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Materials Research

Print version ISSN 1516-1439


MIRANDA, André Navarro de; PARDINI, Luiz Claudio; SANTOS, Carlos Alberto Moreira dos  and  VIEIRA, Ricardo. Evaluation of carbon fiber composites modified by in situ incorporation of carbon nanofibers. Mat. Res. [online]. 2011, vol.14, n.4, pp.560-563.  Epub Nov 08, 2011. ISSN 1516-1439.

Nano-carbon materials, such as carbon nanotubes and carbon nanofibers, are being thought to be used as multifunctional reinforcement in composites. The growing of carbon nanofiber at the carbon fiber/epoxy interface results in composites having better electrical properties than conventional carbon fiber/epoxy composites. In this work, carbon nanofibers were grown in situ over the surface of a carbon fiber fabric by chemical vapor deposition. Specimens of carbon fiber/nanofiber/epoxy (CF/CNF/epoxy) composites were molded and electrical conductivity was measured. Also, the CF/CNF/epoxy composites were tested under flexure and interlaminar shear. The results showed an overall reduction in mechanical properties as a function of added nanofiber, although electrical conductivity increased up to 74% with the addition of nanofibers. Thus CF/CNF/epoxy composites can be used as electrical dissipation discharge materials.

Keywords : carbon nanofibers; epoxy composites; electrical conductivity.

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