调节石墨烯/尼复合膜的导电网络,以实现可调节的电磁屏蔽效率
Hu Ge1, Daming Gao1, Shudong Zhang2,3
1School of Energy Materials & Chemical Engineering, Hefei University, Hefei, Anhui 230601, China.
ACS applied materials & interfaces
|November 25, 2024
概括
研究人员开发了一种新的可伸缩材料,用于可调节的电磁干扰 (EMI) 屏蔽. 这种智能材料在中使用化激光诱导石墨烯 (LIG/Ni),为可穿戴电子产品和电磁保护提供可调节的屏蔽效率.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 电气工程 电气工程
背景情况:
- 可调节的电磁干扰 (EMI) 屏蔽材料对于可穿戴和可切换应用至关重要.
- 目前的材料在性范围和稳定性方面面临限制.
研究的目的:
- 制造一个高度可拉伸的导电框架,具有可调节的EMI屏蔽效率.
- 为了研究材料结构,电导率和EMI屏蔽性能在应变下之间的关系.
主要方法:
- 与相结合的Ni-doped激光诱导石墨烯 (LIG/Ni) 形成一个导电复合材料.
- 对LIG扫描轨迹和Ni纳米粒子沉积的控制操纵,以形成有序的导电路径.
- 在X频段的电导率和EMI屏蔽效率 (SE) 在不同应变水平下 (高达200%) 的评估.
主要成果:
- 实现了一个有序和密集的导电网络,使可调节的电导率成为可能.
- 在200%的应变下,导电率降至1.07S/cm,平均SE降至2.33dB.
- 在应变释放后,导电率恢复到63.6S/m,增强的SE为68.12dB.
结论:
- 开发的LIG/Ni-复合材料具有高度可逆的导电网络和卓越的循环稳定性.
- 该材料提供了广泛的可调节的SE,证明了电磁保护的重要实用价值.
- 这项工作为多功能,智能EMI屏蔽应用提供了有前途的方法.
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