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Electrorheological fluids containing graphene oxide sheets grafted with poly(methyl methacrylate)

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dc.title Electrorheological fluids containing graphene oxide sheets grafted with poly(methyl methacrylate) en
dc.contributor.author Cvek, Martin
dc.contributor.author Mrlík, Miroslav
dc.contributor.author Ilčíková, Markéta
dc.contributor.author Mosnáček, Jaroslav
dc.contributor.author Sedlačík, Michal
dc.relation.ispartof NANOCON 2017 - Conference Proceedings, 9th International Conference on Nanomaterials - Research and Application
dc.identifier.isbn 9788087294819
dc.date.issued 2018
utb.relation.volume 2017-October
dc.citation.spage 111
dc.citation.epage 116
dc.event.title 9th International Conference on Nanomaterials - Research and Application, NANOCON 2017
dc.event.location Brno
utb.event.state-en Czech Republic
utb.event.state-cs Česká republika
dc.event.sdate 2017-10-18
dc.event.edate 2017-10-20
dc.type conferenceObject
dc.language.iso en
dc.publisher TANGER Ltd.
dc.subject electrorheology en
dc.subject steady shear en
dc.subject graphene oxide en
dc.subject surface modification en
dc.subject atom transfer radical polymerization en
dc.description.abstract Electrorheological (ER) fluids are fascinating materials with a wide range of potential applications. However, low performance in electric field and poor sedimentation stability are the most serious limitations for these applications. To reduce the mentioned drawbacks various materials such as graphene were explored. Recent efforts to improve performance of the ER fluids led to the modification of the graphene with polymer substances. Herein, the proposed ER structures are based on the graphene oxide (GO) sheets controllably grafted with poly(methyl methacrylate) (PMMA). The oxygen-containing functional groups introduced by modified Hummers method enabled the immobilization of 2-Bromoisobutyryl bromide onto the GO. The controlled PMMA chain growth was performed by atom transfer radical polymerization resulting in the GO-g-PMMA entities. The reaction process was monitored via nuclear magnetic resonance spectroscopy and gel permeation chromatography. The successful grafting process was confirmed via infrared spectroscopy. Conductivity of the neat GO as well as the fabricated GO-g-PMMA structures was investigated using four-point method, while their reduction was examined via Raman spectroscopy. Such particles were further thoroughly dispersed in silicone oil (SO) and the ER performance of as-prepared ER fluids was investigated. The system containing the GO-g-PMMA exhibited superior dynamic yield stress and higher ER effects as the modified particles were able to develop more rigid field-induced internal structures, due to the enhanced particle conductivity and thus better response to external electric field. The results also showed that the presence of PMMA grafts enhanced the compatibility with SO, which was reflected in substantially improved stability against sedimentation. © 2018 TANGER Ltd. All Rights Reserved. en
utb.faculty University Institute
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1008176
utb.identifier.obdid 43876777
utb.identifier.scopus 2-s2.0-85051847385
utb.identifier.wok 000452823300017
utb.source d-scopus
dc.date.accessioned 2018-08-30T13:31:27Z
dc.date.available 2018-08-30T13:31:27Z
dc.description.sponsorship Grant Agency of the Czech Republic [GJ16-20361Y]; Internal Grant Agency of Tomas Bata University in Zlin [IGA/CPS/2017/004]; Ministry of Education, Youth and Sports of the Czech Republic - Program NPU I [LO1504]; [APVV-15-0545]
dc.rights Attribution 4.0 International
dc.rights.uri http://creativecommons.org/licenses/by/4.0/
dc.rights.access openAccess
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Cvek, Martin
utb.contributor.internalauthor Mrlík, Miroslav
utb.contributor.internalauthor Sedlačík, Michal
utb.wos.affiliation [Cvek, Martin; Mrlik, Miroslav; Sedlacik, Michal] Tomas Bata Univ, Univ Inst, Ctr Polymer Syst, Zlin, Czech Republic; [Cvek, Martin] Tomas Bata Univ, Fac Technol, Polymer Ctr, Zlin, Czech Republic; [Ilcikova, Marketa; Mosnacek, Jaroslav] Slovak Acad Sci, Polymer Inst, Bratislava, Slovakia
utb.scopus.affiliation Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Czech Republic; Polymer Centre, Faculty of Technology, Tomas Bata University in Zlin, Czech Republic; Polymer Institute, Slovak Academy of Sciences, Bratislava, Slovakia
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