405 results about "Coated membrane" patented technology

A porous polymer sheet or membrane is provided with a thin coating of an electrically non-conductive ceramic composition and the coating conforms to all surfaces, including the pore surfaces, of the membrane. Such a coated membrane serves well, for example, as an intra-cell separator in a lithium ion battery. The coating increases the mechanical properties and thermal stability of the separator in battery operation and retains electrolyte. The coating may be formed by a two-step vapor-phase process in which atoms of one or more metals such as aluminum, calcium, magnesium, titanium, silicon and/or zirconium are deposited in a conformal layer on a workpiece surface. The metal atoms may then be reacted with ammonia, carbon dioxide, and or water to form their respective non-conductive nitrides, carbides, and/or oxides on the surface. The two-step process is repeated as necessary to obtain a ceramic material coating of desired thickness.

A pharmaceutical dosage form such as a capsule capable of delivering therapeutic agents into the body in a time-controlled or position-controlled pulsatile release fashion, is composed of a multitude of multicoated particulates (beads, pellets, granules, etc.) made of one or more populations of beads. Each of these beads except an immediate release bead has at least two coated membrane barriers. One of the membrane barriers is composed of an enteric polymer while the second membrane barrier is composed of a mixture of water insoluble polymer and an enteric polymer. The composition and the thickness of the polymeric membrane barriers determine the lag time and duration of drug release from each of the bead populations. Optionally, an organic acid containing intermediate membrane may be applied for further modifying the lag time and/or the duration of drug release. The pulsatile delivery may comprise one or more pulses to provide a plasma concentration-time profile for a therapeutic agent, predicted based on both its pharmaco-kinetic and pharmaco-dynamic considerations and in vitro/in vivo correlations.

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.

The principal object of the present invention is to provide a coated cemented carbide tool whose both properties of breakage resistance and wear resistance are improved and whose life is lengthened.The present invention has been made to achieve this object and is related with a coated cemented carbide cutting tool comprising a substrate consisting of a matrix of WC and a binder phase of an iron group metal and a plurality of coated layers provided on a surface of the substrate, in which (a) an innermost layer, adjacent to the substrate, of the coated layers consists essentially of titanium nitride having a thickness of 0.1 to 3 mum, (b) on a mirror-polished cross-sectional microstructure of the said tool, an average crack interval in the coated film on a ridge of a cutting edge and/or rake face is smaller than an average crack interval in the coated layer on a flank face, (c) at least 50% of the cracks in the coated film on the said ridge of the cutting edge and/or rake face have ends of the cracks in the said innermost titanium nitride layer, in a layer above the titanium nitride layer or in an interface between these layers and (d) an average crack length in the coated film on the said ridge of the cutting edge and/or rake face is shorter than an average film thickness on the flank face.According to the present invention, quantitatively specifying the crack intervals and positions of the ends of the cracks in the coated layer results in excellent breakage resistance as well as wear resistance.

To provide a polymer electrolyte membrane having excellent size stability and excellent mechanical strength that can sufficiently prevent the size change due to the swelling condition, the displacement of the polymer electrolyte membrane and the formation of wrinkles during the production of the polymer electrolyte fuel cell, and can prevent damage during the production and operation of the polymer electrolyte fuel cell. In a composite electrolyte membrane including a porous reinforcement layer made of a resin and an electrolyte layer made of a polymer electrolyte and laminated at least one main surface of the reinforcement layer, the direction having a high tensile modulus of elasticity in the reinforcement layer is substantially corresponded with the direction having a high rate of size change in the electrolyte layer.

Provided is a carbon nanostructure-metal composite nanoporous film in which a carbon nanostructure-metal composite is coated on one surface or both surfaces of a membrane support having micro- or nano-sized pores. A method for manufacturing a carbon nanostructure-metal composite nanoporous film, includes: dispersing a carbon nanostructure-metal composite in a solvent at the presence of a surfactant and coating the carbon nanostructure-metal composite on one surface or both surfaces of a membrane support; and fusing the metal on the membrane support by heating the coated membrane support. The metal in carbon nanostructure-metal composite nanoporous film melts at a low temperature since a size of a metal of the carbon nanostructure-metal composite is several nm to several-hundred nm.

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.

The invention discloses a waterborne ceramic coated membrane for a lithium ion battery and a preparation method thereof. The waterborne ceramic coated membrane comprises a microporous membrane and a ceramic coating, the ceramic coating is arranged on one side or two sides of the microporous membrane and prepared from, by weight, 40-70 wt% of water and 30-60 wt% of base materials, and the base materials include, by weight, 65-98 parts of boehmite powder, 1-15 parts of waterborne wetting agent, 1-15 parts of waterborne adhesive and 1-5 parts of waterborne dispersant. The waterborne ceramic coated membrane is good in conduction effect and high in thermostability and safety.

The present invention provides for a process to prepare a solid polymer electrolyte membrane having an ionomer having imbibed therein a polymer is selected from the group consisting of a polyamine, a polyvinyl amine, and derivatives thereof, wherein the membrane is irradiated after the impregnation. The invention also provides a catalyst coated membrane and a fuel cell having this solid polymer electrolyte membrane.

The invention belongs to the technical field of composites, and discloses a polyvinylidene fluoride and metal-organic framework composite ultra-filtration membrane and preparation and application. The preparation method comprises the steps that MIL-100 (Fe) prepared through a hydrothermal method is ultrasonically dispersed in solvent, polyvinylidene fluoride and a pore-forming agent are sequentially added, stirring is conducted for 12-24 h to enable the added substances to be dissolved and blended to be uniform, and a membrane casting solution is formed; the membrane casting solution is defoamed and put on a support for membrane coating, staying of a coated membrane in the air is conducted for 30-60 s, the membrane is immersed into a coagulating bath for solvent exchange, and the polyvinylidene fluoride and metal-organic framework composite ultra-filtration membrane is obtained. The metal-organic framework material MIL-100 (Fe) is added to the composite ultra-filtration membrane, the hydrophily of the ultra-filtration membrane is improved, the separating capacity of the membrane is improved, the anti-pollution capacity of the ultra-filtration membrane is improved, the service life of the membrane is prolonged, and a good application prospect is achieved.

The invention relates to a low-temperature heat-sealing high-barrier food packaging film coating latex. The composition points of the mixed monomer of the latex is that vinylidene chloride accounts for 80 to 93 percent of the total amount of the mixed monomer; methyl acrylate, methyl ethyl oxalate, methyl methacrylate, butyl ester, acrylonitrile or methacrylonitrile account for 2 to 10 percent of the total amount of the mixed monomer; itaconic acid, acrylic acid, methacrylic acid account for 0.5 to 5 percent of the total amount of the mixed monomer; the surfactants added are 0.7 portion of SAS and 0.3 portion of sodium dodecyl sulfate; the additive 3 is 0.01 portion of metallic salt. The preparation method includes the following steps: deionized water, surfactant and additive are added in a reactor; the reactor is vacuumized and the gas is replaced by nitrogen gas; the mixed monomer is added. The product of the invention has the advantages of low temperature heat sealing and high barrier performance, and the food using the product has longer shelf life.

A membrane contactor system for removing a component from a gas, comprising a housing defining a gas flow path; a microporous membrane positioned in the housing to allow the gas to flow across the membrane, wherein the membrane comprises a structure of nodes connected by fibrils in which surfaces of the structure of nodes and fibrils define a plurality of interconnecting pores extending through the microporous membrane, wherein the plurality of interconnecting pores are configured to allow the component to diffuse therethrough; and an oleophobic coating disposed on the microporous membrane to form a coated membrane and configured to provide oleophobicity to the coated membrane without blocking the plurality of interconnecting pores.

A process for preparing catalyst coated membranes and membrane electrode assemblies for use in direct methanol fuel cells is provided. Cathode and anode layers are formed by spraying catalyst-containing inks onto a novel framed electrolytic membrane to form a catalyst coated membrane. The spraying process optionally employs one or more masks, which carefully control where the catalyst-containing ink is deposited. Following application of the cathode and anode layers, diffusion layers are prepared and inserted onto the catalyst coated membranes, and pressed to form membrane electrode assemblies.

A twin-wire arc deposition method for depositing a nano-structured catalyst coating onto a solid electrolyte membrane or an electrode substrate from a precursor catalyst material selected from the group consisting of a metal, metal alloy, metal compound, and ceramic material. The method includes the steps of (a) providing an ionized arc nozzle comprising two consumable electrode and a working gas flow to form an ionized arc between the two electrodes, wherein the consumable electrodes provide the precursor catalyst material vaporizable therefrom by the ionized arc; (b) operating the arc nozzle to heat and at least partially vaporize the precursor catalyst material for providing a stream of nanometer-sized vapor clusters of the precursor catalyst material into a chamber in which the membrane or the electrode substrate has been placed; and (c) introducing a stream of a carrier gas into the chamber to impinge upon the stream of precursor vapor clusters to produce depositable nano clusters which are carried by the carrier gas to deposit onto a first side of the membrane or the electrode substrate for forming the nano-structured catalyst coating. Such a catalyst-coated membrane or electrode can be incorporated as a part of a fuel cell.

Disclosed are an electro-catalyst composition and a precursor electro-catalyst composition (e.g., ink or suspension) for use in a fuel cell that exhibits improved power output. The electro-catalyst composition comprises: (a) a catalyst un-supported or supported on an electronically conducting carrier (e.g., carbon black particles); and (b) an ion-conducting and electron-conducting coating material in physical contact with the catalyst and/or coated on a surface of the carrier, wherein the coating material has an electronic conductivity no less than 10⁻⁴ S/cm (preferably no less than 10⁻² S/cm) and an ion conductivity no less than 10⁻⁵ S/cm (preferably no less than 10⁻³ S/cm). Also disclosed are a fuel cell electrode comprising this composition, a membrane-electrode assembly (MEA) comprising this composition, and a fuel cell comprising this composition.

Disclosed are processes for producing a fuel cell electrode and a membrane electrode assembly. In one preferred embodiment, the process comprises (a) preparing a suspension of catalyst particles dispersed in a liquid medium containing a polymer dissolved or dispersed therein; (b) dispensing the suspension onto a primary surface of a substrate selected from an electronically conductive catalyst-backing layer (gas diffuser plate) or a solid electrolyte membrane; and (c) removing the liquid medium to form the electrode that is connected to or integral with the substrate, wherein the polymer is both ion-conductive and electron-conductive with an electronic conductivity no less than 10⁻⁴ S/cm and ionic conductivity no less than 10⁻⁵ S/cm and the polymer forms a coating in physical contact with the catalyst particles or coated on the catalyst particles.

An image projection display system comprises a variable optical property element (1). The element (1) is under direction of a control system (2) and is positioned within an optical system (5), comprising optical elements (5(a, b, c, d, e, f, g)). A source image electronic device (4) receives inputs from a video generation system (7) and is illuminated with light from a photon source (11) filtered by a wavelength-selecting colour wheel (5(b)), under direction of an illumination control system (6). The element 1 comprises a thin Al-coated membrane (150) etched from S^a3N4 (151) mounted via spacers (153) over a substrate (152) having actuator pads (154). Circuits (155) supply various control voltages Electrostatic attraction causes the membrane (150) to deform towards the actuator pads (154) when voltages V1, V2, . . . VN are applied to the actuation channels. The control system (2) receives inputs from the illumination control system (6), the video generation system (J), the source image formation device (4), the mechanical positioning and sensing system (12), and vice-versa.

The present invention provides a hard coat film and a hard coat layer forming composition which forms a hard coat layer adhering well to a substrate, which does not curl up easily and having antifouling properties, excellent abrasion resistance, surface hardness, and a high level of visibility. The present invention has a specific feature in that a hard coat layer forming composition which includes polyfunctional acrylic (or methacrylic) monomer (A), acrylic monomer having a hydroxyl group (B), radical photopolymerization initiator (C), and fluorocompound having a polymerizable group (D) is used. The hard coat film of the present invention has the hard coat layer which is formed by curing the hard coat layer forming composition on a transparent substrate and has a surface free energy less than 20 mN/m and the thickness in the range of 5-25 μm.

Alkaline membrane fuel cells designed with silver cathode catalysts include a catalyst layer comprising silver metal nano-particles and an anion-conducting ionomer. The silver nano-particles are mixed with a solution of the ionomer to form a catalyst ink that is applied to an alkaline membrane to form an ultra-thin cathode catalyst layer on the membrane surface.