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Article: Electrical and rheological percolation of polymer nanocomposites prepared with functionalized copper nanowires

TitleElectrical and rheological percolation of polymer nanocomposites prepared with functionalized copper nanowires
Authors
KeywordsArticle
Electric Conductivity
Electricity
Flow Kinetics
Priority Journal
Scanning Electron Microscopy
Transmission Electron Microscopy
Issue Date2008
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nano
Citation
Nanotechnology, 2008, v. 19 n. 21 How to Cite?
AbstractThe morphological, electrical and rheological characterization of polystyrene nanocomposites containing copper nanowires (CuNWs) functionalized with 1-octanethiol is presented. Characterization by SEM and TEM shows that surface functionalization of the nanowires resulted in significant dispersion of CuNWs in the PS matrix. The electrical characterization of the nanocomposites indicates that functionalized CuNWs start to form electrically conductive networks at lower concentrations (0.25 vol% Cu) than using unfunctionalized CuNWs (0.5 vol% Cu). The organic coating on the nanowires prevents significant changes in the electrical resistivity in the vicinity of the percolation threshold. Percolated nanocomposites showed electrical resistivity in the range of 106-107 Ω cm. The transition from liquid-like to solid-like behavior (rheological percolation) of the nanocomposites was studied using dynamic rheology at 200°C. Unfunctionalized CuNWs result in electrical and rheological percolation at similar concentrations. Functionalized CuNWs show rheological percolation at higher concentration (1.0-2.0 vol%) than that required for electrical percolation. This is attributed to the decrease in the interfacial tension between nanowires and polymer chains and its effect on the viscoelastic behavior of the combined polymer-nanowire networks. © IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/90872
ISSN
2015 Impact Factor: 3.573
2015 SCImago Journal Rankings: 1.196
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorGelves, GAen_HK
dc.contributor.authorLin, Ben_HK
dc.contributor.authorSundararaj, Uen_HK
dc.contributor.authorHaber, JAen_HK
dc.date.accessioned2010-09-17T10:09:39Z-
dc.date.available2010-09-17T10:09:39Z-
dc.date.issued2008en_HK
dc.identifier.citationNanotechnology, 2008, v. 19 n. 21en_HK
dc.identifier.issn0957-4484en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90872-
dc.description.abstractThe morphological, electrical and rheological characterization of polystyrene nanocomposites containing copper nanowires (CuNWs) functionalized with 1-octanethiol is presented. Characterization by SEM and TEM shows that surface functionalization of the nanowires resulted in significant dispersion of CuNWs in the PS matrix. The electrical characterization of the nanocomposites indicates that functionalized CuNWs start to form electrically conductive networks at lower concentrations (0.25 vol% Cu) than using unfunctionalized CuNWs (0.5 vol% Cu). The organic coating on the nanowires prevents significant changes in the electrical resistivity in the vicinity of the percolation threshold. Percolated nanocomposites showed electrical resistivity in the range of 106-107 Ω cm. The transition from liquid-like to solid-like behavior (rheological percolation) of the nanocomposites was studied using dynamic rheology at 200°C. Unfunctionalized CuNWs result in electrical and rheological percolation at similar concentrations. Functionalized CuNWs show rheological percolation at higher concentration (1.0-2.0 vol%) than that required for electrical percolation. This is attributed to the decrease in the interfacial tension between nanowires and polymer chains and its effect on the viscoelastic behavior of the combined polymer-nanowire networks. © IOP Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/nanoen_HK
dc.relation.ispartofNanotechnologyen_HK
dc.subjectArticleen_HK
dc.subjectElectric Conductivityen_HK
dc.subjectElectricityen_HK
dc.subjectFlow Kineticsen_HK
dc.subjectPriority Journalen_HK
dc.subjectScanning Electron Microscopyen_HK
dc.subjectTransmission Electron Microscopyen_HK
dc.titleElectrical and rheological percolation of polymer nanocomposites prepared with functionalized copper nanowiresen_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0957-4484/19/21/215712en_HK
dc.identifier.scopuseid_2-s2.0-43249096725en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-43249096725&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume19en_HK
dc.identifier.issue21en_HK
dc.identifier.eissn1361-6528-
dc.identifier.isiWOS:000255662400024-

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