Flexible sandwich-structured silver nanowire/exfoliated graphite platelet/aramid nanofiber composite films with excellent EMI shielding, thermal conduction and Joule heating performances

IF 8.1 2区材料科学 Q1 ENGINEERING, MANUFACTURING Composites Part A: Applied Science and Manufacturing Pub Date : 2024-08-29 DOI:10.1016/j.compositesa.2024.108433

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Abstract

Multifunctional flexible sandwich-structured EMI shielding silver nanowire/exfoliated graphite platelet/aramid nanofiber (AgNW/EGP/ANF) composite films with excellent thermal conduction and Joule heating abilities were successfully prepared by a layer-by-layer vacuum filtration technique. The construction of EGP/ANF layer on the two sides is crucial in achieving outstanding thermal conductivity (TC) and contributes partial EMI shielding effectiveness (SE) for the composite films. The introduction of an ultrathin, dense, and sintered AgNW/ANF layer endows the composite films with significant enhancements in electrical conductivity and EMI SE. As a result, the optimal 30 μm-thick composite films with an AgNW loading of 35 wt% exhibit excellent EMI SE values of 69.0 dB in the X-band and 78.4 dB in the Ka-band and a superior in-plane TC of 48.7 W m⁻¹ K⁻¹. Besides, the prepared composite films present an outstanding Joule heating performance. Briefly, the sandwich-structured composite films show huge potential in advanced portable and wearable electronic applications.

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具有优异电磁干扰屏蔽、热传导和焦耳热性能的柔性夹层结构银纳米线/片状石墨/芳纶纳米纤维复合薄膜

通过逐层真空过滤技术成功制备了具有优异热传导和焦耳热能力的多功能柔性夹层结构 EMI 屏蔽银纳米线/片状石墨/芳纶纳米纤维（AgNW/EGP/ANF）复合薄膜。双面 EGP/ANF 层的构建对于实现出色的热导率（TC）至关重要，同时也有助于提高复合薄膜的部分电磁干扰屏蔽效果（SE）。引入超薄、致密和烧结的 AgNW/ANF 层可显著提高复合薄膜的导电性和 EMI SE。因此，AgNW 含量为 35 wt%、厚度为 30 μm 的最佳复合薄膜在 X 波段和 Ka 波段分别表现出 69.0 dB 和 78.4 dB 的优异 EMI SE 值，以及 48.7 W m-1 K-1 的出色面内 TC 值。此外，制备的复合薄膜还具有出色的焦耳加热性能。简而言之，三明治结构复合薄膜在先进的便携式和可穿戴电子应用中展现出巨大的潜力。

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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.