Printable polyether-ether-ketone ink, preparation method thereof and polyether-ether-ketone composite material

Abstract

The invention belongs to the technical field of polyether-ether-ketone materials, and particularly relates to printable polyether-ether-ketone ink, a preparation method of the printable polyether-ether-ketone ink and a polyether-ether-ketone composite material. The printable polyether-ether-ketone ink provided by the invention is prepared from the following components in parts by mass: 99 to 101 parts of 4-acryloylmorpholine, 5 to 20 parts of polyethylene glycol diacrylate-400, 30 to 35 parts of polyether-ether-ketone resin and 2 to 3 parts of a photoinitiator. According to the invention, polyether-ether-ketone resin (PEEK) particles are introduced into an acrylate photosensitive resin system (4-acryloylmorpholine and polyethylene glycol diacrylate-400), so that polyether-ether-ketone printing based on a digital light processing (DLP) technology is realized.

Description

Technical Field

[0002] This invention belongs to the field of polyetheretherketone (PEEK) material technology, specifically relating to a printable PEEK ink and its preparation method, as well as PEEK composite materials. Background Technology

[0003] Polyetheretherketone (PEEK), with its excellent thermal stability, mechanical strength, and chemical inertness due to its rigid aryl ether ketone backbone, has rapidly gained widespread application in aerospace, defense equipment, high-end medical devices, and microelectronic packaging. However, traditional thermoforming, extrusion, or injection molding processes are often limited by mold processing cycles, draft angles, and flow channel resistance when dealing with structures with high aspect ratios, complex internal cavities, and local thin walls, making it difficult to achieve precise three-dimensional configurations. At the same time, high melt viscosity leads to problems such as incomplete filling and internal stress concentration, which restricts the reliability of parts.

[0004] With the advent of additive manufacturing, technologies such as fused deposition modeling (FDM) and selective laser sintering (SLS) have been explored for PEEK processing. While FDM equipment is widely available, its operating temperature must be maintained above 400°C, placing stringent requirements on nozzle, hot end, and cavity temperature control. Furthermore, the layer-by-layer stacking process easily leads to weak adhesion at the interface, resulting in Z-axis strength of only 40% to 60% of the injection-molded part, along with high surface roughness and a significant amount of post-processing work. Although SLS can achieve near-full density, uneven laser energy absorption, powder spreading defects, and high equipment and maintenance costs make it uneconomical for small-batch, customized applications. More importantly, both FDM and SLS methods cannot escape the volume shrinkage and warping caused by the "melt-cool" physical phase transition, resulting in poor product dimensional accuracy and failing to meet the requirements for precision parts.

[0005] Digital light processing (DLP) technology, based on the principle of surface exposure polymerization, achieves one-time layer curing using a micron-level pixel array. Theoretically, it can improve printing resolution to ten to fifty microns and form overhanging structures without support, providing a new solution for complex geometric manufacturing. However, the glass transition temperature of traditional acrylic photosensitive resins is generally below 80°C, and the thermal decomposition onset temperature is less than 250°C, which is significantly different from the service window of PEEK (above 100°C). Directly introducing PEEK powder will cause a sharp increase in system viscosity and enhanced light scattering, thereby reducing curing depth and forming accuracy. How to integrate the inherent high-temperature characteristics and shape memory function of PEEK into a photocurable system without sacrificing resolution has become the core bottleneck restricting the printing of high-end PEEK components. Summary of the Invention

[0006] In view of this, the present invention provides a printable polyetheretherketone ink and its preparation method, as well as a polyetheretherketone composite material. The polyetheretherketone composite material obtained by printing with the printable polyetheretherketone ink has good mechanical properties, low coefficient of friction, and shape memory properties.

[0007] To address the aforementioned technical problems, this invention provides a printable polyetheretherketone ink, comprising the following components in parts by weight: 99-101 parts of 4-acryloylmorpholine; Polyethylene glycol diacrylate-400: 5-20 parts; 30-35 parts of polyetheretherketone resin; 2-3 parts of photoinitiator.

[0008] Preferably, the components include the following parts by weight: 100 parts of 4-acryloylmorpholine; Polyethylene glycol diacrylate-400: 5-20 parts; 33.33 parts of polyetheretherketone resin; 2.5 parts of photoinitiator.

[0009] Preferably, the polyetheretherketone resin is a polyetheretherketone resin powder, and the particle size of the polyetheretherketone resin powder is 500~1500nm; The photoinitiators include diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, lithium phenyl-2,4,6-trimethylbenzoylphosphonate, and phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

[0010] The present invention also provides a method for preparing the printable polyetheretherketone ink described in the above technical solution, comprising the following steps: 4-Acryloylmorpholine and polyethylene glycol diacrylate-400 were first mixed to obtain a mixed solution; The polyetheretherketone resin and the mixed solution are mixed a second time to obtain a suspension; The suspension and photoinitiator are mixed to obtain the printable polyetheretherketone ink.

[0011] Preferably, the first mixing is carried out under stirring conditions, and the stirring time is 22-26 hours.

[0012] Preferably, the second mixing includes the following steps: adding polyetheretherketone resin to the mixed solution and then sequentially performing shear dispersion and ultrasonic treatment.

[0013] Preferably, the rotational speed of the shearing dispersion is 10,000 to 25,000 rpm, and the time is 8 to 25 minutes; the power of the ultrasonic treatment is 500 to 1,500 W, the frequency is 20 to 40 kHz, and the time is 10 to 30 minutes.

[0014] Preferably, the third mixing is carried out under stirring conditions, and the stirring time is 30~150 min.

[0015] The present invention also provides a polyetheretherketone composite material, the preparation method of which includes the following steps: The polyetheretherketone (PEEK) composite material is obtained by printing using the printable PEEK ink followed by photocuring. The printable PEEK ink is the printable PEEK ink described in the above technical solution or the printable PEEK ink prepared by the preparation method described in the above technical solution.

[0016] Preferably, the thickness of the printed single layer is 10~100μm, and the exposure time is 10~15s / layer; The light source for photocuring is ultraviolet light, and the photocuring time is 8~12 minutes.

[0017] This invention provides a printable polyetheretherketone (PEEK) ink, comprising the following components in parts by weight: 99-101 parts 4-acryloylmorpholine, 5-20 parts polyethylene glycol diacrylate-400, 30-35 parts polyetheretherketone resin, and 2-3 parts photoinitiator. This invention achieves PEEK printing based on digital light processing (DLP) technology by introducing PEEK resin (PEEK) particles into an acrylate-based photosensitive resin system (4-acryloylmorpholine, polyethylene glycol diacrylate-400).

[0018] This invention also provides a polyetheretherketone (PEEK) composite material. The preparation method of the PEEK composite material includes the following steps: printing using the printable PEEK ink followed by photocuring to obtain the PEEK composite material; the printable PEEK ink is the printable PEEK ink described in the above technical solution or the printable PEEK ink prepared by the preparation method described in the above technical solution. This invention utilizes printing (e.g., digital light processing printing) to form a cross-linked network structure of photopolymerized 4-acryloylmorpholine (ACMO) that binds to the PEEK resin (PEEK). By restricting the formation of independent micro-regions in PEEK, a shape memory mechanism is achieved through the phase transition of PEEK, giving the PEEK composite material excellent thermally induced shape memory properties (optimal shape fixation rate >98%, optimal shape recovery rate >99%). Simultaneously, the PEEK composite material exhibits a low coefficient of friction (COF can be <0.1) and excellent wear resistance, making it suitable for customized manufacturing of high-wear-resistant moving parts such as bearings; based on its thermally induced shape memory (SME) effect, it can be applied in the field of intelligent lubrication technology. Attached Figure Description

[0019] Figure 1 A schematic diagram of a product obtained by DLP printing using printable polyetheretherketone ink, wherein (a) is a schematic diagram of the polymer network formed by ACMO, PEGDA400 and PEEK, and (b) is a photograph of the printed impeller, blades and bearings. Figure 2 The stress-strain curves at room temperature (25°C) of the polyetheretherketone composite materials prepared in Examples 1-3 are shown. Figure 3 The following is a bar chart comparing the tensile strength of the polyetheretherketone composite materials prepared in Examples 1-3; Figure 4 The graph shows a comparison of the elongation at break of the polyetheretherketone composite materials prepared in Examples 1-3. Figure 5 The graph shows a comparison of the Young's modulus of the polyetheretherketone composite materials prepared in Examples 1-3. Figure 6 The high-temperature (100°C) stress-strain curves of the polyetheretherketone composite materials prepared in Examples 1-3 are shown. Figure 7 Compression curves of the polyetheretherketone composite materials prepared in Examples 1-3; Figure 8 The friction coefficient variation curves of the polyetheretherketone composite material obtained in Example 2 under different loads at room temperature are shown. Figure 9 The coefficient of friction (COF) of the polyetheretherketone composite material obtained in Example 2 varies under a 3N load at different temperatures. Figure 10 This is a shape memory demonstration diagram of the polyetheretherketone composite material prepared in Example 2; Figure 11 The DMA shape memory curve of the polyether ether ketone composite material obtained in Example 2 is shown. Detailed Implementation

[0020] This invention provides a printable polyetheretherketone ink, comprising the following components in parts by weight: 99-101 parts of 4-acryloylmorpholine; Polyethylene glycol diacrylate-400: 5-20 parts; 30-35 parts of polyetheretherketone resin; 2-3 parts of photoinitiator.

[0021] In this invention, unless otherwise specified, all materials are conventional commercially available products.

[0022] The printable polyetheretherketone ink provided by this invention comprises 99-101 parts of 4-acryloylmorpholine, specifically 100 parts, by weight. In this invention, the 4-acryloylmorpholine (ACMO) is a photopolymerizable monomer.

[0023] Based on the mass fraction of 4-acryloylmorpholine, the printable polyetheretherketone ink provided by this invention comprises 5 to 20 parts of polyethylene glycol diacrylate-400, specifically 5 parts, 8 parts, 10 parts, 15 parts, or 20 parts. In this invention, the polyethylene glycol diacrylate-400 (PEGDA400) acts as a chain extender and crosslinking agent.

[0024] Based on the mass fraction of 4-acryloylmorpholine, the printable polyetheretherketone (PEEK) ink provided by this invention comprises 30-35 parts of PEEK resin, specifically 32 parts, 33.33 parts, or 34 parts. In one specific embodiment of this invention, the PEEK resin can be PEEK resin powder, and the particle size of the PEEK resin powder can be 500-1500 nm, 800-1300 nm, or even 1000-1200 nm. This invention limits the particle size of the PEEK resin powder to within the above range, which is beneficial to the dispersion stability of the PEEK resin in the ink, thereby ensuring printing accuracy.

[0025] Based on the mass fraction of 4-acryloylmorpholine, the printable polyetheretherketone ink provided by this invention comprises 2 to 3 parts of photoinitiator, specifically 2 parts, 2.5 parts, or 3 parts. As a specific embodiment of this invention, the photoinitiator may include diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide (TPO), lithium phenyl-2,4,6-trimethylbenzoylphosphonate, or phenylbis(2,4,6-trimethylbenzoyl)phosphine oxide.

[0026] The present invention also provides a method for preparing the printable polyetheretherketone ink described in the above technical solution, comprising the following steps: 4-Acryloylmorpholine and polyethylene glycol diacrylate-400 were first mixed to obtain a mixed solution; The polyetheretherketone resin and the mixed solution are mixed a second time to obtain a suspension; The suspension and photoinitiator are mixed to obtain the printable polyetheretherketone ink.

[0027] This invention involves first mixing 4-acryloylmorpholine and polyethylene glycol diacrylate-400 to obtain a mixed solution. In one specific embodiment, the first mixing can be carried out under stirring conditions, wherein the stirring can be magnetic stirring, and the stirring time can be 1.8~2.2 hours, specifically 2 hours; the stirring temperature can be room temperature, which can be 20~35℃, or even 2~30℃. In this invention, the mixed solution is a homogeneous and transparent solution, and the mixed solution is a photosensitive resin system.

[0028] After obtaining the mixed solution, the present invention further mixes the polyetheretherketone resin and the mixed solution to obtain a suspension. In one specific embodiment of the present invention, the second mixing may include the following steps: adding polyetheretherketone resin to the mixed solution followed by shear dispersion and ultrasonic treatment; the rotation speed of the shear dispersion can be 10000~25000 rpm, specifically 15000 rpm, 20000 rpm, or 23000 rpm; the shear dispersion time can be 8~25 min, or 10~20 min; the ultrasonic treatment power can be 500~1500 W, specifically 800 W, 1000 W, or 1200 W; the ultrasonic treatment frequency can be 20~40 kHz, specifically 25 kHz, 30 kHz, or 35 kHz; the ultrasonic treatment time can be 10~30 min, specifically 15 min, 20 min, or 25 min.

[0029] After obtaining the suspension, the present invention mixes the suspension with a photoinitiator in a third step to obtain the printable polyetheretherketone ink. In one specific embodiment of the present invention, the third mixing can be carried out under stirring conditions, and the stirring time is 30-150 minutes, specifically 30 minutes, 60 minutes, 90 minutes, or 120 minutes. The present invention does not have a particular limitation on the stirring speed, as long as it ensures uniform mixing.

[0030] The present invention also provides a polyetheretherketone composite material, the preparation method of which includes the following steps: The polyetheretherketone (PEEK) composite material is obtained by printing using the printable PEEK ink followed by photocuring. The printable PEEK ink is the printable PEEK ink described in the above technical solution or the printable PEEK ink prepared by the preparation method described in the above technical solution.

[0031] In one specific embodiment of the present invention, the printing can be digital light processing (DLP) printing, and the printer used for digital light processing printing can be AnyCubic PHOTON; the thickness of a single layer can be 10~100μm, or 20~80μm, or even 30~50μm; the exposure time for printing can be 10~15s / layer, or 12~14s / layer; the light source for photocuring can be ultraviolet light, and the wavelength of the ultraviolet light can be 365nm; the photocuring time can be 8~12min, specifically 9min, 10min, or 11min.

[0032] In this invention, modeling is performed using computer modeling software during the printing process, followed by slicing using slicing software; the computer modeling software includes 3DMAX, CAD, Solidworks, or Blender. This invention does not have special requirements for the slicing software; conventional slicing software in the art can be used.

[0033] Figure 1 To obtain a schematic diagram of the product by using printable polyetheretherketone ink for DLP printing, (a) is a schematic diagram of the polymer network formed by ACMO, PEGDA400 and PEEK, and (b) is a photograph of the printed impeller, blades and bearing.

[0034] This invention uses polyetheretherketone (PEEK) as a matrix to print materials via DLP (Digital Laser Processing). The resulting printed materials exhibit excellent properties, including mechanical properties, low coefficient of friction, and shape memory properties. This invention constructs an acrylate / ether ester crosslinking network with a refractive index matching that of PEEK through molecular design, encapsulating PEEK within the crosslinking network to achieve a composite resin with high solids content, low viscosity, and high curing rate. Furthermore, by utilizing crosslinking density control, PEEK particles are activated during heating and locked during cooling, thereby endowing the printed components with controllable and cyclic thermo-induced shape memory behavior.

[0035] The polyetheretherketone (PEEK) composite material provided by this invention not only retains the high-temperature stability and mechanical strength of PEEK, but also possesses excellent thermal response shape memory properties and a low coefficient of friction. Furthermore, it can achieve the precise fabrication of complex structures through DLP printing.

[0036] To further illustrate the present invention, the technical solutions provided by the present invention will be described in detail below with reference to the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0037] Example 1 100 parts of 4-acryloylmorpholine and 5 parts of polyethylene glycol diacrylate-400 were stirred at room temperature (25°C) for 24 hours. Then, 33.33 parts of polyetheretherketone resin powder with a particle size of about 1000 nm were added and sheared at 12000 rpm for 10 minutes. Ultrasonic dispersion was carried out at 800 W and 30 kHz for 20 minutes. Then, 3 parts of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide were added and stirring was continued for 120 minutes to obtain printable polyetheretherketone ink. Modeling was performed using computer modeling software (Solidworks), followed by slicing using slicing software. Digital light processing printing was then performed using printable polyetheretherketone (PEEK) ink, followed by photocuring to obtain a PEEK composite material, denoted as PEEK-A5. The digital light processing printing conditions were: a single-layer thickness of 50 μm and an exposure time of 12 s / layer. The photocuring conditions were: ultraviolet light with a wavelength of 365 nm and a photocuring time of 10 min.

[0038] Example 2 100 parts of 4-acryloylmorpholine and 10 parts of polyethylene glycol diacrylate-400 were stirred at room temperature (25°C) for 24 hours. Then, 33.33 parts of polyetheretherketone resin powder with a particle size of about 1000 nm were added and sheared at 20000 rpm for 20 minutes. Ultrasonic dispersion was carried out at 1000 W and 35 kHz for 25 minutes. Then, 3 parts of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide were added and stirring was continued for 120 minutes to obtain printable polyetheretherketone ink. Modeling was performed using computer modeling software (Solidworks), followed by slicing using slicing software. Digital light processing printing was then performed using printable polyetheretherketone (PEEK) ink, followed by photocuring to obtain the PEEK composite material, denoted as PEEK-A10. The digital light processing printing conditions were: a single-layer thickness of 50 μm and an exposure time of 12 s / layer. The photocuring conditions were: ultraviolet light with a wavelength of 365 nm and a photocuring time of 10 min.

[0039] Example 3 100 parts of 4-acryloylmorpholine and 20 parts of polyethylene glycol diacrylate-400 were stirred at room temperature (25°C) for 24 hours. Then, 33.33 parts of polyetheretherketone resin powder with a particle size of about 1000 nm were added and sheared at 23000 rpm for 20 minutes. Ultrasonic dispersion was carried out at 1200 W and 40 kHz for 20 minutes. Then, 3 parts of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide were added and stirring was continued for 120 minutes to obtain printable polyetheretherketone ink. The model was created using computer modeling software (Solidworks), and then sliced ​​using slicing software. The polyetheretherketone (PEEK) composite material, designated PEEK-A20, was obtained through digital light processing printing using printable PEEK ink followed by photocuring. The digital light processing printing conditions were: a single-layer thickness of 50 μm and an exposure time of 12 s / layer. The photocuring conditions were: ultraviolet light with a wavelength of 365 nm and a photocuring time of 10 min.

[0040] The mechanical properties of the polyetheretherketone composite materials prepared in Examples 1-3 were tested according to the national standard GB / T 1040.1-2018, and the results are listed in Table 1; the stress-strain curves at room temperature (25℃) are shown below. Figure 2 As shown, the obtained tensile strength histogram comparison is as follows: Figure 3 As shown, the obtained fracture elongation histogram comparison is as follows: Figure 4 As shown, the obtained Young's modulus histogram comparison is as follows: Figure 5 As shown, the obtained high-temperature (100℃) stress-strain curve is as follows: Figure 6 As shown, the obtained compression curve is as follows: Figure 7 As shown.

[0041] Table 1 Mechanical properties of the polyetheretherketone composite materials prepared in Examples 1-3

[0042] Combining Table 1 and Figures 2-5 It can be seen that the change in PEGDA400 content has a relatively small impact on the overall mechanical properties of polyetheretherketone (PEEK) composites: when the PEGDA content increases from 5% to 20%, the material strength slightly increases from 49 MPa to 59 MPa; this reinforcing effect is attributed to the increased flexibility of PEGDA segments improving the network crosslinking degree, thereby increasing the overall strength of PEEK-A20. Although the tensile strength (59 MPa) of the 3D-printed PEEK-based composite is lower than that of conventional injection-molded PEEK (>80 MPa), it is significantly improved compared to photopolymer-cured 3D-printed PEEK materials.

[0043] Depend on Figure 6It can be seen that the polyether ether ketone composite material (PEEK-Ax) still maintains excellent tensile strength under high temperature conditions. Moreover, with the increase of PEGDA content, the deformation mechanism of the material at high temperature changes from brittle fracture to plastic deformation. The elongation at break of PEEK-A5, PEEK-A10, and PEEK-A20 is 4%, 10%, and 15%, respectively.

[0044] Depend on Figure 7 As can be seen from the compression performance test, the material exhibits excellent mechanical elasticity. The compressive strength of all three PEEK-Ax materials exceeds 75 MPa, with PEEK-A5, PEEK-A10, and PEEK-A20 samples showing compressive strengths of 75 MPa, 88 MPa, and 100 MPa, respectively. This superior compressive performance ensures the reliability of the material under mechanical loads and effectively prevents structural failure during use.

[0045] According to the standard GB / T 10006-2021 for friction and wear testing methods, under dry friction conditions, a ball-disc reciprocating friction and wear testing machine was used to systematically evaluate the tribological properties of the polyetheretherketone (PEEK) composite material prepared in Example 2. The coefficient of friction (COF) variation curves of PEEK-A10 under different loads at 25℃ are shown below. Figure 8 As shown; the coefficient of friction (COF) variation curves of PEEK-A10 at different temperatures under a 3N load are as follows. Figure 9 As shown.

[0046] Depend on Figure 8 It can be seen that the polyetheretherketone (PEEK) composite material exhibits excellent load-adaptive properties, maintaining stable values ​​of 0.03, 0.04, 0.06, and 0.07 under loads of 1N, 2N, 3N, and 5N, respectively. Depend on Figure 9 It can be seen that PEEK-A10 exhibits good tribological properties in the temperature range of 60°C, 80°C, 100°C, 120°C, and 140°C; when the temperature rises from 60°C to 110°C, the COF remains stable and consistently below 0.1. However, at 140°C (above the glass transition temperature Tg≈110°C), the COF gradually increases from 0.13 to 0.2 within 30 minutes. This increase is attributed to the softening of the friction interface at high temperatures, which enhances plastic deformation and increases sliding resistance.

[0047] Shape memory demonstration: The glass transition temperature of the material was obtained by testing with DMA (DMA850). The glass transition temperature of the polyether ether ketone composite material prepared in Example 1 was selected for testing. The final glass transition temperature (Tg) of the sample was 110℃.

[0048] The thermal response shape memory of the printed mesh was demonstrated, with a fixed temperature of room temperature (approximately 25°C) and a recovery temperature of 130°C. Figure 10 This is a shape memory demonstration diagram of the polyetheretherketone composite material prepared in Example 2. Figure 10 It can be seen that polyetheretherketone composite material has a shape memory effect; it deforms at 130℃, is fixed to a temporary shape at room temperature, and when heated again at 130℃, the material shape will return to its original shape.

[0049] The shape memory properties (shape recovery rate and shape fixation rate) of the polyetheretherketone composite material (PEEK-A10) prepared in Example 2 were tested according to the DMA (Dynamic Mechanical Analysis) shape memory test method. The sample was stretched to 110% at 130°C, then cooled to 30°C for fixation, and subsequently reheated to 130°C to obtain the DMA shape memory map. Figure 11 As shown. By Figure 11 As can be seen, PEEK-A10 achieved an optimal shape retention rate of 98% and an optimal shape recovery rate of 99% across five cycles, remaining stable throughout multiple cycles. This invention achieves high-precision printing while simultaneously providing the polyetheretherketone composite material with shape memory functionality.

[0050] Although the above embodiments have provided a detailed description of the present invention, they are only some embodiments of the present invention, and not all embodiments. People can obtain other embodiments based on these embodiments without creative effort, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A printable polyetheretherketone ink, characterized in that, The components include the following parts by weight: 99-101 parts of 4-acryloylmorpholine; Polyethylene glycol diacrylate-400: 5-20 parts; 30-35 parts of polyetheretherketone resin; 2-3 parts of photoinitiator.

2. The printable polyetheretherketone ink according to claim 1, characterized in that, The components include the following parts by weight: 100 parts of 4-acryloylmorpholine; Polyethylene glycol diacrylate-400: 5-20 parts; 33.33 parts of polyetheretherketone resin; 2.5 parts of photoinitiator.

3. The printable polyetheretherketone ink according to claim 1, characterized in that, The polyetheretherketone resin is a polyetheretherketone resin powder, and the particle size of the polyetheretherketone resin powder is 500~1500nm. The photoinitiators include diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, lithium phenyl-2,4,6-trimethylbenzoylphosphonate, and phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide.

4. The method for preparing the printable polyetheretherketone ink according to any one of claims 1 to 3, characterized in that, Includes the following steps: 4-Acryloylmorpholine and polyethylene glycol diacrylate-400 were first mixed to obtain a mixed solution; The polyetheretherketone resin and the mixed solution are mixed a second time to obtain a suspension; The suspension and photoinitiator are mixed to obtain the printable polyetheretherketone ink.

5. The preparation method according to claim 4, characterized in that, The first mixing is carried out under stirring conditions, and the stirring time is 22-26 hours.

6. The preparation method according to claim 4, characterized in that, The second mixing includes the following steps: adding polyetheretherketone resin to the mixed solution and then sequentially performing shear dispersion and ultrasonic treatment.

7. The preparation method according to claim 6, characterized in that, The shearing dispersion is performed at a rotation speed of 10,000 to 25,000 rpm for 8 to 25 minutes; the ultrasonic treatment is performed at a power of 500 to 1,500 W, a frequency of 20 to 40 kHz, and a duration of 10 to 30 minutes.

8. The preparation method according to claim 4, characterized in that, The third mixing is carried out under stirring conditions, and the stirring time is 30~150 min.

9. A polyetheretherketone composite material, characterized in that, The preparation method of the polyetheretherketone composite material includes the following steps: The polyetheretherketone (PEEK) composite material is obtained by printing using the printable PEEK ink followed by photocuring. The printable PEEK ink is the printable PEEK ink according to any one of claims 1 to 3 or the printable PEEK ink prepared by the preparation method according to any one of claims 4 to 8.

10. The polyetheretherketone composite material according to claim 9, characterized in that, The thickness of a single printed layer is 10~100μm, and the exposure time is 10~15s / layer; The light source for photocuring is ultraviolet light, and the photocuring time is 8~12 minutes.

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