Exploring the microwave absorption properties of Morchella Esculenta: A sustainable biomaterial for electromagnetic interference shielding

The pursuit of sustainable and efficient materials for microwave absorption has gained significant momentum in recent years. This research article investigates the microwave absorption properties of the Himalayan mushroom Morchella Esculenta as a sustainable biomass material for electromagnetic interference (EMI) shielding applications. The study encompasses morphological, optical, and dielectric characterizations of Morchella Esculenta powder in the frequency range of 2–18 GHz. Morphological analysis reveals the presence of plate-like and wire-like structures along with voids, which contribute to polarization and conductive losses, enhancing microwave absorption. Dielectric measurements indicate significant polarization effects and conductive losses, with a maximum reflection loss of − 27.37 dB at 13.78 GHz for a 7 mm thick sample and an effective absorption bandwidth of 8.15 GHz. The material’s amorphous nature, functional groups, and a low optical band gap of 2 eV further support its microwave absorption capabilities. Simulation studies using CST Microwave Studio confirm near-perfect electromagnetic wave absorption at optimal thickness. The findings demonstrate that Morchella Esculenta, without any chemical or physical treatment, exhibits promising microwave absorption performance, highlighting its potential as an eco-friendly and efficient material for EMI shielding and related technological applications. • Investigated Morchella Esculenta (Mushroom) for microwave absorption properties. • Significant dielectric loss observed between 10 and 14.5 GHz frequencies. • Strong resonance peak at 13.78 GHz with − 27.37 dB reflection loss. • Eco-friendly Himalayan biomass shows promise for stealth technology applications. • Morphological features enhance polarization and conductive losses.