Polymerization preparation process for high polymer material

Abstract

The invention provides a polymerization preparation process for a high polymer material. The polymerization preparation process comprises the following steps: step 1, compounding CNT / PEEK; step 2, compression molding; step 3, solution blending: a, acidizing treatment; b, surface modification; c, preparing a composite material; d, film casting; e, drying after cooling; f, after cooling, immersing into deionized water; g, drying treatment; step 4, hot pressed sintering; step 5, performance detection; according to the invention, three high polymer materials such as CNT, PEEK and carbon fibers are innovatively polymerized into the bushing material with high bearing and self-lubricating properties, and process scheme researches and experimental researches such as a compression molding method, a solution blending method and a hot pressing sintering method are carried out aiming at equipment application scenes and hinge configurations; the prepared high polymer material can improve the performance of the high-bearing self-lubricating bushing in an extremely severe environment and improve the use maintainability, the high-performance self-lubricating bushing for design required by the model is obtained, and the application requirement of a high-bearing hinge of a novel control surface control mechanism of an airplane is met.

Description

Technical Field

[0001] The invention relates to a preparation process, in particular to a preparation process for polymer material polymerization, belonging to the technical field of polymer materials. Background Art

[0002] Self-lubricating bushings have the advantages of high load-bearing capacity, long service life, high reliability, good environmental adaptability, simple and compact structure, light weight, and maintenance-free. They have attracted extensive attention and become the core components of many equipment, especially in the equipment of national key industries such as aerospace and engineering machinery. They play a key role. Self-lubricating bushings are composed of an outer ring and a self-lubricating material bonded to the inner surface of the outer ring. Self-lubricating bushings often face severe working conditions such as heavy loads, high frequencies, and high and low temperature cycles during service. The main failure form is the wear failure of the bushing self-lubricating material. Once the self-lubricating material fails during service, it will directly lead to damage to the self-lubricating bushing, causing irreversible losses.

[0003] In order to improve the performance of high-load self-lubricating bushings in extremely harsh environments and improve the maintainability, obtain high-performance self-lubricating bushings required by the model, and meet the application requirements of high-load hinges of new aircraft control mechanisms, new polymer material polymerization technology is needed to prepare bushing materials with high load and self-lubricating properties;

[0004] In order to solve the above technical problems, a process for preparing polymer materials by polymerization is proposed. Summary of the invention

[0005] In view of this, the present invention provides a process for polymer preparation of polymer materials to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial option.

[0006] The technical solution of the present invention is achieved as follows: A process for polymerizing and preparing polymer materials, comprising the following steps:

[0007] Step 1: CNT / PEEK composite;

[0008] Step 2: Molding:

[0009] a. Load the dry resin into the mold;

[0010] b. Keep the temperature and apply pressure after heating;

[0011] c. Material cooling;

[0012] Step 3: Solution blending:

[0013] a. Acidification treatment;

[0014] b. Surface modification;

[0015] c. Preparation of composite materials;

[0016] d. Cast film;

[0017] e. Drying after cooling;

[0018] f. After cooling, immerse in deionized water;

[0019] g. Drying treatment;

[0020] Step 4: Hot pressing and sintering:

[0021] a. Pre-press into blocks;

[0022] b. Continuous cooling and pressure relief;

[0023] c. Take out the mold for demoulding;

[0024] Step 5: Performance testing:

[0025] a. Friction and wear test;

[0026] b. Resistance and wear correlation test;

[0027] c. Reveal the friction and wear mechanism of materials.

[0028] Further preferably, in the step one, 2 g of PEEK powder is dispersed in 20 ml of ethanol / distilled water solution, ultrasonically treated for 10 min and then magnetically stirred for 30 min, CNT is added to the 20 ml aqueous solution and ultrasonically treated, and then the mixed solution is magnetically stirred at 90°C until dry to obtain a PEEK / CNT blended powder, and the PEEK / CNT blended powder is dried at 100°C and then compression molded to obtain a PEEK / CNT composite material.

[0029] Further preferably, in the step 2, after the dry resin is loaded into the mold, it is kept at 350° C.-400° C. for 12 min-20 min, and a pressure of 2.5 MPa-10 MPa is applied during the keeping process, and maintained at this pressure for 30 min-40 min.

[0030] Further preferably, in the step 2, when cooling the material, the cooling is performed at a rate of 10°C / min-100°C / min.

[0031] Further preferably, in the step three, during the acid treatment, the CNTs are acid treated with H2SO4 / HNO3, and the CNTs after the acid treatment are further surface modified with different surfactants.

[0032] Further preferably, in the step three, N,N-dimethylformamide (DMF) is used as a solvent and a solution blending method is adopted to prepare the CNT / PEEK composite material.

[0033] Further preferably, in the step three, the DMF solution containing CNTs and PEEK is mechanically stirred for 50 min-70 min, cast into a film on a clean glass plate, naturally cooled at room temperature for 20 h-24 h, and then placed in a drying oven and dried at 60 ° C and 120 ° C for 20 h-24 h respectively. After drying, the material is taken out and naturally cooled at room temperature, then immersed in deionized water, peeled off, and dried in a vacuum drying oven at 60 ° C-65 ° C to constant weight to obtain a CNT / PEEK composite film.

[0034] Further preferably, in the step four, the CNT+PEEK+carbon fiber powder is pre-pressed into blocks at a pressure of 3MPa-4MPa on the inner side of the mold, and the vacuum degree of the environment is ensured to be 100Pa-101Pa. This process adopts a two-stage heating method for heating.

[0035] Further preferably, in step 4, after prefabrication, the block is continuously cooled and depressurized to 200°C and 3MPa at a rate of 16.7°C / min and 1.1MPa / min, and finally the mold is taken out and demolded when the temperature drops to below 150°C during furnace cooling.

[0036] Further preferably, in the step five, the average friction coefficient and wear rate of PEEK and its composite materials under different load conditions, as well as the average friction coefficient and wear rate of CNT / PEEK composite materials at different speeds are tested, and an aviation self-lubricating bushing service life evaluation test machine is used to carry out intelligent self-lubricating bushing friction and wear tests under laboratory conditions. The relationship between the resistance change and the wear state is determined by detecting and analyzing the resistance and wear data of the self-lubricating polymer material, and the micromorphology and composition of the worn surface of the self-lubricating polymer material are analyzed using characterization and analysis equipment such as a scanning electron microscope, an EDS spectrometer, and an X-ray photoelectron spectrometer to reveal the friction and wear mechanism of the intelligent self-lubricating polymer material.

[0037] The embodiment of the present invention has the following advantages due to the adoption of the above technical solution:

[0038] 1. The present invention innovatively uses three polymer materials such as CNT+PEEK+carbon fiber to polymerize a shaft lining material with high load-bearing and self-lubricating properties, and conducts research and experimental research on process solutions such as compression molding, solution blending and hot pressing sintering according to equipment application scenarios and hinge configurations. The prepared polymer material can improve the performance of high-load self-lubricating bushings in extremely harsh environments and improve the maintainability of use, obtain the high-performance self-lubricating bushings required by the model, and meet the application requirements of high-load hinges of new aircraft rudder control mechanisms;

[0039] 2. The present invention determines the relationship between resistance change and wear state by detecting and analyzing the resistance and wear data of self-lubricating polymer materials, so that the prepared material can be applied to real-time monitoring and life warning systems, providing intelligent health monitoring and predictive maintenance services for equipment.

[0040] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present invention will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 This is a process flow chart of polymer material preparation by polymerization of the present invention;

[0043] Figure 2 This is a CNT / PEEK compression molding composite process diagram in the present invention;

[0044] Figure 3 It is a line graph showing the effect of the amount of CNT added on the resistivity of the composite material in the present invention;

[0045] Figure 4 The thermogravimetric curves of PEEK and composite materials with different surface modifications in the present invention;

[0046] Figure 5 The graph of the storage modulus of PEEK and composite materials with different surface modifications in the present invention versus temperature;

[0047] Figure 6 It is a graph showing the glass transition temperature change of PEEK and composite materials with different surface modifications in the present invention;

[0048] Figure 7 It is a curve diagram of the friction coefficient of PEEK and composite materials with different surface modifications in the present invention changing with time;

[0049] Figure 8 It is a line graph and a bar graph of the average friction coefficient and wear rate of PEEK and its composite materials under different load conditions in the present invention;

[0050] Fig. 9 It is a line graph and a bar graph of the average friction coefficient and wear rate of the CNT / PEEK composite material at different rotation speeds in the present invention. DETAILED DESCRIPTION

[0051] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0052] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0053] Embodiment 1

[0054] like Figure 1 A polymer preparation process for polymer materials shown includes the following steps:

[0055] Step 1: CNT / PEEK composite:

[0056] like Figure 2 and Figure 3 As shown, 2 g of PEEK powder was dispersed in 20 ml of ethanol / distilled water solution, ultrasonically treated for 10 min and then magnetically stirred for 30 min, CNT was added to the 20 ml of water solution and ultrasonically treated, and then the mixed solution was magnetically stirred at 90 ° C until dry to obtain PEEK / CNT blended powder, and the PEEK / CNT blended powder was dried at 100 ° C and then compression molded to obtain PEEK / CNT composite materials. Figure 3 The effect of CNT addition on the resistivity of the composite material;

[0057] Step 2: Molding:

[0058] a. Load the dry resin into the mold;

[0059] b. After heating, keep the temperature and apply pressure. After the dry resin is loaded into the mold, keep the temperature at 350°C for 12 minutes, and apply a pressure of 2.5MPa during the heat preservation process, and keep it at this pressure for 30 minutes;

[0060] c. Material cooling: When cooling the material, cool it at a rate of 10℃ / min;

[0061] Step 3: Solution blending:

[0062] a. Acidification treatment: acidification of CNTs with H2SO4;

[0063] b. Surface modification, using anionic surfactant to further modify the surface of CNTs after acidification;

[0064] c. preparing a composite material, using N,N-dimethylformamide (DMF) as a solvent, and preparing a CNT / PEEK composite material by a solution blending method;

[0065] d. Casting film: The DMF solution containing CNTs and PEEK was mechanically stirred for 50 min and cast into a film on a clean glass plate;

[0066] e. Drying after cooling, naturally cooling at room temperature for 20 hours, and then drying in a drying oven at 60℃ and 120℃ for 20 hours respectively;

[0067] f. After cooling, immerse in deionized water, remove the material and cool it naturally at room temperature, then immerse it in deionized water and peel it off;

[0068] g. Drying treatment: Dry in a vacuum oven at 60°C until constant weight is obtained to obtain CNT / PEEK composite film. Thermogravimetric curves of PEEK and composite materials with different surface modifications are shown in the figure below. Figure 4 As shown in Figure 2, the storage modulus of PEEK and composite materials with different surface modifications varies with temperature. Figure 5 As shown in Figure 2, the glass transition temperature curves of PEEK and composite materials with different surface modifications are shown in Figure 2. Figure 6 As shown in Figure 2, the friction coefficient of PEEK and composite materials with different surface modifications varies with time. Figure 7 As shown;

[0069] Step 4: Hot pressing and sintering:

[0070] a. Pre-press into blocks. Pre-press CNT+PEEK+carbon fiber powder into blocks at a pressure of 3MPa inside the mold. The vacuum degree of the environment is guaranteed to be 100Pa. This process adopts a two-stage heating method for heating;

[0071] b. Continuously reduce the temperature and pressure to 200℃ and 3MPa at a rate of 16.7℃ / min and 1.1MPa / min;

[0072] c. Take out the mold for demoulding. When the furnace cooling temperature drops below 150°C, take out the mold for demoulding. The average friction coefficient and wear rate of PEEK and its composite materials under different load conditions are as follows: Figure 8 As shown in Figure 2, the average friction coefficient and wear rate of CNT / PEEK composite materials at different speeds are shown in Figure 2. Fig. 9 As shown;

[0073] Step 5: Performance testing:

[0074] a. Friction and wear test;

[0075] b. Resistance and wear correlation test;

[0076] c. Reveal the friction and wear mechanism of materials.

[0077] In one embodiment, the average friction coefficient and wear rate of PEEK and its composite materials under different load conditions, as well as the average friction coefficient and wear rate of CNT / PEEK composite materials under different rotational speeds are tested, and an aviation self-lubricating bushing service life evaluation test machine is used to carry out intelligent self-lubricating bushing friction and wear tests under laboratory conditions. The relationship between the resistance change and the wear state is determined by detecting and analyzing the resistance and wear data of the self-lubricating polymer material, and the microscopic morphology and composition of the worn surface of the self-lubricating polymer material are analyzed using characterization and analysis equipment such as a scanning electron microscope, an EDS spectrometer, and an X-ray photoelectron spectrometer to reveal the friction and wear mechanism of the intelligent self-lubricating polymer material.

[0078] Embodiment 2

[0079] like Figure 1 A polymer preparation process for polymer materials shown includes the following steps:

[0080] Step 1: CNT / PEEK composite:

[0081] like Figure 2 and Figure 3 As shown, 2 g of PEEK powder was dispersed in 20 ml of ethanol / distilled water solution, ultrasonically treated for 10 min and then magnetically stirred for 30 min, CNT was added to the 20 ml of water solution and ultrasonically treated, and then the mixed solution was magnetically stirred at 90 ° C until dry to obtain PEEK / CNT blended powder, and the PEEK / CNT blended powder was dried at 100 ° C and then compression molded to obtain PEEK / CNT composite materials. Figure 3 The effect of CNT addition on the resistivity of the composite material;

[0082] Step 2: Molding:

[0083] a. Load the dry resin into the mold;

[0084] b. After heating, keep the temperature and apply pressure. After the dry resin is loaded into the mold, keep the temperature at 360°C for 15 minutes, and apply 5MPa pressure during the heat preservation process, and keep it at this pressure for 40 minutes;

[0085] c. Material cooling: When cooling the material, cool it at a rate of 20℃ / min;

[0086] Step 3: Solution blending:

[0087] a. Acidification treatment: acidification of CNTs with H2SO4;

[0088] b. Surface modification, using a cationic surfactant to further modify the surface of the acidified CNTs;

[0089] c. preparing a composite material, using N,N-dimethylformamide (DMF) as a solvent, and preparing a CNT / PEEK composite material by a solution blending method;

[0090] d. Casting film: The DMF solution containing CNTs and PEEK was mechanically stirred for 60 min and cast into a film on a clean glass plate;

[0091] e. Drying after cooling, naturally cooling at room temperature for 22 hours, and then drying in a drying oven at 60℃ and 120℃ for 24 hours respectively;

[0092] f. After cooling, immerse in deionized water, remove the material and cool it naturally at room temperature, then immerse it in deionized water and peel it off;

[0093] g. Drying treatment: Dry in a vacuum oven at 62°C until constant weight is obtained to obtain CNT / PEEK composite film. Thermogravimetric curves of PEEK and composite materials with different surface modifications are shown in the figure. Figure 4 As shown in Figure 2, the storage modulus of PEEK and composite materials with different surface modifications varies with temperature. Figure 5 As shown in Figure 2, the glass transition temperature curves of PEEK and composite materials with different surface modifications are shown in Figure 2. Figure 6 As shown in Figure 2, the friction coefficient of PEEK and composite materials with different surface modifications varies with time. Figure 7 As shown;

[0094] Step 4: Hot pressing and sintering:

[0095] a. Pre-press into blocks. Pre-press CNT+PEEK+carbon fiber powder into blocks at a pressure of 3.5MPa inside the mold. The vacuum degree of the environment is guaranteed to be 100Pa. This process adopts a two-stage heating method for heating;

[0096] b. Continuously reduce the temperature and pressure to 200℃ and 3MPa at a rate of 16.7℃ / min and 1.1MPa / min;

[0097] c. Take out the mold for demoulding. When the furnace cooling temperature drops below 145°C, take out the mold for demoulding. The average friction coefficient and wear rate of PEEK and its composite materials under different load conditions are as follows: Figure 8 As shown in Figure 2, the average friction coefficient and wear rate of CNT / PEEK composite materials at different speeds are shown in Figure 2. Fig. 9 As shown;

[0098] Step 5: Performance testing:

[0099] a. Friction and wear test;

[0100] b. Resistance and wear correlation test;

[0101] c. Reveal the friction and wear mechanism of materials.

[0102] In one embodiment, the average friction coefficient and wear rate of PEEK and its composite materials under different load conditions, as well as the average friction coefficient and wear rate of CNT / PEEK composite materials under different rotational speeds are tested, and an aviation self-lubricating bushing service life evaluation test machine is used to carry out intelligent self-lubricating bushing friction and wear tests under laboratory conditions. The relationship between the resistance change and the wear state is determined by detecting and analyzing the resistance and wear data of the self-lubricating polymer material, and the microscopic morphology and composition of the worn surface of the self-lubricating polymer material are analyzed using characterization and analysis equipment such as a scanning electron microscope, an EDS spectrometer, and an X-ray photoelectron spectrometer to reveal the friction and wear mechanism of the intelligent self-lubricating polymer material.

[0103] Embodiment 3

[0104] like Figure 1 A polymer preparation process for polymer materials shown includes the following steps:

[0105] Step 1: CNT / PEEK composite:

[0106] like Figure 2 and Figure 3 As shown, 2 g of PEEK powder was dispersed in 20 ml of ethanol / distilled water solution, ultrasonically treated for 10 min and then magnetically stirred for 30 min, CNT was added to the 20 ml of water solution and ultrasonically treated, and then the mixed solution was magnetically stirred at 90 ° C until dry to obtain PEEK / CNT blended powder, and the PEEK / CNT blended powder was dried at 100 ° C and then compression molded to obtain PEEK / CNT composite materials. Figure 3 The effect of CNT addition on the resistivity of the composite material;

[0107] Step 2: Molding:

[0108] a. Load the dry resin into the mold;

[0109] b. After heating, keep the temperature and apply pressure. After the dry resin is loaded into the mold, keep the temperature at 400°C for 20 minutes, and apply a pressure of 10MPa during the heat preservation process, and keep it at this pressure for 40 minutes;

[0110] c. Material cooling: When cooling the material, cool it at a rate of 100℃ / min;

[0111] Step 3: Solution blending:

[0112] a. Acidification treatment: CNTs are acidified with HNO3;

[0113] b. Surface modification, using a non-ionic surfactant to further modify the surface of the acidified CNTs;

[0114] c. preparing a composite material, using N,N-dimethylformamide (DMF) as a solvent, and preparing a CNT / PEEK composite material by a solution blending method;

[0115] d. Casting film: The DMF solution containing CNTs and PEEK was mechanically stirred for 70 min and cast into a film on a clean glass plate;

[0116] e. Drying after cooling, naturally cooling at room temperature for 24 hours, and then drying in a drying oven at 60℃ and 120℃ for 24 hours respectively;

[0117] f. After cooling, immerse in deionized water, remove the material and cool it naturally at room temperature, then immerse it in deionized water and peel it off;

[0118] g. Drying treatment: Dry in a vacuum oven at 65°C until constant weight is obtained to obtain CNT / PEEK composite film. Thermogravimetric curves of PEEK and composite materials with different surface modifications are shown in the figure. Figure 4 As shown in Figure 2, the storage modulus of PEEK and composite materials with different surface modifications varies with temperature. Figure 5 As shown in Figure 2, the glass transition temperature curves of PEEK and composite materials with different surface modifications are shown in Figure 2. Figure 6 As shown in Figure 2, the friction coefficient of PEEK and composite materials with different surface modifications varies with time. Figure 7 As shown;

[0119] Step 4: Hot pressing and sintering:

[0120] a. Pre-press into blocks. Pre-press CNT+PEEK+carbon fiber powder into blocks at a pressure of 4MPa inside the mold. The vacuum degree of the environment is guaranteed to be 101Pa. This process adopts a two-stage heating method for heating;

[0121] b. Continuously reduce the temperature and pressure to 200℃ and 3MPa at a rate of 16.7℃ / min and 1.1MPa / min;

[0122] c. Take out the mold for demoulding. When the furnace cooling temperature drops below 140°C, take out the mold for demoulding. The average friction coefficient and wear rate of PEEK and its composite materials under different load conditions are as follows: Figure 8 As shown in Figure 2, the average friction coefficient and wear rate of CNT / PEEK composite materials at different speeds are shown in Figure 2. Fig. 9 As shown;

[0123] Step 5: Performance testing:

[0124] a. Friction and wear test;

[0125] b. Resistance and wear correlation test;

[0126] c. Reveal the friction and wear mechanism of materials.

[0127] In one embodiment, the average friction coefficient and wear rate of PEEK and its composite materials under different load conditions, as well as the average friction coefficient and wear rate of CNT / PEEK composite materials under different rotational speeds are tested, and an aviation self-lubricating bushing service life evaluation test machine is used to carry out intelligent self-lubricating bushing friction and wear tests under laboratory conditions. The relationship between the resistance change and the wear state is determined by detecting and analyzing the resistance and wear data of the self-lubricating polymer material, and the microscopic morphology and composition of the worn surface of the self-lubricating polymer material are analyzed using characterization and analysis equipment such as a scanning electron microscope, an EDS spectrometer, and an X-ray photoelectron spectrometer to reveal the friction and wear mechanism of the intelligent self-lubricating polymer material.

[0128] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of various changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A process for polymerizing and preparing polymer materials, characterized in that: The following steps are involved: Step 1: CNT / PEEK composite; Step 2: Molding: a. Load the dry resin into the mold; b. Keep the temperature and apply pressure after heating; c. Material cooling; Step 3: Solution blending: a. Acidification treatment; b. Surface modification; c. Preparation of composite materials; d. Cast film; e. Drying after cooling; f. After cooling, immerse in deionized water; g. Drying treatment; Step 4: Hot pressing and sintering: a. Pre-press into blocks; b. Continuous cooling and pressure relief; c. Take out the mold for demoulding; Step 5: Performance testing: a. Friction and wear test; b. Resistance and wear correlation test; c. Reveal the friction and wear mechanism of materials.

2. A process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step 1, 2 g of PEEK powder is dispersed in 20 ml of ethanol / distilled water solution, ultrasonically treated for 10 min and then magnetically stirred for 30 min, CNT is added to the 20 ml water solution and ultrasonically treated, and then the mixed solution is magnetically stirred at 90° C. until dry to obtain a PEEK / CNT blended powder, and the PEEK / CNT blended powder is dried at 100° C. and then compression molded to obtain a PEEK / CNT composite material.

3. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step 2, after the dry resin is loaded into the mold, it is kept at 350° C.-400° C. for 12 min-20 min, and a pressure of 2.5 MPa-10 MPa is applied during the heat preservation process, and this pressure is maintained for 30 min-40 min.

4. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step 2, when cooling the material, the temperature is cooled at a rate of 10°C / min-100°C / min.

5. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step three, during the acid treatment, the CNTs are acidified with H2SO4 / HNO3, and different surfactants are used to further modify the surface of the CNTs after the acid treatment.

6. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step three, N,N-dimethylformamide (DMF) is used as a solvent and a solution blending method is adopted to prepare the CNT / PEEK composite material.

7. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step three, the DMF solution containing CNTs and PEEK is mechanically stirred for 50 min-70 min, cast into a film on a clean glass plate, naturally cooled at room temperature for 20 h-24 h, and then placed in a drying oven and dried at 60 ° C and 120 ° C for 20 h-24 h. After drying, the material is taken out and naturally cooled at room temperature, then immersed in deionized water, peeled off, and dried in a vacuum drying oven at 60 ° C-65 ° C to constant weight to obtain a CNT / PEEK composite film.

8. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step 4, the CNT+PEEK+carbon fiber powder is pre-pressed into blocks at a pressure of 3MPa-4MPa inside the mold, and the vacuum degree of the environment is guaranteed to be 100Pa-101 Pa. This process adopts a two-stage heating method for heating.

9. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step 4, after the blocks are prefabricated, the temperature is continuously lowered and the pressure is released to 200°C and 3MPa at a rate of 16.7°C / min and 1.1MPa / min, and finally the temperature is cooled to below 150°C during furnace cooling, and the mold is taken out for demoulding.

10. The process for polymerizing and preparing polymer materials according to claim 1, characterized in that: In the step five, the average friction coefficient and wear rate of PEEK and its composite materials under different load conditions, as well as the average friction coefficient and wear rate of CNT / PEEK composite materials at different rotation speeds are tested, and an aviation self-lubricating bushing service life evaluation test machine is used to carry out intelligent self-lubricating bushing friction and wear tests under laboratory conditions. The relationship between resistance change and wear state is determined by detecting and analyzing the resistance and wear data of the self-lubricating polymer material, and the microscopic morphology and composition of the worn surface of the self-lubricating polymer material are analyzed using characterization and analysis equipment such as a scanning electron microscope, an EDS spectrometer, and an X-ray photoelectron spectrometer to reveal the friction and wear mechanism of the intelligent self-lubricating polymer material.

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