1. Carbon nanotube composites for broadband microwave absorbing materials
- Author
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UCL - FSA/ELEC - Département d'électricité, UCL - FSA/MAPR - Département des sciences des matériaux et des procédés, UCL - FSA/RFSA - Rattachement FSA, Saib, Aimad, Bednarz, Lukasz, Daussin, Raphaël, Bailly, Christian, Lou, Xudong, Thomassin, J.-M., Pagnoulle, Christophe, Detrembleur, Christophe, Jérôme, R., Huynen, Isabelle, UCL - FSA/ELEC - Département d'électricité, UCL - FSA/MAPR - Département des sciences des matériaux et des procédés, UCL - FSA/RFSA - Rattachement FSA, Saib, Aimad, Bednarz, Lukasz, Daussin, Raphaël, Bailly, Christian, Lou, Xudong, Thomassin, J.-M., Pagnoulle, Christophe, Detrembleur, Christophe, Jérôme, R., and Huynen, Isabelle
- Abstract
In this paper, we present a new shielding and absorbing composite based on carbon nanotubes (CNTs) dispersed inside a polymer dielectric material. The extremely high aspect ratio of CNTs and their remarkable conductive properties lead to good absorbing properties with very low concentrations. A broadband characterization technique is used to measure the microwave electrical properties of CNT composites. It is shown that a conduction level of 1 S/m is reached for only 0.35 weight % of a CNT, while, for a classical absorbing composite based on carbon black, 20% concentration is mandatory. The conductive properties are explained by a phenomenological electrical model and successfully correlated with rheological data aiming at monitoring the dispersion of conductive inclusions in polymer matrices.
- Published
- 2006