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dc.contributor.authorO'NEILL, ARLENEen
dc.contributor.authorCOLEMAN, JONATHANen
dc.contributor.authorKHAN, UMARen
dc.contributor.authorMAY, PETERen
dc.date.accessioned2013-08-07T09:01:06Z
dc.date.available2013-08-07T09:01:06Z
dc.date.issued2013en
dc.date.submitted2013en
dc.identifier.citationKhan, U., May, P., O'Neill, A., Bell, A.P., Boussac, E., Martin, A., Semple, J., Coleman, J.N., Polymer reinforcement using liquid-exfoliated boron nitride nanosheets, Nanoscale, 5, 2, 2013, 581-587en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/66859
dc.descriptionPUBLISHEDen
dc.description.abstractWe have exfoliated hexagonal boron nitride by ultrasonication in solutions of polyvinylalcohol in water. The resultant nanosheets are sterically stabilised by adsorbed polymer chains. Centrifugation-based size-selection was used to give dispersions of nanosheets with aspect ratio (length/thickness) of ~1400. Such dispersions can be used to produce polyvinylalcohol-BN composite films. Helium ion microscopy of fracture surfaces shows the nanosheets to be well dispersed and the composites to fail by pull-out. We find both modulus, Y, and strength, ?B, of these composites to increase linearly with volume fraction, Vf, up to Vf ~ 0.1 vol% BN before falling off. The rates of increase are extremely high; dY/dVf = 670 GPa and d?B/dVf = 47 GPa. The former value matches theory based on continuum mechanics while the latter value is consistent with remarkably high polymer-filler interfacial strength. However, because the mechanical properties increase over such a narrow volume fraction range, the maximum values of both modulus and strength are only ~40% higher than the pure polymer. This phenomenon has also been observed for graphene-filled composites and represents a serious hurdle to the production of high performance polymer-nanosheet composites.en
dc.description.sponsorshipThe authors would like to acknowledge Science Foundation Ireland, (grant number 07/IN.7/I1772), and ERC grant SEMAN- TICS for ? nancial support. We also acknowledge the CRANN Advanced Microscopy Lab (AML) for help with Helium ion microscopyen
dc.format.extent581-587en
dc.language.isoenen
dc.relation.ispartofseriesNanoscaleen
dc.relation.ispartofseries5en
dc.relation.ispartofseries2en
dc.rightsYen
dc.subjectgraphene-filled compositesen
dc.subject.lcshgraphene-filled compositesen
dc.titlePolymer reinforcement using liquid-exfoliated boron nitride nanosheetsen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/colemajen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/ukhanen
dc.identifier.rssinternalid84611en
dc.identifier.doihttp://dx.doi.org/10.1039/c2nr33049ken
dc.contributor.sponsorGrantNumber7/IN.7/I1772en
dc.subject.TCDThemeNanoscience & Materialsen


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