INFLUENCE OF TECHNOLOGICAL CONDITIONS AND CONTAIN OF NANOPARTICLE REINFORCING PHASES TiO_2 AND Bi_2O_3 ONOPTICALPROPERTIES, AND MORPHOLOGY OF COMPOSITE MATERIALS WITH A POLYMERIC MATRIX

摘要

The aim of this paper is to present influence of technical parameters on optoelectronic properties and structure of composite materials with a polymer matrix reinforced by TiO_2 and Bi_2O_3 nanoparticles. The thin films of composite material were prepared by using spin-coating method with various spinning rates from solutions of different concentration of nanoparticles. Dimetyloformamid (DMF) was used as a solvent. The advantages of the used method are low cost, simplicity and low time-consuming. Surface morphology of obtained thin films wasinvestigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Optoelectronic properties were investigated using UV-Vis spectroscopy and elipsometry. The purpose of the study was to obtain results that allowed to determine the influence of parameters of coating process on composite material properties. It is expected that optimisation of the spinning rate and the concentration of nanoparticles in the composite material would provide the required properties. It was noticed that the surface morphology of the obtained composite materials depends on the applied spinning rate, spinning time and nanoparticles concentration. Simultaneously it was noticed the nanoparticles concentration has the greatest impact on the optoelectronic properties.