Basalt continuous fiber reinforced anti-fatigue wind power blade material and preparation method thereof

Abstract

The invention relates to the technical field of wind power material preparation, and particularly discloses a basalt continuous fiber reinforced anti-fatigue wind power blade material and a preparation method thereof, the basalt continuous fiber reinforced anti-fatigue wind power blade material comprises the following components by mass percentage: 45%-60% of basalt continuous fiber, 35%-50% of a modified epoxy resin matrix, 1%-3% of a curing agent and 1%-5% of an interface reinforcing agent; according to the preparation method disclosed by the invention, a dual surface modification technology of low-temperature plasma activation and silane coupling agent impregnation is adopted, so that active groups on the surface of the basalt fiber are greatly increased, and a firmer chemical bond and a physical embedded structure are formed between the fiber and the modified epoxy resin; the reinforced interface bonding significantly improves the transmission efficiency of a load between the fiber and a matrix, further improves the anti-fatigue performance and the overall structure stability of the composite material, and through the VARTM preimpregnation and segmented curing process, not only is the compact and uniform internal structure of the composite material ensured, but also the internal stress generated in the curing process is significantly reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of wind power material preparation, and specifically relates to a basalt continuous fiber reinforced fatigue-resistant wind power blade material and a preparation method thereof. Background Art

[0002] In the wind power industry, blades are key components of wind turbines, and their performance is directly related to the power generation efficiency and operational reliability of the entire system. Traditional wind turbine blades are mostly made of glass fiber or carbon fiber reinforced polymer-based composite materials. Although these materials meet the use requirements of wind turbine blades to a certain extent, they still have some shortcomings under the long-term complex and variable loads and environmental factors.

[0003] The interfacial bonding strength of traditional wind turbine blade materials needs to be improved. The interfacial bonding between glass fiber or carbon fiber and the resin matrix is ​​weak, which easily leads to stress concentration and microcracks, thus affecting the fatigue resistance and overall structural stability of the blade. Under long-term cyclic loads, these microcracks will gradually expand and eventually lead to the destruction of the blade.

[0004] The resin matrix formula and curing process of traditional wind turbine blade materials need to be further optimized. If the cross-linking density and internal stress of the resin matrix are too high, the rigidity of the blade will decay rapidly during the stress process, and the crack propagation speed will be accelerated, thus shortening the service life of the blade. In addition, the internal stress generated during the curing process will also affect the mechanical properties and dimensional stability of the blade.

[0005] In addition, the performance of traditional wind turbine blade materials in extreme environments needs to be improved. In harsh environments such as humidity, salt spray, and temperature fluctuations, the mechanical properties and fatigue resistance of blade materials will degrade, thus affecting the power generation efficiency and operational reliability of wind turbines. This degradation phenomenon is particularly obvious in offshore wind power or inland extreme climate areas.

[0006] In this regard, the inventors proposed a basalt continuous fiber reinforced fatigue-resistant wind turbine blade material and a preparation method to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a basalt continuous fiber reinforced fatigue-resistant wind turbine blade material and a preparation method to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A basalt continuous fiber reinforced fatigue-resistant wind turbine blade material, comprising, by mass fraction:

[0010] 45% to 60% of basalt continuous fiber, 35% to 50% of modified epoxy resin matrix, 1% to 3% of curing agent and 1% to 5% of interface reinforcing agent.

[0011] Preferably, the basalt continuous fiber is subjected to pretreatment and double surface modification treatment, and the specific steps of the treatment are as follows:

[0012] Pre-cleaning treatment: Ultrasonic cleaning is performed on the basalt fiber to remove surface oil and impurities.

[0013] Plasma treatment: Treat the fiber surface in a low-temperature plasma environment to obtain treated fibers;

[0014] Silane coupling agent impregnation: impregnating the treated fiber, adding a silane coupling agent into a specific solvent, and forming a dense functional film through self-assembly.

[0015] Preferably, the modified epoxy resin matrix adopts high-toughness epoxy resin, and the cross-linking density is regulated by adding a modifier;

[0016] The modifier includes at least one of a polyether polyol and a toughening agent;

[0017] The modified epoxy resin matrix preparation method specifically comprises: adding polyether polyol and nano-scale functional filler to high-toughness epoxy resin, stirring evenly and then standing to degas, ensuring that the matrix has no bubbles, and obtaining a stable modified epoxy resin matrix;

[0018] Curing system regulation: Select curing agent according to the characteristics of the resin system, and regulate reaction temperature and time to ensure that internal stress is minimized during the curing process.

[0019] Preferably, the curing agent includes at least one of a low-volatile amine curing agent, an accelerated amine curing agent, and a mildly reactive amine curing agent, and the curing agent is used to cure the modified epoxy resin matrix.

[0020] Preferably, the low volatility amine curing agent includes at least one of GY-051 condensation amine curing agent and methyltetrahydrophthalic anhydride;

[0021] The accelerated amine curing agent includes at least one of m-phenylenediamine and amidoamine;

[0022] The mildly reactive amine curing agent includes at least one of a SK-302 modified amine curing agent and a polyamide curing agent.

[0023] Preferably, the interface enhancer includes trace nanoparticles and functional fillers, and the nanoparticles include silicon dioxide and carbon nanotubes, which are used to further improve the mechanical properties and fatigue life of the matrix and improve the interface bonding effect between the fiber and the matrix.

[0024] A method for preparing a basalt continuous fiber reinforced fatigue-resistant wind turbine blade material, characterized in that the preparation method comprises the following steps:

[0025] Pre-impregnating the modified basalt continuous fiber with the modified epoxy resin matrix to obtain a pre-impregnated composite material;

[0026] The prepreg composite material is arranged in a mold, and a vacuum-assisted resin transfer molding process is used to inject the remaining modified resin under vacuum conditions to form an intermediate layer composite material;

[0027] Performing a segmented curing treatment on the intermediate layer composite material, using a programmed temperature rise process to minimize the internal stress generated by the composite material during the curing process, thereby obtaining a cured composite material;

[0028] The cured composite material is subjected to mechanical processing and fine surface treatment to finally obtain a wind turbine blade material with excellent fatigue resistance.

[0029] Preferably, the prepreg treatment conditions are: temperature 10-15° C., and treatment time 10-20 min.

[0030] Preferably, the conditions for injecting the remaining modified resin are: temperature 40 to 55° C., vacuum degree -0.8 to -1.0 bar.

[0031] Preferably, the curing treatment conditions are: primary curing at 70-80° C. for 2-3 hours, post-curing at 120-140° C. for 2-3 hours, and then slowly cooling to room temperature.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] (1) The present invention adopts the dual surface modification technology of low-temperature plasma activation and silane coupling agent impregnation to greatly increase the surface active groups of basalt fiber, thereby forming a stronger chemical bond and physical interlocking structure between the fiber and the modified epoxy resin. This enhanced interfacial bonding significantly improves the load transfer efficiency between the fiber and the matrix, effectively prevents stress concentration and the initiation of microcracks, and thus improves the fatigue resistance and overall structural stability of the composite material.

[0034] (2) The present invention optimizes the modified epoxy resin matrix formula, reasonably adds polyether polyols, toughening agents and nano-functional fillers, and forms a homogeneous, bubble-free resin network structure while reducing the crosslinking density and internal stress. Under cyclic load, the material can effectively delay stiffness attenuation and crack propagation, and significantly improve fatigue life.

[0035] (3) The present invention uses advanced VARTM prepreg and segmented curing processes to not only ensure that the internal structure of the composite material is dense and uniform, but also significantly reduce the internal stress generated during the curing process. Wind turbine blades show lower fatigue damage and degradation rates under long-term complex working conditions, extend their service life, reduce the maintenance and replacement frequency caused by material fatigue, and thus reduce overall operating costs.

[0036] (4) The present invention uses the basalt fiber itself to have good corrosion resistance, high temperature resistance and UV resistance, and the modified resin matrix is ​​optimized through the curing process, so that the overall composite material can still maintain excellent mechanical properties in extreme environments such as humidity, salt spray, temperature fluctuations, etc. The material has guaranteed anti-fatigue and anti-aging properties in high humidity, low temperature or high temperature environments, and is suitable for offshore wind power or wind turbine blades in inland extreme climate areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 The present invention is a flow chart of a method for preparing a basalt continuous fiber reinforced fatigue-resistant wind turbine blade material. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1:

[0040] See also Figure 1 , a basalt continuous fiber reinforced fatigue-resistant wind turbine blade material, comprising:

[0041] Basalt continuous fiber: 55%, using high-strength basalt fiber;

[0042] Modified epoxy resin matrix: 40%, Bisphenol A type epoxy resin is selected, and polyether polyol is added as a toughening agent;

[0043] Curing agent: 2%, using low volatility amine curing agent, GY-051 condensation amine curing agent;

[0044] Nano functional filler: 3%, nano silicon dioxide is used to improve the fatigue resistance and interface strength of the matrix;

[0045] Preparation process steps:

[0046] The basalt fiber was placed in an ultrasonic cleaning tank at a frequency of 40 kHz, a temperature of 25°C, and a treatment time of 10 minutes to remove surface oil and impurities to obtain a pre-cleaned fiber;

[0047] The pre-cleaned fiber is placed in a low-temperature plasma device for surface activation. The power of the low-temperature plasma device is 100W, the pressure is about 0.2MPa, and the processing time is 3 minutes to obtain an activated fiber;

[0048] The activated fiber was immersed in a 2 wt % silane coupling agent (γ-aminopropy ltr iethoxys i lane) ethanol solution for 5 minutes, and then dried at 60° C. for 1 hour to obtain modified basalt fiber.

[0049] In a mixing container, epoxy resin, polyether polyol and nano-silica filler were mixed, stirred at a low speed for 10 minutes, and allowed to stand for degassing for 5 minutes to obtain a pre-modified resin.

[0050] Add GY-051 condensation amine curing agent to the pre-modified resin, continue to stir evenly and let stand at room temperature for 10 minutes to obtain a homogeneous modified resin system.

[0051] The modified basalt fiber and the homogeneous modified resin system were pre-impregnated at 15°C for 15 minutes to ensure that the resin fully penetrated the fiber to obtain a pre-impregnated composite material.

[0052] The prepreg material is placed in a high-precision mold and vacuum-assisted resin transfer molding (VARTM) is used. The mold temperature is 50°C, the vacuum is evacuated to -0.8 bar, and the remaining modified resin is injected to ensure that there are no bubbles in the mold to form an intermediate layer composite material;

[0053] The intermediate layer composite material was subjected to a staged curing treatment, with a preliminary curing at 80° C. for 2 hours, a post-curing at 120° C. for 2 hours, and then slowly cooled to room temperature to obtain a cured composite material.

[0054] The cured composite material is machined and finely surface treated to ultimately obtain a wind turbine blade structure that meets size requirements.

[0055] Test steps and data:

[0056] Sample preparation: According to ASTM D3479 standard, the sample size is cut from the wind turbine blade material to 250mm×25mm×5mm.

[0057] Test environment: temperature 25℃, relative humidity 50%.

[0058] Fatigue testing:

[0059] A bending fatigue testing machine was used with a loading frequency of 5 Hz.

[0060] A cyclic bending load was applied with a loading amplitude of 80% of the uniaxial static failure load.

[0061] Test data:

[0062] The average fatigue life is about 1,200,000 cycles.

[0063] The stiffness degradation rate is only 15%, which is significantly better than traditional materials (the degradation rate of traditional materials is 25% and above).

[0064] It can be seen from the above that the fatigue resistance of the material prepared in this embodiment is improved by about 33%, and the interface bonding force is significantly enhanced, ensuring that the wind turbine blades have higher reliability and longer service life under long-term cyclic loads.

[0065] Embodiment 2:

[0066] A basalt continuous fiber reinforced fatigue-resistant wind turbine blade material, comprising:

[0067] Basalt continuous fiber: 60%, using high-strength basalt fiber with double surface modification;

[0068] Modified epoxy resin matrix: 35%, epoxy resin combined with polyether polyol, and 2% carbon nanotubes as a reinforcing agent;

[0069] Curing agent: 3%, use accelerated amine curing agent, m-phenylenediamine;

[0070] Interface enhancer: 2%, using nano-silicon dioxide;

[0071] Preparation process steps:

[0072] The basalt fiber was ultrasonically cleaned at an ultrasonic frequency of 40 kHz, a temperature of 22° C., and a treatment time of 12 minutes to obtain a pre-cleaned fiber.

[0073] The pre-cleaned fiber was surface activated in a low-temperature plasma device with a processing power of 120 W, a processing time of 4 minutes, and a pressure of 0.3 MPa to obtain an activated fiber.

[0074] The activated fiber was immersed in a 2.5wt% silane coupling agent solution for 8 minutes, and then dried at 70°C for 1.5 hours to obtain a modified basalt fiber.

[0075] The modified resin is prepared by mixing epoxy resin, polyether polyol, carbon nanotubes and nano-silicon dioxide in proportion, stirring for 15 minutes and standing for degassing for 10 minutes to form a pre-modified resin.

[0076] Add curing agent m-phenylenediamine, stir evenly and stand at room temperature for 10 minutes to obtain a homogeneous modified resin. Pre-impregnate the modified basalt fiber with the homogeneous modified resin at 10°C for 20 minutes to form a pre-impregnated composite material.

[0077] The prepreg composite material is arranged in the mold and the VARTM process is used for injection. The mold is preheated to 60°C and evacuated to -1.0 bar. The resin is injected to ensure that there are no bubbles to form an intermediate composite layer.

[0078] The intermediate composite layer is cured in sections, with the initial curing at 90°C for 2 hours and the post-curing at 130°C for 2 hours, and then the temperature is slowly lowered to room temperature to obtain a cured composite material, and the cured material is mechanically processed to obtain the final wind turbine blade component.

[0079] Test steps and data

[0080] Sample preparation: The samples were cut according to ASTM D3479 standard, and the size was the same as that in Example 1.

[0081] Test environment: temperature 25℃, relative humidity 45%.

[0082] Fatigue testing:

[0083] A bending fatigue testing machine was used with a loading frequency of 5 Hz.

[0084] Cyclic loads were applied with the loading amplitude set to 85% of the static failure load.

[0085] Test data:

[0086] The average fatigue life is about 1,500,000 cycles, which is about 50% higher than that of traditional materials.

[0087] At the same time, the interlaminar shear strength is increased by about 20% (the shear strength measured in the experiment is 11-12MPa, compared with about 9-10MPa of traditional materials).

[0088] As can be seen from the above, this embodiment makes the surface activity of basalt fiber stronger and the interface bonding tighter by prolonging the surface modification treatment time and increasing the coupling agent concentration;

[0089] The final composite material exhibited longer fatigue life and higher interlaminar shear strength in high load cycle tests, and is suitable for application in wind turbine blade structures with higher requirements.

[0090] Embodiment three:

[0091] A basalt continuous fiber reinforced fatigue-resistant wind turbine blade material, comprising:

[0092] Basalt continuous fiber: 50%, using fibers that have undergone basic pretreatment and single surface modification;

[0093] Modified epoxy resin matrix: 45%, low viscosity epoxy resin, polyether polyol and toughening agent added;

[0094] Curing agent: 1.5%, using low volatility amine curing agent, accelerated amine curing agent, mild reaction amine curing agent;

[0095] Interface enhancer: 3.5%, using nano-silicon dioxide;

[0096] Preparation process steps:

[0097] The basalt fiber was ultrasonically cleaned at an ultrasonic frequency of 40 kHz, a temperature of 28° C., and a treatment time of 8 minutes to obtain pre-cleaned fiber.

[0098] The pre-cleaned fiber was subjected to simplified plasma treatment with the following treatment parameters: power 80 W, treatment time 2 minutes, to obtain partially activated fiber.

[0099] The half of the activated fibers were immersed in a 2 wt % silane coupling agent solution for 4 minutes, and then dried at 60° C. for 30 minutes to obtain modified basalt fibers.

[0100] Preparation of modified resin:

[0101] The low-viscosity epoxy resin, polyether polyol, toughening agent and nano-silica filler were mixed, stirred for 8 minutes and then allowed to stand for 5 minutes for degassing to obtain a pre-modified resin.

[0102] Add the curing agent, stir evenly and let stand at room temperature for 10 minutes to obtain a homogeneous modified resin.

[0103] The modified basalt fiber was pre-impregnated with a homogeneous resin at 12° C. for 15 minutes to obtain a pre-impregnated composite material.

[0104] A vacuum-assisted resin transfer molding process was used, in which the mold was preheated to 45°C, evacuated to -0.9 bar, and the modified resin was injected to ensure that the composite layer was uniform and free of bubbles to form an intermediate composite layer.

[0105] The middle composite layer (G") was cured in sections, with initial curing at 85°C for 1.5 hours and post-curing at 125°C for 1.5 hours, and then slowly cooled to room temperature to obtain a cured composite material.

[0106] The solidified material is subjected to mechanical processing and fine surface treatment to obtain the final wind turbine blade material.

[0107] Test steps and data:

[0108] Sample preparation: The sample was cut according to ASTM D3479 standard, with the size of 250mm×25mm×5mm.

[0109] Test environment: temperature 25℃, relative humidity 50%.

[0110] Fatigue test:

[0111] Use a bending fatigue tester with a loading frequency of 3Hz;

[0112] Cyclic loads were applied with the loading amplitude set to 80% of the static failure load.

[0113] Test data:

[0114] The average fatigue life is about 1,300,000 cycles;

[0115] Stiffness attenuation is controlled within 20%;

[0116] Additional interlaminar shear test results show that the interlaminar shear strength of the composite material is about 10MPa, while traditional materials are generally around 8MPa.

[0117] As can be seen from the above, this embodiment achieves efficient preparation while ensuring mechanical properties by optimizing processing temperature, shortening curing time and reducing energy consumption;

[0118] Test results show that the material has significant improvements in fatigue resistance, interlayer bonding strength and environmental resistance, and is suitable for the production needs of mid- to high-end wind turbine blades.

[0119] From the above, we can see that the dual surface modification technology of low-temperature plasma activation and silane coupling agent impregnation can greatly increase the surface active groups of basalt fibers, thereby forming a stronger chemical bond and physical interlocking structure between the fibers and the modified epoxy resin. This enhanced interfacial bonding significantly improves the load transfer efficiency between the fibers and the matrix, effectively preventing stress concentration and the initiation of microcracks, thereby improving the fatigue resistance and overall structural stability of the composite material.

[0120] By optimizing the modified epoxy resin matrix formula and rationally adding polyether polyols, toughening agents and nano-functional fillers, a homogeneous, bubble-free resin network structure is formed while reducing the crosslinking density and internal stress. Under cyclic loads, the material can effectively delay stiffness attenuation and crack propagation, and significantly improve fatigue life.

[0121] The advanced VARTM prepreg and segmented curing process not only ensures the internal structure of the composite material is dense and uniform, but also significantly reduces the internal stress generated during the curing process. Wind turbine blades show lower fatigue damage and degradation rates under long-term complex working conditions, extend their service life, reduce the maintenance and replacement frequency caused by material fatigue, and thus reduce overall operating costs.

[0122] Basalt fiber itself has good corrosion resistance, high temperature resistance and UV resistance. With the modified resin matrix and optimized curing process, the overall composite material can still maintain excellent mechanical properties in extreme environments such as moisture, salt spray, temperature fluctuations, etc. The material's anti-fatigue and anti-aging properties are guaranteed in high humidity, low temperature or high temperature environments, and is suitable for offshore wind power or wind turbine blades in inland extreme climate areas.

[0123] Basalt continuous fiber has high strength and high modulus properties, combined with lightweight modified epoxy resin matrix, can be used to prepare composite materials with high strength-light weight ratio. This material can not only withstand large loads at a lighter weight, but also has outstanding performance in fatigue resistance and vibration resistance, which helps to improve the overall efficiency and energy capture capability of wind turbine blades.

[0124] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0125] In the drawings of the embodiments disclosed in the present invention, only the structures related to the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0126] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A basalt continuous fiber reinforced fatigue-resistant wind turbine blade material, characterized in that: In terms of percentage by mass fraction, it includes: 45% to 60% of basalt continuous fiber, 35% to 50% of modified epoxy resin matrix, 1% to 3% of curing agent and 1% to 5% of interface reinforcing agent.

2. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material according to claim 1, characterized in that: The basalt continuous fiber is subjected to pretreatment and double surface modification treatment, and the specific steps of the treatment are as follows: Pre-cleaning treatment: Ultrasonic cleaning is performed on the basalt fiber to remove surface oil and impurities. Plasma treatment: Treat the fiber surface in a low-temperature plasma environment to obtain treated fibers; Silane coupling agent impregnation: impregnating the treated fiber, adding a silane coupling agent into a specific solvent, and forming a dense functional film through self-assembly.

3. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material according to claim 1, characterized in that: The modified epoxy resin matrix adopts high-toughness epoxy resin, and the cross-linking density is regulated by adding a modifier; The modifier includes at least one of a polyether polyol and a toughening agent; The modified epoxy resin matrix preparation method specifically comprises: adding polyether polyol and nano-scale functional filler to high-toughness epoxy resin, stirring evenly and then standing to degas, ensuring that the matrix has no bubbles, and obtaining a stable modified epoxy resin matrix; Curing system regulation: According to the characteristics of the resin system, select curing agent and catalyst, regulate reaction temperature and time, and ensure that internal stress is minimized during the curing process.

4. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material according to claim 1, characterized in that: The curing agent comprises at least one of a low-volatile amine curing agent, an accelerated amine curing agent, and a mildly reactive amine curing agent, and the curing agent is used for curing the modified epoxy resin matrix.

5. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material according to claim 4, characterized in that: The low volatility amine curing agent includes at least one of GY-051 condensation amine curing agent and methyltetrahydrophthalic anhydride; The accelerated amine curing agent includes at least one of m-phenylenediamine and amidoamine; The mildly reactive amine curing agent includes at least one of a SK-302 modified amine curing agent and a polyamide curing agent.

6. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material according to claim 1, characterized in that: The interface enhancer comprises trace nanoparticles and functional fillers, and is used to further improve the mechanical properties and fatigue life of the matrix.

7. The method for preparing a basalt continuous fiber reinforced fatigue-resistant wind turbine blade material according to claims 1-6, characterized in that: The preparation method comprises the following steps: Pre-impregnating the modified basalt continuous fiber with the modified epoxy resin matrix to obtain a pre-impregnated composite material; The prepreg composite material is arranged in a mold, and a vacuum-assisted resin transfer molding process is used to inject the remaining modified resin under vacuum conditions to form an intermediate layer composite material; Performing a segmented curing treatment on the intermediate layer composite material, using a programmed temperature rise process to minimize the internal stress generated by the composite material during the curing process, thereby obtaining a cured composite material; The cured composite material is subjected to mechanical processing and fine surface treatment to finally obtain a wind turbine blade material with excellent fatigue resistance.

8. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material and preparation method according to claim 7, characterized in that: The pre-preg treatment conditions are: temperature 10-15° C., and treatment time 10-20 min.

9. The basalt continuous fiber reinforced fatigue-resistant wind turbine blade material and preparation method according to claim 7, characterized in that: The conditions for injecting the remaining modified resin are: temperature 40 to 55° C., vacuum degree -0.8 to -1.0 bar.

10. The basalt continuous fiber reinforced anti-fatigue wind turbine blade material and preparation method according to claim 7, characterized in that: The curing treatment conditions are: primary curing at 70-80° C. for 2-3 hours, post-curing at 120-140° C. for 2-3 hours, and then slowly cooling to room temperature.

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