Class / Patent application number | Description | Number of patent applications / Date published |
210500280 | Cyclic | 80 |
20100133171 | Polybenzoxazole Polymer-Based Mixed Matrix Membranes - The present invention discloses new types of polybenzoxazole-based mixed matrix membranes and methods for making and using these membranes. The polybenzoxazole-based mixed matrix membranes are prepared by fabricating a polyimide-based mixed matrix membrane by dispersing molecular sieve particles in a continuous aromatic polyimide matrix with pendent hydroxyl groups ortho to the heterocyclic imide nitrogen; and then converting the polyimide-based mixed matrix membrane to a polybenzoxazole-based mixed matrix membrane by heating between 300° and 600° C. under inert atmosphere or vacuum. The polybenzoxazole-based mixed matrix membranes of the present invention can be fabricated into any convenient geometry such as flat sheet (or spiral wound), tube, hollow fiber, or thin film composite. These polybenzoxazole-based mixed matrix membranes exhibit high thermal stability, significantly higher selectivity than the neat polybenzoxazole polymer membranes, and much higher permeability than traditional mixed matrix membranes. | 06-03-2010 |
20110155660 | MODIFIED MEMBRANE - A multilayered modified membrane and method for making the same, comprising a modified discriminating layer that can have a fouling resistant surface, improved salt rejection, antimicrobial properties, and/or improved solute, and/or small organics rejection as compared to membranes with unmodified discriminating layers. | 06-30-2011 |
20110259817 | COMPOSITE MEMBRANE INCLUDING COATING OF POLYALKYLENE OXIDE AND TRIAZINE COMPOUNDS - Composite membranes including a coating of polyalkylene oxide and triazine compounds along with various methods for making and using the same. In one embodiment, the composite membrane comprises a thin film polyamide layer including a coating of a reaction product of a polyalkylene oxide compound and a triazine compound. | 10-27-2011 |
20120024778 | COMPOSITE SEMIPERMEABLE MEMBRANE AND METHOD FOR PRODUCING THE SAME - Disclosed herein are a composite semipermerable membrane and a method for producing the same. The composite semipermeable membrane comprises a microporous support membrane and a separation functional layer provided on the microporous support membrane, wherein the separation functional layer contains a condensation product produced by condensation of at least one selected from the group consisting of ions of trialkoxysilanes each having an imidazolium group and a conjugated base of a polymer having at least one acidic group. The composite semipermeable membrane achieves excellent selective separation of divalent ions over monovalent ions, and is suitable for use in various water treatment fields such as seawater desalination and drinking water production. | 02-02-2012 |
20120193285 | METHOD FOR PRODUCING RESIN POROUS MEMBRANE WITH ADHESIVE LAYER, RESIN POROUS MEMBRANE WITH ADHESIVE LAYER, AND FILTER MEMBER - The present invention provides a resin porous membrane with an adhesive layer that exhibits excellent bonding precision and can be bonded to an adherend while maintaining the gas permeability of the porous membrane even when the porous membrane is small, and a method for producing the resin porous membrane with the adhesive layer. The present invention also provides the filter member including the resin porous membrane with the adhesive layer. | 08-02-2012 |
20120248031 | Composites and Composite Membranes - The invention relates to a composite or a composite membrane consisting of an ionomer and of an inorganic optionally functionalized phyllosilicate. The isomer can be: (a) a cation exchange polymer; (b) an anion exchange polymer; (c) a polymer containing both anion exchanger groupings as well as cation exchanger groupings on the polymer chain; or (d) a blend consisting of (a) and (b), whereby the mixture ratio can range from 100% (a) to 100% (b). The blend can be ionically and even covalently cross-linked. The inorganic constituents can be selected from the group consisting of phyllosilicates or tectosilicates. | 10-04-2012 |
20120298574 | Organic/Inorganic Hybrid Compound For Fouling Resistance, Membrane Including The Same For Fouling Resistance, And Method Of Preparing Membrane For Fouling Resistance - An organic/inorganic composite compound for fouling resistance may include a core and at least an arm. The core may be formed of a polyhedron of polyhedral oligomeric silsesquioxane. At least one arm may be connected to a Si atom of the polyhedral oligomeric silsesquioxane. The arm may include a vinyl-based first structural unit including at least one ethylene oxide group at the side chain, and a hydrophobic vinyl-based second structural unit. | 11-29-2012 |
20130032530 | COMPOSITE SEMIPERMEABLE MEMBRANE - Disclosed is a composite semipermeable membrane, which comprises a separation functional layer on a microporous support, and in which the separation functional layer is made of a condensation product of a polymer that has acidic groups and a trialkoxysilane groups having an imidazolium structure in side chains. The composite semipermeable membrane has excellent selective separation performance for divalent ions over monovalent ions, while exhibiting excellent long-term durability. Also disclosed is a method for producing the composite semipermeable membrane. The composite semipermeable membrane is suitable for uses in various water treatment fields such as the desalination of seawater and the production of drinking water. In addition, the composite semipermeable membrane does not deteriorate as much as conventional composite semipermeable membrane even in cases where the membrane is sterilized by having chlorine-containing raw water permeate therethrough continuously or intermittently. | 02-07-2013 |
20130112615 | ORGANIC/INORGANIC FOULING RESISTANT HYBRID COMPOUND, FOULING RESISTANT MEMBRANE, AND METHOD OF PREPARING FOULING RESISTANT MEMBRANE - An organic/inorganic fouling resistant composite compound is disclosed, which includes a core of a polyhedron of polyhedral oligomeric silsesquioxane and at least one arm connected to a silicon atom of the polyhedral oligomeric silsesquioxane. The at least one arm includes a vinyl-based first structural unit including at least one ethylene oxide group at a side chain of the vinyl-based first structural unit and an oleophobic vinyl-based second structural unit including a silicon group at the side chain. | 05-09-2013 |
20130240437 | NANOCOMPOSITE POLYMER-CARBON BASED NANOMATERIAL FILTERS FOR THE SIMULTANEOUS REMOVAL OF BACTERIA AND HEAVY METALS - The disclosed subject matter provides a filter that is modified by a polymer-carbon based nanomaterial nanocomposite intended to significantly enhance the performance of filtration, separation, and remediation of a broad variety of chemicals, heavy metal ions, organic matters, and living organisms. Polymeric materials, such as but not limited to poly-N-vinyl carbazole (PVK), are combined with (1) graphene (G) and/or graphene-like materials based nanomaterials and (2) graphene oxide (GO) chemically modified with a chelating agent such as but not limited to EDTA. The nanocomposite is homogenously deposited on the surface of the membrane. | 09-19-2013 |
20130306550 | REVERSE OSMOSIS MEMBRANE HAVING GOOD ANTIFOULING PROPERTIES AND METHOD OF MANUFACTURING THE SAME - A reverse osmosis membrane includes a porous support, a polyamide active layer formed on the porous support, and a coating layer including a copolymer including an amphoteric ionic compound and glycidyl (meth)acrylate. The coating layer makes a chemical bond with the polyamide active layer. A method of manufacturing the reverse osmosis membrane also is disclosed. | 11-21-2013 |
20140284269 | POROUS ABPBI [PHOSPHORIC ACID DOPED POLY (2, 5-BENZIMIDAZOLE)] MEMBRANE AND PROCESS OF PREPARING THE SAME - The present invention relates to a porous ABPBI (phosphoric acid doped poly (2, 5-benzimidazole)) membrane and process of preparing the same. A stable porous ABPBI (Phosphoric Acid Doped Poly (2, 5-benzimidazole)) membrane stable to acids, bases, solvents and autoclaving is disclosed. The membrane finds use for separation of solutes in solution in acids, bases and solvents. | 09-25-2014 |
20140299538 | Antifouling and Chlorine-Resistant Ultrathin Coatings on Reverse Osmosis Membranes - Disclosed are methods of preparing antifouling and chlorine-resistant coatings on reverse osmosis membranes with initiated chemical vapor deposition. The coatings enhance the stability and lifetime of membranes without sacrificing performance characteristics, such as permeability or salt retention. | 10-09-2014 |
20150299395 | Polyarylene ether sulfones - A process for the manufacturing of a poly(arylether sulfone)polymer comprising reacting in a solvent mixture comprisng a polar aprotic solvent and in the presence of an alkali metal carbonate, a monomer mixture which contains: at least one 1,4:3,6-dianhydrohexitol selected from the group consisting of isosorbide (1), isomannide (2) and isoidide (3); at least one dihaloaryl compound of formula (S): X—Ar | 10-22-2015 |
20150321146 | COMPOSITE MEMBRANE UTILIZED IN MEMBRANE DISTILLATION - A composite membrane includes a hydrophobic porous membrane and a high water content hydrogel layer disposed on the surface of the hydrophobic porous membrane facing the hot end. The surface active agents contained in the wastewater at the hot end are blocked by the high water content hydrogel layer, thus the problem of pore wetting of the hydrophobic porous membrane can be prevented. Therefore, the membrane distillation technique can be utilized for processing wastewater containing surface active agents. | 11-12-2015 |
20150343397 | MEMBRANE COMPRISING SELF-ASSEMBLED BLOCK COPOLYMER AND PROCESS FOR PRODUCING THE SAME BY SPRAY COATING (Ic) - Disclosed are membranes formed from self-assembling diblock copolymers of the formula (I): | 12-03-2015 |
20150343398 | MEMBRANE COMPRISING SELF-ASSEMBLED BLOCK COPOLYMER AND PROCESS FOR PRODUCING THE SAME BY SPRAY COATING (IIc) - Disclosed are membranes formed from self-assembling block copolymers, for example, a diblock copolymer of the formula (I): | 12-03-2015 |
20160144321 | GRAPHENE FILTERING SHEET AND METHOD OF FABRICATING THE SAME - A graphene filtering sheet is disclosed. The sheet includes a reduced grapheme oxide (r-GO) dispersed in a polymer with the reduced grapheme oxide (r-GO) having a chemical structure with C/O ratio ranging from 0.1 to 50. The reduced grapheme oxide is obtained via hydrothermal method. The graphene filtering sheet has a capacity of separating alcohol from water with an efficiency approximated to 100%. | 05-26-2016 |
210500290 | Cellulosic | 18 |
20110198282 | HIGH FLUX HIGH EFFICIENCY NANOFIBER MEMBRANES AND METHODS OF PRODUCTION THEREOF - A membrane is provided including a coating layer having cellulose nanofibers produced from oxidized cellulose microfibers and an electrospun substrate upon which the coating layer is applied. The nanofibers of the electrospun substrate have a diameter greater than that of the cellulose nanofibers. The membrane also has non-woven support upon which the electrospun substrate is disposed. Microfibers of the non-woven support have a diameter greater than that of the nanofibers of the electrospun substrate. Application of electrospun membrane is in microfiltration area, while the cellulose nanofiber membrane serves in ultra-filtration, nanofiltration, and reverse osmosis after chemical modification. | 08-18-2011 |
20110210064 | FILTRATION MATERIAL FOR DESALINATION - The invention discloses a filtration material for desalination, including a support layer, and a desalination layer formed on the support layer, wherein the desalination layer is a fiber composite membrane and includes at least one water-swellable polymer. The water-swellable polymer is made of hydrophilic monomers and hydrophobic monomers, and the hydrophilic monomers include ionic monomers and non-ionic monomers, and the ionic monomers include cationic monomers and anionic monomers. | 09-01-2011 |
20120000846 | POLYMER COATED HYDROLYZED MEMBRANE - A method of forming a polymer coated hydrolyzed membrane includes forming a membrane from a first hydrophilic polymer by immersion precipitation, coating the membrane with a thin layer of a second hydrophilic polymer more pH tolerant than the first hydrophilic polymer to form a dense rejection layer, and exposing the coated membrane to a high pH solution thereby forming a hydrolyzed ultrafiltration membrane. A polymer coated hydrolyzed membrane includes a porous membrane formed from a first hydrophilic polymer by immersion precipitation and from hydrolysis, and a dense rejection layer applied to the membrane and formed from a second hydrophilic polymer more pH tolerant than the first hydrophilic polymer. | 01-05-2012 |
20120043275 | Nanofabricated Membrane Using Polymerized Proteoliposomes - The present invention generally related to a nanofabricated membrane including polymerized proteoliposomes. The nanofabricated membrane is a bio-nano fused selective membrane using protein-incorporated uv-crosslinkable liposomes with a chemical reactive biocompatible interstitial matrix. In the present invention, internally UV-crosslinked protein-incorporated proteolipsomes are used because the proteoliposomes made by natural lipids have a short life time and a weak resistance to the circumstantial stresses such as a high and low temperature, pressure, ionic strength etc. Furthermore, the proteo-vesicles made by amphiphilic block copolymers provide less consistency in accomplishing proper functionality batch to batch because of the inevitable polydiversity of the polymer. | 02-23-2012 |
20130334130 | NOVEL FOULING RESISTANT COATING FOR FILTRATION MEMBRANES AND METHODS OF PRODUCING AND USING SAME - A conformal coating that resists fouling by waterborne contamination in aquatic environments, a method for fabricating the coating, and a filter having such a coating are disclosed. The coating comprises a hydrophilic polymer and a surfactant wherein the surfactant undergoes a phase change upon exposure to a saline solution. Also disclosed are in situ methods for regenerating anti-fouling filters having the fouling resistant coating. | 12-19-2013 |
20140069862 | COATED MICROPOROUS MATERIALS HAVING FILTRATION AND ADSORPTION PROPERTIES AND THEIR USE IN FLUID PURIFICATION PROCESSES - The present invention is directed to microfiltration and ultrafiltration membranes comprising a microporous material. The microporous material comprises:
| 03-13-2014 |
20140083930 | DESALINATION TREATMENT MEMBRANE - According to one embodiment, a desalination treatment membrane includes a desalting membrane and a base material which is disposed in close contact with the desalting membrane, wherein a solid salt is fixed to the base material by a graft-polymerization. | 03-27-2014 |
20150068973 | METHOD FOR PREPARING A MEMBRANE FROM FIBRIL CELLULOSE AND FIBRIL CELLULOSE MEMBRANE - Method for preparing a membrane from fibril cellulose includes supplying fibril cellulose dispersion on a filter layer, draining liquid from a fibril cellulose dispersion by the effect of reduced pressure through the filter layer that is impermeable to fibrils of the fibril cellulose but permeable to the liquid to form a membrane sheet on the filter fabric, applying heat on the opposite side of the membrane sheet to the membrane sheet while continuing draining of the liquid through the filter layer by pressure difference over the filter layer, and removing the membrane sheet from the filter layer as a freestanding membrane. | 03-12-2015 |
20150328591 | POROUS POLYMER FLAT-SHEET MEMBRANE - The present invention provides a porous polymer flat-sheet membrane for MBR wherein surface of the porous polymer membrane is kept hydrophilic for a long period and high water permeability and anti-fouling properties are kept. A porous polymer flat-sheet membrane for MBR comprising a hydrophobic porous polymer membrane forming a network structure and a sheet substrate supporting it, characterized in that at least surface of the porous polymer membrane is coated and fixed with an insolubilized hydroxypropyl cellulose, that a ratio of the hydroxypropyl cellulose to the porous polymer membrane is 0.4 to 1.0% by weight and that, when NMR spectrum of the hydroxypropyl cellulose coated on and fixed to the membrane is measured using a nuclear magnetic resonance apparatus (proton NMR), an intensity ratio (B/A) of a spectral peak (B) appearing at 4.12 ppm to a spectral peak (A) appearing at 3.75 ppm is 12 to 30%. | 11-19-2015 |
20150367288 | COMPOSITE POLYAMIDE MEMBRANE INCLUDING DISSOLVABLE POLYMER COATING - A thin film composite membrane including a thin film polyamide layer positioned between a porous support and an outer coating, and a humectant; wherein the membrane has an A-value of at least 8 l/m | 12-24-2015 |
210500300 | Cellulose acetate | 8 |
20120261332 | SEMIPERMEABLE MEMBRANE AND MANUFACTURING METHOD THEREFOR - Provided is a semipermeable membrane having at least a separating functional layer, wherein azo compounds are retained in the separating functional layer, and the separating functional layer has a yellow index of 10 to 40. Also provided is a method of producing the semipermeable membrane. The present invention provides a semipermeable membrane having not only high water permeability but also high rejection performance even for substances that are nondissociative in the neutral range, such as boric acid, and showing high durability and a manufacturing method therefor. | 10-18-2012 |
20140116934 | REGENERATED CELLULOSE POROUS MEMBRANE FOR POROUS DIFFUSION AND METHOD OF MANUFACTURING SAME - A pore diffusion type flat membrane separation apparatus X including a plurality of flat membranes | 05-01-2014 |
20150027945 | MEMBRANE FILTER INCLUDING BILE ACID AND A METHOD OF MANUFACTURING THE SAME - A membrane filter | 01-29-2015 |
20150053607 | Graphene Derivative Composite Membrane And Method For Fabricating The Same - The invention provides a graphene derivative composite membrane and method for fabricating the same. The graphene derivative composite membrane comprises a support membrane made of porous polymer and a plurality of graphene derivative layers disposed on the support membrane wherein the distance between adjacent graphene derivative layers is about 0.3˜1.5 nm and the total thickness of the plurality of graphene derivative layers is more than 100 nm. | 02-26-2015 |
20150136690 | METHOD OF MAKING A MEMBRANE AND A MEMBRANE FOR WATER FILTRATION - A method of making a membrane and a membrane made from the method are provided. The method comprises coupling a vesicle to a support substrate, the vesicle comprising a plurality of water channels; and partially embedding the vesicle coupled to the support substrate in a layer of material that is substantially impermeable to water to form the membrane. | 05-21-2015 |
20160051939 | NANOCOMPOSITE ULTRA-THIN SEPARATION MEMBRANE AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to a nanocomposite ultra-thin separation membrane and a method for manufacturing the same, wherein the nanocomposite ultra-thin separation membrane for seawater desalination according to the present invention includes: 1) a polyamide-based polymer active layer; 2) a polyethersulfone support membrane; 3) an external support body; and 4) carbon nanotube, to remarkably improve hydrophilicity of the porous support membrane, thereby having more than doubled water permeability of the entire separation film. In addition, due to a physiochemical reaction of the functionalized carbon nanotube, a support membrane exposed to air for a long period of time is also usable as a lower body of the ultra-thin separation membrane. | 02-25-2016 |
210500310 | Cellulose diacetate | 1 |
20140091032 | Asymmetric Nanotube Containing Membranes - This invention relates to heterogenous pore polymer nanotube membranes useful in filtration, such as reverse osmosis desalination, nanofiltration, ultrafiltration and gas separation. | 04-03-2014 |
210500320 | Cellulose triacetate | 1 |
20120175300 | TWO-LAYER MEMBRANE - A method of forming a two-layered membrane by immersion precipitation including: depositing a first hydrophilic polymer solution with a formulation optimized to produce a high performance porous layer; depositing on top of the first hydrophilic polymer solution a second, different hydrophilic polymer solution optimized to produce a high performance dense layer; and forming the two-layer polymer solution into one of a forward osmosis membrane and a pressure retarded osmosis membrane by bringing the second, different hydrophilic polymer solution into contact with water to form the dense layer. A two-layered membrane formed by immersion precipitation includes: a porous layer formed from a first hydrophilic polymer solution with a formulation optimized to produce a high performance porous layer; and a dense layer on top of and supported by the porous layer, the dense layer formed from a second, different hydrophilic polymer solution optimized to produce a high performance dense layer. | 07-12-2012 |
210500330 | Homocyclic | 44 |
20080277333 | CHLORINE RESISTANT POLYAMIDES AND MEMBRANES MADE FROM THE SAME - A chlorine resistant polyamide is formed from the reaction product of an amine and an acid chloride monomer wherein the acid chloride monomer is modified with electron-withdrawing groups that exhibit sufficient activity to (i) minimize any chlorination on both the amine and acid chloride side and (ii) minimize N-chlorination. A membrane is made from the polyamide and, in one application, the membrane is used in a desalination unit. | 11-13-2008 |
20080290022 | Crosslinked Polymer Film Bearing Ionic Groupings - The invention relates to the preparation of a crosslinked polymeric film bearing ionic groupings. | 11-27-2008 |
20090242478 | CARBON MEMBRANE LAMINATED BODY AND METHOD FOR MANUFACTURING THE SAME - A carbon membrane laminated body includes: a porous substrate, a first porous carbon membrane as a carbon membrane underlayer disposed on a surface of the porous substrate, and a second porous carbon membrane as a carbon membrane separation layer disposed on a surface of the carbon membrane underlayer, having a smaller film thickness, and a smaller average pore diameter, compared with those of the carbon membrane underlayer. It is preferable to form the carbon membrane underlayer and the carbon membrane separation layer by carbonizing a carbon membrane underlayer precursor disposed on a surface of the porous substrate and the carbon membrane separation layer precursor disposed on a surface of the carbon membrane underlayer precursor at 400 to 1000° C. in a non-oxidation atmosphere. The carbon membrane laminated body is a separation membrane excellent in both separation performance and flux when it is used as a separation membrane of a mixture. | 10-01-2009 |
20100006496 | WATER SEPARATION MEMBRANE - Provided is a water separation membrane capable of effectively separating water from a water solution of ethanol, saccharide or the like. The water separation membrane is composed of polypyrrole doped with a sulfonate ion. The sulfonate ion may be an aromatic or aliphatic sulfonate ion. | 01-14-2010 |
20100051538 | WATER PURIFICATION MEMBRANES WITH IMPROVED FOULING RESISTANCE - The present invention includes methods and compositions for liquid separation and water purification. The present invention includes a purification membrane having a polymer matrix purification membrane that has been treated with dopamine to form a polydopamine coated membrane with a high water flux and a high hydrophilicity. | 03-04-2010 |
20100219123 | NANO-FIBER MATERIAL AND SALT REJECTION FILTRATION MATERIAL - The invention discloses a nano-fiber material, wherein the nano-fiber material is formed by spinning an ionic polymer into a nano-fiber nonwoven, and the ionic polymer is represented by the formula: | 09-02-2010 |
20110108478 | Hydrophilic Polyethersulfone Filtration Membrane, Process for Producing the Same, and Dope Solution - A hydrophilic filtration membrane having high chemical resistance, high strength, high water permeability and high blocking performance, and being superior in fouling resistance is provided. A hydrophilic filtration membrane containing a hydrophilic polyethersulfone having a contact angle of 65 to 74 degree, a molecular weight of 10,000 to 100,000, and the number of hydroxy groups of 0.6 to 1.4 per 100 polymerization repeating units. The hydrophilic filtration membrane may additionally contain a polyvinylpyrrolidone having a molecular weight of 10,000 to 1,300,000. | 05-12-2011 |
20110139709 | PROCESS OF FORMING CROSSLINKED COPOLYMER FILM, CROSSLINKED COPOLYMER FILM FORMED THEREBY, AND WATER PURIFICATION MEMBRANE - Azidoaryl-substituted cyclooctene monomers and synthesized and used in the preparation of various copolymers. Among these copolymers are those prepared from ring-opening metathesis polymerization of cyclooctene, polyethylene glycol-substituted cyclooctene, and azidoaryl-substituted cyclooctene. These copolymers are useful in the formation of crosslinked films that reduce fouling of water purification membranes. | 06-16-2011 |
20110220569 | COMPOSITE MEMBRANE INCLUDING COATING OF POLYALKYLENE OXIDE AND ACETOPHENONE COMPOUNDS - Composite membranes including a coating of polyalkylene oxide and acetophenone compounds along with various methods for making and using the same. In one embodiment, the composite membrane comprises a thin film polyamide layer including a coating of a reaction product of a polyalkylene oxide compound and an acetophenone compound. In another embodiment, the coating comprises a polymer including alkylene oxide repeating units and one or more acetophenone functional groups. | 09-15-2011 |
20110284457 | COMPOSITE MEMBRANE WITH COATING COMPRISING POLYALKYLENE OXIDE AND OXY-SUBSTITUTED PHENYL COMPOUNDS - Composite membranes including a coating of polyalkylene oxide and oxy-substituted phenyl compounds along with various methods for making and using the same. In one embodiment, the composite membrane comprises a thin film polyamide layer including a coating of a reaction product of a polyalkylene oxide compound and an oxy-substituted phenyl compound. In another embodiment, the coating comprises a polymer including alkylene oxide repeating units and one or more oxy-substituted phenyl functional groups. | 11-24-2011 |
20120211414 | SELECTIVE MEMBRANE HAVING A HIGH FOULING RESISTANCE - A selective membrane having a high fouling resistance. In one embodiment, the selective membrane is a composite polyamide reverse osmosis membrane having a hydrophilic coating made by covalently bonding a hydrophilic compound to the polyamide membrane, the hydrophilic compound including (i) a reactive group that is adapted to covalently bond directly to the polyamide membrane, the reactive group being at least one of a primary amine and a secondary amine; (ii) a non-terminal hydroxyl group; and (iii) an amide group. In another embodiment, the hydrophilic compound includes (i) a reactive group adapted to covalently bond directly to the polyamide membrane, the reactive group being at least one of a primary amine and a secondary amine; (ii) a hydroxyl group; and (iii) an amide group, the amide group being linked directly to the hydroxyl group by one of an alkyl group and an alkenyl group. | 08-23-2012 |
20120223010 | SULFONATED POLY (ARYL ETHER) MEMBRANE INCLUDING BLEND WITH PHENYL AMINE COMPOUND - A membrane comprising a blend of a sulfonated poly(aryl ether) and a phenyl amine compound along with methods for making and using the same. Many additional embodiments are described including applications for such membranes. | 09-06-2012 |
20120292249 | COMPOSITE MEMBRANE AND METHOD OF MAKING - The present invention provides a composite membrane comprising a porous base membrane and a polyamide coating disposed on said porous base membrane, said polyamide coating comprising a C | 11-22-2012 |
20130256215 | COMPOSITE SEMIPERMEABLE MEMBRANE - Provided is a composite semipermeable membrane, comprising: a microporous support membrane which comprises a substrate and a porous support, and a polyamide separation functional layer formed on the microporous support membrane, wherein the polyamide has an irreversible heat absorption, which is measured using temperature modulated DSC, of 275 J/g or more at a temperature in the range of −20 to 150° C. in the first heating process. | 10-03-2013 |
20130292325 | METHOD FOR PREPARING REVERSE OSMOSIS MEMBRANE, AND REVERSE OSMOSIS MEMBRANE PREPARED THEREBY - There is disclosed a method for preparing a reverse osmosis membrane, the method including: forming a first coating layer by coating an aqueous amine solution on a surface of a microporous support to have a thickness of 20 μm to 30 μm; removing an excess of the aqueous amine solution from the microporous support; and forming a second coating layer by coating an aliphatic hydrocarbon-based organic solution including acyl halide on the first coating layer to have a thickness of 10 μm to 30 μm. | 11-07-2013 |
20130313187 | Resilient Ion Exchange Membranes - A process for producing a resilient ion exchange membrane. The process comprises the steps of ( | 11-28-2013 |
20140014575 | REVERSE OSMOSIS MEMBRANE - There is provided a reverse osmosis membrane including a porous support; a polysulfone layer formed on the porous support and having pores formed in a surface thereof, pores having a diameter of 40 nm or greater accounting for less than 0.5% of total pores; and an active layer. | 01-16-2014 |
20140042082 | CHLORINE RESISTANT AMIDES, POLYAMIDES, AND MEMBRANES MADE FROM THE SAME - A chlorine resistant polyamide is formed from the reaction product of an amine and an acid chloride monomer wherein both the amine and the acid chloride monomer are modified with electron-withdrawing groups that exhibit sufficient activity to (i) minimize any chlorination on both the amine and acid chloride and (ii) minimize N-chlorination. A membrane is made from the polyamide for use, for example, in a desalination unit. | 02-13-2014 |
20140217014 | COMPOSITE FILTRATION MEMBRANES AND METHODS OF PREPARATION THEREOF - A method comprises disposing, on a porous support membrane, an aqueous mixture comprising a crosslinkable polymer comprising a poly(meth)acrylate and/or poly(meth)acrylamide backbone, thereby forming an initial film layer, wherein the crosslinkable polymer comprises a side chain nucleophilic amine group capable of interfacially reacting with a multi-functional acid halide crosslinking agent to form a crosslinked polymer; contacting the initial film layer with a mixture comprising i) the multi-functional acid halide crosslinking agent, ii) an optional accelerator, and iii) an organic solvent, the organic solvent being a non-solvent for the crosslinkable polymer; and allowing the crosslinkable polymer to interfacially react with the crosslinking agent, thereby forming a composite filtration membrane comprising an anti-fouling selective layer comprising the crosslinked polymer. | 08-07-2014 |
20140251897 | MEMBRANES FOR SEPARATION - The present invention relates to a composite membrane for gas separation and/or nanofiltration of a feed stream solution comprising a solvent and dissolved solutes and showing preferential rejection of the solutes. The composite membrane comprises a separating layer with intrinsic microporosity. The separating layer is suitably formed by interfacial polymerisation on a support membrane. Suitably, at least one of the monomers used in the interfacial polymerisation reaction should possess concavity, resulting in a network polymer with interconnected nanopores and a membrane with enhanced permeability. The support membrane may be optionally impregnated with a conditioning agent and may be optionally stable in organic solvents, particularly in polar aprotic solvents. The top layer of the composite membrane is optionally capped with functional groups to change the surface chemistry. The composite membrane may be cured in the oven to enhance rejection. Finally, the composite membrane may be treated with an activating solvent prior to nanofiltration. | 09-11-2014 |
20140332462 | FLUX-ENHANCED HIERARCHICAL POROUS MEMBRANE FOR OIL-WATER NANOEMULSION SEPARATION - Hierarchical porous membranes suitable for use in oil/water separation processes are provided. The membranes described herein are particularly well suited for separating trace amounts of water (e.g., no greater than 3 wt % water content, no greater than 1 wt % water content, or 50-1000 ppm water) from oil in droplets less than 1 um in size. The membranes have a wide range of applications, including deep seep oil exploration, oil purification, and oil spill cleanup. | 11-13-2014 |
20140353241 | RESILIENT ANION EXCHANGE MEMBRANES - A resilient anion exchange membrane including a porous matrix impregnated with a cross-linked homogenous ion-transferring polymer that fills the pores and substantially covers the surfaces of the porous matrix. The cross-linked homogenous ion-transferring polymer formed by polymerizing a homogeneous solution including (i) a hydrophilic ionic monomer selected from a group consisting of 3-methacryloylaminopropyl trimethylammonium chloride, vinylbenzyl trimethylammonium chloride, 3-acrylamidopropyl trimethylammonium chloride, 2-acryloyloxyethyl trimethylammonium chloride, and mixtures thereof, with (ii) a hydrophobic cross-linking oligomer selected from a group consisting of polyurethane oligomer diacrylate, polyester oligomer diacrylate, epoxy oligomer diacrylate, polybutadiene oligomer diacrylate, silicone diacrylate, dimethacrylate counterparts thereof, polyurethane oligomers having three or more vinyl groups, polyester oligomers having three or more vinyl groups, and mixtures thereof. | 12-04-2014 |
20150021262 | THIN FILM COMPOSITE MEMBRANES EMBEDDED WITH MOLECULAR CAGE COMPOUNDS - A polymeric membrane on a support, wherein the polymeric membrane includes a crosslinked polymer covalently bound to a molecular cage compound. An interfacial polymerization method for making the polymeric membrane is also disclosed. | 01-22-2015 |
20150083660 | HIGH PERMEATE FLUX REVERSE OSMOSIS MEMBRANE INCLUDING CARBODIIMIDE COMPOUND AND METHOD OF MANUFACTURING THE SAME - The present invention relates to a reverse osmosis membrane including a porous support including a polysulfone layer; and a polyamide active layer formed on the porous support, wherein a concentration of sulfur (S) detected on a surface of the polyamide active layer is 1.8×10 | 03-26-2015 |
20150136692 | REVERSE OSMOSIS MEMBRANE FOR WASTEWATER TREATMENT - To provide a reverse osmosis membrane where both salt rejection rate and water permeability required for wastewater treatment are achieved in a high level in spite of using the materials having excellent resistance to chemicals (resistance to alkali and to chlorine). | 05-21-2015 |
20150328592 | THIN FILM COMPOSITE RESERVE OSMOSIS MEMBRANE WITH ANTIFOULING PROPERTIES AND METHOD OF PREPARATION OF THE SAME - The present invention relates to the preparation of novel antibiofouling Thin Film Composite (TFC) Reverse Osmosis (RO) membranes on porous polysulfone (PSf) support of thickness 30-40 micron. TFC-RO membranes were prepared by interfacial polymerization between neat m-phenylenediamine (MPD) in water and pyridine tricarboxylic acid chloride (PTC) or a mixture containing PTC and trimesoyl chloride (TMC) in mixture of hexane+dichloromethane. The best results in terms of flux, NaCl rejection and antibiofouling property were obtained with 2:3-1:1 weight ratio of PTC to TMC. The present invention also relates to the preparation of antibiofouling TFC membranes by the interfacial polymerization between mixture of melamine+MPD and TMC. The best results in terms of antibiofouling property, NaCl rejection and flux were obtained with 1:1 weight ratio of MPD to melamine. | 11-19-2015 |
20150343396 | MEMBRANE COMPRISING SELF-ASSEMBLED BLOCK COPOLYMER AND PROCESS FOR PRODUCING THE SAME BY HYBRID CASTING (Ib) - Disclosed are membranes formed from self-assembling diblock copolymers of the formula (I): | 12-03-2015 |
20150375178 | POLYAMIDE WATER-TREATMENT SEPARATION MEMBRANE HAVING SUPERIOR OXIDATION RESISTANCE AND CHLORINE RESISTANCE PROPERTIES, AND METHOD OF MANUFACTURING THE SAME - The present disclosure relates to a water-treatment separation membrane including: a porous support and a polyamide layer formed on the porous support, wherein the polyamide layer contains an antioxidant having a solubility parameter value of 9 (J/cm | 12-31-2015 |
20160008773 | COMPOSITE SEMIPERMEABLE MEMBRANE AND PRODUCTION THEREOF | 01-14-2016 |
20160038888 | ION EXCHANGE MEMBRANES SELECTIVELY PERMEABLE TO SPECIFIC IONS - A monovalent ion permselective ion exchange membrane comprising a base layer consisting of an ion exchange membrane, and a monovalent ion permselective layer affixed to the surface of the base layer. The monovalent ion permselective layer is formed by coating and polymerizing a polymerizable solution onto the base ion exchange membrane layer. The polymerizable solution comprises: (i) of an ionic monomer having one or more ethylenic groups selected from (meth)acryloxy groups, (meth)acryl-amido groups, and vinylbenzyl groups, (ii) a hydrophobic crosslinking monomer having two or more ethylenic groups selected from (meth)acryloxy groups, (meth)acrylamido groups, and vinylbenzyl groups, (iii) a free radical initiator, in (iv) a solvent medium. The monovalent ion permselective ion exchange membranes include monovalent cation permselective ion exchange membranes and monovalent anion permselective ion exchange membranes. Also disclosed are processes for preparing the monovalent ion permselective ion exchange membranes. | 02-11-2016 |
20160074814 | COMPOSITE SEPARATION MEMBRANE INCLUDING GRAPHENE OXIDE COATING LAYER AND METHOD FOR MANUFACTURING THE SAME - The present invention relates to a composite separation membrane including a graphene oxide coating layer. The composite separation membrane of the present invention has both high carbon dioxide permeability and high selectivity for carbon dioxide over nitrogen, hydrogen or methane gas, is free of surface defects, and exhibits remarkably increased selectivity for carbon dioxide over other gases (hydrogen, nitrogen, methane, etc.) without any change in carbon dioxide permeability, particularly even when exposed to water. Due to these advantages, the composite separation membrane of the present invention can be applied to industrial fields involving carbon dioxide separation and recovery processes. The present invention also relates to a method for manufacturing the composite separation membrane. | 03-17-2016 |
20160108178 | BLOCK COPOLYMERS - Block copolymer comprising polyarylene ether blocks and polyalkylene oxide blocks, wherein said block copolymer comprises at least two polyalkylene oxide blocks that are endcapped with different endcapping groups. | 04-21-2016 |
20160184778 | Functionalization of Nanofibrous Microfiltration Membranes for Water Purification - A high flux and low pressure drop microfiltration (MF) membrane and a method for making the MF membrane. The microfiltration membranes are formed by a method that includes: preparing a nanofibrous structure; and modifying the surface of the nanofibrous structure with a surface modifier. The nanofibrous structure includes an electrospun nanofibrous scaffold or a polysaccharide nanofiber infused nanoscaffold or mixtures thereof. The electrospun nanofibrous scaffold can include polyacrylonitrile (PAN) or polyethersulfone (PES))/polyethylene terephthalate (PET) or mixtures thereof. The surface modifier includes polyethylenimine (PEI) and polyvinyl amine (Lupamin) cross-linked by ethylene glycol diglycidyl ether (EGdGE)/glycidyltrimethylammonium chloride (GTMACl) or poly(1-(1-vinylimidazolium)ethyl-3-vinylimdazolium dibromide (VEVIMIBr). | 06-30-2016 |
20160199788 | SURFACE-MODIFIED SEPARATION MEMBRANE AND METHOD FOR MODIFYING SURFACE OF SEPARATION MEMBRANE | 07-14-2016 |
210500340 | Styrene | 10 |
20090184047 | Functionalized nanopore membranes and related methods of use - Functionalized nanopore membranes, apparatus and related methods, as can be used for selective analyte detection and/or separation. | 07-23-2009 |
20090188857 | PERMANENT HYDROPHILIC POROUS COATINGS AND METHODS OF MAKING THEM - A membrane includes a porous base membrane and a hydrophilic coating. The coating comprises a hydrophilic additive and a hydrophilic polymer derivatized with an electron beam reactive group adapted to form a radical under high energy irradiation. In some embodiments, the membrane comprises a fluoropolymer. Also disclosed are processes for forming the membrane. | 07-30-2009 |
20120111791 | Surface Deposition of Small Molecules to Increase Water Purification Membrane Fouling Resistance - The present invention includes methods and compositions for liquid separation and water purification. The present invention includes a purification membrane having a polymer matrix purification membrane that has been treated with hydroquinone, catechol, and/or dopamine coated membrane with a high water flux. | 05-10-2012 |
20130026091 | METHOD TO IMPROVE FORWARD OSMOSIS MEMBRANE PERFORMANCE - Described herein are thin film composite (TFC) membranes, for use in forward osmosis (FO) and pressure reduced osmosis (PRO) processes. The membrane is comprised of two layers: a composite layer combining a backing layer and a porous, polymer-based support into a single layer, and a rejection layer disposed on top of the composite layer. The membrane of the invention exhibits high water flux values for FO processes, is durable, may be readily manufactured using typical membrane manufacturing processes, such as spiral winding and plate and frame processes, and has sufficient mechanical stability to handle the final membrane product. | 01-31-2013 |
20130228511 | Antibiofouling Composition, Antibiofouling Membrane And Method For Forming The Same - The present invention provides an antibiofouling composition, an antibiofouling membrane and a method for forming the same. The antibiofouling composition comprises a copolymer and at least one solvent. The copolymer comprises at least one hydrophobic segment and at least one antibiofouling segment where the hydrophobic segment comprises a plurality of hydrophobic moieties and the antibiofouling segment comprises a plurality of antibiofouling moieties. The molar ratio of the total of hydrophobic moieties to the total of the antibiofouling moieties is 0.5˜6.0. | 09-05-2013 |
20130233791 | SEPARATION MEMBRANE FOR WATER TREATMENT AND MANUFACTURING METHOD THEREOF - The present invention relates to a separation membrane for water treatment having high water flux and membrane contamination preventing characteristics, and a manufacturing method thereof. The separation membrane for water treatment according to the present invention includes a nanofiber wherein the separation membrane has a surface electric charge. According to the present invention, a separation membrane for water treatment having high water flux and membrane contamination preventing characteristics, and a manufacturing method thereof may be implemented. | 09-12-2013 |
20140048478 | HIGHLY HYDROPHILIC AND HIGHLY OLEOPHOBIC MEMBRANE FOR OIL-WATER SEPARATION - A polymeric membrane for separating oil from water has a pore size of 0.005 μm to 5 μm, a thickness of 50 μm to 1,000 μm, a water contact angle of 0° to 60°, an oil contact angle of 40° to 100°. The membrane contains a hydrophobic matrix polymer and a functional polymer that contains a hydrophobic backbone and side chains. The side chains each have an oleophobic terminal segment and a hydrophilic internal segment. The weight ratio of the matrix polymer to the functional polymer is 99:1 to 1:9. Also disclosed is a method of making the above described membrane. | 02-20-2014 |
20140083931 | Anti-biofouling Membrane for Water-Treatment - This invention discloses an anti-biofouling membrane for water-treatment. The anti-biofouling membrane for water-treatment comprises a substrate, and an anti-biofouling copolymer on the substrate. The anti-biofouling copolymer comprises a plurality of hydrophobic groups and a plurality of hydrophilic groups. The anti-biofouling copolymer can be stably coated on the surface of the substrate by the hydrophobic groups. And the hydrophilic groups can help the anti-biofouling membrane to present excellent anti-biofouling capability. Preferably, the anti-biofouling copolymer coated on the substrate will not decrease the permeability of the substrate. More preferably, the presented capability of the mentioned anti-biofouling membrane for water-treatment can achieve the commercial level filtering membrane. | 03-27-2014 |
20150336058 | NANOPOROUS FILTRATION MEMBRANES - Disclosed are a nanoporous membrane suitable for use in ultrafiltration comprising nanoporous cross-linked poly(styrene)-block-poly(isoprene)-block-poly(styrene) and a composite comprising the porous membrane and a microporous support. Also disclosed are methods of preparing the nanoporous membrane and the composite membrane. | 11-26-2015 |
20160001238 | POLYMER FUNCTIONAL FILM AND METHOD FOR PRODUCING SAME - The present invention provides a polymer functional film obtained by polymerizing and curing a composition including (A) a styrene-based monomer represented by Formula (HSM); (B) a crosslinking agent represented by Formula (CL); and (C) a polymerization initiator represented by Formula (PI-1) or (PI-2), and a method for producing the same: | 01-07-2016 |