Abstract
The structural, dielectric and electrical properties of multiwall carbon nanotube (MWCNT) dispersed polymer nanocomposite films (PPy) of Polyvinyl alcohol (PVA) blended with Sodium Carboxymethyl cellulose (CMC) and doped with Polypyrrole (PPy) is reported here. Free standing and flexible polymer nanocomposite films (PNC) were prepared by solution cast technique. The XRD study shows that amorphousness of the films increases with blending PPy in PVA-CMC matrix and also by increasing concentration of MWCNT nanopowder in PVA-CMC matrix. Molecular interaction between polymer–polymer and polymer- nanoparticle was studied using FTIR in attenuated total reflection (ATR) mode. Frequency dependent dielectric properties of these PNC films were studied in the frequency range of 100 Hz – 2 MHz. Flexible, biocompatible polymer nanocomposite films of PVA-CMC-PPy having MWCNT (5 wt)% showed appreciable rise in the values of dielectric constant and ac conductivity for measured frequency range.
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