Polymer based permeable membrane for removal of ions
AssigneeThe Johns Hopkins University
InventorGeorge M. Murray
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Abstract
Molecularly imprinted polymer membranes for selectively collecting phosphate, nitrate and ferric ions are disclosed, prepared by copolymerizing a matrix monomer, cross-linking agent, ion imprinting complex, permeability agent and polymerization initiator, after which the ions of the ion imprinting complex are permeability agent are removed. The permeability agent creates channels in the membrane permitting the ion binding sites in the membrane to communicate with the exterior surface of the membrane.
Claims42
A method for making a molecularly imprinted polymer membrane including a selective binding site for phosphate anions, comprising the steps of:
- copolymerizing a polymerization mixture comprising a matrix monomer, a cross-linking agent, a lanthanide-phosphate anion imprinting complex, a permeability agent, and an initiator for said polymerization mixture, so that a polymer membrane is formed;
- and
- removing phosphate anions and said permeability agent from said polymer membrane so that channels and cavities for receiving phosphate anions are formed in said membrane, wherein said cavities are in communication with the exterior surface of said membrane by means of said channels.
A method for making a molecularly imprinted polymer membrane including a selective binding site for nitrate anions, comprising the steps of:
- copolymerizing a polymerization mixture comprising a matrix monomer, a cross-linking agent, a nickel-nitrate anion imprinting complex, a permeability agent, and an initiator for said polymerization mixture, so that a polymer membrane is formed;
- and
- removing nitrate anions and said permeability agent from said polymer membrane so that cavities and channels for receiving nitrate anions are formed in said membrane, wherein said cavities are in communication with the exterior surface of said membrane by means of said channels.
A method for making a molecularly imprinted polymer membrane including a selective binding site for ferric cations, comprising the steps of:
- copolymerizing a polymerization mixture comprising a matrix monomer, a cross-linking agent, a iron (III) tris-vinylbenzoate cation imprinting complex, a permeability agent, and an initiator for said polymerization mixture, so that a polymer membrane is formed;
- and
- removing iron(III) and said permeability agent from said polymer membrane so that cavities and channels for receiving ferric cations are formed in said membrane, wherein said cavities are in communication with the exterior surface of said membrane by means of said channels.
A molecularly imprinted polymer membrane comprising a cross-linked polymer matrix having channels disposed therethrough, and with selective binding sites for phosphate anions on the interior thereof in communication with the exterior surface of said membrane by means of said channels, which thereby increase permeability and direct said phosphate anions to said binding sites.
A molecularly imprinted polymer membrane comprising a cross-linked polymer matrix having channels disposed therethrough and with selective binding sites for nitrate anions on the interior thereof in communication with the exterior surface of said membrane by means of said channels, which thereby increase permeability and direct said nitrate anions to said binding sites.
A molecularly imprinted polymer membrane comprising a cross-linked polymer matrix having channels disposed therethrough and with selective binding sites for ferric cations on the interior thereof in communication with the exterior surface of said membrane by means of said channels, which thereby increase permeability and direct said ferric cations to said binding sites.
Dependencies are inferred from the claim text.