Carbon fiber fan blade material for unmanned aerial vehicles

Abstract

This invention relates to the field of unmanned aerial vehicle (UAV) component materials technology, specifically to a carbon fiber fan blade material for UAVs. The carbon fiber fan blade material is composed of the following components by weight: 60-70 parts carbon fiber, 20-30 parts modified epoxy resin, 5-10 parts nano-hydrophobic silica, and 1-3 parts antioxidant. In this invention, carbon fiber serves as the main reinforcing material, giving the fan blade high strength and good rigidity, ensuring its structural stability under high-speed rotation. The modified epoxy resin acts as a binder for the carbon fiber and, through special modification treatment, has low water absorption, effectively preventing external moisture from penetrating into the material. The nano-hydrophobic silica is uniformly dispersed in the material system, forming a microscopic hydrophobic structure on the material surface, greatly reducing the probability of moisture adhesion and absorption on the fan blade. The antioxidant is used to prevent performance degradation due to oxidation during long-term use, extending the service life of the fan blade.

Description

Technical Field

[0001] This invention relates to the field of materials technology for drone components, specifically to a carbon fiber fan blade material for drones. Background Technology

[0002] With the continuous development of drone technology, large drones are playing an increasingly important role in many fields such as logistics and transportation, and high-altitude exploration. However, most existing drone fan blade materials have the defect of strong water absorption. When drones fly in low-altitude environments with high humidity or encounter rainy weather, the fan blades easily absorb water, causing the material to expand. This not only changes the original structure and aerodynamic performance of the fan blades, reducing flight efficiency, but may also cause unbalanced rotation of the fan blades, increasing the instability of drone flight, and even causing safety hazards. Especially in high-altitude, low-temperature, and high-humidity environments, the condensation and absorption of moisture further exacerbate this problem, seriously restricting the performance and application scope of large drones. Summary of the Invention

[0003] The present invention aims to provide a novel carbon cellulose fan blade material for drones, which can effectively solve the problems of water absorption, expansion, and high-altitude water absorption in large drone fans, thereby improving the reliability and stability of drone flight.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A carbon fiber fan blade material for unmanned aerial vehicles (UAVs), the carbon fiber fan blade material being made of the following components in parts by weight: 60-70 parts carbon material, 20-30 parts modified epoxy resin, 5-10 parts nano-hydrophobic silica, and 1-3 parts antioxidant.

[0006] The antioxidant is composed of dilauryl thiodipropionate, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and dioctadecyl thiodipropionate in a mass ratio of 1:(1-2):(2-5).

[0007] As a further preferred embodiment of the present invention, the modified epoxy resin is prepared by the following method:

[0008] 1) Add epoxy resin and silane coupling agent KH-550 to a container in sequence and react at 80-83℃ for 3-5 hours. After the reaction is completed, add hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate to the reactants in sequence, and then stir continuously at 1500-2000r / min for 20-30 minutes to obtain organosilicon-based epoxy resin.

[0009] 2) At room temperature, add silane coupling agent KH-560, phenyltrimethoxysilane and dodecyltrimethoxysilane into a container, and slowly add an aqueous solution of acetic acid with a pH of 3 while stirring. Then raise the temperature to 60-65℃, add acetone and toluene, and continue the reaction for 6-8 hours. After the reaction is completed, the product is rotary evaporated for 40-60 minutes to obtain modified polysiloxane.

[0010] 3) Add the silicone-based epoxy resin and modified polysiloxane to a container, stir mechanically at room temperature until uniform, add dimer acid type polyamide curing agent, stir thoroughly, pour into a mold, degas under vacuum until no bubbles emerge, then cure for 2-3 hours and leave at room temperature for 7-10 days to obtain modified epoxy resin.

[0011] Furthermore, in step 1), the mass ratio of the epoxy resin to the silane coupling agent KH-550 is (10-13):1;

[0012] The amounts of hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate added are 4-6% and 6-8% of the reactant mass, respectively.

[0013] Furthermore, in step 2), the mass ratio of the silane coupling agent KH-560, phenyltrimethoxysilane, dodecyltrimethoxysilane, aqueous acetic acid solution, acetone, and toluene is (35.5-42.6):(23.8-34.1):(8.7-9.6):(21.6-30.2):(26.0-30.5):(41.5-46.3);

[0014] The temperature of the rotary evaporation is 70-75℃.

[0015] Furthermore, in step 3), the mass ratio of the organosilicon-based epoxy resin, modified polysiloxane, and dimer acid type polyamide curing agent is (28.5-36.2):(1.5-2.1):(14.2-15.0);

[0016] The curing temperature is 70-75℃.

[0017] As a further preferred embodiment of the present invention, the method for preparing the carbon fiber fan blade material is as follows:

[0018] 1) Weigh each component raw material according to the weight parts, pretreat the carbon fiber, and then heat the modified epoxy resin to 90-100℃ under stirring conditions to make it have good fluidity. Slowly add the pretreated carbon fiber and continue stirring for 30-60 minutes.

[0019] 2) Add nano-hydrophobic silica to the above mixture and stir for 20-30 minutes using a high-speed disperser. Finally, add antioxidant and continue stirring for 10-20 minutes. After mixing evenly, inject the material into a mold and use a vacuum-assisted molding process. After curing, carbon cellulose fan blade material can be obtained.

[0020] Furthermore, the stirring speed is 100-180 r / min;

[0021] The high-speed disperser operates at a speed of 1000-1500 rpm.

[0022] As a further preferred embodiment of the present invention, the specific operations for pretreating the carbon fiber are as follows:

[0023] 1) Clean the carbon fiber with ethanol using ultrasonic cleaning for 20-30 minutes, then soak it in concentrated nitric acid, heat it to 70-80℃, and stir continuously for 2-3 hours. After the treatment is completed, rinse it repeatedly with deionized water until neutral, and dry it in an oven at 80-100℃ for 3-5 hours to obtain acidified carbon fiber.

[0024] 2) Dissolve nickel nitrate, cobalt nitrate and urea in deionized water and stir thoroughly to form a precursor solution. Then, uniformly disperse acidified carbon fiber into the above precursor solution, add toluene and transfer to a reaction vessel. After hydrothermal reaction for 16-20 hours, anneal in air for 3-5 hours.

[0025] Furthermore, in step 1), the concentration of the concentrated nitric acid is 68-72 wt%.

[0026] The stirring speed is 150-200 r / min.

[0027] Furthermore, in step 2), the ratio of nickel nitrate, cobalt nitrate, urea, deionized water, acidified carbon fiber, and toluene is (3-5)g:(6-10)g:(7-12)g:(60-100)mL:(2-4)g:(200-300)mL;

[0028] The temperature of the hydrothermal reaction is 110-116℃;

[0029] The annealing temperature is 350-370℃.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] In this invention, hydroxyl-terminated polydimethylsiloxane is used to treat epoxy resin to obtain organosilicon-based epoxy resin. Introducing organosilicon groups effectively reduces the surface energy of the epoxy resin and improves its hydrophobicity. Simultaneously, the introduced flexible structure of the siloxane gives the epoxy resin a more dense structure, thus enhancing its impact resistance. Furthermore, a dodecyl-containing modified polysiloxane is prepared through hydrolysis and condensation, introducing epoxy groups to improve the compatibility between the modified polysiloxane and the epoxy resin. The introduction of dodecyl groups enhances the toughening effect and hydrophobicity, resulting in a modified epoxy resin with excellent hydrophobicity and toughness. It exhibits excellent properties and strong impact resistance. By melting modified epoxy resin and thoroughly mixing it with carbon fiber, the modified epoxy resin adheres to the carbon fiber. Through special modification treatment, it possesses excellent hydrophobicity, forming a hydrophobic network within the fan blade material. This effectively prevents external moisture from penetrating into the material. Furthermore, nano-hydrophobic silica is uniformly dispersed throughout the material system, forming a microscopic hydrophobic structure on the material surface. When water droplets contact the fan blade surface, they quickly roll off due to surface tension, significantly reducing the likelihood of moisture adhesion and absorption on the fan blade. By constructing an internal and external hydrophobic structure, it greatly enhances the... To improve waterproofing, and to enhance the interfacial strength between the modified epoxy resin and carbon fiber, the carbon fiber is pretreated using concentrated nitric acid. This acid treatment etches the carbon fiber surface, creating a microporous structure and increasing surface roughness. Then, using the acidified carbon fiber as the matrix material, a nickel-cobalt-based precursor is grown on it via a hydrothermal method, followed by annealing to remove the template, resulting in the deposition of nanowires. These nanowires extend into the modified epoxy resin matrix, increasing the crosslinking density and improving the structural compactness, thereby enhancing the strength of the modified epoxy resin. Meanwhile, the nanowires extending into the modified epoxy resin can play a good connecting role, enhancing the interfacial strength between the pretreated carbon fiber and the modified epoxy resin, and improving the adhesion of the modified epoxy resin to the pretreated carbon fiber. By combining the two, it can not only serve as the main reinforcing material, but also form a mesh support structure through mutual cross-linking, giving the fan blade high strength and good rigidity, ensuring its structural stability under high-speed rotation. At the same time, the hydrophobicity of the modified epoxy resin gives the mesh support structure a good water-proof effect, which can effectively prevent external moisture from penetrating into the material, making the fan blade material have a very low water absorption rate.

[0032] In this invention, carbon fiber serves as the main reinforcing material, endowing the fan blades with high strength and good rigidity, ensuring their structural stability under high-speed rotation. Modified epoxy resin serves two purposes: firstly, it binds the carbon fiber; secondly, it undergoes special modification treatment, resulting in low water absorption, effectively preventing external moisture from penetrating into the material. Nano-hydrophobic silica is uniformly dispersed in the material system, forming a micro-hydrophobic structure on the material surface. When water droplets come into contact with the fan blade surface, they quickly roll off due to surface tension, greatly reducing the probability of moisture adhesion and absorption on the fan blades. Antioxidants are used to prevent the material from deteriorating due to oxidation during long-term use, extending the service life of the fan blades. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. 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.

[0034] In this embodiment of the invention, the antioxidant is composed of dilauryl thiodipropionate, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and dioctadecyl thiodipropionate in a mass ratio of 1:2:5.

[0035] Example 1

[0036] A carbon fiber fan blade material for drones, comprising the following components by weight: 60 parts carbon material, 20 parts modified epoxy resin, 5 parts nano-hydrophobic silica, and 1 part antioxidant.

[0037] The preparation method of this carbon fiber fan blade material is as follows:

[0038] 1) Weigh each component raw material according to the weight parts, pretreat the carbon fiber, and then heat the modified epoxy resin to 90°C under stirring at 100r / min to make it have good fluidity. Slowly add the pretreated carbon fiber and continue stirring for 30min.

[0039] 2) Add nano-hydrophobic silica to the above mixture, stir at 1000 rpm for 20 minutes using a high-speed disperser, add antioxidant, continue stirring for 10 minutes, and after mixing evenly, inject the material into the mold, use vacuum-assisted molding process, and solidify to form carbon cellulose fan blade material.

[0040] The specific pretreatment procedures for carbon fibers are as follows:

[0041] 1) The carbon fiber was ultrasonically cleaned with ethanol for 20 min, then immersed in concentrated nitric acid with a concentration of 60 wt%, heated to 70 ℃, and continuously stirred at 150 r / min for 2 h. After the treatment was completed, it was repeatedly rinsed with deionized water until neutral, and dried in an oven at 80 ℃ for 3 h to obtain acidified carbon fiber.

[0042] 2) Dissolve 3g nickel nitrate, 6g cobalt nitrate and 7g urea in 60mL deionized water and stir thoroughly to form a precursor solution. Then, uniformly disperse 2g acidified carbon fiber into the above precursor solution, add 200mL toluene and transfer to a reaction vessel. React hydrothermally at 110℃ for 16h, and then anneal at 350℃ for 3h in air atmosphere.

[0043] The preparation method of the modified epoxy resin is as follows:

[0044] 1) Epoxy resin and silane coupling agent KH-550 were added to a container in a mass ratio of 10:1 and reacted at 80°C for 3 hours. After the reaction was completed, hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate were added to the reactants in sequence, with the addition amounts being 4% and 6% of the reactant mass, respectively. The mixture was then stirred continuously at 1500 r / min for 20 minutes to obtain organosilicon-based epoxy resin.

[0045] 2) At room temperature, 35.5g of silane coupling agent KH-560, 23.8g of phenyltrimethoxysilane and 8.7g of dodecyltrimethoxysilane were added to a container. While stirring, 21.6g of acetic acid aqueous solution with a pH of 3 was slowly added dropwise. Then the temperature was raised to 60℃, and 26.0g of acetone and 41.5g of toluene were added. The reaction was continued for 6h. After the reaction was completed, the product was rotary evaporated at 70℃ for 40min to obtain modified polysiloxane.

[0046] 3) Add 28.5g of silicone-based epoxy resin and 1.5g of modified polysiloxane to a container, stir mechanically at room temperature until homogeneous, add 14.2g of dimer acid type polyamide curing agent, stir thoroughly, pour into a mold, degas under vacuum until no bubbles emerge, then cure at 70℃ for 2 hours, and leave at room temperature for 7 days to obtain modified epoxy resin.

[0047] Example 2

[0048] A carbon fiber fan blade material for drones, comprising the following components by weight: 65 parts carbon material, 25 parts modified epoxy resin, 7 parts nano-hydrophobic silica, and 2 parts antioxidant.

[0049] The preparation method of this carbon fiber fan blade material is as follows:

[0050] 1) Weigh each component raw material according to the weight parts, pretreat the carbon fiber, and then heat the modified epoxy resin to 95°C under stirring at 150r / min to make it have good fluidity. Slowly add the pretreated carbon fiber and continue stirring for 50min.

[0051] 2) Add nano-hydrophobic silica to the above mixture, stir at 1300 rpm for 25 minutes using a high-speed disperser, add antioxidant, continue stirring for 15 minutes, and after mixing evenly, inject the material into the mold, use vacuum-assisted molding process, and solidify to form carbon cellulose fan blade material.

[0052] The specific pretreatment procedures for carbon fibers are as follows:

[0053] 1) The carbon fiber was ultrasonically cleaned with ethanol for 25 min, then immersed in concentrated nitric acid with a concentration of 65 wt%, heated to 75 ℃, and continuously stirred at 180 r / min for 2.5 h. After the treatment was completed, it was repeatedly rinsed with deionized water until neutral, and dried in an oven at 90 ℃ for 4 h to obtain acidified carbon fiber.

[0054] 2) Dissolve 4g nickel nitrate, 8g cobalt nitrate and 10g urea in 80mL deionized water and stir thoroughly to form a precursor solution. Then, uniformly disperse 3g acidified carbon fiber into the above precursor solution, add 250mL toluene and transfer to a reaction vessel. Perform hydrothermal reaction at 115℃ for 18h, and then anneal at 360℃ for 4h in air atmosphere.

[0055] The preparation method of the modified epoxy resin is as follows:

[0056] 1) Epoxy resin and silane coupling agent KH-550 were added to a container in a mass ratio of 12:1 and reacted at 82°C for 4 hours. After the reaction was completed, hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate were added to the reactants in sequence, with the addition amounts being 5% and 7% of the reactant mass, respectively. The mixture was then stirred continuously at 1800 r / min for 25 minutes to obtain organosilicon-based epoxy resin.

[0057] 2) At room temperature, 38.5g of silane coupling agent KH-560, 28.3g of phenyltrimethoxysilane and 9.2g of dodecyltrimethoxysilane were added to a container. While stirring, 26.3g of an aqueous acetic acid solution with a pH of 3 was slowly added dropwise. Then the temperature was raised to 62℃, and 28.5g of acetone and 43.6g of toluene were added. The reaction was continued for 7h. After the reaction was completed, the product was rotary evaporated at 72℃ for 50min to obtain modified polysiloxane.

[0058] 3) Add 32.0g of silicone-based epoxy resin and 1.8g of modified polysiloxane to a container, stir mechanically at room temperature until homogeneous, add 14.7g of dimer acid type polyamide curing agent, stir thoroughly, pour into a mold, degas under vacuum until no bubbles emerge, then cure at 72℃ for 2.5h, and leave at room temperature for 8d to obtain modified epoxy resin.

[0059] Example 3

[0060] A carbon fiber fan blade material for drones, comprising the following components by weight: 70 parts carbon material, 30 parts modified epoxy resin, 10 parts nano-hydrophobic silica, and 3 parts antioxidant.

[0061] The preparation method of this carbon fiber fan blade material is as follows:

[0062] 1) Weigh each component raw material according to the weight parts, pretreat the carbon fiber, and then heat the modified epoxy resin to 100°C under stirring at 180r / min to make it have good fluidity. Slowly add the pretreated carbon fiber and continue stirring for 60min.

[0063] 2) Add nano-hydrophobic silica to the above mixture, stir at 1500 rpm for 30 minutes using a high-speed disperser, add antioxidant, continue stirring for 20 minutes, and after mixing evenly, inject the material into the mold, use vacuum-assisted molding process, and solidify to form carbon cellulose fan blade material.

[0064] The specific pretreatment procedures for carbon fibers are as follows:

[0065] 1) The carbon fiber was ultrasonically cleaned with ethanol for 30 min, then immersed in concentrated nitric acid with a concentration of 70 wt%, heated to 80 ℃, and continuously stirred at 200 r / min for 3 h. After the treatment was completed, it was repeatedly rinsed with deionized water until neutral, and dried in an oven at 100 ℃ for 5 h to obtain acidified carbon fiber.

[0066] 2) Dissolve 5g nickel nitrate, 10g cobalt nitrate and 12g urea in 100mL deionized water and stir thoroughly to form a precursor solution. Then, uniformly disperse 4g acidified carbon fiber into the above precursor solution, add 300mL toluene and transfer to a reaction vessel. Perform hydrothermal reaction at 116℃ for 20h, and then anneal at 370℃ for 5h in air atmosphere.

[0067] The preparation method of the modified epoxy resin is as follows:

[0068] 1) Epoxy resin and silane coupling agent KH-550 were added to a container in a mass ratio of 13:1 and reacted at 83°C for 5 hours. After the reaction was completed, hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate were added to the reactants in sequence, with the addition amounts being 6% and 8% of the reactant mass, respectively. The mixture was then stirred continuously at 2000 r / min for 30 minutes to obtain organosilicon-based epoxy resin.

[0069] 2) At room temperature, 42.6g of silane coupling agent KH-560, 34.1g of phenyltrimethoxysilane and 9.6g of dodecyltrimethoxysilane were added to a container. While stirring, 30.2g of acetic acid aqueous solution with a pH of 3 was slowly added dropwise. Then the temperature was raised to 65℃, and 30.5g of acetone and 46.3g of toluene were added. The reaction was continued for 8 hours. After the reaction was completed, the product was rotary evaporated at 75℃ for 60 minutes to obtain modified polysiloxane.

[0070] 3) Add 36.2g of silicone-based epoxy resin and 2.1g of modified polysiloxane to a container, stir mechanically at room temperature until uniform, add 15.0g of dimer acid type polyamide curing agent, stir thoroughly, pour into a mold, degas under vacuum until no bubbles emerge, then cure at 75℃ for 3 hours, and leave at room temperature for 10 days to obtain modified epoxy resin.

[0071] Comparative Example 1: This comparative example is basically the same as Example 1, except that the carbon fiber was not pretreated.

[0072] Comparative Example 2: This comparative example is basically the same as Example 1, except that step 1 is omitted in the pretreatment of carbon fiber.

[0073] Comparative Example 3: This comparative example is basically the same as Example 1, except that step 2 is omitted in the pretreatment of carbon fiber.

[0074] Comparative Example 4: This comparative example is basically the same as Example 1, except that step 1 is omitted in the preparation of the modified epoxy resin.

[0075] Comparative Example 5: This comparative example is basically the same as Example 1, except that steps 2)-3) are omitted in the preparation of the modified epoxy resin.

[0076] Test experiment:

[0077] Carbon fiber fan blade material samples were prepared according to the methods provided in Examples 1-3 and Comparative Examples 1-5. The weight Mo of the samples was measured, and then the samples were placed in clean water at a temperature of 20°C, with the upper surface of the samples immersed in the water by 2-3 mm. The samples were supported by 10 mm steel bars to ensure the water absorption area of ​​the samples. Timing was started when the samples were placed in the water. After soaking for 24 hours, the weight Mn was measured, and then the water absorption rate of the samples was calculated using the following formula:

[0078]

[0079] The calculation results are shown in Table 1.

[0080] Table 1

[0081] Water absorption rate % 0.23 0.21 0.26 0.88 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Water absorption rate % 0.71 0.77 0.63 0.72

[0082] As shown in Table 1, the carbon fiber fan blade material of this invention has a very low water absorption rate. When flying in a humid low-altitude environment, the fan blade will not absorb water and expand, resulting in good flight stability.

[0083] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A drone carbon fiber fan blade material, characterized by, The carbon fiber fan blade material is made of the following components by weight: 60-70 parts carbon material, 20-30 parts modified epoxy resin, 5-10 parts nano-hydrophobic silica, and 1-3 parts antioxidant. The antioxidant is composed of dilauryl thiodipropionate, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], and dioctadecyl thiodipropionate in a mass ratio of 1:(1-2):(2-5). The carbon material is carbon fiber; The modified epoxy resin is prepared as follows: 1) Add epoxy resin and silane coupling agent KH-550 to a container in sequence and react at 80-83℃ for 3-5 hours. After the reaction is completed, add hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate to the reactants in sequence, and then stir continuously at 1500-2000r / min for 20-30 minutes to obtain organosilicon-based epoxy resin. 2) At room temperature, add silane coupling agent KH-560, phenyltrimethoxysilane and dodecyltrimethoxysilane into a container, and slowly add an aqueous solution of acetic acid with a pH of 3 while stirring. Then raise the temperature to 60-65℃, add acetone and toluene, and continue the reaction for 6-8 hours. After the reaction is completed, the product is rotary evaporated for 40-60 minutes to obtain modified polysiloxane. 3) Add the silicone-based epoxy resin and modified polysiloxane to a container, stir mechanically at room temperature until uniform, add dimer acid type polyamide curing agent, stir thoroughly, pour into a mold, degas under vacuum until no bubbles emerge, then cure for 2-3 hours and place at room temperature for 7-10 days to obtain modified epoxy resin. The carbon fiber is pretreated as follows: 1) Clean the carbon fiber with ethanol using ultrasonic cleaning for 20-30 minutes, then soak it in concentrated nitric acid, heat it to 70-80℃, and stir continuously for 2-3 hours. After the treatment is completed, rinse it repeatedly with deionized water until neutral, and dry it in an oven at 80-100℃ for 3-5 hours to obtain acidified carbon fiber. 2) Dissolve nickel nitrate, cobalt nitrate and urea in deionized water and stir thoroughly to form a precursor solution. Then, uniformly disperse acidified carbon fiber into the above precursor solution, add toluene and transfer to a reaction vessel. After hydrothermal reaction for 16-20 hours, anneal in air for 3-5 hours.

2. The carbon fiber fan blade material for unmanned aerial vehicles according to claim 1, characterized in that, In step 1), the mass ratio of the epoxy resin to the silane coupling agent KH-550 is (10-13):1; The amounts of hydroxyl-terminated polydimethylsiloxane and dibutyltin dilaurate added are 4-6% and 6-8% of the reactant mass, respectively.

3. The carbon fiber fan blade material for unmanned aerial vehicles according to claim 1, characterized in that, In step 2), the mass ratio of the silane coupling agent KH-560, phenyltrimethoxysilane, dodecyltrimethoxysilane, aqueous acetic acid solution, acetone, and toluene is (35.5-42.6):(23.8-34.1):(8.7-9.6):(21.6-30.2):(26.0-30.5):(41.5-46.3). The temperature of the rotary evaporation is 70-75℃.

4. The carbon fiber fan blade material for unmanned aerial vehicles according to claim 1, characterized in that, In step 3), the mass ratio of the organosilicon-based epoxy resin, modified polysiloxane, and dimer acid type polyamide curing agent is (28.5-36.2):(1.5-2.1):(14.2-15.0). The curing temperature is 70-75℃.

5. A carbon fiber fan blade material for unmanned aerial vehicles according to any one of claims 1-4, characterized in that, The preparation method of the carbon fiber fan blade material is as follows: 1) Weigh each component raw material according to the weight parts, pretreat the carbon fiber, and then heat the modified epoxy resin to 90-100℃ under stirring conditions to make it have good fluidity. Slowly add the pretreated carbon fiber and continue stirring for 30-60 minutes. 2) Add nano-hydrophobic silica to the above mixture and stir for 20-30 minutes using a high-speed disperser. Finally, add antioxidant and continue stirring for 10-20 minutes. After mixing evenly, inject the material into a mold and use a vacuum-assisted molding process. After curing, carbon cellulose fan blade material can be obtained.

6. The carbon fiber fan blade material for unmanned aerial vehicles according to claim 5, characterized in that, The stirring speed is 100-180 r / min; The high-speed disperser operates at a speed of 1000-1500 rpm.

7. The carbon fiber fan blade material for unmanned aerial vehicles according to claim 1, characterized in that, In step 1), the concentration of the concentrated nitric acid is 68-72 wt%. The stirring speed is 150-200 r / min.

8. The carbon fiber fan blade material for unmanned aerial vehicles according to claim 1, characterized in that, In step 2), the ratio of nickel nitrate, cobalt nitrate, urea, deionized water, acidified carbon fiber, and toluene is (3-5) g: (6-10) g: (7-12) g: (60-100) mL: (2-4) g: (200-300) mL; The temperature of the hydrothermal reaction is 110-116℃; The annealing temperature is 350-370℃.

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