Polyether-ether-ketone polishing brush wire material and preparation method thereof

Abstract

The invention discloses a polyether-ether-ketone polishing brush wire material and a preparation method thereof, and belongs to the technical field of brush wire material preparation. The polyether-ether-ketone polishing brush wire material is prepared from, by weight, 50-70 parts of polyether-ether-ketone, 8-13 parts of a modified flexibilizer, 5-10 parts of a modified stabilizer, 3-6 parts of a light stabilizer, 6-12 parts of a lubricant and 2-5 parts of graphite, the modified flexibilizer is prepared from allyl glycidyl ether, benzyl dimethyl silane, vinyl acetic acid and 4-methoxyphenol, and the modified flexibilizer is prepared from vinyl acetate and 4-methoxyphenol. The modified stabilizer is prepared from pentafluorobenzoic acid, potassium tert-butoxide, 1, 10-phenanthroline, pentafluorobromobenzene, 4-aminophenol and pyromellitic dianhydride. The polyether-ether-ketone polishing brush wire material prepared by the method has excellent toughness, organic solvent resistance and wear resistance.

Description

Technical Field

[0001] The invention belongs to the technical field of brush wire material preparation, and in particular relates to a polyetheretherketone polishing brush wire material and a preparation method thereof. Background Art

[0002] Polyetheretherketone polishing brush wire material is known for its excellent high temperature resistance. It can work stably at a working temperature of up to 250℃ and can even withstand a high temperature of 300℃ instantly. This is especially important for polishing brush wires that need to operate in a high temperature environment for a long time. In addition, polyetheretherketone material can still maintain high strength and rigidity at high temperatures, while showing excellent creep resistance, ensuring its service life in high temperature environments. Due to its tight molecular chain structure, it has excellent wear resistance and is suitable for polishing operations that require strict low friction coefficients and wear resistance. At the same time, polyetheretherketone exhibits excellent corrosion resistance to most chemicals, including highly corrosive substances such as concentrated sulfuric acid.

[0003] However, despite the many advantages of polyetheretherketone polishing brush wire materials, they also have some shortcomings. First, polyetheretherketone materials are relatively brittle and have poor shear properties, which to a certain extent limits their application in situations that require high toughness. Secondly, polyetheretherketone polishing brush wire materials have limited resistance to organic solvents and are not resistant to polar organic solvents such as ketones, esters, and chloroform; at the same time, polyetheretherketone materials have relatively weak impact resistance and low elongation strain at break, making them unsuitable for use in strong impact environments. The existence of these defects has, to a certain extent, affected the scope of use of polyetheretherketone polishing brush wires.

[0004] Patent CN113774497B discloses a PEEK material drawing process and its application in electronic cigarette cleaning brushes. The drawing process includes: drying the polyetheretherketone granular raw material in a dryer; heating and melting the dried polyetheretherketone material granules in an extruder to obtain molten polyetheretherketone; filtering the molten polyetheretherketone material through a filtering device; extruding the filtered molten polyetheretherketone material through a high-temperature screw and a spinneret to form polyetheretherketone monofilaments; pulling the polyetheretherketone monofilaments into a hot air device for qualitative curing to obtain polyetheretherketone brush filaments; winding the polyetheretherketone brush filaments on a winding device for collection, and the obtained cleaning brush has good wear resistance and flame retardant properties, but the toughness, organic solvent resistance and wear resistance of the polyetheretherketone material prepared by this method still have room for improvement. Summary of the invention

[0005] The object of the present invention is to provide a polyetheretherketone polishing brush wire material and a preparation method thereof, so as to solve the technical problems of poor toughness, organic solvent resistance and wear resistance of the polyetheretherketone polishing brush wire material in the prior art.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: The invention provides a polyetheretherketone polishing brush wire material, which is composed of the following components in parts by weight: 50-70 parts of polyetheretherketone, 8-13 parts of a modified toughening agent, 5-10 parts of a modified stabilizer, 3-6 parts of a light stabilizer, 6-12 parts of a lubricant, and 2-5 parts of graphite, wherein the modified toughening agent is prepared from allyl glycidyl ether, benzyldimethylsilane, vinylacetic acid and 4-methoxyphenol, and the modified stabilizer is prepared from pentafluorobenzoic acid, potassium tert-butoxide, 1,10-phenanthroline, pentafluorobromobenzene, 4-aminophenol and pyromellitic dianhydride.

[0007] Preferably, the method for preparing the modified toughening agent comprises the following steps: Q1: Under nitrogen protection, allyl glycidyl ether and Karstedt catalyst are added to a container equipped with a dropping funnel, a condenser and a thermometer, heated and stirred, and then benzyldimethylsilane is added to the dropping funnel, and the dropping time is controlled. After the dropping is completed, the temperature is raised to continue the reaction. After the reaction is completed, adsorption, decolorization, and reduced pressure distillation are performed to obtain an intermediate product; Q2: Add the intermediate product into a container, heat and stir, then drop vinyl acetic acid, tetrabutylammonium bromide and 4-methoxyphenol, control the dropping time, heat and react to obtain a modified toughening agent.

[0008] In the above process, the synthesis process of the modified toughening agent is as follows: The results of mass spectrometry analysis of the intermediate products were: m / z: 250.14 (100.0%), 251.14 (20.3%), 252.14(4.5%), 252.15 (1.1%); the results of mass spectrometry analysis of the modified toughening agent were: m / z: 336.18 (100.0%), 337.18(25.0%), 338.18 (3.7%), 338.17 (3.3%), 339.18 (1.0%).

[0009] Preferably, in Q1, the molar ratio of allyl glycidyl ether to benzyl dimethyl silane is (1-1.2): (0.9-1.1), the heating and stirring temperature is 60-70°C, the stirring time is 10-15min, the dropwise addition time is controlled to be 60-80min, the temperature is increased to 80-90°C at a heating rate of 10°C / h, the reaction is continued for 6-8h, and activated carbon is added for adsorption.

[0010] Preferably, in Q2, the molar ratio of the intermediate product to vinyl acetic acid is (0.9-1.2): (0.8-1.2), the heating and stirring time is 80-85°C, the dropwise addition time is controlled to be 60-80min, the heating reaction temperature is 90-105°C, and the reaction time is 3-6h.

[0011] Preferably, the preparation method of the modified stabilizer comprises the following steps: S1: adding pentafluorobenzoic acid and ethanol into a container, stirring and dissolving to obtain a mixed solution 1, adding potassium tert-butoxide into ethanol, stirring and dissolving to obtain a mixed solution 2, slowly dropping the mixed solution 2 into the mixed solution 1, controlling the dropping time, stirring for reaction, rotary evaporation, adding ether, filtering, washing, and vacuum drying to obtain product A; S2: Add product A, cuprous iodide and 1,10-phenanthroline into a container, replace the air, add diethylene glycol methyl ether and pentafluorobromobenzene, heat to react, cool, dilute, filter, wash, dry, filter, vacuum concentrate, purify, and obtain product B; S3: adding product B, 4-aminophenol, cesium carbonate and N,N-dimethylformamide into a container, heating for reaction, cooling, diluting, washing, drying, filtering, vacuum concentrating and purifying after the reaction is completed to obtain product C; S4: Add product C and N-methylpyrrolidone into a container, stir and dissolve under argon atmosphere, then add pyromellitic dianhydride, stir at room temperature, and perform heat treatment to obtain a modified stabilizer.

[0012] In the above process, the synthesis process of the modified stabilizer is as follows: The results of mass spectrometry analysis of product A were: m / z: 249.95 (100.0%), 250.95 (7.7%), 251.94 (7.2%); the results of mass spectrometry analysis of product B were: m / z: 333.98 (100.0%), 334.99 (13.0%); the results of mass spectrometry analysis of product C were: m / z: 512.08 (100.0%), 513.08 (26.2%), 514.08 (3.9%).

[0013] Preferably, in S1, the amount ratio of pentafluorobenzoic acid to potassium tert-butoxide is (2.12-3.18) g: (1.12-1.98) g, the dropping time is 30-45 min, the stirring reaction temperature is 28-32 ° C, the time is 120-180 min, and the reaction is washed with ethanol and ether in turn. The vacuum drying temperature is 30-40 ° C, and the time is 10-12 h; in S2, the product A, cuprous iodide, 1,10-phenanthroline, diethyl The dosage ratio of glycol methyl ether and pentafluorobromobenzene is (0.19-0.38) g: (0.019-0.035) g: (0.018-0.026) g: (2-5) mL: (0.12-0.22) g, the heating reaction temperature is 120-140°C, the reaction time is 36-42h, diluted with ethyl acetate, washed with distilled water and saturated sodium chloride in turn, and dried with anhydrous sodium sulfate. The eluent in the purification process is petroleum ether.

[0014] Preferably, in S3, the amount ratio of product B, 4-aminophenol, cesium carbonate and N,N-dimethylformamide is (0.17-0.33) g: (0.12-0.22) g: (0.26-0.49) g: (1-2) mL, the heating reaction temperature is 110-130°C, the time is 12-14 h, diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in sequence, and dried with anhydrous sodium sulfate. The eluent in the purification process is a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:1.

[0015] Preferably, in S4, the amount ratio of product C, N-methylpyrrolidone and pyromellitic dianhydride is (0.51-1.01) g: (2-5) mL: (0.22-0.42) g, the stirring and dissolving time is 3-5 h, the stirring time at room temperature is 20-24 h, and the heat treatment process is: first heating at 150 ° C for 30 min, then heating at 200 ° C for 30 min, and finally heating at 250 ° C for 60 min.

[0016] Preferably, the method for preparing the polyetheretherketone polishing brush filament material comprises the following steps: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, light stabilizer, lubricant and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The present invention first uses allyl glycidyl ether, benzyl dimethyl silane, vinyl acetic acid and 4-methoxyphenol as raw materials to prepare a modified toughening agent, then uses pentafluorobenzoic acid, potassium tert-butoxide, 1,10-phenanthroline, pentafluorobromobenzene, 4-aminophenol and pyromellitic dianhydride as raw materials to prepare a modified stabilizer, and the modified toughening agent and the modified stabilizer are mixed with polyetheretherketone to prepare a polyetheretherketone polishing brush wire material with excellent toughness, resistance to polar solvents and wear resistance.

[0018] 2. The present invention adds the prepared modified toughening agent to the polyetheretherketone polishing brush wire material, which can effectively improve its toughness. The ester group contained in the modified toughening agent can form hydrogen bonds with the ketone group and ether bond in the polyetheretherketone molecular chain, thereby enhancing the interfacial adhesion between the two. The addition of the modified toughening agent can also change the arrangement of the polyetheretherketone molecular chain, reduce the formation of the polymer lattice, and make it easier to deform when subjected to force, thereby improving toughness. At the same time, the modified toughening agent exists in the form of tiny particles in the polyetheretherketone, so that it can absorb energy when subjected to external force, and play a role in dispersing stress, thereby preventing the polyetheretherketone material from brittle fracture. The addition of the modified toughening agent can also prompt the polyetheretherketone to form a more complex network structure, so that it can better disperse and transfer stress when subjected to external force, thereby improving the overall toughness of the material.

[0019] 3. The present invention adds the prepared modified stabilizer to the polyetheretherketone polishing brush wire material, which can effectively improve its wear resistance and resistance to polar solvents. The fluorine atoms contained in the modified stabilizer form more hydrogen bonds and dipole-dipole interactions between the substances. When added to the polyetheretherketone material, it makes it more difficult to dissolve and swell in polar solvents, thereby improving its resistance to polar solvents. At the same time, the addition of fluorine atoms can also enhance the rigidity of the molecular chain of the modified stabilizer, making it more difficult to deform when subjected to external forces, thereby improving the wear resistance of the material. The introduction of fluorine atoms can also reduce the sliding friction between the molecular chains in the composite stabilizer, making it less likely to produce scratches and wear particles on the surface of the polyetheretherketone material, thereby improving the wear resistance of the material. DETAILED DESCRIPTION

[0020] The following will be described clearly and completely in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1: This example discloses a method for preparing a modified toughening agent, comprising the following steps: Q1: Under nitrogen protection, 0.8 g of allyl glycidyl ether and 0.005 g of Karstedt catalyst were added to a container equipped with a dropping funnel, a condenser and a thermometer, heated and stirred at 70°C for 15 min, and then 1 g of benzyldimethylsilane was added to the dropping funnel. The dropping time was controlled to be 60 min. After the dropping was completed, the temperature was raised to 80°C at a heating rate of 10°C / h and the reaction was continued for 8 h. After the reaction was completed, activated carbon was added for adsorption, decolorization, and reduced pressure distillation was performed to obtain an intermediate product; Q2: Add 27.52g of the intermediate product into a container, heat and stir at 85°C, then drop 8.6g of vinyl acetic acid, 0.28g of tetrabutylammonium bromide and 0.07g of 4-methoxyphenol, control the dropping time to 60min, heat at 95°C for 6h to obtain a modified toughening agent.

[0022] This embodiment discloses a method for preparing a modified stabilizer, comprising the following steps: S1: Add 2.65 g of pentafluorobenzoic acid and 10 mL of ethanol to a container, stir and dissolve to obtain a mixed solution 1, add 1.55 g of potassium tert-butoxide to 10 mL of ethanol, stir and dissolve to obtain a mixed solution 2, slowly drop the mixed solution 2 into the mixed solution 1, control the dropping time to 30 min, stir and react at 32 ° C for 180 min, rotary evaporate, add ether, filter, wash with ethanol and ether in turn, and vacuum dry at 40 ° C for 12 h to obtain product A; S2: 0.29 g of product A, 0.027 g of cuprous iodide and 0.022 g of 1,10-phenanthroline were added to a container, and after replacing the air, 3.5 mL of diethylene glycol methyl ether and 0.17 g of pentafluorobromobenzene were added, and the mixture was heated at 140°C for 42 h. After the reaction was completed, the mixture was cooled, diluted with ethyl acetate, filtered, washed with distilled water and saturated sodium chloride in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was petroleum ether, and product B was obtained; S3: 0.25 g of product B, 0.17 g of 4-aminophenol, 0.36 g of cesium carbonate and 1.5 mL of N,N-dimethylformamide were added to a container, heated at 130°C for 14 h, cooled after the reaction, diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:1, to obtain product C; S4: 0.76 g of product C and 3.5 mL of N-methylpyrrolidone were added to a container, stirred for 5 h under an argon atmosphere, and then 0.32 g of pyrophthalic anhydride was added. After stirring at room temperature for 24 h, heat treatment was performed. The heat treatment process was: first heated at 150°C for 30 min, then heated at 200°C for 30 min, and finally heated at 250°C for 60 min to obtain a modified stabilizer.

[0023] The present embodiment discloses a polyetheretherketone polishing brush wire material, which is composed of the following components in weight: 60 parts of polyetheretherketone, 10.5 parts of a modified toughening agent, 7.5 parts of a modified stabilizer, 4.5 parts of an ultraviolet absorber UV-326, 9 parts of chromium trioxide, and 3.5 parts of graphite.

[0024] This embodiment discloses a method for preparing a polyetheretherketone polishing brush filament material, comprising the following steps: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, ultraviolet absorber UV-326, chromium trioxide and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

[0025] Example 2: This example discloses a method for preparing a modified toughening agent, comprising the following steps: Q1: Under nitrogen protection, 0.76g of allyl glycidyl ether and 0.005g of Karstedt catalyst were added to a container equipped with a dropping funnel, a condenser and a thermometer, heated and stirred at 70°C for 15min, and then 1.1g of benzyldimethylsilane was added to the dropping funnel. The dropping time was controlled to be 60min. After the dropping was completed, the temperature was raised to 80°C at a heating rate of 10°C / h and the reaction was continued for 8h. After the reaction was completed, activated carbon was added for adsorption, decolorization, and reduced pressure distillation was performed to obtain an intermediate product; Q2: Add 23.58g of the intermediate product into a container, heat and stir at 85°C, then drop 10.32g of vinyl acetic acid, 0.26g of tetrabutylammonium bromide and 0.066g of 4-methoxyphenol, control the dropping time to 60min, heat at 95°C for 6h to obtain a modified toughening agent.

[0026] This embodiment discloses a method for preparing a modified stabilizer, comprising the following steps: S1: Add 2.12 g of pentafluorobenzoic acid and 10 mL of ethanol to a container, stir and dissolve to obtain a mixed solution 1, add 1.98 g of potassium tert-butoxide to 10 mL of ethanol, stir and dissolve to obtain a mixed solution 2, slowly drop the mixed solution 2 into the mixed solution 1, control the dropping time to 30 min, stir and react at 32 ° C for 180 min, rotary evaporate, add ether, filter, wash with ethanol and ether in turn, and vacuum dry at 40 ° C for 12 h to obtain product A; S2: 0.19 g of product A, 0.019 g of cuprous iodide and 0.018 g of 1,10-phenanthroline were added to a container, and after replacing the air, 5 mL of diethylene glycol methyl ether and 0.22 g of pentafluorobromobenzene were added, and the mixture was heated at 140°C for 42 h. After the reaction was completed, the mixture was cooled, diluted with ethyl acetate, filtered, washed with distilled water and saturated sodium chloride in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was petroleum ether, and product B was obtained; S3: 0.17 g of product B, 0.12 g of 4-aminophenol, 0.26 g of cesium carbonate and 2 mL of N,N-dimethylformamide were added to a container, heated at 130°C for 14 h, cooled after the reaction, diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:1, to obtain product C; S4: Add 0.51 g of product C and 5 mL of N-methylpyrrolidone into a container, stir for 5 h under argon atmosphere, then add 0.42 g of isophthalic anhydride, stir at room temperature for 24 h, and then heat treat. The heat treatment process is: first heat at 150°C for 30 min, then heat at 200°C for 30 min, and finally heat at 250°C for 60 min to obtain a modified stabilizer.

[0027] The present embodiment discloses a polyetheretherketone polishing brush wire material, which is composed of the following components in parts by weight: 70 parts of polyetheretherketone, 8 parts of modified toughening agent, 10 parts of modified stabilizer, 6 parts of ultraviolet absorber UV-326, 12 parts of chromium trioxide, and 5 parts of graphite.

[0028] This embodiment discloses a method for preparing a polyetheretherketone polishing brush filament material, comprising the following steps: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, ultraviolet absorber UV-326, chromium trioxide and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

[0029] Example 3: This example discloses a method for preparing a modified toughening agent, comprising the following steps: Q1: Under nitrogen protection, 0.912 g of allyl glycidyl ether and 0.005 g of Karstedt catalyst were added to a container equipped with a dropping funnel, a condenser and a thermometer, heated at 70°C with stirring for 15 min, and then 0.9 g of benzyldimethylsilane was added to the dropping funnel. The dropping time was controlled to be 60 min. After the dropping was completed, the temperature was raised to 80°C at a heating rate of 10°C / h and the reaction was continued for 8 h. After the reaction was completed, activated carbon was added for adsorption, decolorization, and reduced pressure distillation was performed to obtain an intermediate product; Q2: Add 31.44 g of the intermediate product into a container, heat and stir at 85°C, then drop 6.88 g of vinyl acetic acid, 0.3 g of tetrabutylammonium bromide and 0.07 g of 4-methoxyphenol, control the dropping time to 60 min, heat at 95°C for 6 h to obtain a modified toughening agent.

[0030] This embodiment discloses a method for preparing a modified stabilizer, comprising the following steps: S1: Add 3.18 g of pentafluorobenzoic acid and 10 mL of ethanol to a container, stir and dissolve to obtain a mixed solution 1, add 1.12 g of potassium tert-butoxide to 10 mL of ethanol, stir and dissolve to obtain a mixed solution 2, slowly drop the mixed solution 2 into the mixed solution 1, control the dropping time to 30 min, stir and react at 32 ° C for 180 min, rotary evaporate, add ether, filter, wash with ethanol and ether in turn, and vacuum dry at 40 ° C for 12 h to obtain product A; S2: 0.38 g of product A, 0.035 g of cuprous iodide and 0.026 g of 1,10-phenanthroline were added to a container, and after replacing the air, 2 mL of diethylene glycol methyl ether and 0.12 g of pentafluorobromobenzene were added, and the mixture was heated at 140°C for 42 h. After the reaction was completed, the mixture was cooled, diluted with ethyl acetate, filtered, washed with distilled water and saturated sodium chloride in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was petroleum ether, and product B was obtained; S3: 0.33 g of product B, 0.22 g of 4-aminophenol, 0.49 g of cesium carbonate and 1 mL of N,N-dimethylformamide were added to a container, heated at 130°C for 14 h, cooled after the reaction, diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:1, to obtain product C; S4: 1.01 g of product C and 2 mL of N-methylpyrrolidone were added to a container, stirred for 5 h under an argon atmosphere, and then 0.22 g of pyrophthalic anhydride was added. After stirring at room temperature for 24 h, heat treatment was performed. The heat treatment process was as follows: first, heating at 150°C for 30 min, then heating at 200°C for 30 min, and finally heating at 250°C for 60 min to obtain a modified stabilizer.

[0031] The present embodiment discloses a polyetheretherketone polishing brush wire material, which is composed of the following components in parts by weight: 50 parts of polyetheretherketone, 13 parts of a modified toughening agent, 5 parts of a modified stabilizer, 3 parts of an ultraviolet absorber UV-326, 6 parts of chromium trioxide, and 2 parts of graphite.

[0032] This embodiment discloses a method for preparing a polyetheretherketone polishing brush filament material, comprising the following steps: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, ultraviolet absorber UV-326, chromium trioxide and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

[0033] Example 4: This example discloses a method for preparing a modified toughening agent, comprising the following steps: Q1: Under nitrogen protection, 0.78g of allyl glycidyl ether and 0.005g of Karstedt catalyst were added to a container equipped with a dropping funnel, a condenser and a thermometer, heated at 70°C with stirring for 15min, and then 0.95g of benzyldimethylsilane was added to the dropping funnel. The dropping time was controlled to be 60min. After the dropping was completed, the temperature was raised to 80°C at a heating rate of 10°C / h and the reaction was continued for 8h. After the reaction was completed, activated carbon was added for adsorption, decolorization, and reduced pressure distillation was performed to obtain an intermediate product; Q2: Add 25.54 g of the intermediate product into a container, heat and stir at 85°C, then drop 7.47 g of vinyl acetic acid, 0.26 g of tetrabutylammonium bromide and 0.066 g of 4-methoxyphenol, control the dropping time to 60 min, heat at 95°C for 6 h to obtain a modified toughening agent.

[0034] This embodiment discloses a method for preparing a modified stabilizer, comprising the following steps: S1: Add 2.37 g of pentafluorobenzoic acid and 10 mL of ethanol to a container, stir and dissolve to obtain a mixed solution 1, add 1.37 g of potassium tert-butoxide to 10 mL of ethanol, stir and dissolve to obtain a mixed solution 2, slowly drop the mixed solution 2 into the mixed solution 1, control the dropping time to 30 min, stir and react at 32° C. for 180 min, rotary evaporate, add ether, filter, wash with ethanol and ether in turn, and vacuum dry at 40° C. for 12 h to obtain product A; S2: 0.25 g of product A, 0.021 g of cuprous iodide and 0.02 g of 1,10-phenanthroline were added to a container, and after replacing the air, 3 mL of diethylene glycol methyl ether and 0.14 g of pentafluorobromobenzene were added, and the mixture was heated at 140°C for 42 h. After the reaction was completed, the mixture was cooled, diluted with ethyl acetate, filtered, washed with distilled water and saturated sodium chloride in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was petroleum ether, and product B was obtained; S3: 0.21 g of product B, 0.16 g of 4-aminophenol, 0.29 g of cesium carbonate and 1.1 mL of N,N-dimethylformamide were added to a container, heated at 130°C for 14 h, cooled after the reaction, diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:1, to obtain product C; S4: 0.63 g of product C and 3 mL of N-methylpyrrolidone were added to a container, stirred for 5 h under an argon atmosphere, and then 0.27 g of isophthalic anhydride was added. After stirring at room temperature for 24 h, heat treatment was performed. The heat treatment process was: first heated at 150°C for 30 min, then heated at 200°C for 30 min, and finally heated at 250°C for 60 min to obtain a modified stabilizer.

[0035] The present embodiment discloses a polyetheretherketone polishing brush wire material, which is composed of the following components in parts by weight: 55 parts of polyetheretherketone, 9 parts of modified toughening agent, 6 parts of modified stabilizer, 4 parts of ultraviolet absorber UV-326, 10 parts of chromium trioxide, and 3 parts of graphite.

[0036] This embodiment discloses a method for preparing a polyetheretherketone polishing brush filament material, comprising the following steps: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, ultraviolet absorber UV-326, chromium trioxide and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

[0037] Example 5: This example discloses a method for preparing a modified toughening agent, comprising the following steps: Q1: Under nitrogen protection, 0.78g of allyl glycidyl ether and 0.005g of Karstedt catalyst were added to a container equipped with a dropping funnel, a condenser and a thermometer, heated and stirred at 70°C for 15min, and then 1.05g of benzyldimethylsilane was added to the dropping funnel. The dropping time was controlled to be 60min. After the dropping was completed, the temperature was raised to 80°C at a heating rate of 10°C / h and the reaction was continued for 8h. After the reaction was completed, activated carbon was added for adsorption, decolorization, and reduced pressure distillation was performed to obtain an intermediate product; Q2: Add 29.75g of the intermediate product into a container, heat and stir at 85°C, then drop 9.21g of vinyl acetic acid, 0.28g of tetrabutylammonium bromide and 0.07g of 4-methoxyphenol, control the dropping time to 60min, heat at 95°C for 6h to obtain a modified toughening agent.

[0038] This embodiment discloses a method for preparing a modified stabilizer, comprising the following steps: S1: Add 2.95 g of pentafluorobenzoic acid and 10 mL of ethanol to a container, stir and dissolve to obtain a mixed solution 1, add 1.74 g of potassium tert-butoxide to 10 mL of ethanol, stir and dissolve to obtain a mixed solution 2, slowly drop the mixed solution 2 into the mixed solution 1, control the dropping time to 30 min, stir and react at 32° C. for 180 min, rotary evaporate, add ether, filter, wash with ethanol and ether in turn, and vacuum dry at 40° C. for 12 h to obtain product A; S2: 0.31 g of product A, 0.032 g of cuprous iodide and 0.024 g of 1,10-phenanthroline were added to a container, and after replacing the air, 4 mL of diethylene glycol methyl ether and 0.19 g of pentafluorobromobenzene were added, and the mixture was heated at 140°C for 42 h. After the reaction was completed, the mixture was cooled, diluted with ethyl acetate, filtered, washed with distilled water and saturated sodium chloride in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was petroleum ether, and product B was obtained; S3: 0.29 g of product B, 0.19 g of 4-aminophenol, 0.38 g of cesium carbonate and 1.9 mL of N,N-dimethylformamide were added to a container, heated at 130°C for 14 h, cooled after the reaction, diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in turn, dried with anhydrous sodium sulfate, filtered, vacuum concentrated, and purified. The eluent in the purification process was a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:1, to obtain product C; S4: 0.82 g of product C and 4 mL of N-methylpyrrolidone were added to a container, stirred for 5 h under an argon atmosphere, and then 0.37 g of isophthalic anhydride was added. After stirring at room temperature for 24 h, heat treatment was performed. The heat treatment process was: first heated at 150°C for 30 min, then heated at 200°C for 30 min, and finally heated at 250°C for 60 min to obtain a modified stabilizer.

[0039] The present embodiment discloses a polyetheretherketone polishing brush wire material, which is composed of the following components in parts by weight: 65 parts of polyetheretherketone, 11 parts of a modified toughening agent, 9 parts of a modified stabilizer, 5 parts of an ultraviolet absorber UV-326, 7 parts of chromium trioxide, and 4 parts of graphite.

[0040] This embodiment discloses a method for preparing a polyetheretherketone polishing brush filament material, comprising the following steps: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, ultraviolet absorber UV-326, chromium trioxide and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

[0041] Comparative Example 1: Compared with Example 1, in the process of preparing the modified toughening agent in Comparative Example 1, no benzyldimethylsilane is added, and other conditions remain unchanged.

[0042] Comparative Example 2: Compared with Example 1, in the process of preparing the modified stabilizer in Comparative Example 2, pentafluorobenzoic acid is not added, and other conditions remain unchanged.

[0043] Comparative Example 3: Compared with Example 1, in Comparative Example 3, during the process of preparing the polyetheretherketone polishing brush wire material, no modified toughening agent is added, and other conditions remain unchanged.

[0044] Comparative Example 4: Compared with Example 1, in Comparative Example 4, during the process of preparing the polyetheretherketone polishing brush wire material, no modified stabilizer is added, and other conditions remain unchanged.

[0045] Experimental example: The wear resistance of the sample was tested according to GB / T 3960-2016, and the toughness of the sample was tested according to GB / T 1843-2008. The prepared sample was immersed in 1 mol / L dimethyl sulfoxide, and the mass change of the sample before and after treatment was measured, and the mass reduction rate was calculated. The test results are shown in Table 1: Table 1 It can be seen from the test results in Table 1 that the polyetheretherketone polishing brush wire materials prepared in Examples 1-5 of the present invention have excellent wear resistance, resistance to polar solvents and toughness. By comparing Comparative Example 1 with Examples 1-5, it can be seen that the addition of benzyldimethylsilane can effectively improve the toughness of the polyetheretherketone polishing brush wire materials; by comparing Comparative Example 2 with Examples 1-5, it can be seen that the addition of pentafluorobenzoic acid can effectively improve the wear resistance and polar solvent resistance of the polyetheretherketone polishing brush wire materials; by comparing Comparative Example 3 with Examples 1-5, it can be seen that the addition of a modified toughening agent can effectively improve the toughness of the polyetheretherketone polishing brush wire materials; by comparing Comparative Example 4 with Examples 1-5, it can be seen that the addition of a modified stabilizer can effectively improve the wear resistance and polar solvent resistance of the polyetheretherketone polishing brush wire materials.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0047] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A polyetheretherketone polishing brush material, characterized in that: The invention is composed of the following components in parts by weight: 50-70 parts of polyetheretherketone, 8-13 parts of modified toughening agent, 5-10 parts of modified stabilizer, 3-6 parts of light stabilizer, 6-12 parts of lubricant and 2-5 parts of graphite, wherein the modified toughening agent is prepared from allyl glycidyl ether, benzyldimethylsilane, vinylacetic acid and 4-methoxyphenol, and the modified stabilizer is prepared from pentafluorobenzoic acid, potassium tert-butoxide, 1,10-phenanthroline, pentafluorobromobenzene, 4-aminophenol and pyromellitic anhydride.

2. The polyetheretherketone polishing brush material according to claim 1, characterized in that: The preparation method of the modified toughening agent comprises the following steps: Q1: Under nitrogen protection, allyl glycidyl ether and Karstedt catalyst are added to a container equipped with a dropping funnel, a condenser and a thermometer, heated and stirred, and then benzyldimethylsilane is added to the dropping funnel, and the dropping time is controlled. After the dropping is completed, the temperature is raised to continue the reaction. After the reaction is completed, adsorption, decolorization, and reduced pressure distillation are performed to obtain an intermediate product; Q2: Add the intermediate product into a container, heat and stir, then drop vinyl acetic acid, tetrabutylammonium bromide and 4-methoxyphenol, control the dropping time, heat and react to obtain a modified toughening agent.

3. The polyetheretherketone polishing brush wire material according to claim 2, characterized in that: In the Q1, the molar ratio of allyl glycidyl ether to benzyl dimethyl silane is (1-1.2): (0.9-1.1), the heating and stirring temperature is 60-70°C, the stirring time is 10-15min, the dropwise addition time is controlled to be 60-80min, the temperature is raised to 80-90°C at a heating rate of 10°C / h, the reaction is continued for 6-8h, and activated carbon is added for adsorption.

4. The polyetheretherketone polishing brush material according to claim 2, characterized in that: In the Q2, the molar ratio of the intermediate product to vinyl acetic acid is (0.9-1.2): (0.8-1.2), the heating and stirring time is 80-85°C, the dropwise addition time is controlled to be 60-80min, the heating reaction temperature is 90-105°C, and the reaction time is 3-6h.

5. The polyetheretherketone polishing brush material according to claim 1, characterized in that: The preparation method of the modified stabilizer comprises the following steps: S1: adding pentafluorobenzoic acid and ethanol into a container, stirring and dissolving to obtain a mixed solution 1, adding potassium tert-butoxide into ethanol, stirring and dissolving to obtain a mixed solution 2, slowly dropping the mixed solution 2 into the mixed solution 1, controlling the dropping time, stirring for reaction, rotary evaporation, adding ether, filtering, washing, and vacuum drying to obtain product A; S2: Add product A, cuprous iodide and 1,10-phenanthroline into a container, replace the air, add diethylene glycol methyl ether and pentafluorobromobenzene, heat to react, cool, dilute, filter, wash, dry, filter, vacuum concentrate, purify, and obtain product B; S3: adding product B, 4-aminophenol, cesium carbonate and N,N-dimethylformamide into a container, heating for reaction, cooling, diluting, washing, drying, filtering, vacuum concentrating and purifying after the reaction is completed to obtain product C; S4: Add product C and N-methylpyrrolidone into a container, stir and dissolve under argon atmosphere, then add pyromellitic dianhydride, stir at room temperature, and perform heat treatment to obtain a modified stabilizer.

6. The polyetheretherketone polishing brush material according to claim 5, characterized in that: In the S1, the dosage ratio of pentafluorobenzoic acid and potassium tert-butoxide is (2.12-3.18) g: (1.12-1.98) g, the dropping time is 30-45 min, the stirring reaction temperature is 28-32 ° C, the time is 120-180 min, and the reaction is washed with ethanol and ether in turn. The vacuum drying temperature is 30-40 ° C, and the time is 10-12 h; in the S2, the product A, cuprous iodide, 1,10-phenanthroline, diethylene glycol methyl The dosage ratio of ether and pentafluorobromobenzene is (0.19-0.38) g: (0.019-0.035) g: (0.018-0.026) g: (2-5) mL: (0.12-0.22) g, the heating reaction temperature is 120-140°C, the reaction time is 36-42h, diluted with ethyl acetate, washed with distilled water and saturated sodium chloride in turn, and dried with anhydrous sodium sulfate. The eluent in the purification process is petroleum ether.

7. The polyetheretherketone polishing brush material according to claim 5, characterized in that: In the S3, the amount ratio of product B, 4-aminophenol, cesium carbonate and N,N-dimethylformamide is (0.17-0.33) g: (0.12-0.22) g: (0.26-0.49) g: (1-2) mL, the heating reaction temperature is 110-130°C, the time is 12-14 h, it is diluted with methyl tert-butyl ether, washed with saturated sodium bicarbonate aqueous solution and saturated sodium chloride solution in sequence, and dried with anhydrous sodium sulfate. The eluent in the purification process is a mixed solution of petroleum ether and ethyl acetate in a volume ratio of 3:

1.

8. The polyetheretherketone polishing brush wire material according to claim 5, characterized in that: In the S4, the dosage ratio of product C, N-methylpyrrolidone and pyromellitic dianhydride is (0.51-1.01) g: (2-5) mL: (0.22-0.42) g, the stirring and dissolving time is 3-5 h, the stirring time at room temperature is 20-24 h, and the heat treatment process is: first heating at 150°C for 30 min, then heating at 200°C for 30 min, and finally heating at 250°C for 60 min.

9. The method for preparing the polyetheretherketone polishing brush filament material according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: adding polyetheretherketone, modified toughening agent, modified stabilizer, light stabilizer, lubricant and graphite into a high-speed mixer to obtain a mixture; Step 2: Transfer the mixed material to a melt extruder, extrude, stretch, and shape to obtain a polyetheretherketone polishing brush wire material.

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