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US 7,582,683 B2Granted
Anion-conducting polymer, composition, and membrane
AssigneeLos Alamos National Security, LLC
InventorsBryan S. Pivovar, David L. Thorn
Life of this patent
Estimating the term…
Abstract
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.
Claims3
A polymer of the formula
- wherein n is an integer of 3 or greater;
- wherein Z is a direct bond or a chemical group independently selected from —O—, —S—, —SO2—, —C(CH3)2—, —C(CF3)2—, —C(═O)—, —P(═O)(aryl)-, phenyl;
- wherein R1 and R2 independently of one another denote H, 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 R1 and R2 together may form a —(CH2)2—, —(CH2)3—, —(CH2)4—, —(CH2)5—, —CH═CH—, or —CH═CH—CH═CH—;
- and wherein A1 and A2 are selected from hydrogen, alkyl, cycloalkyl, alkenyl, aryl, aralkyl group having 1 to 10 carbon atoms, a heterocyclic group having 4 to 20 carbon atoms, and a residue selected from those of the formula
- wherein R3 is a direct bond or a group selected from —(CH2CH2)—, —(C6H4)—, (CF2CF2)—, —(CH2CH2CH2)—;
- wherein R4 and R5 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 R4 and R5 may together form a —(CH2)2—, —(CH2)3—, —(CH2)4—, —(CH2)5—, —CH═CH—, or —CH═CH—CH═CH—;
- wherein R6 is selected from H, alkyl or cycloalkyl;
- wherein Q is any anion;
- and with the caveat that the polymer comprises at least 1 weight percent of the residue.
8 more elements
An anion-conducting membrane comprising a polymer of the formula
- wherein n is an integer of 3 or greater;
- wherein Z is a direct bond or a chemical group independently selected from —O—, —S—, —SO2—, —C(CH3)2—, —C(CF3)2—, —C(═O)—, —P(═O)(aryl)-, phenyl;
- wherein R1 and R2 independently of one another denote H, 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 R1 and R2 together may form a —(CH2)2—, —(CH2)3—, —(CH2)4—, —(CH2)5—, —CH═CH—, or —CH═CH—CH═CH—;
- and wherein A1 and A2 are selected from hydrogen, alkyl, cycloalkyl, alkenyl, aryl, aralkyl group having 1 to 10 carbon atoms, a heterocyclic group having 4 to 20 carbon atoms, and a residue selected from those of the formula
- wherein R3 is a direct bond or a group selected from —(CH2CH2)—, —(C6H4)—, —(CF2CF2)—, —(CH2CH2CH2)—;
- wherein R4 and R5 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 R4 and R5 may together form a —(CH2)2—, —(CH2)3—, —(CH2)4—, —(CH2)5—, —CH═CH—, or —CH═CH—CH═CH—;
- wherein R6 is selected from H, alkyl or cycloalkyl;
- wherein Q is any anion;
- and with the caveat that the polymer comprises at least 1 weight percent of the residue.
8 more elements
Dependencies are inferred from the claim text.