Nanonet encapsulating magnetic nanoparticles with double active layers and high structural stability on carbon fiber for composite interface enhancement and electromagnetic wave absorption

IF 14.2 1区材料科学 Q1 ENGINEERING, MULTIDISCIPLINARY

Composites Part B: Engineering Pub Date : 2025-06-18 DOI:10.1016/j.compositesb.2025.112731

Jinchuan Chen , Jiahao Sun , Huajie Xu , Feng Yang , Yujing Zhang , Ming Huang , Chuntai Liu , Changyu Shen

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Abstract

The structural stability of carbon fiber (CF) surface modification is vital for carbon fiber reinforcement polymer composites with harsh processing environments. To achieve it, CF anchored with magnetic Fe₃O₄ nanoparticles is designed to be encapsulated with an in-situ synthesized MoS₂@CNT-COOH nanonet (MCN). This encapsulation effectively prevents the shedding of Fe₃O₄ nanoparticles during composite processing and guarantee the interface and property stability of the composite. Additionally, this hierarchical structure comprises respective active oxidation layers and significantly boosts the interfacial compatibility and stress transfer between CF and Polyamide 6 (PA6) resin. Consequently, the tensile strength of MCN@Fe₃O₄-CF/PA6 composites is enhanced by 23.9 % compared to those of untreated-CF/PA6 composites. The synergistic effect of the high MCN dielectric loss in the outer layer and the stable Fe₃O₄ magnetic loss layer in the inner layer improves the composite electromagnetic wave (EMW) impedance matching and attenuation ability. The results present a minimum reflection loss value of −65.3 dB at a thinner thickness of 1.6 mm and maximum effective absorption bandwidth reaches 6.76 GHz at a thickness of 1.8 mm. The composite radar cross-section values are less than −10 dBm² at all tested detection angles. This CF surface modification method offers a novel and effective approach to manufacture high performance CF composite EMW absorbers with great stability.

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纳米网络在碳纤维表面封装具有双活性层和高结构稳定性的磁性纳米颗粒，用于复合界面增强和电磁波吸收

碳纤维表面改性的结构稳定性对加工环境恶劣的碳纤维增强聚合物复合材料至关重要。为了实现这一目标，CF锚定与磁性Fe3O4纳米颗粒被设计封装在原位合成MoS2@CNT-COOH纳米网络（MCN）中。这种封装有效地防止了复合材料加工过程中Fe3O4纳米颗粒的脱落，保证了复合材料的界面和性能稳定性。此外，这种分层结构由各自的活性氧化层组成，显著提高了CF和PA6树脂之间的界面相容性和应力传递。结果表明，MCN@Fe3O4-CF/PA6复合材料的抗拉强度比未经处理的cf /PA6复合材料提高了23.9%。外层高MCN介电损耗与内层稳定的Fe3O4磁损耗层的协同作用，提高了复合电磁波（EMW）的阻抗匹配和衰减能力。结果表明，在厚度较薄的1.6 mm处，反射损耗最小值为- 65.3 dB；在厚度为1.8 mm处，有效吸收带宽最大值为6.76 GHz。在所有测试的探测角下，复合雷达截面值均小于−10 dBm2。这种CF表面改性方法为制备高性能、高稳定性的CF复合EMW吸波材料提供了一种新颖有效的方法。

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

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.