dc.contributor.author | O'NEILL, ARLENE | en |
dc.contributor.author | COLEMAN, JONATHAN | en |
dc.contributor.author | KHAN, UMAR | en |
dc.contributor.author | MAY, PETER | en |
dc.date.accessioned | 2013-08-07T09:01:06Z | |
dc.date.available | 2013-08-07T09:01:06Z | |
dc.date.issued | 2013 | en |
dc.date.submitted | 2013 | en |
dc.identifier.citation | Khan, 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, 581-587 | en |
dc.identifier.other | Y | en |
dc.identifier.uri | http://hdl.handle.net/2262/66859 | |
dc.description | PUBLISHED | en |
dc.description.abstract | We 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.sponsorship | The 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
microscopy | en |
dc.format.extent | 581-587 | en |
dc.language.iso | en | en |
dc.relation.ispartofseries | Nanoscale | en |
dc.relation.ispartofseries | 5 | en |
dc.relation.ispartofseries | 2 | en |
dc.rights | Y | en |
dc.subject | graphene-filled composites | en |
dc.subject.lcsh | graphene-filled composites | en |
dc.title | Polymer reinforcement using liquid-exfoliated boron nitride nanosheets | en |
dc.type | Journal Article | en |
dc.type.supercollection | scholarly_publications | en |
dc.type.supercollection | refereed_publications | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/colemaj | en |
dc.identifier.peoplefinderurl | http://people.tcd.ie/ukhan | en |
dc.identifier.rssinternalid | 84611 | en |
dc.identifier.doi | http://dx.doi.org/10.1039/c2nr33049k | en |
dc.subject.TCDTheme | Nanoscience & Materials | en |
dc.contributor.sponsor | Science Foundation Ireland (SFI) | en |
dc.contributor.sponsorGrantNumber | 7/IN.7/I1772 | en |