Entries |
Document | Title | Date |
20080197069 | Ceramic Filter Element for Water Purification - In a ceramic filter element | 08-21-2008 |
20080197070 | Composite Membranes and Membrane Systems and Methods For Production and Utilization Thereof - Thin film composite membranes on polyolefin structures may be prepared by interfacial polymerization on a polyolefin support. Polyolefin structures may have hollow and/or solid portions. The polyolefin structure may be hydrophilized prior to interfacial polymerization. The hydrophilized structure may also be treated with an aqueous monomer containing solution first, followed by the organic monomer containing solution. Alternatively, an organic monomer solution may be introduced first, followed by the aqueous monomer containing solution when treating a hydrophilized structure. The formed membrane may possess advantageous characteristics, including stability, hydrophilicity, predetermined pore sizes and/or solvent resistance. | 08-21-2008 |
20080290020 | METHOD FOR MAKING ORIENTED SINGLE-WALLED CARBON NANOTUBE/;POLYMER NANO-COMPOSITE MEMBRANES - Nano-composite membranes and methods for making them are described. The nano-composite membranes a made from a layer of oriented carbon nanotubes fixed in a polymeric matrix. Methods for efficient, facile, and inexpensive fabrication of the nano-composite membranes using a filtration method are also described. The carbon nanotubes may also be modified with chemical functional groups to promote their orientation in the carbon nanotube layer or to confer to them other properties. | 11-27-2008 |
20080290021 | Composite Membrane and Its Use in Separation Processes - The invention is directed to a composite ceramic/polymer membrane. The invention is further directed to the use of a composite membrane in pervaporation processes. According to the present invention there is provided a composite membrane comprising a support and a separation layer that comprises a rubbery polymer, wherein an intermediate layer is present between the separation layer and the support. | 11-27-2008 |
20100213117 | MEMBRANE POST TREATMENT - The invention relates to polymeric ultrafiltration or microfiltration membranes of, for instance, Halar, PVDF or PP, incorporating PVME or vinyl methyl ether monomers. The PVME may be present as a coating on the membrane or dispersed throughout the membrane or both. The membranes are preferably hydrophilic with a highly asymmetric structure with a reduced pore size and/or absence of macrovoids as a result of the addition of PVME. The PVME maybe cross-linked. The invention also relates to methods of hydrophilising membranes and/or preparing hydrophilic membranes via thermal or diffusion induced phase separation processed. | 08-26-2010 |
20100270234 | PLASTICIZATION RESISTANT MEMBRANES - This invention discloses a composition of, a method of making, and an application of high plasticization-resistant chemically cross-linked organic-inorganic hybrid membranes such as cross-linked cellulose acetate-cellulose triacetate-polyurethanepropylsilsesquioxane membranes. These cross-linked membranes with covalently interpolymer-chain-connected hybrid networks were prepared via a sol-gel condensation polymerization of cross-linkable organic polymer-organosilicon alkoxide precursor membrane materials. CO | 10-28-2010 |
20100320142 | ATMOSPHERIC PRESSURE MICROWAVE PLASMA TREATED POROUS MEMBRANES - Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength. | 12-23-2010 |
20110005997 | HYBRID TFC RO MEMBRANES WITH NITROGEN ADDITIVES - RO membranes using chlorinated water as a feed stream maybe protected from damage by the chlorine with a protective layer including reactive nitrogen which forms chloromines on the surface of the membrane that reduce chlorine penetration. This protective layer also provides substantial anti-fouling capabilities, whether used with a chlorinated or unchlorinated feed stream because the chloramines are anti-bacterial. Although chlorine is lost in use, the anti-fouling layer or coating can be recharged with additional chlorine without damaging the discrimination layer. The anti-fouling layer or coating may be advantageously used with Thin film composite, TFC, membranes for use in forward and reverse osmosis may include nanoparticles, monohydrolyzed and/or di-hydrolyzed TMC, and/or alkaline earth alkaline metal complexes or other additives. | 01-13-2011 |
20110017661 | CAUSTIC RESISTANT MEMBRANE - The invention relates to caustic resistant membranes formed by solvent casting a blend of one or more polyvinylidene fluoride polymers with one or more acrylic polymers. | 01-27-2011 |
20110017662 | COMPOSITE SEPARATION MEMBRANE - In order to obtain a composite separation membrane which has excellent chemical resistance, separation performance and water permeability at the same time, the present invention provides a composite separation membrane comprising a separation function layer on a porous supporting membrane, characterized in that the separation function layer contains at least a polymer of a polyhedral silsesquioxane represented by the following general formula (a) and a hydrophilic monomer. | 01-27-2011 |
20110049044 | CRYSTALLINE POLYMER MICROPOROUS MEMBRANE, METHOD FOR PRODUCING THE SAME, AN DFILTER FOR FILTRATION - To provide a membrane capable of efficiently collecting fine particles for a long period of time, disclosed is a polytetrafluoroethylene microporous membrane wherein the mean pore size in the surface of the membrane is larger than the mean pore size in the back thereof and the mean pore size continuously changes from the surface toward the back. | 03-03-2011 |
20110094960 | METHOD OF FORMING A REWETTABLE ASYMMETRIC MEMBRANE - The present disclosure provides rewettable asymmetric membranes and methods of forming rewettable asymmetric membranes. More specifically, methods are provided for forming rewettable asymmetric membranes having a copolymer and a polymerized material retained within the porous substrate. | 04-28-2011 |
20110120939 | CRYSTALLINE POLYMER MICROPOROUS MEMBRANE, METHOD FOR PRODUCING THE SAME, AND FILTRATION FILTER - A crystalline polymer microporous membrane containing a crystalline polymer microporous film containing a crystalline polymer, and having an asymmetric pore structure; a surfactant covering at least part of an exposed surface of the crystalline polymer microporous film; and a first crosslinking agent, wherein the surfactant is crosslinked with assistance of the first crosslinking agent. | 05-26-2011 |
20110210063 | ATMOSPHERIC PRESSURE MICROWAVE PLASMA TREATED POROUS MEMBRANES - Versions of the invention include compositions and methods for making them that include a polymeric porous membrane with one or more atmospheric pressure microwave plasma modified surfaces. The modified porous membrane is stable, non-dewetting, and retains its mechanical strength. | 09-01-2011 |
20120168370 | METHOD OF IMPROVING REJECTION OF PERMEABLE MEMBRANE AND PERMEABLE MEMBRANE - Provided is a method capable of effectively improving the rejection of a membrane without considerably lowering the permeation flux, even when the membrane has significantly degraded. The method of improving the rejection of a permeable membrane includes a step (amino treatment step) of passing an aqueous solution (amino treatment water) having a pH of 7 or less and containing an amino group-containing compound having a molecular weight of 1000 or less through the permeable membrane. After this amino treatment step, water having a higher pH than the amino treatment water is allowed to pass through the permeable membrane. Thus, by allowing the low-molecular-weight amino compound to pass through the membrane, a degraded portion of the membrane can be restored without considerably lowering the permeation flux of this permeable membrane, and the rejection can be effectively improved. | 07-05-2012 |
20120248030 | Curable Compositions And Membranes - A curable composition comprising: (i) 2.5 to 50 wt % crosslinker comprising at least two acrylamide groups; (ii) 12 to 65 wt % curable ionic compound comprising an ethylenically unsaturated group and a cationic group; (iii) 15 to 70 wt % solvent; and (iv) 0 to 10 wt % of free radical initiator; and (v) 2 to 50 wt % of non-curable salt; wherein the composition has a pH of 1 to 12. The compositions are useful for preparing ion exchange membranes. | 10-04-2012 |
20120267304 | Membrane, Method For Manufacturing The Same, And Composite Membrane Including The Same - Example embodiments relate to a membrane, a method of manufacturing the same, and a composite membrane including the same. The membrane may include a polyacrylonitrile-based copolymer that includes a hydrophobic side chain and/or a hydrophobic repeating unit. The membrane may include a skin layer and a porous layer. A thickness ratio of the skin layer relative to the porous layer may be about 0.01 or less. The skin layer may have a thickness of about 1 μm or less. The membrane may have a relatively high water flux. When using the membrane, a water treatment module having higher energy efficiency may be achieved. | 10-25-2012 |
20120325737 | POLYMER OR POLYMER COMPOSITE MEMBRANE HAVING THROUGH-THICKNESS MICROPORES, AND METHOD FOR PREPARING SAME - A polymer or polymer composite membrane having through-thickness micropores and a method of preparing the same are provided. More particularly, a polymer or polymer composite membrane having a pore structure such that micropores are aligned in a mesh structure in the thickness direction of the polymer or polymer composite membrane due to unidirectional freezing in the thickness direction of a solvent. The membrane has through-thickness micropores, and thus has improved permeability in the thickness direction and superior uniformity in size of the micropores and wall thickness between the micropores. For these reasons, the membrane can be used for a porous membrane substrate, microfiltration membrane, etc. | 12-27-2012 |
20130062278 | METHOD OF PREPARING A WATER VAPOR TRANSFER MEMBRANE - A method of making a water vapor transport membrane is described. The method can include providing two sheets, each sheet comprising a support layer with an ionomer layer thereon; applying a solvent to at least one sheet; and contacting the ionomer layers of the two sheets to form a composite membrane comprising a composite ionomer layer between the two support layers. A composite membrane is also described. | 03-14-2013 |
20130075325 | Surface-Modified Fluoropolymer Membrane - A method for use in the manufacture of a filtration article includes providing a porous, fluoropolymer membrane, and applying a force to at least a portion of a first side surface of the membrane to modify the first side surface. The applied force may have a non-normal directional component relative to the first side surface. The surface modification may increase the density of the modified surface and/or reduce the porosity of the modified surface. Particle retention capabilities are thereby enhanced across the modified surface while maintaining permeability across the volume of the membrane. | 03-28-2013 |
20130199995 | POROUS POLYMER MEMBRANES, METHODS OF MAKING, AND METHODS OF USE - Embodiments of the present disclosure may relate to porous polymer membranes, structures including porous polymer membranes, devices including porous polymer membranes, methods of using porous polymer membranes, methods of making porous polymer membranes, and the like. | 08-08-2013 |
20130228510 | HIGHLY UNIFORM SPUNBONDED NONWOVEN FABRICS - A catheter anchoring system, apparatus and method for securing a catheter to a patient's skin, having two flexible side members and a cross-member therebetween to which a retaining assembly is mounted. The retaining assembly may hold a catheter hub at an angle for patient comfort. Gripping tabs secure to each retaining assembly side are gripped while advancing a cannula guide needle into the patient's vein and while attaching the catheter hub to a medical accessory, such as intravenous (I.V.) tubing, for increased patient comfort, reduction of the risk in contamination and patient infection, and to more easily and quickly start an I.V. | 09-05-2013 |
20130248442 | METHOD FOR PRODUCING POROUS EPOXY RESIN SHEET - Provided is a porous epoxy resin sheet produced by cutting a cured epoxy resin body to a predetermined thickness, the porous epoxy resin sheet having a large surface area and a uniform in-plane pore size distribution. A method for producing a porous epoxy resin sheet, comprising forming a cylindrical or columnar cured resin body from a resin mixture containing an epoxy resin, a curing agent, and a porogen, cutting the surface of the cured resin body at a predetermined thickness to make an epoxy resin sheet, and then removing the porogen from the sheet to render the sheet porous, wherein when the cured resin body is formed from the resin mixture, curing is performed in a state where the viscosity of the mixture is at least 1,000 mPa·s. | 09-26-2013 |
20130299417 | POROUS POLYMER MEMBRANES - Manufacturing processes are provided for nano-porous polymer membranes. Also provided are intermediates suitable to obtain such membranes; polymer membranes as defined herein; shaped articles containing such membranes; and the use of such membranes, shaped articles and intermediates. | 11-14-2013 |
20130313186 | COMPOSITE SEMIPERMEABLE MEMBRANE AND PROCESS FOR PRODUCING THE SAME - Provided is a composite semipermeable membrane comprising a microporous support membrane and a separation functional layer formed thereon, wherein the separation functional layer is formed from Compound (A) in which a reactive group(s) having an ethylenically unsaturated group and a hydrolyzable group(s) are bonded directly to a silicon atom, Compound (B) having an ethylenically unsaturated group, the Compound (B) being different from said Compound (A), and Compound (C) having an ethylenically unsaturated group, the Compound (C) being different from said Compound (A) and (B), by condensation of hydrolyzable groups that the Compound (A) has and polymerization of ethylenically unsaturated groups that the Compound (A), the Compound (B), and the Compound (C) have, and the Compound (A), the Compound (B), and the Compound (C) satisfy the relationship of the following equation (I): | 11-28-2013 |
20140217013 | POLYKETONE POROUS FILM - To provide a polyketone porous film having heat resistance and chemical resistance and useful as a filter for filtration having a high particle collection efficiency and as a battery or capacitor separator having a low permeation resistance to ion and the like. | 08-07-2014 |
20140305863 | Composite Membranes - A process for making a composite membrane comprising the steps: (i) providing a moving poriferous support ( | 10-16-2014 |
20150014244 | COMPOSITE SEMIPERMEABLE MEMBRANE - To provide a composite semipermeable membrane capable of maintaining high removal performance even after its supporting membrane has come into contact with an aqueous solution high in salt concentration. A composite semipermeable membrane including: a supporting membrane which includes a substrate and a porous supporting layer; and a separation functional layer provided on the porous supporting layer, in which a strength to peel the porous supporting layer away from the substrate is 1.1 N/25 mm or higher. | 01-15-2015 |
20150298069 | POLYMER RESIN COMPOSITION FOR PREPARING OF MICROFILTER MEMBRANE OR ULTRAFILTER MEMBRANE, PREPARATION METHOD OF POLYMER FILTER MEMBRANE, AND POLYMER FILTER MEMBRANE - Provided is a polymer resin composition for preparing a microfilter membrane or an ultrafilter membrane, a method for preparing a polymer filter membrane using the polymer resin composition, and a polymer filter membrane prepared by the method. The polymer resin composition can provide a microporous membrane that includes more uniformly distributed micropores and exhibits high water permeability. | 10-22-2015 |
20160002489 | Development of Zwitterionic Coatings that Confer Ultra Anti-Biofouling Properties to Commercial Reverse Osmosis Membranes - Disclosed are methods of preparing antifouling 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. | 01-07-2016 |
20160008769 | FILTRATION MEMBRANES WITH FUNCTIONALIZED STAR POLYMERS | 01-14-2016 |
20190144344 | COHESIVE GRANULAR MATERIAL | 05-16-2019 |