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Molecular structure and morphology of coatings based on polyethylene glycol and silver nanoparticles obtained from active gas phase

Keywords:

M.A. Yarmolenko - Ph.D. (Eng.), Associate Professor, F. Scorina Gomel State University (Gomel). Е-mail: simmak79@mail.ru


The article determines the kinetic, physical and chemical laws of deposition of thin composite coatings based on polyethylene glycol and silver nanoparticles from the active gas phase formed by electron-beam dispersion of the polymer and silver salt, as well as the changes in structure and morphology under their heat treatment. The paper shows that during the heat treatment of coatings baed on AgNO3 salt decomposition occurs with the formation of silver nanoparticles. The decomposition of the salt to a metal occurs sequentially through the stage of formation of silver oxide. The polyethylene glycol matrix prevents the coalescence of the nanoparticles formed and thermally stabilizes the salt. The formation of a considerable amount of silver oxide in the composite layer during the heat treatment is a consequence of the salt thermal stabilization. Annealing of the polyethylene glycol layer in the presence of silver nitrate is not accompanied by an intense thermal oxidative destruction of the organic material. Composite silver-containing coatings based on PEG may be used as prolonged antibacterial layers on implant surfaces.
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