Constructing Interface Charge Traps to Improve Dielectric Properties of Aramid Fiber Reinforced Epoxy Composite by Graphene Oxide

IF 5.7 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Surfaces and Interfaces Pub Date : 2025-06-04 DOI:10.1016/j.surfin.2025.106854

Xiaoxiao Kong , Chengyao Hou , Yijun Du , Yun Chen , Ge Zhang , Yunqi Xing , Boxue Du

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引用次数: 0

Abstract

In this paper, mussel-inspired polydopamine (PDA) coating assisted with plasma treatment is employed to modify aramid fiber surface, and then graphene oxide (GO) is successfully deposited to construct multiscale interface and introduce charge traps, aiming at enhancing dielectric properties of aramid fiber reinforced polymer (AFRP) composites. The results show that the incorporation of GO fillers significantly improves the charge trapping capability due to their large specific surface area and nano-effect. Consequently, the dielectric properties of AFRPs are enhanced, with DC conductivity decreasing by 81.31%, partial discharge inception voltage and breakdown strength increasing by 15.18% and 30.60%, respectively. Meanwhile, the interfacial shear strength and interlaminar shear strength increase by 136.43% and 55.71%, respectively, due to the enhancement of roughness and mechanical interlocking between the fibers and epoxy resin. Furthermore, the construction of interface charge traps maintains effectiveness even after mechanical impact, showing great potential for applications in HV power equipment subjected to both HV and dynamic mechanical loads.

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用氧化石墨烯构建界面电荷阱改善芳纶纤维增强环氧复合材料的介电性能

本文采用贻贝启发聚多巴胺（PDA）涂层辅助等离子体处理对芳纶纤维表面进行修饰，然后成功沉积氧化石墨烯（GO），构建多尺度界面并引入电荷陷阱，旨在提高芳纶纤维增强聚合物（AFRP）复合材料的介电性能。结果表明，氧化石墨烯填料由于具有较大的比表面积和纳米效应，显著提高了电荷捕获能力。结果表明，AFRPs的介电性能得到增强，直流电导率降低81.31%，局部放电起始电压和击穿强度分别提高15.18%和30.60%。同时，由于纤维与环氧树脂之间的粗糙度和机械联锁增强，界面抗剪强度和层间抗剪强度分别提高了136.43%和55.71%。此外，界面电荷陷阱的构建即使在机械冲击后仍保持有效性，在高压和动态机械载荷下的高压电力设备中显示出巨大的应用潜力。

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来源期刊

Surfaces and Interfaces Chemistry-General Chemistry

CiteScore

8.50

自引率

6.50%

发文量

753

审稿时长

35 days

期刊介绍： The aim of the journal is to provide a respectful outlet for ''sound science'' papers in all research areas on surfaces and interfaces. We define sound science papers as papers that describe new and well-executed research, but that do not necessarily provide brand new insights or are merely a description of research results. Surfaces and Interfaces publishes research papers in all fields of surface science which may not always find the right home on first submission to our Elsevier sister journals (Applied Surface, Surface and Coatings Technology, Thin Solid Films)