Modified membrane
AssigneeDow Global Technologies LLC
InventorsWilliam E. Mickols, Richard C. Krauss, Q. Jason Niu, Carleton L Gaupp
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Abstract
A multilayered modified membrane and method for making the same, comprising a modified discriminating layer that can have a fouling resistant surface, improved salt rejection, antimicrobial properties, and/or improved solute, and/or small organics rejection as compared to membranes with unmodified discriminating layers.
Claims13
A method for modifying a polyamide discriminating layer of a membrane by applying a modifying composition to at least a surface portion of the discriminating layer, wherein the method is characterized by the modifying composition comprising a phenyl amine compound including at least one pendent functional group selected from:
- thiols and acetyls.
A composite membrane comprising a porous support and a polyamide discriminating layer having an inner side and outer side, the inner side of the discriminating layer in contact with the porous support, and
- wherein the membrane is characterized by the polyamide discriminating layer having a relatively higher concentration of moieties derived from phenyl amine compounds including at least one pendent functional group selected from:
- thiols and acetyls, in a region near the outer side of the discriminating layer as compared with a region near the inner side.
Dependencies are inferred from the claim text.