Impact-resistant PEEK composite material and preparation method thereof
By adding modified halloysite nanotubes and boron nitride fillers to PEEK materials, the problem of insufficient impact resistance of PEEK materials under low temperature or high-speed impact conditions was solved, the toughness and thermal stability of the materials were improved, and their application range was expanded.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 安徽赛诺新材料科技有限公司
- Filing Date
- 2026-01-22
- Publication Date
- 2026-04-24
AI Technical Summary
Existing PEEK materials have insufficient impact resistance under low temperature or high-speed impact conditions, and poor compatibility with inorganic fibers, resulting in severe toughness loss, which limits their application in parts that need to withstand severe dynamic loads or impact wear.
Modified halloysite nanotubes and boron nitride of different particle sizes were used as fillers to be combined with PEEK materials. PEEK composite materials were prepared by mechanical mixing and extrusion molding processes to improve dispersibility and compatibility, and to enhance the toughness and impact resistance of the materials.
It significantly improves the wear resistance, tensile strength and impact strength of PEEK composite materials, while maintaining the thermal stability of the material, thus broadening the application fields.
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Abstract
Description
Technical Field
[0001] This invention belongs to the field of polymer materials technology, specifically relating to an impact-resistant PEEK composite material and its preparation method. Background Technology
[0002] Polyetheretherketone (PEEK) is one of the most representative polyaryletherketone polymers and is a thermoplastic resin with the best overall performance. It possesses outstanding mechanical properties and exhibits excellent performance in high-temperature resistance, corrosion resistance, flame retardancy, radiation resistance, and electrical insulation. With the continuous development of science and technology and the ever-expanding demand for high-performance materials, the global production of PEEK materials has rapidly increased, leading to its widespread application in the automotive, machining, aerospace, biomedical, and electronics industries.
[0003] However, despite PEEK's outstanding overall performance, its impact resistance in certain specific applications, especially under low-temperature or high-speed impact conditions, remains insufficient. Pure PEEK resin itself exhibits a degree of brittleness, and its notched impact strength is lower compared to other high-toughness engineering plastics. This significantly limits its further application in components that need to withstand severe dynamic loads or impact wear. To further improve the overall performance of PEEK, in practical applications, PEEK materials are mostly blended with other inorganic particles or fibers to prepare composite materials. Common preparation processes for PEEK composite materials include melt blending, solution blending, and in-situ polymerization.
[0004] In practical applications, to further improve the strength and wear resistance of specialty engineering plastics, they are usually modified. Carbon materials are the most commonly used. For example, the tensile strength of pure PEEK injection-molded samples is 95–105 MPa, while adding 30 wt% short-cut carbon fiber reinforcement can increase the tensile strength to over 200 MPa, while also improving wear resistance. However, the increase in strength inevitably leads to a decrease in plasticity, with the elongation at break dropping below 2%. Furthermore, due to the inherent inertness of PEEK, its compatibility with inorganic fibers is poor, resulting in limited strength gains and significant toughness loss, severely impacting the toughness of PEEK materials and their use in many applications.
[0005] Therefore, developing a new type of PEEK composite material that can achieve a substantial breakthrough in impact resistance while maintaining the inherent high performance of PEEK resin, especially taking into account the impact toughness at high and low temperatures, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention
[0006] The purpose of this invention is to provide an impact-resistant PEEK composite material and its preparation method, so as to solve the problem of poor mechanical properties of pure PEEK materials in the prior art.
[0007] The objective of this invention can be achieved through the following technical solutions: The first aspect of this invention provides an impact-resistant PEEK composite material, comprising, by weight, the following raw materials: 50-78 servings of PEEK; 8-15 parts of modified halloysite nanotubes; 1-3 parts of boron nitride; 3-5 parts lubricant; Antioxidant 0.1 to 1 part; The modified halloysite nanotubes were prepared by the following steps: Carboxylated halloysite nanotubes were added to N,N-dimethylformamide and sonicated for 0.5–1 h to obtain a suspension. Modified polyethersulfone, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine were added to N,N-dimethylformamide and stirred for 10–15 min to obtain a mixture. The above suspension and mixture were then mixed and stirred under a nitrogen atmosphere for 24–26 h. The mixture was filtered, washed 3–5 times with distilled water, and finally dried in a vacuum oven at 80 °C for 24 h to obtain modified halloysite nanotubes.
[0008] As a further embodiment of the present invention, the ratio of carboxylated halloysite nanotubes to N,N-dimethylformamide is 0.5–0.6 g: 100 mL; the ratio of modified polyethersulfone, N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and N,N-dimethylformamide is 5.5–5.8 g: 20–21 g: 1.50–1.54 g: 200 mL.
[0009] As a further embodiment of the present invention, the modified polyethersulfone is prepared by the following steps: Polyethersulfone was slowly added to a mixed acid solution, and the mixture was heated to 55–60°C and stirred for 6.0–6.5 h. After cooling, the mixture was filtered, and the solid was washed with distilled water 3–5 times. Then, it was dried in a vacuum oven at 80°C for 12 h to obtain nitrated polyethersulfone. Tin chloride and hydrochloric acid were added to ethanol, and then nitrated polyethersulfone was added. The mixture was heated to 55–60°C and stirred for 4.0–4.5 h. After cooling to room temperature, the mixture was filtered, and the solid was washed with distilled water 2–3 times. Finally, it was dried in a vacuum oven at 100°C for 24 h to obtain modified polyethersulfone.
[0010] As a further embodiment of the present invention, the ratio of polyethersulfone to mixed acid solution is 10g:70mL; wherein the mixed acid solution is prepared by mixing nitric acid and sulfuric acid in a volume ratio of 3:4; and the ratio of tin chloride, hydrochloric acid, ethanol and nitrated polyethersulfone is 18-20g:18-20g:50mL:2.9-3.0g.
[0011] As a further aspect of the present invention, the boron nitride has a particle size of 0.05–1 μm, 10–15 μm, or 30–45 μm.
[0012] As a further aspect of the present invention, the ratio of boron nitride with a particle size of 0.05 to 1 μm, boron nitride with a particle size of 10 to 15 μm, and boron nitride with a particle size of 30 to 45 μm is 2:2:6.
[0013] In the above technical solution, by using boron nitride with different particle sizes and rationally controlling the ratio of the three particle sizes, boron nitride is added as a second filler to PEEK material. The addition of boron nitride can effectively reduce the friction coefficient of PEEK material, while effectively improving the rigidity and toughness of PEEK composite material. Different particle sizes of boron nitride have different effects on PEEK material. Small boron nitride particles, due to their large specific surface area and better dispersibility, are more likely to form a uniformly distributed thermally conductive and lubricating network in the PEEK matrix, thereby rapidly migrating to the contact interface during friction to form a continuous and stable transfer film, significantly reducing the friction coefficient. At the same time, its layered structure is prone to interlayer slip under shearing action, effectively reducing abrasive wear and exhibiting superior friction-reducing performance. The larger boron nitride particles act as "rivets," causing the surface to become uneven upon impact, thus increasing the impact strength of the PEEK composite material. In other words, when PEEK material is subjected to a sudden external force, the impact energy is dissipated by the boron nitride particles, thereby enhancing the impact resistance of the PEEK material. Furthermore, the addition of boron nitride does not compromise the thermal stability of PEEK; the PEEK composite material still exhibits excellent heat resistance.
[0014] As a further embodiment of the present invention, the lubricant is at least one of polyethylene wax and silicone powder.
[0015] As a further aspect of the present invention, the antioxidant is at least one of antioxidant 3114, antioxidant 1330, and antioxidant 9228.
[0016] A second aspect of this invention provides a method for preparing an impact-resistant PEEK composite material, comprising the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation to obtain PEEK composite material.
[0017] As a further aspect of the present invention, in step 2, the temperature of each heating zone in the twin-screw extruder is controlled at 340–380°C, and the rotation speed is controlled at 100–110 r / min.
[0018] The beneficial effects of this invention are: This invention uses PEEK as the matrix, modified halloysite nanotubes and boron nitride as filler phases, and adds lubricants and antioxidants. Through mechanical mixing and extrusion molding processes, PEEK composite materials with excellent mechanical strength, heat resistance and friction properties are prepared.
[0019] The modified halloysite nanotubes provided by this invention utilize high-performance polymer polyethersulfone (PESsulfone) to graft and modify carbon nanotubes, thereby improving the dispersibility of carbon nanotubes in PEEK and enhancing their interfacial bonding performance with the matrix. PESsulfone possesses high thermal stability, excellent high-temperature mechanical properties, good toughness and impact resistance, and, at low concentrations, is completely miscible with PEEK resins of similar molecular structures in a small molecule form. Therefore, this invention first nitrates the PESsulfone, then reduces it to obtain aminated PESsulfone. Finally, carboxylated halloysite nanotubes undergo a condensation reaction with the aminated PESsulfone to generate peptide bonds, thus grafting a certain thickness of PESsulfone onto the surface of the halloysite nanotubes. This effectively improves the dispersion and compatibility of halloysite nanotubes in the PEEK matrix. The uniformly dispersed halloysite nanotubes are tightly bonded to the PEEK matrix, increasing the effective contact area between atoms and strengthening the overall interaction, thereby effectively enhancing the mechanical properties of the PEEK material.
[0020] This invention provides a method for preparing impact-resistant PEEK composite materials. The process is simple, the raw materials are readily available, and the production efficiency is high. It can effectively improve the mechanical properties, toughness, impact resistance, and thermal stability of PEEK materials, thus broadening the application fields. At the same time, the products obtained have stable performance and can be mass-produced. Detailed Implementation
[0021] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structure may be omitted. This is to avoid making the following description unnecessarily lengthy and to facilitate understanding by those skilled in the art. Furthermore, the following description is provided to enable those skilled in the art to fully understand this application and is not intended to limit the subject matter of the claims.
[0023] Preparation Example
[0024] Preparation Example 1
[0025] This preparation example provides a modified halloysite nanotube, and the preparation steps are as follows: S1. Slowly add 10g of polyethersulfone to 70mL of mixed acid solution (where the volume ratio of nitric acid to sulfuric acid is 3:4), heat to 60℃ and stir for 6.0h, cool and filter, wash the filtered solid three times with distilled water, and then dry in a vacuum oven at 80℃ for 12h to obtain nitrated polyethersulfone; add 18g of tin chloride and 18g of hydrochloric acid to 50mL of ethanol, then add 2.9g of nitrated polyethersulfone, heat to 60℃ and stir for 4.0h, cool to room temperature, filter, wash the filtered solid twice with distilled water, and finally dry in a vacuum oven at 100℃ for 24h to obtain modified polyethersulfone; S2. Add 0.5g of carboxylated halloysite nanotubes to 100mL of N,N-dimethylformamide and sonicate for 0.5h to obtain a suspension. Add 5.5g of modified polyethersulfone, 20g of N,N'-dicyclohexylcarbodiimide and 1.50g of 4-dimethylaminopyridine to 200mL of N,N-dimethylformamide and stir for 10min to obtain a mixture. Then mix the above suspension with the mixture and stir under nitrogen atmosphere for 24h. Filter, wash three times with distilled water, and finally dry in an 80℃ vacuum oven for 24h to obtain modified halloysite nanotubes.
[0026] Preparation Example 2
[0027] Compared with Preparation Example 1, the only difference is in step S1: S1. Slowly add 10g of polyethersulfone to 70mL of mixed acid solution (where the volume ratio of nitric acid to sulfuric acid is 3:4), heat to 60℃ and stir for 6.0h, cool and filter, wash the filtered solid three times with distilled water, and then dry in a vacuum oven at 80℃ for 12h to obtain nitrated polyethersulfone; add 20g of tin chloride and 120g of hydrochloric acid to 50mL of ethanol, then add 3.0g of nitrated polyethersulfone, heat to 60℃ and stir for 4.5h, cool to room temperature, filter, wash the filtered solid twice with distilled water, and finally dry in a vacuum oven at 100℃ for 24h to obtain modified polyethersulfone; S2. Add 0.5g of carboxylated halloysite nanotubes to 100mL of N,N-dimethylformamide and sonicate for 0.5h to obtain a suspension. Add 5.5g of modified polyethersulfone, 20g of N,N'-dicyclohexylcarbodiimide and 1.50g of 4-dimethylaminopyridine to 200mL of N,N-dimethylformamide and stir for 10min to obtain a mixture. Then mix the above suspension with the mixture and stir under nitrogen atmosphere for 24h. Filter, wash three times with distilled water, and finally dry in an 80℃ vacuum oven for 24h to obtain modified halloysite nanotubes.
[0028] Preparation Example 3
[0029] Compared to Preparation Example 1, the only difference lies in step S2: S1. Slowly add 10g of polyethersulfone to 70mL of mixed acid solution (where the volume ratio of nitric acid to sulfuric acid is 3:4), heat to 60℃ and stir for 6.0h, cool and filter, wash the filtered solid three times with distilled water, and then dry in a vacuum oven at 80℃ for 12h to obtain nitrated polyethersulfone; add 20g of tin chloride and 120g of hydrochloric acid to 50mL of ethanol, then add 3.0g of nitrated polyethersulfone, heat to 60℃ and stir for 4.5h, cool to room temperature, filter, wash the filtered solid twice with distilled water, and finally dry in a vacuum oven at 100℃ for 24h to obtain modified polyethersulfone; S2. 0.6 g of carboxylated halloysite nanotubes were added to 100 mL of N,N-dimethylformamide and sonicated for 0.5 h to obtain a suspension. 5.8 g of modified polyethersulfone, 21 g of N,N'-dicyclohexylcarbodiimide and 1.54 g of 4-dimethylaminopyridine were added to 200 mL of N,N-dimethylformamide and stirred for 15 min to obtain a mixture. The above suspension and mixture were then mixed and stirred under a nitrogen atmosphere for 24 h. The mixture was filtered, washed three times with distilled water, and finally dried in an 80 °C vacuum oven for 24 h to obtain modified halloysite nanotubes.
[0030] Example
[0031] Example 1
[0032] This embodiment provides an impact-resistant PEEK composite material and its preparation method: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 50 parts of PEEK, 8 parts of modified halloysite nanotubes from Preparation Example 1, 1 part of boron nitride, 3 parts of polyethylene wax, and 0.1 parts of antioxidant 3114; The boron nitride particles include 0.05–1 μm, 10–15 μm, and 30–45 μm, and the ratio of boron nitride particles with a particle size of 0.05–1 μm, 10–15 μm, and 30–45 μm is 2:2:6.
[0033] A method for preparing an impact-resistant PEEK composite material includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation. The temperature of each heating zone in the twin-screw extruder is controlled at 340℃ and the rotation speed is controlled at 100 r / min to obtain PEEK composite material.
[0034] Example 2
[0035] The only difference compared to Example 1 is: The modified halloysite nanotubes in Preparation Example 1 were replaced with the modified halloysite nanotubes in Preparation Example 2, with the same amount of each nanotube.
[0036] Example 3
[0037] The only difference compared to Example 1 is: The modified halloysite nanotubes in Preparation Example 1 were replaced with the modified halloysite nanotubes in Preparation Example 3, with the same amount of each nanotube.
[0038] Example 4
[0039] The only difference compared to Example 1 is: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 64 parts of PEEK, 11 parts of modified halloysite nanotubes from Preparation Example 1, 2 parts of boron nitride, 4 parts of polyethylene wax, and 0.5 parts of antioxidant 3114.
[0040] Example 5
[0041] The only difference compared to Example 1 is: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 78 parts of PEEK, 15 parts of modified halloysite nanotubes from Preparation Example 1, 3 parts of boron nitride, 5 parts of polyethylene wax, and 1 part of antioxidant 3114.
[0042] Example 6
[0043] The only difference compared to Example 1 is: A method for preparing an impact-resistant PEEK composite material includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation. The temperature of each heating zone in the twin-screw extruder is controlled at 380℃ and the rotation speed is controlled at 110 r / min to obtain PEEK composite material.
[0044] Comparative Example
[0045] Comparative Example 1
[0046] This comparative example provides an impact-resistant PEEK composite material and its preparation method: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 50 parts PEEK, 3 parts polyethylene wax, 0.1 parts antioxidant 3114.
[0047] A method for preparing an impact-resistant PEEK composite material includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation. The temperature of each heating zone in the twin-screw extruder is controlled at 340℃ and the rotation speed is controlled at 100 r / min to obtain PEEK composite material.
[0048] Comparative Example 2
[0049] This comparative example provides an impact-resistant PEEK composite material and its preparation method: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 50 parts PEEK, 8 parts halloysite nanotubes, 3 parts polyethylene wax, and 0.1 parts antioxidant 3114.
[0050] A method for preparing an impact-resistant PEEK composite material includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation. The temperature of each heating zone in the twin-screw extruder is controlled at 340℃ and the rotation speed is controlled at 100 r / min to obtain PEEK composite material.
[0051] Comparative Example 3
[0052] This comparative example provides an impact-resistant PEEK composite material and its preparation method: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 50 parts PEEK, 1 part boron nitride, 3 parts polyethylene wax, 0.1 parts antioxidant 3114.
[0053] A method for preparing an impact-resistant PEEK composite material includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation. The temperature of each heating zone in the twin-screw extruder is controlled at 340℃ and the rotation speed is controlled at 100 r / min to obtain PEEK composite material.
[0054] Comparative Example 4
[0055] The only difference compared to Example 1 is: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 50 parts of PEEK, 8 parts of modified halloysite nanotubes from Preparation Example 1, 1 part of boron nitride, 3 parts of polyethylene wax, and 0.1 parts of antioxidant 3114.
[0056] Comparative Example 5
[0057] The only difference compared to Example 1 is: The boron nitride particles include 10–15 μm and 30–45 μm, and the ratio of boron nitride particles with a particle size of 0.05–1 μm, particles with a particle size of 10–15 μm, and particles with a particle size of 30–45 μm is 2:6.
[0058] Comparative Example 6
[0059] The only difference compared to Example 1 is: The boron nitride has a particle size of 0.05–1 μm and 10–15 μm, and the ratio of boron nitride with a particle size of 0.05–1 μm, boron nitride with a particle size of 10–15 μm, and boron nitride with a particle size of 30–45 μm is 2:2.
[0060] Comparative Example 7
[0061] The only difference compared to Example 1 is: The particle size of boron nitride is 0.05–1 μm.
[0062] Comparative Example 8
[0063] The only difference compared to Example 1 is: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 40 parts PEEK, 8 parts modified halloysite nanotubes from Preparation Example 1, 1 part boron nitride, 3 parts polyethylene wax, and 0.1 parts antioxidant 3114. Comparative Example 9 The only difference compared to Example 1 is: An impact-resistant PEEK composite material, comprising the following raw materials in parts by weight: 85 parts PEEK, 5 parts modified halloysite nanotubes from Preparation Example 1, 0.6 parts boron nitride, 3 parts polyethylene wax, and 0.1 parts antioxidant 3114. Comparative Example 10 The only difference compared to Example 1 is: A method for preparing an impact-resistant PEEK composite material includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation. The temperature of each heating zone in the twin-screw extruder is controlled at 320℃ and the rotation speed is controlled at 100 r / min to obtain PEEK composite material.
[0064] Performance testing
[0065] The following performance tests were performed on the PEEK composite materials prepared in Examples 1 to 6 and Comparative Examples 1 to 10: (1) Wear rate: The wear rate of the PEEK composite materials was determined according to ASTM D3702 standard. (2) Tensile strength: The tensile strength of the PEEK composite materials was determined according to GB / T 1040 standard. (3) Impact strength: The impact strength of the PEEK composite materials was determined according to GB / T 1043 standard. The test results are shown in Table 1. Table 1
[0066] As shown in Table 1, compared with Comparative Examples 1-10, the PEEK composite materials prepared in Examples 1-6 exhibit superior wear resistance, tensile strength, and impact strength. Therefore, the method for preparing impact-resistant PEEK composite materials provided by this invention can effectively improve the mechanical properties, toughness, impact resistance, and thermal stability of PEEK materials, thus broadening their application fields. Furthermore, the process is simple, the raw materials are readily available, the production efficiency is high, and the resulting products have stable performance, allowing for large-scale production.
[0067] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0068] It should be understood that in the various embodiments of this application, the sequence number of each process does not imply the order of execution. Some or all steps may be executed in parallel or sequentially. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the implementation regulations of this application.
[0069] Unless otherwise specified, all raw materials, reagents, instruments and equipment used in this application are available on the market or can be prepared by existing methods.
[0070] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions, and all technical features and optional technical features of this application can be combined to form new technical solutions.
[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An impact-resistant PEEK composite material, characterized in that, By weight, it includes the following ingredients: 50-78 servings of PEEK; 8-15 parts of modified halloysite nanotubes; 1-3 parts of boron nitride; 3-5 parts lubricant; Antioxidant 0.1 to 1 part; The modified halloysite nanotubes were prepared by the following steps: Carboxylated halloysite nanotubes were added to N,N-dimethylformamide and sonicated for 0.5–1 h to obtain a suspension. Modified polyethersulfone, N,N'-dicyclohexylcarbodiimide, and 4-dimethylaminopyridine were added to N,N-dimethylformamide and stirred for 10–15 min to obtain a mixture. The above suspension and mixture were then mixed and stirred under a nitrogen atmosphere for 24–26 h. The mixture was then filtered, washed, and vacuum dried to obtain modified halloysite nanotubes.
2. The impact-resistant PEEK composite material according to claim 1, characterized in that, The ratio of carboxylated halloysite nanotubes to N,N-dimethylformamide is 0.5–0.6 g: 100 mL; the ratio of modified polyethersulfone, N,N'-dicyclohexylcarbodiimide, 4-dimethylaminopyridine, and N,N-dimethylformamide is 5.5–5.8 g: 20–21 g: 1.50–1.54 g: 200 mL.
3. The impact-resistant PEEK composite material according to claim 1, characterized in that, The modified polyethersulfone is prepared by the following steps: Polyethersulfone was slowly added to a mixed acid solution, and the mixture was heated to 55–60 °C and stirred for 6.0–6.5 h. After cooling, the mixture was filtered, washed, and dried under vacuum to obtain nitrated polyethersulfone. Tin chloride and hydrochloric acid were added to ethanol, followed by the addition of nitrated polyethersulfone. The mixture was heated to 55–60 °C and stirred for 4.0–4.5 h. After cooling to room temperature, the mixture was filtered, washed, and dried under vacuum to obtain modified polyethersulfone.
4. The impact-resistant PEEK composite material according to claim 3, characterized in that, The ratio of polyethersulfone to mixed acid solution is 10g:70mL; the mixed acid solution is made by mixing nitric acid and sulfuric acid in a volume ratio of 3:4; the ratio of tin chloride, hydrochloric acid, ethanol and nitrated polyethersulfone is 18-20g:18-20g:50mL:2.9-3.0g.
5. The impact-resistant PEEK composite material according to claim 1, characterized in that, The boron nitride has a particle size of 0.05–1 μm, 10–15 μm, or 30–45 μm.
6. The impact-resistant PEEK composite material according to claim 5, characterized in that, The ratio of boron nitride with a particle size of 0.05–1 μm, boron nitride with a particle size of 10–15 μm, and boron nitride with a particle size of 30–45 μm is 2:2:
6.
7. The impact-resistant PEEK composite material according to claim 1, characterized in that, The lubricant is at least one of polyethylene wax and silicone powder.
8. The impact-resistant PEEK composite material according to claim 1, characterized in that, The antioxidant is at least one of antioxidant 3114, antioxidant 1330, and antioxidant 9228.
9. The method for preparing an impact-resistant PEEK composite material according to claim 1, characterized in that, Includes the following steps: Step 1: Weigh out the dried raw materials according to their weight proportions and add them to a mixer to mix until homogeneous, thus obtaining a mixture. Step 2: The mixture is fed into a twin-screw extruder for extrusion granulation to obtain PEEK composite material.
10. The method for preparing an impact-resistant PEEK composite material according to claim 9, characterized in that, In step 2, the temperature of each heating zone in the twin-screw extruder is controlled at 340–380℃, and the rotation speed is controlled at 100–110 r / min.