Electromagnetic Interference Shielding Effectiveness of Electroless Nickel Plating and Anodization on Modified Carbon Nanotubes/Epoxy Composites

In this work, the influence of electroless nickel-plated and anodized carbon nanotubes (CNT) on the electromagnetic interference shielding effectiveness (EMI-SE) properties of CNT/epoxy composites was studied. The surface properties of modified CNT were measured by field emission scanning electron microscopy and X-ray photoelectron spectroscopy. The composites were prepared by adding 7 wt% modified CNT to epoxy. The EMI-SE of the composites was evaluated through reflection and absorption loss in the frequency range of 30 MHz-1.5 GHz. The electric conductivity was measured using a 4-pointprobe electric resistivity tester. The results show that, the EMI-SE of the composites with 3min nickel-plated CNT was the highest. The reflection loss of anodized CNT was found to be sharply increased in the frequency range of 1.25-1.35 GHz. In addition, the reflection loss of modified CNT was improved, but the absorption loss was decreased, respectively. This was probably because electroless nickel-plating and anodization led to the improvement in the polarity of the CNT surface which increased the EMI-SE of the composites.

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Electromagnetic Interference Shielding Effectiveness of Electroless Nickel Plating and Anodization on Modified Carbon Nanotubes/Epoxy Composites

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