REVERSE OSMOSIS MEMBRANE FOR SALINE WATER CONVERSION

摘要

PROBLEM TO BE SOLVED: To provide a reverse osmosis membrane that combines salt removal and water permeability requested in saline water conversion at a high level while using a material that has chemical resistance (alkali resistance and chlorine resistance).SOLUTION: A reverse osmosis membrane comprises a specific sulfonation polyarylene ether sulfone polymer, and the reverse osmosis membrane for saline water conversion is characterized in that in a proton nuclear magnetic resonance spectrum to measure a water molecule in a membrane by using the reverse osmosis membrane of a moisture state, a relation of a chemical shift A (ppm) of a spectrum top peak of a bound water origin and a chemical shift B (ppm) of a spectrum top peak of a bulk water origin satisfies B-0.79≤A