Composite material for manufacturing fan blade and preparation method thereof

Abstract

The invention discloses a composite material for manufacturing a fan blade and a preparation method of the composite material. The composite material is prepared from the following raw materials in parts by weight: 60 to 70 parts of acrylonitrile-styrene copolymer, 2 to 5 parts of acrylonitrile-butadiene-styrene copolymer, 25 to 35 parts of glass fiber, 0.1 to 0.5 part of coupling agent and 0.01 to 0.1 part of lubricant. According to the present invention, the molar ratio and the use amount of the monomers in the AS resin and the ABS resin are specifically adjusted, such that the compounding of the matrix resin and the glass fiber is well achieved, and the problems of poor fluidity, poor demolding property and poor surface smoothness of the composite material caused by the addition of the large amount of the glass fiber can be significantly improved only by adding the small amount of the ABS resin; meanwhile, the glass fibers with specific sizes are selected in a targeted manner, so that the glass fibers are dispersed more uniformly in the resin, the compounding effect of the glass fibers and the matrix resin is further improved, the corresponding performance of the composite material is improved, and large-scale production and application of the fan blade are facilitated.

Description

Technical Field

[0001] The present invention relates to the field of polymer materials, specifically to the field of composite material technology, and in particular to a composite material for manufacturing fan blades and a preparation method thereof. Background Art

[0002] Plastic fan blades are widely used in household appliances (such as fans, air conditioners), ventilation systems, car radiators, aircraft propellers and other fields; especially in household appliances, plastic fan blades are favored because of their lightness, safety and durability. In order to further improve the strength and rigidity of the fan blades, thermoplastic polymer materials (such as polypropylene (PP), polyethylene (PE), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), acrylonitrile-styrene copolymer (AS) and nylon (PA)) are usually used as the base material of plastic fan blades; these thermoplastic polymer materials have good mechanical strength, impact resistance, wear resistance and chemical stability, thus giving the fan blades excellent basic performance. At the same time, according to the different application scenarios of the fan blades, you can also choose to add reinforcing materials such as glass fiber and carbon fiber to mix with the base material, and the ratio of raw materials can be adjusted according to actual performance requirements to meet different performance requirements.

[0003] Acrylonitrile-styrene copolymer (SAN), also known as AS resin, is a thermoplastic resin made by the copolymerization of acrylonitrile and styrene monomers. It appears as transparent or translucent water-white particles. Fan blades made of AS as the base resin have the following advantages: 1. High strength and hardness. SAN has high strength and hardness, which makes the fan blades made of SAN have good durability and deformation resistance; 2. Good processability. SAN has good processability and can be formed by injection molding, extrusion and other methods. It is suitable for manufacturing parts with complex shapes such as fan blades; 3. Chemical resistance. SAN can resist the erosion of various solvents and chemicals, which makes the fan blades maintain stable performance in various environments; 4. Low water absorption and electrical insulation. SAN has low water absorption and good electrical insulation, which is beneficial for the application of fan blades in humid or electrical environments; 5. Transparency and gloss. SAN has good transparency and gloss, which makes the fan blades more visually beautiful; Therefore, AS resin has become one of the main base resins for manufacturing fan blades.

[0004] However, during the experiment and application process, it was found that although the fan blades made of AS resin have many advantages, they also have problems such as poor heat resistance and weather resistance and low toughness. For this reason, people have improved its heat resistance, weather resistance and toughness by compounding glass fiber into AS resin, with significant results. But at the same time, the addition of glass fiber and the unreasonable ratio also led to a significant decrease in the processability of the compounded AS resin (reduced fluidity and demolding properties), and the surface finish and smoothness of the product deteriorated, which is not conducive to the large-scale production of fan blades, and affects the aesthetics of the product, seriously affecting the use and sales of the product. Summary of the invention

[0006] The purpose of the present invention is to overcome the problems of significantly reduced processability and deteriorated surface finish and smoothness of the product in the existing glass fiber modified AS resin materials, and propose a composite material for manufacturing fan blades and a preparation method thereof.

[0007] In order to achieve the above-mentioned invention object, the present invention provides a composite material for manufacturing fan blades, which is prepared by the following raw materials in parts by weight: 60-70 parts of acrylonitrile-styrene copolymer (AS resin), 2-5 parts of acrylonitrile-butadiene-styrene copolymer (ABS), 25-35 parts of glass fiber, 0.1-0.5 parts of coupling agent, and 0.01-0.1 parts of lubricant; Wherein, in the acrylonitrile-styrene copolymer, the molar ratio of polymer monomers acrylonitrile and styrene is 0.8-1.5:1; In the acrylonitrile-butadiene-styrene copolymer, the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 0.8-1.0:0.6-0.8:1; The glass fiber has a diameter of 10-15 μm and a length of 2-5 mm.

[0008] The present invention discloses a composite material for manufacturing fan blades. The molar ratio and dosage of monomers in AS resin and ABS resin are adjusted in a targeted manner so that the AS resin and ABS resin can form a synergistic solubilization effect. While improving the compatibility between the matrix resin and the glass fiber, the problem of "precipitation" of the glass fiber on the surface of the fan blade due to the internal stress during injection molding can be reduced, thereby better realizing the composite of the matrix resin and the glass fiber. Only a small amount of ABS resin needs to be added to significantly improve the problem of poor fluidity, demoulding property and surface finish of the composite material caused by the large amount of glass fiber added. At the same time, glass fibers of specific sizes are selected in a targeted manner so that the glass fibers are more evenly dispersed in the resin, thereby further improving the composite effect of the glass fiber and the matrix resin, improving the corresponding performance of the composite material, and facilitating the large-scale production and application of fan blades.

[0009] Preferably, in the acrylonitrile-styrene copolymer, the molar ratio of polymer monomers acrylonitrile and styrene is 1:1; in the acrylonitrile-butadiene-styrene copolymer, the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 1:0.8:1; the preferred copolymer monomer molar ratio, AS and ABS can better form a synergistic solubilization effect, so that they can be better composited with glass fibers, and the problems of poor fluidity, demoulding properties and surface finish of the composite material caused by the large amount of glass fibers added are improved to the greatest extent, and the processability of the composite material and the appearance of the product are improved without increasing the cost and affecting the mechanical properties.

[0010] Preferably, the glass fiber has a diameter of 12-13 μm and a length of 2-3 mm; the smaller the diameter and length of the glass fiber, the worse the dispersibility, which will reduce the fluidity, mechanical properties and smoothness of the composite material; the larger the diameter and length of the glass fiber, the worse the compatibility with AS, which will also significantly reduce the fluidity, mechanical properties and smoothness of the composite material.

[0011] Preferably, the degree of polymerization of the acrylonitrile-styrene copolymer is 800-1200; the degree of polymerization of AS directly affects the fluidity and physicochemical properties of the AS resin. If the degree of polymerization is too large, the molecular weight of AS is too large, the fluidity becomes poor, and the processability decreases. If the degree of polymerization is too small, the molecular weight of AS is too small, and the mechanical properties decrease. When the degree of polymerization is 800-1200, the AS resin has excellent processability and the mechanical properties also meet the requirements of manufacturing fan blades.

[0012] Preferably, the polymerization degree of the acrylonitrile-butadiene-styrene copolymer is 4000-5000; when the polymerization degree is 4000-5000, adding a small amount of ABS resin can significantly improve the mechanical properties, demoulding properties and surface finish of the composite material, and at the same time, it will not significantly reduce the fluidity of the composite material, thereby affecting the processing performance.

[0013] Preferably, the lubricant is vinyl bisstearamide (EBS). The preferred lubricant has better lubrication effect and is beneficial to improving the demoulding effect and the surface smoothness of the product.

[0014] Preferably, the coupling agent is a silane coupling agent; more preferably, the coupling agent is N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane (DB-792); the preferred coupling agent has better coupling effect and obtains better performance of the material.

[0015] Preferably, the composite material is prepared from the following raw materials in parts by weight: 65 parts of acrylonitrile-styrene copolymer, 3.5 parts of acrylonitrile-butadiene-styrene copolymer, 30 parts of glass fiber, 0.25 parts of coupling agent, and 0.05 parts of lubricant.

[0016] In order to achieve the above-mentioned object of the invention, the present invention further provides a method for preparing a composite material for manufacturing a fan blade, comprising the following steps: S1, premixing AS resin, ABS, glass fiber and coupling agent at high speed to obtain a premix; S2, adding a lubricant to the premix and mixing at a low speed to obtain a mixture; S3. Compounding the mixed material using a twin-screw extruder to obtain a composite material for manufacturing fan blades.

[0017] Among them, preferably, in step S1, the speed of the high-speed premixing treatment is 200-300r / min, the premixing time is 25-30min, and the temperature is 50-70°C; the preferred premixing speed, time and temperature can make the reaction effect of the glass fiber and the coupling agent better, which is beneficial to improving the performance of the composite material.

[0018] Preferably, in step S2, the speed of low-speed mixing is 80-120 r / min.

[0019] Wherein, in step S3, preferably, the screw and die temperature of the twin-screw extruder are 120-130°C.

[0020] Compared with the prior art, the present invention has the following beneficial effects: 1. The composite material for manufacturing fan blades of the present invention can form a synergistic solubilization effect by specifically adjusting the molar ratio and dosage of monomers in AS resin and ABS resin, thereby improving the compatibility between the matrix resin and the glass fiber and reducing the problem of "precipitation" of the glass fiber on the surface of the fan blade due to internal stress during injection molding, thereby better realizing the composite of the matrix resin and the glass fiber. Only a small amount of ABS resin needs to be added to significantly improve the problems of poor fluidity, demoulding properties and surface finish of the composite material caused by the large amount of glass fiber added.

[0021] 2. The present invention is used to manufacture a composite material for fan blades, and specifically selects glass fibers of specific sizes to make the glass fibers more evenly dispersed in the resin, thereby further improving the composite effect of the glass fibers and the matrix resin, improving the corresponding performance of the composite material, and facilitating the large-scale production and application of fan blades.

[0022] 3. The preparation method of the composite material of the present invention has simple process, controllable performance and good stability, and is suitable for large-scale production of composite materials for manufacturing fan blades. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with test examples and specific implementation methods. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0024] Example 1 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method comprises the following steps: S1, premixing AS resin, ABS, glass fiber and coupling agent at high speed (250r / min, 25min, 60°C) to obtain a premix; S2, adding lubricant to the premix, mixing at a low speed (100 r / min) to obtain a mixture; S3. Compounding the mixed material using a twin-screw extruder (the screw and die head are set at 125° C.) to obtain a composite material.

[0025] Example 2 A composite material is prepared by including the following raw materials in parts by weight: 60 parts of AS resin, 5 parts of ABS, 35 parts of glass fiber, 0.5 parts of coupling agent (DB-792), and 0.01 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0026] Example 3 A composite material is prepared by including the following raw materials in parts by weight: 70 parts of AS resin, 2 parts of ABS, 25 parts of glass fiber, 0.1 parts of coupling agent (DB-792), and 0.1 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0027] Example 4 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1.5:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 0.8:0.6:1; The glass fiber has a diameter of 10 μm and a length of 5 mm; The preparation method is the same as that in Example 1.

[0028] Example 5 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 0.8:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 1:0.8:1; The glass fiber has a diameter of 15 μm and a length of 2 mm; The preparation method is the same as that in Example 1.

[0029] Example 6 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 400-800, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 3000-4000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0030] Example 7 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 1200-1500, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 5000-6000, and the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0031] Comparative Example 1 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 8 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0032] Comparative Example 2 A composite material is prepared by including the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 40 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0033] Comparative Example 3 A composite material is prepared by including the following raw materials in parts by weight: 68.5 parts of AS resin, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0034] Comparative Example 4 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1.8:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0035] Comparative Example 5 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 0.6:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0036] Comparative Example 6 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.5:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0037] Comparative Example 7 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 0.6:0.8:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0038] Comparative Example 8 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The glass fiber has a diameter of 12 μm and a length of 1 mm; The preparation method is the same as that in Example 1.

[0039] Comparative Example 9 A composite material is prepared by the following raw materials in parts by weight: 65 parts of AS resin, 3.5 parts of ABS, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The polymerization degree of acrylonitrile-butadiene-styrene copolymer is 4000-5000, and the molar ratio of acrylonitrile, butadiene and styrene in the polymer monomers is 1:0.8:1; The glass fiber has a diameter of 18 μm and a length of 3 mm; The preparation method is the same as that in Example 1.

[0040] Blank example: A composite material is prepared by including the following raw materials in parts by weight: 65 parts of AS resin, 30 parts of glass fiber, 0.25 parts of coupling agent (DB-792), and 0.05 parts of lubricant (EBS); Wherein, the polymerization degree of acrylonitrile-styrene copolymer is 800-1200, and the molar ratio of acrylonitrile and styrene in the polymer monomer is 1:1; The diameter of the glass fiber is 12 μm and the length is 3 mm; The preparation method is the same as that in Example 1.

[0041] Experimental example: The composite materials prepared in Examples 1-7, Comparative Examples 1-9 and the blank examples were tested for notched impact strength (GB / T1043.1-2008), tensile strength (GBT 1040.1-2006), torsional stiffness (GB / T 41936.2-2022), melt quality fluidity (GB T 3682.1-2018; 120°C, 2.16kg), surface roughness (GB / T 14234-1993), demolding pressure (the pressure on the ejector rod of the injection molding machine when the middle wind wheel specimen is demolded; the diameter of the middle wind wheel is 12 cm and the length is 7.26 cm; during injection molding, the cooling time is 9.8s), and the results are as follows:

[0042] Analysis of the above experimental results shows that the composite material in the embodiment of the present invention can form a synergistic solubilization effect between the AS resin and the ABS resin by specifically adjusting the molar ratio, dosage and degree of polymerization of the monomers in the AS resin and the ABS resin. While improving the compatibility between the matrix resin and the glass fiber, it can reduce the problem of "precipitation" of the glass fiber on the surface of the fan blade due to internal stress during injection molding, thereby better realizing the composite of the matrix resin and the glass fiber. Only a small amount of ABS resin needs to be added to significantly improve the problem of poor fluidity, demoulding properties and surface finish of the composite material caused by the large amount of glass fiber added; and the selection of glass fibers of specific sizes can also better disperse the glass fibers in the resin, thereby further improving the composite effect of the glass fibers and the matrix resin, and improving the corresponding performance of the composite material.

Claims

1. A composite material for manufacturing fan blades, characterized in that: The invention is prepared by the following raw materials in parts by weight: 60-70 parts of acrylonitrile-styrene copolymer, 2-5 parts of acrylonitrile-butadiene-styrene copolymer, 25-35 parts of glass fiber, 0.1-0.5 parts of coupling agent, and 0.01-0.1 parts of lubricant; In the acrylonitrile-styrene copolymer, the molar ratio of polymer monomers acrylonitrile and styrene is 0.8-1.5:1; In the acrylonitrile-butadiene-styrene copolymer, the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 0.8-1.0:0.6-0.8:1; The glass fiber has a diameter of 10-15 μm and a length of 2-5 mm.

2. The composite material according to claim 1, characterized in that: In the acrylonitrile-styrene copolymer, the molar ratio of polymer monomers acrylonitrile and styrene is 1:1; in the acrylonitrile-butadiene-styrene copolymer, the molar ratio of polymer monomers acrylonitrile, butadiene and styrene is 1:0.8:

1.

3. The composite material according to claim 1, characterized in that: The glass fiber has a diameter of 12-13 μm and a length of 2-3 mm.

4. The composite material according to claim 1, characterized in that: The polymerization degree of the acrylonitrile-styrene copolymer is 800-1200.

5. The composite material according to claim 1, characterized in that: The polymerization degree of the acrylonitrile-butadiene-styrene copolymer is 4000-5000.

6. The composite material according to claim 1, characterized in that: The lubricant is vinyl bisstearamide (EBS).

7. The composite material according to claim 1, characterized in that: The coupling agent is a silane coupling agent.

8. The composite material according to claim 7, characterized in that: The coupling agent is N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

9. A method for preparing the composite material according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, premixing acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, glass fiber and coupling agent at high speed to obtain a premix; S2, adding a lubricant to the premix and mixing at a low speed to obtain a mixture; S3. Compounding the mixed material using a twin-screw extruder to obtain a composite material for manufacturing fan blades.

10. The method for preparing the composite material according to claim 9, characterized in that: In step S1, the speed of the high-speed premixing process is 200-300 r / min, the premixing time is 25-30 min, and the temperature is 50-70°C.

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