Evolution of electrochemical characteristics of AMX-Sb membrane after contact of its surfase
Keywords:
electrodialysis, anion exchange membranes, fouling, wine, impedance spectroscopy, voltammetry, contact angles.Abstract
The purpose of this work was to study the evolution of electrochemical characteristics of AMX-Sb membrane after contact of its surface with red wine. The electrochemical and surface properties of AMX-Sb membranes before and after their contact with red wine were studied using electrochemical impedance method, voltammetry, optical control of the surface and determination of hydrophobicity with sessile drop technique. The general result was that short exposure of a studied membrane to wine caused the suppression of generation of H+ and OH- ions on its surface, decrease in its electrical resistance and effective capacitance, and also the decline in its hydrophobicity. The conclusion is that the possible cause of these changes is the adsorption of polyphenolic constituents of wine, anthocyanins, and their derivatives, forming the layers at interface boundary from both membrane and solution sides.
