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<p>To extend the range of multifunctional materials for advances in flexible-type energy storage, microelectronic, and optoelectronic devices, herein, a comprehensive study is performed on the thermal, structural, optical, dielectric, and electrical properties of a set of <i>x</i>P(VDF-HFP)/(100-<i>x</i>)PMMA-5 (wt%) BaTiO<sub>3</sub> polymer nanocomposite (PNC) films, composed of varying compositional ratio polymer blend host matrices with <i>x</i> values 00, 20, 50, 80, and 100 wt% and a fixed amount (5 wt%) of nanofiller. The DSC thermograms of these PNCs reveal a slightly improved thermal stability of P(VDF-HFP) crystallites but reduced degree of crystallinity on dispersing the fixed amount of BaTiO<sub>3</sub> nanoparticles as compared to the respective polymer blend host matrices. The FTIR transmittance spectra demonstrated predominantly the physical confinement of the dispersed nanoparticles in the heterogeneous structure of these blended polymers. XRD pattern confirmed the existence of dispersed BaTiO<sub>3</sub> nanoparticles and also formation of P(VDF-HFP) crystal phases in the polymer blend host matrix. The UV-Vis absorbance spectra revealed a considerable enhanced absorbance of the PNC films compared to their varying compositional ratio polymer blend matrices, whereas the dual bandgaps of values around 5&#xa0;eV and 3&#xa0;eV explain these PNCs functioning as wide bandgap semiconductor materials. The dielectric permittivity values of the prepared PNCs were enhanced substantially over the entire broadband frequencies (20&#xa0;Hz to 1&#xa0;GHz) of the applied harmonic electric field, and the relative enhancement is found to be polymer blend compositional ratio dependent. Dielectric spectra of these PNCs described the contribution of Maxwell-Wagner-Sillars (MWS) type interfacial polarization along with dipolar polarization in the enhancement of frequency-dependent permittivity values. The structural relaxations corresponding to the chain segmental motion and the rotation of the functional groups of blended P(VDF-HFP)/PMMA were explored, which are moderately hindered by the dispersed BaTiO<sub>3</sub> nanoparticles. The enhanced dielectric properties which tuneable with polymer blend compositions of the prepared PNCs confirmed their suitability in the development of broadband frequency range workable energy storage and micro-electronic devices, whereas the wide bandgap semiconductor characteristics of these composite materials explain their potential uses in advances of optoelectronic device technologies.</p>

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P(VDF-HFP)/PMMA-BaTiO3 nanocomposite films of enhanced dielectric and optical properties through a fixed concentration of nanofiller and well tunable with polymer blend compositions

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Chandra Prabha Charan,
  • R.J. Sengwa

摘要

To extend the range of multifunctional materials for advances in flexible-type energy storage, microelectronic, and optoelectronic devices, herein, a comprehensive study is performed on the thermal, structural, optical, dielectric, and electrical properties of a set of xP(VDF-HFP)/(100-x)PMMA-5 (wt%) BaTiO3 polymer nanocomposite (PNC) films, composed of varying compositional ratio polymer blend host matrices with x values 00, 20, 50, 80, and 100 wt% and a fixed amount (5 wt%) of nanofiller. The DSC thermograms of these PNCs reveal a slightly improved thermal stability of P(VDF-HFP) crystallites but reduced degree of crystallinity on dispersing the fixed amount of BaTiO3 nanoparticles as compared to the respective polymer blend host matrices. The FTIR transmittance spectra demonstrated predominantly the physical confinement of the dispersed nanoparticles in the heterogeneous structure of these blended polymers. XRD pattern confirmed the existence of dispersed BaTiO3 nanoparticles and also formation of P(VDF-HFP) crystal phases in the polymer blend host matrix. The UV-Vis absorbance spectra revealed a considerable enhanced absorbance of the PNC films compared to their varying compositional ratio polymer blend matrices, whereas the dual bandgaps of values around 5 eV and 3 eV explain these PNCs functioning as wide bandgap semiconductor materials. The dielectric permittivity values of the prepared PNCs were enhanced substantially over the entire broadband frequencies (20 Hz to 1 GHz) of the applied harmonic electric field, and the relative enhancement is found to be polymer blend compositional ratio dependent. Dielectric spectra of these PNCs described the contribution of Maxwell-Wagner-Sillars (MWS) type interfacial polarization along with dipolar polarization in the enhancement of frequency-dependent permittivity values. The structural relaxations corresponding to the chain segmental motion and the rotation of the functional groups of blended P(VDF-HFP)/PMMA were explored, which are moderately hindered by the dispersed BaTiO3 nanoparticles. The enhanced dielectric properties which tuneable with polymer blend compositions of the prepared PNCs confirmed their suitability in the development of broadband frequency range workable energy storage and micro-electronic devices, whereas the wide bandgap semiconductor characteristics of these composite materials explain their potential uses in advances of optoelectronic device technologies.