| abstract |
In a semipermeable composite membrane comprising a microporous substrate and an ultra-thin membrane with which the substrate is coated the ultra-thin membrane is composed of a cross-linked aromatic polyamide and the cross-linked aromatic polyamide contains a tri- or higher functional aryl residue having at least two -NH groups. The semipermeable composite membrane has a high solute rejection, high and stable water flux and durability, and is thereby applicable to various fields. |