Morphology, Optical and Electronic Characteristics of Nanocellulose Filled with Microcrystalline Cellulose and Graphene Oxide

The morphology, optical absorption and luminescence properties were used to determine spectral characteristics of optical transmittance and absorbance, coefficient of absorption, the values of the optical band gap and Urbach energy of thin nanocellulose films and nanocellulose filled with microcrystalline cellulose or graphene oxide. The influence of noted additives on the spectral properties of composites and the characteristics of the optical band gap has been discussed. It was suggested that the difference in the effect of these additives on the properties of composites could be caused by different mechanisms of interaction of additives with the surface of nanocellulose particles.