Membrane-based apparatus and associated method

• US 20070131610A1
• Filed: 05/15/2006
• Published: 06/14/2007
• Est. Priority Date: 12/13/2005
• Status: Abandoned Application

• Current Assignee: Momentive Performance Materials Incorporated (Momentive Performance Materials Holdings LLC)
• Original Assignee: General Electric Company
• Inventors: Cao, Chun, Wang, Dong, Peng, Wenqing, Rajaraman, Suresh, Xia, Zijun, Leatherman, Mark, Policello, George
• Application Number:
  US11/433,984
• Publication Number:
  US 20070131610A1
• Time in Patent Office: Days
• US Class Current: 210/500.270
• CPC Class Codes: B01D 2323/02 Hydrophilization
• CPC Class Codes: B01D 67/0088 Physical treatment with compounds, e.g. swelling, coating or impregnation
• CPC Class Codes: B01D 69/02 characterised by their properties
• CPC Class Codes: B01D 71/36 Polytetrafluoroethene
• CPC Class Codes: C02F 1/44 by dialysis, osmosis or reverse osmosis general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268
• CPC Class Codes: C02F 1/441 by reverse osmosis
• CPC Class Codes: C02F 1/442 by nanofiltration
• CPC Class Codes: C02F 1/444 by ultrafiltration or microfiltration
• CPC Class Codes: C02F 2103/08 Seawater, e.g. for desalination
• CPC Class Codes: C08L 2666/44 Silicon-containing compounds
• CPC Class Codes: C09D 163/00 Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
• CPC Class Codes: Y02A 20/131 Reverse-osmosis
• CPC Class Codes: Y10T 428/249953 Composite having voids in a component [e.g., porous, cellular, etc.]
• CPC Class Codes: Y10T 428/249954 With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component

Abstract

A system may include an article, and the article may include a membrane having pores and a surfactant in contact with the membrane. The surfactant may function as a super-spreader when in solution. The article may wet out the pores in response to contact with a fluid.

Claims

1. An apparatus comprising an article, wherein the article comprises:

a membrane having pores extending from a first surface through the membrane to a second surface; and

a surfactant in contact with a surface of the membrane, and the surfactant is capable of functioning as a super spreader when in contact with a solution, and the article is capable of wetting at least one of the surfaces in response to contact with a fluid.

2. An ion-exchange filter comprising the apparatus as defined in claim 1 and an ionomer layer in ionic communication with the membrane.

3. The ion-exchange filter as defined in claim 2, wherein the ionomer layer comprises an ion-exchange material.

4. The ion-exchange filter as defined in claim 3, wherein the membrane comprises one or more material selected from the group consisting of fluorinated olefins, chlorinated olefins, brominated olefins, iodinated olefins, perfluoroalkylvinyl ethers, and polyperfluoro-oxyaklyl ether.

5. The ion-exchange filter as defined in claim 3, wherein the ion-exchange material comprises one or more moiety selected from the group consisting of carboxylic acid groups, sulfonic acid groups, sulfuric acid groups, sulfinic acid groups, phosphonic acid groups, and boronic acid groups.

6. An electrochemical cell comprising the apparatus as defined in claim 1, an electrode, and an electrolyte in ionic communication with the apparatus and with the electrode.

7. A fuel cell comprising the electrochemical cell as defined in claim 6, wherein the fuel cell is operable to generate electrical energy by a reaction between a fuel and an oxidant directly and continuously.

8. A medical device comprising the apparatus as defined in claim 1, wherein at least one of the surfaces is biocompatible when contacted with at least one of tissue, cell, or biologic fluid.

9. The medical device as defined in claim 8, wherein the membrane further comprises a bioactive material.

10. The medical device as defined in claim 9, wherein the bioactive material comprises one or more material selected from the group consisting of an anticoagulant agent, an antithrombotic agent, a clotting agent, a platelet agent, an anti-inflammatory agent, an antibody, an antigen, an immunoglobulin, a defense agent, an enzyme, a hormone, a growth factor, a neurotransmitter, a cytokine, a regulatory agent, a transport agent, a fibrous agent, a viral agent, a protein, a structural protein, a membrane protein, a cell attachment protein, a viral protein, a peptide, a toxin, an antibiotic agent, an antibacterial agent, an antimicrobial agent, a saccharide, a carbohydrate, a fatty acid, a catalyst, a drug, a vitamin, a DNA segment, a RNA segment, a nucleic acid, a lectin, a ligand, and a dye.

11. The medical device as defined in claim 8, wherein the membrane is rendered transparent or translucent when contacted with the biologic fluid to one or both of ultrasound or optical imaging.

12. The medical device as defined in claim 8, wherein the membrane is visible by one or both of ultrasound or optical imaging.

13. The medical device as defined in claim 12, wherein the apparatus further comprises a visualisation enhancer.

14. The medical device as defined in claim 13, wherein the visualisation enhancer comprises one or more of a biomarker, a contrast agent, an imaging agent, or a diagnostic agent.

15. A medical device comprising the apparatus as defined in claim 1, wherein the medical device is one or more of an extracorporeal surgical device, an endoprostheses implant, an intravascular device, a bioanalytical device, a microfluidic device, a drug delivery device, or a tissue engineering scaffold.

16. A separator comprising the apparatus as defined in claim 1, wherein the pores provide fluidic communication from the first surface to the second surface, and the fluid comprises a plurality of at least two components, and one component can pass through the membrane, while another component can not pass through the membrane.

17. A water treatment apparatus, comprising:

a membrane having pores extending from a first surface through the membrane to a second surface, and a surfactant disposed on at least one surface of the membrane, and the surfactant is capable of functioning as a super spreader when in solution so that the pores respond to contact with the solution and to allow a fluid component of the solution to flow therethrough, and

a flow-inducing mechanism operable to flow the solution containing a chemical species to the membrane, wherein the membrane is capable of filtering the solution to separate the chemical species from the fluid.

18. The water treatment apparatus as defined in claim 17, wherein the membrane is one or more of a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, or a reverse osmosis membrane.

19. The water treatment apparatus as defined in claim 17, wherein the fluid is water and the chemical species is a salt.

20. A desalination apparatus comprising the water treatment apparatus as defined in claim 19, and that is capable of reducing a salt concentration in the fluid initially containing the salt dissolved therein.

21. A method, comprising:

providing an article, wherein the article comprises a membrane having pores extending therethrough, and a surfactant in contact with at least one surface of the membrane, and the surfactant is capable of functioning as a superspreader when in solution; and

performing one or more of;

decreasing the electrical resistance of an ion exchange membrane comprising the article,

separating components of a solution having a plurality of components, and one of the components can pass through the article, while another of the components can not pass through the article,

disposing the article as an intervening layer between a relatively non-biocompatible material and one or more of a tissue, a cell, or a biologic fluid, or

wetting the pores of the membrane with a biologic fluid to enhance visualization of a medical device to one or both of ultrasound imaging or to optical imaging.