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高性能,抗应变稳定的电磁屏蔽材料由磁性弹性纤维网络启用,固定液体金属

Qi Zhang^1,2, Yuanzhao Wu¹, Xilai Bao¹

¹Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|July 18, 2025

概括

研究人员开发了一种超薄的可拉伸膜,用于电磁干扰 (EMI) 屏蔽. 这种材料为可穿戴电子产品提供高屏蔽效率和稳定性,即使在应力下.

科学领域:

材料科学材料科学材料科学
电气工程电气工程
纳米技术纳米技术

背景情况:

可穿戴电子设备在各种电磁环境中需要可靠的电磁干扰 (EMI) 屏蔽.
同时实现超薄,高屏蔽效率 (SE) 和动态稳定性是可拉伸EMI屏蔽材料的重大挑战.

研究的目的:

开发一种超薄,弹性EMI屏蔽膜,具有高屏蔽效率和出色的动态稳定性.
为了利用磁电协同效应和固定互锁机制来提高性能.

主要方法:

使用铁磁弹性纳米纤维网络和嵌入液体金属 (LM) 制造超薄弹性EMI屏蔽膜 (TPU/Fe-LM).
在广泛的频率范围 (0.1MHz至40GHz) 中,EMI屏蔽性能的表征.
在拉伸应变下对材料稳定性的评估 (高达100%).

主要成果:

85微米厚的薄膜实现了平均EMI SE超过70dB.
屏蔽性能在100%的拉力应变下显示只有2.59%的变化.
证明了每单位厚度的高EMI SE (SSE = 1225 dB mm−1 @ 100%的应变).

结论:

开发的TPU/Fe-LM薄膜提供了卓越的EMI屏蔽和应变稳定性,性能优于现有的可拉伸材料.
该材料显示出在可穿戴电子产品中增强电磁保护的巨大潜力.
将其集成到可拉伸电容应变传感器中,证明了机器人运动监控的角度分辨率提高了50倍.

关键词:

电磁干扰屏蔽电磁干扰屏蔽铁磁纳米纤维网络铁磁纳米纤维网络液体金属是一种液体金属.磁电协同效应的影响固定 - 相互锁定机制.

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