宽带高吸收电磁屏蔽用柔性三层石墨烯复合材料

IF 8.3 1区材料科学 Q1 MATERIALS SCIENCE, COMPOSITES

Composites Science and Technology Pub Date : 2025-02-14 DOI:10.1016/j.compscitech.2025.111108

Mehran Ashouri-Sanjani , Reza Rahmati , Mahdi Hamidinejad , Chul B. Park

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引用次数: 0

摘要

电磁干扰（EMI）在当今的电子产品中提出了重大挑战，破坏设备性能并构成健康风险。我们介绍了一种新颖的柔性复合材料，具有卓越的电磁干扰屏蔽效能和在ku波段（12.4-18 GHz）的吸收主导性能。该复合材料具有精心设计的三层结构：两层具有排列孔隙的还原氧化石墨烯（rGO）气凝胶和致密的氧化石墨烯膜，均嵌入聚二甲基硅氧烷（PDMS）基质中。该设计在最小厚度为2.5 mm的情况下实现了95.4%的平均吸光度和42.6 dB的总屏蔽效率。优异的性能源于对每层电导率的细致调整，优化阻抗匹配，并通过多种反射和散射机制增强电磁吸收。有限元模拟分析了多层结构内部的电磁相互作用，验证了设计的有效性。这项工作开创了下一代EMI屏蔽材料的发展，这些材料协同结合了高吸收率、机械灵活性和强大的性能，满足了现代电子产品的苛刻要求。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Flexible triple-layer graphene composites for broadband high-absorption electromagnetic shielding

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Flexible triple-layer graphene composites for broadband high-absorption electromagnetic shielding

Electromagnetic interference (EMI) presents significant challenges in today's electronics, disrupting device performance and posing health risks. We introduce a novel flexible composite with exceptional EMI shielding effectiveness and absorption-dominated performance across the Ku-band (12.4–18 GHz). The composite features a strategically engineered triple-layer architecture: two layers of reduced graphene oxide (rGO) aerogels with aligned porosities and a dense rGO film, all embedded within a polydimethylsiloxane (PDMS) matrix. This design achieves an outstanding average absorptivity of 95.4 % and a total shielding effectiveness of 42.6 dB within a minimal thickness of 2.5 mm. The superior performance arises from meticulous tuning of each layer's electrical conductivity, optimizing impedance matching and enhancing electromagnetic absorption through multiple reflection and scattering mechanisms. Finite element method simulations elucidate the electromagnetic interactions within the multilayer structure, confirming the effectiveness of our design. This work pioneers the development of next-generation EMI shielding materials that synergistically combine high absorptivity, mechanical flexibility, and robust performance, meeting the demanding requirements of modern electronics.

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来源期刊

Composites Science and Technology 工程技术-材料科学：复合

CiteScore

16.20

自引率

9.90%

发文量

611

审稿时长

33 days

期刊介绍： Composites Science and Technology publishes refereed original articles on the fundamental and applied science of engineering composites. The focus of this journal is on polymeric matrix composites with reinforcements/fillers ranging from nano- to macro-scale. CSTE encourages manuscripts reporting unique, innovative contributions to the physics, chemistry, materials science and applied mechanics aspects of advanced composites. Besides traditional fiber reinforced composites, novel composites with significant potential for engineering applications are encouraged.