Modifications of MWNTs surface and microtextureInfluence on MWNTs-based composites properties

摘要

Multiwalled carbon nanotubes are synthesized by catalytic decomposition of acetylene on a CoxMg(1-x)O solidsolution at 600°C. Tensile tests are performed on composites made with an epoxy resin loaded with 3 or 6 wt%MWNTs. Stress/strain curves show that filling epoxy resin with annealed MWNTs increases by 60% the elasticmodulus of the composites. Functionalization of the MWNTs surface by chemical treatment allows a betterdispersion of the nanotubes in epoxy. We obtain an increase of the interfacial bonding via an enhancement of theMWNTs wetting, leading to more brittle composites. We show that increasing the load transfer between epoxy andnanotubes has no effect on the composites modulus.