Multiple synergistic effects of structural coupling and dielectric-magnetic loss in promoting microwave absorption of bark-derived absorbers

IF 21.8 2区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES Advanced Composites and Hybrid Materials Pub Date : 2025-02-01 DOI:10.1007/s42114-025-01233-0

Dongyi Lei, Chengkan Liu, Sijia Wang, Peng Zhang, Ying Li, Donglei Yang, Yihan Jin, Zhenxin Liu, Chunlei Dong

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Abstract

The explode development of global automation and digitization brings increasing electromagnetic radiation, threatening information security and health. Biomass wave-absorbing materials stand out among massive absorbers due to their green and environmentally friendly features, yet remains severe challenge in equilibration between impedance matching and efficient loss ability. Herein, this work innovatively used waste bark which amounts up to 400 million cubic meters generated from forest as carbon precursor. The FeCo@C nanocomposites derived from FeCo-MOF precursor are introduced on the surface of bark-derived carbon pore using vacuum impregnation and carbonization methods, and tree bark-derived porous carbon (TPC)/FeCo@C composites are successfully fabricated. The unique hierarchical structure composed of three-dimensional (3D) parallel pore structure of bark-derived carbon and yolk-shell structure of FeCo@C favors to optimizing impedance matching and prolonging attenuation paths of microwaves. Additionally, the introduction of FeCo@C can promote interface polarization loss, as well as enhance synergistic effects of dielectric-magnetic losses. Multiple synergistic effects of structural coupling and dielectric-magnetic loss endow TPC/FeCo@C composite attractive absorbing ability. The optimized TPC/FeCo@C-5 exhibits a minimum reflection loss (RL_min) of − 61.04 dB and the effective bandwidth (EAB) of 7.25 GHz at a matching thickness of 2.64 mm, which is superior to most biomass-based absorbers. Apparently, this work presents a valuable concept for the secondary utilization of discarded bark in the domain of microwave absorption, which is significant for achieving energy saving and environmental protection and addressing electromagnetic pollution.

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结构耦合和介电损耗在促进树皮源吸收剂微波吸收中的多重协同效应

全球自动化和数字化的爆炸式发展带来了越来越大的电磁辐射，威胁着信息安全和健康。生物质吸波材料以其绿色环保的特点在大量吸波材料中脱颖而出，但在阻抗匹配和高效损耗能力之间的平衡方面仍面临严峻挑战。本研究创新性地利用森林产生的高达4亿立方米的废树皮作为碳前体。采用真空浸渍和碳化的方法，在树皮衍生碳孔表面制备了feo - mof前驱体FeCo@C纳米复合材料，成功制备了树皮衍生多孔碳(TPC)/FeCo@C复合材料。树皮衍生碳的三维平行孔结构与FeCo@C的蛋黄壳结构组成的独特层次结构有利于优化阻抗匹配和延长微波衰减路径。此外，FeCo@C的引入可以促进界面极化损耗，增强介磁损耗的协同效应。结构耦合和介质损耗的多重协同效应赋予TPC/FeCo@C复合材料吸引吸波能力。优化后的TPC/FeCo@C-5在匹配厚度为2.64 mm时，最小反射损耗（RLmin）为−61.04 dB，有效带宽（EAB）为7.25 GHz，优于大多数生物质基吸收材料。显然，这项工作为废弃树皮在微波吸收领域的二次利用提供了一个有价值的概念，这对于实现节能环保和解决电磁污染具有重要意义。

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麦克林

2-methylimidazole

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Fe(NO3)3?9H2O

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Co(NO3)2?6H2O

来源期刊

Advanced Composites and Hybrid Materials Multiple-

CiteScore

26.00

自引率

21.40%

发文量

185

期刊介绍： Advanced Composites and Hybrid Materials is a leading international journal that promotes interdisciplinary collaboration among materials scientists, engineers, chemists, biologists, and physicists working on composites, including nanocomposites. Our aim is to facilitate rapid scientific communication in this field. The journal publishes high-quality research on various aspects of composite materials, including materials design, surface and interface science/engineering, manufacturing, structure control, property design, device fabrication, and other applications. We also welcome simulation and modeling studies that are relevant to composites. Additionally, papers focusing on the relationship between fillers and the matrix are of particular interest. Our scope includes polymer, metal, and ceramic matrices, with a special emphasis on reviews and meta-analyses related to materials selection. We cover a wide range of topics, including transport properties, strategies for controlling interfaces and composition distribution, bottom-up assembly of nanocomposites, highly porous and high-density composites, electronic structure design, materials synergisms, and thermoelectric materials. Advanced Composites and Hybrid Materials follows a rigorous single-blind peer-review process to ensure the quality and integrity of the published work.