85 results about "Perfluoroether" patented technology

The invention provides a method for decomposing and mineralizing fluorine-containing organic matter wastewater, which is applied to the technical field of treatment of fluorine-containing organic matter wastewater generated in a perfluoroether elastomer emulsion flocculation process, and comprises the following steps: S1, carrying out adsorption and desorption treatment on the fluorine-containing organic matter wastewater to obtain a concentrated solution of the fluorine-containing organic matter wastewater; s2, hydrogen peroxide and ferrous ions are added into a container containing the concentrated solution to obtain a mixed solution, the pH of the mixed solution is adjusted to be 2-4, the concentration mass ratio of the hydrogen peroxide to organic matter contained in the fluorine-containing organic matter wastewater is 1: 1-2, the molar ratio of the hydrogen peroxide to the ferrous ions is 1-6: 1, micro-nano bubbles are introduced into the mixed solution, and ultrasonic treatment is conducted; s3, calcium hydroxide is added into the treated mixed solution, calcium fluoride precipitates are obtained through centrifugal treatment, and the fluorine-containing organic matter in the wastewater can be degraded and mineralized.

The invention provides a metal plate frame and fluororubber sealing assembly and a preparation method thereof, and the preparation method is applied to the technical field of semiconductor sealing and comprises the steps that S1, a metal plate frame is coated with an adhesive, dried and then cooled, and the adhesive is a trithiocyanuric acid derivative solution; s2, a cross-linking agent and an addition agent are added in the thin-passing mixing process of the perfluoroether elastomer, a mixed rubber compound is obtained, the addition agent comprises fluorinated silicon dioxide, fluorinated titanium dioxide or PFA micro powder, and the mass of the addition agent is 2-10% of the mass of the perfluoroether elastomer; and S3, the mixed rubber sheet is placed in a metal plate frame, the metal plate frame with the mixed rubber sheet is placed in a mold to be subjected to hot pressing vulcanization forming, then secondary vulcanization is conducted, then radiation vulcanization is conducted, and the assembly is obtained. The assembly prepared through the method is resistant to plasma etching and high in cleanliness, the bonding performance of the perfluoroether rubber and the metal plate frame is good, and the rate of finished products is high.

The invention discloses a high-purity plasma-corrosion-resistant perfluoroether rubber material which comprises the following components in parts by mass: 100 parts of perfluoroether rubber; 10-20 parts of an organic polymer filler; 0.5-3 parts of a vulcanizing agent; and 1-4 parts of an assistant vulcanizing agent. The invention also provides a preparation method of the rubber material. The preparation method comprises the following steps: preparing a perfluoroether rubber compound and thermally vulcanizing the perfluoroether rubber. The prepared high-purity perfluoroether rubber material is excellent in high-temperature resistance, good in plasma etching resistance and extremely low in metal ion precipitation amount, and has important guiding significance on development of sealing materials.

The utility model discloses an optical path adjustable flow cell which comprises a flow cell cavity, two adjusting seats are oppositely arranged in the flow cell cavity, the two adjusting seats are both in threaded connection with the flow cell cavity, lenses are arranged at the opposite ends of the two adjusting seats, compression screws are arranged on the opposite sides, facing the flow cell cavity, of the lenses, and the compression screws are in threaded connection with the flow cell cavity. A connector is arranged at the tail end of the adjusting seat; the optical path adjusting device is simple in structure and reasonable in design, rotary fine adjustment of the optical path is achieved through threaded connection of the adjusting base and the flow cell cavity, the optical path can be adjusted without disassembling and assembling the flow cell, and convenience of experimental operation is improved. The lens and the cavity are directly matched and installed, the parallelism of the lens is ensured, and the detection precision is improved. In addition, a perfluoroether O-shaped sealing ring is adopted, so that the sealing performance is better, the corrosion resistance and the pressure resistance are stronger, and the stability and the reliability of equipment in a complex environment are ensured.

The utility model belongs to the technical field of rubber synthesis processing, and particularly relates to a low-temperature-resistant perfluoroether rubber synthesis device which comprises a reaction kettle main body and a stirring motor, the stirring motor is fixedly mounted at the top of the reaction kettle main body, and a stirring mechanism is arranged in the reaction kettle main body; the stirring mechanism comprises a sleeve, an annular groove, a rotating rod, a sliding column, a convex block, a stirring rod and stirring blades, the sleeve is fixedly connected to the top of the inner wall of the reaction kettle main body, the annular groove is formed in the inner wall of the sleeve, one end of the rotating rod is fixedly connected to the output end of the bottom of the stirring motor, and the other end of the rotating rod penetrates through the interior of the sleeve; the surface of the rotating rod is sleeved with the sliding column. The utility model provides a low-temperature-resistant perfluoroether rubber synthesis device, which can increase the fluidity of raw materials during stirring by moving the stirring rod up and down, ensure that all the raw materials can be effectively stirred, enable the raw materials to be uniformly heated and improve the synthesis rate of the raw materials.

The invention discloses a triazine perfluoroether rubber secondary vulcanization atmosphere control method and a product thereof, the triazine perfluoroether rubber secondary vulcanization atmosphere control method comprises the following steps: S1, triazine perfluoroether rubber subjected to primary vulcanization is subjected to secondary vulcanization in an inert gas atmosphere, the moisture content in the inert gas atmosphere is less than 20 ppmv, and the product is subjected to secondary vulcanization; the vulcanization temperature is 275 to 295 DEG C; and S2, replacement air is introduced, passivation is conducted in the air atmosphere, then the triazine perfluoroether rubber product is obtained, and the passivation temperature ranges from 275 DEG C to 295 DEG C. The method solves the problem of unstable product performance caused by improper atmosphere control in the secondary vulcanization process of the triazine perfluoroether rubber, the compression deformation rate of the perfluoroether rubber product prepared by the method is less than or equal to 10%, and the perfluoroether rubber product can be used in the high-end sealing fields of semiconductors, aerospace and the like.

The utility model relates to the field of fire hoses, in particular to a composite puncture-resistant fire hose. The technical problem to be solved by the utility model is to provide a high-strength pressure bearing, chemical erosion resistance, efficient heat insulation, long-acting wear resistance and multi-stage puncture resistance; and reliable guarantee is provided for a complex fire scene environment. A composite puncture-resistant fire hose comprises a fire hose body and connecting buckles fixedly connected to the two ends of the fire hose body. The fire hose main body comprises a chemical corrosion resistant layer which is positioned on the innermost side and is made of perfluoroether rubber; a pressure-bearing lining layer is fixedly adhered to the outer side of the chemical corrosion resistant layer; and the pressure-bearing lining layer is made of a thermoplastic polyurethane material. According to the utility model, high-strength pressure bearing, chemical erosion resistance, efficient heat insulation, long-acting wear resistance and multi-stage puncture resistance are achieved; and a reliable guarantee is provided for a complex fire scene environment.

The invention discloses a method for polymerizing a perfluoroether elastomer in supercritical carbon dioxide, the perfluoroether elastomer prepared by the method and a composition, the method comprises the following steps: adding carbon dioxide, a perfluoromethyl vinyl ether monomer and a tetrafluoroethylene monomer into a reactor, the carbon dioxide concentration in the reactor being greater than or equal to 30 mol%; and continuously adding the initiator, the chain transfer agent and the vulcanization point monomer to initiate the polymerization reaction of the perfluoroether elastomer. The reactor adopts a jacketed heat exchanger, combines spraying of a liquid tetrafluoroethylene monomer and perfluoromethyl vinyl ether and carbon dioxide reflux to supplement cold energy, utilizes latent heat of vaporization to absorb heat released by polymerization reaction, and controls the reaction temperature to be 35-125 DEG C. The perfluoroether elastomer prepared by the method has good thermal stability, and is suitable for industrial production. The preparation method has the advantages of simple process, chemical corrosion resistance and low fluorine ion extraction degree, and the temperature in the preparation process is accurately controlled, so that unstable end groups of the obtained perfluoroether elastomer are greatly reduced, and various physical properties of the elastomer are favorably improved.

The utility model relates to the technical field of cable end protective sleeves, and discloses a high-sealing insulated cable end protective sleeve, which comprises fixing rings for contraction and fixation, connecting rings are fixedly connected to the opposite ends of the fixing rings, adjusting rings are rotatably connected to the opposite ends of the connecting rings, and the adjusting rings are rotatably connected to the fixing rings. The inner wall of the adjusting ring is connected with a transmission screw rod through a gear set, the opposite ends of the fixing rings are fixedly connected with a plurality of sliding groove pipes, the outer wall of the transmission screw rod is connected with a supporting plate through a supporting set, the sheath body is used for preventing corrosion, and the outermost layer of the sheath body is provided with a perfluoroether rubber protection layer. And a ceramic silicone rubber flame-retardant layer is arranged on the inner side of the perfluoroether rubber protective layer. According to the utility model, firm fixation of the sheath body between cable ends is ensured, loosening or falling in the use process is prevented, and extreme environment tolerance, uniform stress distribution, heat management optimization and protection reliability improvement are realized.

The invention provides a corrosion-resistant fluoroether rubber polymer material, a preparation method thereof and an application of the corrosion-resistant fluoroether rubber polymer material in an airbag pump. Relates to the technical field of air bag pump component materials. The corrosion-resistant fluoroether rubber polymer material comprises 100-130 parts of a modified perfluoroether rubber polymer, 20-30 parts of a filler, 1-3 parts of a cross-linking agent, 2-5 parts of an accelerant, 3-10 parts of a functional aid and 5-10 parts of an acid acceptor, wherein the modified fluoroether rubber polymer is 6-perfluorobutyl UPy (at) POSS (Polyhedral Oligomeric Silsesquioxane) grafted PPS (Polyphenylene Sulfide) fiber reinforced perfluoroether rubber. The corrosion-resistant fluoroether rubber polymer material disclosed by the invention can be applied to a rubber part of an air bag pump, and the corrosion resistance, the mechanical strength and the wear resistance of the rubber part at high temperature are improved.

This invention belongs to the field of polymer composite materials technology, specifically relating to a self-lubricating polyimide resin based on a perfluoroether bond network and carbon dot reinforcement, its preparation method, and applications. The invention involves mixing carboxyl-functionalized carbon dots, an ether-containing aromatic diamine, and a polar aprotic solvent to obtain a carbon dot-diamine pre-assembled system, which is then polymerized with a perfluoroaromatic dianhydride to obtain a linear polyamic acid solution. This linear polyamic acid solution is then reacted with a phenylacetylene-containing active end-capping agent to obtain a polyamic acid solution with a three-dimensional network structure. Finally, the polyamic acid solution with the three-dimensional network structure is cured in a protective gas atmosphere to obtain a self-lubricating polyimide resin. The self-lubricating polyimide resin provided by this invention achieves a synergistic improvement in load-bearing capacity, wear resistance, and structural stability under high temperature and high load conditions, and can be widely applied in aerospace high-temperature bearings, high-load sealing rings, wear-resistant coatings for extreme conditions, and high-temperature sliding components.

The invention relates to the technical field, and discloses a preparation process of a perfluoroether elastomer, which comprises the perfluoroether elastomer. The perfluoroether elastomer is prepared through ternary polymerization of 1, 1-difluoroethylene (VDF), perfluoromethyl vinyl ether (PMVE) and 3-hydroxy-2-trifluoromethyl propionic acid (MAF-OH), a self-made hydroxyl-containing third monomer MAF-OH is introduced, a polar group is successfully introduced into a fluoroelastomer molecular chain, and the polarity and compatibility of a polymer are effectively improved; the prepared perfluoroether elastomer is white powder, has excellent elasticity, high temperature resistance and chemical medium resistance, and has wide application prospects in the fields of preparation of high-end sealing materials, gaskets, rubber tubes and the like.

In order to overcome the problem that solvent-resistant peroxide-vulcanized perfluoroether rubber products are difficult to be used at high temperature above 310 DEG C for a long time and have poor heat resistance, a method for preparing perfluoroether rubber by soap-free emulsion polymerization is provided, comprising the following steps: mixing deionized water, a first monomer and a pH regulator to obtain a mixed liquid; heating the mixed liquid to a reaction temperature, introducing a second monomer and a third monomer into the mixed liquid to a reaction pressure, adding an initiator into the mixed liquid to carry out a polymerization reaction, and obtaining an emulsion after the reaction, and obtaining perfluoroether rubber through post-treatment of the emulsion; the first monomer is a compound shown in formula 1, CF2=CFO(CF2)nCOOH, formula 1, wherein n is an integer of 1-4; the second monomer is tetrafluoroethylene, and the third monomer is perfluoroalkyl vinyl ether. The perfluoroether rubber prepared by the method provided in the application can be vulcanized by peroxide without using a cross-linking aid, and solvent-resistant perfluoroether rubber products with superior heat resistance are obtained.

The invention discloses an electronic liquid seal flame-retardant material and application thereof, the material comprises a fluorine-containing polymer, a rheology modifier and a functional nano-material in a mass ratio of (70-99.5): (0-20): (0-10); wherein the fluorine-containing compound is one or more of perfluoroether, perfluoroamine, perfluoroketone and hydrofluoroether; the rheology modifier is one or more of polytetrafluoroethylene, fatty acid, fatty acid salt, polyurea and hydrocarbon wax; the functional nano material is one or more of silicon oxide, aluminum oxide, aluminum hydroxide, magnesium hydroxide, hydrotalcite, clay and calcium carbonate. When the electronic liquid seal flame-retardant material is used for liquid seal of electronic devices and systems, flame-retardant and explosion-proof effects can be achieved.

A fluoropolymer is described comprising pendent groups having the formula: —(CF2)a—(OCbF2b)c—(OCeF2e)—SO2—[NX2—SO2(CF2)f—SO2]d—NX1—SO2—Rf wherein Rf is a perfluoroether and X1 and X2 are independently cationic counterions. Also described are various articles including catalyst ink, polymer electrolyte membranes, and membrane electrode assemblies comprising the fluoropolymer described herein; as well as a method of making a fluoropolymer.

The invention relates to a variable temperature Hall effect measuring clamp which comprises a clamp body, a rectangular plate is arranged at one end of the clamp body, four adjusting assemblies are evenly arranged on the rectangular plate, each adjusting assembly comprises a clamping plate, a locking pressing ring, an adjusting groove, adjusting columns and a limiting ring, and the four adjusting columns are rotationally connected to the clamp body. And a locking pressing ring is arranged at the top of the adjusting column. According to the low-temperature compensation mechanism, expansion compensation is achieved at the low temperature through the low-temperature compensation assembly by means of the characteristics of ZrW2O8 low-temperature volume expansion materials and perfluoroether rubber, gaps generated by cold contraction of other assemblies are filled, the locking pressure of the clamping plate and the adjusting column is kept, and the clamping stability is ensured.

The invention relates to a paper deacidification liquid and a preparation method thereof, the paper deacidification liquid comprises a fluorocarbon deacidification liquid and an alkaline deacidification substance, the fluorocarbon deacidification liquid comprises, by volume, 1-10% of perfluoropolyether, 10-30% of a perfluoroether solvent and 60-89% of perfluorohexanone, and the ratio of the mass of the alkaline deacidification substance to the volume of the fluorocarbon solvent is 0.1-10 g / L. According to the fluorine-containing paper deacidification liquid, a synergistic effect is generated by virtue of opposite electrostatic potentials of perfluoroether and perfluoroketone, a steric hindrance effect is formed by virtue of perfluoropolyether with a long molecular chain, and the fluorine-containing paper deacidification liquid with high-stability suspension dispersion is obtained without depending on perfluorocarboxylate and perfluorosilane surfactants. The pH value and the alkali storage capacity of the treated paper are remarkably improved, meanwhile, the paper cannot be wrinkled and adhered, and the color difference, the tensile strength and the handwriting change of the paper are not obvious. The adopted fluorine-containing solvent is high in inertia, rapid in volatilization, low in price and suitable for large-scale paper deacidification treatment.

The present application relates to the technical field of fluororubber foaming composition, in particular to an environment-friendly fluororubber foaming composition for heater, a preparation method and application. The environment-friendly fluororubber foaming composition for heater is prepared from raw materials including perfluoroether rubber, amidine salt compound and metal hydroxide. The obtained environment-friendly fluororubber foaming composition for heater can be vulcanized and foamed during heating, and the foaming and vulcanization are carried out simultaneously, without the need to add new crosslinking agent. The foaming gas generated by foaming is H2O, which is environment-friendly. The present application belongs to the environment-friendly fluororubber foaming composition for heater.

The utility model discloses a high-strength high-temperature-resistant heat-shrinkable tube, which belongs to the technical field of heat-shrinkable tubes and comprises a heat-shrinkable outer tube and a heat-shrinkable inner tube, the heat-shrinkable outer tube is fixedly sleeved outside the heat-shrinkable inner tube, the outer surface of the heat-shrinkable outer tube is fixedly connected with an outer reinforcing layer, the outer surface of the outer reinforcing layer is fixedly connected with a perfluoroether rubber layer, and the perfluoroether rubber layer is fixedly connected with the heat-shrinkable outer tube. The outer surface of the perfluoroether rubber layer is fixedly connected with a corrosion-resistant layer, the inner surface of the heat-shrinkable inner tube is fixedly connected with a heat-insulating layer, and the inner surface of the heat-insulating layer is fixedly connected with a high-temperature-resistant ceramic layer. Through the arrangement of the perfluoroether rubber layer and the high-temperature-resistant ceramic layer, the high-temperature-resistant performance of the heat-shrinkable tube can be improved, the heat-shrinkable tube is not prone to being damaged in a high-temperature environment, through the arrangement of the outer reinforcing layer, the structural strength of the heat-shrinkable outer tube can be improved, the heat-shrinkable outer tube is not prone to being damaged due to stress, and through the arrangement of the corrosion-resistant layer, the service life of the heat-shrinkable tube is prolonged. The corrosion resistance of the heat-shrinkable outer tube can be improved, and the service life is prolonged.

The invention relates to the technical field of deposition devices, in particular to a rapid deposition device for a drill bit hard coating and a using method thereof.The rapid deposition device comprises a deposition device assembly, a support assembly is installed on the inner side of the deposition device assembly, a drill bit body is inserted into the inner side of the support assembly, and an assembly heat preservation box assembly is fixedly connected to the position, close to the lower end, of the deposition device assembly; a pushing assembly and a rotation driving assembly are installed on the inner side of the heat preservation box assembly, the pushing assembly comprises an electric cylinder, the tail end of a piston rod of the electric cylinder is fixedly connected with a solid disc, the outer side of the solid disc is fixedly connected with a first perfluoroether rubber sealing ring, and the top end of the solid disc is fixedly connected with a spring. According to the device, energy waste caused by repeated heating and cooling of the whole hearth is avoided, the waiting time is greatly shortened, the working environment of operators is improved, and the somatosensory comfort degree is improved.

The invention relates to the technical field of preparation of perfluoroether rubber, in particular to a preparation method of perfluoroether rubber, which is characterized in that through a coherent'polymerization-internal mixing-open mixing-vulcanization 'process, the Mooney viscosity is obviously reduced to be less than or equal to 20 ML, the fluidity is improved by 2.5 times, weld marks are thoroughly eliminated, and the molding yield is more than or equal to 99.5%; low-temperature rapid vulcanization saves energy by 20%, the heat resistance grade is improved to 300 DEG C * 168 h compression set less than or equal to 10%, meanwhile, the service life of the mold is prolonged, waste products are reduced, the comprehensive cost is reduced by 15%, and the advantages of high flowability, high heat resistance, high yield and low cost are achieved. Therefore, the problems of high Mooney viscosity, poor flowability, obvious weld marks and insufficient heat resistance in the prior art are solved.

The application provides a preparation method of hydrophobic modified perfluoro ether elastomer, and applies to the technical field of perfluoro ether elastomer, and comprises the following steps: S1, mixing fluorine-containing vinyl cross-linkable fluorocarbon surfactant and ethylene glycol monomethyl ether, and stirring to obtain a composite dispersed microemulsion; S2, adding deionized water and vulcanization point monomer to the composite dispersed microemulsion, and stirring to form an emulsion; S3, adding perfluoromethyl vinyl ether and an initiator, and introducing tetrafluoroethylene gas to perform polymerization reaction, so as to obtain a perfluoro ether elastomer emulsion; S4, performing demulsification treatment, washing after acidification by concentrated sulfuric acid, and performing hydrophobic modification, so as to obtain hydrophobic modified perfluoro ether elastomer micro powder; and S5, mixing, mold pressing and secondary vulcanization are sequentially performed on the hydrophobic modified perfluoro ether elastomer micro powder, so as to obtain a hydrophobic modified perfluoro ether elastomer sealing product. According to the application, the perfluoro ether elastomer with low viscosity can be prepared, and the pollution of the fluorine-containing surfactant to the environment is reduced.

The invention is suitable for the technical field of vehicles, and provides a corrosion-resistant ammonia gas engine ejector which comprises an electromagnetic driving part and a nozzle assembly, the electromagnetic driving part and the nozzle assembly are isolated through a corrugated pipe, and ammonia gas is prevented from corroding the electromagnetic part. A two-stage sealing structure formed by a polytetrafluoroethylene gasket and a perfluoroether rubber O-shaped ring is arranged in the nozzle assembly, and the valve seat and the lower needle valve adopt conical sealing surfaces. The ammonia fuel injector has excellent corrosion resistance, sealing performance and abrasion resistance, ammonia gas leakage can be effectively prevented, and the reliability and safety of the injector in an ammonia fuel engine are improved.

The utility model is applicable to the technical field of perfluoroether rubber processing, and provides a production cutting machine which comprises a bottom table, a door frame is fixedly connected to the upper end of the bottom table, an electric push rod is fixedly connected to the inner wall of the top end of the door frame, a connecting plate is fixedly connected to the driving end of the electric push rod, and a middle plate is fixedly connected to the lower end of the connecting plate. The lower end of the middle plate is fixedly connected with a cutting knife, the two side walls of the connecting plate are fixedly connected with concentric-square-shaped blocks, the inner walls of the concentric-square-shaped blocks are provided with containing grooves, the containing grooves penetrate through the concentric-square-shaped blocks, the inner walls of the containing grooves are slidably connected with connecting shafts, and the lower ends of the connecting shafts are fixedly connected with abutting pressing plates; an extrusion assembly is arranged on the connecting shaft in a matched manner; the bottom table is further fixedly connected with a conveying device. The material cutting device has the advantages that materials can be effectively prevented from deviating or moving in the cutting process, so that the cutting precision is remarkably improved, and the material cutting device can adapt to materials with different thicknesses.

The invention provides a preparation method of perfluoroether rubber, and relates to the technical field of perfluoroether rubber. The preparation method of the perfluoroether rubber comprises the following steps: carrying out emulsion polymerization on tetrafluoroethylene, perfluoroalkyl vinyl ether and a nitrile group-containing vulcanization point monomer in an aqueous medium containing an emulsifier and a compatibilizer, and carrying out condensation, filtration and drying to obtain the perfluoroether rubber elastomer. The specific non-perfluorooctanoic acid ammonium emulsifier is adopted, perfluoroalkyl tetrahydrofuran is used as a compatibilizer in the polymerization process to obtain the high-performance perfluoroether elastomer, and the excellent high-temperature resistance and mechanical property of the perfluoroether elastomer can replace perfluoroether rubber produced by adopting a PFOA emulsifier.

The invention relates to a strong acid and alkali corrosion resistant metal rubber composite sealing material and a preparation method thereof, and belongs to the technical field of sealing materials, the strong acid and alkali corrosion resistant metal rubber composite sealing material comprises a metal framework layer, a high-performance corrosion resistant bonding layer coated on the metal framework layer, and a corrosion resistant rubber sealing layer firmly combined with the bonding layer through chemical bonding, the corrosion-resistant rubber sealing layer is prepared from a composite elastomer of fluororubber and perfluoroether rubber, and is compounded with a nanoscale corrosion-resistant filler, and the preparation method mainly comprises the steps of cleaning and microporous treatment of a metal framework, preparation and coating of a corrosion-resistant adhesive, mixing and forming of a corrosion-resistant rubber composite, and preparation of the corrosion-resistant rubber sealing layer. And performing final hot-pressing vulcanization and secondary curing. In the invention, through optimization of a material system and collaborative design of a multi-layer composite structure and an interface strengthening process, the tolerance, permeability resistance and structural integrity of the material to media such as concentrated acid, concentrated alkali and the like under wide temperature range and high pressure difference are remarkably improved, and the material has excellent long-term sealing reliability and long service life.

The invention discloses a perfluoroether rubber material with high temperature resistance and low compression set. The perfluoroether rubber material comprises the following components in parts by mass: 100 parts of perfluoroether rubber; 10-30 parts of a carbon black reinforcing agent; 2.5 to 5 parts of nano zinc oxide; 2.5 to 5 parts of superfine barium sulfate; 1-3 parts of a vulcanizing agent; and 0.2 to 0.5 part of an auxiliary vulcanizing agent. The invention also discloses a preparation method of the perfluoroether rubber material. The preparation method comprises preparation of a perfluoroether rubber compound and hot-pressing vulcanization of perfluoroether rubber. The obtained perfluoroether rubber material is excellent in high-temperature resistance and low in compression set, and has important guiding significance on development of high-temperature-resistant sealing materials.

The invention discloses a gel electrolyte precursor, a gel electrolyte, a preparation method of the gel electrolyte and a battery, and relates to the technical field of secondary batteries. The gel electrolyte precursor disclosed by the invention comprises dithio dimethyl diacrylate, polyperfluoroether dimethyl diacrylate, a cross-linking agent, an electrolyte and an initiator, wherein the structural formula of the dithio dimethyl diacrylate is shown as a formula I in the specification; the structural formula of the polyperfluoroether dimethyl diacrylate is as shown in a formula II; in the formula I, R1 is any one of an oxy group and an imino group, and R2 is any one of a substituted or unsubstituted C1-C4 alkylene group and a substituted or unsubstituted C6-C14 arylene group; in the formula II, n is an integer from 1 to 20. The gel electrolyte prepared from the gel electrolyte precursor has good ionic conductivity and mechanical stability.

Disclosed are a perfluoropolyether functionalized in a fluorinated chain, a preparation method therefor and a use thereof, and a modified perfluoroelastomer. The perfluoropolyether has a structure as shown in formula (I): formula (I); in formula (I), A and B are each independently selected from a substituted or unsubstituted ester group; Rf is a perfluoropolyether segment; X1 and X2 are each independently hydroxyl, a fluorine element, or fluorinated alkyl; Y is a halogen or a hydrogen atom; and C is a carbon atom. The perfluoropolyether functionalized in the fluorinated chain has excellent thermal stability, and the functionalized perfluoropolyether can be self-crosslinked, or compounded and crosslinked with a fluoroelastomer, a perfluoroelastomer, a fluorosilicone rubber, or a non-fluoroelastomer to finally obtain a product having low-temperature performance and thermal stability.

Provided in the present application are a true triaxial acid fracturing physical simulation and conductivity integrated synchronous test device and a method. The device comprises: a clamping module, comprising a clamping holder, an X-axis assembly, a Y-axis assembly, a Z-axis assembly and a perfluoroelastomer sleeve; a seepage module, comprising a simulated wellbore; and a monitoring module, used for monitoring the flow rate of an acid fracturing fluid, the fluid distribution in a core, and the morphology and conductivity of acid-etched fractures or hydraulic fractures. At least one surface of the X-axis assembly, the Y-axis assembly and the Z-axis assembly is in close contact with the inner side of the perfluoroelastomer sleeve, and the clamping module is configured to, under the drive of a servo module, change liquid chambers of the X-axis assembly, the Y-axis assembly and the Z-axis assembly, so as to squeeze a core wrapped in the perfluoroelastomer sleeve. The described configuration can achieve integrated monitoring of the fluid distribution in a core and the morphology and conductivity of acid-etched fractures or hydraulic fractures, and also reduce adverse effects caused by stress concentration, so as to improve the accuracy of tests.