Conductive polymer nanocomposite incorporated with carbon nanotubes for effective electromagnetic interference shielding: A numerical study

Abstract

This study presents a comprehensive numerical investigation of the electromagnetic interference (EMI) shielding capabilities of a conductive polymer nanocomposite incorporated with carbon nanotubes (CPNC) in the X‐band. The investigation is conducted using a commercial finite element simulation package, Ansys HFSS. The study focuses on analyzing the EMI shielding effectiveness (SE) of CPNC by varying the weight percent (wt%) of carbon nanotubes (CNTs), thickness, and shape of the shielding material. Our outcomes show that the EMI SE of CPNC increases with the wt% of CNTs. Notably, a maximum EMI SE is observed around ~90 dB due to absorption (SEA) at a 4 mm pallet‐shaped CPNC and ~180 dB for a hollow cylindrical CPNC (22.86 mm outer diameter and 3 mm thickness) with 2 wt% of CNT. The EMI SE due to absorption (SEA) at a pallet thickness of 4 mm exhibits a significant improvement of ~107% compared to the SEA observed at a thickness of 1 mm. These findings highlight the exceptional absorption capabilities and lightweight nature of CPNC, rendering it a promising shielding material for aerospace and satellite communication applications.Highlights EMI SE of CPNC increases with the wt% of CNT in the polypyrrole (PPy) matrix. The percolation threshold is observed at a low 2 wt% concentration of CNT. Thickness of the shielding material influences the EMI SE of CPNC. CPNC provides absorption‐dominated shielding.

Capacitive Low-Frequency Hydrophone Based on Micronanostructured Iontronic Hydrogel for Underwater Monitoring

“…The structure of multiwalled CNTs, characterized by high conductivity and surface area, allows them to absorb and disperse electromagnetic waves within the hydrogel, minimizing the propagation of electromagnetic interference. 40,41 This dispersion effect contributes to reducing electromagnetic radiation interference and enhancing electromagnetic interference (EMI) resistance. Furthermore, as the frequency increases, the waveform of the RHC-14 becomes purer, highlighting its advantage in higher frequency ranges.…”