Abstract
In the present study, PVDF-Er 2 O 3 polymer nanocomposite films were synthesized at 85 °C via the solution casting method. Structural characterization of the nanocomposite films was determined from XRD, SEM and FTIR analysis. The results indicate a semicrystalline nature of the PVDF nanocomposite films. The crystal structure of Er 2 O 3 nanoparticles is cubic with an average crystallite size of 39 nm. Images from the SEM microscopy confirmed uniform dispersion of nano-Er 2 O 3 with small agglomerations. FTIR measurements revealed the characteristic bands of α, β and γ phases for PVDF in all nanocomposite films. From TGA analysis, the onset temperature of degradation decreases as Er 2 O 3 weight percentage increases in the PVDF polymer matrix. Dielectric analysis revealed the increase of real permittivity for the PVDF-Er 2 O 3 nanocomposites with increasing Er 2 O 3 content. At 3.0 wt% of Er 2 O 3 , the maximum permittivity was achieved. It is also noticed that the nanocomposite film with a concentration of 1.0 wt% gave the highest energy density. • Nanocomposites of PVDF-Er 2 O 3 prepared by a solution casting method. • XRD results indicate a semicrystalline nature of the PVDF nanocomposites. • At 3.0 wt% of Er 2 O 3 , the maximum dielectric permittivity was achieved. • The nanocomposite film doped with 1.0 wt% of Er 2 O 3 gave the highest energy density.
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