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<p>The present study investigates the impact of lead titanate nanoparticles (PTO NPs) on the physical properties of the blended polyvinylidene fluoride (PVDF). XRD and ATR/FTIR, FE-SEM&amp;EDX techniques were employed to investigate the structural, morphological, and chemical properties of the produced films. The results show that the films have a semicrystalline nature, a multiphase structure with a dominant <i>β</i>-phase, a crystallinity index in the range of 18–38%, a porous surface, grain-like morphology, high fluorine content, and uniform Pb and Ti elemental distribution. The PVDF’s transmittance (40–70%) increased upon blending with polymethyl methacrylate (PMMA), then decreased to 10–31% after PTO NPs doping. The optical band gap of PVDF can be engineered between 4.1 and 5.6 eV by PMMA and PTO contents. TGA analyses revealed the thermal stability, and DSC was employed to explore the transition temperatures of the films. Various dielectric parameters were evaluated in the frequency range of 10<sup>–1</sup>–10<sup>7</sup> Hz. PTO NPs improved the dielectric constant, maintaining the dielectric loss so small. The films exhibited DC conductivity in the range of (0.95–2.9) × 10<sup><b>–</b>11</sup> S/m, and AC conductivity in the order of 10<sup><b>–</b>3</sup> S/m at <i>f</i> ˃ 0.45 MHz, depending on the films’ composition. Loading PTO NPs significantly improved the energy density of the PMMA/PVDF blend from 4.5 J/cm<sup>3</sup> up to 6.8 J/cm<sup>3</sup>. The findings of this study reveal that the PTO/PMMA/PVDF films are the best candidates for energy storage devices with improved thermal stability and capacitive performance for microelectronics and optoelectronic devices.</p>

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Developing PbTiO3-PMMA-PVDF dielectric composites for optoelectronics and capacitive energy storage applications

  • 期刊论文

  • 发表日期：

    2025年11月14日

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  • Turki Alotaibi,
  • Adel M. El Sayed

摘要

The present study investigates the impact of lead titanate nanoparticles (PTO NPs) on the physical properties of the blended polyvinylidene fluoride (PVDF). XRD and ATR/FTIR, FE-SEM&EDX techniques were employed to investigate the structural, morphological, and chemical properties of the produced films. The results show that the films have a semicrystalline nature, a multiphase structure with a dominant β-phase, a crystallinity index in the range of 18–38%, a porous surface, grain-like morphology, high fluorine content, and uniform Pb and Ti elemental distribution. The PVDF’s transmittance (40–70%) increased upon blending with polymethyl methacrylate (PMMA), then decreased to 10–31% after PTO NPs doping. The optical band gap of PVDF can be engineered between 4.1 and 5.6 eV by PMMA and PTO contents. TGA analyses revealed the thermal stability, and DSC was employed to explore the transition temperatures of the films. Various dielectric parameters were evaluated in the frequency range of 10–1–107 Hz. PTO NPs improved the dielectric constant, maintaining the dielectric loss so small. The films exhibited DC conductivity in the range of (0.95–2.9) × 10–11 S/m, and AC conductivity in the order of 10–3 S/m at f ˃ 0.45 MHz, depending on the films’ composition. Loading PTO NPs significantly improved the energy density of the PMMA/PVDF blend from 4.5 J/cm3 up to 6.8 J/cm3. The findings of this study reveal that the PTO/PMMA/PVDF films are the best candidates for energy storage devices with improved thermal stability and capacitive performance for microelectronics and optoelectronic devices.