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Research Article | Open Access

Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites

Ke Jiang1, Zhi Chen Ji1, Yu Chen Zheng1, Shan Huang2 ( ), Ming Wang1,3 ( )
Chongqing Key Laboratory of Soft-Matter Material Manufacturing, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
School of Mechanics, Civil Engineering and Architectures, Northwestern Polytechnical University, Xi’an 710072, China
Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
Show Author Information

Graphical Abstract

Surface concave-convex and zig-zag micro-arrays can abruptly enhance electromagnetic shielding performance of materials due to the construction of resonator effect, multiple reflections, multiple scattering, and interference cancellation of electromagnetic waves at these surface structures.

Abstract

Herein, the electromagnetic shielding performance of surface concave-convex (SC) and zig-zag micro-arrays was studied by using a simulation prediction and a three-dimensional (3D) printing custom model. Firstly, surface stripe concave-convex (SSC) and surface cylindrical concave-convex (SCC) micro-arrays with or without zig-zag micro-arrays are designed, and their shielding performance is simulated in multi-bands (C-, X-band). The multiwalled carbon nanotubes/polydimethylsiloxane composites (MWCNT/PDMS) with different SC structures and different electrical conductivity are molded in acrylonitrile-butadiene-styrene copolymer (ABS) molds which are printed by a 3D printer. The results show that the electromagnetic interference shielding effectiveness (EMI SE) of the samples can be enhanced by constructing the SC micro-arrays with zig-zag micro-arrays, and improving with the increase of conductivity and frequency. In addition, the shielding mechanism of the SC-MWCNT/PDMS composites is investigated and discussed by an electromagnetic simulation.

Keywords

surface micro-arrayselectrical propertieselectromagnetic interference (EMI) shieldingthree-dimensional (3D) printing

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Nano Research
Volume 18 Issue 1,
January 2025
Article number: 94907153
DOI: 10.26599/NR.2025.94907153
Cite this article:
Jiang K, Ji ZC, Zheng YC, et al. Surface micro-arrays enhancing electromagnetic interference shielding of polydimethylsiloxane/multiwalled carbon nanotubes nanocomposites. Nano Research, 2025, 18(1): 94907153. https://doi.org/10.26599/NR.2025.94907153
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Received: 01 November 2024
Revised: 21 November 2024
Accepted: 24 November 2024
Published: 25 December 2024
© The Author(s) 2025. Published by Tsinghua University Press.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/).
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