溶胀处理轻质宽带电磁波吸收多孔碳的吸收性能及机理

文江豪; 兰笛; 王益群; 任良贵; 冯爱玲; 贾梓睿; 吴广磊

doi:10.1007/s12613-024-2881-0

Volume 31 Issue 7

Jul. 2024

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(7): 1701-1712

Jianghao Wen, Di Lan, Yiqun Wang, Lianggui Ren, Ailing Feng, Zirui Jia, and Guanglei Wu, Absorption properties and mechanism of lightweight and broadband electromagnetic wave-absorbing porous carbon by the swelling treatment, Int. J. Miner. Metall. Mater., 31(2024), No. 7, pp. 1701-1712. https://doi.org/10.1007/s12613-024-2881-0

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Jianghao Wen, Di Lan, Yiqun Wang, Lianggui Ren, Ailing Feng, Zirui Jia, and Guanglei Wu, Absorption properties and mechanism of lightweight and broadband electromagnetic wave-absorbing porous carbon by the swelling treatment, Int. J. Miner. Metall. Mater., 31(2024), No. 7, pp. 1701-1712. https://doi.org/10.1007/s12613-024-2881-0

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研究论文

溶胀处理轻质宽带电磁波吸收多孔碳的吸收性能及机理

1)
成都理工大学材料与化学化工学院, 成都 610059, 中国
2)
湖北汽车工业学院材料科学与工程学院, 十堰 442002, 中国
3)
青岛大学材料科学与工程学院, 生物多糖纤维成形与生态纺织国家重点实验室, 能源与环境材料研究院，青岛 266071, 中国
4)
宝鸡文理学院物理与光电技术学院, 宝鸡 721016, 中国

通讯作者:
王益群 E-mail: wangyiqun17@cdut.edu.cn

吴广磊 E-mail: wuguanglei@qdu.edu.cn

文章亮点

(1) 利用氢氧化钾活化溶胀诱导法获得了三维生物多孔碳材料

(2) 在厚度为2.1 mm时，高密度聚碳酸酯的吸声强度为−47.34 dB

(3) 最宽的有效吸收带宽达到7.0 GHz（厚度为2.2 mm），覆盖了整个Ku波段

(4) 分析了碳化温度和膨胀率对HPC微波吸收特性的影响

中文摘要

生物碳材料因其可重复性和环境友好性，在微波吸收和屏蔽领域引起了广泛关注。本研究采用溶胀诱导法将KOH均匀分布在生物质银耳上，通过碳化制备出三维网络结构的分层多孔碳（HPC）。在厚度为2.1 mm的情况下，微波吸收强度达到−47.34 dB。值得注意的是，在匹配厚度为2.2 mm时，有效吸收带宽达到7.0 GHz（11~18 GHz）。优异的宽带和反射损耗性能归功于三维多孔网络、界面效应、碳网络缺陷和偶极弛豫。HPC因其出色的阻抗匹配和高衰减常数而具有出色的吸收特性。均匀的孔隙结构大大优化了材料的阻抗匹配性能，而丰富的界面和缺陷则增加了介电损耗，从而提高了衰减常数。此外，还系统研究了碳化温度和膨胀率对微波吸收性能的影响。这项研究提出了一种利用生物质衍生HPC制备吸收材料的策略，在电磁波吸收领域展现了巨大的潜力。

关键词:

Research Article

Absorption properties and mechanism of lightweight and broadband electromagnetic wave-absorbing porous carbon by the swelling treatment

+ Author Affiliations

1)
College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
2)
School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, China
3)
Institute of Materials for Energy and Environment, State Key Laboratory of Bio-fibers and Eco-textiles, College of Materials Science and Engineering, Qingdao University, Qingdao 266071, China
4)
Institute of Physics & Optoelectronics Technology, Baoji University of Arts and Sciences, Baoji 721016, China

Guanglei Wu is editorial board members for this journal and not involved in the editorial review or the decision to publish this article. All authors declare that they have no financial interests or personal relationships that could have appeared to influence the work reported in this paper.
The online version contains supplementary material available at https://doi.org/10.1007/s12613-024-2881-0

Corresponding authors:
Yiqun Wang E-mail: wangyiqun17@cdut.edu.cn

Guanglei Wu E-mail: wuguanglei@qdu.edu.cn
Received: 5 September 2023; Revised: 9 March 2024; Accepted: 13 March 2024; Available online: 15 March 2024

Abstract

Abstract

Bioderived carbon materials have garnered considerable interest in the fields of microwave absorption and shielding due to their reproducibility and environmental friendliness. In this study, KOH was evenly distributed on biomass Tremella using the swelling induction method, leading to the preparation of a three-dimensional network-structured hierarchical porous carbon (HPC) through carbonization. The achieved microwave absorption intensity is robust at −47.34 dB with a thin thickness of 2.1 mm. Notably, the widest effective absorption bandwidth, reaching 7.0 GHz (11–18 GHz), is attained at a matching thickness of 2.2 mm. The exceptional broadband and reflection loss performance are attributed to the 3D porous networks, interface effects, carbon network defects, and dipole relaxation. HPC has outstanding absorption characteristics due to its excellent impedance matching and high attenuation constant. The uniform pore structures considerably optimize the impedance-matching performance of the material, while the abundance of interfaces and defects enhances the dielectric loss, thereby improving the attenuation constant. Furthermore, the impact of carbonization temperature and swelling rate on microwave absorption performance was systematically investigated. This research presents a strategy for preparing absorbing materials using biomass-derived HPC, showcasing considerable potential in the field of electromagnetic wave absorption.
- biomass;
- hierarchical porous carbon;
- dielectric loss;
- electromagnetic wave absorption

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溶胀处理轻质宽带电磁波吸收多孔碳的吸收性能及机理

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Absorption properties and mechanism of lightweight and broadband electromagnetic wave-absorbing porous carbon by the swelling treatment

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