ABSTRACT

Summary ............................................................................................... 176 7.1 Introduction .................................................................................. 176 7.2 Experimental ................................................................................ 178 7.3 Results and Discussion ................................................................ 181 7.4 Conclusions .................................................................................. 192 Keywords .............................................................................................. 193 References ............................................................................................. 193

SUMMARY

The polyaniline (PAn)/nano-ТіО2-S nanocomposites were synthesized in the 0.5 M HCl aqueous solutions by oxidation of aniline in the presence of nanoparticles of mineral component (S-doped TiO2). The physico-chemical properties of produced samples were studied with use of X-ray diffraction phase analysis, FTIR and EDX spectroscopy, SEM microscopy, thermogravimetric and electrochemical methods. It was determined that the morphology of synthesized samples changes from aggregative (3D net structure) to thin polymeric layers on the surface of TiO2-S nanoparticles with increasing of the mineral component content in the composite. In the last case a polyaniline is characterized by sufficiently ordering of macromolecules in the result of interfacial interaction, namely H-bonding between polymeric macromolecules and surface of TiO2-S nanoparticles. Besides, it was determined, that the increasing of content of the mineral component leads to the increasing of the thermal stability of the PAn/nanoТіО2-S composite in comparison with the individual polyaniline, but to the decreasing of electric conductivity of samples.