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MOF Derivatives Anchored to Multichannel Hollow Carbon Fibers with Gradient Structures for Corrosion Resistance and Efficient Electromagnetic Wave Absorption

Journal of Materials Science & Technology(2025)SCI 1区

Hubei Univ Automot Technol

Cited 28|Views10
Abstract
With the rapid development of 5G technology and the interconnection of industrial production, electromagnetic pollution has become a serious problem. Achieving lightweight and controllable loads of absorbers while obtaining corrosion-resistant absorbers with high electromagnetic response properties is still considered a huge challenge. In this work, carbon fiber with a multichannel hollow structure is obtained by PAN/PS hybrid electrospinning and subsequent high-temperature roasting process. The spatial structure inside the carbon fiber plays an active role in optimizing the impedance matching characteristics of the absorber. In addition, bimetallic metal-organic frameworks (MOFs) derivatives are obtained by a precisely controlled ion exchange as well as a high-temperature gas-phase selenization process. The resulting introduction of a non-homogeneous interface induces interfacial polarization and improves the absorption behavior of the absorber. The analysis of the experimental results shows that the electromagnetic wave (EMW) absorption performance can be effectively enhanced due to the mechanisms of interface polarization and dipole polarization. The prepared NiSe/ZnSe/MHCFs composite can obtain excellent EMW absorption properties in C, X, and Ku bands by adjusting the thickness. Structural design and component modulation play a crucial role in realizing the strong absorption and wide bandwidth of the absorber. Radar cross-section calculations indicate that NiSe/ZnSe/MHCFs have tremendous potential in practical military stealth technology. And the prepared composite coating can provide periodic corrosion resistance to Q235 steel sheet when dealing with complex and extreme environments. (c) 2024 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
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Key words
Electrostatic spinning,Heterojunction,Electromagnetic waves absorption,Periodic corrosion protection
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要点】:研究开发了一种具有多通道空心结构的碳纤维负载金属有机框架(MOF)衍生物,实现了高效的电磁波吸收性能和优异的耐腐蚀性能。

方法】:采用PAN/PS混合静电纺丝和后续高温烘烤过程制备多通道空心碳纤维,通过精确控制的离子交换及高温气相硒化过程制备双金属MOF衍生物。

实验】:使用NiSe/ZnSe/MHCFs复合物进行实验,数据集名称未提及。实验结果表明,该复合材料在C、X、Ku波段具有出色的电磁波吸收性能,并可通过对厚度的调整进行优化,同时提供了对Q235钢板的周期性腐蚀防护。