Block Copolymer Templated Crazing for Membrane Separation
AssigneeThe University of Southern Mississippi
InventorsXiaodan GU, Daniel Weller
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Abstract
A porous composite ultrafiltration membrane including a block copolymer layer having (a) one or more soft block polymer(s) having an elongation at break of greater than about 50%, as measured by ASTM D638 and an elastic modulus of between 10 MPa to 3 GPa as measured by the ASTM D638 tensile test; and (b) one or more hard block polymer(s) having an elongation at break of less than about 65%, as measured by ASTM D638, and an elastic modulus of higher than 1 GPa as measured by the ASTM D638 tensile test, and a macroporous support layer having a pore size larger than a pore size of the block copolymer layer. Also described is a method for making the porous composite membrane.
Claims20
A method of making a porous composite ultrafiltration membrane comprising steps of:
- a) depositing a block copolymer layer onto a macroporous support layer to form a composite membrane, wherein the block copolymer layer comprises:
- one or more soft block polymer(s) having an elongation at break of greater than about 50%, as measured by ASTM D638 and an elastic modulus of between 10 MPa to 3 GPa as measured by the ASTM D638 tensile test;
- and
- one or more hard block polymer(s) having an elongation at break of less than about 65%, as measured by ASTM D638, and an elastic modulus of higher than 1 GPa as measured by the ASTM D638 tensile test, and
- b) applying tensile strain to the composite membrane to form the porous composite ultrafiltration membrane.
Dependencies are inferred from the claim text.