Transparent, highly dielectric poly(vinylidene fluoride) nanocomposite film homogeneously incorporating BaTiO3 nanoparticles with fluoroalkylsilane surface modifier

[Display omitted] •Transparent, highly dielectric nanocomposite films fabricated.•The films composed of poly(vinylidene fluoride) (PVDF) and barium titanate (BT) nanoparticles.•The BT nanoparticles surface-modified with fluoroalkylsilane.•The nanoparticles homogeneously incorporated into PVDF at BT contents up to 67%.•The transparent nanocomposite film exhibited a permittivity as high as 44. Incorporation of barium titanate (BT) nanoparticles surface-modified with a fluoroalkylsilane into poly(vinyldene fluoride) (PVDF) was performed to fabricate transparent nanocomposite films with high permittivity. The BT nanoparticles were prepared in a sol–gel method using 2-methoxyehanol solvent. They were surface-modified with the fluoroalkylsilane to disperse them into N-methyl-2-pyrrolidone that was used in the successive process of dissolving PVDF. The surface modification with the fluoroalkylsilane was allowed to homogeneously incorporate the nanoparticles into PVDF films up to the BT content of 67vol%. No distinct decrease in film transparency by the incorporation was observed for the films at the high loadings of BT nanoparticles. The transparent nanocomposite film could attain a permittivity as high as 44 at a BT content of 67vol% with maintenance of dissipation factors lower than 0.06.