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<p>Detailed investigation on microstructural, phases, morphological and dielectric behavior of polyvinylidene fluoride (PVDF) and its nanocomposites filled with MoS<sub>2</sub> and h-BN as 2d nanofillers has been carried out. Modifications in surface morphology with reduced spherulitic crystals&#xa0;size and lower crystallinity have been observed with the addition of nanofiller. Non-polar to polar phase conversion and excellent dielectric properties with the addition of nanofillers were experimentally measured over a temperature (80–473&#xa0;K) and frequency range (10 Hz to 8 MHz). Strong interfacial polarization and interaction between PVDF dipoles and filler nanoparticles delays the relaxation process, typically showing a non-Debye behavior and were analyzed using the Havriliak–Negami function. To suppress electrode polarization, which typically appears at low frequencies obscuring the relaxation processes occurring in the low-frequency regime, electric modulus formulism was used and analyzed by using the modified Kohlrausch–Williams–Watts function.</p>

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Temperature dependencies of dielectric relaxation dynamics in PVDF nanocomposites filled with 2d nanofillers: a comparative study of MoS2 and h-BN filled PVDF

  • 期刊论文

  • 发表日期：

    2026年1月16日

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  • Abhishek Thakur,
  • Koduri Ramam,
  • Mandeep Jangra,
  • Shamima Hussain

摘要

Detailed investigation on microstructural, phases, morphological and dielectric behavior of polyvinylidene fluoride (PVDF) and its nanocomposites filled with MoS2 and h-BN as 2d nanofillers has been carried out. Modifications in surface morphology with reduced spherulitic crystals size and lower crystallinity have been observed with the addition of nanofiller. Non-polar to polar phase conversion and excellent dielectric properties with the addition of nanofillers were experimentally measured over a temperature (80–473 K) and frequency range (10 Hz to 8 MHz). Strong interfacial polarization and interaction between PVDF dipoles and filler nanoparticles delays the relaxation process, typically showing a non-Debye behavior and were analyzed using the Havriliak–Negami function. To suppress electrode polarization, which typically appears at low frequencies obscuring the relaxation processes occurring in the low-frequency regime, electric modulus formulism was used and analyzed by using the modified Kohlrausch–Williams–Watts function.