Multifunctional sandwich structure for electromagnetic absorption and mechanical performances

Bollen, Pierre;Quiévy, Nicolas;Bailly, Christian;Huynen, Isabelle;Pardoen, Thomas
(2014) 16th European Conference on Composite Materials — Location: Seville, Spain (22.June.2014)

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Abstract
A sandwich panel based on a multiscale architectured material is developed for structural and EM absorption performances. At the nanoscale level, carbon nanotubes are dispersed in a polymer to obtain a conductive material. This composite is then foamed into a micro porous solid to improve EM absorption and to decrease the density. The foam is inserted in a millimeter scale hexagonal metallic honeycomb lattice. The combination of the metallic honeycomb and the polymeric foam provides high bending, impact and crushing performances and a moderate thermal conductivity. This hybrid is used as core for sandwich panels, produced by the addition of two EM transparent face-sheets made of glass fiber reinforced polymers. EM absorption around 90% is achieved in the 10-40 GHz frequency band with a 8.8 mm thick sandwich panel.
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Bollen, P., Quiévy, N., Bailly, C., Huynen, I., & Pardoen, T. (2014). Multifunctional sandwich structure for electromagnetic absorption and mechanical performances. Proceedings of the 16th European Conference on Composite Materials. Published. 16th European Conference on Composite Materials, Seville, Spain. https://hdl.handle.net/2078.5/230652