A broadband and strong microwave absorption of Ti3C2Tx MXene/PPy composites with a core-shell structure

作者：Lei, Yanhua; Ding, Mengchao; Wu, Haikun; Yin, Di; Li, Yang; Jiang, Bochen; Sun, Kai^*; Zhang, Yuliang; Du, Hailiang

来源：Synthetic Metals, 2023, 293: 117254.

DOI：10.1016/j.synthmet.2022.117254

• MXene
• Core-shell structure
• Electromagnetic wave absorption
• K u band

In this work, the layered Ti3C2Tx MXene were coated with polypyrrole particles by an in-situ polymerization method, and their electromagnetic wave absorption performance were systematically studied. The MXene/PPy composites presented an excellent electromagnetic wave absorption performance, the strongest reflection loss can reach - 68 dB at 2.68 mm. Meanwhile, when the thickness is 2.26 mm, the effective absorption bandwidth can reach 6.56 GHz (from 11.44 to 18 GHz), covering the entire Ku band (12-18 GHz). The multiple reflections at the heterogeneous interface, and the synergistic effect between the layered MXene and the conductive polypyrrole network made a combined effect on the optimized absorption. The MXene/PPy composites with a strong electromagnetic wave absorption, wide effective absorption bandwidth and corrosion resistance have a great value in aircraft and vessel fields.