Structural, Electrical and Dielectric Characteristics of polypyrrole doped polyvinyl alcohol / carboxymethyl cellulose blended polymer

Abstract

In order to establish polymeric nanocomposite films, polypyrrole (PPy) has been mixed with carboxymethyl cellulose (CMC) and polyvinyl alcohol (PVA), which have been utilized as polymeric matrices in capacitive energy storage filed. X-ray diffraction and scanning electron microscopy equipment were utilized to examine the structure and morphology of all PVA/CMC/x wt % PPy blended polymers. Complex electric modulus, dielectric constant, ac conductivity, complex impedance spectroscopy, and temperature-and frequency-dependent PPy doping levels were investigated in PVA/CMC/x wt % PPy samples. Sample with x = 0.1 has the greatest achievable energy density (U) value and maximum ac conductivity. Elevating the temperature for all samples enhanced the values of U. The AC conductivity's conduction mechanism is also determined. The PPy doping and the temperatures varied the relaxation times of all samples. Cole-Cole figures of all samples are influenced by the amount of PPy and the temperatures. The doped samples exhibit higher dc conductivities than the undoped samples at temperatures up to 330 K. Samples with x = 0.2 and x = 0.4 exhibited greater conductivity than the pure sample above this temperature range. Depending on the temperature range, the unfilled blend range has two activation energies (E_a) values of 0.12 eV and 0.57 eV. The E_a values of the host polymer change in response to the doping amount of PPy. These results indicate that the produced samples could be used for capacitive energy storage.