Patent ID: 8820540

Claim:
A method of preparing a filtration membrane, said method comprising the steps of: (a) providing a porous support; (b) casting a polymer solution onto the porous support to form a coated support; (c) quenching the coated support to form a membrane/support composite; (d) drying the membrane/support composite; and (e) delaminating the membrane/support composite to form an unsupported filtration membrane, wherein the membrane/support composite has a membrane side and a support side and wherein said delaminating step comprises applying a first piece of adhesive tape to the membrane side of the membrane/support composite, applying a second piece of adhesive tape to the support side of the membrane/support composite, and then pulling the first and second pieces of adhesive tapes away from one another to separate the membrane side of the membrane/support composite from the support side of the membrane/support composite.