12 results about "Fluorinated Polymers" patented technology

Disclosed herein is a battery for generating hydrogen. The battery comprises a working electrode; a reference electrode; a counter electrode; the electrolyte is sulfuric acid with the concentration of about 0.5 M; wherein the working electrode is prepared by coating a layer of ink on a glassy carbon electrode and air-drying the glassy carbon electrode; and the ink is prepared by mixing the TMD composite material decorated by platinum nanoparticles with a solution to form a mixture and carrying out ultrasonic treatment on the mixture, and the solution is composed of water, ethanol and 5% sulfonated tetrafluoroethylidene fluorinated polymer-copolymer dispersion according to a volume ratio of 4: 1: 0.1.

To provide a method for producing a fluorinated polymer, by which the fluorinated polymer can be efficiently produced without using an emulsifier while using an aqueous medium with less environmental burden; an aqueous dispersion; and a solid composition. The method for producing a fluorinated polymer of the present invention is a method for producing a fluorinated polymer, which comprises polymerizing a monomer containing tetrafluoroethylene in an aqueous dispersion containing a first fluorinated polymer having a glass transition temperature of 10° C. or lower and an aqueous medium, to produce a second fluorinated polymer that is different from the first fluorinated polymer; wherein before start of the polymerization of the monomer, the content of the first fluorinated polymer is 0.01 to 4.0 mass % to the total mass of the aqueous dispersion; and before start of the polymerization of the monomer, the concentration of a fluorinated emulsifier is 100 mass ppm or less to the total mass of the first fluorinated polymer of the aqueous dispersion.

The invention discloses conductive polytetrafluoroethylene and a preparation method thereof, a fluorinated graft modified carbon nano tube is used as a conductive filler, and a fluorinated polymer coating layer is introduced into the surface of the carbon nano tube to enhance the interfacial compatibility of the carbon nano tube and a polytetrafluoroethylene matrix. Through in-situ free radical graft polymerization, the carbon nanotubes are uniformly dispersed in a matrix and form a stable conductive network, so that the volume resistivity is significantly reduced, and the conductivity, mechanical properties and thermal stability of the composite material are improved. The method is simple and convenient in process and high in applicability, and the obtained material is excellent in comprehensive performance.

The present invention relates to core-shell particles (or a core-shell particle-type binder), a composition comprising the core-shell particles (or the core-shell particle-type binder), or an electrode manufactured from the composition, the core-shell particles having a perfluorinated resin core, which comprises a perfluorinated polymer, and a resin shell layer, which comprises an acrylic polymer, wherein the core-shell particles are prepared by emulsion-polymerizing an acrylic monomer to the perfluorinated resin core by using, as an emulsifier, a polyethylene glycol ether having an alkyl group of C8 or greater, which is substituted with at least one alkyl of chemical formula 1, and the acrylic monomer comprises (a) methyl methacrylate (MMA), (b) methacrylic acid (MAA) or acrylic acid (AA), and (c) a C2-C6 alkyl (meth)acrylate.

The utility model relates to a novel multi-layer composite fabric which is suitable for protective clothing in high-risk industries such as fire protection, chemical engineering and the like. The fabric comprises a fireproof layer on the outermost layer, a heat insulation layer on the second layer, a chemical-proof layer on the third layer, an inner layer and an antistatic layer. The fireproof layer is made of aramid fibers or carbon fibers, the heat insulation layer is made of aerogel, a silica gel coating or a glass fiber material, the chemical defense layer is made of a polyurethane coating, a fluorinated polymer coating or a polyethylene film, the inner layer is made of polyester or cotton fibers, and the anti-static layers are connected through conductive fibers. All the layers are connected through hot pressing, adhesives and sewing processes, and stability and comfort are ensured. The thickness of the fireproof layer is 0.5-2 mm, the thickness of the heat insulation layer is 0.3-1.5 mm, the thickness of the chemical prevention layer is 0.2-1 mm, the thickness of the inner layer is 0.1-0.5 mm, and the thickness of the antistatic layer is 0.05-0.3 mm. The fabric integrates fireproof, heat-proof, chemical-proof and anti-static functions, provides comprehensive protection, and is suitable for protective clothing in extreme environments.

The invention relates to the field of device packaging, and discloses an electronic device packaging method. The method comprises the following steps: providing a substrate, and preparing an arrayed electronic device on the surface of the substrate; dispensing first glue on an active area of the electronic device, and curing; coating the periphery of the single electronic device with first glue, and curing to form a closed box dam; dispensing second glue outside the box dam; the surface of the electronic device is covered with a water-oxygen barrier film, and packaging is completed; wherein the first glue comprises UV (ultraviolet) glue, and the second glue comprises one of PIB (polyisobutylene) sealant, fluorinated polymer, tetrafluoroethylene-vinyl ether copolymer, TPU (thermoplastic polyurethane) and polyisobutylene diacrylate. According to the embodiment of the invention, a packaging solution which is high in reliability, high in flexibility and capable of realizing mass production is provided for an electronic device through collaborative optimization of an innovative three-level protection framework, a unitized independent packaging design and a material process.

The invention relates to the technical field of aluminum composite board high polymer materials, in particular to an A2-level flame-retardant corrosion-resistant aluminum composite board and a preparation method thereof. The aluminum composite plate is of a three-layer symmetrical structure, and a surface aluminum alloy functional layer is made of an aluminum alloy plate and a PVDF fluorocarbon coating; the core layer is a fluorine-containing polymer flame-retardant layer and is prepared from polyvinylidene fluoride, fluorinated modified aluminum hydroxide and fluororubber; the raw materials of the adhesive layer are epoxy resin, fluorine modified acrylate, a curing agent and deionized water. According to the aluminum composite plate disclosed by the invention, a perfluorinated synergistic system is constructed, and the surface of aluminum hydroxide is modified by using fluorosilane in the core layer, so that the problem of poor compatibility of a high-filling inorganic flame retardant and a polyvinylidene fluoride matrix is solved, and the compactness and corrosion resistance of the material are ensured while A2-level flame retardance is realized. And in cooperation with the fluorine modified epoxy resin adhesive, the surface of inert fluorocarbon is effectively bonded, finally, an all-directional protection structure is formed, and the highest-grade flame retardance and the extreme corrosion resistance which are difficult to achieve by a traditional aluminum composite plate at the same time are synergistically achieved.

The present invention relates to a method for preparing a fluorinated polymer comprising ion exchange groups or precursor groups thereof, said method comprising polymerizing a polymerizable mixture comprising: (i) tetrafluoroethylene, (ii) an ethylenically unsaturated functional monomer having at least one SO2X group, where X is halogen or -OZ group, Z being a hydrogen atom, an ammonium group or an alkali metal atom; and (iii) a redox initiating system comprising at least one reducing agent having one or more sulfinic or sulfinate groups and at least one organic hydroperoxide as oxidizing agent. The present invention also relates to a fluorinated polymer obtained with said method, a membrane comprising said fluorinated polymer, a membrane-electrode assembly comprising said membrane and an electrochemical device comprising said membrane-electrode assembly.

This invention relates to the field of crane technology, and discloses a superhydrophobic anti-corrosion coating and lifting equipment. The superhydrophobic anti-corrosion coating contains a fluorinated multi-component copolymer and fluorinated polymer particles; the weight ratio of the fluorinated multi-component copolymer to the fluorinated polymer particles is 1:0.5-4; the fluorinated multi-component copolymer is a binary copolymer and / or a ternary copolymer, wherein the binary copolymer is a copolymer of vinylidene fluoride and hexafluoropropylene, and the ternary copolymer is a copolymer of vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene; the fluorinated polymer particles are selected from fusible polytetrafluoroethylene, fluorinated ethylene propylene copolymer, polytetrafluoroethylene, polyvinylidene fluoride, polychlorotrifluoroethylene, polyvinylidene fluoride, ethylene-tetrafluoroethylene copolymer, and ethylene-chlorotrifluoroethylene copolymer. This superhydrophobic anti-corrosion coating, using a blend of fluorinated multi-component copolymer and fluorinated polymer particles, improves the superhydrophobic and anti-corrosion properties of the coating.

This invention discloses a highly dispersible carbon nanotube conductive slurry and its preparation method. The conductive slurry is composed of a first polar aprotic solvent, multi-walled carbon nanotubes, a conjugated electron acceptor type intercalation inducing agent, and a cold-state low-viscosity polymeric adhesive. The cold-state adhesive contains fluorinated polymers such as polyvinylidene fluoride (PVDF). During preparation, the solvent, carbon nanotubes, and inducing agent are first heated and held at a constant temperature to achieve charge transfer complexation and pre-loosening; then, the pressure is reduced to allow the solvent to undergo micro-boiling flash evaporation to expand the inter-tube gaps; next, under pressure holding conditions, the cold-state adhesive is injected using a pressure difference, and the local negative pressure generated by condensation and contraction introduces the polymer into the carbon nanotubes to complete electrostatic anchoring; finally, the pressure is restored to normal and homogenized for degassing. This invention achieves non-destructive deep dispersion of carbon nanotubes through the synergistic effect of chemical pre-loosening and hydrodynamic pumping, significantly reducing the apparent viscosity of the slurry and effectively preventing carbon nanotube framework breakage and secondary agglomeration.

Cerium oxide (CeO2) coated silica (SiO2) particles optionally containing the inorganic group -SO2X and a method for the production of such particles. The addition of said cerium oxide (CeO2) coated silica (SiO2) particles to fluorinated polymers containing sulfonic acid functional groups increases their stability against radical decomposition when used in fuel cell or electrolysis applications.

A method for producing a catalyst coating film (25) for an electrochemical cell (25) is proposed. In this method, first, in step (S1), a powdered sulfonated nonfluorinated polymer (1) is prepared. In a further step (S2) of this method, the sulfonated nonfluorinated polymer (1) is dispersed in an anhydrous solvent (3) to form a plastisol (5). Then, in step (S3), a catalyst material (7) is mixed with the plastisol (5) to form a catalyst paste (9). Then, in step (S4), the catalyst paste (9) is applied to a film substrate (11).