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A facile method to improving the electromagnetic interference shielding of a free-standing and foldable carbon nanotube mat

机译:一种改进独立式和可折叠碳纳米管垫的电磁干扰屏蔽的容易方法

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The electromagnetic interference (EMI) shielding effectiveness (SE) of carbon nanotube (CNT) mats is usually limited by the low solubility of ferrocene in the reaction solution. In this study, an approach was used to prepare a CNT based composite mat with high mass percentages of iron nanoparticles, by pumping ferrocene/methanol solution into a reactor using a secondary quartz capillary at high temperatures. Consequently, free-standing and foldable mats with high saturation magnetization of 57.3 emu g ~(?1) and low sheet and volume electrical resistance of 10.8 Ω sq. ~(?1) and 2.0 × 10 ~(?3) Ω cm were obtained. Thus, a high EMI SE of 40.4–60.3 dB can be achieved over frequency ranges of 1 GHz to 18 GHz with a low mat thickness of 1.0 μm. Due to its high flexibility and remarkable EMI SE properties, the free-standing and foldable CNT mat has potential applications in the shielding field.
机译:碳纳米管(CNT)垫的电磁干扰(EMI)屏蔽效能(SE)通常受铁茂酯在反应溶液中的低溶解度的限制。在该研究中,通过在高温下将二茂铁/甲醇溶液泵送到反应器中,使用高质量的毛细管在高温下泵入反应器中,使用具有高质量百分比的铁纳米颗粒的方法来制备CNT基复合垫。因此,具有高饱和磁化的独立和可折叠垫57.3 emu g〜(α1)和低板和体积电阻为10.8Ωsq。〜(?1)和2.0×10〜(?3)Ωcm是获得。因此,可以在1GHz至18GHz的频率范围内实现40.4-60.3dB的高EMI SE,低垫厚度为1.0μm。由于其具有高柔韧性和显着的EMI SE特性,可拆卸和可折叠的CNT垫在屏蔽领域具有潜在的应用。

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