Multi-layered graphene-Fe3O4/poly (vinylidene fluoride) hybrid composite films for high-efficient electromagnetic shielding |
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| Institution: | 1. Department of Materials Engineering, Advanced Fibrous Materials Laboratory, The University of British Columbia, 2355 East Mall, Vancouver, BC, Canada V6T1Z4;2. Department of Electrical and Computer Engineering, The University of British Columbia, 2332 Main Mall, Vancouver, BC, Canada V6T 1Z4;1. Key Laboratory of Cellulose and Lignocellulosics Chemistry, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, PR China;2. University of Chinese Academy of Sciences, Beijing 100039, PR China;3. Guangdong Provincial Engineering & Technology Research Center for Fine Chemicals of Ceramic Industry, Guangzhou 510650, PR China;1. Key Laboratory of Advanced Materials Processing & Mold, Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, PR China;2. Key Laboratory for Micro-/Nano-Optoelectronic Devices, Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410022, PR China;3. Hubei Engineering Technology Research Centre of Energy Polymer Materials, School of Chemistry and Materials Science, South-Central University for Nationalities, Wuhan 430074, PR China;1. Department of Polymer Science and Engineering, Sungkyunkwan University, 2066, Seoburo, Jangan-gu, Gyeonggi-do, Republic of Korea;2. Corporate R&D Group, LG Hausys, LG Science Park, 30, Magokjungang 10-to, Gangseo-gu, Seoul, Republic of Korea;3. State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China;4. School of Mechanical Engineering, Sungkyunkwan University, 2066, Seoburo, Jangan-gu, Gyeonggi-do, Republic of Korea;5. Department of Energy Science, Sungkyunkwan University, 2066, Seoburo, Jangan-gu, Gyeonggi-do, Republic of Korea |
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| Abstract: | A flexible and multi-layered graphene nanosheets (GNSs)-Fe3O4/poly (vinylidene fluoride) hybrid composite film with high-efficient electromagnetic interference (EMI) shielding was fabricated via a facile layer-by-layer coating. The well-designed multi-layered and hybrid electromagnetic fillers endow the prepared film with good surface impedance matching and prominent internal multiple absorption, which forms “absorb-reflect-reabsorb” electromagnetic transmission pattern and results in highly efficient electromagnetic shielding effectiveness (EMI SE). The resultant composite film exhibits an exceptional EMI SE of 52.0 dB at a thickness of 0.3 mm. What is more important is that the prepared film exhibits excellent flexibility and EMI stability, and the retention rate of efficient EMI SE is high as 91.9% after 1000 bending-release cycles. This study provides a feasible strategy for designing high-efficient EMI shielding film with excellent flexibility and ultra-thin thickness that suitable for next-generation intelligent protection devices. |
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| Keywords: | EMI shielding GNSs Hybrid filler Composite film Multi-layered structure |
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