Résumé
We have previously shown a method to functionalize carbon nanotubes (CNTs) surface to create a covalent link with polymer matrix. In particular evidences for chemical functionalization have been demonstrated using characterization techniques such as XRD, FT Raman, TEM, XPS and NEXAFS. Two kind of polymers have been used - thermoset (epoxy) and thermoplastic (PEEK). While several attempts have been done in order to obtain a satisfying shaping method for PEEK-based composite material, mechanical and electrical tests have been performed on epoxy-based composite material, with different carbon nanotube weight fraction, and using functionalized and non-functionalized CNTs. In particular conductivity measurements have been done showing a spectacular increase in the case of composite made with 0.50 % in weight of functionalized nanotubes in epoxy.