Constructing Ti3C2Tx-MXene based gradient woodpile structure by DIW 3D printing for efficient microwave absorption

As a novel 2D material, Ti3C2Tx-MXene has attracted many researchers’ attention in the field of microwave absorption (MA). However, the MA effect of common Ti3C2Tx-MXene is not prominent and often requires complex processes or combinations of other materials to achieve better performance. In this context, a kind of gradient woodpile structures using common Ti3C2Tx-MXene as MA material were designed and manufactured through direct ink writing (DIW) 3D printing. The minimum reflection loss (RLmin) of the Ti3C2Tx-MXene based gradient woodpile structures with a thickness less than 3mm can reach -70dB, which is significantly improved compared with the full-filled structure. In addition, the effective absorption bandwidth (EAB) achieves 7.73 GHz. This work demonstrates that the common Ti3C2Tx-MXene Material can successfully achieve excellent MA performance and tunable frequency band through macroscopic structural design and DIW 3D printing, without the need for complex material hybridization and modification. It has broad application prospects in reducing electromagnetic wave radiation and interference.