Entire X broadband and high-performance electromagnetic wave absorbing nickel/liquid metal/graphene oxide/bacterial cellulose composite films

IF 2.8 4区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Materials Science: Materials in Electronics Pub Date : 2025-01-17 DOI:10.1007/s10854-024-14188-7
Mengxia Guo, Xiaoqin Guo, Huicong Niu, Zhongyi Bai, Shuaike Li, Yumei Ren, Hao Zhang, Jiushuai Deng
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Abstract

The development of X band (8.2–12.4 GHz) electromagnetic wave (EMW) absorbing materials with small thickness and effective absorption bandwidth is crucial for the advancement of portable electronic devices and stealth materials. This study uses an ultrasonic approach and electrostatic self-assembly to create a three-dimensional network structured film, integrating points (liquid metal, LM; nickel particles, Ni), lines (bacterial cellulose, BC), and surfaces (graphene oxide, GO) through vacuum filtration and freeze-drying. In the Ni/LM/GO/BC composite films, BC and GO serve as “donors” for LM anchoring and packaging, while also providing the basic “skeleton” or “grid” for constructing the three-dimensional structures. This resulted in the formation of numerous heterogeneous interfaces and conductive networks among BC, GO, and the metal particles. The GO/BC (GB) film exhibits poor electromagnetic wave absorption performance and does not meet the required standards. However, when LM was added alone, the performance improved, and the EAB extended across the X band. The introduction of magnetic Ni nanoparticles further enhanced the EWA capacity, owing to the combined dielectric and magnetic loss mechanism. The composite film achieved a minimum reflection loss of − 43.56 dB at 2.8 mm and an EAB of 4.2 GHz, effectively covering the X band. The enhanced EWA performance can be attributed to the synergistic effects of dielectric loss, magnetic loss, interfacial polarization, and the multilayer structure. This study demonstrates that a promising wideband EMW absorbing film was developed by exploiting the synergistic electromagnetic effects.

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全X宽带高性能电磁波吸波镍/液态金属/氧化石墨烯/细菌纤维素复合膜
研制厚度小、有效吸收带宽高的X波段(8.2-12.4 GHz)电磁波吸收材料对便携式电子器件和隐身材料的发展至关重要。本研究采用超声方法和静电自组装技术制备三维网状结构薄膜,积分点(液态金属,LM;镍颗粒(Ni)、线(细菌纤维素,BC)和表面(氧化石墨烯,GO)通过真空过滤和冷冻干燥。在Ni/LM/GO/BC复合薄膜中,BC和GO作为LM锚定和包装的“供体”,同时也为构建三维结构提供了基本的“骨架”或“网格”。这导致BC、GO和金属颗粒之间形成了许多非均相界面和导电网络。GO/BC (GB)薄膜电磁波吸收性能较差,不符合要求标准。然而,当单独添加LM时,性能得到改善,并且EAB扩展到整个X波段。磁性Ni纳米颗粒的引入进一步提高了EWA的容量,这是由于介电损耗和磁损耗相结合的机制。复合薄膜在2.8 mm处的最小反射损耗为- 43.56 dB, EAB为4.2 GHz,有效覆盖了X波段。介质损耗、磁损耗、界面极化和多层结构等因素的协同作用可提高EWA的性能。研究表明,利用协同电磁效应开发出了一种很有前途的宽带电磁波吸收膜。
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来源期刊
Journal of Materials Science: Materials in Electronics
Journal of Materials Science: Materials in Electronics 工程技术-材料科学:综合
CiteScore
5.00
自引率
7.10%
发文量
1931
审稿时长
2 months
期刊介绍: The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.
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