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A large-area AgNW-modified textile with high-performance electromagnetic interference shielding
npj Flexible Electronics ( IF 12.3 ) Pub Date : 2020-06-01 , DOI: 10.1038/s41528-020-0074-0
Junchen Liu , Sen Lin , Kai Huang , Chao Jia , Qingmin Wang , Ziwei Li , Jianan Song , Zhenglian Liu , Haiyang Wang , Ming Lei , Hui Wu

Manufacturing a flexible, light, large-area, and high-efficiency electromagnetic shielding materials in a straightforward and cost-effective manner presently remains a significant challenge. In this work, we propose a conductive network design and verify its electromagnetic interference (EMI) shielding effectiveness (SE) by simulation. Using the structure and parameters obtained by simulation, we prepare a flexible EMI shielding material using silver nanowires (AgNWs)/polyvinyl butyral (PVB) ethanol solution and textile substructure via a facile immersing method. In the frequency range of 5–18 GHz, the AgNWs/PVB textile with 1.4 mm thickness achieves an EMI SE of 59 dB, which exceeds the requirements for commercial applications. Due to the low density of 56 mg/cm3, specific shielding effectiveness (SSE) of this material reaches 1053 dB m3/g. It is found that the AgNWs/PVB textile is more resistant to washing with water and oxidation than AgNWs textile without a PVB protector. As a result, the conductivity of AgNWs/PVB textile exhibits no change after washing with water and varies slightly after being kept in hot air. We find that a signal monitor is unable to detect a signal emitted by a mobile phone from a jacket lined with AgNWs/PVB textile. AgNWs/PVB textile with these properties can be mass-produced as high-efficiency EMI shielding material for commercial applications.



中文翻译:

具有高性能电磁干扰屏蔽的大面积AgNW改性纺织品

当前,以直接且成本有效的方式制造柔性,轻便,大面积且高效的电磁屏蔽材料仍然是一项重大挑战。在这项工作中,我们提出了一种导电网络设计,并通过仿真验证了其电磁干扰(EMI)屏蔽效果(SE)。使用通过仿真获得的结构和参数,我们使用银纳米线(AgNWs)/聚乙烯醇缩丁醛(PVB)乙醇溶液和纺织品子结构通过一种容易的浸没方法制备了一种柔性EMI屏蔽材料。在5–18 GHz的频率范围内,厚度为1.4 mm的AgNWs / PVB纺织品的EMI SE为59 dB,超过了商业应用的要求。由于密度低至56 mg / cm 3,该材料的比屏蔽效率(SSE)达到1053 dB m 3 / g。发现AgNWs / PVB纺织品比没有PVB保护剂的AgNWs纺织品更耐水洗和抗氧化。结果,AgNWs / PVB织物的电导率在用水洗涤后没有变化,而在热空气中保持不变。我们发现,信号监视器无法检测到手机发出的信号,该信号来自衬有AgNWs / PVB织物的夹克。具有这些特性的AgNWs / PVB纺织品可以大量生产,作为用于商业应用的高效EMI屏蔽材料。

更新日期:2020-06-01
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