Design and construction of interface engineering in short carbon fiber composites for excellent mechanical properties and efficient electromagnetic interference shielding

IF 6.3 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Applied Surface Science Pub Date : 2024-12-13 DOI:10.1016/j.apsusc.2024.162098

Jie Hu, Xueqing Xiong, Yong Chen, Haizhu Long

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引用次数: 0

Abstract

The weak mechanical property and low electromagnetic interference (EMI) shielding effectiveness of short carbon fiber reinforced composites (SCFRCs) hinder their application in the aerospace field. To overcome these drawbacks, magnetic Co@CNT is decorated on the short carbon fiber (SCF) surface by In-situ growth method to enhance the interfacial characterizations of SCFRCs. The results demonstrate that the application of Co@CNT results in a dramatic increase of tensile strength, flexural strength and modulus by 250 %, 160 % and 190 %, respectively, compared to the pure SCF-epoxy (EP) composite. The primary reason can be attributed to the formation of a Co@CNT interfacial region between the short-cut carbon fiber (SCF) filler and the epoxy (EP) matrix in the composites. This interfacial region facilitates efficient stress transfer from the matrix to the surface-modified SCF filler, leading to enhanced mechanical properties of the SCF-EP composites. In addition, Co@CNT-modified SCFRCs obtained EMI shielding effectiveness as high as 59 dB in X-band, which is about 2.3 times that of pristine SCF-EP composite. The excellent EMI shielding effectiveness is ascribed to enhanced dielectric loss and magnetic loss caused by magnetic Co@CNT. Thus, the synergistic effect of magnetic Co and highly conductive CNT resulted in the improvement of mechanical properties and electromagnetic shielding properties. This work offers insights into the preparation of structural–functional integrated SCFRCs.

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短碳纤维增强复合材料（SCFRC）的机械性能较弱，电磁干扰（EMI）屏蔽效果较低，这阻碍了其在航空航天领域的应用。为了克服这些缺点，采用原位生长法在短碳纤维（SCF）表面装饰磁性 Co@CNT，以增强 SCFRC 的界面特性。结果表明，与纯 SCF-环氧（EP）复合材料相比，Co@CNT 的应用使拉伸强度、弯曲强度和模量分别大幅提高了 250%、160% 和 190%。主要原因是复合材料中的短切碳纤维（SCF）填料和环氧树脂（EP）基体之间形成了 Co@CNT 界面区域。该界面区有助于从基体向表面改性的 SCF 填料有效传递应力，从而提高 SCF-EP 复合材料的机械性能。此外，Co@CNT 改性 SCFRC 在 X 波段的 EMI 屏蔽效果高达 59 dB，约为原始 SCF-EP 复合材料的 2.3 倍。优异的 EMI 屏蔽效果归因于磁性 Co@CNT 增强了介电损耗和磁损耗。因此，磁性 Co 和高导电性 CNT 的协同作用改善了材料的机械性能和电磁屏蔽性能。这项工作为制备结构功能集成 SCFRC 提供了启示。

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

Applied Surface Science 工程技术-材料科学：膜

CiteScore

12.50

自引率

7.50%

发文量

3393

审稿时长

67 days

期刊介绍： Applied Surface Science covers topics contributing to a better understanding of surfaces, interfaces, nanostructures and their applications. The journal is concerned with scientific research on the atomic and molecular level of material properties determined with specific surface analytical techniques and/or computational methods, as well as the processing of such structures.

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