Selective membrane having a high fouling resistance
AssigneeWoongjin Chemical Co., Ltd.
InventorsJa-Young Koo, Sung Pyo Hong, Jong Hwa Lee, Kwan Young Ryu
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Abstract
A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane in which a hydrophilic coating is applied to the polyamide layer of the membrane, the hydrophilic coating being made by covalently bonding a hydrophilic compound to residual acid chlorides of the polyamide membrane, the hydrophilic compound including (i) at least one reactive group that is adapted to covalently bond directly to the polyamide membrane, the at least one reactive group being at least one of a primary amine and a secondary amine; and (ii) at least one non-terminal hydroxyl group.
Claims23
A composite polyamide reverse osmosis membrane, said composite polyamide reverse osmosis membrane comprising:
- (a) a microporous support;
- (b) a polyamide layer on said microporous support;
- and
- (c) a hydrophilic coating on said polyamide layer, said hydrophilic coating being formed by covalently bonding a hydrophilic compound to the polyamide membrane, wherein said hydrophilic compound includes (i) at least one reactive group adapted to covalently bond directly to the polyamide membrane, said at least one reactive group being at least one of a primary amine and a secondary amine;
- and (ii) at least one non-terminal hydroxyl group.
Dependencies are inferred from the claim text.