| 主权项 |
1. A hollow-fiber membrane, comprising:
a copolymer comprising sulfone structural units having a formula (I) and zwitterion-functionalized structural units having a formula (II): wherein “a” and “b” are independently at each occurrence 0, 1, 2, 3, or 4; “n” and “p” are independently 0 or 1; “k” is in a range from 0 to 10; R1 and R2 are independently at each occurrence a hydrogen atom, a halogen atom, a nitro group, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; R3 and R5 are independently a hydrogen atom, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; R4 is a bond, a C1-C12 aliphatic radical, a C3-C12 cycloaliphatic radical, or a C3-C12 aromatic radical; and wherein a mole fraction of the zwitterion-functionalized structural units in the copolymer is less than about 50 mole percent. |
