Carbon fiber reinforced composites (CFRCs) panels were manufactured with a Resin Film Infusion (RFI) approach by mixing a tetrafunctional epoxy precursor with a reactive diluent which allows to reduce the viscosity of the matrix and facilitate the dispersion in it of 0.5 wt.% multiwall carbon nanotubes (MWCNTs). The proper choice of the viscosity value and the infusion technique allows to obtain high electrical conductivity of panels composed by 7 plies of carbon fiber (crossing at 90°) cloths. The anisotropic electrical behavior is characterized by two in-plane electrical conductivities of 11.34 kS/m (in the direction parallel to the fibers) and 9.57 kS/m (at 45° with respect to the fibers), whereas a value of 1.75 S/m was achieved for the out of plane (through the thickness) value. The DC measurements confirm that the fibers govern the conduction mechanisms in the in-plane direction, whereas the percolating path created by the effective distribution of MWCNTs, favoured by resin formulation and adopted processing approach, leads to a significant enhancement of the overall electrical performance of the CFRCs.

Enhanced electrical properties of carbon fiber reinforced composites obtained by an effective infusion process

BARRA, GIUSEPPINA;DE VIVO, BIAGIO;EGIZIANO, Luigi;GUADAGNO, Liberata;LAMBERTI, PATRIZIA;RAIMONDO, MARIALUIGIA;SPINELLI, GIOVANNI;TUCCI, Vincenzo;VERTUCCIO, LUIGI;VIETRI, UMBERTO;
2014

Abstract

Carbon fiber reinforced composites (CFRCs) panels were manufactured with a Resin Film Infusion (RFI) approach by mixing a tetrafunctional epoxy precursor with a reactive diluent which allows to reduce the viscosity of the matrix and facilitate the dispersion in it of 0.5 wt.% multiwall carbon nanotubes (MWCNTs). The proper choice of the viscosity value and the infusion technique allows to obtain high electrical conductivity of panels composed by 7 plies of carbon fiber (crossing at 90°) cloths. The anisotropic electrical behavior is characterized by two in-plane electrical conductivities of 11.34 kS/m (in the direction parallel to the fibers) and 9.57 kS/m (at 45° with respect to the fibers), whereas a value of 1.75 S/m was achieved for the out of plane (through the thickness) value. The DC measurements confirm that the fibers govern the conduction mechanisms in the in-plane direction, whereas the percolating path created by the effective distribution of MWCNTs, favoured by resin formulation and adopted processing approach, leads to a significant enhancement of the overall electrical performance of the CFRCs.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11386/4545857
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? ND
social impact