Study on the preparation of an epoxy-based electromagnetic wave-absorbing adhesive film and its hygrothermal aging

IF 2.3 3区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES Journal of Reinforced Plastics and Composites Pub Date : 2024-04-18 DOI:10.1177/07316844241248510

Kaifei Ding, Wei Li, Yuxuan Wang, Yuxuan Yang, Mingwei Zhu, Lu Zhang, Hongmei Li, Shaowei Lu

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Abstract

With the wide application of structural adhesives in the aerospace field, the structural adhesive films with only bonding property have not met the current needs. The structural-functional integrated adhesive films have become the current study hotspot. In this paper, an epoxy-based electromagnetic wave-absorbing adhesive film was prepared by adding the magnetite/SWCNTs as the absorbing agent to the epoxy adhesive. And then, it was subjected to hygrothermal aging for 1500h at 70°C and 90% RH. The results show that the absorbing filler was uniformly dispersed in the epoxy resin matrix. The reflection loss (RL) peak of the magnetite/SWCNTs/epoxy adhesive film reached −27.5 dB at the frequency of 8.75 GHz when the absorbing agent content was 20 wt%. The effective bandwidth was 3 GHz with 25 wt% absorbent content. Moreover, after 1000h of hygrothermal aging, the lap shear strength of the magnetite/SWCNTs/epoxy adhesive film decreased by 19.6%, indicating that it can perform excellent service under hygrothermal conditions.

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环氧基电磁波吸收胶膜的制备及其湿热老化研究

随着结构胶粘剂在航空航天领域的广泛应用，仅具有粘接性能的结构胶粘薄膜已不能满足当前的需求。结构功能一体化胶膜成为当前的研究热点。本文在环氧树脂胶粘剂中加入磁铁矿/SWCNTs 作为吸波剂，制备了一种环氧树脂基电磁波吸波胶膜。然后，在 70°C 和 90% 相对湿度条件下对其进行 1500 小时的湿热老化。结果表明，吸波填料均匀地分散在环氧树脂基体中。当吸收剂含量为 20 wt% 时，磁铁矿/SWCNTs/环氧树脂胶膜的反射损耗（RL）峰值在 8.75 GHz 频率下达到 -27.5 dB。吸收剂含量为 25 wt% 时，有效带宽为 3 GHz。此外，在经过 1000 小时的湿热老化后，磁铁矿/SWCNTs/环氧树脂粘合剂薄膜的搭接剪切强度降低了 19.6%，这表明它能在湿热条件下发挥出色的作用。

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来源期刊

Journal of Reinforced Plastics and Composites 工程技术-材料科学：复合

CiteScore

5.40

自引率

6.50%

发文量

审稿时长

1.3 months

期刊介绍： The Journal of Reinforced Plastics and Composites is a fully peer-reviewed international journal that publishes original research and review articles on a broad range of today''s reinforced plastics and composites including areas in: Constituent materials: matrix materials, reinforcements and coatings. Properties and performance: The results of testing, predictive models, and in-service evaluation of a wide range of materials are published, providing the reader with extensive properties data for reference. Analysis and design: Frequency reports on these subjects inform the reader of analytical techniques, design processes and the many design options available in materials composition. Processing and fabrication: There is increased interest among materials engineers in cost-effective processing. Applications: Reports on new materials R&D are often related to the service requirements of specific application areas, such as automotive, marine, construction and aviation. Reports on special topics are regularly included such as recycling, environmental effects, novel materials, computer-aided design, predictive modelling, and "smart" composite materials. "The articles in the Journal of Reinforced Plastics and Products are must reading for engineers in industry and for researchers working on leading edge problems" Professor Emeritus Stephen W Tsai National Sun Yat-sen University, Taiwan This journal is a member of the Committee on Publication Ethics (COPE).