Carbon cloth based flexible electromagnetic wave absorbing materials loaded with Co3O4 array and tunable electromagnetic wave absorption performance

Konghu Tian; Yanan Huang; Jing Wang; Chao Zhang; Ruiwen Shu; Zhihong Chen; Xiaowei Liu; Yufei Li; Lixin Xu

doi:10.1016/j.jcis.2023.06.131

Carbon cloth based flexible electromagnetic wave absorbing materials loaded with Co₃O₄ array and tunable electromagnetic wave absorption performance

J Colloid Interface Sci. 2023 Nov:649:675-684. doi: 10.1016/j.jcis.2023.06.131. Epub 2023 Jun 20.

Authors

Konghu Tian¹, Yanan Huang², Jing Wang³, Chao Zhang⁴, Ruiwen Shu⁵, Zhihong Chen², Xiaowei Liu², Yufei Li⁶, Lixin Xu⁶

Affiliations

¹ Analysis and Test Center, Anhui University of Science and Technology, Huainan 232001, China; School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China. Electronic address: tkhsuper@163.com.
² School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
³ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; Pinghu Institute of Advanced Materials, Zhejiang University of Technology, Pinghu 314200, China. Electronic address: jingwang@aust.edu.cn.
⁴ School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China. Electronic address: chaozhang@mail.bnu.edu.cn.
⁵ School of Chemical Engineering, Anhui University of Science and Technology, Huainan 232001, China.
⁶ Pinghu Institute of Advanced Materials, Zhejiang University of Technology, Pinghu 314200, China.

PMID: 37385032
DOI: 10.1016/j.jcis.2023.06.131

Abstract

The demand for flexible electromagnetic wave (EMW) absorbing materials has increased, highlighting the importance of designing efficient and adaptable EMW absorbing materials. In this study, flexible Co₃O₄/carbon cloth (Co₃O₄/CC) composites with high EMW absorption properties were prepared via a static growth method and annealing process. The composites exhibited remarkable properties, with the minimum reflection loss (RL_min) and maximum effective absorption bandwidth (EAB, RL ≤ -10 dB) of -54.43 dB and 4.54 GHz, respectively. The flexible carbon cloth (CC) substrates exhibited outstanding dielectric loss due to their conductive networks. Moreover, the uniformly and tightly organized Co₃O₄ arrays on the flexible CC substrate played a crucial role in fine-tuning the impedance matching and facilitating abundant multiple scattering and interface polarization. This study proposes a promising approach to preparing flexible Co₃O₄/CC composites with a significant reference value for the field of flexible EMW.

Keywords: Co-MOFs; Electromagnetic wave absorption; Flexible carbon cloth; Impedance matching.