| 摘要 |
PROBLEM TO BE SOLVED: To provide a reverse osmosis composite membrane with outstandingly high water permeability and high desalting rate and a manufacturing method for the membrane, and further, a spiral reverse osmosis composite membrane element using the reverse osmosis composite membrane, a separation device and a water making method. SOLUTION: A separation functional layer containing a polyamide is formed on a porous support membrane and a hydrophilic protection layer is formed by applying a solution containing 0.05-5 wt.% chemical compound with a hydrophilic group and 0.05-3 wt.% crosslinking agent for crosslinking the chemical compound on the separation functional layer in such a way that the solution is 1 nm-10μm thick. In addition, when the maximum value of an absorption peak within the range of 3,300-3,400 cm-1 measured by the total reflection infrared absorption spectroscopy from the side of the hydrophilic protection layer, is given as RSMAX and the maximum value of an absorption peak within the range of 1,655-1,670 cm-1 measured by the total reflection infrared absorption spectroscopy from the side of the hydrophilic protection layer is given as RAMAX, the value of RSMAX/RAMAX is set within the range of 0.4-5.
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