Antifouling and antimicrobial coatings for thin film composite membranes

Patent metadata

Field	Value
Publication number	US-10086338-B2
Application number	US-201514788405-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Jun 30, 2015
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

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.

First claim

The invention claimed is:

1. A coated, thin-film composite membrane, comprising:
a porous support;
a polyamide barrier layer in contact with the porous support; and
a fouling-resistant and antimicrobial layer of star polymers in contact with the polyamide barrier layer, wherein the star polymers comprise hydrophilic arms, the hydrophilic arms comprising:
(i) about 40 mol % to about 80 mol % of neutral hydrophilic moieties, and
(ii) about 60 mol % to about 20 mol % of antimicrobial functional groups.

2. The membrane of claim 1 , wherein the hydrophilic arms of the star polymers comprise:
(i) about 45 mol % to about 73 mol % of polyethylene glycol moieties, and
(ii) about 55 mol % to about 27 mol % of at least one of amine-functionalized moieties and ammonium moieties.

3. The membrane of claim 1 , wherein the hydrophilic arms of the star polymers comprise (i) polyethylene glycol (meth)acrylates and (ii) amino-functional (meth)acrylates.

4. The membrane of claim 3 , wherein the hydrophilic arms of the star polymers comprise: (i) polyethylene glycol methacrylate (PEGMA) and (ii) dimethylaminoethyl methacrylate (DMAEMA).

5. The membrane of claim 1 , wherein the star polymers comprise a hydrophobic core.

6. The membrane of claim 5 , wherein the hydrophobic core comprises polystyrene.

7. The membrane of claim 1 , wherein the porous support comprises polysulfone (PSF).

8. The membrane of claim 1 , wherein the fouling-resistant and antimicrobial layer of star polymers comprises a single layer of star polymers.

9. The membrane of claim 8 , wherein the single layer is self-assembled.

10. A thin film composite filtration membrane comprising a polyamide barrier layer on a porous support, and a coating on a surface of the polyamide barrier layer, wherein the coating comprises a hydrophobic microgel core and at least 6 hydrophilic polymer arms comprising (i) about 40 mol % to about 80 mol % of polyethylene glycol (meth)acrylates (ii) and about 60 mol % to about 20 mol % of amino-functional (meth)acrylates.

11. The membrane of claim 10 , wherein the polymer arms comprise about 45 mol % to about 73 mol % of the polyethylene glycol (meth)acrylates, and about 55 mol % to about 27 mol % of the amino-functional (meth)acrylates.

12. The membrane of claim 11 , wherein the polyethylene glycol (meth)acrylates comprise polyethylene glycol methacrylate (PEGMA), and wherein the amino-functional (meth)acrylates comprise dimethylaminoethyl methacrylate (DMAEMA).

13. The membrane of claim 10 , wherein the star polymer comprises the compound below:

wherein k is an integer greater than or equal to about 6; n is an integer greater than 10; m is an integer greater than 1, and x is about 0.2 to about 0.6.

Assignees

• IBM

Inventors

• Na Young-Hye
• Sly Joseph
• Tek Andy T
• Wang Ran

Classifications

• B01D2325/48

  Antimicrobial properties · CPC title

• B01D69/12

  Composite membranes; Ultra-thin membranes · CPC title

• B01D71/40

  Polymers of unsaturated acids or derivatives thereof, e.g. salts, amides, imides, nitriles, anhydrides, esters · CPC title

• B01D2323/00

  Details relating to membrane preparation · CPC title

• B01D71/06

  Organic material · CPC title