Core/shell-structured, covalently bonded TiO2/poly(3,4-ethylenedioxythiophene) dispersions and their electrorheological response: The effect of anisotropy

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dc.citation.epage103171en_US
dc.citation.issueNumber125en_US
dc.citation.spage103159en_US
dc.citation.volumeNumber5en_US
dc.contributor.authorErol, O.en_US
dc.contributor.authorUnal, H. I.en_US
dc.date.accessioned2016-02-08T11:00:02Z
dc.date.available2016-02-08T11:00:02Z
dc.date.issued2015en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractAs a new electrorheological (ER) material, core/shell nanorods composed of a titania core and conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) shell were prepared via covalent bonding to achieve a thin polymer shell and make the interfacial interactions between the two components more impressive. The successful coating of PEDOT on the nanorod-TiO2 particles was confirmed by TEM analysis. The antisedimentation stability of the core/shell nanorod-TiO2/PEDOT particles was determined to be 100%. The ER properties of the materials were studied under controlled shear, oscillatory shear and creep tests. The dielectric spectra of the dispersions were obtained to further understand their ER responses and fitted with the Cole-Cole equation. The ER behavior of the dispersions was also observed using an optical microscope. The flow curves of these ER fluids were determined under various electric field strengths and their flow characteristics examined via a rheological equation using the Cho-Choi-Jhon (CCJ) model. In addition, the results were also compared with nanoparticle-TiO2/PEDOT. It was concluded that the conducting thin polymer shell and elongated structure of the hybrid material introduced a synergistic effect on the electric field induced polarizability and colloidal stability against sedimentation, which resulted in stronger ER activity, storage modulus and higher recovery after stress loadings when compared to nanoparticle-TiO2/PEDOT. © The Royal Society of Chemistry.en_US
dc.identifier.doi10.1039/c5ra20284aen_US
dc.identifier.issn2046-2069
dc.identifier.urihttp://hdl.handle.net/11693/26452
dc.language.isoEnglishen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.isversionofhttps://doi.org/10.1039/c5ra20284aen_US
dc.source.titleRSC Advancesen_US
dc.subjectConducting polymersen_US
dc.subjectElectric fieldsen_US
dc.subjectElectrorheological fluidsen_US
dc.subjectHybrid materialsen_US
dc.subjectNanofluidicsen_US
dc.subjectNanoparticlesen_US
dc.subjectNanorodsen_US
dc.subjectRheologyen_US
dc.subjectTitanium dioxideen_US
dc.subject3 ,4-ethylenedioxythiopheneen_US
dc.subjectElectric field induceden_US
dc.subjectElectric field strengthen_US
dc.subjectElectrorheological responseen_US
dc.subjectFlow charac-teristicsen_US
dc.subjectInterfacial interactionen_US
dc.subjectPoly(3 ,4 ethylenedioxythiophene) (PEDOT)en_US
dc.subjectRheological equationsen_US
dc.subjectDispersionsen_US
dc.titleCore/shell-structured, covalently bonded TiO2/poly(3,4-ethylenedioxythiophene) dispersions and their electrorheological response: The effect of anisotropyen_US
dc.typeArticleen_US

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