Flexible and ultra-thin graphene@MXene@Fe3O4 composites with excellent microwave absorption performance

Fabric-based microwave absorbing materials are favored due to their excellent flexibility and lightweight. However, the complex preparation method and unsatisfactory absorbing properties limit its mass production and practical application. Herein, a graphene@MXene@Fe 3 O 4 wave-absorbing slurry was prepared and coated on pre-treated aramid non-woven fabric by screen printing, to obtain flexible and efficient wave-absorbing modified fabric. Based on the high dielectric loss capacity of graphene and MXene, the magnetic loss can be successfully managed by modifying the Fe 3 O 4 content of the slurry to modulate the impedance matching, reflection loss (RL), and effective absorption bandwidth (EAB). The graphene@MXene@Fe 3 O 4 modified fabric demonstrated impressive microwave absorbing properties after multi-component integration and interface optimization. Notably, under an ultra-thin thickness of 1.5 mm, the reflection loss (RL min ) value of the modified fabric reaches −47.6 dB under the X band. This work also establishes the way for the development of flexible and ultra-thin microwave absorbers utilizing a straightforward approach, which has a wide range of applications in the field of flexible absorbing materials.