1. Dielectric properties of flexible NanoCellulosic films with embeded Graphene Oxide (GO) nanoplatelets
Used in electronics as cost-effective, green and flexible, thus suitable alternative for energy storage devices.
Yasir Beeran1,2, Vid Bobnar3, Sabu Thomas1, Vanja Kokol1 1University of Maribor, Institute for Engineering Materials and Design, Maribor, Slovenia; 2Mahatma Gandhi University, International and International University Centre for Nanoscience and Nanotechnology, Kottayam, India; 3Jožef Stefan Institute, Condensed Matter Physics Department, Ljubljana, Slovenia.

2. CNF-NGO films prepared by solvent casting
Cellulose Nano-Fibrils (CNF) vs. TEMPO-CNF: few m long with a dimension of 5−20 nm, low density, high strength.
Nitrogen-doped Graphene Oxide (NGO) with planar structure and abundant oxygen-containing functional groups.
&
CNF
NGO-0.5%
NGO-1%
NGO-1.5%
NGO-2%
NGO-3%

3. Thermo-mechanical properties
CNF
TCNF
C-NGO: 3%
T-NGO: 3%
The addition of NGO to CNF/TCNF matrix:
increased Young’s modulus (25%, to MPa) and Tensile strength (33%, to MPa)
and enhanced the thermal stability.

4. CNF-GO films casted & UV-irradiated under N2
Un-treated
5h UV-irradiated
CGO: 3%
TGO: 3%
high Storage modulus (to GPa) and low Loss modulus (to MPa) at 25°C
with increased thermal stability
without using of any toxic chemicals.

5. Dieletric properties: constant () & conductivity ()
CNF-NGO at 1 MHz
CNF-GO at 1 MHz
5h UV-irradiated
The dielectric properties at high frequency region (1 MHz) show significant enhancement (Ɛl of 50-60) than reported studies for TCNF-NGO films, being even higher (Ɛl of ) using UV-irradiated TCNF-GO.