Enhanced dielectric and energy storage performance of the PVDF–PMMA blend with GNP–MWCNT hybrids
摘要
The present study describes a simple solution casting method for creating hybrid nanocomposites using the PVDF and PMMA polymers. The structural, morphological, and dielectric properties of the multilayered conductive networks formed by the incorporation of graphene nanoplatelet-multiwalled carbon nanotube hybrids (GCHs) into the PVDF/PMMA matrix were investigated. The results of the structural and morphological analysis showed that the composites had well-defined crystalline structure and a homogeneous filler distribution. The quaternary NCs with a 1:1 MWCNTs/GNPs ratio demonstrated a real permittivity and dissipation factor of 132.8 and 0.11 for 10 wt.% at 100 Hz. The conductivity values between 10−8 S/m (10 wt.%) and 10−5 S/m (15 wt.%) were achieved by employing hybrids in equivalent proportions to create composites at 100 Hz. It was found that the electrical conductivity and permittivity values for composites increased as the GCHs concentration increased up to 10 wt.%, while the percolation threshold was reached. The highest energy density and power density are 3.05 J/cm3 and 11.93 MW/cm3, respectively. These findings suggest that the dielectric and ferroelectric performance as well as the percolation network of NCs was successfully enhanced and can be useful for energy-storing applications.