Quantifying the role of nanocarbon fillers on dielectric properties of poly(vinylidene fluoride) matrix

Abstract

Development of polymers with excellent dielectric properties is a challenge for advanced electronic devices. Impregnating conducting fillers like carbon nanoparticles can enhance the dielectric constant, retaining low loss due to its compatibility and favorable polarization within the polymer matrix. The multifunctional characteristics of coal-derived nanocarbon can improve permittivity and facilitate large-scale production at a lower cost. The incorporation of coal-based nanocarbon in the polymer matrix and its dielectric response is seldom investigated. In this work, different ratios (10:90, 50:50, 90:10 by weight) of nanocarbon/PVDF composite are prepared via a simple solution casting technique. The dielectric measurements show that nanofillers’ addition significantly augments the dielectric constant value, which is ∼3 times (50:50 composite) higher than pure PVDF. The uniform distribution of 50% filler within the polymer matrix impeded the seepage of charge at the interface and enhanced the permittivity via polarization of accumulated charges. The composite also exhibited balanced dielectric loss that is essential for energy storage applications.

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

“…and/or oxidized carbon nanoparticle from sub-bituminous coal; the maximum dielectric constant was observed for 50% of the nanofiller content [160]). A new method of obtaining new composite fillers of increasing dielectric constant is ball-milling in extensional flow field [161].…”

“…It should be recollected that the amount of applied CNM, the shielding range as well as mechanical properties should be always considered due to the practical implications. However, based on specific SE values in Table 1, one can conclude that the most effective are G based materials [164], and the most prospective/multi-functional materials are those reinforced by CF [162], MWCNT [160], MXene (MX -a new transition-metal carbides and nitrides, having a general formula Mn+1XnTx) [213,214]. According to Li et al [213], MXene reinforced PVDF/G nanocomposites have a high SE due to the synergy between extremely high thermal and electric conductivity of the obtained layered material.…”