Dynamic and regional constructive electromagnetic protecting materials made by MWNT/Fe3O4/poly pyrrole doped vitrimers

Electromagnetic protection is always an important factor for electrical device. Therefore electromagnetic shielding materials (ESM) with good properties such and easy-processing is desirable. Vitrimer, a kind of material that equipped with advantages of both thermoplastics and thermosets, such as proof of acid and alkaline, mechanical stability, and easy processing was recently discovered. In our research, we use vitrimer as matrix, doped with MWNT/Fe3O4 composite, to form a new kind of ESM. MWNT/Fe3O4 was prepared by MWNT and Fe(acac)3. Outcome has shown that such ESM is stable at room temperature and suitably deformable at evaluated temperature, making it easy for constructing surface fitted ESM. Also, MWNT absorption of light focus enables its spatial and regional deformation. Fe(acac)3 prepared MWNT/Fe3O4 showed a significant improvement in microwave-range reflection loss. Lap-shear test provided almost an equal capacity of self-healing under external force and magnetic force. As a result, the ESM showed promising perspective on wilder usage of electromagnetic protection with greater properties.