1022 results about "Fluoropolymer" patented technology

The invention discloses a scratch repair coating and a preparation method thereof, and relates to the technical field of high polymer materials. When the scratch repair coating is prepared, hydroxylated boron nitride reacts with 1-(3-triethoxysilylpropyl)-2-imidazoline to prepare pre-modified boron nitride, and then the pre-modified boron nitride and 4-chloro-1-butene are subjected to quaternization to prepare modified boron nitride; the preparation method comprises the following steps: reacting styryl phosphonic dichloride with 4, 4, 5, 5, 6, 6, 7, 7, 7-nonafluoro-1, 2-heptanediol to prepare a hydroxyl-terminated phosphorus-fluorine-containing polymer; the preparation method comprises the following steps: reacting isophorone diisocyanate with a hydroxyl-terminated phosphorus and fluorine-containing polymer to prepare a polyurethane prepolymer; reacting the polyurethane prepolymer with hydroxyl-terminated coumarin to generate modified polyurethane; and uniformly mixing the modified polyurethane, the modified boron nitride and a photoinitiator to prepare the scratch repair coating. The scratch repairing coating prepared by the invention has good self-repairing performance, flame retardant property, corrosion resistance and mechanical property.

The invention provides a diaphragm and a battery, the diaphragm comprises a base material layer and a coating layer located on one side surface or two side surfaces of the base material layer, the coating layer comprises a first coating layer and a second coating layer, the first coating layer comprises first particles with the component of an organic compound, and the second coating layer comprises second particles with the component of an organic compound. The unit molecular structure of the organic compound comprises at least one of a carbon-carbon double bond, a phosphorus-oxygen double bond, a carbon-nitrogen double bond, a carbon-sulfur double bond and a carbon-oxygen double bond; the second coating is of a porous structure formed by taking a fluorine-containing polymer as a continuous phase, through holes are formed in the surface of the second coating, and in the 100 [mu] m * 100 [mu] m area of the surface of the second coating, the orthographic projection area of the through holes on the base material layer and / or the first coating accounts for 10%-90% of the surface area of the diaphragm. According to the diaphragm and the battery, the stability of the CEI membrane at high temperature can be improved, the rupture of the CEI membrane is reduced or even avoided, and the high-temperature intermittent cycle capacity retention rate and the recovery capacity retention rate after high-temperature storage of the battery are improved.

The invention belongs to the technical field of polymer composite materials, and particularly relates to an oil-resistant interior material. The material comprises a porous base material layer, a fluorine-containing polymer and organic silicon resin blended oil-resistant functional layer and a micro-nano structure layer with a periodic micro-bulge array, surface modified nanoparticles are distributed in the functional layer in a gradient manner, and the micro-bulge surface is covered with a perfluoropolyether / fluorinated silicon dioxide composite coating; through a synergistic effect of a low-surface-energy oleophobic interface formed through chemical bonding and curing and a micro-structure capillary lifting effect, anti-permeation barrier of high-viscosity grease is realized, and meanwhile, mechanical wear resistance and thermal stability are improved by virtue of a nano-particle enhanced cross-linked network; and continuous imprinting and an ultraviolet-thermal dual-curing process are combined to achieve high-efficiency manufacturing with zero solvent residue, and finally the interior material with long-acting oil resistance, high environmental tolerance and industrial mass production feasibility is obtained.

The invention relates to a preparation method of a hydrophobic and oleophobic PTFE membrane, and belongs to the technical field of PTFE membrane preparation. Aiming at the problems that an existing PTFE membrane is difficult to construct a micro-nano multi-stage coarse structure and has a synergistic effect with low chemical surface energy, the hydrophobic and oleophobic properties are insufficient and the structural stability is poor, the key points of the technical scheme provided by the invention are as follows: firstly, carrying out ethanol ultrasonic cleaning on a PTFE base membrane of 20-30 microns, and carrying out vacuum plasma treatment to form a nano coarse structure and oxygen-containing polar group active sites; then, under the protection of nitrogen, immersing into an ethanol solution containing perfluorodecyltriethoxysilane, dibutyltin dilaurate and nano cellulose whiskers, carrying out hot-pressing compounding with PET non-woven fabric, carrying out heat treatment, and finally, coating with a fluorine-containing polymer nano fiber layer through an electrostatic spinning process; the composite hydrophobic layer with the synergistic effect of a micro-nano multistage coarse structure and chemical low surface energy is formed, the water contact angle is larger than or equal to 155 degrees, and the oil contact angle is larger than or equal to 130 degrees. The PTFE film prepared by the preparation method can be used in the fields of waterproof breathable materials, self-cleaning surfaces, oil-resistant packaging and the like.

The invention provides a single battery, a battery device and a power utilization device, the single battery comprises a laminated electrode assembly, the laminated electrode assembly comprises a positive pole piece, an isolating membrane and a negative pole piece which are laminated, the negative pole piece comprises a negative current collector and a negative membrane layer arranged on at least one side of the negative current collector, the positive pole piece comprises a positive pole current collector and a positive pole film layer arranged on at least one side of the positive pole current collector, the positive pole film layer comprises a positive pole active material, the positive pole active material comprises lithium-containing transition metal phosphate particles, the compaction density of the positive pole piece is 2.25-2.65 g / cm < 3 >, and the lithium-containing transition metal phosphate particles are uniformly distributed on the positive pole piece. In a sphericity-like area cumulative distribution curve of particles obtained by a tangent plane of the positive electrode film layer along the thickness direction of the pole piece, the sphericity-like degree LA50 is 0.70-0.75, the isolation film comprises a base film and coatings arranged on two sides of the base film, and a bonding layer in each coating is a porous structure continuous layer and comprises a fluorine-containing polymer. The battery monomer disclosed by the invention can give consideration to both energy density and cycle performance.

The invention relates to the technical field of electric wires and cables, and discloses a fluoroplastic insulating high-temperature-resistant fireproof cable and a preparation method thereof.The cable comprises a conductor layer, the conductor layer is formed by twisting multiple strands of copper wires, the periphery of the conductor layer is coated with a fluoroplastic insulating layer, the periphery of the fluoroplastic insulating layer is coated with a shielding layer, and the shielding layer is arranged on the periphery of the conductor layer. The shielding layer is of a copper strip braided structure, the periphery of the shielding layer is coated with an armor layer, the armor layer is braided by stainless steel wires, the periphery of the armor layer is coated with a sheath layer, and the sheath layer comprises the following components in parts by mass: 50-70 parts of functionalized ethylene-tetrafluoroethylene copolymer. According to the invention, an interpenetrating polymer network formed by in-situ crosslinking of the functionalized fluoropolymer and the organosilicon elastomer is constructed in the sheath layer, and an energy field gradient response vulcanization process is adopted, so that the prepared cable sheath maintains the inherent high temperature resistance of fluoroplastic, and the flexibility and mechanical strength of the material are improved at the same time.

The application discloses a method for preparing a low-viscosity vinyl fluorine-containing hyperbranched silicone resin and belongs to the technical field of organic polymer materials. The low-viscosity vinyl fluorine-containing hyperbranched silicone resin is prepared from a vinyl-containing siloxane monomer, an alkyl-containing siloxane monomer and a fluorine-containing siloxane monomer as raw materials through hydrolysis nucleation, condensation growth, end capping and purification treatment, wherein the vinyl content is not less than 3 wt%, the fluorine content is not less than 15 wt% and the viscosity is not higher than 1000 mPa.s. The vinyl fluorine-containing hyperbranched silicone resin has excellent properties of both a vinyl silicone resin and a fluorine-containing polymer, the existence of the vinyl group can be suitable for various reaction conditions, the existence of the fluorine-containing group makes the hydrophobic and oleophobic properties excellent, and the friction coefficient of the fluorine-containing polymer material is small, so that the vinyl fluorine-containing hyperbranched silicone resin has great application potential in the fields of oil-resistant sealing, anticorrosion coating, electronic materials, medical devices and the like.

Processing aids and lubricants with free acid groups and relatively high molecular weights are used as process aids in the formation of extrudates and other molded materials. The compositions of this invention can be used as defined, or can be used with prior art processing aids, depending on the end use application. The novel materials and process provide a useful alternative to the sole use of fluorine-based polymer processing aids.

To provide a golf tee having a friction with a golf ball as small as possible without generating unevenness in a contact portion with the golf ball in a placement part of the golf ball, and a manufacturing method of the golf tee.SOLUTION: In a state where a center part in a placement part 120 having a concave curved surface shape on which a golf ball 200 is placed is opened, a cover part 130 formed of a fluorine-containing polymer such as polytetrafluoroethylene is joined so as to cover an upper side peripheral edge of the placement part 120 via an adhesive layer 132.SELECTED DRAWING: Figure 1

The invention relates to a fluorine-containing polymer of a specific mononitroalkylbenzene aromatic hydrocarbon explosive tracer as well as a preparation method and application of the fluorine-containing polymer, and belongs to the technical field of fluorescent probes. The method specifically comprises the step of synthesizing a polymer with fluorine atoms as a solid fluorescence sensor probe. The probe realizes the detection of explosives through the interaction between fluorine atoms and nitryl and by doping CdSe / ZnS quantum dots. Based on the fluorine-containing polymer, aromatic alkyl hydrocarbon explosives (tracers) containing a single nitro group can be specifically recognized. Quantum dots are blended with the fluorine polymer, the quantum dots as a nano material are mixed and dispersed with the polymer to form a nanofiber membrane, and the fluorescence of the fluorine-containing quantum dot polymer is changed by further utilizing the interaction between fluorine and silicon atoms and nitro aromatic hydrocarbon, so that the fluorescence of the fluorine-containing quantum dot polymer is changed. Therefore, the specific detection-fluorescence rise of the mononitroalkane explosive is realized (fluorescence decline caused by interference such as light blocking is avoided).

The invention discloses a high-toughness phenolic resin-based composite refractory plate and a preparation method thereof, and relates to the technical field of high-molecular compound composition refractory plates. The high-toughness phenolic resin-based composite refractory plate is prepared from the following components in parts by mass: 40-65 parts of phenolic resin, 10-25 parts of reinforced fibers, 15-30 parts of a flame retardant, 8-20 parts of inorganic filler, 5-12 parts of a toughening agent, 0.5-3 parts of a coupling agent and 5-10 parts of a stability enhancer. The stability enhancer and phenolic resin are cross-linked to form a three-dimensional network, a multi-path flame suppression mechanism of a fluorine polymer toughening and flame-retardant system is cooperated, and a gradient pressure hot pressing process is combined, so that the mechanical property and flame retardance of the material are synergistically improved. The material has excellent toughness, lasting fire resistance and high-temperature stability, and can be widely applied to the fields of building fire prevention, aerospace and the like.

The invention provides a battery monomer, a battery device and a power utilization device. The battery monomer comprises a laminated electrode assembly and an electrolyte, the laminated electrode assembly comprises a positive pole piece, an isolating membrane and a negative pole piece which are arranged in a laminated manner, the isolating membrane comprises a base membrane and coatings arranged on two sides of the base membrane, each coating comprises a bonding layer, the bonding layer is a continuous layer with a porous structure, and the electrolyte is arranged between the positive pole piece and the negative pole piece. The bonding layer comprises a fluorine-containing polymer; the electrolyte comprises chain carbonate, and based on the total mass of the electrolyte, the mass content of the chain carbonate is 43%-71%. The battery monomer has relatively high energy density and also has a good cycle performance.

The invention discloses a sodium ferric fluorophosphate positive electrode material and a preparation method and application thereof.The preparation method comprises the steps that a sodium source, an iron source, a phosphorus source, a fluorine source and a carbon source are mixed to obtain a precursor, and the carbon source is cellulose acetate; and carrying out heat treatment on the precursor to obtain the sodium ferric fluorophosphate positive electrode material. Cellulose acetate is adopted as a carbon source in battery application, and compared with traditional carbon sources such as graphene and carbon nanotubes, the raw material source is wider, no pretreatment is needed, the production cost is lower, and the method is more suitable for large-scale production and application. The specific surface area of the material is enlarged by introducing cellulose acetate with a proper proportion, the conductivity and the structural stability of the battery are enhanced, and the cycling stability and the rate capability of the battery are further improved.

The present invention relates to the technical field of PPA analysis and detection, and specifically to a method for evaluating a fluoropolymer processing aid (PPA). The PPA evaluation method uses a carbon setting furnace to determine the thermal stability and applicable temperature of PPA, a small extruder to determine the plasticizing properties and applicable resin types of PPA, and a yellowness index meter to determine the effect of PPA on resin color, thereby determining the performance and applicable scope of the fluoropolymer processing aid (PPA). The evaluation method of the present invention can effectively determine the comprehensive performance of a polymer processing aid, as well as its performance, scope, and conditions of use. This provides accurate positioning for PPA product promotion, or enables PPA users to achieve differentiated purchasing and reduce usage costs.

The invention concerns a composition comprising a fluoropolymer, a silicon-sulfur compound, a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, and a solvent or a mixture of solvents and methods for the preparation thereof and for preparing a coated substrate by applying said composition.

The invention relates to a solid electrolyte membrane and a preparation method thereof, and belongs to the technical field of lithium battery solid electrolyte. According to the invention, after the selected acrylate monomer as shown in the formula I is polymerized, the crystallinity of the fluorine-containing polymer is reduced, more space is provided for ion conduction, the dissociation effect of the lithium salt is enhanced, and the free ion concentration is increased; the precipitation-method white carbon black limits anion movement through abundant hydroxyl groups, so that the lithium ion transference number is increased; under the combined action of the three factors, the ionic conductivity of the solid electrolyte membrane is greatly improved. The fluorine-containing polymer has good toughness and self-supporting effect and wide electrochemical window and thermal stability, so that the application range of the solid electrolyte and the energy density, rate capability and service life of a battery using the electrolyte are improved on the whole.

A polymer processing aid (PPA) reduces melt defects in extruded polyolefins in the absence of fluoropolymers. A polymer processing aid comprising a block copolymer having polyamide blocks and polyether blocks reduces melt defects well in a thermoplastic polyolefin such as a linear low density polyethylene (LLDPE). Inclusion of an adjuvant PPA comprised of polycaprolactone, or polycaprolactone diol polymer further improves the melt fracture behavior in a thermoplastic and in the absence of fluoropolymers.

The invention provides a medical device comprising a fluoropolymer surface comprising at least one hyaluronic acid species.

The present invention discloses the manufacture of a porous fluoropolymer membrane comprising a blend of N-butylpyrrolidone and a co-solvent derived from lactic acid wherein the content of N-butylpyrrolidone in the solvent system is at least 50% or more.

The invention relates to the technical field of copper-clad plate preparation, in particular to a preparation method of a high-frequency flexible copper-clad plate. The preparation method comprises the following steps: taking a mixture of a trifluorochlor oethylene-vinyl ether fluororesin emulsion and a tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer emulsion as a fluorine-containing emulsion matrix, then adding isopropanol polycarbonate to prepare a composite emulsion, coating two surfaces of a PI film with the composite emulsion to prepare a fluorine-containing polymer layer, and finally preparing the fluorine-containing polymer layer. The fluorine-containing polymer layer has an interface bonding effect, the modified PTFE layer has the effects of reducing dielectric loss and enhancing stability, and the fluorine-containing polymer layer and the modified PTFE layer have a synergistic effect, so that the high-frequency flexible copper-clad plate is prepared. Therefore, the prepared high-frequency copper-clad plate has excellent high-frequency dielectric property, high-strength interface bonding property and excellent mechanical and dimensional stability.

The invention relates to a fluoropolymer coating composition that can be used, for example, in coating electrodes and / or separators in electrochemical devices. The fluoropolymer coating composition preferably contains multiple fluoropolymer phases. The coated electrodes and / or separators have both excellent wet adhesion, excellent dry adhesion, and low leachables. Each of the fluoropolymer phases contains polymers having at least 10 weight percent, of a common fluoromonomer, making the polymer phases compatible with each other, and allowing for the phases to be distributed fairly homogeneously on a macroscopic level throughout the composition and dried coating formed from the composition.

This binder for an electrode comprises a solid composition including primary particles containing a first polymer and a second polymer, wherein the second polymer is a non-melt-moldable fluorine-containing polymer containing a unit based on tetrafluoroethylene, the first polymer is different from the second polymer, and the content of the first polymer is 0.01-4.0 mass% with respect to the total mass of the first polymer and the second polymer.

The invention discloses a silicon-based negative electrode material and a preparation method thereof, a negative electrode plate and a preparation method thereof, a solid-state battery and an electric device, and relates to the technical field of batteries, the silicon-based negative electrode material comprises a silicon-based active substance, a fluorine-containing composite binder and a conductive agent, the fluorine-containing composite binder comprises a fluorine-containing copolymer and a fluorine-containing polymer; the fluorine content of the fluorine-containing copolymer is greater than or equal to 60%; and the elastic modulus of the fluorine-containing composite binder is 1.0 to 1.2 GPa. The fluorine content of the fluorine-containing copolymer is greater than or equal to 60%, and the fluorine-containing copolymer and F <-> in the electrolyte form a compact interface layer, so that electrolyte permeation can be inhibited, and the interface stability is improved. The elastic modulus of the fluorine-containing composite binder is 1.0-1.2 GPa, the fluorine-containing composite binder is matched with the expansion stress of the silicon-based active material, elastic buffer can be provided for the silicon-based negative electrode material, the expansion stress of the silicon-based negative electrode can be uniformly dispersed by forming a three-dimensional elastic cross-linked network, the generation of cracks is reduced, the fracture of a transmission channel is reduced, and the ion transmission performance is improved.

The present invention relates to a gas diffusion layer for a fuel cell, comprising a microporous layer with a polymeric binder which is free of fluorine or has a lower proportion of fluorine-containing polymer compared to conventional binders, a gas diffusion layer obtainable using the method, and a method for producing a gas diffusion layer for a fuel cell, the gas diffusion layer comprising a microporous layer comprising a microporous layer having a polymeric binder which is free of fluorine or has a lower proportion of fluorine-containing polymer compared to conventional binders. And a fuel cell comprising such a gas diffusion layer.

The invention concerns a monolayer comprising a fluoropolymer, a silicon-sulfur compound, and a vinyl polymer consisting in carbon and hydrogen atoms, and optionally oxygen and / or nitrogen atoms, an assembly comprising a substrate and said monolayer, a method for preparing said monolayer, a component comprising said monolayer and a device comprising said component.

The invention relates to the field of lithium ion batteries, in particular to a fluorine-containing polymer electrolyte of a lithium ion battery, which is applied to working at room temperature and high temperature, and the gel electrolyte is composed of a fluorine-containing polymer chain segment, a lithium salt, a solvent and an initiator; the preparation method comprises the following steps: fully mixing a solvent and a lithium salt, adding the fluorine-containing polymer chain segment, and uniformly stirring to obtain a fluorine-containing polymer electrolyte precursor solution; the lithium ion battery has the advantages that an additional path is provided for Li < + > transmission by adding the fluorine-containing polymer chain segment, and an electrolyte is allowed to be matched with lithium ions, so that rapid migration of the lithium ions is promoted through weak coordination with the polymer chain segment, further, the Li anode is more easily and effectively stabilized by forming a uniform SEI layer rich in LiF, and the interface stability is improved; the electrochemical performance of the lithium battery at room temperature is ensured, and the cyclicity at high temperature is improved.

The invention relates to a negative electrode slurry and a preparation method thereof, a negative plate and a lithium ion battery, the negative electrode slurry mainly comprises a negative electrode active material, a binder composition, a conductive agent and a negative electrode additive, the mass ratio of the binder composition to the negative electrode additive is 2.0-2.4: 1.0-2.0, the binder composition comprises a component A, a component B and a component C, the component A is a fluorine-containing polymer, the component C is a fluorine-containing polymer, and the component B is a fluorine-containing polymer. The component B comprises a carboxylic acid compound, the component C is carboxymethyl cellulose salt, the negative electrode additive is alkali metal fluoride salt and / or alkaline earth metal fluoride salt, the pH value of the negative electrode slurry is 6.5-7.5, and the viscosity of the negative electrode slurry is 1000-4000 mpas. The negative electrode slurry disclosed by the invention has good dispersity and stability, and the prepared negative electrode plate can effectively relieve volume expansion of silicon, so that the rate capability, the cycling stability, the coulombic efficiency and the battery safety of the lithium ion battery can be effectively improved, and the consistency of the lithium ion battery is improved.

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 invention relates to a process for preparing a fluoropolymer in a liquid reaction medium, the process comprising the steps of:-providing a reactor containing a liquid reaction medium comprising water,-introducing into said reactor an ethylene monomer and a fluorinated monomer selected from tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE) or mixtures thereof, the invention relates to a method for producing a fluorinated surfactant, comprising the steps of:-adding a reaction medium to a reactor,-pressurizing the reactor,-feeding a redox initiator into the reactor to initiate polymerization, the redox initiator comprising an oxidizing agent and a reducing agent, where the reducing agent in the redox initiator does not contain sulfur atoms having an oxidation number of 4 or less, and where the reaction medium does not contain a fluorinated surfactant.