Porous composites coated with hybrid nano carbon materials perform excellent electromagnetic interference shielding |
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| Affiliation: | 1. Department of Materials Science and Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan, ROC;2. Laboratory for Functional Polymers, Swiss Federal Laboratories for Materials Science and Technology (EMPA), Überlandstrasse 129, 8600 Dübendorf, Switzerland;3. Department of Power Mechanical Engineering, National Tsing-Hua University, Hsinchu 30013, Taiwan, ROC;1. Department of Frontier Materials Chemistry, Graduate School of Science and Technology, Hirosaki University, Hirosaki 036-8561, Japan;2. Unimatec Co., Ltd., Kitaibaraki-shi, Ibaraki 319-1593, Japan |
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| Abstract: | This work reported preparation of porous composites using a simple dip-coating method, and the fabricated composites containing hybrid carbon nanomaterials performed excellent electromagnetic interference (EMI) shielding properties. A commercial sponge was coated with silver nanoparticles before being dip-coated with graphene (GP)/ink, multi-wall carbon nanotubes (MWCNTs)/ink, or hybrid GP/MWCNTs/ink to form Ag/carbon nanomaterial hybrid composites, and then the composites were subjected to EMI measurements in the frequency range of 0.45–1.5 GHz. For comparison, the sponges without Ag nanoparticle coating were also prepared. Herein, we found an insignificant difference in EMI SE among the porous composites without Ag nanoparticle coating, and the maximum values of approximately 14.4 dB was attained. Interestingly, the hybrid composites with Ag nanoparticle coating exhibited maximum EMI shielding of 24.33 dB. Due to their porous structure, the EMI SE measurements showed that reflection dominates the EMI SE for all the sponge composites studied in this work. |
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| Keywords: | A Hybrid A Nano-structures A Preform B Physical properties |
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