Abstract
Abstract A composite membrane for reverse osmosis was prepared from sulfonated polysulfone and poly(vinyl alcohol). The effects of overall polymer solution concentration, composition of casting solution, and heat-curing periods on the reverse osmosis performance of the resulting membrane have been examined. The composite membrane was formed by casting the polymer solution as an ultrathin film on a microporous polysulfone supporter, evaporating the solvent, and heat curing at 120°C for a proper period. The influence of different operating parameters on the performance of the resulting membrane was examined. The results showed that the flux of water increased and salt rejection increased with an increase in the ratio of sulfonated polysulfone to poly(vinyl alcohol) (SPSf/PVA). The flux of water is proportional to the operating pressure of the formed membrane with an SPSf/PVA ratio of 3/3–4/2. The flux of water was found to be a highly nonlinear function of the operating pressure of the formed membrane with ...
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