Antifouling and antimicrobial coatings for thin film composite membranes
AssigneeInternational Business Machines Corporation
InventorsYoung-Hye Na, Ran Wang, Andy T. Tek, Joseph Sly
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Abstract
A coated, thin-film composite membrane includes a porous support and a polyamide barrier layer in contact with the porous support. A fouling-resistant and antimicrobial layer of star polymers is in contact with the polyamide barrier layer. The star polymers included hydrophilic arms of about 40 mol % to about 80 mol % of neutral hydrophilic moieties, and about 60 mol % to about 20 mol % of antimicrobial functional groups.
Claims18
A method of forming a layer of self-assembled star polymers on a thin-film composite membrane, the method comprising:
- exposing a surface of a polyamide barrier layer of the thin-film composite membrane to an aqueous solution comprising star polymers with hydrophilic arms comprising about 40 mol % to about 80 mol % of polyethylene glycol (meth)acrylates, and about 60 mol % to about 20 mol % of amino-functional (meth)acrylates;
- and
- draining an excess of the aqueous solution to form an antifouling and antimicrobial coating on the polyamide barrier layer.
A method of forming a layer of self-assembled star polymers on a thin-film composite membrane with a porous support and a polyamide barrier layer in contact with the porous support, the method comprising:
- applying to the polyamide barrier layer an aqueous solution comprising star polymers with hydrophilic arms comprising about 40 mol % to about 80 mol % of polyethylene glycol (meth)acrylates, and about 60 mol % to about 20 mol % of amino-functional (meth)acrylates;
- wherein the star polymers self-assemble to form a coating on the polyamide barrier layer, the coating comprising a single layer of star polymers.
Dependencies are inferred from the claim text.