876 results about "Poly ether ether ketone" patented technology

The invention belongs to the technical field of solid floating body material preparation, and particularly relates to a method for preparing a high-performance hollow glass bead / epoxy resin floating body material. Uniformly mixing the hollow glass beads subjected to surface treatment with polyether-ether-ketone, vibrating and compacting in a mold, heating to 370-380 DEG C, preserving heat for 15-20 minutes, and cooling to room temperature, so as to obtain a porous preform; and pouring mixed liquid of liquid epoxy resin and a curing agent into the porous prefabricated body, and curing to obtain the high-performance hollow glass bead / epoxy resin floating body material. The hollow glass beads in the prepared floating body material are complete in structure, high in filling rate and uniform in distribution, the floating body material is free of bubble phases, and the strength is remarkably improved.

The invention relates to the technical field of heavy anti-corrosion coatings, in particular to a graphene enhanced epoxy modified organic silicon resin heavy anti-corrosion powder coating. The coating is prepared from the following components in parts by weight: 42 to 58 parts of epoxidized epoxy modified organic silicon resin, 0.8 to 2.5 parts of hydroxylated graphene, 6 to 11 parts of nano zirconium dioxide coated boron nitride, 2.5 to 5.5 parts of lanthanum iso-octoate-titanate composite coupling agent, 1.5 to 3.5 parts of bis (3-triethoxysilylpropyl) disulfide, 4 to 7 parts of polyhedral oligomeric silsesquioxane, 5 to 8 parts of curing agent, 0.8 to 1.8 parts of flatting agent and 0.4 to 0.9 part of defoaming agent. 2.5 to 4.5 parts of polyether-ether-ketone micro powder and 1.2 to 2.8 parts of fluorine-containing phosphate ester. According to the invention, the resin is modified through chemical bridging, the modified graphene and the nano-coated powder are matched to construct a synergistic enhancement system, and the interface bonding is optimized by the composite coupling agent. The coating is excellent in adhesive force, corrosion resistance and mechanical property, good in processing fluidity and high in aging resistance and thermal stability, solves the problem that a traditional product is short in performance, and meets the industrial requirement.

The invention discloses polyether-ether-ketone resin with adjustable molecular weight distribution as well as a synthesis method and application of the polyether-ether-ketone resin. The synthesis method comprises the following steps: preparing polyether-ether-ketone resin in the presence of carbonate and / or bicarbonate of alkali metal; wherein the carbonate and / or bicarbonate of the alkali metal comprises sodium carbonate and potassium carbonate, and the sodium carbonate has gradient particle size distribution. According to the invention, sodium carbonate with specific particle size distribution is used to regulate and control the reaction rate to be stable and continuous, so that the molecular weight distribution of the polymer presents a narrower distribution form. Therefore, the molecular structure is uniform, the molecular form is uniform, the physical and chemical properties, including mechanical strength, thermal stability and chemical stability, of the material can be improved, and particularly, the thermal stability of the material is improved most remarkably.

The invention discloses a high-strength nano composite stiffening filling master batch and a preparation method thereof, and relates to the technical field of high polymer materials, the raw materials comprise a nano filler, a matrix material and a functional additive; the nano filler comprises nano diamond, nano silicon carbide and bio-based nano cellulose, the base material comprises polyimide, polyether-ether-ketone and bio-based polylactic acid, and the functional additive comprises a hindered phenol antioxidant, a nano aluminum hydroxide flame retardant, a nano silicon dioxide reinforcing agent, an ultraviolet light absorber, a carbon nano tube and nano silver particles. Nano-diamond, nano-silicon carbide and bio-based nano-cellulose are adopted as nano-fillers, polyimide, polyether-ether-ketone and bio-based polylactic acid are combined as base materials, and a plurality of functional additives are added, so that the preparation of the high-strength nano-composite stiffening filling master batch is realized; and the problems of poor dispersibility, mechanical property damage, insufficient hardness and poor interface bonding of the traditional filler master batch can be solved.

The invention relates to multi-scale modeling and mechanical and thermodynamic property simulation of a particle reinforced biological composite material, and belongs to the crossing field of biology, material science and computer simulation. The method specifically comprises the following steps: constructing a polyether-ether-ketone (PEEK) high-molecular polymer and a graphene reinforced composite material model thereof through a cross-linking algorithm under a microscopic scale, and simulating and calculating the mechanical and thermodynamic properties of the model by adopting molecular dynamics; in the microscopic scale, constructing a representative volume element model of the microstructure artificial skeleton, inputting property parameters calculated by molecular dynamics into a microscopic model, and calculating microscopic mechanical and thermodynamic properties of the model by adopting a substance point method; and inputting the property parameters obtained under the microscale into the macroscopic model, and calculating the overall macromechanical and thermodynamic behavior response of the material by adopting a finite element method. According to the method, mechanical and thermodynamic responses of the biological composite material are finally simulated through transmission of property parameters of different scales, and theoretical support is provided for research and formula design of the particle reinforced biological composite material.

The invention belongs to the technical field of 3D printing materials, and particularly relates to an interlayer reinforced composite material, a preparation method thereof and application of the interlayer reinforced composite material as a 3D printing material. A copolymerization group is introduced into polyaryletherketone, so that polyaryletherketone has a unique molecular structure and can compete with folding of an ether ketone chain segment in the crystallization process, in this way, in-situ copolymerization polyaryletherketone has a lower crystallization rate compared with polyether-ether-ketone or a polyether ketone system, the healing time of adjacent fused filaments of a 3D printing product is prolonged, and the 3D printing quality is improved. Compared with a conventional 3D printing material, the 3D printing material has the advantages that the interlayer strength is effectively improved and the interlayer reinforcing effect is achieved due to the long healing time, the interlayer performance of a 3D printing product obtained by using the 3D printing material is good, the tensile strength is 120-130 MPa, the interlayer tensile strength is 20-30 MPa, and the application range is wider. The interlayer reinforced composite material provided by the invention has the advantages of lower melting point, favorable processability, favorable mechanical properties, favorable high-temperature resistance and excellent comprehensive properties.

The invention relates to an electromagnetic shielding resistant PPS alloy material containing modified carbon nanotubes, and belongs to the technical field of polymer composite materials. The PPS alloy material comprises 70-85 parts of polyphenylene sulfide, 5-15 parts of polyether-ether-ketone or a liquid crystal polymer, 3-8 parts of carbon nanotubes subjected to acyl chloride-amido double-step modification and 5-12 parts of carbon fibers subjected to oxidation treatment, and the carbon fibers subjected to oxidation treatment are covalently connected with the carbon nanotubes subjected to double-step modification. 0.5 to 1.5 parts of a coupling agent, 0.3 to 0.8 part of an antioxidant and 0.2 to 0.6 part of a lubricant. According to the invention, the carbon nanotubes are subjected to surface grafting group modification, and the carbon fibers are subjected to surface oxidation treatment, so that the technical problems that the carbon nanotubes are easy to agglomerate, the interface between the carbon fibers and the matrix is weak, and the shielding efficiency and the mechanical property are difficult to consider are solved, and the carbon nanotubes and the PPS matrix form a composite reinforced structure; the comprehensive improvement of the material in the aspects of electromagnetic shielding, mechanical property, thermal stability and the like is realized.

An article, a method of making the same, and a method of using the same are provided. Such an article includes at least one coated layer, which includes a substrate and a coating disposed on the substrate. The coating includes a layered nanomaterial and a solute embedded and distributed in the layered nanomaterial. The solute comprises at least one salt soluble in a solvent. The substrate comprises a polymer, for example, a high-performance polymer such as polyether ether ketone and poly(para-phenylene terephthalamide). The article is used for thermal management applications, for example, as protective garment.

The invention relates to the technical field of polyether-ether-ketone composite materials, in particular to a conjugated polythiophene-polyether-ether-ketone-based high-antibacterial coating and a preparation method thereof.The preparation method comprises the steps that hydroxyl modified boron nitride with photocatalytic capacity and aminated PEEK are subjected to melt blending to generate chemical bonding, and a BN-OH / PEEK-NH2 composite fine powder material is formed; then carrying out oxidative polymerization on the BN-OH / PEEK-NH2 composite fine powder and a thiophene monomer under the action of an oxidizing agent, carrying out in-situ synthesis to obtain a polythiophene / BN-OH / PEEK-NH2 conjugated composite material, and subsequently spraying the polythiophene / BN-OH / PEEK-NH2 conjugated composite material to the surface of a base material to prepare a composite coating with excellent antibacterial property, high thermal stability and low friction coefficient; the antibacterial rate of the coating on escherichia coli and staphylococcus aureus under illumination reaches 90% or above, and the coating is suitable for the medical antibacterial field.

The invention discloses a surface coating modified calcium phosphate microsphere and a preparation method thereof, and belongs to the technical field of calcium phosphate microsphere preparation. The surface coating modified calcium phosphate microspheres are prepared from the following components in parts by weight: 60 to 68 parts of calcium phosphate ceramic powder, 20 to 32 parts of modified bioactive bodies, 8 to 12 parts of composite pore forming agents and 2 to 5 parts of binding agents, the modified bioactive body is prepared from vinyltriethoxysilane, butyl dibutyl phosphate, citric acid, calcium acetate, magnesium sulfate and polyether-ether-ketone fibers, and the composite pore-forming agent is prepared from octyl dimethyl tertiary amine, epoxy chloropropane, hydrolyzed soybean protein and starch. The calcium phosphate microspheres prepared by the method have excellent porosity and biological activity.

The invention relates to the technical field of biomedical materials, in particular to an artificial bone composite material and a preparation method thereof. The preparation method of the artificial bone composite material comprises the following steps: sequentially adding a CaCl2 solution and a NaH2PO4 solution into a collagen solution in proportion. And adjusting the pH value to 7.4, and collecting white jelly. Dispersing the white jelly in distilled water to obtain a colloid I; respectively adding the colloid I and the modified polyether-ether-ketone powder into a dichloromethane solution containing poly-L-lactic acid in proportion to obtain a mixed solution II, and then adding an ethanol solution for precipitation; and removing the precipitate in the mixed solution II to obtain the slurry. Injecting the slurry into a mold to obtain an intermediate I, and soaking the intermediate I in an EDC / NHS ethanol solution for crosslinking; according to the preparation method, the artificial bone composite material with high mechanical strength and good biocompatibility can be prepared, the defect that the biocompatibility and mechanical strength resistance of the artificial bone composite material cannot be obtained at the same time in the prior art can be overcome, and the practicability of the artificial bone composite material is improved.

The invention relates to the technical field of scale inhibition materials, in particular to a slowly-dissolved micro-nano dispersion scale inhibition material and a preparation method thereof. The composite material comprises a four-layer structure, wherein a porous hydroxyapatite core anchors DTPMP through phosphate radical vacancy to inhibit burst release; sulfonated polyetheretherketone and a cross-linking agent are compounded to form an ion selective controlled release layer, and the diffusion rate of the scale inhibitor is regulated and controlled; photo-thermal conversion graphene quantum dots are embedded in a temperature-sensitive hydrogel shell, and dynamic release is triggered through temperature or Ca < 2 + > concentration; and the corrosion resistance and the mechanical stability are enhanced by the atomic layer deposited ceramic layer and the epoxy resin packaging layer. By constructing a four-layer composite slow-release system, long-acting scale inhibition, extreme tolerance and dynamic response are achieved, the technical problems that a traditional scale inhibition material is high in burst release rate, poor in weather resistance and delayed in release are solved, the water treatment cost per ton is low, the RO membrane service life is long, and a full-period efficient scale inhibition solution is provided for a complex industrial water system.

The invention belongs to the technical field of all-vanadium redox flow battery diaphragms, and particularly discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyetheretherketone and concentrated sulfuric acid, and carrying out water bath heating reaction to prepare a sulfonated polyetheretherketone solid; molybdenum disulfide and methylbenzene are mixed and subjected to ultrasonic treatment, 1, 3-propane sultone is added, oil bath heating is conducted, and sulfonated molybdenum disulfide powder is prepared; the preparation method comprises the following steps: mixing and stirring sulfonated molybdenum disulfide powder, polyaniline and a DMF (Dimethyl Formamide) solution, performing ultrasonic treatment, adding a sulfonated polyether-ether-ketone solid, stirring to obtain membrane casting slurry, coating a glass plate with the membrane casting slurry, drying to form a membrane, and soaking the membrane in a sulfuric acid solution and deionized water in sequence to obtain the sulfonated polyether-ether-ketone / polyaniline composite membrane. The invention discloses a sulfonated polyetheretherketone / polyaniline composite membrane as well as a preparation method and application thereof. The sulfonated polyetheretherketone / polyaniline composite membrane has high proton conductivity, can maintain relatively low vanadium ion permeability and can improve the electrochemical performance of an all-vanadium redox flow battery.

The invention discloses a PC-based building template material with a wide use temperature range and a production method of the PC-based building template material, and belongs to the technical field of building template materials. The PC-based building template material with the wide use temperature range is characterized by being prepared from the following components in parts by weight: 60 to 80 parts of polycarbonate, 10 to 15 parts of modified polyether-ether-ketone, 10 to 20 parts of organic silicon rubber, 3 to 5 parts of a compatible aid, 0.3 to 0.5 part of an antioxidant and 0.2 to 0.5 part of a light stabilizer, the modified polyether-ether-ketone is prepared from maleic anhydride modified polyether-ether-ketone. According to the PC-based building template material, modified polyether-ether-ketone, organic silicon rubber and polycarbonate in a specific proportion are matched to act, so that the compatibility of a matrix is ensured, the high-temperature resistance and low-temperature resistance of the building template material are improved, and the use temperature range of the PC-based building template material is widened; and by adding the compatible auxiliary agent, the overall compatibility is further improved, the phase separation phenomenon is avoided, and the overall consistency and stability of the material are improved.

The invention provides an acidic redox flow battery diaphragm and a preparation method thereof, belongs to the technical field of flow batteries, and aims to solve the technical problems of low energy efficiency and poor cycling stability of flow batteries. The preparation method comprises the following steps: preparing a sulfonated polyetheretherketone solution, and coating one surface of a diaphragm substrate with the sulfonated polyetheretherketone solution; and dispersing and dissolving nano aluminum oxide and an adhesive into a solvent to prepare slurry, and coating the slurry on the other surface of the diaphragm substrate. The positive electrode side is coated with a layer of sulfonated polyetheretherketone, the hydrophilicity and ion exchange rate of the modified membrane are improved by regulating and controlling the sulfonation degree and the thickness of a modified layer, the negative electrode side is coated with Nano-Al2O3, and the purposes of improving the mechanical strength of the positive electrode side of the diaphragm and inhibiting zinc dendrite generation are achieved by regulating and controlling the content of Nano-Al2O3 and the coating thickness.

The invention relates to a filter screen and a preparation method and application thereof, and belongs to the technical field of filtering equipment, the filter screen comprises a hydrophobic enhancement layer, a pre-filtering layer and a core filtering layer which are stacked in sequence; the hydrophobic reinforcing layer comprises the following components: metal fibers; the pre-filtering layer is prepared from the following components: basalt fibers; and the core filter layer comprises the following components: polytetrafluoroethylene fibers and polyether-ether-ketone fibers. By designing the structure of the filter screen, the filter screen which can stably work in a high-temperature environment, has excellent hydrophobic performance and filtering efficiency and is controllable in manufacturing cost is obtained.

The invention provides a triazinyl imidazole porous covalent organic polymer material, preparation thereof and application of the triazinyl imidazole porous covalent organic polymer material in an all-vanadium redox flow battery proton exchange membrane. The triazinyl imidazole covalent organic polymer with high specific surface area, porosity and high structural stability is synthesized, sulfonation modification is performed on the triazinyl imidazole covalent organic polymer, a proton carrier is loaded after sulfonation modification, and the triazinyl imidazole porous covalent organic polymer material with high proton conductivity is obtained. According to the invention, the triazinyl imidazole porous covalent organic polymer material and sulfonated polyetheretherketone are jointly used for preparing the composite membrane, so that the composite membrane shows excellent vanadium resistance and relatively high ion selectivity, and can stably operate in the all-vanadium redox flow battery, so that the comprehensive performance of the all-vanadium redox flow battery is remarkably improved.

The invention provides a sulfonated polyetheretherketone-based diaphragm as well as a preparation method and application thereof, and belongs to the technical field of flow battery diaphragms. The preparation method comprises the following steps: firstly, sulfonating polyether-ether-ketone to obtain sulfonated polyether-ether-ketone; and then preparing an electrostatic spinning solution from sulfonated polyether-ether-ketone and MXene powder, and carrying out electrostatic spinning on the electrostatic spinning solution to obtain the sulfonated polyether-ether-ketone-based diaphragm. Sulfonated polyether-ether-ketone and MXene materials are used as raw materials to prepare the nanofiber diaphragm through electrostatic spinning, on one hand, a hydrogen bond formed between MXene and sulfonated polyether-ether-ketone can increase the mechanical stability of the nanofiber diaphragm, and on the other hand, the water absorption rate, the swelling degree and the pore distribution of the nanofiber diaphragm are improved by adding MXene; and the practical performance of the diaphragm is improved.

The invention discloses a modified polyether-ether-ketone composite material and a preparation method thereof, and belongs to the technical field of high polymer materials. The modified polyether-ether-ketone composite material comprises the following raw materials in parts by weight: 60-85 parts of a polyether-ether-ketone resin matrix; 5 to 15 parts of carbon fiber; 5 to 20 parts of modified nano silicon dioxide; 5 to 10 parts of hydroxyapatite; 0.5 to 2 parts of a coupling agent; 2 to 4 parts of compatilizer; the preparation method comprises the following steps: carrying out nucleophilic substitution reaction on p-hydroxyacetophenone and 2-chloro-5-nitro-trifluoromethyl benzene to obtain an intermediate 1; carrying out a benzene cyclization reaction on the intermediate 1 to obtain a trinitro compound; then under the action of hydrazine hydrate, reducing the fluorine-containing triamine monomer into a fluorine-containing triamine monomer; then, the fluorine-containing triamine monomer reacts with 4, 4 '-(hexafluoroisopropenyl) diphthalic anhydride to prepare a modified compatilizer; the modified polyether-ether-ketone composite material prepared by the invention has excellent tensile strength, corrosion resistance and wear resistance.

The invention discloses a preparation method of a tinned copper core fluorinated ethylene propylene insulated cable for aerospace, and relates to the technical field of aerospace cable preparation methods. The preparation method comprises the following steps: S1, preparing a nickel-plated copper core; s2, preparing a heat insulation layer; s3, a composite insulating layer is prepared, the composite insulating layer is composed of a first insulating layer, a second insulating layer and a third insulating layer from inside to outside, the first insulating layer is a fluorinated ethylene propylene layer, the second insulating layer is a polyimide / fluorinated ethylene propylene composite layer, and the third insulating layer is a polyether-ether-ketone layer; s4, preparing a shielding layer; and S5, preparing a protective layer. The invention provides the preparation method of the tinned copper core fluorinated ethylene propylene insulated cable for aerospace, the insulated cable prepared by the preparation method has high performance and high reliability in an extreme aerospace environment, and all key requirements of electrical performance, radiation resistance, mechanical strength and wear resistance are comprehensively met.

The invention discloses a digital stable jaw pad designing and manufacturing method, and relates to the technical field of oral rehabilitation and digital medical technology.The digital stable jaw pad manufacturing method comprises the following steps that a, three-dimensional point cloud data of oral dentition and mucosa of a patient is obtained through a three-dimensional scanner; b) determining a stable jaw position coordinate model by using an optical motion capture system; c) designing a jaw pad three-dimensional entity model with an anterior tooth area, a posterior tooth area and an edge structure based on the three-dimensional point cloud data and the stable jaw coordinate model; and d) manufacturing the jaw pad through 3D printing equipment, wherein the 3D printing equipment is formed by adopting a polyether-ether-ketone material. By integrating digital acquisition, design and manufacturing technologies, the pain point of a traditional method is solved, and personalized, high-precision and rapid manufacturing of the stable jaw pad is realized.

The invention relates to the technical field of biological materials for 3D printing, in particular to a polyether-ether-ketone composite material with an enhanced 3D printing function and a preparation method of the polyether-ether-ketone composite material. The invention discloses a polyether-ether-ketone composite material with an enhanced 3D printing function. The material is prepared from the following raw materials in parts by mass: 75-85 parts of polyether-ether-ketone, 5-10 parts of a modified bioactive material, 1-3 parts of carbon nanotubes, 0.5-2 parts of an organic nucleating agent, 0.1-1 part of a biological regulator and 0.1-1 part of an antibacterial agent, the modified bioactive material is modified hydroxyapatite and / or modified tricalcium phosphate. According to the basic formula, the synergistic effect of multifunctional components is achieved, the defects of an existing PEEK material in the aspects of biological activity and crystallization performance are overcome through the components such as polyether-ether-ketone, the modified bioactive material and the carbon nanotubes which are meticulously proportioned, and excellent mechanical performance and biocompatibility are provided.

The invention relates to the technical field of anion exchange membranes, in particular to a dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production and a preparation method of the dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production, and the dual-ion-channel synergistic enhanced conduction anion exchange membrane for alkaline water electrolysis hydrogen production is prepared by blending and crosslinking quaternized polyether-ether-ketone and carboxylated polyether sulfone, the carboxylated polyethersulfone provides a cation channel to form a double-ion synergistic conduction structure; the preparation process of the anion exchange membrane comprises the steps of quaternized polyether-ether-ketone synthesis, carboxylated polyether sulfone synthesis, membrane casting solution preparation, tape casting drying, crosslinking treatment and alkali liquor ion exchange. By constructing a double-ion channel structure, the synergistic conduction of anions and cations is realized, and the total ion conduction efficiency of the membrane is remarkably improved. The two polymer components form a continuously interlaced channel network, so that the defect that the conduction path of the traditional single ion channel membrane is isolated is avoided.

The invention discloses a high-conductivity porous polymer composite material and a preparation method thereof, and relates to the technical field of conductive composite materials. The high-conductivity porous polymer composite material is prepared by mixing polyether-ether-ketone, amino-functionalized graphene, a silver nanowire / carbon nanotube hybrid filler, a porous polyimide microsphere carrier, an ionic liquid and an antioxidant. The preparation method comprises the following steps: preparing amino-functionalized graphene; preparing a hybrid filler microsphere complex; performing mixing; preparing a porous prefabricated body; and carrying out mould pressing and shaping. According to the composite material disclosed by the invention, through multi-scale structural design and environment-friendly process innovation, high conductivity, high-strength mechanical properties and light weight are realized under the condition of low filler addition amount.

The invention belongs to the technical field of polymer chemical production, and discloses a method for continuously and efficiently preparing polyether-ether-ketone. The method comprises the following steps: dissolving 4, 4 '-difluorobenzophenone and diphenyl sulfone in a first dissolving tank to obtain a 4, 4'-difluorobenzophenone solution; hydroquinone, a catalyst and diphenyl sulfone are placed in a second dissolving tank to be dissolved, and a hydroquinone solution is obtained; the preparation method comprises the following steps: injecting a 4, 4 '-difluorobenzophenone solution and a hydroquinone solution into a reactor for polymerization reaction to obtain a mixed solution; injecting the mixed solution into a separator through a heat exchanger for separation to obtain polyether-ether-ketone and liquid; distilling the liquid to obtain diphenyl sulfone and sodium fluoride, and returning the obtained diphenyl sulfone to participate in dissolution; all the steps are carried out in a protective atmosphere. The preparation process provided by the invention is a brand new PEEK production process flow, and realizes continuous PEEK production and efficient energy recycling.

The invention discloses a high-strength wear-resistant protective material for a power cable and a preparation method of the high-strength wear-resistant protective material, and relates to the technical field of preparation of wear-resistant materials. The composite material is prepared from 40-60 parts of polyether-ether-ketone resin, 15-25 parts of silicon carbide whiskers, 10-20 parts of basalt fibers, 5-10 parts of a silane coupling agent, 3-8 parts of a lubricant, 2-6 parts of an antioxidant, 1-3 parts of nano titanium dioxide, 0.5-2 parts of a rare earth compound, 1-3 parts of boron nitride nanotubes, 0.5-2 parts of graphene nanoplatelets and 1-2 parts of fluororubber micro powder. The length-diameter ratio of the silicon carbide whiskers is 50-100, the diameter of the basalt fibers is 5-15 microns, the pipe diameter of the boron nitride nanotubes is 5-20 nm, the length of the boron nitride nanotubes is 100-500 nm, the thickness of the graphene microchips is 1-5 nm, and the sheet diameter of the graphene microchips is 1-10 microns. The tensile strength of the material is not lower than 150 MPa, the shore hardness is not lower than D85, the abrasion loss is low, the insulativity is good, the weather resistance and the chemical corrosion resistance are good, a special preparation process is adopted, and the performance is optimized; the cable sheath can be used for protecting various power cables and prolonging the service life of the cables.

The invention relates to polyether-ether-ketone resin with extremely narrow molecular weight distribution as well as a preparation method and application of the polyether-ether-ketone resin. The preparation method of the polyether-ether-ketone resin comprises the following steps: uniformly mixing 4, 4 '-difluorobenzophenone, a phenolic monomer, a salt-forming agent and a solvent in an inert atmosphere, carrying out gradient heating, and then carrying out end capping; the gradient heating comprises the following steps: in the initial stage, the heat preservation temperature is 140-210 DEG C, in the transition stage, the heat preservation temperature is 250-280 DEG C, and in the final stage, the heat preservation temperature is 300-320 DEG C. The prepared PEEK resin has very narrow molecular weight distribution, the chemical, heat-resistant stability, anti-fatigue performance and mechanical performance of the PEEK resin can be remarkably improved, and the high-performance and high-quality requirements of PEEK in the high-end manufacturing field such as aerospace, medical treatment, electronics and semiconductors are met.

The invention discloses a low-dielectric-constant polyamide material, and relates to the technical field of high polymer materials. The invention discloses a low-dielectric-constant polyamide material. The composite material is prepared from the following raw materials in parts by weight: 35 to 45 parts of polyamide 66, 5 to 10 parts of polytetrafluoroethylene micro powder, 8 to 12 parts of modified porous siloxane microspheres, 3 to 7 parts of modified nano zinc oxide, 10 to 15 parts of glass fibers, 4 to 8 parts of polyether-ether-ketone, 1 to 3 parts of graphene nanosheets, 3 to 5 parts of fluororubber, 1 to 2 parts of a titanate coupling agent, 0.3 to 0.7 part of an antioxidant 1010, 0.5 to 1.0 part of ethylene bis stearamide and 0.1 to 0.3 part of an ultraviolet absorbent UV-531. The low-dielectric-constant polyamide material has the remarkable advantages that the raw materials are scientifically proportioned, and various modified components are contained to enhance the performance; all the components are subjected to special treatment, so that the compatibility is good; the preparation process is rigorous, and the material has excellent dielectric properties; and the material also has good heat resistance and weather resistance and strong mechanical properties, and is suitable for various scenes with high dielectric constant requirements.

The invention discloses a polyphenol modified carbon fiber reinforced sulfonated polyetheretherketone composite material and a preparation method thereof, and belongs to the field of polymer composites.The preparation method comprises the steps that a resin matrix and filler are filled into a mold to be sintered, the resin matrix is sulfonated polyetheretherketone, the filler comprises modified carbon fibers and nano-silicon dioxide, and the modified carbon fibers and the nano-silicon dioxide are sintered to obtain the polyphenol modified carbon fiber reinforced sulfonated polyetheretherketone composite material; the modified carbon fiber is prepared by taking carbon fiber, catechol and polyethyleneimine as raw materials in a Tris buffer solution. The hydration lubrication performance of a resin matrix is improved through sulfonated polyetheretherketone, the hydrophilic property is enhanced, a polyphenol coating is formed through self-polymerization reaction on the surfaces of the carbon fibers, the adhesion performance of the surfaces of the fibers is improved through the pi-pi stacking effect, and the interface bonding force between the carbon fibers and the modified resin matrix is enhanced; the nano silicon dioxide is introduced to modify the matrix of the composite material, so that not only is the overall wettability of the material optimized, but also the mechanical property and the wear resistance are effectively improved, and the final composite material has the characteristics of high strength and low friction.

The invention discloses a preparation method of a vanadium battery electrolyte oxidation corrosion resistant composite membrane, which comprises the following steps: S1, uniformly dispersing graphene oxide nanosheets on the surface of an SPEEK (sulfonated polyether ether ketone) matrix by using sulfonated polyether ether ketone as a substrate to obtain an SPEEK / GO (graphene oxide) substrate; s2, treating the SPEEK / GO substrate in oxygen plasma treatment equipment, and ultrasonically cleaning the SPEEK / GO substrate with isopropanol for 10-20 minutes; s3, dissolving polybenzimidazole in N, N-dimethylacetamide (the concentration is 3-5wt%), and magnetically stirring until the polybenzimidazole is completely dissolved; the preparation method comprises the following steps: adding TiO2 nanoparticles (the particle size is 20-25nm, and the TiO2 nanoparticles are pretreated by a silane coupling agent KH-570) according to the mass ratio of 15-20%, ultrasonically dispersing and carrying out ice bath to obtain PBI-TiO2 dispersion liquid; s4, the SPEEK / GO substrate treated in the step S1 is vertically immersed in PBI-TiO2 dispersion liquid, the final coating thickness is 1.5 + / -0.2 [mu] m, and a pretreated film is obtained; and S5, carrying out hot pressing on the pretreated membrane by using a hot press, and then carrying out gradient cooling to room temperature to obtain the final composite membrane. The vanadium battery is better in vanadium resistance and corrosion resistance and suitable for high-power-density vanadium batteries.