Self-supporting ultra-thin sandwich-structured ANFs-PVA/AgNWs films with flame-retardant and electromagnetic interference shielding performance

IF 6.5 2区材料科学 Q1 CHEMISTRY, APPLIED

Progress in Organic Coatings Pub Date : 2024-09-09 DOI:10.1016/j.porgcoat.2024.108801

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Abstract

Due to electronic product miniaturization and acceleration, electromagnetic radiation and thermal accumulation issues are prominent, posing risks to nearby devices and individuals. Developing thin polymer films to block electromagnetic radiation and prevent fires is crucial for smaller, faster electronics. In this study, we successfully fabricated a unique self-supporting ultra-thin sandwich-structured film named ANFs-PVA/AgNWs (APAg), which exhibited exceptional performance in both electromagnetic interference (EMI) shielding and flame retardancy. The introduction of inner AgNWs layer resulted in significant EMI shielding effectiveness (SE) at X-band frequencies, achieving an impressive 47.01 dB with a loading of only 0.10 mg/cm², effectively blocking 99.99 % of electromagnetic waves (EMWs). The ANFs-PVA layers were adopted as the flexible outer layer, endowing the films with excellent flame retardance and good mechanical support due to the high heat resistance of aramid nanofibers (ANFs) as well as the strong hydrogen bonding interaction between ANFs and PVA. The film demonstrated self-extinguishing behavior in vertical burning tests, achieving a flame-retardant rating of V-0. Furthermore, the sandwich structure provides high durability for the EMI shielding performance of the films under different conditions. This study presents a novel approach for fabricating high-performance polymer-based EMI shielding films that hold great potential for applications in electronics and communication technologies.

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具有阻燃和电磁干扰屏蔽性能的自支撑超薄夹层结构 ANFs-PVA/AgNWs 薄膜

由于电子产品的微型化和加速，电磁辐射和热积累问题十分突出，给附近的设备和个人带来风险。开发阻挡电磁辐射和防止起火的聚合物薄膜对于实现更小、更快的电子产品至关重要。在这项研究中，我们成功制备了一种独特的自支撑超薄夹层结构薄膜，命名为 ANFs-PVA/AgNWs (APAg)，它在电磁干扰（EMI）屏蔽和阻燃方面都表现出卓越的性能。内AgNWs层的引入使X波段频率的电磁干扰屏蔽效果（SE）显著提高，在负载仅为0.10 mg/cm2的情况下达到了惊人的47.01 dB，有效阻隔了99.99%的电磁波（EMWs）。采用芳纶纳米纤维-PVA 层作为柔性外层，由于芳纶纳米纤维（ANFs）的高耐热性以及 ANFs 和 PVA 之间的强氢键作用，薄膜具有优异的阻燃性和良好的机械支撑性。该薄膜在垂直燃烧测试中表现出自熄性，阻燃等级达到 V-0。此外，三明治结构还为薄膜在不同条件下的电磁干扰屏蔽性能提供了高耐久性。这项研究提出了一种制造高性能聚合物基 EMI 屏蔽膜的新方法，这种薄膜在电子和通信技术领域具有巨大的应用潜力。

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来源期刊

Progress in Organic Coatings 工程技术-材料科学：膜

CiteScore

11.40

自引率

15.20%

发文量

577

审稿时长

48 days

期刊介绍： The aim of this international journal is to analyse and publicise the progress and current state of knowledge in the field of organic coatings and related materials. The Editors and the Editorial Board members will solicit both review and research papers from academic and industrial scientists who are actively engaged in research and development or, in the case of review papers, have extensive experience in the subject to be reviewed. Unsolicited manuscripts will be accepted if they meet the journal''s requirements. The journal publishes papers dealing with such subjects as: • Chemical, physical and technological properties of organic coatings and related materials • Problems and methods of preparation, manufacture and application of these materials • Performance, testing and analysis.

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