用于高效电磁屏蔽的多孔氮掺杂还原氧化石墨烯复合膜

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING

Composites Part A: Applied Science and Manufacturing Pub Date : 2025-04-12 DOI:10.1016/j.compositesa.2025.108942

Tong Gao , Hui Zhao , Jie Kong , Qiang Zhuang , Xiaochen Liu , Yuelin Lv , Ye Ou , Lixin Chen

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引用次数: 0

摘要

石墨烯薄膜被视为下一代电磁干扰（EMI）屏蔽材料。然而，石墨烯薄膜有限的内部损耗机制限制了其电磁干扰屏蔽性能。本研究以 GO 和微米级 ZIF-8 颗粒为氮源和模板，通过真空过滤和高温退火工艺制备了多孔氮掺杂还原氧化石墨烯（多孔 N-rGO）复合薄膜。退火后，微米级的 ZIF-8 同时将 N 杂原子引入到 rGO 的高效导电网络中，并形成多层次的孔隙结构，从而协同提高了复合薄膜的屏蔽性能。多孔 N-rGO 复合薄膜在 X 波段的 EMI 屏蔽效果达到 45.6 dB（48 μm），绝对屏蔽效果为 35500.7 dB/cm2-g。此外，带有 PDMS 涂层的多孔 N-rGO 复合薄膜具有出色的柔韧性和长期耐用性。这种柔性高性能 EMI 屏蔽复合膜在可穿戴电子设备和航空航天领域具有巨大的应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Porous nitrogen-doped reduced graphene oxide composite films for efficient electromagnetic shielding

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Porous nitrogen-doped reduced graphene oxide composite films for efficient electromagnetic shielding

Graphene films are regarded as the next-generation electromagnetic interference (EMI) shielding material. However, the limited internal loss mechanisms in graphene films constrain their EMI shielding performance. In this work, porous nitrogen-doped reduced graphene oxide (porous N-rGO) composite films are prepared by vacuum filtration and a high-temperature annealing process using GO and micron-sized ZIF-8 particles as N source and template. After annealing, micron-sized ZIF-8 simultaneously introduces N heteroatoms into the efficient conductive network of rGO and creates a multi-level pore structure, which synergistically improves the shielding performance of composite films. The EMI shielding effectiveness of porous N-rGO composite film reaches 45.6 dB (48 μm) in the X-band, with an absolute shielding effectiveness of 35500.7 dB/cm²·g. Additionally, the porous N-rGO composite film with PDMS coating exhibits excellent flexibility and long-term durability. This flexible, high-performance EMI shielding composite film demonstrates great application potential in wearable electronic devices and aerospace fields.

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来源期刊

Composites Part A: Applied Science and Manufacturing 工程技术-材料科学：复合

CiteScore

15.20

自引率

5.70%

发文量

492

审稿时长

30 days

期刊介绍： Composites Part A: Applied Science and Manufacturing is a comprehensive journal that publishes original research papers, review articles, case studies, short communications, and letters covering various aspects of composite materials science and technology. This includes fibrous and particulate reinforcements in polymeric, metallic, and ceramic matrices, as well as 'natural' composites like wood and biological materials. The journal addresses topics such as properties, design, and manufacture of reinforcing fibers and particles, novel architectures and concepts, multifunctional composites, advancements in fabrication and processing, manufacturing science, process modeling, experimental mechanics, microstructural characterization, interfaces, prediction and measurement of mechanical, physical, and chemical behavior, and performance in service. Additionally, articles on economic and commercial aspects, design, and case studies are welcomed. All submissions undergo rigorous peer review to ensure they contribute significantly and innovatively, maintaining high standards for content and presentation. The editorial team aims to expedite the review process for prompt publication.