Electrical conductive double-walled carbon nanotubes � Silica glass nanocomposites prepared by the sol�gel process and spark plasma sintering

Mônica Jung de Andrade (1) , Alicia Weibel (1) , Christophe Laurent (1) , Siegmar Roth , Carlos Pérez Bergmann , Claude Estournès (1) , Alain Peigney (1)

1 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

The electrical conductivity of suspensions in liquid of several kinds of carbon nanotubes (CNTs) is measured. Raw and soft-functionalized double-walled carbon nanotubes (DWCNTs) appear to be the most promising for achieving a low electrical percolation threshold. A 0.35 vol.% DWCNTs�SiO2 nanocomposite is prepared by the sol�gel process and densified by spark plasma sintering. The obtained material presents a fairly good dispersion of DWCNTs and its electrical conductivity (104 S cm1) is six orders of magnitude higher than that previously reported for 1 vol.% multi-walled CNTs�SiO2.

Mots clés: Carbon nanotubes; Nanocomposites; Silica; Spark plasma sintering; Electrical conductivity

Domaines: Matériaux

Mônica Jung de Andrade, Alicia Weibel, Christophe Laurent, Siegmar Roth, Carlos Pérez Bergmann, et al.. Electrical conductive double-walled carbon nanotubes � Silica glass nanocomposites prepared by the sol�gel process and spark plasma sintering. Scripta Materialia, 2009, 61 (10), pp.988-991. ⟨10.1016/j.scriptamat.2009.08.015⟩. ⟨hal-03565088⟩