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Novel synthesis of core-shell urchin-like ZnO coated carbonyl iron microparticles and their magnetorheological activity

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dc.title Novel synthesis of core-shell urchin-like ZnO coated carbonyl iron microparticles and their magnetorheological activity en
dc.contributor.author Machovský, Michal
dc.contributor.author Mrlík, Miroslav
dc.contributor.author Kuřitka, Ivo
dc.contributor.author Pavlínek, Vladimír
dc.contributor.author Babayan, Vladimír Artur
dc.relation.ispartof RSC Advances
dc.identifier.issn 2046-2069 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2014
utb.relation.volume 4
utb.relation.issue 2
dc.citation.spage 996
dc.citation.epage 1003
dc.type article
dc.language.iso en
dc.publisher Royal Society of Chemistry (RSC) en
dc.identifier.doi 10.1039/c3ra44982c
dc.relation.uri http://pubs.rsc.org/en/content/articlelanding/2014/ra/c3ra44982c#!divAbstract
dc.description.abstract The overall stability (thermo-oxidation, sedimentation) of MR suspensions is a crucial problem decreasing their potential applicability in real life. In this study the unique functional coating of carbonyl iron (CI) particles with ZnO structures was presented in order to develop a new MR suspension based on the core-shell ZnO/CI urchin-like dispersed particles. The two-step synthesis provides the suitable core-shell particles with improved sedimentation and also thermo-oxidation stability. Moreover, due to the enhanced sedimentation stability core-shell based suspensions exhibit higher values of the yield stress than those of bare CI based suspensions at 20 wt% particle concentration. The suspension with 60 wt% particle concentration reaches values of the yield stress around 2.2 kPa at 272 mT. The excellent MR efficiency of the core-shell ZnO/CI based suspension at elevated temperatures was observed. Finally, the dimorphic particle based suspension was prepared when the ratio between the carbonyl iron and core-shell urchin-like particles was 1:1. The highest yield stress was obtained in the case of a dimorphic particle-based suspension due to the good magnetic properties of the bare carbonyl iron and mechanical gripping between core-shell ZnO/CI urchin-like particles. This journal is © The Royal Society of Chemistry 2014. en
utb.faculty University Institute
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1003587
utb.identifier.obdid 43871554
utb.identifier.scopus 2-s2.0-84889584901
utb.identifier.wok 000327849700065
utb.identifier.coden RSCAC
utb.source j-scopus
dc.date.accessioned 2013-12-30T12:31:16Z
dc.date.available 2013-12-30T12:31:16Z
dc.rights.access openAccess
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Machovský, Michal
utb.contributor.internalauthor Mrlík, Miroslav
utb.contributor.internalauthor Kuřitka, Ivo
utb.contributor.internalauthor Pavlínek, Vladimír
utb.contributor.internalauthor Babayan, Vladimír Artur
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