论文成果
Constructing core-shell carbon fiber/polypyrrole/CoFe<sub>2</sub>O<sub>4</sub> nanocomposite with optimized conductive loss and polarization loss toward efficient electromagnetic absorption
- 发布时间：2024-12-23
- 点击次数：
- 关键字：ENHANCED MICROWAVE-ABSORPTION; DIELECTRIC-PROPERTIES; COMPOSITES; PERFORMANCE; NANOPARTICLES; FABRICATION; FIBERS
- 摘要：The inadequate impedance matching and weak attenuation capability for incident electromagnetic waves exhibited by carbon fibers (CF) are critical factors limiting their application served as absorbing materials. Constructing a nanocomposite system that simultaneously exhibits both dielectric loss and magnetic loss characteristics is a feasible strategy to overcome these limitations. In the present study, a core-shell CF@PPy@CoFe2O4 nanocomposite is fabricated through electrodeposition and subsequent hydrothermal methods to enhance the attenuation capacity and impedance matching of bare CF. Under the synergistic effects of diverse components and a peculiar network structure, the nanocomposite demonstrates optimized conductive loss and polarization loss, which results in a remarkable electromagnetic wave absorption performance with a minimum reflection loss (RLmin) of -55.33 dB and an effective absorption bandwidth (EAB) of 6.48 GHz (12 similar to 18 GHz) at optimal thicknesses of 2.11 and 2.42 mm, respectively, suggesting its promising application as a candidate absorber. More importantly, the exploration concerning the absorption mechanism provides significant insights into the attenuation modes of the dielectric-magnetic loss hetero-junction, which is beneficial for developing similar absorbing materials.
- 卷号：7
- 期号：2
- 是否译文：否
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