Cellulose derivative/barium titanate composites with high refractive index, conductivity and energy density

This work deals with hydroxypropyl cellulose (HPC)/barium titanate (BT) composites, having small levels of perovskite-like BT loading, i.e. 0.5–2% and being designed for electric energy storage applications. The films were obtained by solution “casting method their structural properties confirmed FTIR. Scanning Electron Microscopy scans reveal that ceramic filler is well uniformly dispersed within the cellulosic matrix. UV–VIS spectroscopy data indicate a slight increase absorption decrease optical band gap from 5.71 eV HPC matrix (0% BT) to 5.20 sample containing 2% BT. According refractometry analyses, presence particles determines an in polarizability, reflected higher refractive index, namely 1.533 1.605 at 486 nm 0% samples, respectively. values dispersion single-oscillator are decreasing after filling BT, whereas first/third order susceptibilities nonlinear index increasing. Mechanical tests show incorporation value Young modulus 239 MPa pure 342 Dielectric studies prove samples exhibit significant change real part permittivity ranging 4.2 neat up 8.5 HPC/BT 2%.