Abstract
With the further application of flexible film capacitor materials in the field of microelectronic devices, wearable smart device, etc., polymer-based nanocomposite dielectric materials have received extensive attention. Based on the previous research, using one-dimensional inorganic nanofibers as functional filler can effectively improve the dielectric properties of the nanocomposites. In this work, the core-shell structure BT@Al 2 O 3 nanofibers and its poly(vinylidene fluoride) (PVDF) nanocomposite films were prepared by coaxial electrospinning and casting technique, respectively. The effect of the core-shell nanofibers with different shell thickness on the dielectric properties of PVDF nanocomposite films was investigated in detail. The results show that the thickness of the shell of 5 wt% BT@Al 2 O 3 nanofibers can make more contribution to the improved dielectric permittivity of the BT@Al 2 O 3 /PVDF nanocomposite films. In addition, the introduction of the Al 2 O 3 shell nanofibers promotes the breakdown strength of the BT@Al 2 O 3 /PVDF nanocomposite films.
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