Electromagnetic interference shielding effectiveness of high-density polyethylene composites reinforced with multi-walled carbon nanotubes

The effect of multi-walled carbon nanotubes (MWCNTs) (1-18 wt.%) on the electromagnetic interference shielding effectiveness (EMI-SE) of high-density polyethylene (HDPE) composites was investigated. The volume resistivity of the composites was tested using a four-point probe electrical resistivity tester. The EMI-SE of the composites was defined as the attenuation of the propagating electromagnetic waves produced. Our results indicated that the EMI-SE was enhanced with increase in the MWCNT content, which played a key factor in determining the EMI-SE. The highest EMI-SE of the composites was approximately 58. dB for 18 wt.% MWCNT/HDPE at 1.4 GHz.