Abstract
Polyvinyl alcohol (PVA)/polyethylene glycol (PEG) blend nanocomposite films reinforced with various loadings of carbon black nanoparticles (CBNPs) were synthesized via a solution casting approach. The structural properties of PVA/PEG/CBNPs nanocomposites were investigated using Fourier-transform infrared (FTIR) spectroscopy, indicating the strong interaction of CBNPs with the polymer blend. The thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) results respectively confirmed the enhanced thermal stability and the variation in the melting temperature with the addition of CBNPs in polymer blend . The dielectric measurements of nanocomposite films were carried out over a frequency range from 50 Hz–20 MHz at a varied temperature range from 40 °C–150 °C using impedance analyzer . The maximum dielectric constant for neat PVA was observed to be about 21.4 at 50 Hz and 150 °C. For PVA/PEG/CBNPs nanocomposites having higher loading of CBNPs (25 wt%) the maximum value of dielectric constant was found to be ε = 375.1 at 50 Hz, 150 °C. The dielectric properties increased with the addition of CBNPs which validates a significant control on percolation threshold attributing to the well-dispersed CBNPs in the polymer blend. The electromagnetic interference (EMI) shielding effectiveness (SE) was improved from 0.1 dB to 10.6 dB with the addition of CBNPs in the PVA/PEG blend. The improved EMI SE and dielectric performance of these nanocomposites suggest CBNPs as excellent nanofillers for the development of flexible, lightweight and low-cost material for electronic applications.
Highlights
Modern society is concerned with the unwanted electromagnetic interference (EMI) signals that arise due to the evolution in the consumption of industrial, commercial, military, wireless and high-speed communication systems
The thermogravimetric analysis (TGA) results indicate significant decrement in the weight loss with the incorporation of carbon black nanoparticles (CBNPs) in the polymer matrix. This decrease in weight loss was attributed to the formation of a strong interface between polymer matrix and the CBNPs thereby improving the thermal stability of Polyvinyl alcohol (PVA)/polyethylene glycol (PEG)/CBNPs nanocomposites as compared to the PVA/PEG blend
The incorporation of CBNP in the PVA/PEG blend leads to the significant enhancement in the dielectric constant indicating the homogeneous dispersion of nanofiller within the polymer matrix
Summary
Abstract attribution to the Polyvinyl alcohol (PVA)/polyethylene glycol (PEG) blend nanocomposite films reinforced with author(s) and the title of the work, journal citation various loadings of carbon black nanoparticles (CBNPs) were synthesized via a solution casting and DOI. The structural properties of PVA/PEG/CBNPs nanocomposites were investigated using. Results respectively confirmed the enhanced thermal stability and the variation in the melting temperature with the addition of CBNPs in polymer blend. For PVA/PEG/CBNPs nanocomposites having higher loading of CBNPs (25 wt%) the maximum value of dielectric constant was found to be ε = 375.1 at 50 Hz, 150 °C. The dielectric properties increased with the addition of CBNPs which validates a significant control on percolation threshold attributing to the well-dispersed. The electromagnetic interference (EMI) shielding effectiveness (SE) was improved from 0.1 dB to 10.6 dB with the addition of CBNPs in the PVA/PEG blend. EMI SE and dielectric performance of these nanocomposites suggest CBNPs as excellent nanofillers for the development of flexible, lightweight and low-cost material for electronic applications
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