Cyanoethyl Cellulose/BaTiO3/GO Flexible Films with Electroconductive Properties

Abstract

Indispensable modification of cellulose has been carried out to produce cyanoethyl cellulose (CEC) to overcome the obstacles of the direct use of cellulose as film form rather than enhancing its physicochemical properties. Barium titanate (BTO) and/or graphene oxide (GO) were used as fillers in the cyanoethyl cellulose matrix to form films of different composite, CEC/GO, CEC/BTO, and CEC/GO/BTO films. XRD and FTIR were used to confirm the composition of the composites. The effects of embedded mass fraction of BTO and/or GO on the thermal stability, mechanical properties, and dielectric properties of the prepared composite films were investigated. The diffuse reflectance spectra showed that the optical band gap energy of the prepared composites was increased from 0.922 eV to 1.003 eV with an indirect allowed type. Dielectric measurements were carried out over the wide range of 4 Hz to 8 MHz. The dielectric constant increased to 1505 at 100 Hz for CEC loaded with graphene oxide and barium titanate while the conductivity was increased to 1.03 * 10−3 S cm−1. These observations indicated that this kind of composite would be helpful in various industrial applications with high dielectric permittivity in the embedded capacitor field.