Mechanical and electrical properties of polymer-derived Si-C-N ceramics reinforced by octadecylamine - modified single-wall carbon nanotubes

D. Shopova-Gospodinova (1) , Z. Burghard (1) , T. Dufaux (2) , M. Burghard (2) , J. Bill (1)

1 Universität Stuttgart
2 Max-Planck-Institut für Festkörperforschung

Polymer-derived Si-C-N ceramics reinforced by homogeneously distributed octadecylamine-functionalized single-walled carbon nanotubes (SWCNTs) were synthesized using a casting process, successive pressureless cross-linking and thermolysis. We find that the incorporation of even small amounts of modified SWCNTs leads to a remarkable improvement of mechanical and electrical transport properties of our composites. In particular, we find two-fold enhancement of fracture toughness. The Youngs modulus and the hardness show increase by ∼ 30 and 15%, respectively. Furthermore, the electrical conductivity was found to increase more than five orders of magnitude even for a tube content of 0.5 wt%.

Mots clés: A. carbon nanotubes; A. polymer-matrix composites; B. mechanical properties; B. electrical properties

Domaines: Matériaux

D. Shopova-Gospodinova, Z. Burghard, T. Dufaux, M. Burghard, J. Bill. Mechanical and electrical properties of polymer-derived Si-C-N ceramics reinforced by octadecylamine - modified single-wall carbon nanotubes. Composites Science and Technology, 2011, 71 (6), pp.931. ⟨10.1016/j.compscitech.2011.02.013⟩. ⟨hal-00736299⟩