Design and evaluation of graphene reinforced polymer nanocomposite EMI shielding effectiveness through component level studies

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-05-08 DOI:10.1016/j.vacuum.2025.114396

K.V. Lavanya , Sasidhar Gurugubelli , Jyothi Budida , Premkumar G , Javed Syed

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引用次数: 0

Abstract

Graphene-reinforced polymer nanocomposites, particularly those incorporating graphene, are emerging as effective materials for enhancing electromagnetic (EM) shielding in conventional concrete walls, which is vital for applications such as anechoic chambers. This research uniquely assesses how the addition of this composite influences the wave absorption and impedance matching characteristics of concrete, aiming to improve shielding effectiveness against electromagnetic interference (EMI). The study finds that while higher concentrations of graphene generally enhance EMI shielding, the 2.5 % PU/graphene composite significantly reduces shielding effectiveness at certain frequencies, particularly within the 10–11 GHz range. It highlights a critical limitation at a relatively low loading level, despite the overall improved performance observed through the simulation studies with deeper embedding and multi-layer nanocomposites. The findings highlight the necessity for a detailed approach to practical implementations in structural electromagnetic shielding, as the calculations indicate that PU/graphene-modified concrete walls may provide enhanced electromagnetic wave absorption.

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基于组分水平研究的石墨烯增强聚合物纳米复合材料电磁干扰屏蔽效能设计与评价

石墨烯增强聚合物纳米复合材料，特别是那些含有石墨烯的材料，正在成为增强传统混凝土墙壁电磁屏蔽的有效材料，这对消声室等应用至关重要。本研究独特地评估了这种复合材料的添加如何影响混凝土的波吸收和阻抗匹配特性，旨在提高对电磁干扰（EMI）的屏蔽效果。研究发现，虽然较高浓度的石墨烯通常会增强电磁干扰屏蔽，但2.5%的PU/石墨烯复合材料会显著降低某些频率下的屏蔽效果，特别是在10-11 GHz范围内。尽管通过更深嵌入和多层纳米复合材料的模拟研究观察到整体性能的改善，但它强调了在相对低负载水平下的关键限制。研究结果强调了在结构电磁屏蔽中详细实施方法的必要性，因为计算表明PU/石墨烯改性混凝土墙可能提供增强的电磁波吸收。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.