Anion-conducting polymer, composition, and membrane
View Patent ↗Anion-conducing polymers and membranes with enhanced stability to aqueous alkali include a polymer backbone with attached sulfonium, phosphazenium, phosphazene, and guanidinium residues. Compositions also with enhanced stability to aqueous alkali include a support embedded with sulfonium, phosphazenium, and guanidinium salts.
1. A composition comprising a support and a salt embedded in the support, the salt being selected from the group consisting of salts of the formula
wherein R 4 and R 5 independently of one another denote an alkyl, cycloalkyl, alkenyl, aryl, or aralkyl group having 1 to 10 carbon atoms or a heterocyclic group having 4 to 20 carbon atoms; wherein R 4 and R 5 may together form a
—(CH 2 ) 2 —, —(CH 2 ) 3 —, —(CH 2 ) 4 —, —(CH 2 ) 5 —, —CH═CH—, or —CH═CH—CH═CH—; wherein R 6 is selected from H, alkyl, cycloalkyl; and wherein Q is any anion.
2. The composition of claim 1 , wherein the support comprises asbestos, ceramic, an organic polymer, or mixtures thereof.