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nature : mean ion exchange membrane surface with physical or chemical means to be modified to deal with it, or ion exchange membrane manufacturing process uses special technology has been the membrane. Such membrane Apart from the original structure and performance, there are some special performance. If the perfluorosulfonic acid membrane, in order to improve its current efficiency, chemical treatment will be modified into its side acid layer, acid ion-exchange membrane formation, or in its side composite membrane layer of acid. Again Asahi, Deshan Cao companies such as ion-exchange membrane to the surface coating, for a price through ion priority, the two trivalent ions through the membrane difficult, thereby realizing the ion exchange membrane concentrated salt water purposes. The main methods are modified compound, surface coatings, surface chemical treatment and coating system in phases. Modification of membrane ion is more difficult through price, anti-pollution and anti-hydrolysis characteristics.
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