Structure-enhanced ultra-high EMI shielding in corrugated recycled carbon fiber felts

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-09-30 DOI:10.1016/j.vacuum.2025.114790

Daxing Cai, Yue Feng, Jiajun He, Xiaoying Wang, Wei Yu, Qiaole Hu, Zhenzhen Xu

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引用次数: 0

Abstract

The rapid advancement of electronic information technology has led to a significant increase in electromagnetic radiation from electronic devices, posing potential threats to human health. Developing lightweight, high-performance, and green electromagnetic interference (EMI) shielding materials is crucial for mitigating electromagnetic pollution. Herein, uniformly dispersed recycled carbon fiber corrugated felt (rCCFF) was fabricated via wet-laid technology combined with structural design. Results demonstrate that the corrugated structure significantly enhances the shielding effectiveness (EMI SE). Optimal EMI SE of 46 dB was achieved when the corrugation direction was parallel (0°) to the polarization direction of the electromagnetic field, representing a 29.6 % improvement over the planar structure. Reducing the corrugation diameter to 1.2 mm enhanced multiple reflections and interfacial polarization, further increasing the EMI SE to 55.26 dB. Moreover, the double-layer stacked structure forms numerous miniature air cavities, effectively exciting multiple reflections and creating multi-scale resonant coupling, thereby achieving an excellent EMI SE of up to 68.5 dB.

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结构增强的超高电磁干扰屏蔽波纹再生碳纤维毡

电子信息技术的迅速发展导致电子设备产生的电磁辐射显著增加，对人体健康构成潜在威胁。开发轻质、高性能、绿色的电磁干扰（EMI）屏蔽材料是减轻电磁污染的关键。本文采用湿铺技术与结构设计相结合的方法制备了均匀分散的再生碳纤维波纹毡。结果表明，波纹结构显著提高了屏蔽效能。当波纹方向与电磁场极化方向平行（0°）时，EMI SE为46 dB，比平面结构提高29.6%。将波纹直径减小到1.2 mm，增强了多次反射和界面极化，进一步将EMI SE提高到55.26 dB。此外，双层堆叠结构形成了许多微型空腔，有效地激发了多次反射，形成了多尺度谐振耦合，从而实现了高达68.5 dB的优异EMI SE。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.