A hollow hybrid separated structure based on Ni/Pani-Fe3O4 constructed for an ultra-efficient electromagnetic interference shielding and hydrophobic PPTA fabric

被引：0

作者：

Zhong, Yun ^{[1
]}

Guo, Yiliang ^{[2
]}

Li, Mengyao ^{[1
]}

Wei, Xinpeng ^{[1
]}

Wang, Jian ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Xihua University, Chengdu,610039, China

[2] School of Electrical Engineering and Electronic Information, Xihua University, Chengdu,610039, China

来源：

Journal of Alloys and Compounds | 2022年 / 925卷

关键词：

Contact angle - Corrosion resistance - Electric conductivity - Electromagnetic shielding - Electromagnetic wave interference - Hydrophobicity - Magnetite - Nickel - Polyaniline - Separation - Signal interference;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

How to effectively use the structural design on poly para-phenylene terephthalamide (PPTA) fabric to provide superior electromagnetic interference (EMI) shielding performance while giving it hydrophobicity and comprehensive functions remains a significant issue. Herein, a layered assembly technique is demonstrated to construct a hollow hybrid separated structure with gradient electrical conductivity on PPTA fabric for achieving efficient electromagnetic radiation attenuation and excellent hydrophobic properties. Due to the difference in electrical conductivity between Ni and polyaniline (Pani), gradient conductivity is generated from top to bottom that highly conductive core-shell Ni provides excellent electromagnetic reflection capability, and Pani-Fe3O4 forms a separated electromagnetic absorption network to achieve an absorption-reflection-reabsorption shielding mode. The EMI shielding effectiveness (SE) of the composite fabric is more than 65 dB, and the normalized specific SE (SSE) is as high as 2153 dB·cm2/g at a thickness of 0.221 mm, more than 20% of electromagnetic waves are absorbed, which can effectively alleviate the secondary contamination caused by reflection. The constructed hydrophobic structure enables the fabric to reach a large contact angle (CA) of 156.4° with excellent self-cleaning and antifouling properties. More, integrated functionalities are discovered in the composite fabric including flexibility, thermal stability and corrosion resistance, offering great potential for EMI shielding in complex environments. © 2022 Elsevier B.V.

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