Preparation of MXene/Fe3O4 NPs composite film with egg-box structure for high electromagnetic interference shielding and fire protection application

This paper prepared a new kind of MXene/Fe 3 O 4 nanoparticles composite film with egg-box structure and electromagnetic double conductance characteristic. Hollow microspheres were used as the porous structure template, Fe 3 O 4 nanoparticles were in-situ synthesized on the surface of maleic anhydride-styrene hollow microsphere, MXene sheet was encapsulated on the surface of maleic anhydride-styrene hollow microsphere@Fe 3 O 4 nanoparticles, after filtration and high-temperature annealing treatment, the egg-box structure MXene/Fe 3 O 4 nanoparticles composite film was obtained. Further, the element composition, crystal structure, thermal stability, electromagnetic interference shielding efficiency, and fire protection properties of MXene/Fe 3 O 4 nanoparticles composite film were tested. Test results demonstrated that this MXene/Fe 3 O 4 NPs composite film exhibited high thermal stability (＞700 ºC), high electromagnetic interference shielding efficiency (76.6 dB), and high fire protection properties (LOI=35.3 %), and it could be applied in information equipment packaging material field.