Engels State Technological Institute

Engel’s, Russia

Engels State Technological Institute

Engel’s, Russia
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Vol'Fkovich Y.M.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | Kardash M.M.,Engels State Technological Institute | Kononenko N.A.,Kuban State University | Aleksandrov G.V.,Engels State Technological Institute | Chernyaeva M.A.,Kuban State University
Russian Journal of Electrochemistry | Year: 2013

Peculiarities of the porous structure and hydrophilic-hydrophobic properties of composite ion-exchange membranes Polycon K based on novolac phenolformaldehyde fibers are studied by the method of standard contact porosimetry. Differences are revealed in the values of maximum porosity, internal specific surface, volume of macropores, and other structural characteristics associated with different conditions of sulfonation of fibers. The formation of pores in the fibrous phase at the diffusion of monomers during the preparation of membranes is confirmed by the data of scanning electron microscopy and differential scanning calorimetry. Correlation is found between the structural characteristics and electrotransport properties of composite membranes. It is shown that the increase in the macropore volume in the modified fibers enhances the sensitivity of specific conductivity of membranes with respect to the concentration of equilibrium solution and leads to the lower selectivity. © 2013 Pleiades Publishing, Ltd.


Kardash M.M.,Engels State Technological Institute | Kononenko N.A.,Kuban State University | Fomenko M.A.,Kuban State University | Tyurin I.A.,Engels State Technological Institute | Ainetdinov D.V.,Engels State Technological Institute
Petroleum Chemistry | Year: 2016

The effect of fibers selected for investigation on the kinetics of synthesis and curing of the polymer matrix has been revealed; structural features of Polikon K materials formed on polyacrylonitrile, polyester, and novolac phenol–formaldehyde fibers have been studied; and the performance characteristics of the materials have been determined. © 2016, Pleiades Publishing, Ltd.


Kardash M.M.,Engels State Technological Institute | Vol'Fkovich Yu.M.,RAS Frumkin Institute of Physical Chemistry and Electrochemistry | Tyurin I.A.,Engels State Technological Institute | Kononenko N.A.,Kuban State University | And 2 more authors.
Petroleum Chemistry | Year: 2013

The porous structure of Polikon K composite ion-exchange membranes based on polyacrylonitrile fibers has been studied by standard contact porosimetry. Differences in maximum porosity, internal specific surface area, macropore volume, and other structural characteristics attributed to the use of different molding pressures during the preparation of the membranes have been revealed. According to the analysis of the porometric curves measured in octane and water, it has been found that the volume of hydrophobic pores in the Polikon membranes is an order of magnitude lower than the total volume of hydrophilic pores. The ion selectivity of the membrane materials has been estimated from the porometric curves. A comparison of the ion transport numbers measured by the potentiometric method to the calculated values has shown that they are in good agreement. © 2013 Pleiades Publishing, Ltd.

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