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dc.title | A tensiometric study of magnetorheological suspensions' stability | en |
dc.contributor.author | Sedlačík, Michal | |
dc.contributor.author | Pavlínek, Vladimír | |
dc.relation.ispartof | RSC Advances | |
dc.identifier.issn | 2046-2069 Scopus Sources, Sherpa/RoMEO, JCR | |
dc.date.issued | 2014 | |
utb.relation.volume | 4 | |
utb.relation.issue | 102 | |
dc.citation.spage | 58377 | |
dc.citation.epage | 58385 | |
dc.type | article | |
dc.language.iso | en | |
dc.publisher | Royal Society of Chemistry (RSC) | |
dc.identifier.doi | 10.1039/c4ra11842a | |
dc.relation.uri | http://pubs.rsc.org/en/Content/ArticleLanding/2014/RA/C4RA11842A#!divAbstract | |
dc.description.abstract | A thin (3-aminopropyl)triethoxysilane (3APTS) layer with a grafting density around 50 groups per nm2 was coated onto soft magnetic carbonyl iron (CI) particles. Their physical characteristics were examined using various methods, and the results revealed that the coating layer did not affect the particles' morphology and magnetic properties while their resistance against thermal oxidation and chemical degradation was considerably improved. This study further evaluates the surface free energy of the particles under investigation using tensiometry, namely capillary rise experimental methods based on the Washburn theory. The dispersive and polar components of surface free energy were subsequently computed through the application of the Owens-Wendt-Rabel-Kaeble theory. It was observed that the coating of CI particles with 3APTS increased the dispersive component of surface free energy, resulting in the improved compatibility of such particles with non-polar silicone oil which is used as a carrier liquid for magnetorheological (MR) suspensions. Furthermore, the 3APTS coating has a negligible influence on MR properties in comparison with an uncoated CI particle-based MR suspension, as was proved by steady shear and small-strain oscillatory shear tests under various external magnetic fields. The improved compatibility of 3APTS-coated CI particles with silicone oil was reflected in the better sedimentation stability of the MR suspension, observed via tensiometry for the first time for MR suspensions, in comparison with the uncoated CI particle-based suspension. This journal is | en |
utb.faculty | University Institute | |
dc.identifier.uri | http://hdl.handle.net/10563/1003930 | |
utb.identifier.obdid | 43872181 | |
utb.identifier.scopus | 2-s2.0-84911913694 | |
utb.identifier.wok | 000345460800037 | |
utb.identifier.coden | RSCAC | |
utb.source | j-scopus | |
dc.date.accessioned | 2015-01-13T09:25:44Z | |
dc.date.available | 2015-01-13T09:25:44Z | |
dc.description.sponsorship | Grant Agency of the Czech Republic [14-32114P]; Operational Program Research and Development for Innovations; European Regional Development Fund (ERDF); national budget of the Czech Republic, within the framework of the project Centre of Polymer Systems [CZ.1.05/2.1.00/03.0111] | |
utb.ou | Centre of Polymer Systems | |
utb.contributor.internalauthor | Sedlačík, Michal | |
utb.contributor.internalauthor | Pavlínek, Vladimír | |
utb.fulltext.affiliation | M. Sedlacik* and V. Pavlinek Centre of Polymer Systems, University Institute, Tomas Bata University in Zlin, Nad Ovcirnou 3685, 760 01, Zlin, Czech Republic. E-mail: msedlacik@ft.utb.cz; Fax: +420 57 603 1444; Tel: +420 57 603 8027 | |
utb.fulltext.dates | Received 6th October 2014 Accepted 30th October 2014 | |
utb.fulltext.sponsorship | The author M. S. would like to thank the Grant Agency of the Czech Republic (14-32114P) for financial support. This article was written with support of the Operational Program Research and Development for Innovations co-funded by the European Regional Development Fund (ERDF) and the national budget of the Czech Republic, within the framework of the project Centre of Polymer Systems (reg. number: CZ.1.05/2.1.00/03.0111). | |
utb.fulltext.projects | GACR 14-32114P | |
utb.fulltext.projects | CZ.1.05/2.1.00/03.0111 | |
utb.fulltext.faculty | University Institute | |
utb.fulltext.faculty | University Institute | |
utb.fulltext.ou | Centre of Polymer Systems | |
utb.fulltext.ou | Centre of Polymer Systems |