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| Synergistic enhancement of electromagnetic shielding effectiveness in graphene by SiC whiskers and CNTs |
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Received:August 10, 2025
Revised:September 02, 2025
Accepted:September 03, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2025.05.013 |
| KeyWord:silicon carbide whiskers;carbon nanotubes;graphene;composite material;electromagnetic shielding |
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| School of Materials Science and Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China |
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| Abstract: |
| Graphene demonstrates significant potential in high-tech applications, including electronics and aerospace, due to its exceptional thermal and electrical conductivity. Its superior electromagnetic interference (EMI) shielding performance further indicates promise for both civilian and military uses. This study utilized graphene oxide (GO) as the matrix, incorporating silicon carbide whiskers (SiCw) and carbon nanotubes (CNTs) as reinforcing agents and conductive bridges to enhance interlayer connectivity and overall composite performance. The SiCw/CNT/rGO composite was synthesized via hydrothermal method. The effects of SiCw and CNT contents on the composite's microstructure and properties were systematically investigated. Phase composition, microstructural features, and functional groups were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FTIR). EMI shielding effectiveness (EMI SE) was evaluated using a vector network analyzer. Results indicate that an optimal combination of SiCw and CNT promotes the formation of a three-dimensional conductive network and a multi-level porous structure. This architecture significantly enhances conductive loss and electromagnetic wave scattering loss within the material. Consequently, the optimized composite exhibits markedly improved EMI shielding performance. Within the X-band (8.2–12.4 GHz), the optimized composite material achieves an EMI shielding effectiveness (SET) of up to 77.5 dB and an absorption shielding effectiveness (SEA) greater than 65 dB, demonstrating exceptional electromagnetic protection capabilities. |
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