ the glass transition temperature increased with the amount of nanoparticles, whereas for higher amounts the glass transition temperature decreased. Superparamagnetic behavior was observed in both the particles and the nanocomposites; the blockage temperature gradually increases with loading but it is lower than the observed for bulk magnetite nanoparticles. This fact reflects that nanoparticle–nanoparticle distances in the nanocomposites gradually decrease with loading which is in accordance with a good dispersion state for low loadings and the presence of aggregates at high loadings.
dc.description.sponsorship This work was supported by grants Dinater (MAT2007-63722), Nacopan (MAT2007-31173-E) and Nanomod (MAT2010-17091) from the Spanish Ministerio de Ciencia e Innovación.
dc.format.extent 7
dc.format.mimetype application/pdf
dc.language.iso eng
dc.publisher Elsevier
dc.rights © Elsevier, 2011
dc.rights Atribución-NoComercial-SinDerivadas 3.0 España
dc.subject.other Nanocomposite
dc.subject.other Magnetite
dc.subject.other Epoxy
dc.title Magnetic nanocomposites based on hydrogenated epoxy resin
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. MAT2007-63722
dc.relation.projectID Gobierno de España. MAT2007-31173-E
dc.relation.projectID Gobierno de España. MAT2010-17091
dc.type.version acceptedVersion
dc.identifier.publicationfirstpage 618
dc.identifier.publicationissue 2-3
dc.identifier.publicationlastpage 624
dc.identifier.publicationtitle Materials Chemistry and Physics
dc.identifier.publicationvolume 132
dc.identifier.uxxi AR/0000009806
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