Özet:

Organic and inorganic ion-exchange materials containing incorporated inorganic particles of ion exchangers are characterized by enhanced selectivity for ions of toxic metals and resistant to poisoning by organic substances. An important task for achieve the necessary kinetic parameters of ion exchange is to reduce the size of the incorporated particles that is particularly important for hydrated oxides containing functional groups, mainly, on the outer surface of the particles. Regularities of forming Zr(IV), Fe(III), Al(III) oxide particles in a polymeric anion exchange matrix are considered in the article. The aim of research is establishing and experimental confirmation of deposition mechanism for inorganic ionite in the polymer for directional control of size and state of the particles. Using computer analysis of TEM images it was revealed that the fractal dimension of the aggregate particles is 2,38-2,72. Nature of modifier also determines the state of the polymer particles. The effect of these factors was analyzed using the Ostwald-Freundlich equation. It was established that the primary nanoparticle size is determined by reprecipitation. Accordingly, the formation mechanism of aggregates is association of nanoparticles with a small cluster, and the limiting step is the diffusion of the polymer nanoparticles. The equation for the diffusion flux of nanoparticles was obtained and it was shown that flux slowing leads to formation of dendritic multilevel structures. The results can be used to develop technologies for ionite synthesis, ion-exchange membranes and materials for baromembrane separation. The proposed approach allows to obtain materials with a given particle size and, consequently, with certain functional properties. Author Biographies Константин Сергеевич Супруненко, National Technical University of Ukraine «Kyiv Polytechnic Institute», 37 Peremogy ave. Kyiv, Ukraine, 03056 Department of Cybernetics of Chemical Technology Processes

Anahtar Kelimeler: