HIGH-PERFORMANCE ANION EXCHANGE MEMBRANES AND METHODS OF MAKING SAME

Anion exchange membranes may include a polymeric microporous substrate and a cross-linked anion exchange polymeric layer on the substrate. Anion exchange membranes may have a resistivity of less than about 1.5 Ohm-cmand an apparent permselectivity of at least about 95%. The anion exchange membranes may be produced by a unique, two step process. 1. A method of making an anion exchange membrane , comprising:mixing a tertiary amine monomer with a quaternization agent to produce a functional monomer;mixing a cross-linking agent and a solvent with the functional monomer to form a monomeric solution; andcasting the monomeric solution on a polymeric microporous substrate to form the anion exchange membrane.2. The method of claim 1 , wherein the tertiary amine monomer is selected from the group consisting of 1-vinylimidazole claim 1 , 2-methyl-1-vinylimidazole claim 1 , 9-vinylcarbazole claim 1 , N-ethyl-2-vinylcarbazole claim 1 , 2-vinylpyridine claim 1 , 3-vinylpyridine claim 1 , 4-vinylpyridine claim 1 , and mixtures thereof.3. The method of claim 2 , wherein the quaternization agent is selected from the group consisting of benzyl chloride claim 2 , benzyl bromide claim 2 , benzyl iodide claim 2 , p-dichlorobenzene claim 2 , m-dichlorobenzene claim 2 , 1 claim 2 ,4-dichloro-2-nitrobenzene claim 2 , 3-(Benzyloxy)benzyl chloride claim 2 , 4-(Benzyloxy)benzyl chloride 2-(Trifluoromethyl)- benzyl chloride claim 2 , 3-(Trifluoromethyl)benzyl chloride claim 2 , 4-(Trifluoromethyl)benzyl chloride claim 2 , 1-chlorohexane claim 2 , 1-chloropentane claim 2 , 1-chlorobutane claim 2 , 1-chloropropane claim 2 , 1 claim 2 ,6 dichlorohexane claim 2 , 1 claim 2 ,5-dichloropentane claim 2 , 1 claim 2 ,4-dichlorobutane claim 2 , 1 claim 2 ,3-dichloropropane claim 2 , 1-bromohexane claim 2 , 1-bromopentane claim 2 , 1-bromobutane claim 2 , 1-bromopropane claim 2 , 1 claim 2 ,6-dibromohexane claim 2 , 1 claim 2 ,5-dibromopentane claim 2 , 1 claim 2 ,4-dibromobutane claim 2 , 1 claim 2 ,3- ...

Anion exchange membrane for electrodialysis comprising a microporous membrane support and a crosslinked polymer that is a polymerization product of a monomer comprising a tertiary amine, a crosslinking monomer, a quaternizing agent and a polymerization initiator; and its production process.