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A facile controllable coating of carbonyl iron particles with poly(glycidyl methacrylate): A tool for adjusting MR response and stability properties

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dc.title A facile controllable coating of carbonyl iron particles with poly(glycidyl methacrylate): A tool for adjusting MR response and stability properties en
dc.contributor.author Cvek, Martin
dc.contributor.author Mrlík, Miroslav
dc.contributor.author Ilčíková, Markéta
dc.contributor.author Plachý, Tomáš
dc.contributor.author Sedlačík, Michal
dc.contributor.author Mosnáček, Jaroslav
dc.contributor.author Pavlínek, Vladimír
dc.relation.ispartof Journal of Materials Chemistry C
dc.identifier.issn 2050-7526 OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 3
utb.relation.issue 18
dc.citation.spage 4646
dc.citation.epage 4656
dc.type article
dc.language.iso en
dc.publisher Royal Society of Chemistry (RSC)
dc.identifier.doi 10.1039/c5tc00319a
dc.relation.uri http://pubs.rsc.org/en/Content/ArticleLanding/2015/TC/C5TC00319A#!divAbstract
dc.description.abstract This study is focused on the controllable coating of the carbonyl iron (CI) particles widely applied in magnetorheology. These particles were grafted with poly(glycidyl methacrylate) (PGMA) with narrow polydispersity via surface-initiated atom transfer radical polymerization. Two types of core-shell particles differing in molecular weights of grafted polymer chains were synthesized. The effect of shell thickness on the thermo-oxidation stability of particles as well as the sedimentation stability of their silicone oil suspensions was evaluated. The successful coating process was confirmed by Fourier transform infrared spectroscopy and energy-dispersive spectrometry. The differences in the magnetic properties of bare and coated CI particles were clarified through vibrating sample magnetometry. Due to the controllable length of the PGMA grafts, the magnetic properties remain almost the same as those for bare CI. The magnetorheological (MR) behavior of silicone oil suspensions containing 60 wt% of bare CI particles as well as PGMA-coated analogues was investigated in the absence and in the presence of various magnetic field strengths, demonstrating the negligible impact of surface modification on final MR performance. Thus, the grafting of the particles with PGMA negligibly affected magnetic properties but considerably enhanced thermo-oxidation and sedimentation stabilities. Finally, a novel tensiometric method for sedimentation stability measurements of MR suspensions was successfully implemented. This journal is © The Royal Society of Chemistry. en
utb.faculty University Institute
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1004590
utb.identifier.rivid RIV/70883521:28610/15:43873033!RIV16-MSM-28610___
utb.identifier.obdid 43873453
utb.identifier.scopus 2-s2.0-84929484358
utb.identifier.wok 000353768100007
utb.identifier.coden JMCCC
utb.source j-scopus
dc.date.accessioned 2015-06-02T08:12:54Z
dc.date.available 2015-06-02T08:12:54Z
dc.description.sponsorship specific university research resources [IGA/FT/2014/017]; Grant Agency of the Czech Republic [14-32114P]; Operational Program Research and Development for Innovations; European Regional Development Fund (ERDF); National Budget of Czech Republic [CZ.1.05/2.1.00/03.0111]; Centre of Excellence FUN-MAT
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Cvek, Martin
utb.contributor.internalauthor Mrlík, Miroslav
utb.contributor.internalauthor Plachý, Tomáš
utb.contributor.internalauthor Sedlačík, Michal
utb.contributor.internalauthor Pavlínek, Vladimír
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