Anti-fouling coatings with star polymers for filtration membranes

Patent metadata

Field	Value
Publication number	US-10695724-B2
Application number	US-201815899393-A
Country	US
Kind code	B2
Filing date	Feb 20, 2018
Priority date	Feb 16, 2015
Publication date	Jun 30, 2020
Grant date	Jun 30, 2020

Abstract

A porous membrane with a molecular weight cut-off (MWCO) greater than about 10 kDa, and a coating on at least a portion of a major surface of the porous membrane. The coating includes a star polymer having a hydrophobic core and hydrophilic arms, wherein the hydrophobic core contacts the porous membrane.

First claim

The invention claimed is:

1. A porous membrane with a molecular weight cut-off (MWCO) greater than about 10 kDa, and a coating on at least a portion of a surface of the porous membrane, wherein the coating comprises a monolayer of a star polymer, the star polymer comprising:
a hydrophobic core contacting the porous membrane, and
at least six hydrophilic arms attached to the hydrophobic core, wherein the hydrophilic arms comprise (meth)acryl functionality selected from the group consisting of polyethylene glycol methacrylate (PEGMA), dimethylaminoethyl methacrylate (DMAEMA), methacrylic acid (PMAA), a precursor to PMAA, and combinations thereof.

2. The membrane of claim 1 , wherein the core comprises a hydrophobic polymer selected from the group consisting of polyolefins, polystyrene, poly(alkyl-methacrylate), polyacrylamide, polycarbonate and polyester.

3. The membrane of claim 2 , wherein the hydrophobic polymer comprises polystyrene.

4. The membrane of claim 1 , wherein the membrane is a porous ultrafiltration (UF) or microfiltration (MF) membrane.

5. The membrane of claim 4 , wherein the membrane comprises polysulfone (PSF).

6. The membrane of claim 4 , wherein the membrane comprises polyvinylidene fluoride (PVDF).

7. The membrane of claim 1 , wherein the monolayer is self-assembled.

8. The membrane of claim 1 , wherein the polymer arms comprise DMAEMA and PEGMA.

9. A porous filtration membrane with a hydrophobic surface contacting a hydrophilic coating comprising a monolayer of star polymers, wherein the star polymer in the hydrophilic coating comprises the compound of Formula 1:

wherein, in Formula 1, the core comprises a hydrophobic polymer chosen from polyolefins, polystyrene poly(alkyl-methacrylate), polyacrylamide, polycarbonate and polyester; k is greater than or equal to about 6; n is greater than 10; a is greater than n; and X is selected from neutral hydrophilic species, zwitterionic species, charged hydrophilic species, and combinations of thereof.

Assignees

• IBM

Inventors

• Dubois Geraud J
• Miller Robert D
• Na Young-Hye
• Piunova Victoria
• Sly Joseph
• Tek Andy T
• Wang Ran

Classifications

• B01D69/1071 Primary

  Woven, non-woven or net mesh · CPC title

• B01D67/0088

  Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title

• B01D2325/20

  Specific permeability or cut-off range · CPC title

• B01D2325/14

  Membrane materials having negatively charged functional groups · CPC title

• B01D69/02

  characterised by their properties · CPC title