作者：Yuhong Cui, Fei Wu, Jiqi Wang, Yabin Wang, Tariq Shah, Pei Liu, Qiuyu Zhang, Baoliang Zhang
关键字：Ti3C2Tx MXene, Carbon nanotubes, Porous microspheres, Microwave absorbing
论文来源：期刊
具体来源：Composites Part A
发表时间：2021年

In this paper, a simple ultrasonic spray technology is used to assemble one-dimensional (1D) carboxylated carbon nanotubes (C-CNTs) and two-dimensional (2D) Ti3C2Tx MXene nanosheets into three-dimensional (3D) porous MXene/C-CNTs microspheres (MCM). After vacuum carbonization, C-MCM with excellent microwave absorbing properties are obtained. It finds that the synergy of MXene and CNTs makes C-MCM have good impedance matching and microwave attenuation capabilities. Under the best mass ratio (MXene: CNTs = 3:1) and filler content (30%), the minimum reflection loss (RLmin) is -45 dB@10 GHz, and the corresponding matching thickness is 2.7 mm. When the thickness is 1.9 mm, the effective absorption bandwidth (EAB) reaches 4.9 GHz. By adjusting the thickness of the absorber, almost all electromagnetic waves in the C, X and Ku bands can be completely absorbed. Therefore, C-MCM provides a new way to manufacture electromagnetic wave absorbers with light weight, thin thickness, high efficiency and broadband.