A twin-screw extrusion device for producing carbon fiber reinforced resin matrix composites, a production method and a product

Abstract

The application discloses a double-screw extrusion device for preparing carbon fiber reinforced resin matrix composite material, a preparation method and a product, and belongs to the technical field of composite materials. The double-screw extrusion device comprises a cylinder and a screw, the screw is located in the cylinder, and the double-screw extrusion device comprises a feeding section, a mixing section, a shearing section, an exhaust section and a discharging section. The screw of the mixing section comprises a meshing block; the screw of the shearing section comprises a reverse thread; and the cylinder of the exhaust section comprises an exhaust port. The application also discloses a method for preparing the carbon fiber reinforced resin matrix composite material by using the device and a carbon fiber reinforced resin matrix composite material product. The application fully considers the problems of uneven material mixing and exhaust, and through cooperation of multiple sections, the technical effects of uniform mixing, few pores and uniform length of cut carbon fibers are achieved. Moreover, the device and the preparation method are beneficial to popularization and use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of composite materials, in particular to a double screw extrusion device for preparing carbon fiber reinforced resin matrix composite material, a preparation method and a product. BACKGROUND

[0002] Carbon fiber is a fibrous microcrystalline graphite material with high carbon content. Compared with ordinary materials, carbon fiber has the advantages of corrosion resistance, high temperature resistance, fatigue resistance, high strength, high modulus, electrical conductivity and dimensional stability, and has been widely used in aerospace, transportation, sports and leisure and other fields. But carbon fiber cannot be used directly because of its fibrous characteristics. In most cases, it is combined with ceramic, metal, resin and other matrices to form a composite material, and finally processed into the required structure for use. Among them, the most studied and applied is carbon fiber reinforced resin matrix composite material which uses carbon fiber as the reinforcing body and synthetic resin as the matrix. This material has the most comprehensive properties among existing structural materials, and this high-performance composite material occupies an irreplaceable position in modern advanced composite materials, and is therefore known as the most life-generating molding material in the 21st century.

[0003] However, the preparation process of chopped carbon fiber reinforced resin matrix composite material in the prior art is not mature enough, and problems such as uneven mixing, poor orientation of carbon fiber, uneven length of carbon fiber and air bubbles and holes are prone to occur, which greatly reduces the mechanical properties of the composite material and does not achieve the expected technical effect.

[0004] Therefore, how to provide a method for improving the mechanical properties of chopped carbon fiber reinforced resin matrix composite material is a technical problem that those skilled in the art need to solve. SUMMARY

[0005] The purpose of the present application is to provide a double screw extrusion device for preparing carbon fiber reinforced resin matrix composite material, a preparation method and a product to solve the above problems of uneven mixing, holes and uneven length of carbon fiber.

[0006] To achieve the above purpose, the present application provides the following solutions:

[0007] A double screw extrusion device for preparing carbon fiber reinforced resin matrix composite material, comprising a barrel and a screw, the screw being located in the barrel, the double screw extrusion device comprising a feeding section, a mixing section, a shearing section, an exhaust section and a discharging section;

[0008] Among them,

[0009] The screw of the mixing section comprises a meshing block;

[0010] The screw of the shearing section comprises a reverse thread;

[0011] The barrel of the exhaust section comprises an exhaust port.

[0012] More preferably, the screw rotates clockwise, the inner diameter of the screw is 16mm, the outer diameter of the screw is 25mm, the center distance of the two screws is 21mm, the axial gap of the engaging block is 0.5mm, and the inner diameter of the barrel is 26mm.

[0013] The clockwise rotation of the screw in the application is beneficial to the transportation of the carbon fiber and the resin material.

[0014] Preferably, the barrel of the feeding section comprises a feeding port, and the screw comprises a first double-thread, a second double-thread and a third double-thread with gradually decreasing pitches.

[0015] More preferably, the pitch of the first double-thread is 25mm, the pitch of the second double-thread is 20mm, and the pitch of the third double-thread is 15mm.

[0016] The feeding section is mainly used for feeding and transporting the material to the next part.

[0017] Preferably, the number of the engaging blocks is 5, and the engaging blocks are arranged in sequence with a rotation angle of 45° and the same rotation direction as the thread direction of the screw of the feeding section.

[0018] More preferably, the width of the engaging block is 5mm, and the height of the engaging block is equal to the outer diameter of the screw.

[0019] The engaging block in the application is beneficial to the melting and mixing of the carbon fiber and the resin material.

[0020] Preferably, the number of the reverse threads is 2, and the pitch of the reverse threads is 15mm.

[0021] The pitch of the reverse thread in the application is small, the pressure is large, and the shearing effect is strong, so that the reverse thread can be used for shearing the carbon fiber and highly mixing the two materials.

[0022] Preferably, the exhaust section further comprises a fourth double-thread and a fifth double-thread with gradually increasing pitches.

[0023] More preferably, the pitch of the fourth double-thread is 20mm, and the pitch of the fifth double-thread is 30mm.

[0024] The larger pitch is used for reducing the pressure and increasing the surface area of the carbon fiber and the resin material in contact with the device, which is beneficial to the exhaust.

[0025] Preferably, the barrel of the discharging section comprises a discharging port, and the screw comprises a sixth double-thread, a seventh double-thread and an eighth double-thread with gradually decreasing pitches.

[0026] More preferably, the sixth double-start thread has a pitch of 25 mm, the seventh double-start thread has a pitch of 20 mm, and the eighth double-start thread has a pitch of 15 mm.

[0027] The gradually decreasing pitch of the discharging section in the application can achieve the effect of pressure boosting, which is beneficial to the extrusion of the composite material.

[0028] A preparation method of a carbon fiber reinforced resin-based composite material, which is prepared by using the double-screw extrusion device for preparing the carbon fiber reinforced resin-based composite material, and specifically comprises the following steps:

[0029] (1) carbon fibers are added into a beaker, and a water solution is added at 600 ml of water per gram of carbon fibers, and ultrasonic oscillation is performed for 10 min; in this process, the carbon fibers tend to be singulated under the action of a large number of micro-bubbles generated by ultrasonic waves during the vibration process; a dispersing agent is then added, and after uniform stirring, ultrasonic oscillation is continued for 10 min; then a defoaming agent is added dropwise until the bubbles disappear; then water is added for dilution, filtration, and drying to obtain treated chopped carbon fibers;

[0030] (2) the resin material is dried and dehydrated to obtain dried resin material;

[0031] (3) the treated chopped carbon fibers and the dried resin material are mixed, and then added from a feeding port to the double-screw extrusion device for preparing the carbon fiber reinforced resin-based composite material for extrusion granulation; then injection molding, freezing and brittle fracture in liquid nitrogen, and gold spraying treatment on the fracture surface are sequentially performed to obtain the carbon fiber reinforced resin-based composite material.

[0032] Preferably, the mass ratio of the carbon fibers, the dispersing agent, and the dried resin material is (10-40):1:(59-89).

[0033] The resin material comprises nylon 66 (polyhexamethylene adipamide);

[0034] The dispersing agent comprises one of methyl cellulose, carboxymethyl cellulose, and hydroxyethyl cellulose.

[0035] The defoaming agent comprises tributyl phosphate.

[0036] Beneficial effects: the carbon fibers can be fully dispersed by ultrasonic oscillation for pre-dispersion before the addition of the dispersing agent, and further stirring and oscillation after the addition of the dispersing agent, which facilitates subsequent mixing with nylon 66; the injection molding, freezing and brittle fracture, and gold spraying after extrusion granulation facilitate the observation of the results.

[0037] Preferably, the ultrasonic oscillation temperature in step (1) is 38-44℃.

[0038] The drying temperature is 280-290 DEG C, and the time is 5-6h;

[0039] The drying temperature in step (2) is 120-130 DEG C, and the time is 6-7h;

[0040] The extrusion temperature in step (3) is 250 DEG C-300 DEG C, the inlet pressure is 0.1 MPa, and the outlet is free outlet;

[0041] The injection molding is: according to ISO-527-1 standard size injection molding, and the injection molding temperature is 320 DEG C;

[0042] The frozen brittle fracture time is: after being frozen in liquid nitrogen for 5 min, the sample is taken out and broken;

[0043] The spraying gold treatment is: using a spraying instrument (ion sputtering instrument) to plate an additional conductive thin layer material (platinum, silver, chromium, etc.) on the section surface, so as to prevent the structure from being damaged during scanning, and play a protective role.

[0044] A kind of carbon fiber reinforced resin matrix composite material is prepared by the preparation method of carbon fiber reinforced resin matrix composite material.

[0045] The application discloses a double-screw extrusion device for preparing carbon fiber reinforced resin matrix composite material, a preparation method and a product. The extrusion device adopts the combined use of engaging blocks and reverse threads, wherein the engaging blocks can melt and mix the two materials, and the reverse threads can cut the long carbon fibers by taking advantage of high shear strength, so that the carbon fibers are more uniform in length and more conducive to the dispersion and mixing of the two materials, so that the dispersion and mixing are uniform. In addition, the carbon fibers are pretreated before extrusion granulation in the preparation process of the carbon fiber reinforced resin matrix composite material, the carbon fibers are singulated by using a dispersing agent and ultrasonic oscillation, which is more conducive to the dispersion and mixing of the composite material during extrusion, improves the uniformity of the mixed material, and further improves the mechanical properties of the composite material. BRIEF DESCRIPTION OF DRAWINGS

[0046] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below.

[0047] Figure 1This is a schematic diagram of a twin-screw extruder for preparing carbon fiber reinforced resin matrix composites in Embodiment 1 of the present invention;

[0048] The labels are as follows: 1-barrel, 2, 3-screw, 4-feed inlet, 5-first double-ended thread, 6-second double-ended thread, 7-third double-ended thread, 8-meshing block, 9-reverse thread, 10-fourth double-ended thread, 11-fifth double-ended thread, 12-sixth double-ended thread, 13-seventh double-ended thread, 14-eighth double-ended thread, 15-vent, 16-discharge port, 30-feed section, 40-mixing section, 50-shearing section, 60-vent section, 70-discharge section;

[0049] Figure 2 This is a separation scale diagram of the product obtained in Example 2 of the present invention;

[0050] Figure 3 This is a graph showing the concentration deviation of the product obtained in Example 2 of the present invention;

[0051] Figure 4 This is a comparison diagram of the separation scale of the products obtained in Example 2 and Comparative Example 1 of the present invention;

[0052] Figure 5 This is a comparison chart of the concentration deviations of the products obtained in Example 2 and Comparative Example 1 of the present invention. Detailed Implementation

[0053] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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.

[0054] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0055] Example 1

[0056] A twin-screw extruder for preparing carbon fiber reinforced resin matrix composites, such as Figure 1 As shown, the device includes a barrel 1 and screws 2 and 3. Screws 2 and 3 are located inside the barrel 1, and the rotation direction of screws 2 and 3 is clockwise. The inner diameter of screws 2 and 3 is 16 mm, the outer diameter of screws 2 and 3 is 25 mm, the center distance between the two screws is 21 mm, the axial clearance of the meshing block 8 is 0.5 mm, and the inner diameter of the barrel 1 is 26 mm.

[0057] The twin-screw extruder includes a feeding section 30, a mixing section 40, a shearing section 50, a venting section 60, and a discharge section 70.

[0058] Further, the machine barrel 1 of the feeding section 30 comprises a feeding port 4, and the screws 2 and 3 comprise a first double thread 5, a second double thread 6 and a third double thread 7 with decreasing pitches.

[0059] Further, the machine barrel 1 of the feeding section 30 comprises a feeding port 4, and the screws 2 and 3 comprise a first double thread 5, a second double thread 6 and a third double thread 7 with decreasing pitches.

[0060] Further, the screws 2 and 3 of the mixing section 40 comprise the engaging blocks 8; the engaging blocks 8 are arranged in sequence with 5 pieces and a rotation angle of 45°, and the rotation direction is the same as the thread direction of the screws in the feeding section 30.

[0061] Further, the screws 2 and 3 of the mixing section 40 comprise the engaging blocks 8; the engaging blocks 8 are arranged in sequence with 5 pieces and a rotation angle of 45°, and the rotation direction is the same as the thread direction of the screws in the feeding section 30.

[0062] Further, the screws 2 and 3 of the mixing section 40 comprise the engaging blocks 8; the engaging blocks 8 are arranged in sequence with 5 pieces and a rotation angle of 45°, and the rotation direction is the same as the thread direction of the screws in the feeding section 30.

[0063] Further, the machine barrel 1 of the exhaust section 60 comprises an exhaust port 15, and further comprises a fourth double thread 10 and a fifth double thread 11 with increasing pitches.

[0064] Further, the machine barrel 1 of the exhaust section 60 comprises an exhaust port 15, and further comprises a fourth double thread 10 and a fifth double thread 11 with increasing pitches.

[0065] Further, the machine barrel 1 of the exhaust section 60 comprises an exhaust port 15, and further comprises a fourth double thread 10 and a fifth double thread 11 with increasing pitches.

[0066] Further, the machine barrel 1 of the exhaust section 60 comprises an exhaust port 15, and further comprises a fourth double thread 10 and a fifth double thread 11 with increasing pitches.

[0067] Working principle:

[0068] When the double screw extrusion device works, firstly, the chopped carbon fiber and resin material are discharged from the feeding port 4, the pitch of the first double thread 5, the second double thread 6 and the third double thread 7 of the feeding section decreases in turn, which leads to the increase of pressure, promotes the forward conveying of the material and realizes the preliminary mixing, and meanwhile, the two screws 2 and 3 which are engaged in the same direction are also beneficial to the forward pushing of the material; the mixing section 40 is composed of the engaging blocks 8 which are beneficial to the dispersion and mixing of the raw materials, and the engaging blocks 8 are closely arranged, the temperature of the material rises when the material is sheared due to the increase of the shearing pressure, which is greater than the melting temperature 260℃, so that the two raw materials can be further mixed; when the mixed material enters the shearing section 50, the reverse thread 9 with small pitch can provide greater pressure and shearing stress, which can further shear the chopped carbon fiber, so that the fiber length is more uniform, which is beneficial to the dispersion and mixing of the raw materials, and the chopped carbon fiber with similar length can also improve the mechanical properties of the composite material; the exhaust section 60 is responsible for the exhaust work of the material after mixing and shearing, after the mixing and shearing work of the material at high temperature and high pressure in the previous two stages, a large amount of bubbles will be generated, if the bubbles are not discharged in time, a large number of holes will be mixed in the subsequent finished product, which will affect the mechanical properties of the material, therefore, the exhaust section 60 is provided with an exhaust port on the barrel 1, and the screws 2 and 3 are provided with the fourth double thread 10 and the fifth double thread 11 with increasing pitch, which can increase the surface area that can be contacted by the screw while reducing the pressure, so as to reduce the fullness and facilitate the exhaust; finally, the discharging section 70 is used for the extrusion of the material, which is composed of the discharging port 16 and the sixth double thread 12, the seventh double thread 13 and the eighth double thread 14 with decreasing pitch, the pitch decreases in turn, which can increase the pressure and promote the extrusion of the granules.

[0069] Example 2

[0070] A preparation method of a carbon fiber reinforced resin matrix composite material, which is prepared by using the double screw extrusion device for preparing the carbon fiber reinforced resin matrix composite material in Example 1, wherein the raw materials include the following mass fractions:

[0071] The chopped carbon fiber is 40wt%, the resin material (nylon 66) is 59wt%, and the dispersant is methyl cellulose (MC) 1wt%.

[0072] Specifically, the following steps are included:

[0073] (1) The initial carbon fiber is added to a beaker, and a water solution is added according to 600ml water / g carbon fiber, and then ultrasonic vibration is performed at 40℃ for 10min;

[0074] (2) The dispersant is added to step (1), stirring is performed, and ultrasonic vibration is continued for 10min, a large amount of small bubbles is generated, and the total volume mass fraction of tributyl phosphate 0.01% is added dropwise by using a rubber head dropper;

[0075] (3) The treated short carbon fibers are repeatedly diluted and filtered 3 times with 500 ml of distilled water per gram of carbon fibers in step (2), and then dried in a vacuum drying oven, with the drying temperature set to 280°C and the drying time set to 5 h, to obtain treated short carbon fibers;

[0076] (4) The resin material is dried and dehydrated at a temperature of 120°C for 6 h to obtain dried resin material;

[0077] (5) The treated short carbon fibers and the dried resin material are mixed in a proportion, and then fed into a twin-screw extrusion device from a feeding port 4 for extrusion and granulation, wherein the temperature of the extrusion device is 250°C to 300°C, the melting temperature of the material is 260°C, the inlet pressure of the extrusion device is 0.1 MPa, and the outlet is a free outlet;

[0078] (6) The granules obtained in step (5) are injected into an injection molding machine according to the ISO-527-1 standard size, with an injection molding temperature of 320°C, and then frozen in liquid nitrogen for 5 min, and then broken, and then a conductive thin layer material (platinum element) is plated on the broken surface by a gold spraying instrument, which protects the subsequent analysis experiment, and finally a carbon fiber reinforced resin matrix composite material is obtained.

[0079] The average residence time of the material in the extrusion device is 20.38 s, the maximum shear stress is 1×10 6 Pa, and the average shear stress is 2×10 5 Pa; the separation scale and concentration deviation of the material in the extrusion device (used to represent the dispersion uniformity of the composite material, the smaller the value, the more uniform the dispersion) change as shown in Figures 2-3 , wherein, Figure 2 is a separation scale diagram, Figure 3 is a concentration deviation diagram.

[0080] Example 3

[0081] A method for preparing a carbon fiber reinforced resin matrix composite material, which is different from example 2, includes the following mass fractions of raw materials:

[0082] Short carbon fibers 30wt%, resin material (nylon 66) 69wt%, and dispersant methyl cellulose (MC) 1wt%.

[0083] Example 4

[0084] A method for preparing a carbon fiber reinforced resin matrix composite material, which is different from example 2, includes the following mass fractions of raw materials:

[0085] Short carbon fibers 20wt%, resin material (nylon 66) 79wt%, and dispersant methyl cellulose (MC) 1wt%.

[0086] Example 5

[0087] A method for preparing a carbon fiber reinforced resin matrix composite material, which is different from Example 2 in that the raw materials include the following mass fractions:

[0088] Chopped carbon fibers 10wt%, resin material (nylon 66) 89wt%, dispersant methyl cellulose (MC) 1wt%.

[0089] Example 6

[0090] A method for preparing a carbon fiber reinforced resin matrix composite material, which is different from Example 2 in that the raw materials include the following mass fractions:

[0091] Chopped carbon fibers 40wt%, resin material (nylon 66) 59wt%, dispersant carboxymethyl cellulose 1wt%.

[0092] Example 7

[0093] A method for preparing a carbon fiber reinforced resin matrix composite material, which is different from Example 2 in that the raw materials include the following mass fractions:

[0094] Chopped carbon fibers 40wt%, resin material (nylon 66) 59wt%, dispersant hydroxyethyl cellulose 1wt%.

[0095] Comparative Example 1

[0096] A method for preparing a carbon fiber reinforced resin matrix composite material, which is different from Example 2 in that the raw materials are not extruded and granulated by the extrusion device in Example 1, but are extruded and granulated by an extrusion device composed of two ordinary screws with double-start threads, without engaging blocks and reverse threads, and a barrel, wherein the pitch of the double-start threads is 25mm.

[0097] Technical effects

[0098] First, Example 2 is compared with Comparative Example 1 in terms of average residence time and shear stress. The longer the average residence time of the particles, the greater the shear stress they experience, and the more uniform the dispersion and mixing of the materials. Then, the changes in separation scale and concentration deviation of the two are compared. Finally, a microcomputer-controlled electronic universal testing machine is used to perform a tensile test on the composite material after injection molding, with a tensile speed of 5mm / min.

[0099] Experimental results:

[0100] According to Example 2, the average residence time of the material in the extrusion device is 20.38s, the maximum shear stress experienced is 1x10 6 Pa, and the average shear stress is 2x10 5The average residence time of the comparative example Pa is 9.5576 s, and the maximum shear stress is 8.53 x 10 4 The average shear stress of the comparative example Pa is 2.63 x 10 4 It can be seen from the experimental results that the structure shown in Example 2 is more beneficial to the dispersion and mixing of the material.

[0101] The separation scale and concentration deviation of Example 2 are compared with the comparative example, and the comparison results are as follows Figures 4-5 As shown in the figure, Figure 4 is a comparison diagram of the separation scale, Figure 5 is a comparison diagram of the concentration deviation. The results show that the separation scale and the concentration deviation of the example are lower than those of the comparative example, which indicates that the structure of the extrusion device shown in the example is more beneficial to the dispersion and mixing of the material.

[0102] The tensile strength of Examples 2-7 is tested by an electronic universal testing machine, and the maximum tensile force borne at the time of fracture is compared, and the comparison results are as follows: the maximum tensile stress that can be borne by the material of Example 2 is 182 MPa, the maximum tensile stress that can be borne by the material of Example 3 is 193.2 MPa, the maximum tensile force that can be borne by the material of Example 4 is 167.9 MPa, the maximum tensile force that can be borne by the material of Example 5 is 100.3 MPa, the maximum tensile force that can be borne by the material of Example 6 is 186.5 MPa, and the maximum tensile force that can be borne by the material of Example 7 is 195.8 MPa.

[0103] From the experimental results, it can be seen that the content of carbon fibers has a certain influence on the performance of the composite material, and with the increase of the content of carbon fibers, the tensile strength of the composite material presents a trend of first increasing and then decreasing. Comparing Example 2 with Examples 6 and 7, the results show that the maximum tensile stress that can be borne by Example 7 is greater than that of Example 6, which is greater than that of Example 2, indicating that different dispersants can also have different dispersion effects.

[0104] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0105] The above-described examples are only descriptions of the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A method for preparing a carbon fiber reinforced resin matrix composite material, characterized in that, The preparation was carried out using a twin-screw extruder for preparing carbon fiber reinforced resin matrix composites. The twin-screw extruder includes a barrel and a screw, the screw being located inside the barrel, and further includes a feed section, a mixing section, a shearing section, a venting section, and a discharge section arranged sequentially along the screw axis. in, The screw in the mixing section includes a meshing block; The screw of the shearing section includes reverse threads; The exhaust section's barrel includes an exhaust port; The barrel of the feeding section includes a feed inlet, and the screw includes a first double-ended thread, a second double-ended thread, and a third double-ended thread with successively decreasing pitch. The number of meshing blocks is 5, and they are arranged in a rotating manner. The rotation angle is 45°, and the rotation direction is the same as the thread direction of the feed section screw. The number of reverse threads is 2, and the pitch is 15mm; The exhaust section also includes a fourth double-ended thread and a fifth double-ended thread with successively increasing pitch; The discharge section includes a discharge port in the barrel and a screw with a sixth double-ended thread, a seventh double-ended thread and an eighth double-ended thread with successively decreasing pitch. The preparation method specifically includes the following steps: (1) Immerse the carbon fiber in water, ultrasonically vibrate for 10 minutes, then add a dispersant, stir evenly and continue ultrasonically vibrating for 10 minutes, then add a defoamer, then add water to dilute, filter and dry to obtain the treated short carbon fiber; (2) The resin material is dried and dehydrated to obtain the dried resin material; (3) After mixing the treated short carbon fiber and the dried resin material, the mixture is added from the feed port to the twin-screw extruder for preparing carbon fiber reinforced resin matrix composite material for extrusion granulation, and then injection molding, freezing and brittle fracture in liquid nitrogen, and gold spraying treatment on the fracture surface are performed in sequence to obtain carbon fiber reinforced resin matrix composite material. The extrusion temperature in step (3) is 260℃-300℃, the inlet pressure is 0.1MPa, and the outlet is a free outlet; The mass ratio of the carbon fiber, dispersant and dried resin material is (10-40):1:(59-89).

2. The method for preparing a carbon fiber reinforced resin matrix composite material according to claim 1, characterized in that, The ratio of carbon fiber to water added in step (1) is 1g:600ml; the amount of defoamer added is 0.01% of the total mass of carbon fiber and water; The dispersant includes one of methylcellulose, carboxymethylcellulose, and hydroxyethylcellulose; The defoamer includes tributyl phosphate; The resin material mentioned in step (2) includes nylon 66.

3. The method for preparing a carbon fiber reinforced resin matrix composite material according to claim 1, characterized in that, The ultrasonic oscillation temperature mentioned in step (1) is 38-44℃; The drying temperature is 280-290℃, and the time is 5-6 hours; The drying temperature in step (2) is 120-130℃ and the time is 6-7h.

4. The carbon fiber reinforced resin matrix composite material prepared by the preparation method of the carbon fiber reinforced resin matrix composite material according to any one of claims 1-3.

Images