Facile One-Pot Hydrothermal Synthesis of Copper Nanowires and Their Impact on the EMI Shielding Capability of Epoxy Composites,Chemical Engineering & Technology

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Facile One-Pot Hydrothermal Synthesis of Copper Nanowires and Their Impact on the EMI Shielding Capability of Epoxy Composites
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2021-11-26 , DOI: 10.1002/ceat.202100389
Bheema Rajesh Kumar ₁ , Krishna C. Etika ₁

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In this work epoxy nanocomposites containing varying content of copper nanowires (CuNW) were produced. The CuNW were synthesized using a facile one-pot hydrothermal synthesis method. The composites were characterized for their electrical conductivity and electromagnetic interference (EMI) shielding effectiveness in the X-band. The electrical conductivity of the epoxy composites was measured, and the composites containing 12 wt % CuNW demonstrated percolated behavior and exhibited a frequency-independent conductivity value of 1.76 × 10⁻⁶ S m⁻¹ in the range of 25–200 Hz. The 12 wt % CuNW sample demonstrated an EMI shielding effectiveness value of 6.5 dB, which corresponds to 77.1 % attenuation of the incident electromagnetic wave. Furthermore, an absorption-dominated shielding mechanism was observed in these composites.

中文翻译：

铜纳米线的简便一锅水热合成及其对环氧复合材料 EMI 屏蔽能力的影响

在这项工作中，生产了含有不同含量铜纳米线 (CuNW) 的环氧树脂纳米复合材料。使用简便的一锅水热合成方法合成CuNW。复合材料的特征在于其在 X 波段的导电性和电磁干扰 (EMI) 屏蔽效果。测量了环氧树脂复合材料的电导率，含有 12 wt % CuNW 的复合材料表现出渗透行为，并表现出与频率无关的电导率值为 1.76 × 10 ^-6 S m ^-1在 25-200 赫兹的范围内。12 wt% CuNW 样品的 EMI 屏蔽效能值为 6.5 dB，对应于入射电磁波衰减 77.1%。此外，在这些复合材料中观察到以吸收为主的屏蔽机制。

更新日期：2021-11-26

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