Breakthrough in Nanotechnology: Magnetic Iongel/Carbon Nanotube Composites for Ultra-Broadband Electromagnetic Wave Absorption

Strategic Insights -

Researchers at the Wuhan Institute of Technology have made a significant discovery in the field of nanotechnology, developing a new type of magnetic iongel-based composite material that exhibits ultra-broadband electromagnetic wave absorption properties. The innovation, which combines magnetic iongel (C12IMSO3[FeCl4]) with carbon nanotubes (CNTs), has been found to effectively absorb electromagnetic waves in various attenuating routes, including ionic conductive, polarization, and magnetic loss.

Key Takeaways:

  • The magnetic iongel (C12IMSO3[FeCl4]) was successfully fabricated through the self-assembly of an alkyl long-chain imidazolium zwitterion (C12IMSO3) and a magnetic ionic liquid (Bmim[FeCl4]).
  • The C12IMSO3[FeCl4] EW absorber showed a minimum reflect loss (RLmin) of -35 dB and an effective absorption bandwidth (EAB) of 1.8 GHz.
  • The composite material achieved an EAB of 7.44 GHz at a small thickness of 2.2 mm after being combined with CNTs and introducing strong electric conductive loss.
  • The research demonstrated that the ultra-broadband EW absorption performance of the C12IMSO3[FeCl4]/CNT composite transcends many reported inorganic magnetic EW absorbing composites.
  • The study was supported by the National Natural Science Foundation of China (NSFC) and the Science Foundation of Wuhan Institute of Technology.
  • The research team, led by Xueliang Jiang, Wuhan Institute of Technology, included Chenjian Li, Feng Zhao, Junlong Yao, Zhiwei Ye, Yuhen Fu, Chuanxi Xiong, and Shixian Zhang.

Statistics:

  • The effective absorption bandwidth (EAB) of the C12IMSO3[FeCl4] EW absorber was 1.8 GHz.
  • The minimum reflect loss (RLmin) of the C12IMSO3[FeCl4] EW absorber was -35 dB.
  • The EAB of the C12IMSO3[FeCl4]/CNT composite was 7.44 GHz at a small thickness of 2.2 mm.
  • The study demonstrated that the C12IMSO3[FeCl4]/CNT composite outperformed many reported inorganic magnetic EW absorbing composites.

Sources:

  • NewsRx. New Findings from Wuhan Institute of Technology in Carbon Nanotubes Provides New Insights (Magnetic Iongel/carbon Nanotube Composites for Ultra-broadband Electromagnetic Wave Absorption). Journal of Engineering. October 20, 2025; p 2196.
  • Magnetic Iongel/carbon Nanotube Composites for Ultra-broadband Electromagnetic Wave Absorption. Journal of Materials Chemistry C, 2025.
  • Royal Soc Chemistry, Thomas Graham House, Science Park, Milton Rd, Cambridge CB4 0WF, Cambs, England.