CN115625944A - FRP material for wind power blade and manufacturing method thereof - Google Patents

FRP material for wind power blade and manufacturing method thereof Download PDF

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Publication number
CN115625944A
CN115625944A CN202211208227.6A CN202211208227A CN115625944A CN 115625944 A CN115625944 A CN 115625944A CN 202211208227 A CN202211208227 A CN 202211208227A CN 115625944 A CN115625944 A CN 115625944A
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fiber
wind power
frp material
sizing agent
manufacturing
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吴健
吴红
刘蔚
董相如
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Nanjing Heikema New Material Technology Co ltd
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Nanjing Heikema New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/08—Impregnating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/16—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer formed of particles, e.g. chips, powder or granules
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/30—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being formed of particles, e.g. chips, granules, powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/02—Composition of the impregnated, bonded or embedded layer
    • B32B2260/021—Fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2260/00—Layered product comprising an impregnated, embedded, or bonded layer wherein the layer comprises an impregnation, embedding, or binder material
    • B32B2260/04—Impregnation, embedding, or binder material
    • B32B2260/046—Synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/106—Carbon fibres, e.g. graphite fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/552—Fatigue strength
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

Abstract

The invention discloses a manufacturing method of an FRP material for wind power blades, which comprises the following steps: weaving the treated glass fiber, basalt fiber and carbon fiber into a mixed fiber fabric with a certain size and a three-dimensional structure by adopting a three-dimensional mixing method; the mixed fiber fabric passes through a liquid tank filled with fiber sizing agent and is immersed into the fiber sizing agent, ultrasonic wave is adopted to act on the fiber sizing agent in the liquid tank to assist in infiltration, and the fabric is further infiltrated by a parallel electric field after being immersed with slurry; drying the impregnated fabric, and then cutting into sheets; determining the total number of layers, then laminating in a mode of paving a layer of nanofiber membrane between two adjacent layers of sheets, uniformly paving chopped carbon fibers between each sheet and the nanofiber membrane, and coating a layer of fiber sizing agent to form a prefabricated body; and dehumidifying the prefabricated body and then carrying out hot press molding to obtain the FRP material for the wind power blade, wherein the prepared FRP material for the wind power blade has excellent shock resistance.

Description

FRP material for wind power blade and manufacturing method thereof
Technical Field
The invention relates to an FRP (fiber reinforced Plastic) material for a wind power blade and a manufacturing method thereof, belonging to the field of FRP materials.
Background
The fan blade is a key component for effectively capturing wind energy of the wind generating set. How to capture larger wind energy under the condition of a certain power of the generator and improve the generating efficiency is always the aim of pursuing wind power generation. The wind capturing capacity is closely related to the shape, length and area of the blade, and the size of the blade is mainly dependent on the material for manufacturing the blade. The lighter the material of the blade, the higher the strength and rigidity, the stronger the load resisting capability of the blade, the larger the blade can be made, and the stronger the wind capturing capability thereof. Therefore, the textile composite material with light weight, high strength and good durability becomes the preferred material for the large-scale wind power generation blade.
The main materials of the fan blade comprise a reinforcing material, a base material, interlayer foam, an adhesive and various auxiliary materials. At present, most reinforcing materials used by fan blades are plates made of glass fiber reinforced composite materials, but the plates are formed by laminating and pressing glass fiber reinforced composite materials, and the laminated plates can be structurally damaged or even destroyed in the working process due to weak interlayer performance under the condition of strong wind impact, and are particularly obvious when the laminated plates are subjected to external impact.
Disclosure of Invention
The invention aims to provide an FRP material for wind power blades and a manufacturing method thereof, which aim to solve the problems in the background technology.
The technical scheme adopted by the invention is as follows:
a manufacturing method of FRP material for wind power blades comprises the following steps:
preparing a fiber product: weaving the treated glass fiber, basalt fiber and carbon fiber into a mixed fiber fabric with a certain size and a three-dimensional structure by adopting a three-dimensional mixing method;
electrically assisted infiltration: the mixed fiber fabric passes through a liquid tank filled with fiber sizing agent and is immersed into the fiber sizing agent, the fiber sizing agent in the liquid tank is acted by ultrasonic waves to assist in infiltration, and the fabric is further infiltrated by an applied parallel electric field after being immersed with slurry;
and (3) drying and cutting: drying the impregnated fabric, and then cutting the fabric into sheets with certain sizes;
layering: determining the total number of layers, then laminating in a mode of paving a layer of nanofiber membrane between two adjacent layers of sheets, uniformly paving chopped carbon fibers between each sheet and the nanofiber membrane, and coating a layer of fiber sizing agent to form a prefabricated body;
molding: and (4) dehumidifying the prefabricated body, and then carrying out hot press molding to obtain the FRP material for the wind power blade.
In a preferred aspect of the present invention, the glass fibers are treated by: burning in air at 350-380 deg.c for 0.6-0.8 hr to eliminate surface glue coating;
as a preferable aspect of the present invention, the basalt fiber is processed in the following manner: the method comprises the following steps of enabling basalt fibers to pass through an expanding yarn machine, enabling the basalt fibers to enter a forming expanding channel by adopting high-speed air flow to form turbulent flow, dispersing the basalt fibers by utilizing the turbulent flow to form looped fibers, enabling the basalt fibers to have bulkiness, and manufacturing the expanded yarn;
as one preferable aspect of the present invention, the carbon fibers are treated by: fully washing with industrial alcohol and drying.
Preferably, the mass ratio of the glass fibers, the basalt fibers and the carbon fibers in the mixed fiber fabric is 6; the mass of the short carbon fibers paved between each layer of sheet and the nano fiber film is 0.8-1% of that of a single sheet; the chopped carbon fibers have a length of 8-10mm and a diameter of 10-15 μm.
As a preferable aspect of the present invention, the fiber sizing agent includes epoxy resin, carbon nanotubes, graphene oxide, a curing agent, and an accelerator; wherein the content of the first and second substances,
the epoxy resin is WD3010 type epoxy resin or WD3011 type epoxy resin;
the content of the carbon nano tube is 0.05-0.07wt%;
the content of the graphene oxide is 0.3-0.5wt%;
the content of the curing agent is 5-10wt%;
the content of the accelerant is 0.03-0.05wt%.
As a preferable mode of the invention, the frequency of the ultrasonic is 50-60KHz, and the sound intensity is 0.9-1.5w/cm 2 。
Preferably, the electric field strength is 4500-5000N/C.
Preferably, the hot-press forming temperature is 240-260 ℃, and the hot-press forming pressure is 50-70MPa.
Preferably, the nanofiber membrane is Ag-SiO 2 A composite nanoparticle film.
The invention also provides the FRP material for the wind power blade prepared by the preparation method.
The invention has the beneficial effects that:
1. the treated glass fiber, basalt fiber and carbon fiber are woven into a mixed fiber fabric with a certain size and a three-dimensional structure by adopting a three-dimensional mixing method, and ultrasound and an electric field are assisted during soaking, so that the soaking effect of the fiber surface structure of the mixed fiber fabric can be obviously improved, a fiber sizing agent can be filled into a fiber surface microstructure to achieve an excellent filling state, a conformal interface can be formed in the curing process, and the interface strength of the FRP material can be improved;
2. the mode of laying a layer of nanofiber membrane between two adjacent layers of sheets is adopted for lamination, and the mode of uniformly spreading chopped carbon fibers and coating a layer of fiber sizing agent between each sheet and the nanofiber membrane is adopted, so that on one hand, the nanofiber membrane serves as a nano-scale reinforcing substance between layers, aggregation areas with different densities are not formed, delamination resistance, damage tolerance and fatigue resistance of products can be improved, and the impact resistance of the products can be improved; on the other hand, by the aid of the spread chopped fibers, a more stable hierarchical structure can be formed by the fiber sizing agent, the nanofiber membrane and the mixed fiber fabric during molding, and comprehensive performance of the FRP material can be improved;
3. by treating the glass fiber, the basalt fiber and the carbon fiber, the infiltration effect of the mixed fiber fabric can be improved, the molding of a more excellent conformal interface is facilitated, and the interface strength of the FRP material can be further improved;
4. the epoxy resin added with the carbon nano tube and the graphene oxide is used as a fiber sizing agent, so that the interface strength of the FRP material is improved.
Drawings
Fig. 1 is a graph of the tendency of a fiber sizing agent to fill an interface with a fiber surface when a parallel electric field is applied after ultrasonic-assisted wetting.
FIG. 2 is an SEM photograph of the FRP material prepared in example 1.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example 1
The embodiment is a manufacturing method of an FRP material for wind power blades, which comprises the following steps:
preparing a fiber product: burning the glass fiber in air at 360 ℃ for 0.6h to remove the surface glue coating; the method comprises the following steps of (1) enabling basalt fibers to pass through a bulking yarn machine, enabling the basalt fibers to enter a forming bulking channel by adopting high-speed air flow to form turbulent flow, dispersing the basalt fibers by utilizing the turbulent flow to form looped fibers, enabling the basalt fibers to have bulkiness, and manufacturing the bulked yarns; fully cleaning the carbon fibers with industrial alcohol and then drying; then weaving the treated glass fiber, basalt fiber and carbon fiber into a mixed fiber fabric with a certain size and a three-dimensional structure by adopting a three-dimensional mixing method, wherein the mass ratio of the glass fiber, the basalt fiber and the carbon fiber in the mixed fiber fabric is 6.8;
electrically assisted infiltration: the mixed fiber fabric is immersed into the fiber sizing agent through a liquid tank filled with the fiber sizing agent, wherein the fiber sizing agent comprises uniformly mixed epoxy resin, carbon nano tubes, graphene oxide, a curing agent and an accelerating agent, and the epoxy resin is WD3010 type epoxy resin or WD3011 type epoxy resin; the content of the carbon nano tube is 0.06wt%; the content of graphene oxide is 0.4wt%; the content of the curing agent is 7wt%; the content of the accelerator is 0.05wt%; the fiber sizing agent in the liquid tank is acted by ultrasonic to assist infiltration, the frequency of the ultrasonic is 50-60KHz, and the sound intensity is 0.9-1.5w/cm 2 Further soaking the fabric by applying a parallel electric field after the fabric is soaked and coated with slurry, wherein the electric field strength is 4700N/C;
and (3) drying and cutting: drying the impregnated fabric, and then cutting the fabric into sheets with certain sizes;
layering: determining the total number of layers of the layer, and then paving a layer of Ag-SiO between two adjacent layers of sheets 2 Laminating the composite nano-particle film and Ag-SiO on each sheet 2 Uniformly spreading short carbon fibers with average length of 9mm and diameter of 12 μm between the composite nano-particle films, coating a layer of the fiber sizing agent, and mixing each layer of sheet material with Ag-SiO 2 The mass of the short carbon fibers paved among the composite nano particle films is 1 percent of that of the single sheet material, so that a prefabricated body is formed;
molding: and (3) dehumidifying the prefabricated body, and then carrying out hot-press molding, wherein the temperature of the hot-press molding is 260 ℃, and the pressure of the hot-press molding is 65MPa, so as to obtain the FRP material for the wind power blade.
Comparative example 1
Substantially the same as in example 1, except that the glass fibers, basalt fibers and carbon fibers were not subjected to pretreatment.
Comparative example 2
Essentially the same as example 1, except that no ultrasound and no electric field assistance were used in the infiltration process.
Comparative example 3
Substantially the same as in example 1, except that the carbon nanotubes and graphene oxide were not contained in the fiber sizing agent.
Comparative example 4
The same as in example 1, except that the specific form of the mat was different.
In this embodiment, the layering step is:
determining the total number of layers of the layers, then sequentially laminating the sheets, and coating a layer of fiber sizing agent between every two layers of sheets to form a prefabricated body.
Comparative example 5
Preparing a fiber product: weaving glass fibers, basalt fibers and carbon fibers into a mixed fiber fabric with a certain size and a three-dimensional structure by adopting a three-dimensional mixing method, wherein the mass ratio of the glass fibers, the basalt fibers and the carbon fibers in the mixed fiber fabric is 6.8;
infiltrating: the mixed fiber fabric is passed through a liquid bath containing fiber sizing agent and is immersed in the fiber sizing agent, the fiber sizing agent comprises epoxy resin, curing agent and accelerating agent, wherein the epoxy resin is WD3010 type epoxy resin or WD3011 type epoxy resin; the content of the curing agent is 7wt%; the content of the accelerator is 0.05wt%;
and (3) drying and cutting: drying the impregnated fabric, and then cutting the fabric into sheets with certain sizes;
layering: determining the total number of layers of the layers, then sequentially laminating the sheets, and coating a layer of fiber sizing agent between every two layers of sheets to form a prefabricated body;
molding: and (3) dehumidifying the prefabricated body, and then carrying out hot-press molding, wherein the temperature of the hot-press molding is 260 ℃, and the pressure of the hot-press molding is 65MPa, so as to obtain the FRP material for the wind power blade.
The difference from the embodiment 1 is that the glass fiber, the basalt fiber and the carbon fiber in the comparative example are not pretreated, ultrasonic waves and electric field assistance are not adopted in the infiltration process, the carbon nano tube and graphene oxide are not contained in the fiber sizing agent, and the specific mode of layering is different.
The FRP materials obtained in example 1 and comparative examples 1 to 5 were cut into respective sizes of 600X 300X 30mm 3 (length x width x height) and the performance test was performed on the test pieces, and the test results are shown in table 1.
TABLE 1
Tensile strength MPa Bending strength Tensile modulus GPa Impact energy absorption KJ/m 2
Example 1 3224 920 188 285
Comparative example 1 2862 902 165 263
Comparative example 2 2672 887 158 256
Comparative example 3 2564 865 155 251
Comparative example 4 2453 849 153 248
Comparative example 5 2231 812 134 237
From the above data, it can be seen that the FRP materials obtained in example 1 have improved properties in various aspects compared to comparative examples 1-5.
Referring to fig. 1 and 2, the invention weaves the treated glass fiber, basalt fiber and carbon fiber into a mixed fiber fabric with a certain size and a three-dimensional structure by a three-dimensional mixing method, can control the cost, and can remarkably improve the wetting effect of the fiber surface structure of the mixed fiber fabric by assisting with ultrasound and an electric field during wetting, so that the fiber sizing agent can be filled into the fiber surface microstructure to achieve an excellent filling state, namely, the combination degree of the two is improved, an excellent conformal interface can be formed in the curing process, a stronger meshing effect is obtained, and the interface strength of the FRP material can be further improved.
According to the invention, the mode of laying a layer of nanofiber membrane between two adjacent layers of sheets is adopted for lamination, and the mode of uniformly spreading short-cut carbon fibers and coating a layer of fiber sizing agent between each sheet and the nanofiber membrane is adopted, so that on one hand, the nanofiber membrane serves as a nano-scale reinforcing substance between layers, and aggregation areas with different densities are not formed, thus being beneficial to improving the delamination resistance, damage tolerance and fatigue resistance of the product, and improving the shock resistance of the product; on the other hand, by the aid of the spread chopped fibers, a more stable hierarchical structure can be formed by the fiber sizing agent, the nanofiber membrane and the mixed fiber fabric during molding, and comprehensive performance of the FRP material can be improved;
according to the invention, by treating the glass fiber, the basalt fiber and the carbon fiber, the infiltration effect of the mixed fiber fabric can be improved, the molding of a more excellent conformal interface is facilitated, and the interface strength of the FRP material can be further improved; and the epoxy resin added with the carbon nano tube and the graphene oxide is used as a fiber sizing agent, so that the interface strength of the FRP material is improved.
Example 2
The FRP material for the wind power blade is prepared by the preparation method in the embodiment 1.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.

Claims (9)

1. A manufacturing method of FRP materials for wind power blades is characterized by comprising the following steps:
preparing a fiber product: weaving the treated glass fiber, basalt fiber and carbon fiber into a mixed fiber fabric with a certain size and a three-dimensional structure by adopting a three-dimensional mixing method;
electrically assisted infiltration: the mixed fiber fabric passes through a liquid tank filled with fiber sizing agent and is immersed into the fiber sizing agent, the fiber sizing agent in the liquid tank is acted by ultrasonic waves to assist in infiltration, and the fabric is further infiltrated by an applied parallel electric field after being immersed with slurry;
and (3) drying and cutting: drying the impregnated fabric, and then cutting the fabric into sheets with certain sizes;
layering: determining the total number of layers, then laminating in a mode of paving a layer of nanofiber membrane between two adjacent layers of sheets, uniformly paving chopped carbon fibers between each sheet and the nanofiber membrane, and coating a layer of fiber sizing agent to form a prefabricated body;
molding: and dehumidifying the prefabricated body and then carrying out hot press molding to obtain the FRP material for the wind power blade.
2. The method for manufacturing FRP material for wind turbine blades as claimed in claim 1,
the treatment mode of the glass fiber is as follows: burning in air at 350-380 deg.c for 0.6-0.8 hr to eliminate surface glue coating;
the basalt fiber is processed in the following way: the method comprises the following steps of (1) enabling basalt fibers to pass through a bulking yarn machine, enabling the basalt fibers to enter a forming bulking channel by adopting high-speed air flow to form turbulent flow, dispersing the basalt fibers by utilizing the turbulent flow to form looped fibers, enabling the basalt fibers to have bulkiness, and manufacturing the bulked yarns;
the carbon fiber is treated in the following way: fully washing with industrial alcohol and drying.
3. The method for manufacturing the FRP material for the wind power blade as claimed in claim 1, wherein the mass ratio of the glass fiber, the basalt fiber and the carbon fiber in the mixed fiber fabric is 6.5-3; the mass of the short carbon fibers paved between each layer of sheet and the nanofiber membrane is 0.8-1% of that of the single sheet; the chopped carbon fibers have a length of 8-10mm and a diameter of 10-15 μm.
4. The method for manufacturing the FRP material for the wind power blade as claimed in claim 1, wherein the fiber sizing agent comprises epoxy resin, carbon nanotubes, graphene oxide, curing agent and accelerator; wherein the content of the first and second substances,
the epoxy resin is WD3010 type epoxy resin or WD3011 type epoxy resin;
the content of the carbon nano tube is 0.05-0.07wt%;
the content of the graphene oxide is 0.3-0.5wt%;
the content of the curing agent is 5-10wt%;
the content of the accelerant is 0.03-0.05wt%.
5. The method for manufacturing the FRP material for the wind power blade as claimed in claim 1, wherein the frequency of the ultrasound is 50-60KHz, and the sound intensity is 0.9-1.5w/cm 2 。
6. The method for manufacturing the FRP material for the wind power blade as claimed in claim 1, wherein the electric field intensity is 4500-5000N/C.
7. The method for manufacturing the FRP material for the wind power blade as claimed in claim 1, wherein the hot press molding temperature is 240-260 ℃ and the hot press molding pressure is 50-70MPa.
8. The method for manufacturing the FRP material for wind power blades as claimed in claim 1, wherein the nanofiber membrane is Ag-SiO 2 Composite nanoparticle films.
9. FRP material for wind blades produced by the method of any one of claims 1 to 8.
CN202211208227.6A 2022-09-30 2022-09-30 FRP material for wind power blade and manufacturing method thereof Pending CN115625944A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101284423A (en) * 2008-05-30 2008-10-15 沈阳航空工业学院 Preparation method of carbon nano tube/carbon fiber multi-dimension mixing composite material
DE102014202993A1 (en) * 2014-02-19 2015-08-20 Bayerische Motoren Werke Aktiengesellschaft Outer skin component for a vehicle, and method for producing an outer skin component
CN108532092A (en) * 2018-03-29 2018-09-14 江苏赛菲新材料有限公司 A kind of preparation method of the three-dimensional thick braided fabric of continuous function fibre bulk yarn
CN112292361A (en) * 2018-03-28 2021-01-29 卓尔泰克公司 Conductive sizing material for carbon fibers
CN113002024A (en) * 2021-02-09 2021-06-22 中复神鹰(上海)科技有限公司 Method for toughening carbon fiber prepreg between nano-particle polymer composite nano-fiber film layers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101284423A (en) * 2008-05-30 2008-10-15 沈阳航空工业学院 Preparation method of carbon nano tube/carbon fiber multi-dimension mixing composite material
DE102014202993A1 (en) * 2014-02-19 2015-08-20 Bayerische Motoren Werke Aktiengesellschaft Outer skin component for a vehicle, and method for producing an outer skin component
CN112292361A (en) * 2018-03-28 2021-01-29 卓尔泰克公司 Conductive sizing material for carbon fibers
CN108532092A (en) * 2018-03-29 2018-09-14 江苏赛菲新材料有限公司 A kind of preparation method of the three-dimensional thick braided fabric of continuous function fibre bulk yarn
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