| Abstract |
Poly(vinylidene fluoride) (PVDF) nanocomposites were fabricated by incorporating BaTiO3
nanoparticles (particle size of ~100 nm, nBT), which were deposited by Au nanoparticles (nAu) with
an average particle size of 17.8 4.0 nm using a modified Turkevich method. Systematic characterizations
on the synthesized nAu-nBT hybrid nanoparticles and nAu-nBT/PVDF nanocomposites
with different contents of a filler were performed. The formation of nAu-nBT hybrid nanoparticles
was confirmed with the calculated nAu:nBT ratio of 0.5:99.5 wt.%. The homogeneous dispersion
of nAu and nBT in the PVDF polymer was obtained due to the interaction between the negative
surface charge of the nAu-nBT filler (compared to that of the nBT) and polar b-PVDF phase, which
was confirmed by the zeta potential measurement and Fourier-transform infrared spectroscopy,
respectively. A significantly increased dielectric permittivity ("0 ~ 120 at 103 Hz) with a slight
temperature-dependent of <15% ranging from 20 to 140 C was obtained. Notably, a low loss
tangent (tan < 0.08) was obtained even at a high temperature of 140 C. Therefore, incorporating a
PVDF polymer with nAu-nBT hybrid nanoparticles is an attractive method to improve the dielectric
properties of a PVDF polymer for dielectrics applications. |
Publication
Journal Publication
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