Building Ti3C2Tx/Polypyrrole@PMA/Ni multi-component nanocomposites for achieving excellent electromagnetic wave absorption

MXene is a new kind of two-dimensional material with high electrical conductivity, high specific surface area and abundant polar functional groups, and these properties give MXene and its composites significant advantages in designing efficient wave-absorbing materials. In this work, a typical etching method is used to obtain the MXene layered structure, and the conductivity and impedance matching are improved by introducing conductive polymers and magnetic particles to finally produce Ti₃C₂T_x/Polypyrrole@PMA/Ni composite wave-absorbing materials. Two samples, S1 and S2, are fabricated by varying the ratio of Polypyrrole@PMA in the product. The minimum reflection loss of -45.76 dB and a bandwidth of 3.68 GHz are attainmented when the thickness of the S1 sample is 2 mm. While the sample of S2 has an overall effective absorption bandwidth below -10 dB of 15.2 GHz with thicknesses ranging from 1.5 mm to 5 mm. The reflection losses are basically below -20 dB, and -45.8 dB and -39.99 dB at 11.28 GHz and 4.24 GHz are realised at the 2.15 mm and 5 mm thicknesses, respectively. It is therefore reasonable to believe that this structural design provides a new direction for the subsequent research on multicomponent MXene-based nanocomposites with excellent wave-absorbing properties.