37 results about "Perfluoroethylene" patented technology

The invention relates to a fluorine-containing binder for a sulfide all-solid-state battery and a preparation method and application thereof.The binder is formed by copolymerizing isoprene and lithium perfluorovinyl ether sulfonate, specifically, the lithium perfluorovinyl ether sulfonate, a chelating agent, an emulsifying agent, ferrous sulfate, a reducing agent and an acid-base buffering agent are dissolved in water, cooling is conducted in the inert atmosphere, and the fluorine-containing binder for the sulfide all-solid-state battery is obtained. And adding isoprene, an initiator and a molecular weight regulator, and carrying out polymerization reaction to obtain the fluorine-containing binder. The isoprene can enhance the solubility of the lithium perfluorovinyl ether sulfonate fragment in the non-polar solvent, so that the whole polymer is dissolved in the non-polar solvent; the perfluorovinyl ether lithium sulfonate has a large space proportion of fluorocarbon groups, and has a shielding effect on hydrocarbon groups on isoprene, so that the stability of the whole polymer can be improved. The fluorine-containing binder prepared by the preparation method disclosed by the invention is a binder with high elasticity, high ionic conductivity and high stability.

The invention discloses an acid and alkali resistant fiber and a preparation method thereof, and relates to the field of fiber fabrics. When the acid and alkali resistant fiber is prepared, dimethyl terephthalate, polyethylene glycol-2000, ethylene glycol, 1, 3-bis (3-hydroxypropyl)-1, 1, 3, 3-tetramethyldisiloxane and diethyl phosphite are polymerized and then react with 4-vinyl benzoyl chloride and 2-mercaptobenzothiazole in sequence, and modified polyester is prepared; the preparation method comprises the following steps: sequentially reacting microcrystalline cellulose with 3-(chloromethyl)-2-hydroxybenzaldehyde, 4-allylthiosemicarbazide and copper chloride to prepare modified cellulose; the modified cellulose and the modified polyester are mixed and subjected to melt spinning, then perfluoroethylene is used for after-finishing, and the acid and alkali resistant fiber is prepared. The acid and alkali resistant fiber prepared by the invention has durable, flame-retardant and antibacterial capabilities.

[Problem] To provide a sealing material–forming material that can easily reuse a crosslinked perfluoro (co)polymer and that can form a sealing material having a low compression set and having excellent heat resistance and plasma resistance. [Solution] A sealing material–forming material containing a regenerated perfluoro (co)polymer, wherein the regenerated perfluoro (co)polymer is a (co)polymer in which at least a part of a crosslinking site has been regenerated by heat-treating a crosslinked perfluoro (co)polymer obtained by crosslinking a perfluoro (co)polymer having a nitrile group as a crosslinking site, and the perfluoro (co)polymer having a nitrile group contains a structural unit derived from at least one selected from perfluoroolefins and perfluoro vinyl ethers and a structural unit having a nitrile group.

The invention belongs to the technical field of fluorinated ethylene propylene, and particularly relates to a fluorinated ethylene propylene color master batch drying method which comprises the following steps: standing a fluorinated ethylene propylene raw material at low temperature for 20-30 minutes, and then freezing and grinding to obtain fluorinated ethylene propylene refined particles; the fluorinated ethylene propylene refined particles are put into a reaction kettle to be frozen and dried, then soaked into a polyvinylpyrrolidone solution to be subjected to ultrasonic dispersion for 20-40 min, filtered and dried, and coated particles are obtained; the coated particles are put into a reaction kettle to be subjected to constant-temperature negative-pressure standing for 2-3 h, and prefabricated particles are obtained after nitrogen purging; the prefabricated particles are put into ethyl alcohol to be subjected to ultrasonic treatment for 20-30 min, after filtration, ethyl alcohol washing is conducted for 2-3 times, drying is conducted, and the dried fluorinated ethylene propylene color master batch is obtained. The problems that fluorinated ethylene propylene is high in water content and low in drying efficiency are solved, exposed water is removed in the mode that low-temperature freezing grinding is matched with freezing drying, the internal and external pressure difference is formed in the constant-temperature negative-pressure mode, and therefore the effect of releasing water vapor is achieved.

The application provides an anti-fouling polyethylene material and a preparation method thereof. The anti-fouling polyethylene material is prepared from the following components in parts by weight: polyethylene 45-70 parts, perfluoroethylene propylene copolymer 10-20 parts, nano diatomite 5-15 parts, nano titanium dioxide 5-10 parts, nano aluminum nitride 5-10 parts, dispersing agent 0.4 part, lubricant 0.3 part, and antioxidant 0.5 part. The ceramic powder prepared by compounding is used as an additive for preventing fouling and scaling, the hardness and hydrophobicity of the surface of the product are improved, the adsorption and agglomeration of stains of diatomite are combined, and the polyethylene composite material with good surface performance and good anti-fouling performance is obtained.

This invention relates to the field of viscosity measurement technology, and more particularly to a viscosity measuring device and method for poly(perfluoroethylene) propylene resin. The device includes a measuring mechanism connected to an external delivery pipeline, used to detect the viscosity of the resin being transported within the pipeline. The measuring mechanism comprises two coaxial and oppositely arranged main pipes and a driven sleeve located between the two main pipes, the driven sleeve being rotatably connected to the two main pipes. This invention effectively solves the drawbacks of traditional sampling and testing methods, facilitating the integration of testing into the production line, enabling real-time testing of continuously produced resin, improving the immediacy of testing, and allowing for rapid adjustment of resin production parameters based on test results. This avoids the production of large amounts of waste due to delayed test results. Furthermore, by employing multiple methods to detect resin viscosity, it facilitates comparison and verification of test data, improving the accuracy and reliability of the testing.

The invention discloses a medical rubber sealing element with a self-lubricating function and a preparation method of the medical rubber sealing element, and relates to the field of manufacturing of medical rubber sealing elements. The medical rubber sealing element with the self-lubricating function prepared by the invention comprises a rubber compound, a vulcanizing agent and a self-lubricating agent, the rubber compound comprises cross-linked butyl rubber, chlorinated butyl rubber and chlorinated polyethylene rubber; the self-lubricating agent is modified fluorine-containing silicone oil, the cross-linked butyl rubber is prepared from acrylic hyperbranched siloxane and butyl rubber through a reaction, and acrylic hyperbranched siloxane is prepared from o-cresol epoxy acrylic acid, carboxyl-terminated poly (diethylene glycol adipate) and amino-terminated hyperbranched siloxane through a reaction; the modified fluorine-containing silicone oil is prepared by reacting fluorine-containing silane with dimethyl silicone oil and then crosslinking with triallyl isocyanurate, and the fluorine-containing silane is prepared by copolymerizing tetrafluoroethylene and perfluorovinyl ether and then reacting with a silane coupling agent, so that the lubricating property, high temperature resistance and lubricity of the medical rubber sealing element are improved.

This method for producing a fluoropolymer molded body includes heat-treating a molded body that contains a fluoropolymer and a fluorine-containing compound having a hydrophilic group at a temperature lower than the melting point of the fluoropolymer, thereby producing a molded body with the reduced content of the fluorine-containing compound having a hydrophilic group. The molded body contains a fluoropolymer containing at least one fluorine-containing ether monomer unit selected from the group consisting of perfluorovinyl ether units and perfluoroallyl ether units. The fluorine-containing compound having a hydrophilic group is a fluorine-containing compound represented by general formula: [C5F11COO-]M+ (where M+ represents a cation).

This application relates to the technical field of polymer insulating materials, specifically disclosing a corona-resistant polyimide-perfluoroethylene propylene film and its preparation method. The film comprises a polyimide base film and an interface treatment layer, a gradient transition layer, and a functional protective layer sequentially disposed on the polyimide base film. The interface treatment layer is formed by curing an interface treatment slurry. The gradient transition layer comprises the following raw materials in parts by weight: 100 parts of perfluoroethylene propylene dispersion, 30-50 parts of interface treatment slurry, 3-8 parts of leveling agent, 5-10 parts of nanofiller, and 0.5-1.5 parts of latent curing agent. The functional protective layer comprises the following raw materials in parts by weight: 100 parts of perfluoroethylene propylene dispersion, 2-5 parts of hydrophobic fumed silica, 1-3 parts of leveling agent, and 0.1-0.5 parts of antioxidant. This application can improve the interfacial delamination resistance of the polyimide-perfluoroethylene propylene composite film under long-term cyclic stress.

The present invention has an object of providing a fluid sterilization device that can effectively use wide-angle light of ultraviolet light emitted from a light source unit and allows a fluid to stay in an irradiation range of the ultraviolet light even with a quite simple structure. The fluid sterilization device according to the present invention includes a first flow path portion that extends in an axial direction and allows a fluid to pass from a first end to a second end, a light source unit that is connected to the second end of the first flow path portion and irradiates the fluid with ultraviolet light, a second flow path portion that is opposed to the first flow path portion with the light source unit interposed between the first flow path portion and the second flow path portion, and a third flow path portion that is arranged outside of the light source unit in a radial direction and is configured to allow the fluid flowing through the first flow path portion to flow into the second flow path portion. In the fluid sterilization device, the first flow path portion or the light source unit includes a first communication portion that communicates with the third flow path portion, the second flow path portion or the light source unit includes a second communication portion that communicates with the third flow path portion, and the third flow path portion is any of polymers including polytetrafluoroethylene (PTFE), a perfluoroethylene propene copolymer (FEP), perfluoroalkoxyalkane (PFA), and polypropylene (PP). The first communication portion includes a cut-out communication region that is formed by cutting out a part of a connection portion between the first flow path portion and the light source unit.

The invention belongs to the technical field of material science, and relates to preparation and application of a functionalized perfluorovinyl ether copolymer, and a preparation method comprises the following steps: dispersing a functionalized perfluorovinyl ether monomer and a non-fluorovinyl monomer in a solvent under normal pressure, respectively adding an azo thermal initiator or a redox system initiator and an emulsifier, and stirring to obtain a mixture; the functionalized perfluorovinyl ether copolymer is directly prepared. Compared with the prior art, the polymerization method disclosed by the invention avoids severe conditions such as high pressure, perfluorinated solvents and the like or environmental pollution, and is simple and convenient to operate; the tail end of the obtained fluorine-containing copolymer contains a functional group, and the fluorine-containing copolymer can be subjected to SuFEx ''click reaction to construct a high-density fluorinated polymer molecular brush or can be hydrolyzed to prepare a fuel cell proton exchange membrane material.

The present application belongs to the field of fluorine-containing polymer materials, and particularly relates to a polymeric phosphonic resin dispersion liquid, a preparation method and application thereof. The polymeric phosphonic resin dispersion liquid comprises a polymeric phosphonic resin and an organic solvent; the polymeric phosphonic resin is composed of a fluorine-containing olefin unit, a perfluoro vinyl ether phosphonic acid unit, a perfluoro vinyl phosphonic acid unit and a perfluoro olefin sulfonic acid unit. The polymeric phosphonic resin dispersion liquid is uniformly dispersed, and can be used to prepare a perfluoro proton exchange membrane with both sulfonic acid and phosphonic acid proton exchange groups, so that the perfluoro proton exchange membrane has a high ion exchange capacity, is resistant to various chemical media, has high conductivity and proton conductivity, and is very suitable for use in a high-temperature fuel cell or a fuel cell catalyst layer.

The application discloses a kind of aerospace aviation with tin-plated copper core poly perfluoroethylene propylene insulated electric wires and preparation method, it is related to special wire and cable manufacturing technical field.The preparation method includes S1: preparation modified FEP composite material;S2: pretreatment is carried out to extruder;S3: using double-stage decompression type extrusion process, the modified FEP composite material of step S1 is extruded and covered tin-plated copper core forming;S4: using the step cooling mode of partition temperature control to the tin-plated copper core line after covering is cooled.The application is successfully solved the apparent defect problem when FEP high-speed extrusion by the combination technology of " modified formula + vacuum exhaust + step cooling", screw rotation speed can be promoted from traditional <20rpm to 35-50rpm, production efficiency can be improved more than one time, and product surface is smooth, dense, realize high-efficiency defect-free extrusion.

This invention provides a self-generating adhesive bandage, belonging to the field of medical supplies technology. The self-generating adhesive bandage consists of a power-generating layer and a conventional adhesive bandage, including but not limited to an adhesive layer, an absorbent pad, and a separating permeable membrane or release paper. When the self-generating adhesive bandage is continuously rubbed and pressed, the power-generating layer generates a Maxwell pulse electric field and pulsed current under continuous force, accelerating cell regeneration and tissue repair, and promoting wound healing. The power-generating layer can be independently disposed between these layers, or it can be fused with one or more layers. The power-generating layer is composed of membrane materials such as polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), and perfluoroethylene propylene copolymer (FEP), or composites with other materials. The self-generating adhesive bandage can have a multi-layered or interlaced structure, with layers fixed by adhesive bonding or thermoforming. This invention requires no external power source and can generate a Maxwell pulse electric field through simple external force, thereby accelerating cell regeneration and tissue repair, achieving the effect of promoting wound healing, simplifying the operation process, and improving the convenience and safety of use. At the same time, the manufacturing process of this invention is relatively simple and easy to scale up for mass production.

The invention belongs to the technical field of fluorine-containing high-molecular polymers, and particularly relates to a tetrafluoroethylene-based melt-processable perfluorinated copolymer and a preparation method thereof. The perfluorinated copolymer is formed by carrying out ternary polymerization on tetrafluoroethylene, perfluorinated cycloolefin and perfluorinated vinyl ether; wherein the perfluorinated vinyl ether is perfluorinated alkyl vinyl ether or perfluorinated cyclic vinyl ether; the mass percent of the tetrafluoroethylene monomer is 10%-90%, the mass percent of the perfluorocycloolefin monomer is 5%-40%, and the mass percent of the perfluorovinyl ether monomer is 5%-85%. Through selection of functional monomers with different structures and components, the tetrafluoroethylene-based perfluorinated copolymer has the advantages of melt processing, high-speed extrusion, high transparency, low refraction, high product yield and the like on the basis of ensuring the excellent performance of polytetrafluoroethylene, and is wide in application field; the fiber can be widely used in the fields of optical fiber cables, biomedical treatment, electronics, 5G communication and the like.

This application discloses a composite separator, its preparation method, and a battery. The composite separator includes a base film, a first coating, and a second coating. The base film has a first surface and a second surface disposed opposite to each other. The first coating is disposed on the first surface, and the second coating is disposed on the second surface. The first coating includes at least poly(perfluoroethylene propylene), and the second coating includes at least ceramic particles. The first coating provides excellent high safety performance, namely chemical stability and heat resistance, while the second coating improves the mechanical strength and puncture resistance of the separator. Through the synergistic effect of the second coating and the first coating on opposite sides of the base film, the separator has a thermal shrinkage rate of less than 2% at a high temperature of 150°C while maintaining structural integrity.

The invention relates to the technical field of secondary batteries, in particular to a silicon-based negative electrode active material composition, a negative electrode pole piece and a secondary battery. The fluororesin dispersion liquid containing one or more of polytetrafluoroethylene, tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer and perfluoroethylene propylene copolymer is adopted as a binder to bond a silicon-containing material, a conductive agent and graphite together, and hydrophobic coating of the silicon-carbon surface is achieved in the drying process; the problem that the bonding force between the silicon-containing materials and between the silicon-containing materials and the current collector is reduced due to volume expansion in the silicon circulation process is effectively solved, meanwhile, the water absorption of the silicon-containing materials is also improved, and the capacity and the circulation stability of the battery are further improved.

The invention belongs to the technical field of material preparation and polymer synthesis, and particularly relates to a preparation method and application of a perfluorosulfonic acid polymer emulsion. The method comprises the following steps: mixing deionized water subjected to nitrogen introduction deoxidation treatment with a fluorine surfactant to form a reaction medium, adding tetrafluoroethylene (TFE) and perfluoroethylene sulfonyl fluoride alkoxy vinyl ether (PFSA-FVE) as monomers, and carrying out thermal polymerization reaction under controlled pressure and temperature conditions to obtain the fluorine-containing polymer. Therefore, the perfluorosulfonic acid polymer emulsion which is uniform in particle size and stable in dispersion is prepared. The emulsion has a high-polarity sulfonic acid group and can be well fused with a polymer material. In the aspect of application, the surface of a commercial polyethylene (PE) diaphragm subjected to cleaning, drying and plasma activating treatment is coated with the emulsion, and the modified diaphragm with the surface rich in sulfonic acid groups is obtained through drying and curing. The modified diaphragm has higher wettability, polarity site density and interface bonding force, and can be used for improving the ionic conduction performance and electrochemical stability of a polymer solid electrolyte or a composite diaphragm. The method disclosed by the invention is controllable in process, good in dispersity and suitable for large-scale preparation of functional diaphragms, macromolecular electrolytes and related energy storage materials.

The invention discloses a high-temperature-resistant and corrosion-resistant control cable with a composite insulating sheath. The high-temperature-resistant and corrosion-resistant control cable comprises conductors, the insulating layer is coated outside the conductor and is made of a fluorinated ethylene propylene material; and the sheath layer is coated outside the insulating layer and is made of a ceramic silicone rubber material. The control cable comprehensively considers multiple objectives of high temperature resistance, chemical corrosion resistance, high insulation, flexibility, mechanical stress resistance, good flame retardance and the like, can improve stability and reliability of signal transmission in a complex and harsh industrial environment, and meets long-term use requirements under specific working conditions. The invention further discloses a production method of the high-temperature-resistant and corrosion-resistant control cable with the composite insulating sheath. The production method comprises the following steps: S100, preparing the conductor; s200, carrying out insulation extrusion; s300, cabling is carried out; and S400, forming the sheath. Wherein in the rubber material mixing process in the step S400, when the tracking-resistant filler is added, the temperature of the mixed rubber material is controlled between 50 DEG C and 55 DEG C.

The application relates to a high-oxygen-permeability hydrogen-containing fluorosulfonic acid resin and a preparation method and application thereof, and belongs to the technical field of electrolyte materials for fuel cells. The application solves the technical problems of poor oxygen permeability and high cost of fluorosulfonic acid resin in the prior art. The preparation method comprises the following steps: polymerizing a norbornene series monomer A and a perfluorovinyl ether monomer B containing sulfonyl fluoride under the initiation of an iron complex, then soaking the obtained sulfonyl fluoride type fluorosulfonic acid resin in an alkaline solution to hydrolyze the -SO2F group into a -SO3X group, and then soaking the obtained sulfonyl fluoride type fluorosulfonic acid resin in an acidic solution to convert the -SO3X group into a -SO3H group, so as to obtain the hydrogen-containing fluorosulfonic acid resin. The preparation method of the hydrogen-containing fluorosulfonic acid resin has the advantages of mild conditions, simple operation, low production cost, good processability of the obtained hydrogen-containing fluorosulfonic acid resin in general solvents, high conductivity, good oxygen permeability and the like, and the hydrogen-containing fluorosulfonic acid resin can be applied as an electrolyte material of a cathode catalyst layer in a proton exchange membrane fuel cell.

The utility model discloses a low moisture content poly perfluoroethylene propylene color master batch drying treatment equipment, including bottom plate and lifting plate, the outside of bottom plate is provided with lifting plate, the top of lifting plate is installed with support frame, the outside of support frame is provided with support frame, install the cylinder on the lateral wall of support frame, install electric valve on the lateral wall of cylinder, the top of cylinder is installed with servo motor, the output of servo motor is installed with synchronous belt pulley subassembly. The utility model not only realized that the dry processing equipment conveniently carried out the turnover drying to the color master batch, avoided the problem that partial temperature difference was uneven, facilitated the convenient pouring collection of the dry completion color master batch, reduced the labor intensity of artificial, avoided the situation that the inside appeared the group, improved the effect that the dry processing equipment reciprocating movement carried out the drying to the color master batch.

To provide a perfluoropolymer capable of producing an electrolyte membrane excellent in electrical conductivity and mechanical strength under high temperature environment, as well as a liquid composition, a polymer electrolyte membrane, a membrane electrode assembly and a polymer electrolyte fuel cell, obtainable by using the perfluoropolymer. The perfluoropolymer of the present invention contains perfluoromonomer units, does not substantially contain units having a halogen atom other than a fluorine atom, does not substantially contain units having a ring structure, and has acid-type sulfonic acid groups, wherein the perfluoromonomer units contain at least one type of units A selected from the group consisting of perfluoro vinyl ether units and perfluoro allyl ether units; the ion exchange capacity is from 1.4 to 2.5 milliequivalent / gram dry resin; and the storage modulus at 120° C. is at least 60 MPa.

The present application relates to a kind of polymer for sulfide solid electrolyte and its preparation method, application.The preparation method of the polymer of the present application is emulsion polymerization method, lithium perfluoro vinyl ether sulfonate, dodecylfluoroheptyl methacrylate, emulsifier is added to deionized water, heated in butadiene atmosphere, then initiator is added to carry out polymerization reaction, the polymer is obtained, then it is blended with sulfide, and form a kind of polymer sulfide mixed electrolyte.The present application builds effective hydrophobic barrier network in mixed electrolyte by the synergistic effect of fluorinated group contained in lithium perfluoro vinyl ether sulfonate and dodecylfluoroheptyl methacrylate in polymer chain segment.This makes the preparation and short-time operation of mixed electrolyte slurry can be carried out in lower dew point dry room environment, reduces the dependence on strict inert atmosphere protection, thereby greatly reduces the production environment control cost.

The invention provides a preparation method of a fluorinated polyimide micro-powder reinforced perfluoroether elastomer, a perfluoroether elastomer composite material and a preparation method thereof, and belongs to the field of high polymer materials, and the preparation method specifically comprises the following steps: preparing a polyamide acid solution; carrying out thermal imidization reaction on the polyamide acid solution to prepare fluorinated polyimide micro powder; activating the purified fluorinated polyimide micro-powder in an alkaline environment, and carrying out surface grafting reaction on the activated fluorinated polyimide micro-powder and perfluorovinyl ether halide to obtain surface grafting modified fluorinated polyimide micro-powder; and carrying out emulsion copolymerization reaction on the surface-grafted and modified fluorinated polyimide micro-powder to obtain the fluorinated polyimide micro-powder enhanced perfluoroether elastomer emulsion, and a fluorinated polyimide micro-powder enhanced perfluoroether elastomer, a preparation method of the fluorinated polyimide micro-powder enhanced perfluoroether elastomer, a perfluoroether elastomer composite material and a preparation method of the perfluoroether elastomer composite material. According to the treatment scheme, the mechanical property and the high-temperature resistance of the perfluoroether elastomer are remarkably improved, and the perfluoroether elastomer is suitable for high-end applications such as sealing and corrosion-resistant coatings in an extreme environment.

The invention provides a floating body type composite wave energy capturing device based on electromagnetism-triboelectricity, relates to the technical field of wave energy power generation, and effectively solves the problems that an existing wave energy capturing device is single in function, low in energy capturing efficiency, high in installation cost, difficult to popularize and apply and the like. The two ends of the floating body are fixed to the base through the fixing columns and the elastic belts correspondingly, wave energy is converted into kinetic energy of the floating body, and the electromagnetism-triboelectricity composite energy capturing device is driven to generate electric energy output. The electromagnetic energy harvesting structure comprises a magnet, a coil, an electromagnetic energy harvesting module shell and a fixed shaft, the magnet is fixed on the fixed shaft, and the coil is mounted on the electromagnetic energy harvesting module shell, rotates relatively, cuts magnetic induction lines and outputs voltage; the triboelectric energy harvesting structure comprises a triboelectric device, a copper sheet and an elastic belt, the surface of the triboelectric device is pasted with a perfluorinated ethylene propylene copolymer and is fixed on the elastic belt, and when the floating body moves, the triboelectric device is driven to horizontally reciprocate to rub with the copper sheet to output voltage. According to the invention, ocean wave energy can be captured in all directions by using the floating body and electromagnetic-triboelectric composite energy capture; the device can be widely applied to wave energy capture in complex and changeable sea areas, and self-power supply is provided for marine environment monitoring sensors.

The invention provides a fluorine-containing high-corrosion-resistance composite material and application thereof in a wafer clamping device, and relates to the technical field of semiconductors and corrosion-resistant materials. The composite material comprises fluororesin, fluorocarbon modified organic silicon resin and fluorinated carbon fibers, wherein the fluorocarbon modified organic silicon resin is prepared by the following steps: hydrolyzing and neutralizing a siloxane monomer, and then carrying out polymerization reaction on the hydrolyzed and neutralized siloxane monomer, perfluorovinyl ether and 2-methoxy-4-vinylphenol to obtain the fluorocarbon modified organic silicon resin. The composite material has the characteristics of high strength and excellent corrosion resistance, the overall thermal expansion coefficient of the material is reduced, the defect that the size of PTFE is unstable when the temperature change is large is overcome, and the composite material is more suitable for a wafer clamping device, especially a clamping piece.

The invention belongs to the technical field of friction nano-generators, and particularly relates to a friction nano-generator doped with potassium tantalate niobate and a preparation method, the nano-generator comprises a friction pair positive electrode and a friction pair negative electrode, the friction pair positive electrode is made of a polyvinyl alcohol spinning film doped with potassium tantalate niobate, and the friction pair negative electrode is made of a perfluoroethylene propylene polymer. A certain proportion of potassium tantalate niobate is added into a polyvinyl alcohol spinning solution with a certain concentration to prepare a spinning film, and the spinning film and a friction pair perfluorinated ethylene propylene copolymer form S-STENG. The nano generator not only has better mechanical strength, but also has better output performance. The potassium tantalate niobate is a high dielectric material, has high capacitance and strong electric field responsiveness, and can more effectively adsorb and store charges when rubbing with other materials. The KTN has high dielectric strength and can bear a stronger electric field without breakdown. This makes the TENG more stable at high voltage output.

The invention discloses beta-keto perfluorophosphonate vinyl ether and a preparation method thereof, and belongs to the field of fluorine chemical synthesis. The beta-keto perfluorophosphonate vinyl ether has the following structural formula: # imgabs0 #, wherein Et is ethyl. The beta-keto perfluorophosphonate vinyl ether prepared by the method disclosed by the invention not only contains unsaturated double bonds and phosphonate functional groups, but also further activates phosphonate groups by beta-keto with electron-withdrawing activity, so that a new method is provided for preparing perfluorophosphonate resin and fuel cell membrane materials thereof. The invention also provides a method for preparing the beta-keto perfluorophosphonate vinyl ether from the perfluorovinyl ether carboxylate in one step, the reaction conditions are relatively mild, the yield of the beta-keto perfluorophosphonate vinyl ether is high, and the method is easy to industrialize.

The present invention relates to a fluorine-containing binder for sulfide all-solid-state batteries, and its preparation method and application. The binder is copolymerized by isoprene and lithium perfluorovinyl ether sulfonate. Specifically, lithium perfluorovinyl ether sulfonate, a chelating agent, an emulsifier, ferrous sulfate, a reducing agent, and an acid-base buffer are dissolved in water, cooled under an inert atmosphere, and isoprene, an initiator, and a molecular weight regulator are added. A polymerization reaction is performed to obtain the fluorine-containing binder. The isoprene of the present invention can enhance the solubility of the lithium perfluorovinyl ether sulfonate fragment in a non-polar solvent, thereby achieving solubility of the entire polymer in a non-polar solvent; the carbon-fluorine group of lithium perfluorovinyl ether sulfonate has a large spatial occupancy and can shield the hydrocarbon groups on the isoprene, thereby improving the stability of the entire polymer. The fluorine-containing binder prepared by the present invention is a binder with high elasticity, high ionic conductivity, and stability.

The invention provides a high-molecular polymeric material, a square tube for an electronic connector and a manufacturing method of the square tube, and the high-molecular polymeric material comprises the following components in parts by mass: 80-95 parts of fluorinated ethylene propylene; 2-8 parts of a modifier; 1-6 parts of a reinforcing filler; 0.1 to 0.5 part of an antioxidant; and 0.2 to 1.0 part of a lubricant. A square tube body is made of the macromolecular polymeric material, the cross section of the square tube body is rectangular, the ratio of the length to the width of the cross section is 1: 1-3: 1, the arithmetic mean deviation of the surface roughness of the outer wall of the square tube body is smaller than or equal to 0.8 micrometer, and the square tube body is used for the manufacturing process of an electronic connector. A conductive path is provided for the electronic connector. The square tube of the electric connector has the comprehensive advantages of low signal loss, high environment tolerance, strong structure adaptability and the like.