期刊
ADVANCED COMPOSITES AND HYBRID MATERIALS
卷 4, 期 3, 页码 505-513出版社
SPRINGERNATURE
DOI: 10.1007/s42114-021-00224-1
关键词
Polymer-matrix composites (PMCs); Synergism; Electric conductivity; Electromagnetic interference shielding
资金
- National Natural Science Foundation of China [51803190]
- Provincial and Ministerial Co-construction of Collaborative Innovation Center Foundation for Resource Materials [zycl202004]
- National Key RAMP
- D Program of China [2019YFA0706802]
The study prepared ultrathin flexible poly(vinylidene fluoride) (PVDF) composite films with MXenes and silver nanowires (AgNWs) through a solution casting method, showing enhanced electrical and thermal conductivity as well as EMI shielding compared to PVDF/MXene and PVDF/AgNW films. The main EMI shielding mechanism is absorption, and possible synergistic mechanisms for enhancing EMI shielding and mechanical performance are discussed. This work provides a promising solution for EMI shielding challenges in modern smaller wearable devices.
Herein, ultrathin flexible poly(vinylidene fluoride) (PVDF) composite films with MXenes and silver nanowires (AgNWs) were prepared via solution casting method. Due to the synergistic effects induced by MXene/AgNW network, the electrical conductivity, thermal conductivity, and electromagnetic interference (EMI) shielding of PVDF/MXene/AgNW films were higher than the corresponding PVDF/MXene and PVDF/AgNW films, and the values of PVDF/MXene/AgNW films at 300 mu m thickness were reached 1.08 S/m, 0.78 W/(mK), and 25.87 dB, respectively. Additionally, due to the ultrathin thickness, the high specific shielding value of 1091 dB cm(2)/g was achieved. Moreover, the total shielding effectiveness increased from 19.31 to 41.26 dB as the thickness was increased from 150 to 600 mu m. The main EMI shielding mechanism is contribution to the absorption. The possible synergistic mechanisms for enhancing EMI shielding and mechanical performance are discussed. This work offers a promising solution for EMI shielding challenges in modern smaller and smaller wearable devices.
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