Fabrication and Characterization of Eco-Friendly Non-Isocyanate Polyurethane Nanocomposites for Electromagnetic Shielding by Absorption

Khamis, Ahmad;Urbanczyk Laetitia;Detrembleur Christophe;Huynen, Isabelle
(2025) 2025 European Microwave Conference, September 2025. — Location: Utrecht, The Netherlands (23.September.2025)

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This study presents a novel approach to use nonisocyanate polyurethanes (NIPU) as a host matrix for carbon nanotubes (CNT) to fabricate CNT-NIPU nanocomposites forelectromagnetic shielding applications. The NIPU was formed using trimethylolpropane tricarbonate (TMPTC) and m-xylylenediamine (XDA. Different compositions (0.1% and 0.2%) of CNT were incorporated into the NIPU matrix. The CNT-NIPU nanocomposites were successfully prepared by mixing and curing and then characterized using a vector network analyzer (VNA) at room temperature. The nanocomposites' reflection coefficient (R) and shielding effectiveness (SE) against electromagnetic interferences (EMI) were measured in the 26.5 – 40 GHz frequency range. It was found that a 0.2% CNT sample had an SE of 20 dB/cm and a maximum absorption of 90 %. Increasing the CNT content from 0.1% to 0.2% significantly enhanced the SE and absorption.
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Khamis, A., Urbanczyk Laetitia, Detrembleur Christophe, & Huynen, I. (2025). Fabrication and Characterization of Eco-Friendly Non-Isocyanate Polyurethane Nanocomposites for Electromagnetic Shielding by Absorption. Proceedings of the 2025 European Microwave Conference, pp. 482-485. https://hdl.handle.net/2078.5/256641