наночастинки

Polymers with terminal epoxy, phosphate, fluoroalkyl groups were obtained by radical polymerization in the presence of chain transfer agents derived from isopropylbenzene. The structure of polymers was confirmed by NMR spectra and functional analysis. Polymers with functional fragment were used for synthesis of polymer-inorganic particles and copolymers with poly(2-ethyl-2-oxazoline) fragment.

The production of silver nanoparticles was carried out in an aqueous medium treated by discharge of the contact non-equilibrium low-temperature plasma in the presence of sodium alginate (1.25–5.0 g/l). The formation of silver metal particles (to 100 nm) was confirmed by X-ray diffraction and IR spectroscopy analysis. The obtained colloidal solutions of silver nanoparticles lead to the formation of thinner biofilm under microbial corrosion of mild steel, initiated by sulfate reducing bacteria of Desulfomicrobium genus.

Cross-linked polymeric and nanocomposite films based on poly(2-ethyl-2-oxazoline) and modified mineral nanoparticles of hydroxyapatite and silica have been obtained via radical cross-linking initiated by peroxide containing reactive copolymers. The influence of temperature and additional cross-linking agents on the peculiarities of curing process has been studied. The obtained results reveal that at high temperatures the dependence of film gel-fraction values on time has the extremal character.

Cross-linked nanocomposite hydrogels based on poly(acryl amide) and mineral nanoparticles (NP) of hydroxyapatite (HAP), ZnO, TiO2 modified by reactive polymers were synthesized via the technique of polymerization filling. It was shown that physico-mechanical properties of obtained nanocomposites are determined to a great extend by the nature of the modifier of mineral NP.

One of the promising methods of such a modification is a method of galvanic replacement, which is characterized by wide possibilities of controlled influence on the morphology of the deposited nanostructured metal. The deposition of silver by galvanic replacement is most studied in aqueous solutions of AgNO3 in the presence of HF. However, the hydrolysis of formed compounds of silicon, the change in pH, and the electrical renewal of hydrogen do not always provide a controlled formation of metal nanoparticles.

The silver nanostructures obtaining was investigated by electrochemical deposition from aqueous solutions (1–10) mM AgNO3 + 50 mМ NaPA) onto graphite substrate. The influence of the concentration of silver ions and cathode potential values in the range E = -0,2 – -1,0 V on surface filling degree and geometry of silver particles was (had been) studied. 

The electrochemical co-deposition of palladium and gold on the glassy carbon surface from solutions of their salts in dimethylsulfoxide (DMSO) is studied. It is shown that the precipitate in the form of discrete sphere-like particles of 30...140nm, which are uniformly distributed on the substrate, is formed  at concentrations of 0.004M PdCl2 + (0.002...0.004)M HAuCl4 + 0.05M Bu4NClO4, E = -0.3...-1.5V, at pulse electrolysis.