Хімія та хімічні технології
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Item The influence of oxidation and heat treatment on the bromination of activated carbon surface(Видавництво Львівської політехніки, 2013) Klypa, Kristina; Veselovskyi, Volodymyr; Zaderko, Oleksandr; Diyuk, Vitaliy; Ischenko, OlenaAbstract – The bromination of activated carbon as a method of the surface functionalization of carbon materials was investigated. It was found that the bromination with an aqueous solution of Br2•KBr is accompanied by the oxidation of the surface. The influence of the surface oxidation and heat treatment on the bromination of activated carbon samples was examined. It was found that the heat treatment can partially or fully recover the reactivity of the surface of the oxidized carbon materials by removing the oxygen-containing functional groups.Item Structure and morphology of the polyaniline / polyethylene terephthalate / polyaniline films(Видавництво Львівської політехніки, 2013) Hnizdyukh, Yulya; Zastavs’ka, Galyna; Yatsyshyn, МykhayloIt was investigated the possibility of the modifying of polyethylene \ terephtalate films substrates by polyaniline during chemical oxidative polycondensation under the different concentrations of aniline in 0.5 M citrate acid aqueous solution. Structure and morphology of bilateral polyaniline films on polyethylene terephtalate substrates (polyaniline / polyethylene terephtalate / polyaniline) has been studied by UVvisible and FTIR spectroscopy, X-ray diffraction analysis, optical microscopy and scanning electron microscopy methods. It is shown that polyaniline films have amorphous-crystalline structure, where polyaniline is in a state of emeraldine salt of citric acid. The morphology of the films is a combination of a smooth surface with delocalized inclusions of polyaniline dendrites.