期刊
COMPOSITES SCIENCE AND TECHNOLOGY
卷 206, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2021.108663
关键词
Electromagnetic interference shielding; High absorption; Silicone rubber foam; Supercritical carbon dioxide foaming; Silver plated glass fiber
资金
- National Natural Science Foundation of China [51773138]
- Sichuan Science and Technology Program [2020YFG0098]
- Fundamental Research Funds for the Central Universities
The composite foam made of heterogeneous silicone rubber/silver plated glass fiber/multiwalled carbon nanotubes/ferroferric oxide has high EMI shielding effectiveness and absorption coefficient, with stable performance under multiple bending. It is suitable for applications in wearable flexible electronics, high-power instruments, and upcoming 5th-Generation communication products.
Heterogeneous silicone rubber (VMQ)/silver plated glass fiber (Ag@GF)/multiwalled carbon nanotubes (MWCNT)/ferroferric oxide (Fe3O4) composite foams with gradient porous structure were fabricated through layer by layer combination and supercritical carbon dioxide (scCO(2)) foaming. The average electromagnetic interference shielding effectiveness (EMI SE) and absorption coefficient (A) of the composite foam are as high as 78.6 dB and 0.82 respectively, because of the reasonable progressive dissipation mechanism. The resonance cancellation caused by the encounter of incident and reflected electromagnetic (EM) waves further improved the microwave absorbing performance of the foam, and an absorption ratio of up to 94% can be obtained at 7.68 GHz. Moreover, the composite foam exhibits excellent stability of EMI shielding performance under multiple bending. This composite foam has great application prospects in the field of EM protection of wearable flexible electronics, high-power instruments and the forthcoming 5th-Generation communication products.
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