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dc.contributor.authorYadav, Raghvendra Singhcs
dc.contributor.authorAnju,cs
dc.contributor.authorJamatia, Thaiskangcs
dc.contributor.authorKuřitka, Ivocs
dc.contributor.authorVilčáková, Jarmilacs
dc.contributor.authorŠkoda, Davidcs
dc.contributor.authorUrbánek, Pavelcs
dc.contributor.authorMachovský, Michalcs
dc.contributor.authorMasař, Milancs
dc.contributor.authorUrbánek, Michalcs
dc.contributor.authorKalina, Lukášcs
dc.contributor.authorHavlica, Jaromírcs
dc.date.accessioned2021-11-26T07:54:47Z
dc.date.available2021-11-26T07:54:47Z
dc.date.issued2021-04-25cs
dc.identifier.citationNanomaterials. 2021, vol. 11, issue 5, p. 1-25.en
dc.identifier.issn2079-4991cs
dc.identifier.other171346cs
dc.identifier.urihttp://hdl.handle.net/11012/202973
dc.description.abstractSuperparamagnetic ZnFe2O4 spinel ferrite nanoparticles were prepared by the sonochemical synthesis method at different ultra-sonication times of 25 min (ZS25), 50 min (ZS50), and 100 min (ZS100). The structural properties of ZnFe2O4 spinel ferrite nanoparticles were controlled via sonochemical synthesis time. The average crystallite size increases from 3.0 nm to 4.0 nm with a rise of sonication time from 25 min to 100 min. The change of physical properties of ZnFe2O4 nanoparticles with the increase of sonication time was observed. The prepared ZnFe2O4 nanoparticles show superparamagnetic behavior. The prepared ZnFe2O4 nanoparticles (ZS25, ZS50, and ZS100) and reduced graphene oxide (RGO) were embedded in a polyurethane resin (PUR) matrix as a shield against electromagnetic pollution. The ultra-sonication method has been used for the preparation of nanocomposites. The total shielding effectiveness (SET) value for the prepared nanocomposites was studied at a thickness of 1 mm in the range of 8.2–12.4 GHz. The high attenuation constant () value of the prepared ZS100-RGO-PUR nanocomposite as compared with other samples recommended high absorption of electromagnetic waves. The existence of electric-magnetic nanofillers in the resin matrix delivered the inclusive acts of magnetic loss, dielectric loss, appropriate attenuation constant, and effective impedance matching. The synergistic effect of ZnFe2O4 and RGO in the PUR matrix led to high interfacial polarization and, consequently, significant absorption of the electromagnetic waves. The outcomes and methods also assure an inventive and competent approach to develop lightweight and flexible polyurethane resin matrix-based nanocomposites, consisting of superparamagnetic zinc ferrite nanoparticles and reduced graphene oxide as a shield against electromagnetic pollution.en
dc.formattextcs
dc.format.extent1-25cs
dc.format.mimetypeapplication/pdfcs
dc.language.isoencs
dc.publisherMDPIcs
dc.relation.ispartofNanomaterialscs
dc.relation.urihttps://www.mdpi.com/2079-4991/11/5/1112cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectsonochemical synthesisen
dc.subjectspinel ferriteen
dc.subjectnanoparticlesen
dc.subjectnanocompositesen
dc.subjectelectromagnetic interference shieldingen
dc.titleSuperparamagnetic ZnFe2O4 Nanoparticles-Reduced Graphene Oxide-Polyurethane Resin Based Nanocomposites for Electromagnetic Interference Shielding Applicationen
thesis.grantorVysoké učení technické v Brně. Fakulta chemická. Ústav chemie materiálůcs
sync.item.dbidVAV-171346en
sync.item.dbtypeVAVen
sync.item.insts2021.11.26 16:57:03en
sync.item.modts2021.11.26 16:15:10en
dc.coverage.issue5cs
dc.coverage.volume11cs
dc.identifier.doi10.3390/nano11051112cs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2079-4991/cs
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen


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Creative Commons Attribution 4.0 International
Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International