Issue 21, 2025

Fe3O4-loaded carbon nanotubes to enhance electromagnetic shielding of PAM/L hydrogels

Abstract

Carbon nanotubes (CNTs) are common fillers, but their nanoscale radial size still offers great potential for processability. In this study, the mechanical strength and electrical conductivity of hydrogels were significantly improved by modulating the introduction strategies of CNTs and Fe3O4@CNTs, followed by synergistic interaction with Linum fiber (L). The results showed that the maximum compressive strength of the prepared hydrogel PAM/L/4-CNTs reached 17.82 kPa, and the electrical conductivity of PAM/L/6-CNTs reached 2.91 S m−1. In addition, the interfacial polarisation effect enhanced the electromagnetic shielding (EMI) performance, with an average shielding effectiveness (SET) of 43.29 dB for PAM/L/6-CNTs, while the SET of Fe3O4@CNTs reached 41.52 dB at 4 wt%. All samples exhibited an absorption mechanism for electromagnetic shielding.

Graphical abstract: Fe3O4-loaded carbon nanotubes to enhance electromagnetic shielding of PAM/L hydrogels

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Article information

Article type
Paper
Submitted
27 Mar 2025
Accepted
30 Apr 2025
First published
13 May 2025

New J. Chem., 2025,49, 8632-8638

Fe3O4-loaded carbon nanotubes to enhance electromagnetic shielding of PAM/L hydrogels

H. Wang, Y. Xu, T. Zhou, K. Diao, X. Long, D. Zhang and S. Qin, New J. Chem., 2025, 49, 8632 DOI: 10.1039/D5NJ01366F

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