Synthesis of flexible polymer nanocomposites based on methyl cellulose/copper oxide with desired dielectric properties for electrical applications

Herein, flexible MC/CuO composite consisting of methyl cellulose (MC) and copper oxide (CuO) were successfully fabricated by casting solution technique. The synthesized films were characterized by XRD, FTIR, and EDX methods, which confirm the successful preparation of the composite MC/CuO. Moreover, SEM images are investigated homogenous distribution of CuO in MC. The modulus, conductivity, and impedance of MC and CuO films were measured in frequency 50 Hz to 5 × 105 Hz. The addition of CuONPs to MC films induces a significant improvement in the permittivity due to the high level of scission. The conductivity is raised from 0.08 × 10−6 S/cm for MC to 6.77 × 10−6 S/cm for MC/9%CuO, and the dielectric constant raised from 6.32 to 70.6 at frequency of 100 Hz. The energy density is increased for MC from 2.79 × 10−5 J/m3 to 18.5 × 10−5 J/m3 and to 31.2 × 10−5 J/m3 by enhancing CuO content from 3% to 9% respectively. The barrier potential energy Wm was lowered from 0.58 eV for MC to 0.38 eV and to 0.36 eV after the increases CuO content from 3% to 9%. This results confirmed an improvement in the characteristics of MC/CuO films to be applied these films in a variety of industrial devices, including batteries and super-capacitors.