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Magnetorheological fluids based on core-shell carbonyl iron particles modified by various organosilanes: synthesis, stability and performance

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dc.title Magnetorheological fluids based on core-shell carbonyl iron particles modified by various organosilanes: synthesis, stability and performance en
dc.contributor.author Ronzová, Alena
dc.contributor.author Sedlačík, Michal
dc.contributor.author Cvek, Martin
dc.relation.ispartof Soft Matter
dc.identifier.issn 1744-683X Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2021
utb.relation.volume 17
utb.relation.issue 5
dc.citation.spage 1299
dc.citation.epage 1306
dc.type article
dc.language.iso en
dc.publisher Royal Soc Chemistry
dc.identifier.doi 10.1039/d0sm01785j
dc.relation.uri https://pubs.rsc.org/en/content/articlelanding/2021/SM/D0SM01785J#!divAbstract
dc.description.abstract Although smart materials, specifically magnetorheological (MR) fluids, have shown remarkable practical importance, their drawbacks such as an aggregation of magnetic fillers, insufficient compatibility with the carrier liquid, low resistance to corrosion and poor sedimentation stability still cause severe limitations for their broader utilization. To address this challenge, our study presents a facile concept for the coating of magnetic particles, leading to their enhanced utility properties and sufficient MR performance. This concentrates on the coating of magnetic carbonyl iron (CI) particles with a thin modifying layer as a surface shell utilizing four organosilanes; tetraethoxysilane, (3-aminopropyl)triethoxysilane, bis[3(trimethoxysilyl)propyl]amine and vinyltrimethoxysilane. Characterization of the modified particles and their suspensions was examined using various methods. XPS analysis confirmed the successful particle modification, while the surface free energy was evaluated by tensiometric measurements reflecting the better compatibility of particles with the dispersing medium. The lowest surface free energy possessed particles modified with (3-aminopropyl)triethoxysilane. The magnetization of the modified core-shell particles was not negatively affected by the organosilanes layer present on the particles resulting in comparable MR performance of the systems based on pure CI particles and their modified analogues as was proved by the fitting of the corresponding flow curves by the Robertson-Stiff model. Moreover, the modification of the particles improved their thermo-oxidation stability and chemical stability investigated via thermogravimetric analysis and acidic tests, respectively. Finally, the sedimentation stability of the modified particle-based systems expressed as a weight gain measured using a tensiometer device was enhanced in comparison with the pure CI particle-based system, which can be very positive in the intended applications. en
utb.faculty University Institute
utb.faculty Faculty of Technology
utb.faculty Faculty of Applied Informatics
dc.identifier.uri http://hdl.handle.net/10563/1010239
utb.identifier.obdid 43882486
utb.identifier.scopus 2-s2.0-85101433434
utb.identifier.wok 000618043500012
utb.identifier.pubmed 33306080
utb.identifier.coden SMOAB
utb.source J-wok
dc.date.accessioned 2021-03-12T14:35:06Z
dc.date.available 2021-03-12T14:35:06Z
dc.description.sponsorship Ministry of Education, Youth and Sports of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic [RP/CPS/2020/006]; [IGA/CPS/2020/006]
dc.description.sponsorship Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT
utb.ou Centre of Polymer Systems
utb.ou Department of Production Engineering
utb.ou CEBIA-Tech
utb.contributor.internalauthor Ronzová, Alena
utb.contributor.internalauthor Sedlačík, Michal
utb.contributor.internalauthor Cvek, Martin
utb.fulltext.sponsorship The author A. R. would like to thank the project (IGA/CPS/2020/006) for financial support. The authors M. S. and M. C. gratefully acknowledge the project DKRVO (RP/CPS/2020/006) supported by the Ministry of Education, Youth and Sports of the Czech Republic.
utb.wos.affiliation [Ronzova, Alena; Sedlacik, Michal; Cvek, Martin] Tomas Bata Univ Zlin, Ctr Polymer Syst, Univ Inst, Trida T Bati 5678, Zlin 76001, Czech Republic; [Ronzova, Alena; Sedlacik, Michal] Tomas Bata Univ Zlin, Dept Prod Engn, Fac Technol, Vavreckova 275, Zlin 76001, Czech Republic
utb.scopus.affiliation Centre of Polymer Systems, University Institute, Tomas Bata University in Zlín, Trida T. Bati 5678, Zlín, 760 01, Czech Republic; Department of Production Engineering, Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, Zlín, 760 01, Czech Republic
utb.fulltext.projects IGA/CPS/2020/006
utb.fulltext.projects RP/CPS/2020/006
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