94 results about "Poly ether ether ketone" patented technology

The application discloses a method and system for preparing polyether ether ketone (PEEK) resin by a step-by-step method. The method comprises negative pressure salt dehydration, positive pressure monomer addition and polymerization. In the negative pressure stage (‑0.06~‑0.09 MPa, 120~160℃), water is removed efficiently; in the positive pressure stage (0.05~0.14 MPa), 4,4'-difluorobenzophenone is added and polymerized at 280~320℃. The system is equipped with double condensation reaction towers and an intelligent control system, realizing alternating dehydration and continuous production. The method does not need to add water-carrying agents, effectively inhibits monomer volatilization and hydrolysis, and can stably prepare high-performance PEEK resin with high molecular weight (30,000~50,000 g / mol) and narrow distribution (PDI≤2.0).

The present application relates to a kind of diaphragm and its preparation method and electric device.The diaphragm includes base film, and the base film includes opposite first surface and second surface along the thickness direction;The first surface is provided with first coating, and the first coating includes polycaprolactone, metal oxide catalyst and bismuth-tin eutectic alloy;The second surface is provided with second coating, and the second coating includes core-shell material, and the core-shell material includes inner core and polymer shell, and the inner core includes perfluoropolyether and azobisisobutyronitrile;The base film includes polyether ether ketone and polyphenylene sulfide.The diaphragm provided by the present application uses polyether ether ketone and polyphenylene sulfide as mixed base film, and the first coating and the second coating are differentially set, the diaphragm heat response is sensitive, effectively prevent the occurrence of thermal runaway, the safety performance of lithium ion battery is significantly improved, meanwhile, the energy density of battery has also been greatly improved, and the cycle performance of battery is good.

This invention discloses a polyetheretherketone (PEEK) / aramid fiber composite microporous material and its molding method, belonging to the field of engineering plastics processing. The invention first modifies aramid fibers by amylation and prepares carboxylated PEEK. Covalent bonding between the amino and carboxyl groups is achieved through a chemical reaction, resulting in aramid fibers coated with PEEK. These fibers are then mixed with PEEK resin, a melt flow modifier, and additives to obtain a composite material. The composite material is then subjected to biaxial thermo-stretching orientation to improve its transverse / longitudinal orientation and crystallinity. Finally, the composite microporous material is obtained through supercritical CO2 microporous foaming. Because the foaming temperature is lower than the thermo-stretching orientation temperature, the biaxial orientation structure of the composite material is well preserved, and the well-dispersed aramid fibers effectively improve the cell wall strength, inhibit cell growth and merging, significantly increase cell density, and drastically reduce cell size, thereby constructing a high-strength, heat-insulating PEEK composite microporous material.

The application relates to the technical field of medical suture materials, and particularly discloses a non-absorbable suture with tissue self-adaptive performance, which comprises a core layer, a transition layer and an outer layer; the core layer and the transition layer are fixed through hot melt adhesion, and the outer layer is coated on the surface of the transition layer through electrostatic spinning; the core layer is a polyether ether ketone fiber with a diameter of 50-100 mu m and a tensile modulus of greater than or equal to 3 Gpa; the transition layer is a nickel-titanium alloy wire braided net with a thickness of 40-60 mu m, and the wire diameter of the nickel-titanium alloy wire is 20-30 mu m; and the outer layer is a poly-lactic acid-glycolic acid copolymer coating layer containing nano-hydroxyapatite with a thickness of 30-50 mu m; and the application further provides a preparation method of the non-absorbable suture. The non-absorbable suture has the advantages of tissue self-adaptive performance, persistent mechanical support and bioactivity, can effectively avoid tissue cutting, abrasion and suture loosening, and can reduce the incidence of postoperative complications such as inflammation and pain.

The application discloses a PSPEEK / COF composite membrane for reverse electrodialysis technology and a preparation method thereof, and belongs to the technical field of renewable energy extraction. First, sulfonated polyether ether ketone material is synthesized by using ether ether ketone and concentrated sulfuric acid, then a porous sulfonated polyether ether ketone casting solution is prepared by adding a solvent and polyethylene glycol 400, then a COF membrane is formed above the PSPEEK casting solution by using an interfacial polymerization method, finally, the PSPEEK / COF composite membrane is obtained by removing the solvent and polyethylene glycol 400. The COF membrane with inherent pore transmission channels is prepared first, and the COF membrane is used for selectively conducting cations. The mechanical stability of the COF membrane is improved by combining the COF membrane with the PSPEEK substrate. The prepared membrane has high salt difference power generation performance and long service life.

The application relates to the technical field of composite materials, and discloses a mixed-fiber fabric reinforced thermoplastic composite material laminated plate and a preparation method and application thereof. The laminated plate is obtained by die molding a preformed body, wherein the preformed body comprises a plurality of mixed-fiber fabrics and thermoplastic resin films which are sequentially stacked in layers, and the thermoplastic resin film is selected from one or more of a polyamide film, a polyphenylene sulfide film, a polyether ether ketone film, a poly (aryl ether ketone) film, a polycarbonate film and a polysulfone film. The prepared thermoplastic laminated plate is uniform in resin distribution and excellent in comprehensive mechanical properties.

This invention relates to the field of composite materials, specifically to a high-strength, high-temperature resistant composite material for parts and its preparation method. It addresses the problems of poor high-temperature resistance and insufficient mechanical properties in existing composite materials. This composite material incorporates fluorobiphenyl-naphthylfuranyl polyaryletherketone, multi-walled carbon nanotubes, and polyetheretherketone. The preparation of fluorobiphenyl-naphthylfuranyl polyaryletherketone involves first synthesizing bis(trifluoromethyl)-biphenyl-dibromonaphthalene and reacting it with 5-formaldehyde-furan-2-boric acid to obtain dialdehyde-furanylnaphthalene-bis(trifluoromethyl)biphenyl. The aldehyde group then reacts with 4-aminophenol to obtain dihydroxyfuranylnaphthalene-bis(trifluoromethyl)biphenyl, which is then polymerized with 4,4'-difluorobenzophenone to obtain fluorobiphenyl-naphthylfuranyl polyaryletherketone. The rigid structure reduces chain segment movement, improves tensile strength and modulus, and enhances the polymer's high-temperature resistance, thereby improving the overall durability and reliability of the material.

The application discloses a kind of PEI or PEEK-based 3D printing wave-absorbing materials and preparation method thereof.The 3D printing wave-absorbing material includes the following components by mass fraction: polyetherimide resin or polyether ether ketone resin: 45~65 parts;Electromagnetic wave absorber: 10~50 parts;Impact modifier: 4~12 parts;Flow aid: 2~8 parts;Antioxidant: 0.5~3 parts;Wherein, the electromagnetic wave absorber includes magnetic absorber and carbon-based absorber, the impact modifier and the carbon-based absorber are pre-coated to form the carbon-based absorber coated with the impact modifier on the surface, and the magnetic absorber is surface modified by silane coupling agent.The application significantly improves the mechanical properties and thermal stability of the material by using specific raw material composition and combining specific multi-layer co-extrusion and online heat treatment process.The preparation process is simple and easy to operate, and is suitable for industrial continuous production.

The present application belongs to the technical field of emergency oil wick, and provides a synthetic fiber felt-polymer aerogel composite material and its preparation and application, a high-temperature-resistant emergency oil wick and its preparation and application. The present application combines synthetic fiber felt and polymer aerogel (polyimide aerogel, polyether ether ketone aerogel or polyphenylene sulfide aerogel), and improves the high-temperature resistance of the synthetic fiber felt-polymer aerogel composite material. The synthetic fiber felt has high-temperature resistance, and the polyimide aerogel, polyether ether ketone aerogel or polyphenylene sulfide aerogel not only has good temperature resistance, but also provides abundant pore structure to provide space for the storage of lubricating oil. The emergency oil wick prepared by taking the synthetic fiber felt-polymer aerogel composite material provided by the present application as the core part not only can withstand the problem of temperature rise caused by continuous poor lubrication, but also can continuously and stably supply lubricating oil, thereby avoiding the rapid failure of the moving parts in a short period of time and ensuring stable operation within a certain period of time.

This invention relates to the field of new energy materials and fuel cell technology, specifically to a method for preparing a SPEEK / COF-PE composite proton exchange membrane material and its application. By combining sulfonated polyether ether ketone (PE) with a covalent organic framework material (COF-PE), a multi-level proton conduction channel and hydrogen bond network are constructed. This approach combines the film-forming properties of SPEEK with the pore structure characteristics of COF-PE, resulting in a significant simultaneous improvement in the material's proton conductivity, mechanical strength, and chemical stability. When applied to fuel cell proton conduction, this material exhibits high proton conductivity, high tensile strength, and strong chemical stability. This invention addresses the performance shortcomings of traditional non-fluorinated proton exchange membranes, overcomes the environmental and cost limitations of fluorinated proton exchange membranes, and achieves a balance between proton conduction performance and overall stability. It has practical significance in promoting the industrialization of non-fluorinated proton exchange membranes and adapting them for hydrogen fuel cell applications in new energy vehicles, portable power supplies, and other scenarios.

This utility model discloses an automatic raw material dispensing mechanism, belonging to the technical field of electrode paste production equipment. It includes a frame, a spiral conveying component, a drive motor, and an operation controller. The inner wall of the spiral conveying component is provided with a gradient hydrophobic composite material layer, which is composed of 3-5 alternating layers of nano-silica hydrophobic coating and polyether ether ketone wear-resistant layer. The outer wall of the spiral conveying component is evenly distributed with dynamic airflow regulating components in a ring. A multimodal vibrator is also integrated on the outer wall of the spiral conveying component. The multimodal vibrator includes a piezoelectric ceramic high-frequency vibrator and an electromagnetic low-frequency vibrator. The piezoelectric ceramic high-frequency vibrator and the electromagnetic low-frequency vibrator are staggered along the axial direction of the spiral conveying component, and the vibration direction is set at a 30-60° angle to the axis of the spiral conveying component. This effectively solves the problem of severe material adhesion and reduced mixing quality after long-term operation of existing automatic dispensing mechanisms.

This application discloses a method for preparing electronic-grade sodium fluoride from polyetheretherketone (PEEK) cleaning water, belonging to the field of chemical synthesis technology. The method uses cleaning water generated during PEEK production as raw material. After distillation to remove organic solvents, the water is neutralized with hydrogen fluoride, purified by adsorption with activated carbon and chelating resin, and concentrated and crystallized to obtain crude sodium fluoride. This crude sodium fluoride is then pulped with solvent and dried to obtain the finished electronic-grade sodium fluoride. This application effectively solves the problem of resource utilization of fluoride-containing wastewater in the PEEK manufacturing industry, realizing "turning waste into treasure," promoting the development of a green circular economy in the PEEK industry, and providing high-quality and inexpensive electronic-grade sodium fluoride raw material for the sodium-ion battery industry.

This invention discloses a method for crushing and purifying polyetheretherketone (PEEK), PEEK materials, and their applications. Belonging to the field of polymer composite materials technology, the method employs a process control approach using the polymerization mother liquor to regulate the polymer morphology in the polymerization solution, causing PEEK to precipitate in the form of spherical particles with a microspherical structure. Simple crushing yields low-particle-size ultrafine PEEK powder, with a particle size adjustable within the range of 8-100 micrometers and a high spheroidization rate. Simultaneously, the crushed low-particle-size ultrafine PEEK powder facilitates the purification of PEEK. Washing with organic solvents such as ethanol and acetone, and distilled water, PEEK powder can be obtained with high efficiency and cost-effectiveness. Due to the small particle size of PEEK, it is easy to purify. After simple purification, the cytotoxicity and hemolysis rate meet the standards for implantable medical-grade PEEK materials for human implantation, reducing the raw material costs of medical product manufacturing and enabling the general public to use more affordable and high-quality medical products.

The application discloses a kind of lithiated polyether ether ketone-based composite solid electrolyte and preparation method thereof.The preparation method comprises the following steps: polyether ether ketone polymer is sulfonated in concentrated sulfuric acid, then ion exchange is carried out in lithium hydroxide aqueous solution, to obtain lithiated polyether ether ketone;Lithiated polyether ether ketone, lithium bis-trifluoromethylsulfonimide is dissolved in organic solvent to prepare polymer / lithium salt solution, and butanedinitrile, fluoroethylene carbonate is added, to obtain lithiated polyether ether ketone / butanedinitrile composite electrolyte solution;Lithiated polyether ether ketone / butanedinitrile composite electrolyte solution is prepared into film, and after drying, lithiated polyether ether ketone-based composite solid electrolyte is obtained.The composite solid electrolyte film of the application has mechanical flexibility and thermal dimensional stability, not only optimizes the interface stability of electrolyte and electrode, but also significantly improves the ionic conductivity and charge-discharge cycle stability of lithium metal battery, fundamentally improves the thermal safety and capacity decay problem of lithium metal battery.

The utility model relates to the technical field of conveying belt, especially adjustable angle of inclination conveying belt of polyether ether ketone extrusion strip, including conveying belt subassembly and polyether ether ketone strip, conveying belt subassembly lower end rotatory connection has first support, the position of conveying belt subassembly close right -hand member rotatory connection has the inclination adjustment subassembly, the inclination adjustment subassembly lower end is installed with second support, the inside rotatory connection of inclination adjustment subassembly has the fender subassembly, the inclination adjustment subassembly includes servo motor, servo motor main shaft terminal fixedly connected with worm, the outside of worm is engaged with the outside of turbine, turbine inside fixedly connected with axle rod, axle rod one side fixedly connected with triangle frame, triangle frame left end is seted up with assembly hole, triangle frame upper end and lower end all are fixedly connected with reinforcing arm, in the utility model, the device effectively solves the problem of pulling caused by the conveying speed not keeping up with the inclination speed, reduces the deformation probability, ensures the dimensional accuracy and appearance quality, improves the production efficiency and product quality.

The present application relates to the technical field of chemical synthesis, and particularly relates to a preparation method of 4,4'-difluorobenzophenone and a method for synthesizing polyether ether ketone by two steps of carbon tetrachloride. The preparation method of 4,4'-difluorobenzophenone comprises the following steps: under the condition that trifluoromethanesulfonic acid and N-methyl pyrrolidone exist, CCl4 and fluorobenzene are reacted, and the product is hydrolyzed to obtain 4,4'-difluorobenzophenone. The present application solves the problems of high cost, poor environmental protection and performance that cannot meet market requirements of PEEK by innovating raw material route, catalytic system and process parameters, realizes low-cost, green and high-performance synthesis of PEEK, the purity of the prepared DFBP monomer can reach >=99.99%, and the PEEK molecular weight distribution (PDI<=1.9) can be narrowed, and the method is suitable for industrialized production of PEEK materials used in high-end fields such as aerospace, medical devices and electronic and electrical appliances.

This invention relates to the field of flow battery technology and discloses a method for suppressing water migration in zinc-iron flow batteries by modifying the separator using an electric field. The technical solution includes the following steps: S1, preparing a sulfonated polyether ether ketone (SPEEK) membrane of a certain area; S2, sandwiching the SPEEK membrane between two insulating rubber sheets to prevent damage to the metal electrodes, placing the two metal electrodes on the outside of the two insulating rubber sheets respectively; S3, applying voltage to the electrodes on both sides of the separator using a capacitor, so that the SPEEK membrane wrapped in the insulating rubber sheets is in an electric field space. In this invention, the SPEEK membrane can achieve orientation control of its ordered phase morphology under the action of an electric field. The main chain skeleton of SPEEK is arranged in a regular and orderly manner. A high-intensity electric field is more conducive to achieving the orientation of hydrophobic channels in the SPEEK membrane, which can effectively alleviate water migration. SPEEK membranes with oriented structures were prepared by applying electric fields of different intensities perpendicular to the membrane surface. This invention can effectively improve the water migration problem in alkaline zinc-iron flow batteries. Furthermore, the preparation process of this invention is simple to operate and has significant effects.

This invention relates to a low-cost method and system for preparing PEEK materials, belonging to the field of plastics production technology. The method includes: collecting the required quantity and types of raw materials; determining the required quantity of raw materials based on the type of raw material and the required quantity; determining the required quantity of end-capping agent based on the required quantity of raw materials; selecting a type of detergent based on the type of raw materials and the required quantity; adding difluoromonomers and bisphenol monomers to an organic solvent based on the required quantity of raw materials, and adding a salt-forming agent for polymerization; adding a phenylacetylene end-capping agent based on the required quantity of end-capping agent to obtain an initial oligomer; and washing and drying the initial oligomer based on the type of detergent to obtain a self-heating crosslinkable PEEK oligomer. This invention effectively reduces the preparation cost of polyether ether ketone (PEEK).

A kind of microporous sulfonated poly (ether ether ketone) membrane for reverse electrodialysis energy conversion, preparation method and application thereof belong to ion exchange membrane technical field. First, bisphenol fluorene, 4,4'-difluorobenzophenone, alkaline catalyst and water-removing agent are added into solvent to carry out nucleophilic polycondensation reaction to obtain poly (ether ether ketone) ;Second, it is dissolved in anhydrous dichloromethane, and chlorosulfonic acid / dichloromethane solution is added to carry out sulfonation reaction to obtain sulfonated poly (ether ether ketone) with different sulfonation degrees;Finally, it is dissolved and formed into film by solution casting method, the main chain is the copolymer of bisphenol fluorene and 4,4'-difluorobenzophenone, and the main chain contains rigid fluorenyl structural unit.The rigid fluorenyl structural unit of the application limits the conformational rotation of the main chain by steric hindrance, forms size-stable intrinsic microporous ion channel, realizes the rigidification of ion channel and the intrinsic microporous structure while maintaining the excellent film-forming property of SPEEK;Long-term operation stability is excellent, preparation process is simple, raw material cost is controllable, and it is suitable for reverse electrodialysis energy conversion field.

The application relates to a kind of polyether ether ketone hollow fiber loose nanofiltration membrane and its preparation method and application, belong to nanofiltration membrane technical field.Solve the problem that the mechanical strength and flux of existing polyether ether ketone hollow fiber nanofiltration membrane cannot be considered.The method of the present application, first dry polyether ether ketone powder and polyetherimide powder are blended, then melt granulation, then the obtained blended resin particles are extruded, then the obtained blended precursor hollow fiber is heat treated, extracted into selective extractant to extract pore, finally the obtained nascent polyether ether ketone hollow fiber is first cold stretched, then heat stretched, to obtain nanofiltration membrane.The nanofiltration membrane has high strength, high flux and excellent acid, alkali and organic solvent corrosion resistance, the rejection rate of macromolecular weight (>=600Da) dye molecules is more than 95%, and the rejection rate of monovalent salt such as sodium chloride is less than 10%.It is suitable for dye desalination, printing and dyeing wastewater treatment and high value-added dye recovery and other separation processes in harsh environment.

The application belongs to the technical field of electric wire and cable, and discloses an insulating electric wire and a preparation method thereof, a coil and an electronic / electrical device, wherein the insulating electric wire comprises a conductor and an adhesive layer and an insulating layer arranged outside the conductor in sequence, the insulating layer comprises polyether ether ketone resin and a corona-resistant filler, and the corona-resistant filler is composed of corona-resistant inorganic particles and a compatible resin wrapped on part or all of the outer surface of the corona-resistant inorganic particles. In the insulating layer of PEEK, the corona-resistant inorganic particles with the compatible resin grafted on the surface are introduced, the dispersion of the corona-resistant inorganic particles and the interfacial bonding force between the corona-resistant inorganic particles and the matrix are improved by using the good compatibility of the compatible resin with the PEEK matrix. The compatible resin enables the PEEK and the corona-resistant inorganic particles to be uniformly mixed, thereby ensuring the adhesion between each other, which helps to reduce the partial discharge phenomenon caused by the interface defects and enhances the resistance of the corona-resistant filler to the corona erosion.

The present application relates to the technical field of polyimide, in particular to a modified polyimide resin for carbon fiber composite material, and a preparation method and application thereof.Preparation raw materials include bisether anhydride type polyamide acid solution, ketone anhydride type polyamide acid solution and thermoplastic polymer solution, and the polymer in the thermoplastic polymer solution includes at least one of polyether ether ketone, polyether sulfone, polysulfone and polyphenyl sulfone.The present application can effectively reduce the viscosity while keeping the mechanical properties by modifying the polyimide resin with specific thermoplastic polymer, and the viscosity of the modified polyimide resin at 25 DEG C can be reduced to 5000 cp by selecting polyether sulfone; and the mechanical properties of the modified polyimide resin based composite material can be improved by limiting the weight ratio of the bisether anhydride type polyamide acid solution, the ketone anhydride type polyamide acid solution and the thermoplastic polymer solution to 1:(0.9-1.1):(0.3-0.8).

This invention relates to a method for preparing a wide-temperature-range nylon composite material resistant to ethylene glycol corrosion, comprising the following steps: S1, pre-structuring treatment of functional additives: S11, pre-reacting sulfonated polyether ether ketone with a reactive compatibilizer in a twin-screw extruder at a reaction temperature of 220-240℃ to obtain a surface-modified anti-swelling additive A; S12, encapsulating and granulating a carbodiimide hydrolytic stabilizer with a hot-melt coating material in a low-temperature extruder to obtain a microencapsulated hydrolytic stabilizer B; S2, staged sequential blending; S3, gradient structure construction and curing. This invention, through pre-structuring treatment of functional additives, staged sequential blending, and gradient interface construction, prepares a nylon composite material resistant to ethylene glycol corrosion and exhibiting excellent mechanical properties over a wide temperature range.

The application belongs to the technical field of metal plate synthesis, and particularly relates to a preparation method of a continuous carbon fiber reinforced polyether ether ketone matrix fiber metal laminate, and the mass fractions of the raw materials for preparing the continuous carbon fiber reinforced polyether ether ketone matrix fiber metal laminate are as follows: tetrabutyl titanate 3-5 parts, silane coupling agent 10-15 parts, polyether ether ketone 2.5-5 parts, alcoholized CNT 0.4-0.7 parts, Al2O3 0.5 parts, boron nitride 0.3 parts and tetraisopropyl titanate 1-1.5 parts; carbon cloth is used as a substrate, tetrabutyl titanate is impregnated to generate TiC on the surface of the fiber in situ through annealing, PEEK-silane is deposited through electrospinning to construct a triple strong interface, and the carbon fiber reinforcing effect is exerted; a composite transition layer containing Al2O3 / boron nitride is prepared through electrostatic auxiliary deposition of a metal layer, and a double strong interface is constructed through amination, and finally two layers of hydrogen bonds are connected into an integrated structure, so that the mechanical properties and high-temperature stability are synergistically improved.

The application relates to the technical field of fluid machinery and equipment, in particular to a wear-resistant and corrosion-resistant water pump which comprises a fixing structure for being capable of being connected with different pipes, a supporting structure for reducing external impact, and a protection structure for improving wear resistance and corrosion resistance, wherein the protection structure is internally provided with the supporting structure, and the bottom is fixedly connected with a round shaft. The water pump can be protected by the protection layer, the connecting layer, the corrosion-resistant layer and the fixing layer, the protection structure can perform multi-level protection on the pump body through the material layers with different properties, the niobium alloy and the tantalum alloy have high strength and good wear resistance, the polyether ether ketone material has excellent corrosion resistance, the aramid composite material can provide good structural strength and stability, the technical problem that the water pump is prone to wear and corrosion in a harsh environment can be solved through the multi-layer protection structure, the service life of the water pump can be prolonged, and the reliability of the water pump can be improved.

The application discloses a variable-temperature curing low-dielectric cyanate ester resin composition, a prepreg and a preparation method thereof. The variable-temperature curing low-dielectric cyanate ester resin composition comprises the following components in parts by weight: 50-100 parts of cyanate ester resin; 15-30 parts of a multifunctional epoxy resin, wherein the multifunctional epoxy resin is a multifunctional glycidyl amine type epoxy resin, and the molecular structure comprises more than three epoxy groups and an aromatic amine skeleton, and the epoxy equivalent is 95-110 g / Eq; 10-20 parts of a toughening agent comprising one or more of polyphenylene ether, polyether ketone, polyether ether ketone, polyarylether ketone and polyether ether ketone containing terminal hydroxyl groups or terminal amino groups; and 0.05-0.1 parts of an accelerator. In-situ grafting reaction of the terminal hydroxyl groups or the terminal amino groups with the cyanate ester system is utilized, macroscopic phase separation of the thermoplastic resin in the curing process is avoided, excellent film-forming property and excellent dielectric property are ensured.