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

This article delves into the temperature-dependent dielectric relaxation dynamics of PVDF nanocomposites filled with 2D nanofillers, specifically MoS2 and h-BN. The study focuses on the structural, morphological, and dielectric behavior of these nanocomposites across a wide temperature range, from ~80 to 473 K. Key findings include the increased dielectric constant and the observation of relaxation peaks at higher temperatures and lower frequencies. The article also explores the impact of nanofillers on the phase composition and morphology of PVDF, revealing that h-BN nanofillers enhance the electroactive β phase content. Dielectric studies show that smaller h-BN nanoparticles boost the dielectric constant while maintaining lower loss, whereas MoS2-filled samples exhibit a higher dielectric constant but with increased loss. The article concludes with a comparative analysis of the activation energies for interfacial polarization and αa dielectric relaxations, highlighting the size-dependent effects of the nanofillers. This comprehensive study provides valuable insights into the behavior of PVDF nanocomposites, making it a crucial read for professionals interested in advanced materials and nanotechnology.