Patent ID: 7695628

Claim:
A method for hemodialysis and hemofiltration, said method comprising contacting blood with a membrane having a pore size between about 0.5 and 100 nm comprising a polyarylethernitrile block copolymer having a contact angle with water of less than about 50° measured on a surface of the copolymer cast as a film on a glass substrate comprising at least one polyarylethernitrile block having structural units of formula I wherein Z is a direct bond, O, S, SO, SO 2 , CO, RPO, alkenyl, alkynyl, a C 1 -C 12 aliphatic radical, a C 3 -C 12 cycloaliphatic radical, a C 3 -C 12 aromatic radical or a combination thereof; R is a C 6-12 aromatic radical or a C 1-12 aliphatic radical; R 1 and R 2 are independently H, halo, nitro, a C 1 -C 12 aliphatic radical, a C 3 -C 12 cycloaliphatic radical, a C 3 -C 12 aromatic radical, or a combination thereof; a is 0, 1, 2 or 3; b is 0, 1, 2, 3 or 4; and m and n are independently 0 or 1.