Kontaktujte nás | Jazyk: čeština English
dc.title | Iron-sepiolite magnetorheological fluids with improved performances | en |
dc.contributor.author | Marins, Jéssica Alves | |
dc.contributor.author | Plachý, Tomáš | |
dc.contributor.author | Kuzhir, Pavel | |
dc.relation.ispartof | Journal of Rheology | |
dc.identifier.issn | 0148-6055 Scopus Sources, Sherpa/RoMEO, JCR | |
dc.date.issued | 2019 | |
utb.relation.volume | 63 | |
utb.relation.issue | 1 | |
dc.citation.spage | 125 | |
dc.citation.epage | 139 | |
dc.type | article | |
dc.language.iso | en | |
dc.publisher | Society of Rheology | |
dc.identifier.doi | 10.1122/1.5048051 | |
dc.relation.uri | https://sor.scitation.org/doi/10.1122/1.5048051 | |
dc.description.abstract | This work is focused on the characterization and magnetorheological (MR) study of MR fluids composed of iron particles and sepiolite fibers, used as a thickening agent. The work is aimed at (a) understanding the effect of the sepiolite addition on the MR response and (b) finding an appropriate formulation allowing a good sedimentation stability keeping a relatively low off-state viscosity and providing an enhanced MR effect. In the presence of an applied magnetic field, the composite MR fluid exhibits a yielding behavior with a progressive enhancement of the field-induced static yield stress with increasing volume fractions of both iron and sepiolite. Such an effect is attributed to a friction between gap-spanning aggregates composed of iron particles and sepiolite-oil viscoplastic matrix. The field-induced dynamic yield stress shows an initial increase with the sepiolite concentration (explained by a partial expulsion of the sepiolite fibers from the aggregates) followed by a decrease. The proposed mechanisms are supported by developed qualitative theoretical models, one of which is based on the homogenization approach of Château et al. [J. Rheol. 52, 489-506 (2008)]. From the practical point of view, the formulation containing 10 vol. % of iron and 4 vol. % of sepiolite seems to combine a perfect sedimentation stability with moderate values of the plastic viscosity and of the off-state static yield stress (only ∼5 Pa) and with a relatively important static and dynamic yield stress enhancement (30% and 60%, respectively). © 2018 The Society of Rheology. | en |
utb.faculty | University Institute | |
dc.identifier.uri | http://hdl.handle.net/10563/1008461 | |
utb.identifier.obdid | 43880400 | |
utb.identifier.scopus | 2-s2.0-85059505881 | |
utb.identifier.wok | 000455087200012 | |
utb.identifier.coden | JORHD | |
utb.source | j-scopus | |
dc.date.accessioned | 2019-07-08T11:59:48Z | |
dc.date.available | 2019-07-08T11:59:48Z | |
dc.description.sponsorship | French Government [ANR-15-IDEX-01]; Brazilian CNPq [203100/2014]; Czech Ministry of Education, Youth and Sports of the Czech Republic-Program NPU I [LO1504] | |
utb.ou | Centre of Polymer Systems | |
utb.contributor.internalauthor | Plachý, Tomáš | |
utb.fulltext.affiliation | Jessica A. Marins 1, Tomáš Plachý 1,2, Pavel Kuzhir 1* 1 University Côte d’Azur, CNRS UMR 7010 Institute of Physics of Nice, Parc Valrose 06108 Nice, France 2 Centre of Polymer Systems, Tomas Bata University in Zlin, trida Tomase Bati 5678, 760 01 Zlin, Czech Republic * Corresponding author: kuzhir@unice.fr | |
utb.fulltext.dates | - | |
utb.wos.affiliation | [Marins, Jessica A.; Plachy, Tomas; Kuzhir, Pavel] Univ Cote Azur, Inst Phys Nice, CNRS UMR 7010, Parc Valrose, F-06108 Nice, France; [Plachy, Tomas] Tomas Bata Univ Zlin, Ctr Polymer Syst, Trida Tomase Bati 5678, Zlin 76001, Czech Republic | |
utb.scopus.affiliation | CNRS UMR 7010, Institute of Physics of Nice, University Côte d'Azur, Parc Valrose, Nice, 06108, France; Centre of Polymer Systems, Tomas Bata University in Zlin, trida Tomase Bati 5678, Zlin, 760 01, Czech Republic | |
utb.fulltext.faculty | University Institute | |
utb.fulltext.ou | Centre of Polymer Systems |