Effect of CuO nanofiller on the spectroscopic properties, dielectric permittivity and dielectric modulus of CMC/PVP nanocomposites

Abstract

System of nanocomposite films containing carboxymethyl cellulose (CMC) and polyvinyl pyrrolidone (PVP) embedded copper oxide (CuO) nanoparticles were synthesized using the casting method solution and it was described by appropriate techniques. The semicrystalline nature of the structure for the nanocomposites was confirmed by X-ray spectra. The main characteristic bands of IR groups of CMC and PVP were clearly founded in the IR spectra. The intensity of some bands was reduced confirms a well reacts between CuO the main IR groups inside CMC/PVP polymer were occurring. The estimations of M′ were studied according to the conduction phenomenon related to short-range mobility of charge carriers. Minimum values of M″ at lower frequency were attributed to the indication of transport for ions with one relaxation peaks were founded which increase with an increase of CuO attributed to the relaxation process. The presence of a semicircle shape in the relation between M′ and M″ was observed demonstrating the presence of broad relaxation processes. The behaviour of ɛ′ was reduced as an increase of the frequency ascribed to polarization effects and it reaches to constant values at a higher frequency according to the contribution for charge accumulation. The behaviour of Z′ and Z″ was reduced as the increase of frequency as well as CuO. The magnitude of tan δ was also reduced because the hopping of charge carriers does not cause any changes of the applied field. Keywords: CMC/PVP nanocomposites, CuO nanoparticles, X-ray, FT-IR, Dielectric permittivity, Dielectric modulus