Experimental study demonstrates enhanced microwave absorption in PVC thin films loaded with 10 wt% carbon nanotubes, suggesting potential applications in electromagnetic interference shielding.
Poly(vinyl chloride) (PVC) and multi-walled carbon nanotubes (MWCNTs) were hot-pressed into ∼0.25 mm thick (PVC)100–x/(MWCNTs)x thin-film composites (TFCs), where x = 0.2–10 wt%. MWCNTs were examined by SEM-EDX, TGA, and TPD MS. The MWCNTs exhibited thermal stability, with a mass loss of ∼3.5% up to 800 °C in an argon atmosphere. The PVC bands in the FTIR spectra shifted after MWCNT incorporation, indicating weak interfacial interactions between PVC and MWCNTs. Ka-band microwave measurements revealed that the TFCs remain radio-transparent at ≤5 wt%, whereas composites containing 10 wt% MWCNTs exhibit enhanced electromagnetic attenuation, with microwave absorption reaching ∼41% at ∼30 GHz.
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Grishchenko et al. (2026) studied this question.
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