Method Of Producing A Polymeric Membrane

A method for producing a polymeric membrane comprising the steps of:

• (a) dissolving at least one amphiphillic block copolymer in a solvent to form a casting solution of the block copolymer,
• (b) extruding the casting solution onto a carrier substrate to form a film,
• (c) evaporating a portion of the solvent near the surface during a standing period,
• (d) contacting the extruded solution with non-solvent to induce phase separation and thereby producing an integral asymmetric polymeric membrane in flat sheet geometry, and
• (e) crosslinking the integral asymmetric polymeric membrane by application of heat or radiation thereby producing a membrane having a homogeneous porosity throughout the entire polymeric phase,
• wherein the amphiphillic block copolymer is a amphiphillic block copolymer is an amphiphillic diblock copolymer, containing blocks of a polar copolymer and blocks of a benzocyclobutene copolymer.