Lightweight multifunctional electromagnetic shielding composites achieved by depositing Ag@MXene hybrid particles on wood-based aerogel

Abstract

As electronic devices become more integrated into daily life, concerns about electromagnetic radiation pollution become more severe, despite the increased portability they offer. Designing a lightweight and multifunctional material that is environmentally friendly, thermally conductive, and electromagnetically shielded is urgently needed. In this work, novel composites were fabricated by incorporating Ag@MXene hybrid particles into the wood-based aerogel. Compared with the aerogels containing only Ag nanoparticles (AgNPs) or MXene, the Ag@MXene/W aerogel exhibited more homogeneous dispersion of unfolded MXene nanosheets and more AgNPs but higher porosity (97.1 %) and smaller density (0.047 g cm−3). Consequently, the Ag@MXene/W aerogel exhibited high compressibility and low energy dissipation, remarkable strain sensitivity, impressive electrical conductivity (33.9 S m−1) and specific electromagnetic shielding efficiency (5765.96 dB cm2 g−1), and high thermal conductivity (0.81 W m−1 K−1). The excellent comprehensive performances ensure that the aerogel has wide applications in various fields, including electromagnetic pollution protection, strain detecting, and thermal management, etc.