| 摘要 |
<p>The present invention provides a composite reverse osmosis membrane as a polyamide membrane including a side chain amino group such as a residue of a polyvinyl alcohol-based amine compound represented by Formula 1. Such a membrane can remove organic impurities under a low pressure, providing an economical method for removal of impurities. An aqueous solution including a polyvinyl alcohol-based amine compound having a side chain amino group represented by Formula 1 is applied on a polysulfone-based ultrafiltration membrane as a microporous support. Next, trimesic acid chloride solution is applied causing interfacial polycondensation, which generates a reverse osmosis membrane. When this composite reverse osmosis membrane is evaluated by using a pH 6.5 aqueous solution including 500mg/l of sodium chloride at an operation pressure of 5kg/cm<2> and at a temperature of 25 DEG C, the permeable flux is at least 1.5m<3>/m<2>.d, and the salt rejection is 80% or less. <CHEM> wherein 0<a, 0</=b, 2<c, 1</=x</=5, 0</=y</=4; R<1> is at least one group selected from the group consisting of an ether group, an alkylene group and an ester group; and R<2> is at least one group selected from the group consisting of an alkyl group and a halogen group.</p> |
