Aramid nanofibers-assisted graphite films for efficient electromagnetic interference shielding

IF 12.7 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-02-11 DOI:10.1016/j.compositesb.2025.112269

Yi-Ke Li , Meng-Xin Liu , Chun-Yang Li , Kun-Peng Cui , Liang-Bin Li , Li-Chuan Jia

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Abstract

Micro-scale graphite has significant application prospects in electromagnetic interference (EMI) shielding compared with conductive nanomaterials (such as graphene, carbon nanotube, and MXene), owing to its low cost, scalability, and large crystalline size. However, the challenges of poor dispersion and film-formation of micro-scale graphite hinder the preparation of highly conductive self-standing graphite-based films. In this study, we effectively solve the dispersion and film-formation issues of micro-scale graphite by introducing a small amount (10 wt%) of aramid nanofibers (ANF), which benefites from the great aspect ratio and high specific surface area of ANF. The resulting graphite/ANF films achieve an ultra-high conductivity of 5323.7 S/m, and their EMI shielding effectiveness (EMI SE) reaches 38.9 dB at a thickness of only 30 μm within the frequency range of 8.2–12.4 GHz. In addition, the graphite/ANF films demonstrate excellent mechanical flexibility, thermal stability, and flame retardancy. This study provides a pathway for assembling micro-scale graphite into highly conductive self-standing films, highlighting their significant potential for EMI shielding applications in electronic equipment.

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来源期刊

Composites Part B: Engineering 工程技术-材料科学：复合

CiteScore

24.40

自引率

11.50%

发文量

784

审稿时长

21 days

期刊介绍： Composites Part B: Engineering is a journal that publishes impactful research of high quality on composite materials. This research is supported by fundamental mechanics and materials science and engineering approaches. The targeted research can cover a wide range of length scales, ranging from nano to micro and meso, and even to the full product and structure level. The journal specifically focuses on engineering applications that involve high performance composites. These applications can range from low volume and high cost to high volume and low cost composite development. The main goal of the journal is to provide a platform for the prompt publication of original and high quality research. The emphasis is on design, development, modeling, validation, and manufacturing of engineering details and concepts. The journal welcomes both basic research papers and proposals for review articles. Authors are encouraged to address challenges across various application areas. These areas include, but are not limited to, aerospace, automotive, and other surface transportation. The journal also covers energy-related applications, with a focus on renewable energy. Other application areas include infrastructure, off-shore and maritime projects, health care technology, and recreational products.