| 摘要 |
This composite semipermeable membrane provided with a substrate, a porous supporting layer formed on the substrate, and a separation functional layer formed on the porous supporting layer, wherein the separation functional layer has a crosslinked wholly aromatic polyamide as the main component and contains a carboxy group. Of the functional groups contained in the separation functional layer, the ratio (molar equivalent of carboxy groups) / (molar equivalent of amide groups) is 0.40 or greater, and the average of oxygen atom/nitrogen atom ratios on the front and back of the separation functional layer is 0.95 or less. |
