Electrical conductance of ion-exchange textiles equilibrated with sodium chloride solutions

摘要

The aim of the work presented here is to develop a method for measuring the electric resistance of ion-exchange textiles which is a parameter unknown up to now. A special cell has been elaborated and conductimetry and impedance spectroscopy methods were compared at various NaCl concentrations. Different kinds of ion-exchange textiles were tested. A significant decrease in the electric resistance was obtained with a bipolar textile (85%) and an amphoteric textile (75%), at NaCl concentration of 6 mg l(-1). The results were analysed taking into account the two phases gel model used for ion-exchange membranes. The NaCl concentration corresponding to the isoconductance point could be determined and showed that textiles improve the solution conductivity at concentrations lower than 100 mg l(-1). (C) 1998 Elsevier Science B.V. [References: 17]