Polysulfone-supported separation membrane
AssigneeKing Fahd University of Petroleum and Minerals
InventorIsam Hassan Aljundi
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Abstract
A multi-layer membrane which has a mixed polyamide selective layer supported on a porous polysulfone layer. The mixed polyamide selective layer includes reacted units of a polyfunctional acyl halide (e.g. trimesoyl chloride) and a diamine mixture containing 4,7,10-trioxa-1,13-tridecanediamine and a cyclic diamine (e.g. piperazine). Methods of fabricating the multi-layer membrane via techniques such as phase inversion and interfacial polymerization are described. The inventive membrane is evaluated on its water flux and salt rejection (e.g. sulfate and chloride salts) capabilities. A water desalination system containing the multi-layer membrane(s) is also provided.
Claims11
A polysulfone-supported separation membrane, comprising:
- a porous support layer comprising a polysulfone and polyvinylpyrrolidone, wherein the support layer has a thickness of 50-800 μm;
- a selective layer consisting of a polyamide and having a thickness of 0.1 μm to 0.5 μm,
- wherein the polyamide comprises as reacted units a polyfunctional acyl halide having at least two acyl halide groups, 4,7,10-trioxa-1,13-tridecanediamine and a cyclic diamine of formula (I)
- wherein:
- R1, R2, R3, and R4 are each independently selected from the group consisting of a hydrogen, an optionally substituted alkyl, an optionally substituted cycloalkyl, an optionally substituted arylalkyl, and an optionally substituted aryl;
- m and n are each independently 2 or 3;
- a weight ratio of the 4,7,10-trioxa-1,13-tridecanediamine to the cyclic diamine (I) in the polyamide is in a range of 1:5 to 2:1;
- and
- the selective layer is disposed on at least a portion of a surface of the porous support layer.
Dependencies are inferred from the claim text.