电介质
材料科学
复合数
复合材料
介电损耗
相(物质)
共晶体系
色散(光学)
结晶
透射率
化学工程
微观结构
光学
化学
有机化学
光电子学
工程类
物理
作者
Muhua Yuan,Haijun Wang,Tong Wang,Haibo Yang,Chunlei Yuan
出处
期刊:ACS applied polymer materials
[American Chemical Society]
日期:2023-03-23
卷期号:5 (4): 2664-2673
被引量:5
标识
DOI:10.1021/acsapm.2c02241
摘要
The high dielectric constant of PVDF is very important for its high-performance energy storage dielectrics, but it is more critical to strike a proper balance between high dielectric constant and low dielectric loss. In this work, deep eutectic solvent (DES) and montmorillonite (MMT) have been used together to prepare γ-phase PVDF composite films with excellent dielectric properties. It is found that DES significantly induces crystallization of γ-phase and increases the dielectric constant of the composite due to the incremental ion motion. Meanwhile, DES greatly promotes the stripping and dispersion of MMT layers, which in turn inhibits the long-range ion migration and therefore suppresses the dielectric loss of the composite to a very low level. The dielectric constant of PVDF/MMT/DES composite films can increase to 32, while the dielectric loss remains as low as 0.06 at 1 kHz. Moreover, the synergistic effect of MMT/DES also contributes to enhancing the toughness and optical transmittance of composite films.
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