Membrane for water filtration
AssigneeAquaporin A/S
InventorsKrzysztof Trzaskus, Reyhan Sengur-Tasdemir
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Abstract
A process for preparing a semi-permeable membrane includes providing an aqueous phase comprising a polyfunctional amine monomer, covering a surface of a porous support membrane with the aqueous phase, applying an organic phase comprising a polyfunctional acyl halide monomer, a phosphorous containing compound and a co-solvent, and allowing the polyfunctional amine monomer and the polyfunctional acyl halide monomer to perform an interfacial polymerization reaction to form a polyamide thin film composite layer. The presence of the co-solvent together with the phosphorous compound in the organic phase potentiates the effect of the phosphorous compound so that the water flux is increased without substantially sacrificing the salt rejection.
Claims20
A process for preparing a semi-permeable membrane, comprising the steps of:
- a. providing an aqueous phase comprising a polyfunctional amine monomer and vesicles comprising aquaporin proteins,
- b. covering a surface of a porous support membrane with the aqueous phase,
- c. applying an organic phase comprising a polyfunctional acyl halide monomer, a phosphorous containing compound and a co-solvent in a non-polar solvent, and
- d. allowing the polyfunctional amine monomer and the polyfunctional acyl halide monomer to perform an interfacial polymerization reaction to form a polyamide thin film composite layer,
- wherein the co-solvent to phosphorous containing compound ratio is within the range from approximately 1:2.5 to approximately 4:1.
Dependencies are inferred from the claim text.