462 results about "Fluoropolymer" patented technology

A disclosed positive electrode is a positive electrode for a nonaqueous electrolyte secondary battery. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer disposed on the positive electrode current collector. The positive electrode mixture layer contains active material particles having an average particle diameter less than 5 μm, a conductive material, a dispersant, and a binder. The active material particles include composite oxide particles and a surface modification layer formed on surfaces of the composite oxide particles and containing a boron compound. The composite oxide particles are particles of a lithium transition metal composite oxide. The conductive material includes a carbon material. The dispersant includes nitrile group-containing rubber. The binder includes a fluorine-containing polymer.

The invention relates to the technical field of batteries, and particularly discloses a composite current collector and a preparation method and application thereof. The composite current collector comprises a thin film substrate, and a phosphorus-containing monomer is introduced into the surface of the thin film substrate through plasma treatment; an aluminum conductive layer disposed on at least one side surface of the film substrate; the surface functional layer is arranged on the surface of one side, far away from the thin film substrate, of the aluminum conducting layer, and the surface functional layer comprises a fluorine-containing polymer layer and a nanotube composite layer which are sequentially arranged from inside to outside. Phosphorus-containing monomers (phosphoric acid groups and ester derivatives thereof) are introduced to a film substrate, oxygen atoms or hydroxyl groups in key functional groups of the phosphoric acid groups and the ester derivatives thereof interact with metal ions strongly to form coordinate bonds to enhance the interface bonding force between an aluminum conductive layer and a PET film, and a surface functional layer is combined to block electrolyte permeation, so that the film has a good anti-corrosion effect. And the nanotubes in the surface functional layer form a three-dimensional conductive network, so that the contact resistance is reduced, and the conductivity is enhanced.

The utility model belongs to the field of diaphragm valves, and particularly relates to an integrated dual-drive controlled fluorine-lined diaphragm valve which comprises a valve body, a valve rod is arranged on the surface of the valve body in a penetrating mode, an operation assembly is arranged at the top of the valve rod, one side of the valve body is fixedly communicated with a connecting pipe, a movable pipe is arranged in an inner cavity of the connecting pipe, and the movable pipe is connected with the valve rod. The right side of the moving pipe extends to the right side of the connecting pipe and is fixedly sleeved with a connecting disc. The operation assembly comprises a rotating box, the bottom of the rotating box is fixedly connected with the valve rod, the top of the rotating box is fixedly connected with a hand wheel, and the surface of the rotating box is sleeved with a fixing shell; by arranging the operation assembly, the inserting rod can be inserted into the inserting hole to fix the rotating box, limiting of the valve rod is achieved, the stability of the valve rod is improved, the valve rod is prevented from rotating, by arranging the adjusting assembly, the using length of the whole valve body can be prolonged by adjusting the moving pipe, and the requirements for different installation space lengths can be met.

The patent discloses a chemical wastewater environmental protection purification device containing fluoropolymers, and belongs to the technical field of wastewater treatment. The chemical wastewater environmental protection purification device containing fluoropolymers comprises a base, an impurity treatment device is assembled at the top right end of the base, the impurity treatment device comprises a device shell, the device shell is fixedly connected to the top of the base, a pneumatic device is assembled on the outer side of the device shell, cavities A and B are formed in the device shell, impurity removal assemblies A are assembled in the cavities A and B, and cavities C and D are formed below the impurity treatment device. The impurity removal assemblies A and the pneumatic device are matched with each other, the motor drives the stirring rod, the rotating plate and the adsorption assembly to realize the sufficient mixing of the wastewater and the flocculant and the diffusion of impurities, the water level and the air flow are automatically controlled through the pneumatic device, the automation degree of the equipment is significantly improved, and the manual intervention demand is reduced.

A cartridge for a vapour generating system such as an e-cigarette includes a layer of mesh disposed across the airflow path, wherein at least a surface of the mesh includes a water-repellent material. The mesh permits the flow of air along the airflow path, while resisting the passage of condensed vapour-generating liquid that might leak from either the air inlet or air outlet. The water-repellent material may be a surface coating of a fluoropolymer such as PTFE or a ceramic nano-coating. Preferably the mesh has an average pore size less than 30 μm. The mesh may be a generally planar sheet supported in a prefabricated cartridge closure assembly, which also defines the air inlet.

Provided is a method for producing particles containing a fluorine-containing polymer, said method being capable of producing particles containing a fluorine-containing polymer having a low content of impurities. This method for producing particles containing a fluorine-containing polymer is a method for producing particles containing a fluorine-containing polymer having a group capable of being converted into an ion exchange group, said method comprising preparing a liquid composition containing a fluorine-containing polymer and a first solvent, then mixing the liquid composition with a second solvent, and aggregating the fluorine-containing polymer, thereby producing particles containing a fluorine-containing polymer having a group capable of being converted into an ion exchange group. The first solvent is an olefin having a fluorine atom and a chlorine atom, and the second solvent is an olefin having a fluorine atom and a chlorine atom.

The application provides a high-flexibility dielectric positive electrode binder and a preparation method thereof and a solid-state battery positive electrode. The high-flexibility dielectric positive electrode binder comprises a fluoropolymer matrix and a fast ion conductor; the fluoropolymer matrix is a copolymer of vinylidene fluoride (VDF) and a fluorine-containing comonomer, the fast ion conductor is in a one-dimensional nanowire shape and is dispersed in the fluoropolymer matrix; and the mass fraction of the fast ion conductor is 1% to 20% based on the fluoropolymer matrix. The application can simultaneously solve three core problems of physical continuity of an ion conduction path in the positive electrode, inhibition of a space charge layer at an interface and mechanical coating of active particles, thereby significantly improving the rate performance, cycle stability and actual energy density of the solid-state battery.

The invention relates to the technical field of wires and cables, and discloses a complex electromagnetic interference resistant, bending resistant, flame retardant and fire resistant control cable. The cable sequentially comprises a composite functional conductor, a flame-retardant fire-resistant insulating layer, a fire-resistant wrapping layer, a composite shielding layer, a low-smoke halogen-free flame-retardant inner sheath, a flexible reinforced shielding layer and a low-smoke halogen-free flame-retardant outer sheath from inside to outside, and the composite shielding layer comprises a metal wire woven shielding layer and a metal belt wrapping shielding layer; the composite functional conductor comprises a conductive metal wire and a functional metal wire; the material of the flame-retardant fire-resistant insulating layer comprises a fluoropolymer material containing an inorganic ceramic filler; the flexible reinforced shielding layer comprises a metal conductive component and high-elasticity fibers; according to the invention, through conductor functional design, fire-resistant mechanism cooperation and multi-layer shielding structure optimization, stable work of the control cable in a complex electromagnetic environment, dynamic bending and fire working conditions is realized.

The invention discloses a high-performance fluorine-containing plastic processing aid. The aid comprises the following components in parts by mass: 90-100 parts of a resin matrix; 0.5 to 5 parts of a fluorine-containing polymer; 1-5 parts of a plasticizer; 0.5 to 3 parts of a lubricant; 0.05 to 0.2 part of an antioxidant; when the fluorine-containing plastic processing aid is added in plastic production, melt fracture can be effectively inhibited, the surface smoothness of a product can be improved, the dispersity of the aid and the compatibility of a matrix can be improved, the processing performance uniformity can be improved, the oxidation resistance of a material can be enhanced, the service life of the product can be prolonged, and the crystal structure can be improved; the mechanical property and the dimensional stability of the product are improved, and the forming processing energy consumption and cost can be obviously reduced.

This invention discloses an enhanced long-life proton exchange membrane for hydrogen production via water electrolysis and its preparation method. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis comprises: a reinforcing material composed of ion exchange fibers, wherein the ion exchange fibers are made of a fluoropolymer with sulfonic acid groups on the side chains; a perfluorosulfonic acid resin, which forms a film on the reinforcing material for gas barrier and proton conduction; and a free radical quencher mixed in the perfluorosulfonic acid resin to capture generated free radicals and improve membrane durability. The thickness of the proton exchange membrane is 50-100 μm. The enhanced long-life proton exchange membrane for hydrogen production via water electrolysis prepared by this invention not only has good conductivity, hydrogen permeability, tensile strength, and water content, but also exhibits better dimensional stability and superior durability.

Provided is a coating composition which has excellent coating properties and which forms a coating film that has good water vapor resistance and corrosion resistance. A coating composition comprising an aqueous dispersion containing a water-soluble polyamideimide resin (P), a polyethersulfone resin (Q), and a fluorine-containing polymer (R) containing a non-melt-processable fluorine-containing polymer (S) and a melt-processable perfluoropolymer (T) having a melting point of 200-350 DEG C, the mass ratio of the water-soluble polyamideimide resin (P) to the polyethersulfone resin (Q) is 10 / 90 to 40 / 60.

The present application relates generally to tubes, such as thin walled catheter liners with small wall thicknesses (e.g., less than 1 mm), including crosslinked fluoropolymers, e.g., crosslinked poly(tetrafluoroethylene). The disclosure further provides methods of manufacturing such tubes and systems for manufacturing such tubes.

Disclosed is a shear stable latex comprising functionalized fluoropolymer, a particle size modifier and a surfactant; said latex having solids content of at least 15 wt %, where the ratio of particle size modifier to surfactant is equal to or greater than 2 on a molar to molar basis.

The invention discloses an inclined screw pump for conveying a viscous corrosive medium, and belongs to the field of conveying pumps. Comprising a pump body, a hopper, a feeding assembly, a pre-leading-in pipeline, a rotor and a stator, the feeding assembly is composed of an arch breaking unit, a propelling unit and a pre-pressing leading-in unit, the arch breaking unit breaks a hopper material arch, the propelling unit achieves stable feeding through a main spiral and a reverse auxiliary spiral, the pre-pressing leading-in unit guides materials into a pump body suction inlet, the rotor is a single-head spiral, and the stator is a stator. A screw pitch transition section is arranged between the inlet section and the outlet section, the outer surface is wear-resistant and corrosion-resistant, and the stator is of an eccentric spiral cavity structure and comprises a first stator metal framework ceramic lining and a second stator fluoropolymer lining. Through structural optimization of the feeding assembly, the rotor and the stator, low-shear, high-abrasion-resistance, high-corrosion-resistance and controllable-flow conveying is achieved, the problems that high-viscosity corrosive media are difficult to feed, shear damage is caused and a pump body is abraded are effectively solved, and the high-shear-resistance and high-corrosion-resistance pump is suitable for the precise coating and glue injection process of a new energy lithium ion battery production line.

The application relates to the technical field of electric wire and cable, and discloses a fluoroplastic insulation high-temperature-resistant fireproof cable and a preparation method, the cable comprises a conductor layer, the conductor layer is twisted by multiple copper wires, the conductor layer is coated with a fluoroplastic insulation layer, the fluoroplastic insulation layer is coated with a shielding layer, the shielding layer is a copper-belt woven structure, the shielding layer is coated with an armor layer, the armor layer is woven by stainless steel wires, the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in mass fractions: functionalized ethylene-tetrafluoroethylene copolymer, 50-70 parts by mass. The application constructs an interpenetrating polymer network formed by in-situ crosslinking of a functionalized fluoropolymer and an organic silicon elastomer in the sheath layer, and adopts an energy field gradient response vulcanization process, so that the prepared cable sheath keeps the inherent high-temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved.

The application discloses a kind of charged hydrophilic polymer porous membrane, its preparation method and application in polysaccharide concentration purification in Chinese herbal medicine, belong to porous membrane technical field.It includes: while the non-solvent phase separation of film-forming polymer solution and the formation of separation layer on the outer surface of polymer membrane, simultaneously coating water-soluble coating layer polymer solution on the surface of separation layer, obtain charged hydrophilic polymer porous membrane;Film-forming polymer solution uses fluorine-containing polymer as film-forming base material, uses nitrogen-containing small molecule as first solvent, uses macromolecular organic matter as pore-forming agent.The application is applied to polysaccharide concentration purification in Chinese herbal medicine, solve the problem that the membrane surface opening rate is low, hydrophilic and poor negative charge of existing non-solvent phase separation technology is not applicable to polysaccharide concentration purification in Chinese herbal medicine, the opening rate of charged hydrophilic polymer porous membrane prepared is high, cutting molecular weight is 10-1000kDa, and can realize membrane forming, improve surface opening rate and surface hydrophilic negative charge modification simultaneously.

This invention discloses a high-strength, hydrophilic PVDF hollow fiber porous membrane with a through-cell honeycomb structure and its preparation method, belonging to the field of membrane separation technology. The technical solution includes: a) preparing a homogeneous spinning solution composed of a fluoropolymer and a diluent; b) simultaneously extruding the spinning solution and core solution through a spinning device, and then introducing the extruded nascent hollow fiber membrane containing the core solution into an external coagulation bath system to complete phase separation, solidification, and stretching; the core solution and / or the external coagulation bath system in step b is a solution containing a hydrophilic agent. This invention proposes a simple, controllable, and effective method to achieve uniform, durable, and non-damaging hydrophilic modification of the inner and outer surfaces of the fiber while preserving the excellent mechanical properties of the PVDF bulk.

The application discloses a fluorine-containing polymer modified single-layer graphene oxide and a preparation method thereof. The graphene oxide is exfoliated into single layers in an organic solvent under ultrasonic assistance and nitrogen protection; meanwhile, a fluorine-containing polymer or a perfluoro acid anhydride containing active reaction end groups is used as a modifier to react with oxygen-containing groups such as hydroxyl groups on the surface of the graphene oxide, so that the fluorine-containing polymer modified single-layer graphene oxide is prepared. The preparation method of the fluorine-containing polymer modified single-layer graphene oxide has the advantages of simple process, complete reaction, mild conditions, controllable product structure and the like. The obtained fluorine-containing polymer modified single-layer graphene oxide can be highly dispersed in various solvents and matrices and keep a good single-layer state, effectively overcomes the problems of easy agglomeration and difficult dispersion of existing (modified) graphene oxides, and can be widely applied to the fields of design and preparation of graphene oxide-based high-performance composite materials and the like.

To provide a water-repellent layer that can be bonded to a catalyst layer with high bonding strength. [Solution] A water-repellent layer for a fuel cell, wherein a bonding material layer containing a fluoropolymer resin or a fluoropolymer electrolyte is formed on at least one surface.

A method includes exposing a composition comprising at least one fluorinated carboxylic acid to at least one degrading agent under conditions effective to decarboxylate at least 10% of the at least one fluorinated carboxylic acid. The at least one fluorinated carboxylic acid is selected from the group consisting of a perfluoroalkyl carboxylic acid, a perfluoroether carboxylic acid, and combinations thereof. A degradation composition includes a fluoropolymer, at least one fluorinated carboxylic acid, and at least one degradation agent.

The application discloses a multilayer composite solid electrolyte, and belongs to the technical field of solid electrolytes. The multilayer composite solid electrolyte is formed by sequentially stacking a positive electrode side functional layer, an intermediate support layer and a negative electrode side functional layer, wherein the positive electrode side functional layer comprises an inorganic solid electrolyte and a fluorine-containing polymer; the intermediate support layer comprises a polymer matrix, a porous material modified with an anion group on the surface and a lithium salt; and the negative electrode side functional layer comprises a polymer with a strong coordination group and a lithium salt. The application allocates different functions to the functional layers with different compositions and structures through gradient functional design of the solid electrolyte, and comprehensively realizes performance balance and balance of ion conductivity, mechanical strength and interface stability by utilizing the synergistic effect.

Organic molecules with free acid groups and a molecular weight of greater than 140 g / mol used in combination with surfactants, are used as processing aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined herein, or can be used with prior art processing aids, depending on the end use application. The novel materials and processes provide a useful alternative to the sole use of fluorine-based polymer processing aids.

The present invention relates to a binder solution for a secondary battery, comprising at least one non-aqueous solvent and at least one fluoropolymer comprising recurring units derived from a) vinylidene difluorides and b) at least one fluorinated olefin monomer containing at least one —SO2X functional group, X being selected from X′ and OM, X′ being selected from the consisting of F, Cl, Br, and I; and M being selected from the group consisting of H, an alkaline metal and NH4, wherein b) the fluorinated olefin monomer is present in an amount from 0.1 to 10.0 mol %, the mol % being relative to the total moles of recurring units; to a solid composite electrolyte comprising at least one fluoropolymer according to the present invention and at least one sulfide-based solid ionic conducting inorganic particle; to a slurry for manufacturing a solid composite electrolyte comprising a binder solution according to the present invention and at least one sulfide-based solid ionic conducting inorganic particle, optionally further comprising at least one electroactive material and / or at least one conductive agent; and to an electrode comprising at least one fluoropolymer according to the present invention and at least one electroactive material, optionally further comprising at least one conductive agent and / or at least one sulfide-based solid ionic conducting inorganic particle. The present invention also relates to a secondary battery comprising a positive electrode, a negative electrode, and a membrane that is positioned between the positive electrode and the negative electrode, wherein at least one of the positive electrode, the negative electrode and the membrane comprises at least one fluoropolymer according to the present invention, optionally further comprising at least one sulfide-based solid ionic conducting inorganic particle, at least one electroactive material and / or at least one conductive agent.

A vent is provided herein for use in a closed container, the vent comprising at least one protective fluoropolymer layer and at least one reinforcing layer, wherein the at least one protective fluoropolymer layer at least partially penetrates into the at least one reinforcing layer, wherein the at least one protective fluoropolymer layer has a carbon dioxide (CO2) to water (H2O) selectivity of at least 600 cm3 / g at 30° C. and a CO2 permeability of at least 1,000 cm3 / (m2*24 h*atm) at 30° C. as measured using methods described herein.

The invention relates to the field of high polymer materials, and discloses a high-temperature-steaming-resistant PE (polyethylene) film and a preparation method of the high-temperature-steaming-resistant PE film. Comprising the following raw materials in parts by weight: 50-60 parts of metallocene polyethylene, 15-20 parts of bio-based polyethylene, 0.8-1.2 parts of dicumyl peroxide, 0.3-0.5 part of a cross-linking agent, 3-4 parts of nano silicon dioxide, 2-3 parts of layered double hydroxides, 0.5-1 part of graphene nanosheets, 8-12 parts of fluorine-containing polymer modified PE resin and 0.8-1 part of an organic tin-rare earth composite heat stabilizer. The shape and strength at high temperature are guaranteed through metallocene polyethylene and bio-based polyethylene, dicumyl peroxide is combined with a cross-linking agent to reinforce heat resistance and size stability, fluorine-containing polymer modified PE resin forms a fluorine-containing protective layer, an organic tin-rare earth composite heat stabilizer inhibits thermal degradation, a composite antioxidant captures free radicals, and the film is prevented from yellowing and embrittling.

The invention belongs to the technical field of fluorine-containing polymer production, and particularly relates to a fluorine-containing olefin continuous polymerization system and a working method. The fluorine-containing olefin continuous polymerization system comprises a monomer conveying unit, a solvent conveying unit, a mixer, a reaction kettle, an additive adding unit, a flash tank and a drying tower, wherein the monomer conveying unit and the solvent conveying unit are used for conveying a monomer and a solvent respectively, mixing the monomer and the solvent through the mixer and inputting the mixture into the reaction kettle from the bottom of the reaction kettle; the auxiliary agent adding unit is used for adding an auxiliary agent into the reaction kettle; the flash tank is communicated with the top of the reaction kettle and is used for receiving mother liquor in the reaction kettle, separating unreacted monomers and polymers in the mother liquor and respectively discharging the unreacted monomers and polymers into the monomer conveying unit and the drying tower; and the drying tower is used for drying and separating the polymer to obtain a product and a solvent. According to the fluorine-containing olefin continuous polymerization system disclosed by the invention, full-liquid-filled kettle type reaction is adopted, and no gas phase space exists in the reaction kettle, so that the accumulation of monomers is reduced, and the explosion risk is sharply reduced. During continuous reaction, the concentrations of fluorine-containing olefin, an initiator and the like in the reaction are fixed, and the reaction temperature, the reaction pressure and the retention time of materials are also fixed, so that the product quality of the polymer is constant and controllable.

Provided is a method for producing a fluoropolymer aqueous dispersion, the method comprising: polymerizing a fluoromonomer in the presence of a fluorine-containing surfactant, a polymerization initiator, and an aqueous medium, thereby preparing an aqueous dispersion containing a fluoropolymer; and bubbling a gas containing oxygen into the aqueous dispersion, or bringing the aqueous dispersion into contact with an oxidizing agent, or bringing the aqueous dispersion into contact with an alcohol, thereby obtaining a fluoropolymer aqueous dispersion.

Provided is a catalyst layer-forming composition capable of forming a catalyst layer in which the occurrence of cracks is suppressed. This composition for forming a catalyst layer contains a fluorine-containing polymer having a unit containing a cyclic ether structure and having an ion exchange group, a catalyst, and a solvent, the solvent containing water and an alcohol, the alcohol containing propanol, the content of water being 50% by mass or more with respect to the total mass of the solvent, and the content of ethanol being 50% by mass or more with respect to the total mass of the solvent. The content of propanol is 50% by mass or more with respect to the total mass of the alcohol.

This invention belongs to the field of responsive material production technology, specifically relating to a high-viscosity fluoropolymer solution and its applications. The preparation method of the high-viscosity fluoropolymer solution is as follows: (meth)acrylate naphthyl ester, fluorinated methacrylate, and vinylcarbazole are dissolved in a solvent and stirred to obtain a clear and transparent solution. Then, an initiator is added, and the mixture is heated to 60-90℃ under magnetic stirring for 16-24 hours to polymerize. After the reaction is completed, a transparent high-viscosity polymer solution with a viscosity range of 800-8000 Pa·s is obtained. After the high-viscosity fluoropolymer solution forms a film on the substrate, it forms an anti-counterfeiting coating that can be stimulated by ultraviolet light and trifluoroacetic acid, exhibiting excellent multi-stimulus responsiveness. The preparation method of this anti-counterfeiting coating is simple, has good film-forming properties, long service life, and low cost. It can be industrially produced and provides dual anti-counterfeiting capabilities, showing great application prospects in anti-counterfeiting, information encryption, and other fields.