| abstract |
The composite semipermeable membrane of the present invention includes a support membrane including a base material and a porous support layer, and a separation functional layer containing crosslinked aromatic polyamide as a main component, wherein sulfo groups in the separation functional layer are 7.0×10 -5 to 5.0×10 -2 g/m 2 , and further, the separation functional layer has a structure represented by Formula 1 above. |