Structural characterization and electrical properties of flexible PVC/CeO2 nanocomposites films for potential dielectric applications
摘要
In this work, PVC/CeO2 composite samples consisting of polyvinyl chloride (PVC) and cerium dioxide (CeO2) as nanofiller were fabricated by the solution casting technique. The samples were characterized by advance techniques, i.e., Raman, scanning electron microscope (SEM), X-ray diffraction (XRD), and Thermogravimetric analysis (TGA) to examine the PVC/CeO2 composites. The dielectric properties of the pure PVC and PVC/CeO2 sheets were determined over a frequency range from 10 Hz to 6 MHz. The results of the XRD and Raman confirmed the successful fabrication of PVC/CeO2 composites. The dielectric constant rose from 4.39 for pure PVC to 4.8 for PVC/(10 wt%) CeO2, while the relaxation time reduced from 1.07 × 10−5 to 5.18 × 10−6 s. Moreover, the energy density enhanced from 1.28 × 10−5 J/m3 for PVC to 1.40 × 10−5 J/m3 for PVC/CeO2. The novelty of this study lies in the impact of CeO2 nanoparticles on the PVC polymer chains to improve their dielectric behavior through interfacial polarization. The results confirm the improvement of the dielectric permittivity with controlled ratios of CeO2 and highlight the potential applications of PVC/CeO2 composites for advanced dielectric devices.