Abstract
The preparation of polystyrene-based titanium phosphate membranes at different pressures with varying amounts of material has been explained. The membrane potentials of inorganic membranes were measured with uni-univalent electrolytes (KCl, NaCl and LiCl) solution using saturated calomel electrodes (SCEs). The TMS method was used for the evaluation of the effective fixed charge density of these membranes with increasing pressure, and the surface charge density of membrane appeared to be increased due to gradually diminution in surface opening channels. The order of surface charge density for electrolytes used is found to be KCl > NaCl > LiCl. In addition to the effective fixed charge density, distribution coefficient, transport numbers, charge effectiveness and other related parameters were calculated for characterizing the ion exchange membranes by utilizing the TMS method. The theoretical prediction is consistent well with the experimental data. The SEM of these membranes at various pressures has been presented.
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