Synergistic enhanced dielectric properties of PVDF nanocomposites containing γ-oxo-pyrenebutyric acid functionalized graphene and BaTiO3 nanofillers

Influence of Nano-CeO2 and Graphene Nanoplatelets on the Conductivity and Dielectric Properties of Poly(vinylidene fluoride) Nanocomposite Films

“…In particular, the PVDF/CeO 2 /GNP NCs with 7.5 wt % CeO 2 + 2.5 wt % GNPs loading demonstrated elevated dielectric permittivity compared to that of other compositions at lower frequencies. This rapid increase in dielectric permittivity can be because of two factors: (i) a more pronounced interfacial polarization effect resulting from the extensive interfacial area among CeO 2 NPs, GNPs, and the PVDF matrix and (ii) the high length-to-diameter ratio, which facilitates the establishment of connectivity between the particles forming clusters. , Table provides a comparison of the highest dielectric constant values obtained for various PVDF-based NCs with dual nanofillers. ,,− Figure illustrates frequency-dependent loss tangent (tan δ) plots of PVDF/CeO 2 and PVDF/CeO 2 /GNP NCs measured across different temperatures. The presence of CeO 2 in PVDF results in tan δ values ranging from 0.5 to 2.5 at a frequency of 50 kHz, exhibiting a symmetric decline with increasing frequency.…”

Current and future applications of PVDF-carbon nanomaterials in energy and sensing

“…Sridhar et al [125] reported the NG-based on PVDF/Cloisite-30B and PVDF/BaTiO3/G. Xu et al [296] studied PVDF/(γ-oxo-pyrenebutyric acid)-modified graphene and BaTiO3 reporting the improvement of dielectric constant and this effect was not only caused by high dielectric constant of BaTiO3 but also by polarization of the nanofillers. Zhou et al [118] reported BaTiO3@carbon nanoparticle-enabled P(VDF-TrFE) composites for the application in PENGs (GO -P(VDF-TrFE) composite fibers were also studied [297]).…”

High-performance, fluorescent, UV-shielding, triboelectric, super-flexible polyurea elastomers via strong π–π stacking of pyrene and hydrogen bonding strategies

“…The large conjugate area of pyrene is very favorable for the dispersion of graphene. 47,48 Here, pyrene groups attach to the surface of graphene through p-p stacking. The larger polyurea backbone acts as a barrier to prevent stacking between graphene sheets, and the graphene dispersion solution obtained is very stable.…”