Drywall Panel Coated with Biochar for Electromagnetic Shielding Applications

Biochar, a material derived from biomass with a high carbon content, is a sustainable, renewable, eco-friendly, and cost-effective option in many applications. Recently, biochar has been added to construction materials in order to increase their electromagnetic shielding properties. In this work, commercially produced biochar, thermally treated at 750 °C, is applied in multiple layers on drywall panels aiming to develop a building component with increased shielding effectiveness for the construction sector. The transmission properties of drywall panels with several biochar layers are measured in the frequency band 1-12 GHz.