49 results about "Polyetherketoneketone" patented technology

The invention discloses a polyetherketoneketone high-temperature-resistant wear-resistant non-stick coating and a preparation method thereof. The coating is prepared from the following components in parts by mass: 13 to 30 parts of a resin matrix group (containing 12 to 25 parts of titanium modified polyether ketone ketone resin, 1 to 5 parts of fluorine-free viscous resin and 0.65 to 6 parts of aluminum oxide), 0.5 to 3 parts of a nano reinforced group (containing 0.5 to 3 parts of KH-550 modified nano titanium dioxide, 0.025 to 0.6 part of cerium dioxide and 0.5 to 3 parts of boron nitride) and 62 to 71 parts of an auxiliary agent group. The preparation method comprises the following steps: 1) taking diphenyl ether, paraphthaloyl chloride and isophthaloyl chloride as monomers, and synthesizing titanium modified polyether ketone ketone resins with different viscosities through segmented polymerization (1.5-2.0 hours or 3.0-4.0 hours); 2) respectively preparing a smooth bottom layer water dispersion slurry and a wrinkled surface layer water dispersion slurry; and (3) forming a compact bottom layer and a micro-wrinkle surface layer on the base material by adopting a layered spraying and stepped sintering process (280-320 DEG C, 10-20 minutes). The whole system of the coating is fluorine-free and has temperature resistance gt; the coating has the characteristics of high temperature resistance (350DEG C), wear resistance (Taber wear rate of 3-5mg / 1000r), non-sticking (contact angle gt, 100 DEG C) and heavy corrosion resistance, and is suitable for cooking utensils and chemical equipment.

The synthesis process comprises the following steps: (1) introducing inert gas into a reactor, adding a solvent, a Lewis acid catalyst and diphenyl ether, then dropwise adding an acyl chloride monomer solution, and synthesizing an intermediate M with a short-chain small molecular structure; (2) continuously dropwise adding an acyl chloride monomer solution into the reactor for reaction, and then adding an end-capping reagent for reaction; and (3) quenching, washing and drying the reaction product in the step (2) to obtain the product. Under the condition that only the Lewis acid is used as the catalyst, the one-pot method is adopted for synthesizing PEKK in two steps, side reactions can be reduced, meanwhile, the dosage of the catalyst is reduced, the production cost is reduced, the post-treatment process is simplified, and the obtained polyether ketone ketone is high in molecular weight and good in heat resistance and mechanical performance.

A process for manufacturing a polyether ketone ketone, involving: placing an aromatic ether or a mixture of aromatic ethers, including at least 50 mol % of 1,3-bis(4-phenoxybenzoyl)benzene, 1,4-bis(4-phenoxybenzoyl)benzene or a mixture thereof, relative to the total number of moles of aromatic ether(s), in contact with an acyl chloride or a mixture of acyl chlorides, and a Lewis acid, in all or part of a reaction solvent, so as to form a reaction mixture, the 1,3-bis(4-phenoxybenzoyl)benzene and / or 1,4-bis(4-phenoxybenzoyl)benzene essentially not being dissolved in the reaction solvent at the end of the step of placing in contact; and, polymerizing the reaction mixture, the polymerization being performed, at least in part, at a temperature Tp greater than or equal to 50° C.; the process including a step of gradual heating of the reaction mixture until acceleration of the polymerization reaction is achieved.

The application discloses a kind of electrospinning preparation methods of superfine, no adhesion polyether ketone ketone nanofiber membrane: polyether ketone ketone is dissolved in solvent to obtain polyether ketone ketone spinning solution;Polyether ketone ketone spinning solution is loaded in the injector of electrospinning device, and spinning is carried out;The concentration of ethanol or water in spinning environment is improved using solvent atomization between injector needle and collecting device, and polyether ketone ketone jet phase separation is accelerated;The nascent polyether ketone ketone nanofiber is collected into membrane;The fiber membrane collected is soaked in coagulation liquid to make solvent remaining in fiber precipitate, after taking out, dry, obtain polyether ketone ketone nanofiber membrane.The application realizes low concentration electrospinning using the unique interchain topological entanglement of polyether ketone ketone, and promotes phase separation by introducing solvent atomization between spinneret and collecting device, overcome the problem that other polymers are difficult to obtain continuous fiber and fiber is easy to adhere in low concentration electrospinning, and prepare superfine, no adhesion polyether ketone ketone nanofiber membrane.

The invention discloses a preparation method of polyetherketoneketone, polyetherketoneketone and application. The method comprises the following steps: (1) mixing raw materials at a first temperature, the raw materials comprising acyl chloride, a solvent, Lewis base, diphenyl ether and Lewis acid, carrying out heat preservation, heating to a second temperature, and carrying out a first reaction stage; (2) heating to a third temperature for reaction, and carrying out a second reaction stage; (3) adding a terminator into the reaction mixture in the step (2); the heating rate in the step (1) and the heating rate in the step (2) are respectively and independently 0.1-5 DEG C / min, the weight-average molecular weight of the polyetherketoneketone prepared by the method is 5000-200000, and the molecular weight distribution coefficient is 2.5-4.5. The polyetherketoneketone with relatively narrow molecular weight distribution is obtained through an electrophilic substitution path.

The invention discloses a polyetherketoneketone fiber anti-adhesion porous spinning method. The method comprises the following steps: dissolving polyetherketoneketone to obtain a spinning solution, and extruding the spinning solution through a porous spinneret plate to form a plurality of spinning trickles; the trickles enter a first coagulating bath to be preliminarily coagulated and formed, and fibers are obtained; dividing the fibers by a split type dividing plate, guiding the fibers into a second coagulating bath by a godet, washing with water, applying oil, and then drying; fibers enter the hot drafting device to be subjected to multi-stage hot drafting, and after heat setting, the fibers are tidied and wound by the buncher. The first coagulating bath is provided with a bath lotion supplementing unit, a circulating filtering system and an ultrasonic generator which are combined to quickly and uniformly update components of the coagulating bath; and the split type filament separating plate keeps a distance between fibers, prevents mutual adhesion and improves the double-diffusion efficiency in the second coagulating bath. The ultrasonic-assisted circulating filtration system is used for updating the synergistic effect of the coagulating bath and the split type filament separating plate, so that the problems that fibers are easy to adhere and are uneven in evenness and performance are effectively solved.

The invention relates to an assembly comprising a first part and a second part, each part comprising a polymer; and a film located between and adhered to the first part and the second part. The film comprises a blend of at least two poly(ether ketone ketone) (PEKK) polymers and optionally at least one nucleating agent. The assembly has improved fracture toughness and overall good mechanical properties.

Polyaryletherketone aerogels. In particular, a method of making polyaryletherketone aerogels using environmentally benign solvents for gel formation. In addition, a method is provided for 3D printing of such polyaryletherketone aerogels. The polyaryletherketone aerogels may specifically be sourced from poly(ether ether ketone) (PEEK) or poly(ether ketone ketone) (PEKK).

The invention relates to a composition comprising: a poly(ether ketone ketone), PEKK1; a thermoplastic polyimide having a glass transition temperature greater than or equal to 230°C, TPI; and optionally, a poly(aryl ether ketone), PAEK, PAEK being distinct from PEKK1. PEKK1 represents at least 50% by weight, relative to the total weight of PEKK1, TPI and, where applicable, PAEK, of the composition. PAEK is necessarily present when the TPI content is greater than or equal to 20% by weight, and preferably when the TPI content is greater than or equal to 15% by weight, relative to the total weight of PEKK1 and TPI of the composition.

The invention discloses a visual all-polymer prepared chromatographic column and a prepared chromatographic purification method thereof. The visual all-polymer prepared chromatographic column comprises a column tube made of a transparent amorphous polyether ketone ketone material and end covers connected to the two ends of the column tube, a multi-stage sealing structure is arranged between the end cover and the column tube, so that the column tube forms a continuous visual window for observing the separation process in the column in real time; the multistage sealing structure comprises at least one radial sealing ring arranged between the end cover and the inner wall of the column pipe, a buffer gasket arranged between the end face of the end cover and the end face of the column pipe, and a locking hoop used for providing axial pressing force for the radial sealing ring and the buffer gasket. The column tube provided by the invention is fully transparent, allows real-time visual observation, has high-pressure sealing reliability, high chemical inertness and good mechanical strength, and can improve the preparation and purification efficiency, intuition and reliability.

The invention relates to the field of macromolecules, and discloses a method for refining polyetherketoneketone and a polyetherketoneketone refined product. The method comprises the following steps: (1) treating a polyetherketoneketone complex by adopting a pretreatment agent; (2) the polyether ketone ketone crude product and a mixed chain supporting solution are mixed and washed, a first product is obtained, the mixed chain supporting solution comprises a main chain supporting agent and a cosolvent, the main chain supporting agent comprises one or more selected from parachlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid, the cosolvent comprises one or more selected from N, N-dimethylformamide and dimethyl sulfoxide, and the main chain supporting agent comprises one or more selected from dichlorophenol, trifluoroacetic acid, difluoroacetic acid, dichloroacetic acid and chloroacetic acid. The solvent is one or more of water, N-methyl pyrrolidone and N-methyl formamide; (3) adding a mixed aqueous solution into the first product to remove at least part of metal ions to obtain a second product; and (4) washing the second product for multiple times by using an organic solvent, and washing and drying to obtain the refined polyether ketone ketone. The content of aluminum ions in the polyetherketoneketone prepared by the method is low.

The application discloses a kind of polyether ketone ketone and preparation method thereof, the application is first added terephthaloyl chloride or isophthaloyl chloride and diphenyl ether, then under the condition of adding catalyst anhydrous aluminium chloride, low-temperature prepolymerization for a certain time, then the remaining diphenyl ether is added to complete the short-chain end-capping reaction.The application reduces the temperature in the early stage of the starting reaction process and adopts the reflux method in the selection of the washing reagent in the later stage, so that the purity and molecular weight of the obtained high molecular polymer polyether ketone ketone are high.The content of aluminum, a catalyst contained in PEKK, is lower, and the intrinsic viscosity (molecular weight) and tensile strength of the tested product are higher.

The invention relates to the technical field of multi-thread screw extrusion, in particular to a multi-thread screw extrusion system of a polyetherketoneketone composite material and a use method of the polyetherketoneketone composite material, the multi-thread screw extrusion system comprises a double-screw extruder feed hopper used for feeding the polyetherketoneketone composite material, and the double-screw extruder feed hopper comprises a hopper body; a supporting hole for mounting a connecting pipeline is formed in the hopper body; a mixing assembly is installed in the middle of the upper end of a feeding hopper of the double-screw extruder, and four sets of batching pipelines with the adjacent included angles being 90 degrees are installed on the periphery of the upper end of the mixing assembly. Various materials can be preliminarily mixed before entering the double-screw extruder, so that the mixing uniformity degree in the material processing process is improved, and the mixing efficiency is improved; and meanwhile, in the process that the materials enter the material mixing assembly, collision can occur, dust on the surfaces of the materials can be raised conveniently, the dust can be treated in time in cooperation with the arranged dust removal assembly, and the production quality is effectively improved.

The invention discloses a production method and application of polyetherketoneketone, and relates to the technical field of polymer synthesis. The production method of the polyetherketoneketone comprises the following steps: a method I: in an inert atmosphere, carrying out polymerization reaction on acyl chloride and diphenyl ether in the presence of Lewis base, Lewis acid and a reaction solvent for a period of time, adding a fluorine-containing end-capping reagent, and continuously reacting for 2-5 hours to obtain end-capped polyetherketoneketone; or the method II comprises the following steps: in an inert atmosphere, carrying out polymerization reaction on acyl chloride, diphenyl ether and a fluorine-containing end-capping reagent in the presence of Lewis base, Lewis acid and a reaction solvent to obtain the end-capped polyether ketone ketone. The fluorine-containing end-capping reagent is adopted for end capping of PEKK, so that the molecular weight and molecular weight distribution of PEKK are effectively controlled, the thermal stability and chemical inertness of the end group of PEKK are remarkably enhanced, and the hydrophobicity of PEKK is improved.

The invention discloses a method for preparing polyetherketoneketone and polyetherketoneketone prepared through the polyetherketoneketone, and the method comprises the steps that 1, a first part of raw materials, diphenyl ether and a solvent are added into a reaction container, and the first part of raw materials comprise part of lewis acid and part of lewis base; (2) adding a first acyl chloride solution at a first dropwise adding rate; (3) after heating, adding a second part of raw materials, and dropwise adding a second acyl chloride solution at a second dropwise adding rate, the second part of raw materials comprising the rest Lewis acid and Lewis base, and the molar ratio of the Lewis acid and Lewis base in the first part of raw materials to the Lewis acid and Lewis base in the second part of raw materials is (5-9): (5-1); the mass ratio of acyl chloride in the first acyl chloride solution to acyl chloride in the second acyl chloride solution is (5-9): (5-1), and the first dropwise adding rate and the second dropwise adding rate are 2.2% vol / min-6. 6% vol / min. The polyetherketoneketone prepared by the method is narrow in molecular weight distribution.

The application discloses a method for preparing polyether ketone ketone and polyether ketone ketone prepared by the method, and the method comprises the following steps: (1) adding a first part of raw materials and diphenyl ether and a solvent into a reaction container, wherein the first part of raw materials comprises part of a Lewis acid and part of a Lewis base; (2) adding a first acyl chloride solution at a first dropping speed; (3) after temperature rising, adding a second part of raw materials and adding a second acyl chloride solution at a second dropping speed, wherein the second part of raw materials comprises the remaining Lewis acid and Lewis base, the molar ratio of the Lewis acid and the Lewis base in the first part of raw materials to the Lewis acid and the Lewis base in the second part of raw materials is (5-9):(5-1), the mass ratio of acyl chloride in the first acyl chloride solution to acyl chloride in the second acyl chloride solution is (5-9):(5-1), and the first and second dropping speeds are 2.2%vol / min-6.6%vol / min. The polyether ketone ketone prepared by the method has a narrow molecular weight distribution.

The invention discloses a preparation method of a 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex, and belongs to the technical field of polymer monomer preparation, aromatic diacyl chloride and aromatic ether are used as raw materials, a crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is continuously synthesized under the catalysis condition of a Lewis acid catalyst, and the crude product of the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex is subjected to post-treatment to obtain the 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex. The high-purity 1, 4-bis (4-phenoxy benzoyl) benzene-AlCl3 complex can be used as a polyether ketone ketone active monomer, and the effect of the active monomer can be exerted without adding aluminum in the polymerization reaction process.

The application discloses a method for improving the hydrophilicity of a PEKK chromatographic column screen plate by surface treatment and a modified screen plate thereof, relates to the technical field of PEKK chromatographic column screen plates, and comprises a screen plate, wherein the base material of the screen plate is polyether ketone ketone (PEKK) containing a diketone group (-CO-CO-) in the molecular structure. The application realizes efficient and directional surface modification by precisely utilizing the unique diketone group of PEKK as an advantageous modification site through a series of structures. The strong anchoring effect of the diketone group makes the formed hydrophilic layer combined with the base material exceptionally firmly, and significantly improves the durability of the coating. Compared with a traditional PEEK screen plate, the product can effectively inhibit bubble generation and retention in a high-aqueous-phase mobile phase, thereby ensuring stable system pressure and obtaining a smooth baseline, and finally greatly improving the reproducibility, sensitivity and column efficiency of chromatographic analysis.

The present invention relates to a method for producing polyetherketoneketone (PEKK). The method for producing PEKK includes the steps of: a) mixing 1,4-EKKE, terephthaloyl chloride (TCL) and isophthaloyl chloride (ICL) with an aprotic solvent under cooling to obtain a reaction solution; b) mixing a Lewis acid and the reaction solution to obtain a product mixture containing a PEKK-Lewis acid complex; c) deactivating the PEKK-Lewis acid complex by contacting the product mixture obtained in step b) with an aliphatic alcohol and subsequently adding water to obtain PEKK, where the amount of water in step c) is not less than 25 wt% of the total amount of aprotic solvent and aliphatic alcohol; d) isolating the PEKK obtained in step c) by washing with a protic solvent and drying. The method provides for the production of recyclable PEKK under conditions in which the reaction medium formed during synthesis has low corrosivity, thus making it possible to reduce the likelihood of metals from the material of the reaction equipment being incorporated into the resulting polymer powder.

The present invention belongs to the technical field of composite materials, and in particular to a carbon fiber reinforced thermoplastic resin-based composite material and its preparation method and application. The material preparation steps are as follows: preparing a polyetherketoneketone suspension, using the polyetherketoneketone suspension to prepare carbon fiber reinforced polyetherketoneketone prepregs with carbon fiber contents of 60-80wt%, 40-60wt% and 20-40wt% respectively; mixing polyetherketoneketone powder and nanofiller, and spraying them onto the surface of the obtained carbon fiber reinforced polyetherketoneketone prepreg; laying the obtained carbon fiber reinforced polyetherketoneketone prepregs in the order of carbon fiber content from low to high on a surface layer without carbon fiber; and forming by hot pressing with the aid of infrared radiation heating to obtain the carbon fiber reinforced thermoplastic composite material; the carbon fiber reinforced thermoplastic composite material of the present invention has both anti-low temperature medium leakage, anti-static function and excellent mechanical strength.

A powder composition suitable for use in selective laser sintering for printing an object. The powder composition includes a first fraction having a polyetherketoneketone (PEKK) powder having a plurality of particles. The powder composition includes a second fraction having a plurality of siloxane particles that is dry blended with the PEKK powder prior to selective laser sintering of the powder. In some embodiments, the powder composition includes a third fraction of carbon fiber. The powder composition when used in selective laser sintering results in parts with more consistent results and improves process economics.

The invention discloses a production process of fine powder polyetherketoneketone, and belongs to the technical field of high-molecular polymer preparation, aromatic ether and aromatic diacyl chloride are used as raw materials, and the fine powder polyetherketoneketone is prepared through continuous flow reaction prepolymerization, molecular weight regulation, intermittent kettle type polymerization and post-treatment under the catalytic action of Lewis acid. The method is characterized in that the homogenized and sheared raw materials are subjected to prepolymerization and molecular weight regulation and control processes in a reactor with strong mass and heat transfer characteristics, so that the problems of wall adhesion and scaling in the traditional process can be avoided, rapid nucleation is induced to produce a fine powdery polyether ketone ketone product of which the average particle size is not greater than 100 microns, and the fine powdery material is easy to post-treat and purify and has good industrial application prospects. The production cost and the three-waste output are obviously reduced.

The present invention relates to blends of poly(ether ketone ketone) (PEKK) polymers, in particular to certain blends endowed with lower melting point than traditional PEKK polymers, yet maintaining high crystallinity and rapid crystallization behaviour, which are composed of a major amount of a first nucleophilic PEKK having a first T / I ratio, and a minor amount of a second PEKK having a second T / I ratio higher than the first T / I ratio; to methods of making the same, and to uses thereof in various fields.

The invention discloses a preparation method of high-purity 1, 4-bis (4-phenoxy benzoyl) benzene, and belongs to the technical field of preparation of high-purity polymeric monomers, crude 1, 4-bis (4-phenoxy benzoyl) benzene is used as a raw material, and high-purity and high-crystallinity 1, 4-bis (4-phenoxy benzoyl) benzene is prepared through an impurity induction separation process and a temperature control circulation crystal growing technology. The preparation method comprises the following steps: preparing 1, 4-bis (4-phenoxy benzoyl) benzene; the invention provides an application scheme of a crystal form inducer and a corresponding crystallization control strategy thereof, so that high purity and high crystallinity of 1, 4-bis (4-phenoxy benzoyl) benzene are ensured; the obtained high-purity 1, 4-bis (4-phenoxy benzoyl) benzene can be used for synthesizing high-quality polyetherketoneketone, and the negative influence of impurities on the performance of a material is remarkably reduced, so that the excellent quality of a polyetherketoneketone product is guaranteed.

The application discloses a production method of polyether ketone ketone and application thereof, and relates to the technical field of polymer synthesis. The production method of the polyether ketone ketone comprises the following steps: method one: in an inert atmosphere, acyl chloride and diphenyl ether are subjected to polymerization reaction for a period of time in the presence of a Lewis base, a Lewis acid and a reaction solvent, then a fluorine-containing end-capping agent is added and the reaction is continued for 2-5 hours to obtain an end-capped polyether ketone ketone; or method two: in an inert atmosphere, acyl chloride, diphenyl ether and the fluorine-containing end-capping agent are subjected to polymerization reaction in the presence of the Lewis base, the Lewis acid and the reaction solvent to obtain the end-capped polyether ketone ketone. The fluorine-containing end-capping agent is used to end-cap the PEKK, the molecular weight and the molecular weight distribution of the PEKK are effectively controlled, the thermal stability and the chemical inertness of end groups of the PEKK are significantly enhanced, and the hydrophobicity of the PEKK is improved.

The application discloses a kind of carbon fiber reinforced polyether ketone ketone sealing materials and preparation method thereof, belong to high polymer composite material technical field.The sealing material is made of the following weight parts of component: polyether ketone ketone 65~80 parts, short carbon fiber 15~25 parts, molybdenum disulfide 2~5 parts, graphite 3~8 parts, coupling agent 0.5~2 parts;The each component is uniformly dispersed in polyether ketone ketone matrix.Its preparation method includes: polyether ketone ketone is dissolved in high polarity organic solvent to form solution, short carbon fiber is dispersed to the solution and is pre-composited, is dry and is crushed after with molybdenum disulfide, graphite and coupling agent are blended, and through melt extrusion manufacturing composite master batch, and the sealing material is obtained by injection molding.The application realizes uniform dispersion and firm interface combination of carbon fiber in polyether ketone ketone matrix by solution method, and the crystallinity of polyether ketone ketone is effectively reduced.The obtained sealing material has excellent compression resistance, high temperature dimensional stability and strong acid corrosion resistance, and can be widely applied to the sealing field under harsh working conditions such as high temperature and strong corrosion.

The utility model relates to the technical field of processing equipment, and discloses a feeding device for wet processing of polyetherketoneketone composite powder, which comprises a wet processing box and a feeding port, the feeding port is arranged on the inner wall of the top of the wet processing box, a feeding mechanism is arranged on the wet processing box, an auxiliary mechanism is arranged on the feeding mechanism, and the auxiliary mechanism is arranged on the feeding mechanism. The feeding mechanism comprises an annular groove, the annular groove is formed in the inner wall of the top of the wet processing box, a discharging port is formed in the inner wall of the top of the annular groove, a shaft sleeve plate is clamped to the outer wall of the top of the wet processing box, an inner ring of the shaft sleeve plate is rotationally connected with a preset cylinder through a bearing, and a graduated scale is fixedly connected to the outer wall of the front side of the preset cylinder. And the inner wall of the top of the preset cylinder is slidably connected with a piston plate. According to the utility model, the shaft sleeve plate, the preset cylinder and other structures are arranged, so that the problems that when fillers such as solid and solid-liquid mixture enter among different processes, solvents are easy to volatilize or toxic substances are easy to diffuse, the mixing ratio dosage is inconvenient to control in advance, and processed composite materials are easy to have different quality levels are solved.

The application discloses a modified polyether ketone ketone composite material and a preparation method and application thereof, and relates to the technical field of composite materials, in particular to a modified polyether ketone ketone composite material, which comprises a sulfonated porous composite support, a chemotactic factor and a methacrylamide crystal glue; the preparation raw material of the sulfonated porous composite support comprises polyether ketone ketone and strontium-cerium doped bioactive glass; the chemotactic factor and the methacrylamide crystal glue are loaded in the pores of the sulfonated porous composite support. The three-dimensional porous composite support prepared by adopting PEKK and BG is used as the main body of the composite material, the chemotactic factor and the GelMA crystal glue are loaded in the pores, so that the immune regulation characteristics and the bone induction property of the PEKK-based support are enhanced; the prepared modified polyether ketone ketone composite material can significantly promote the proliferation and osteogenic differentiation of mesenchymal stem cells, is beneficial to the recruitment and polarization of macrophages, has a good bone formation effect in the immune-bone cascade reaction, and can accelerate the osteogenic differentiation process of the mesenchymal stem cells after being co-cultured with the macrophages.

The invention relates to the technical field of polyether ketone ketone materials, and provides PEKK spherical powder prepared through ultrasonic-assisted TIPS and a preparation method and device of the PEKK spherical powder. The method comprises the steps that an organic solvent serves as a solvent, and a homogeneous solution containing polyether ketone ketone is obtained; and cooling the homogeneous solution to a liquid-liquid phase separation temperature interval of the polyetherketoneketone-solvent system at a cooling rate of 0.1-5 DEG C / min under the action of ultrasonic waves. Through the cavitation effect and the mechanical effect of ultrasonic waves, the nucleation and growth process of PEKK is effectively regulated and controlled, an effective quenching temperature window is widened, and then powder with high sphericity and narrow particle size distribution can be obtained more controllably. Furthermore, by optimizing ultrasonic parameters and cooling process parameters, the sphericity, particle size distribution uniformity and fluidity of the powder are remarkably improved, and the problems that the PEKK powder prepared through a traditional TIPS method is irregular in morphology and wide in particle size distribution are solved.