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具有优异微波吸收性能的FeO纳米颗粒/碳化麻纤维复合材料的制备

Preparation of an FeO Nanoparticle/Carbonized Hemp Fiber Composite with Superior Microwave Absorption Performance.

作者信息

Li Wanxi, Li Boqiong, Zhao Yali, Wang Yingfen, Liang Hengliang, Lv Baoliang

机构信息

Department of Materials Science and Engineering, Jinzhong University, Jinzhong 030619, P. R. China.

AVIC Composite Corporation Ltd., Beijing 101300, P. R. China.

出版信息

ACS Omega. 2024 Nov 23;9(49):48460-48470. doi: 10.1021/acsomega.4c07063. eCollection 2024 Dec 10.

DOI:10.1021/acsomega.4c07063
PMID:39676989
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11635500/
Abstract

The increasing concern over the negative impact of electromagnetic radiation and interference on humans has led to a growing interest in microwave-absorbing materials that are cost-effective, have a wide frequency range, and have high efficiency. In this paper, an FeO nanoparticle/carbonized hemp fiber composite was successfully prepared using hemp fibers as the primary material and template. By carefully regulating the concentration of the iron nitrate impregnation solution, accurate loading of FeO nanoparticles onto the carbonized hemp fiber was achieved. Due to its unique porous structure, the balance between impedance matching, and electromagnetic loss, the prepared FeO nanoparticle/carbonized hemp fiber composite exhibits light weight, high absorption strength, and broadband absorption characteristics. The broadest absorption bandwidth of 6.1 GHz can be achieved, covering the entire Ku-band, and the minimum refection loss is as low as -49.7 dB. More interestingly, the Fe3O4 nanoparticle/carbonized hemp fiber composite exhibits attractive microwave absorption performance in both the X-band and Ku-band even with a wide range of FeO nanoparticle loading. Furthermore, simulations of the radar cross section (RCS) have confirmed that the FeO nanoparticle/carbonized hemp fiber composite is effective in attenuating electromagnetic waves in a real environment. This work presents an economical and efficient method for the development of porous carbon-based absorbents.

摘要

人们对电磁辐射和干扰对人类的负面影响日益关注，这使得人们对具有成本效益、宽频率范围和高效率的微波吸收材料越来越感兴趣。在本文中，以麻纤维为主要原料和模板，成功制备了FeO纳米颗粒/碳化麻纤维复合材料。通过仔细调节硝酸铁浸渍溶液的浓度，实现了FeO纳米颗粒在碳化麻纤维上的精确负载。由于其独特的多孔结构、阻抗匹配和电磁损耗之间的平衡，所制备的FeO纳米颗粒/碳化麻纤维复合材料具有重量轻、吸收强度高和宽带吸收特性。可以实现6.1 GHz的最宽吸收带宽，覆盖整个Ku波段，最小反射损耗低至-49.7 dB。更有趣的是，即使在FeO纳米颗粒负载范围很宽的情况下，Fe3O4纳米颗粒/碳化麻纤维复合材料在X波段和Ku波段均表现出有吸引力的微波吸收性能。此外，雷达散射截面（RCS）模拟证实，FeO纳米颗粒/碳化麻纤维复合材料在实际环境中对电磁波具有有效的衰减作用。这项工作为开发多孔碳基吸收剂提供了一种经济有效的方法。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58f2/11635500/0ac1fd04b9e6/ao4c07063_0011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/58f2/11635500/28c5f7e19c85/ao4c07063_0007.jpg
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