Lightweight and flexible polysulfonamide/polyurethane-CNTs@Ag fiber paper for electromagnetic interference shielding

IF 8.6 2区工程技术 Q1 ENERGY & FUELS

Sustainable Materials and Technologies Pub Date : 2024-08-12 DOI:10.1016/j.susmat.2024.e01088

Junyi Wang , Shuo Zhang , Runzheng Liu , Yin Zhang , Xiaowei Huang , Xin Ning , Guanxian Dou , Jinfa Ming

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引用次数: 0

Abstract

Nowadays, electromagnetic wave radiation is one of the sources of environmental pollution, which seriously affects human health and and the environment. Fiber paper made from high-performance fibers has shown potential for use in the electromagnetic interference (EMI) shielding due to adapting different complex working environments. However, achieving lightweight, high-efficiency, and flexible electromagnetic shielding remains challenging. To address this issue, we design a lightweight polysulfonamide/polyurethane-CNTs@Ag (PSA/PU-CNTs@Ag) fiber paper with double-layered structure and high electromagnetic shielding efficiency (EMI SE) via vacuum-assisted filtration and heat treatment. The results show the content of Ag nanoparticles 0.3 g in PSA/PU-CNTs@Ag fiber paper, the resistance is less than 1 Ω, the electrical conductivity reaches 883.57 S/m. At the same time, the thickness of Ag film increases, the EMI SE value reaches 90.537 dB. The EMI SE value of PSA/PU-CNTs@Ag fiber paper after folding one thousand times has decreased, but still maintains 95% of the original shielding performance. Moreover, its EMI SE values still maintain above 60 dB in various extreme environments (hot 150 °C, cold −70 °C). In summary, this work shows PSA based EMI shielding materials own excellent overall performance and hold broad different working extreme environments.

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用于电磁干扰屏蔽的轻质柔性聚磺酰胺/聚氨酯-CNTs@银纤维纸

如今，电磁波辐射是环境污染的来源之一，严重影响人类健康和环境。由高性能纤维制成的纤维纸由于能适应不同的复杂工作环境，在电磁干扰（EMI）屏蔽方面显示出巨大的应用潜力。然而，实现轻质、高效和灵活的电磁屏蔽仍然具有挑战性。针对这一问题，我们通过真空辅助过滤和热处理，设计出一种具有双层结构和高电磁屏蔽效率（EMI SE）的轻质聚磺酰胺/聚氨酯-CNTs@Ag（PSA/PU-CNTs@Ag）纤维纸。结果表明，PSA/PU-CNTs@Ag 纤维纸中的 Ag 纳米粒子含量为 0.3 g 时，电阻小于 1 Ω，导电率达到 883.57 S/m。同时，随着银膜厚度的增加，EMI SE 值达到 90.537 dB。经过一千次折叠后，PSA/PU-CNTs@Ag 纤维纸的 EMI SE 值有所下降，但仍保持了原有屏蔽性能的 95%。此外，其 EMI SE 值在各种极端环境（热 150 °C、冷 -70 °C）下仍能保持在 60 dB 以上。总之，这项工作表明基于 PSA 的 EMI 屏蔽材料具有优异的综合性能，并能在不同的极端工作环境中保持稳定。

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

Sustainable Materials and Technologies Energy-Renewable Energy, Sustainability and the Environment

CiteScore

13.40

自引率

4.20%

发文量

158

审稿时长

45 days

期刊介绍： Sustainable Materials and Technologies (SM&T), an international, cross-disciplinary, fully open access journal published by Elsevier, focuses on original full-length research articles and reviews. It covers applied or fundamental science of nano-, micro-, meso-, and macro-scale aspects of materials and technologies for sustainable development. SM&T gives special attention to contributions that bridge the knowledge gap between materials and system designs.