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Title

Epoxy composites with covalently anchored amino-functionalized SWNTs: Towards the tailoring of physical properties through targeted functionalization

AuthorsGonzález Domínguez, José Miguel; Díez Pascual, Ana María; Ansón Casaos, Alejandro ; Gómez Fatou, Marian A.; Martínez Fernández de Landa, María Teresa
KeywordsEpoxy composites
Functionalized SWNYs
Issue Date2011
PublisherRoyal Society of Chemistry (UK)
CitationJournal of Materials Chemistry 21: 14948- 14958 (2011)
AbstractFunctionalization of single-walled carbon nanotubes (SWNTs) with covalently grafted amine moieties provides reactive fillers with potential for covalent anchoring to an epoxy matrix. Manufacturing and characterization of a high performance epoxy system reinforced with as-grown and aminated SWNTs are presented through four different approaches. Epoxy composite materials incorporating SWNTs aminated through sidewall addition reactions present enhanced mechanical, thermal and electrical properties, beyond the effect of unfunctionalized SWNTs. The functionalization pathways studied here lead to a composite with specific improvements in some of the physical properties of the epoxy matrix, which enables the tailored design of the composite's properties through functionalization. The amination via diazonium reaction with 4-aminobenzylamine is especially effective in enhancing the tensile and impact properties of the epoxy composites (44% improvement in impact strength at 0.1 wt% loading) and leads to the highest increase in elastic modulus reported so far for the integration of aminated nanotubes into epoxy resin. Composites incorporating aminated SWNTs throughout the 1,3-dipolar cycloaddition reaction stand out for their thermo-oxidative stability and thermomechanical properties. The incorporation of as-produced arc-discharge SWNTs into the TGAP/DDS epoxy matrix leads to composite materials with the highest electrical conductivity among all the studied samples. This journal is © The Royal Society of Chemistry.
DescriptionFirst published on the web August 24th, 2011
Publisher version (URL)http://dx.doi.org/10.1039/C1JM12251G
URIhttp://hdl.handle.net/10261/76879
DOI10.1039/C1JM12251G
Identifiersdoi: 10.1039/C1JM12251G
issn: 0959-9428
e-issn: 1364-5501
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