J. Mater. Sci. Technol. ›› 2023, Vol. 151: 109-118.DOI: 10.1016/j.jmst.2022.12.022

• Research Article • Previous Articles     Next Articles

Controllable coating NiAl-layered double hydroxides on carbon nanofibers as anticorrosive microwave absorbers

Ying Zhanga,b, Liang Lib, Changlong Dua,b, Gengping Wana,b,*, Qiyi Weia,b, Xueqing Zhoua, Yanran Sub, Yang Xua,b, Guizhen Wanga,b,*   

  1. aState Key Laboratory of Marine Resource Utilization in South China Sea, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China;
    bCollaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, China
  • Received:2022-11-07 Revised:2022-12-11 Accepted:2022-12-13 Published:2023-07-10 Online:2023-02-11
  • Contact: * E-mail addresses: wangengping001@163.com (G. Wan),wangguizhen0@hotmail.com (G. Wang).

Abstract: For harsh real-world service settings, it is essential to build corrosion-resistant, diverse, and effective microwave absorbers. Herein, we successfully prepared a 3D NiAl-layered double hydroxide/carbon nanofibers (NiAl-LDH/CNFs) composite material as an anticorrosive microwave absorber assisted by an atomic layer deposition (ALD) method. The size, coating thickness, and content of NiAl-LDH can be readily adjusted by changing the ALD cycling numbers. The optimized NiAl-LDH/CNFs demonstrates prominent microwave absorbing properties including the strongest reflection loss of -55.65 dB and the widest effective absorption bandwidth of 4.80 GHz with only 15 wt% loading. The reasons for performance improvement are the cooperative effect of interfacial polarization loss, conduction loss, and three-dimensional porous structure. Moreover, due to the synergistic effects between the excellent impermeability of CNFs and the trapping ability of NiAl-LDH for chloride ions, NiAl-LDH/CNFs exhibits strong corrosion resistances under acidic, neutral, and alkaline conditions. NiAl-LDH/CNFs should be a potential candidate to simultaneously use for microwave absorption and corrosion resistance, and this work provides a certain guiding significance for designing microwave absorbers that satisfy the corrosion resistance.

Key words: Microwave absorption, Anticorrosion, Atomic layer deposition (ALD), Double layered hydroxides (LDHs), Carbon nanofibers (CNFs)