Reactive fillers based on SWCNTs functionalized with matrix-based moieties for the production of epoxy composites with superior and tunable properties

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DOIResolve DOI: http://doi.org/10.1088/0957-4484/23/28/285702
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TypeArticle
Journal titleNanotechnology
ISSN0957-4484
Volume23
Issue28
Article number285702
SubjectChemical affinities; Covalent functionalizations; Degradation temperatures; Electrical conductivity; Epoxy composite; Epoxy matrices; Functionalizations; Functionalized; Grafted moieties; Interfacial bonding; Reactive fillers; Thermal Performance; Tunable properties; Electric conductivity; Loading; Physical properties; Single-walled carbon nanotubes (SWCN); Fillers
AbstractComposite materials based on epoxy matrix and single-walled carbon nanotubes (SWCNTs) are able to exhibit outstanding improvements in physical properties when using a tailored covalent functionalization with matrix-based moieties containing terminal amines or epoxide rings. The proper choice of grafted moiety and integration protocol makes it feasible to tune the composite physical properties. At 0.5wt% SWCNT loading, these composites exhibit up to 65% improvement in storage modulus, 91% improvement in tensile strength, and 65% improvement in toughness. A 15°C increase in the glass transition temperature relative to the parent matrix was also achieved. This suggests that a highly improved interfacial bonding between matrix and filler, coupled to improved dispersion, are achieved. The degradation temperatures show an upshift in the range of 4060°C, which indicates superior thermal performance. Electrical conductivity ranges from 10 13 to 10 3Scm 1, which also shows the possibility of tuning the insulating or conductive behaviour of the composites. The chemical affinity of the functionalization moieties with the matrix and the unchanged molecular structure at the SWCNT/matrix interface are responsible for such improvements.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Security and Disruptive Technologies
Peer reviewedYes
NPARC number21270271
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Record identifiere8f5e341-e7df-4eee-98c2-9635f8f5eca6
Record created2014-01-20
Record modified2016-05-09
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