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Bioinspired Hierarchical Composite for Multiband Defense.

Zhihan Gao1, Yunan Shi1, Lixia Ma1

  • 1School of Materials Science and Engineering, Tongji University, Shanghai 201804, P. R. China.

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|September 4, 2024
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Summary
This summary is machine-generated.

Researchers developed a novel MXene/NiFe2O4/calcined melamine foam (MNC) composite for advanced defense applications. This material offers efficient electromagnetic microwave absorption, infrared stealth, and solar absorption, adaptable to various conditions.

Keywords:
Ti3C2Tx MXenebionic materialinfrared stealthmicrowave absorptionmultidimensional microstructuresolar absorption

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Electromagnetics

Background:

  • Optimizing electromagnetic microwave absorbing (EMA) materials for radar stealth is crucial for defense.
  • Current EMA materials face challenges in meeting multi-frequency band requirements in complex environments.

Purpose of the Study:

  • To design and prepare a hierarchical composite with enhanced microwave absorption, infrared stealth, and solar absorption.
  • To investigate the synergistic effects of components and microstructure on material performance.
  • To explore ambient-temperature-adaptive stealth capabilities.

Main Methods:

  • Fabrication of a hierarchical MXene/NiFe2O4/calcined melamine foam (MNC) composite inspired by cytoskeleton-organelle structure.
  • Characterization of microwave absorption, infrared stealth, and solar absorption properties.
  • Evaluation of environmental adaptability including photothermal conversion, lightness, elasticity, and hydrophobicity.

Main Results:

  • The MNC composite achieved a minimum reflection loss of -58.57 dB and an effective absorption bandwidth (EAB) of 7.00 GHz.
  • Demonstrated stable infrared stealth from 37 °C to 300 °C and high solar absorptivity up to 96.2%.
  • Exhibited excellent environmental adaptability, including photothermal conversion, lightness, elasticity, and hydrophobicity.

Conclusions:

  • The developed MNC composite shows significant promise as a multispectrum defense material.
  • Its tunable properties and environmental adaptability make it suitable for radar, infrared, and visible light stealth applications.
  • The material is ideal for various equipment, clothing, and wearables in harsh conditions.