Constructing magnetic carbon nanofiber composites with magnetic-electric synergistic loss effects for efficient microwave absorption

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-04-21 DOI:10.1016/j.compositesb.2025.112551

Jianhua Zhu , Wei Wang , Qian Zhang , Yinan Fan , Liu Liu , Jianhua Yan , Jianyong Yu

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Abstract

Developing high-performance electromagnetic wave absorption materials is imperative to solve the current electromagnetic wave interference and pollution, but it is still challenging to simultaneously achieve strong absorption and wide absorption microwave bandwidth. Here, we report a polypyrrole decorated magnetic carbon nanofiber (CNF) absorber loaded with core-shell Fe₃C@Fe₃O₄ nanoparticles, that shows magnetic-electric synergistic loss effects for effective microwave absorption. The hierarchical heterostructure and isotropic 3D network are beneficial for achieving high absorption and loss ability via the synergistic effect of impedance matching, multiple polarization, and magnetic-electric coupling. With a small thickness of 2.4 mm and a low filler loading of only 6 wt%, the as-designed microwave absorber exhibits a minimum reflection loss of −55.74 dB and a wide absorption bandwidth of 7.84 GHz involving the entire Ku band. Moreover, the radar cross-section attenuation of the microwave absorber in the vertical direction reaches a high value of 28.04 dB m², showing the ability to attenuate electromagnetic waves in practical applications.

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构建具有磁电协同损耗效应的磁性碳纳米纤维复合材料，提高微波吸收效率

开发高性能电磁波吸收材料是解决当前电磁波干扰和污染的迫切需要，但同时实现强吸收和宽吸收微波带宽仍然是一个挑战。在这里，我们报道了一种聚吡咯修饰的磁性碳纳米纤维（CNF）吸收体，它装载了核壳Fe3C@Fe3O4纳米颗粒，显示了有效吸收微波的磁电协同损失效应。层次化异质结构和各向同性三维网络有利于通过阻抗匹配、多极化和磁电耦合的协同效应获得较高的吸收和损耗能力。设计的微波吸收材料厚度仅为2.4 mm，填充量仅为6 wt%，反射损耗最小为- 55.74 dB，吸收带宽为7.84 GHz，覆盖整个Ku波段。此外，微波吸收器在垂直方向上的雷达截面衰减达到28.04 dB m2的高值，在实际应用中显示出对电磁波的衰减能力。

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.