Chlorine resistant desalination membranes based on directly sulfonated poly(arylene ether sulfone) copolymers
AssigneeVirginia Tech Intellectual Properties, Inc.
InventorsJames E. McGrath, Ho Bum Park, Benny D. Freeman
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Abstract
The present invention provides a membrane, kit, and method of making a hydrophilic-hydrophobic random copolymer membrane. The hydrophilic-hydrophobic random copolymer membrane includes a hydrophilic-hydrophobic random copolymer. The hydrophilic-hydrophobic random copolymer includes one or more hydrophilic monomers having a sulfonated polyarylsulfone monomer and a second monomer and one or more hydrophobic monomers having a non-sulfonated third monomer and a fourth monomer. The sulfonated polyarylsulfone monomer introduces a sulfonate into the hydrophilic-hydrophobic random copolymer prior to polymerization.
Claims24
A method of making a hydrophilic-hydrophobic random copolymer water purification membrane comprising the steps of :
- forming a hydrophilic-hydrophobic random copolymer comprising one or more hydrophilic monomers comprising a sulfonated polyarylsulfone monomer and a second monomer and one or more hydrophobic monomers comprising a non-sulfonated third monomer and a fourth monomer, wherein the sulfonated polyarylsulfone monomer introduces a sulfonate into the hydrophilic-hydrophobic random copolymer;
- and
- forming the hydrophilic-hydrophobic random copolymer into a hydrophilic-hydrophobic random copolymer water purification membrane for use in a water purification system,
- wherein the sulfonated polyarylsulfone monomer comprises a disulfonated-diphenylsulfone, the second monomer comprises a biphenol, the non-sulfonated third monomer comprises a 4, 4′-difluoro-triphenyl phosphine oxide, and the fourth monomer comprises a biphenol.
A hydrophilic-hydrophobic random copolymer water purification membrane comprising:
- one or more polymerized hydrophilic regions comprising a sulfonated polyarylsulfone monomer and a second monomer;
- and
- one or more polymerized hydrophobic regions comprising a non-sulfonated third monomer and a fourth monomer, wherein the sulfonated polyarylsulfone monomer introduces a sulfonate into the hydrophilic-hydrophobic random copolymer to form a hydrophilic-hydrophobic random copolymer water purification membrane for use in a water purification system,
- wherein the sulfonated polyarylsulfone monomer comprises a disulfonated-diphenylsulfone, the second monomer comprises a biphenol, the non-sulfonated third monomer comprises a 2,6-dichloro-benzonitrile or a 4,4′-difluoro-triphenyl phosphine oxide, and the fourth monomer comprises a biphenol.
A method of making a chlorine tolerant hydrophilic-hydrophobic copolymer desalination water purification membrane comprising the steps of:
- forming a polymerized hydrophilic-hydrophobic random copolymer comprising one or more hydrophilic monomers comprising a sulfonated polyarylsulfone monomer and a second monomer and one or more hydrophobic monomers comprising a non-sulfonated third monomer and a fourth monomer, wherein the sulfonated polyarylsulfone monomer introduces the sulfonate into the hydrophilic-hydrophobic random copolymer;
- and
- forming the polymerized hydrophilic-hydrophobic random copolymer into a polymerized hydrophilic-hydrophobic copolymer desalination water purification membrane that is chlorine tolerant membrane,
- wherein the sulfonated polyarylsulfone monomer comprises a disulfonated-diphenylsulfone, the second monomer comprises a biphenol, the non-sulfonated third monomer comprises a 2,6-dichloro-benzonitrile or a 4,4′-difluoro-triphenyl phosphine oxide, and the fourth monomer comprises a biphenol.
A hydrophilic-hydrophobic random copolymer desalination water purification membrane comprising a polymer having one or more units having the structure:
- wherein X is an O, Y is a C(CF3) group or a P(O)(C6H5) group, Z is a S(O)2 group, and R is a carbon-carbon single bond.
A chlorine tolerant hydrophilic-hydrophobic copolymer desalination water purification membrane containing units of the following formula:
- wherein X, Y, Z and R independently comprise an O, a S, a C, a F, C(CH3)2 group, a CF3 group, a C(CF3) group, a C(CF3)2 group, a C(CF3)(C6H5) group, a C(O) group, a COO group, a S(O)2 group, or a P(O)(C6H5) group, or a carbon-carbon single bond.
A method of making a hydrophilic-hydrophobic random copolymer water purification membrane comprising the steps of :
- forming a hydrophilic-hydrophobic random copolymer comprising one or more hydrophilic monomers comprising a sulfonated polyarylsulfone monomer and a second monomer and one or more hydrophobic monomers comprising a non-sulfonated third monomer and a fourth monomer, wherein the sulfonated polyarylsulfone monomer introduces a sulfonate into the hydrophilic-hydrophobic random copolymer;
- forming the hydrophilic-hydrophobic random copolymer into a hydrophilic-hydrophobic random copolymer water purification membrane for use in a water purification system;
- and
- adding one or more cross-linking agents to the hydrophilic-hydrophobic random copolymer to form a cross-linked hydrophilic-hydrophobic random copolymer.
Dependencies are inferred from the claim text.