High flux fluid separation membranes comprising a cellulose or cellulose derivative layer 机翻标题: 暂无翻译,请尝试点击翻译按钮。

公开号/公开日
US2009078640 A1 2009-03-26 [US20090078640]US9010547 B2 2015-04-21 [US9010547] / 2009-03-262015-04-21
申请号/申请日
2008US-12126732 / 2008-05-23
发明人
CHU BENJAMIN;HSIAO BENJAMIN S;MA HONGYANG;
申请人
RESEARCH FOUNDATION OF SUNY;
主分类号
IPC分类号
B01D-067/00B01D-069/02B01D-069/12B01D-071/10B01D-071/12
摘要
(US9010547) The present invention provides membranes having a coating layer comprising cellulose or cellulose derivative and a porous support comprising nanofibers prepared by a process of coating a solution comprising cellulose or a cellulose derivative dissolved in an ionic liquid on to a porous support layer.  The present invention is useful for providing improved water flux and high rejection rates for oil/water emulsions.  The present invention also provides fluid separation systems in UF, NF, RO and FO, incorporating membranes of the present invention.
机翻摘要
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地址
代理人
代理机构
;
优先权号
2007US-60931765 2007-05-26 2007US-60947045 2007-06-29 2008US-12126732 2008-05-23
主权利要求
(US9010547) We claim: 1.  A membrane comprising: (a) a coating layer having a thickness from about 0.1 to about 1 mu m comprising cellulose or a cellulose derivative;   (b) a porous support layer comprising nanofibers having a core-shell structure, the core and shell formed of different polymers;   wherein the membrane is prepared by a process comprising coating a solution comprising cellulose or a cellulose derivative dissolved in an ionic liquid onto the porous support layer, and removing the ionic liquid, thereby forming the coating layer, and   wherein the porous support layer further comprises a plurality of layers each comprising nanofibers, and wherein the average diameter of the nanofibers in the layer contacting the coating layer is less than the average diameter of the nanofibers disposed below the layer contacting the coating layer. 2. The membrane of claim 1, wherein the concentration of the cellulose or a cellulose derivative in the ionic liquid is in the range of about 0.002% (w/w) to 10% (w/w). 3. The membrane of claim 1, wherein the coating layer has a thickness from about 0.3 microns to about 1.0 microns, and wherein the concentration of cellulose or cellulose derivative in the ionic liquid is in the range of from about 0.01% (w/w) to about 2.5% (w/w). 4. The membrane of claim 1, wherein the ionic liquids comprise N-alkylimidazolonium cations having the general formula 1-CnH2n+1-3-methylimidazolonium wherein n is an integer from 1-12. 5. The membrane of claim 4, wherein the anion for the N-alkylimidazolonium cation is selected from the group consisting of halogens, perchlorates, pseudohalogens, and carboxylates. 6. The membrane of claim 5, wherein the anion comprises Cl-, or Br-. 7. The membrane of claim 1, wherein the ionic liquid comprises 1-ethyl-3-methylimidazolium acetate or 1-butyl-3-methylimidazolium chloride. 8. The membrane of claim 1, wherein the porous support layer comprising nanofibers has a thickness of about 50 nm to about 50 mu m. 9. The membrane of claim 1, wherein the porous support has a thickness of about 5 mu m to about 50 mu m. 10. The membrane of claim 1, wherein the average diameter of the nanofibers in the layer contacting the coating layer ranges from about 2 nm to about 100 nm, and the average diameter of the nanofibers disposed below the layer contacting the coating layer ranges from about 100 nm to about 2000 nm. 11. The membrane of claim 1, wherein the coating layer has a thickness in the range of about 0.3 to about 0.5 microns, and the thickness of the porous support layer is in the range of about 20 mu m to about 50 mu m. 12. The membrane of claim 1, wherein the nanofibers comprise a polymer selected from the group consisting of polyolefins, polysulfones, polyethersulfones, fluoropolymers, polyvinylidene fluorides, polyesters, polyamides, polycarbonates, polystyrenes, polyacrylamides, polyacrylates, polyacrylonitriles, poly(meth)acrylates, polyvinyl acetates, polyvinyl alcohols, polysaccharides, chitosan, proteins, polyalkyleneoxides, polyurethanes, polyrureas, polyvinyl chlorides, polyimines, polyvinylpyrrolidones, polyacrylic acids, polymethacrylic acids, polysiloxanes, poly(ester-co-glycol) polymers, poly(ether-co-amide) polymers, cross-linked forms thereof, derivatives thereof, and copolymers thereof. 13. The membrane of claim 12, wherein the membrane is an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane, or a forward osmosis membrane. 14. The membrane of claim 1, wherein the nanofibers comprise polyamide, polyacrylonitrile, polysulfone, polyvinyl alcohol, polyethersulfone, or derivatives thereof. 15. The membrane of claim 1, wherein the porous support further comprises a substrate layer disposed on the surface of the porous support opposite the surface in contact with the cellulose coating. 16. The membrane of claim 15, wherein the substrate layer is either woven or non woven. 17. The membrane of claim 15, wherein the substrate layer comprises poly(ethylene terephthalate). 18. The membrane of claim 1, having a permeation flux for water filtration of about 400 L/m2h to about 700 L/m2h at a pressure of about 15 psi, and wherein the coating layer has a thickness of about 0.3 microns. 19. The membrane of claim 1, wherein the thickness of the coating layer is in the range of about 0.3 micron to about 1.0 micron. 20. The membrane of claim 1, wherein the volume of the core of the nanofibers having the core-shell structure occupies from about 1% to about 90% of the total effective volume of the nanofiber.
法律状态
(US9010547) LEGAL DETAILS FOR US2009078640  Actual or expected expiration date=2030-05-09    Legal state=ALIVE    Status=GRANTED     Event publication date=2008-05-23  Event code=US/APP  Event indicator=Pos  Event type=Examination events  Application details  Application country=US US12126732  Application date=2008-05-23  Standardized application number=2008US-12126732     Event publication date=2009-03-26  Event code=US/A1  Event type=Examination events  Application published  Publication country=US  Publication number=US2009078640  Publication stage Code=A1  Publication date=2009-03-26  Standardized publication number=US20090078640     Event publication date=2009-12-03  Event code=US/AS  Event type=Change of name or address  Event type=Reassignment  Assignment OWNER: THE RESEARCH FOUNDATION OF STATE UNIVERSITY OF NEW  Effective date of the event=2009-11-17  ASSIGNMENT OF ASSIGNORS INTEREST ASSIGNORS:CHU, BENJAMIN HSIAO, BENJAMIN S. MA, HONGYANG REEL/FRAME:023599/0437     Event publication date=2012-10-16  Event code=US/AS  Event type=Change of name or address  Event type=Reassignment  Assignment OWNER: NAVY, SECRETARY OF THE UNITED STATES OF AMERICA, V  Effective date of the event=2009-07-26  CONFIRMATORY LICENSE ASSIGNOR:NEW YORK, UNIVERSITY OF REEL/FRAME:029217/0535     Event publication date=2015-04-21  Event code=US/B2  Event indicator=Pos  Event type=Event indicating In Force  Granted patent as second publication  Publication country=US  Publication number=US9010547  Publication stage Code=B2  Publication date=2015-04-21  Standardized publication number=US9010547     Event publication date=2015-04-21  Event code=US/354  Event indicator=Pos  Event type=Event indicating In Force  Event type=Extension of term of duration of protection  Patent term extension under  35 U.S.C 154(b) until/for:  Number of days of extension=716
专利类型码
A1B2
国别省市代码
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