Synthetic membranes and methods of use thereof

Patent metadata

Field	Value
Publication number	US-11065585-B2
Application number	US-202016941772-A
Country	US
Kind code	B2
Filing date	Jul 29, 2020
Priority date	Nov 14, 2014
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

The present invention relates to synthetic membranes and use of these synthetic membranes for isolation of volatile organic compounds and purification of water. The synthetic membrane includes a hydrophobic polymer layer located on a polymeric membrane support layer. The invention includes a method of isolating volatile organic compounds with the synthetic membrane by contacting a volatile organic mixture with the hydrophobic polymer layer of the synthetic membrane and removing volatile organic compounds from the polymeric membrane support layer of the synthetic membrane by a process of pervaporation. The invention also includes a method of purifying water with the synthetic membrane by contacting an ionic solution with the hydrophobic polymer layer of the synthetic membrane and removing water from the polymeric membrane support layer of the synthetic membrane by a process of reverse osmosis. The invention also relates to methods of isolating non-polar gases by gas fractionation.

First claim

What is claimed is:

1. A method of making a synthetic membrane for recovering a target via separation, the method comprising:
providing a skin support layer including polysulfone, cellulose, cellulose acetate, polyvinylidene fluoride, polyimide, polyethylene, polypropylene, polyacrylonitrile, polyethylene terephthalate, or combinations thereof;
providing a light-sensitive poly(ether sulfone) membrane support layer to the skin support layer;
irradiating a surface of the light-sensitive poly(ether sulfone) membrane support layer; and
contacting a monomer solution with the surface of the light-sensitive membrane support layer, the monomer solution comprising vinyl monomers and a solvent.

2. The method according to claim 1 , wherein the vinyl monomers are C 1-20 alkyl methacrylate monomers, polyethylene glycol monomers, styrene monomers, or combinations thereof.

3. The method according to claim 2 , wherein the vinyl monomers are C 18 alkyl methacrylate monomers.

4. The method according to claim 2 , wherein the vinyl monomers are C 6 alkyl methacrylate monomers.

5. The method according to claim 1 , wherein a molar concentration of the vinyl monomers in the monomer solution is from about 0.01 M to about 9.0 M.

6. The method according to claim 1 , wherein irradiating the surface of the light-sensitive poly(ether sulfone) membrane support layer includes:
exposing the surface of the light-sensitive poly(ether sulfone) membrane support layer to atmospheric pressure plasma for a time period of from about 2 minutes to about 10 minutes.

7. The method according to claim 1 , wherein irradiating the surface of the light-sensitive poly(ether sulfone) membrane support layer includes:
exposing the surface of the light-sensitive poly(ether sulfone) membrane support layer to ultraviolet light for a time period of from about 10 seconds to about 5 minutes.

Assignees

• Rensselaer Polytech Inst

Inventors

• Belfort Georges
• Grimaldi Joseph
• Imbrogno Joseph
• Kilduff James
• Keating John Joseph

Classifications

• B01D71/521

  Aliphatic polyethers · CPC title

• B01D2325/02832

  1-10 nm · CPC title

• B01D69/107

  Organic support material · CPC title

• B01D2323/08

  Specific temperatures applied · CPC title

• B01D71/40

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