Ultra-thin and highly flexible silver fractal dendrite/polyvinylidene fluoride composite film for efficient electromagnetic interference shielding
With the electronic products move towards to flexibility, miniaturisation and high frequency, conductive polymer composites (CPCs) with ultra-low thickness, outstanding electromagnetic interference (EMI) shielding effectiveness (SE) and excellent mechanical property are urgently needed. In this work, silver fractal dendrite/polyvinylidene fluoride (AgFD/PVDF) composite films featured with double structures (defined as two-step films) were fabricated by depositing an AgFD layer followed by the incorporating of PVDF. Thanks to the 3D fractal structures of AgFDs and highly efficient conductive network, the as-prepared two-step films exhibit high electrical conductivity of 4.18 × 10 S·m at only 10 wt% AgFD loading and about 4.18 × 10 S·m at 40 wt% loading. The excellent electrically conductive property endows the two-step films to achieve remarkable EMI SE of 46.8 dB in X-band and 42.7 dB in Ka-band at 10 wt% loading with thickness of 27 μm, and 83.3 and 105.0 dB with thickness of 33 μm as the AgFD loading up to 40 wt%, respectively. The two-step films also show high near-field EMI SE values of 46.9 ∼ 61.4 dB, which fully meets the practical commercial requirements. Additionally, the two-step films possess high flexibility and mechanical strength. Considering the outstanding electrically conductive, EMI shielding performances and excellent mechanical property, the two-step composite films present a huge potential for practical applications as high-efficient EMI protection.
National Natural Science Foundation of China;
|WOS Research Area|
Engineering, Environmental ; Engineering, Chemical
|WOS Accession No|
|EI Accession Number|
Composite films ; Electric conductivity ; Electromagnetic shielding ; Electromagnetic wave interference ; Fluorine compounds ; Fractals ; Loading ; Signal interference
|ESI Classification Code|
Materials Handling Methods:691.2 ; Electricity and Magnetism:701 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electromagnetic Waves:711 ; Information Theory and Signal Processing:716.1 ; Mathematics:921
|ESI Research Field|
Cited Times [WOS]:9
|Document Type||Journal Article|
|Department||Department of Materials Science and Engineering|
1.Shenzhen Institute of Advanced Electronic Materials,Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences,Shenzhen,518055,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
Lei，Zuomin,Wei，Jianhong,Lin，Zhiqiang,et al. Ultra-thin and highly flexible silver fractal dendrite/polyvinylidene fluoride composite film for efficient electromagnetic interference shielding[J]. CHEMICAL ENGINEERING JOURNAL,2023,452.
Lei，Zuomin.,Wei，Jianhong.,Lin，Zhiqiang.,Zhao，Tao.,Hu，Yougen.,...&Sun，Rong.(2023).Ultra-thin and highly flexible silver fractal dendrite/polyvinylidene fluoride composite film for efficient electromagnetic interference shielding.CHEMICAL ENGINEERING JOURNAL,452.
Lei，Zuomin,et al."Ultra-thin and highly flexible silver fractal dendrite/polyvinylidene fluoride composite film for efficient electromagnetic interference shielding".CHEMICAL ENGINEERING JOURNAL 452(2023).
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