Polymeric Membrane

1 . A membrane comprising:

a polymeric membrane made from a polymer selected from an aromatic sulfone polymer, polyamide, cellulose, cellulose acetate, polymethylmethacrylate, polyvinylalcohol, and polyacrylnitril, wherein the polymeric membrane has a major surface; and

a stilbenoid, isoflavone or flavone coated on the major surface of the polymeric membrane.

2 . The polymeric membrane of claim 1 , wherein the stilbenoid, isoflavone or flavone covers more than 75% major surface of the polymeric membrane.

3 . The polymeric membrane of claim 1 , wherein the stilbenoid, isoflavone or flavone covers more than 80% major surface of the polymeric membrane.

4 . The polymeric membrane of claim 1 , wherein the polymeric membrane is a hollow fiber membrane comprises an inner surface facing towards its lumen, an outer surface facing outwards and an intermediate wall having a wall thickness, and wherein the major surface is the inner surface.

5 . The polymeric membrane of claim 4 , wherein the intermediate wall comprises a plurality of pores and the stilbenoid, isoflavone or flavone coated on a surface of at least some of plurality of pores.

6 . The polymeric membrane of claim 1 , wherein the aromatic sulfone polymer comprises a polyethersulfone.

7 . The polymeric membrane of claim 1 , wherein the isoflavone comprises a hydroxyisoflavone.

8 . The polymeric membrane of claim 1 , wherein the isoflavone is selected from the group consisting of genistein, daidzein, glycitein, prunetin, biochanin A, orobol, santal, pratensein, formononetin, and glucosides, 13-glycosides, and alkoxy substituted derivatives thereof, and combinations thereof.

9 . The polymeric membrane of claim 1 , wherein the isoflavone is selected from the group consisting of genistein, daidzein, and combinations thereof.

10 . A method, the method comprising:

forming a polymeric membrane from an aromatic sulfone polymer; and

coating a stilbenoid, isoflavone or flavone to the hollow fiber membrane.

11 . The method of claim 10 , wherein the coating step comprises dissolving the stilbenoid, isoflavone or flavone in a solvent to form a coating solution.

12 . The method of claim 11 , wherein the solvent is selected from the group consisting of ethanol and isopropanol.

13 . The method of claim 10 , wherein the coating step comprises immersing the polymeric membrane with the coating solution.

14 . The method of claim 10 , further comprising draining the coating solution from polymeric membrane after the polymeric membrane is immersed with the coating solution.

15 . The method of claim 10 , further comprising drying the polymeric membrane after draining.

16 . The method of claim 10 , wherein the isoflavone is selected from the group consisting of genistein, daidzein, and combinations thereof.

17 . The method of claim 10 , wherein the polymeric membrane is a hollow fiber membrane having lumens.

18 . The method of claim 17 , draining the coating solution comprises draining the coating solution from of the hollow fiber membrane after the lumens of the hollow fiber membrane are filled with the coating solution.

19 . The method of claim 10 , wherein the coating step comprises flowing the coating solution into lumens of the polymeric membrane.

20 . A use of the polymeric membrane of claim 1 for filtration of liquids.