Polyaniline-decorated carbon fibers for enhanced mechanical and electromagnetic interference shielding performances of epoxy composites

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Materials & Design Pub Date : 2022-05-01 DOI:10.1016/j.matdes.2022.110658

Weiwei Kong , Shuangqin Yi , Wenjin Sun , Ling Xu , Lichuan Jia , Dingxiang Yan , Zhongming Li

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引用次数: 21

Abstract

The development of carbon fiber-reinforced polymers (CFRPs) with high electromagnetic interference (EMI) shielding effectiveness is highly desirable for engineering applications. Nevertheless, poor interfacial adhesion between carbon fibers (CFs) and polymer matrix remains a serious issue. Herein, a mechanically enhanced CF/epoxy composite with highly efficient EMI shielding was fabricated through in-situ polymerization of polyaniline (PANI) nanolayer. The PANI nanolayer improved the interfacial adhesion in the composites via the entanglement of molecular chains, π–π stacking, and chemical bonding et al. The resulting CF/PANI/epoxy composite exhibited an interlaminar shear strength of 72.8 MPa, which was a 24% improvement over 58.5 MPa for the virgin CF/epoxy composite. Moreover, an excellent EMI shielding effectiveness of 54.8 dB was achieved, which was 58% higher than that of the virgin CF/epoxy composite. This could be attributed to the significant enhancement in conduction loss, interfacial polarization loss, and multiple reflections with the help of PANI nanolayer. This study provides a novel strategy for the development of high-performance CFRPs for efficient EMI shielding.

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聚苯胺修饰碳纤维用于增强环氧复合材料的机械和电磁干扰屏蔽性能

开发具有高电磁干扰屏蔽性能的碳纤维增强聚合物(CFRPs)是工程应用的迫切需要。然而，碳纤维与聚合物基体之间的界面粘附性差仍然是一个严重的问题。本文通过原位聚合聚苯胺(PANI)纳米层制备了具有高效电磁干扰屏蔽性能的机械增强CF/环氧复合材料。聚苯胺纳米层通过分子链纠缠、π -π堆叠和化学键等方式提高了复合材料的界面附着力。得到的CF/PANI/环氧复合材料的层间剪切强度为72.8 MPa，比原CF/环氧复合材料的58.5 MPa提高了24%。此外，该复合材料具有54.8 dB的优异电磁干扰屏蔽效果，比原始的CF/环氧复合材料提高了58%。这可能是由于聚苯胺纳米层显著增强了导电损耗、界面极化损耗和多次反射。该研究为开发高效屏蔽电磁干扰的高性能cfrp提供了一种新的策略。

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.