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Graphene oxide modified by betaine moieties for improvement of electrorheological performance

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dc.title Graphene oxide modified by betaine moieties for improvement of electrorheological performance en
dc.contributor.author Ilčíková, Markéta
dc.contributor.author Mrlík, Miroslav
dc.contributor.author Babayan, Vladimír Artur
dc.contributor.author Kasák, Peter
dc.relation.ispartof RSC Advances
dc.identifier.issn 2046-2069 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 5
utb.relation.issue 71
dc.citation.spage 57820
dc.citation.epage 57827
dc.type article
dc.language.iso en
dc.publisher Royal Society of Chemistry (RSC)
dc.identifier.doi 10.1039/c5ra08403b
dc.relation.uri http://pubs.rsc.org/en/Content/ArticleLanding/2015/RA/C5RA08403B#!divAbstract
dc.description.abstract Novel graphene oxide bearing betaine moieties as sulfobetaine (GO-SB), carboxybetaine (GO-CB) and carboxybetaine ester (GO-CBE) moieties were prepared in two simple fabrication processes based on silanization and a thiol-ene click-reaction. Betaine modified particles showed appropriate electrical conductivity for electrorheological applications and the electrorheological behavior was confirmed by on-line microscopic observation. Analysis of the dielectric data using the Havriliak-Negami model showed that the suspension bearing the carboxybetaine ester moiety (GO-CBE) in silicone oil had the highest dielectric relaxation strength and fastest relaxation time due to enhanced charge transfer caused by a specific carboxybetaine ester feature. Analysis of the rheological data of the prepared suspensions at various external fields by the power-law model revealed that the conductivity mechanism is responsible for the electrorheological effect. Development of the internal structures was considerably improved for the GO-CBE sample with a yield stress up to 97 Pa at 5 wt% GO-CBE particles in suspension. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1005280
utb.identifier.rivid RIV/70883521:28610/15:43873012!RIV16-MSM-28610___
utb.identifier.obdid 43873432
utb.identifier.scopus 2-s2.0-84936980448
utb.identifier.wok 000357805500068
utb.identifier.coden RSCAC
utb.source j-wok
dc.date.accessioned 2015-08-28T12:05:01Z
dc.date.available 2015-08-28T12:05:01Z
dc.description.sponsorship NPRP grant from the Qatar National Research Fund (Qatar Foundation) [NPRP-6-381-1-078]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Babayan, Vladimír Artur
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