原位水热合成镍钴合金颗粒@亲水性碳布以构建用于高性能电磁波吸收体的玉米芯状异质结构。
In-situ hydrothermal synthesis of NiCo alloy particles@hydrophilic carbon cloth to construct corncob-like heterostructure for high-performance electromagnetic wave absorbers.
作者信息
Chen Zhihong, Tian Konghu, Zhang Chao, Shu Ruiwen, Zhu Jinbo, Liu Yin, Huang Yanan, Liu Xiaowei
机构信息
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China.
School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan 232001, China; Analysis and Test Center, Anhui University of Science and Technology, Huainan 232001, China; Anhui International Joint Research Center for Nano Carbon-based Materials and Environmental Health, Anhui University of Science and Technology, Huainan 232001, China.
出版信息
J Colloid Interface Sci. 2022 Jun 15;616:823-833. doi: 10.1016/j.jcis.2022.02.086. Epub 2022 Feb 23.
NiCo alloy particles (NiCo-APs)@hydrophilic carbon cloth (HCC) composites were successfully prepared by uniformly decorating magnetic NiCo-APs on the surface of three-dimensional HCC by employing an in-situ hydrothermal method. The NiCo-APs@HCC composites exhibited a unique corncob-like network structure that helped improve the electromagnetic wave (EMW) absorption performance of composites. The EMW absorption properties of the composites could be controlled by altering the Ni/Co molar ratio. The optimal minimum reflection loss (RL) of -41.80 dB was achieved with the NiCo-APs@HCC composite thickness of 2.29 mm. The effective absorption bandwidth (EAB) reached the maximum of 5.8 GHz, spanning nearly the entire Ku band. In addition, the improved EMW absorption performance was further promoted by favorable impedance matching, strong conduction loss, magnetic loss, dipole polarization, interface polarization, multiple reflections, and scattering. A novel strategy for designing magnetic metal/carbon matrix composites with excellent EMW absorption performance is reported in this study.
通过原位水热法将磁性镍钴合金颗粒（NiCo-APs）均匀地装饰在三维亲水碳布（HCC）表面，成功制备了NiCo合金颗粒（NiCo-APs）@亲水碳布（HCC）复合材料。NiCo-APs@HCC复合材料呈现出独特的玉米芯状网络结构，有助于提高复合材料的电磁波（EMW）吸收性能。复合材料的EMW吸收性能可通过改变Ni/Co摩尔比来控制。当NiCo-APs@HCC复合材料厚度为2.29 mm时，实现了-41.80 dB的最佳最小反射损耗（RL）。有效吸收带宽（EAB）达到最大值5.8 GHz，几乎覆盖了整个Ku波段。此外，良好的阻抗匹配、强传导损耗、磁损耗、偶极极化、界面极化、多次反射和散射进一步提升了EMW吸收性能。本研究报道了一种设计具有优异EMW吸收性能的磁性金属/碳基复合材料的新策略。
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