The present research focuses on the preparation of an efficient material that acts as a deterrent to electromagnetic pollution. In this study, graphite and carbon fiber (CF) reinforced polypropylene (PP) composites (GCF) are prepared using a melt processing technique via a twin‐screw extruder. The prepared composites were evaluated for mechanical, thermal, DC conductivity, and EMI shielding properties. There is a rise in the tensile strength (4.32%) and thermal stability (6.57%) of composites were recorded as compared to pure PP. The fractured morphology of the composites showed the breakdown of CF, leading to the improvement in the tensile strength of the composites. An increase in electrical conductivity was seen at maximum (GCF4) filler loading indicating 2.31 × 10−4 S/cm which is much better than the pure PP value (2.07 × 10−10 S/cm). The maximum value of shielding effectiveness is achieved at the maximum weight percentage of filler loading which is −44.43 dB with a thickness of 2 mm covering the X‐band (8.2–12.4 GHz).

The present study tells about dc conductivity, mechanical, and electromagnetic interference (EMI) shielding response of multiwall carbon nanotubes (MWCNT) reinforced polypropylene nanocomposites prepared via melt processing technique using a twin-screw extruder. The tensile strength of the nanocomposites shows improvement by 27% compared to the sample with no filler added (PCN0). The incorporation of MWCNT leads to a boost in electrical conductivity from 2.07 × 10 −10 to 4.21 × 10 −6 S/cm. The maximum EMI shielding effectiveness obtained at 5 wt% of MWCNT load valued −21.07 in the X-band (8.2-12.4 GHz) frequency range, measured using the vector network analyzer. The results concluded that the prepared nanocomposite is suitable to be used as a mechanically durable shielding material to fulfill the industrial needs of shielding.

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In this study, we investigated the mechanical, DC conductivity, and electromagnetic interference (EMI) shielding properties of multiwalled carbon nanotubes (MWCNTs) and carbon fiber reinforced polypropylene (CNC) nanocomposites. The nanocomposites were prepared by melt processing technique using a twin‐screw extruder followed by injection molding. This combination of CF and MWCNT improved the tensile strength and modulus of the nanocomposites by up to 31.14% and 60.14%. The percolation behavior helped to improve the DC electrical conductivity from 2.07 × 10−10 to 9.58 × 10−2 s/cm. The CNC nanocomposites exhibited shielding effectiveness of 51.9 dB at maximum filler loading in the X‐band (8.2–12.4 GHz) for a 2 mm thick sample. In addition, efforts have been made to develop a compatible EMI shielding material using multiple fillers.