WATER AND ION TRANSPORT THROUGH SULFONATED STYRENIC PENTABLOCK COPOLYMER MEMBRANES FOR REVERSE OSMOSIS APPLICATIONS

摘要

Membrane-based desalination technologies such as reverse osmosis are becoming more widely used as global water shortage increases. There is a need to develop improved membrane materials for use in reverse osmosis. One such membrane, a sulfonated pentablock copolymer is evaluated here for its water and salt transport properties. The effects of block molecular weight, sulfonation fraction, and solution-casting technique have been studied in terms of pure water and sodium chloride permeability.