Low thickness electromagnetic wave absorbing polyurethane and IIR composites by interfacial polarization of multi-layer structure

IF 1.7 4区工程技术 Q4 POLYMER SCIENCE

Journal of Polymer Engineering Pub Date : 2024-09-05 DOI:10.1515/polyeng-2024-0095

Jinghui Yang

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引用次数: 0

Abstract

Electromagnetic cooperative strategy has been proved to be an effective approach that can significantly decrease the matching thickness required for reflection loss. However, improving the electromagnetic wave (EMW) absorbing effectiveness with low matching thickness remains challenging for current single-phase absorbing materials. A layer-by-layer construction design is used in our study via a combination with iso-butyl isoprene rubber (IIR) and mixed polyurethane (MPU) as the matrix, with the single-wall carbon nanotubes (SWCNTs) and magnetic powder as fillers. This bilayer composite design resulted in a decrease in matching thickness and a shift in absorption bandwidth to higher frequencies by 40 %–50 %. Furthermore, the trilayer structure of MPU/IIR/MPU was found to stabilize permeability, enhance the thermal stability of the magnetism and improve the shielding effectiveness significantly. The thickness corresponding minimum absorption loss of the trilayer composites decreased and the absorption bandwidth of −10 dB widened by 50 % from 8.2 GHz–9.5 GHz to 10.2 GHz–12.4 GHz.

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通过多层结构的界面极化实现低厚度电磁波吸收聚氨酯和 IIR 复合材料

电磁协同策略已被证明是一种有效的方法，可显著降低反射损耗所需的匹配厚度。然而，对于目前的单相吸波材料来说，要在低匹配厚度的情况下提高电磁波（EMW）吸收效果仍然是一项挑战。我们的研究采用了逐层结构设计，以异丁基异戊二烯橡胶（IIR）和混合聚氨酯（MPU）为基体，单壁碳纳米管（SWCNT）和磁粉为填料。这种双层复合设计降低了匹配厚度，并将吸收带宽向更高频率转移了 40%-50%。此外，MPU/IIR/MPU 的三层结构还能稳定磁导率，增强磁性的热稳定性，并显著提高屏蔽效果。三层复合材料相应的最小吸收损耗厚度减小，-10 dB 的吸收带宽从 8.2 GHz-9.5 GHz 到 10.2 GHz-12.4 GHz 增加了 50%。

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

Journal of Polymer Engineering 工程技术-高分子科学

CiteScore

3.20

自引率

5.00%

发文量

审稿时长

2.5 months

期刊介绍： Journal of Polymer Engineering publishes reviews, original basic and applied research contributions as well as recent technological developments in polymer engineering. Polymer engineering is a strongly interdisciplinary field and papers published by the journal may span areas such as polymer physics, polymer processing and engineering of polymer-based materials and their applications. The editors and the publisher are committed to high quality standards and rapid handling of the peer review and publication processes.