Design of ANF/MXene/SSG Sandwich Structure With Electromagnetic Shielding Performance and Impact Resistance

Following the emergence of the information age, electronic devices have assumed a pivotal role in both individual and societal frameworks. Nevertheless, the deployment of electronic equipment exacerbates electromagnetic (EM) contamination, while environmental complexities amplify the risk of damage in electronic devices. In this work, aramid nanofibers (ANF), MXene, and shear stiffening gel (SSG) were combined into a flexible sandwich structure using vacuum filtration, directional freeze-casting solidification, and polyurethane encapsulation. The primary EM wave attenuation mechanisms of the ANF/MXene/SSG/MXene/ANF (A/M/S/M/A) structure are microscopic multireflection and ohmic loss absorption, demonstrating an EMI SE of 64.85 dB in the X-band. Simultaneously, this A/M/S/M/A structure can attenuate up to 50% of the impact force, which has good buffering capacity. The Polydimethylsiloxane (PDMS)/MXene-GO-NiNCs (MGN) triboelectric nanogenerator (TENG) fabricated from the A/M/S/M/A structure in this work can generate voltage under external stimuli, thereby enabling the recycling of mechanical energy. This flexible functional composite demonstrates significant potential for applications in wearable technology, electronics, and EMI shielding.