Structure and Synthesis of Perfluorinated Membranes

Ion-exchange membranes are designed to selectively allow the passage of either cations or anions and are therefore known as cation- or anion-permeable or exchange membranes. 

TABLE 4.8.1 Energy Consumption of Operating Cells (kW hr ton of Chlorine) 

Flemion (perflubrocarboxylate membrane produced by Asahi Glass), and 

Aciplex (bilayered perfluorosulfonate and carboxylate membrane developed by Asahi Chemical (now Asahi Kasei)). 

The first perfluorinated ion-exchange membrane was Nafion perfluoroionomer with sulfonate functionality. It is synthesized [8-12] by reacting tetrafluoroelhylene with SO3 to form a cyclic sulfone. Following rearrangement, it is then reacted with hexafluoropropylene oxide to generate sulfonyl fluoride adducts, with m 1. 

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