145 results about "Polyether ether ketone" patented technology

The invention discloses a multi-layer protection cable resistant to an extreme environment, and belongs to the technical field of cables. The cable is of a seven-layer composite structure design and sequentially comprises a conductor, an insulating layer, a shielding layer, a buffer layer, a waterproof layer, a heat insulation layer and a protective outer layer from inside to outside, and the conductor is made of high-purity oxygen-free copper; the insulating layer is made of a polyimide material and has high temperature resistance, low temperature resistance and excellent insulating property; the shielding layer is composed of a tinned copper wire woven mesh and a high-permeability permalloy foil, and electromagnetic interference is effectively shielded; the buffer layer is made of an elastic rubber material to relieve mechanical stress; the waterproof layer adopts a nanoscale fluorosilicone resin coating and has excellent waterproof performance; the heat insulation layer is made of ceramic fibers and aerogel, and efficient heat insulation is provided; and the protective outer layer is made of a high-strength and corrosion-resistant polyether-ether-ketone (PEEK) material. The cable has excellent high temperature resistance, low temperature resistance, corrosion resistance and electromagnetic interference resistance, is suitable for extreme environments, and ensures stable transmission of electric power and signals under extreme conditions.

The invention discloses a high-performance polyether-ether-ketone modified sealing material and a preparation method thereof, and relates to the technical field of sealing materials. The high-performance polyether-ether-ketone modified sealing material is prepared from the following raw materials in percentage by mass: 5 to 10 percent of polytetrafluoroethylene micro powder, 5 to 10 percent of graphene nanosheets, 10 to 15 percent of silicon carbide whiskers, 0.5 to 2 percent of silane coupling agent and the balance of polyether-ether-ketone, the preparation method of the high-performance polyether-ether-ketone modified sealing material comprises the following steps: mixing graphene nanosheets with a silane coupling agent, deionized water and absolute ethyl alcohol, carrying out ultrasonic dispersion for 2 hours, carrying out pretreatment to obtain a graphene nanosheet suspension, mixing the graphene nanosheet suspension with silicon carbide whiskers, polytetrafluoroethylene micro powder and polyether-ether-ketone, carrying out melt blending, and carrying out compression molding to obtain the high-performance polyether-ether-ketone modified sealing material. And cooling to obtain the high-performance polyether-ether-ketone modified sealing material.

The invention discloses a graphene-based high-strength heat-conducting film and a preparation method thereof, belongs to the technical field of heat-conducting film preparation, and aims to solve the technical problem that the strength and corrosion resistance of a heat-conducting film in the prior art need to be further improved. Graphene-aromatic phosphonate heat-conducting resin, maleic anhydride grafted fluorinated polyether-ether-ketone and fluorinated siloxane elastomer are jointly applied to membrane material preparation, so that the material forms a system with a continuous structure in the aspects of heat-conducting framework construction, interface connection and deformation slow release, the graphene-aromatic phosphonate heat-conducting resin provides a high-efficiency heat-conducting path, the maleic anhydride grafted fluorinated polyether-ether-ketone realizes stable interface bonding, and the fluorinated siloxane elastomer endows the membrane material with a structure retention capability under an external force and a medium environment. The obtained high-strength heat-conducting film has relatively high heat conductivity coefficient, strength and quality stability in an acid-base environment, and shows excellent comprehensive performance.

The invention relates to the technical field of commercial spaceflight, in particular to a self-repairing liquid metal heat pipe for commercial spaceflight, which comprises a polyether-ether-ketone composite pipe, gallium bismuth zinc liquid gold, a micro-nano repairing film, a main hot runner, a pressure detector, a standby hot runner and an emergency plugging valve, and the main hot runner is an axial through channel in the polyether-ether-ketone composite pipe, and the standby hot runners are annularly and circumferentially arrayed along the inner wall of the main hot runner. Compared with heat conduction in the prior art, medium leakage is stopped through cooperative plugging in a damaged scene, so that the heat conduction efficiency is improved, and the service life of the heat exchanger is prolonged. And meanwhile, the detector is in signal linkage with the plugging valve, a heat transfer loop is rapidly switched in the case of serious damage, the continuous and stable thermal control function is achieved, and therefore the on-orbit operation life of a spacecraft is further prolonged.

An extrusion product, such as a film, pipe, or cable / wire sheath, includes a first layer and a second layer. The first layer includes a polymeric material (A) having repeating units of the formula: -0-Ph-0-Ph-CO-Ph I and repeating units of the formula: -0-Ph-Ph-0-Ph-CO-Ph II, where Ph represents a phenylene moiety. The second layer may be a polyaryletherketone (PAEK), such as polyetheretherketone (PEEK). The first layer is intended to reduce the formation of deposits on the die of an extrusion device during extrusion of the product. A method for producing a product including the first layer and the second layer, as well as the use of the polymeric material (A) to reduce the formation of deposits on the die of an extrusion device during extrusion of a second polymeric material, are also described.

The invention relates to a rudder controller-based embracing arm type anti-loosening device which comprises a shell, a cover plate is arranged at the top of the shell, a connector is arranged at the top of the cover plate, a PCB is fixedly connected to the interior of the shell, first mounting columns are fixedly connected to the left side and the right side of the top of the cover plate, and second mounting columns are arranged at the bottoms of the first mounting columns; a cushion block is arranged outside the first mounting column, a clamping hole is formed in the outer portion of the cushion block, a mounting assembly used for conveniently assembling the second mounting column into the first mounting column is arranged at the top of the second mounting column, and two clamping blocks are fixedly connected to the outer portion of the mounting assembly. Through cooperation of the cushion blocks made of insulation polyether-ether-ketone resin, the precisely fixed PCB, the cover plate, the connector and other structures, the effects of precise electrical connection and stable overall structure are achieved, the cushion blocks and the first mounting columns form holding arm type clamping connection through the clamping holes, the bottoms of the cushion blocks make contact with the PCB, electrical interference is isolated through the insulation performance, and the service life of the PCB is prolonged. And meanwhile, high-strength stable support is provided.

This invention belongs to the field of cable technology, specifically a thin-walled oxygen-barrier high-temperature resistant cable, comprising a conductor core and a thin-walled outer sheath. The conductor core has a high-temperature resistant insulation layer made of polyetheretherketone (PEEK) composite material on its outer side. Between the high-temperature resistant insulation layer and the thin-walled outer sheath, from the inside out, are sequentially arranged a ceramicized oxygen barrier layer and a flame-retardant reinforcement layer. The ceramicized oxygen barrier layer is a nano-modified ceramicized silicone rubber layer with a thickness of 0.05–0.15 mm, including an outer layer doped with silicon carbide whiskers and an inner layer doped with zinc borate. This invention prepares an ultra-thin ceramicized layer through gradient doping, resolving the contradiction between thin-walled design and oxygen barrier properties, and effectively improving the interfacial peel strength. This reduces the cable's outer diameter and bending radius, making the cable lightweight and suitable for high-dynamic applications.

The invention discloses a high-wear-resistance polytetrafluoroethylene sealing ring and a preparation method thereof, and belongs to the technical field of sealing rings. The invention relates to a high-wear-resistance polytetrafluoroethylene sealing ring, which is prepared from the following components in parts by mass: 100 parts of polytetrafluoroethylene resin (PTFE); 3 parts of nano silicon dioxide (SiO2); 5 parts of graphite powder; 10 parts of chopped carbon fiber; 1 part of a molybdenum disulfide (MoS2) solid lubricant; and 2 parts of polyether-ether-ketone (PEEK) micro powder. The nano silicon dioxide is subjected to surface hydroxylation treatment and then is grafted with the coupling agent, so that the affinity and dispersity of the nano silicon dioxide in a PTFE matrix are improved, the agglomeration phenomenon is avoided, and uniform reinforced phase distribution is formed, thereby ensuring the consistency of the performance of the material.

This invention belongs to the field of high-performance thermoplastic composite granule preparation and process optimization technology. Specifically, it relates to a method and system for determining the optimal process for twin-screw extrusion preparation of carbon fiber / polyetheretherketone (PEEK) granules based on numerical simulation and multi-objective optimization. A three-dimensional model of the internal flow channel of the twin-screw extruder is established, and discretization is performed using a mesh stacking method. Multiple simulation conditions are constructed within a preset temperature and extrusion speed range, and process safety constraints are established. The analytic hierarchy process (AHP) – approximation of ideal solution ranking method is used for index standardization, weight allocation, and comprehensive scoring. With process temperature and extrusion speed as decision variables, a non-dominated sorting genetic algorithm is used for multi-objective global search to obtain the Pareto optimal solution set, which is then ranked and optimized to output recommended process parameter combinations. This invention's method can reduce the risk of thermal degradation and fiber damage while considering the mixing effect, and reduces the cost and cycle time of trial and error.

A medical implant (10) includes: a non-metallic core (26) comprising polyetheretherketone (PEEK); and a non-metallic reinforcing layer (34) coupled to the core. The core is at least partially encapsulated by the reinforcing layer, and the reinforcing layer comprises carbon fiber strands.

The invention discloses a medical-grade PEEK composite material for 3D printing and a preparation method of the medical-grade PEEK composite material, relates to the technical field of 3D printing, and solves the problem of low biological activity of an existing PEEK material. The medical-grade PEEK composite material is prepared from the following raw materials in parts by weight: 80-95 parts of a polyether-ether-ketone matrix, 5-15 parts of a bioactive filler, 0.5-5 parts of an interface modifier and 0.1-3 parts of a heat conduction and nucleation enhancer, the bioactive filler comprises nano-hydroxyapatite and bioactive glass in a weight ratio of (1-5): (5-1). The natural bone environment can be effectively simulated, the biological activity of the composite material is improved, and cell adhesion and proliferation are promoted, so that the cell proliferation rate is increased, and the antibacterial effect and the mechanical property of the composite material can be effectively improved.

This invention discloses a bandgap-tunable vibration-damping metamaterial containing resonant units, belonging to the field of vibration control technology. The invention consists of an array of cells with localized resonant characteristics arranged in a specific direction. Each cell is a negative Poisson's ratio combined with a spring oscillator structure, mainly composed of an outer negative Poisson's ratio structure frame, an S-shaped spring structure at the connection point, a cylindrical oscillator, and a ring. The cylindrical oscillator is embedded within the ring at the center of the negative Poisson's ratio combined with the spring oscillator structure and connected to the symmetrical centerline of the outer negative Poisson's ratio structure frame via the S-shaped spring. The internal S-shaped spring structure and the ring structure are rigidly connected. The ring structure and the cylindrical oscillator are fitted with an interference fit. The outer negative Poisson's ratio structure frame is made of low-density materials such as polyetheretherketone, polylactic acid, and aluminum alloy, while the cylindrical oscillator is made of high-density pure tungsten. This invention inhibits wave propagation along a predetermined direction within the bandgap range, achieving vibration reduction.

This invention discloses a method for preparing a reinforced polyetheretherketone (PEEK) porous self-lubricating material. The main steps are as follows: Step 1: Grind the dried composite powder and mix it with additive powder, ball mill to homogenize, and then dry the homogenized composite powder. The composite powder includes carbon fiber or carbon nanotubes, PEEK powder, and NaCl powder. Step 2: Prepare PEEK / CF / NaCl or PEEK / CNTS / NaCl composite filaments using a twin-screw extruder. Step 3: Prepare samples using FDM printing with the composite filaments. Step 4: Clean the samples obtained in Step 3 using a water washing method. Step 5: Heat-treat the samples to obtain heat-treated composite material samples. Step 6: Immerse the treated composite material samples in lubricating oil and place them in a vacuum chamber to obtain porous self-lubricating samples. This invention provides a controllable and efficient preparation of self-lubricating composite materials. The introduction of carbon fiber or carbon nanotube reinforcing phases and the implementation of the heat treatment process effectively improve the lubrication environment of the friction pair and enhance the self-lubricating performance of the material.

The utility model relates to the technical field of polyether-ether-ketone filaments, in particular to a drying device for polyether-ether-ketone filament production, which comprises a drying box, a dryer arranged on the inner side of the drying box, a mounting component, an extrusion component, a winding component and a beating mechanism, the extrusion assembly is arranged at the end of the drying box. The winding assembly is arranged at the end, away from the wire pulling assembly, of the drying box, a mounting block is clamped to the end of the vibrating piece, and the end, away from the vibrating piece, of the mounting block is connected with the inner side of the drying box. The beating mechanism is arranged on the side face of the winding assembly. Through the arrangement of the beating mechanism and the extrusion assembly, water on the surfaces of the PEEK wires is absorbed before the PEEK wires enter the drying box, and the PEEK wires are driven to shake to shake off the water on the PEEK wires when the PEEK wires move in the drying box, so that the time and energy required in the drying process can be reduced, and the drying efficiency is improved; and the drying process is more uniform.

This invention belongs to the field of polymer composite materials technology, and relates to a lightweight PEEK wear-resistant material and its preparation method. The lightweight PEEK wear-resistant material of this invention is composed of the following components by mass percentage: 65%~75% PEEK plastic, 8%~15% lightweight modifier, 14%~17% wear-resistant reinforcing agent, and 3%~5% auxiliary additives; wherein, the lightweight modifier is composed of modified hollow glass microspheres and modified carbon fibers in a mass ratio of 1~3:1; the wear-resistant reinforcing agent is composed of modified titanium dioxide and zinc sulfide in a mass ratio of 2~4:1; and the auxiliary additives are composed of antioxidant 1010, antioxidant 168, polytetrafluoroethylene micropowder, and polyetheretherketone.

The invention relates to the technical field of grinding and polishing, in particular to a corrosion-resistant and wear-resistant liquid slip ring for precise grinding and polishing. The slip ring comprises a static part and a rotating part which are made of polyether-ether-ketone, and a wear-resistant sealing assembly comprising a zirconia ceramic wear-resistant spacer bush and a fluororubber sealing piece. All flow passage components are made of PEEK materials, so that pollution of metal ions to grinding fluid is completely eradicated; the high-hardness and high-smoothness ceramic wear-resistant spacer bush is used as a core rotating pair, so that the abrasive wear resistance is greatly improved; a multi-layer sealing protection system composed of a static seal, a fluororubber framework oil seal dynamic seal and an auxiliary isolation structure composed of small gaps is constructed, particles can be effectively retarded, impact can be effectively buffered, and it is ensured that long-term, stable and clean grinding fluid transmission is achieved under the working conditions of strong corrosion and high abrasion.

This application relates to the field of silicon nitride ceramic substrates, specifically disclosing a particle-dispersion toughened silicon nitride ceramic substrate and its preparation method. The particle-dispersion toughened silicon nitride ceramic substrate comprises the following raw materials in parts by weight: 80-120 parts silicon nitride, 60-110 parts alcohol solvent, 5-10 parts binder, 5-12 parts toughening particles, 1-5 parts dispersant, 0.5-1 part defoamer, and 2-5 parts sintering aid. The toughening particles are composed of molybdenum silicide, polyetheretherketone, and aerogel in a mass ratio of 1:0.1-0.5:0.05-0.1. The preparation method is as follows: silicon nitride, alcohol solvent, and toughening particles are ball-milled and mixed evenly; binder, dispersant, defoamer, and sintering aid are added, and ball milling continues until evenly mixed and defoamed to obtain a mixture; the mixture is then cast, dried, isostatically pressed, cut, debinded, sintered at high temperature, and cooled to obtain the finished product; it has the advantages of high strength and good toughness.

The invention discloses a large-size multi-axial wear-resistant fiber fabric and a preparation method thereof, belongs to the technical field of fiber fabric preparation, and aims to solve the technical problem that the wear resistance and the antistatic property of a fiber fabric in the prior art need to be further improved. The preparation method specifically comprises the following steps: adding polyether-ether-ketone and an auxiliary additive into a double-screw extruder, and carrying out melt spinning to obtain the polyether-ether-ketone filament. Carbon fibers are subjected to mixed acid oxidation and amination modification, high-polarity cyanobenzoyl groups are introduced to improve the surface activity of the carbon fibers, a modified sizing agent with amino terminated and cyano side chains is synthesized for dipping treatment to obtain modified carbon fiber filaments, the modified carbon fiber filaments and polyether-ether-ketone filaments are subjected to multi-axial weaving and hot-pressing shaping, and the fiber fabric is prepared. The wear resistance and antistatic property of the fiber fabric are improved, and the mechanical strength of the fiber fabric is also improved.

This invention discloses a liquid crystal polymer copper-clad laminate and its preparation method, relating to the field of liquid crystal polymer technology. The invention involves melt-blending and granulating a liquid crystal polymer, modified polyetheretherketone (PEEK), nanofillers, and a lubricant via twin-screw extrusion, followed by single-screw extrusion casting or blown film production to obtain a thin film, which is then hot-pressed with copper foil to produce the copper-clad laminate. This invention uses fluorinated benzylamine-modified PEEK, utilizing the π-π stacking and van der Waals forces between the fluorinated benzene rings and the liquid crystal polymer to enhance interfacial compatibility, improve melt strength and processing stability, and significantly enhance peel strength. Simultaneously, boron nitride hollow microspheres and diamond powder, after acid treatment, synergistically construct a thermally conductive pathway. The hollow microspheres introduce a trace amount of air to reduce dielectric loss, resulting in a copper-clad laminate that combines high peel strength, excellent thermal conductivity, and low dielectric properties.

This invention discloses a high-strength composite insulation material for cabinet-type instrument transformers, comprising: CuAlZr deposited on an epoxy resin layer. a Gd b Layers, where a = 0.05–0.1, b = 0.03–0.06; in CuAlZr a Gd b CuAlFe deposited on the layer c La d Layers, where c = 0.1–0.15, d = 0.02–0.04; in CuAlFe c La d CuAlNi deposited on the layer e Ce f Layers, where e = 0.05–0.1, f = 0.04–0.08; in CuAlNi e La f CuAlCo ​​deposited on the layer g La h Layers, where g = 0.1–0.15, h = 0.02–0.04; and in CuAlCo g La h A polyetheretherketone (PEEK) layer is coated on top of the epoxy resin. This invention improves the bonding strength between the epoxy resin and PEEK, thereby increasing the strength of the epoxy resin.

This invention discloses a non-metallic shell flexible DC capacitor for power grids, relating to the field of capacitor technology. It includes a shell and a core assembly installed within the shell. The shell includes a top plate, a bottom plate, and several vertically arranged side plates. Adjacent side plates are vertically connected, and horizontal reinforcing ribs are provided between adjacent side plates. The shell is made of polyetheretherketone carbon fiber composite material. This invention addresses the problem of metal flexible DC capacitors, which suffer from heavy metal shells, making transportation and installation difficult, especially at heights where the supporting components bear significant weight, leading to a short installation lifespan.

This invention belongs to the technical field of polyetheretherketone (PEEK) composite materials, and relates to a high thermal conductivity PEEK composite material, its preparation method, and its applications. The high thermal conductivity PEEK composite material disclosed in this invention, by weight, comprises: 50-85 parts PEEK, 10-30 parts one-dimensional fiber material, 1-15 parts boron nitride, and 0.1-20 parts electromagnetically irradiated silicon carbide; the one-dimensional fiber material is short-cut fiber with a length of 1-15 mm; the electromagnetically irradiated silicon carbide is obtained by irradiating silicon carbide with an average particle size of 10-80 µm in a 2-6 GHz electromagnetic wave for 5-20 minutes. The PEEK composite material obtained by this invention possesses high strength, high hardness, high wear resistance, and high thermal conductivity, simultaneously meeting the application requirements of high-end technical fields such as aerospace, automotive industry, electronic semiconductors, and medical devices.

The invention relates to a low-melting-point polyaryletherketone-based composite material as well as a preparation method and application thereof. The polyaryletherketone-based composite material comprises polyether-ether-ketone serving as a matrix and polyaryletherketone which serves as a filling component and contains a rigid ring structure, wherein the polyether-ether-ketone as the matrix comprises a repeating unit of formula I: OPhOPhCOPh (I), and the polyaryletherketone containing the rigid ring structure as the filling component comprises a repeating unit of formula II: OPhPhOPhCOPh (II); the molar ratio of the repeating units of formula I to the repeating units of formula II is in the range of 1: 1 to 9: 1, preferably in the range of 2: 1 to 9: 1, more preferably in the range of 7: 3 to 9: 1; and the melting point of the polyaryletherketone-based composite material is at most 335 DEG C, preferably at most 325 DEG C, and more preferably at most 320 DEG C. The polyaryletherketone-based composite material has an obviously lower melting point, so that the obtained polyaryletherketone-based composite material has improved machinability, is not only suitable for injection molding and mold pressing, but also suitable for 3D printing and laser welding which are usually not applicable to conventional polyaryletherketone with a higher melting point, and can be used for 3D printing and laser welding. The application field of the polyether-ether-ketone is greatly expanded.

The invention discloses a high-impermeability carbon fiber reinforced composite material for a hydrogen storage bottle and a preparation method of the high-impermeability carbon fiber reinforced composite material. The composite material comprises the following components in parts by weight: 50-65 parts of epoxy resin, 5-10 parts of phenolic resin, 10-15 parts of polyether-ether-ketone, 3-5 parts of maleic anhydride grafted PEEK, 15-25 parts of a hydrogen-corrosion-resistant curing agent, 8-12 parts of an impermeability nano filler and 8-12 parts of elastic rubber. Through synergistic modification of the epoxy resin, the phenolic resin, the nanofiller and the PEEK and in combination with the multi-scale barrier effect of the nanofiller, the hydrogen permeability is remarkably reduced, and the compactness and mechanical properties of the composite material are ensured.

The invention discloses a continuous extrusion and continuous expansion short-process forming process for a high-purity copper strip blank regulated and controlled by an electromagnetic-ultrasonic composite field, and relates to a manufacturing technology of a copper strip. The high-purity copper is subjected to deoxidation cleaning and drying, and trace tin, phosphorus, nickel or nanometer aluminum oxide and lubricating auxiliaries are added; then carrying out continuous extrusion to prepare a belt, synchronously applying an alternating electromagnetic field and ultrasonic vibration in a continuous expansion stage, and spraying a supported assistant of a nano silicon nitride carrier loaded polyether-ether-ketone-maleimide copolymer; and finally, cooling and rolling a finished product under the protection of argon. According to the process, grains are remarkably refined, the mechanical property and the surface quality are improved, and high conductivity and fatigue durability are both considered.

The present application provides an insulated wire and a preparation method therefor, a winding wire and an electrical device, relating to the technical field of electrochemical elements. The insulated wire includes a conductive wire and an insulating layer coated on the conductive wire, where the insulating layer includes polyetheretherketone and thermoplastic polyimide, and a mass percentage of the polyetheretherketone in the insulating layer is not more than 20%; and the conductive wire is in direct contact with the insulating layer; and after extrusion and cooling for 24 h, under a condition that the insulated wire is ring cut and stretched by 15%, a length of the insulating layer losing adhesion is not greater than 1.9 mm. The present application further provides a preparation method for the above insulated wire and an electrical device using the above insulated wire. The insulated wire provided in the present application overcomes the defect of poor adhesive force between the insulating layer and the conductive wire in the prior art.

Articles may include at least non-PFAS elastomers and additives. The non-PFAS elastomers may include at least one of polyacrylate elastomer (ACM), polyethylene acrylate elastomer (AEM), ethylene propylene diene monomers (EPDM) elastomer, ethylene propylene monomers (EPM), nitrile butadiene rubbers (NBR) and hydrogenated nitrile butadiene rubbers (HNBR) elastomer. Under a six-hour remote NF3 plasma exposure at 150°C, the non-PFAS elastomers may have a weight change less than or equal to about 2%. The additives may include fillers, which include at least one of carbon black, silicon carbide, silica, barium sulfate, carbon, clay, talc, metallic fillers, metallic nitrides, and / or organic fillers. The organic fillers may include polyether ether ketone (PEEK), polyaryl ether ketone (PAEK), or nylon. The non-PFAS elastomer may have a weight percentage from about 25% to about 99%. The additives have a weight percentage from about 1% to about 67%.

The application discloses spliced self-lubricating polyether ether ketone three-layer composite plate and a preparation method thereof. The spliced self-lubricating polyether ether ketone three-layer composite plate comprises, from bottom to top, a metal base layer, a copper powder layer and a spliced self-lubricating layer connected in sequence. The spliced self-lubricating layer is composed of a plurality of wear-resistant PEEK pieces with good wear resistance and friction-reducing PEEK pieces with good friction-reducing performance arranged alternately. The friction-reducing PEEK pieces are designed to be arranged at an angle of 30-60 degrees with the horizontal direction, i.e. the friction-reducing PEEK pieces are arranged in an inclined strip shape between the wear-resistant PEEK pieces with good wear resistance. The structure design can form a complete self-lubricating friction-reducing layer during reciprocating movement of the composite plate, reduces the friction coefficient of the plate and a friction pair, and finally improves the wear resistance of the material.

This invention relates to the field of adeno-associated virus (AAV) vector technology, specifically a method for adhering AAV based on sulfonated polyetheretherketone (PEEK) and its application. The material preparation method includes the following steps: S1, adding PEEK to concentrated sulfuric acid to obtain sulfonated PEEK; S2, performing a primary polydopamine coating; S3, spin-coating a nano-silica solution onto the surface of the PEEK with primary polydopamine coating obtained in step S2; S4, performing hot-pressing treatment; S5, performing a secondary polydopamine coating; S6, adding the PEEK with secondary polydopamine coating obtained in step S4 to a hydrofluoric acid solution for reaction and cleaning; S7, adding the filtered product washed with deionized water in step S6 to an AAV solution for incubation. The AAV viral vector prepared by this invention has a large amount of adhering AAV, enabling sustained release.

This invention relates to a carbon fiber 3D printing composite material and its preparation method, belonging to the field of additive manufacturing technology. The composite material consists of the following components: 8.5-12 wt% modified carbon fiber, 0.15-0.2 wt% antioxidant, 0.3-0.4 wt% lubricant, and the balance being polyetheretherketone resin. The modified carbon fiber is formed by coupling and grafting with a surface modifier containing quaternary ammonium salt, triethoxysilane, and bibranched phenolic hydroxyl structures, which enables electrostatic anti-agglomeration of carbon fibers, physical interlocking of micro-grooves, and multiple hydrogen bond chemical bonding with PEEK. This composite material effectively solves the problems of uneven carbon fiber dispersion and poor interfacial bonding, significantly suppresses warping deformation of 3D printed parts, and greatly improves creep resistance under high temperature and high load. The composite material of this invention is suitable for 3D printing of high-performance lightweight structural components in aerospace, automotive, and robotics fields.