Abstract
Electromagnetic wave absorption materials are essential for dealing with military stealth and electromagnetic pollution. However, challenges remain in regards to material stability and achieving broadband absorption. Constructing magnetic-dielectric core-shell structural composites with good morphology is one of the effective strategies to realize high-performance electromagnetic wave absorption. Herein, FeCo@SiO2@polypyrrole (PPy) core double-shell nanocomposite with uniform shell thicknesses is synthesized by environmentally friendly polyol method, sol-gel method and in-situ oxidative polymerization method. FeCo@SiO2@PPy nanocomposites with different PPy shell thicknesses were synthesized, and tunable electromagnetic wave absorption had been achieved. The reasonable combination of magnetic and dielectric components and the design of core double-shell structure optimized impedance matching and attenuation characteristics, resulting in strong and broadband electromagnetic wave absorption (minimum reflection loss: -62.7 dB, effective absorption bandwidth: 7.0 GHz). This work could initiate a new insight into the design and modulation of advanced electromagnetic wave absorption materials with strong and broadband absorption properties.
Published Version
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