Method for preparing high-performance plate by utilizing retired wind power blade, high-performance plate and application of high-performance plate

Abstract

The invention relates to a method for preparing a high-performance plate by using an ex-service wind power blade, the high-performance plate and application of the high-performance plate, and the method comprises the following steps: separating the ex-service wind power blade into fiber strips, reinforcing ribs, glass fiber reinforced plastic crushed materials, blade powder and balsa wood-PVC powder, and respectively treating the materials to prepare each component of the multi-effect high-performance plate; and finally, all the components are subjected to compression molding treatment to be manufactured into the multifunctional high-performance plate, all the components of the retired wind power blade can be recycled, and then the disposal problem of the retired wind power blade can be solved. And moreover, the glass fiber filaments obtained by degrading the retired wind turbine blade and the thermosetting resin form the reinforced panel, so that the strength of the multifunctional high-performance plate can be improved while the stability of the overall structure of the reinforced panel is ensured. In addition, compression molding treatment is performed by fully utilizing the characteristics of different parts, so that the illumination resistance of the board can be improved, the board is not easy to deform due to water absorption, and the applicability of the board can be further improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of solid waste treatment, and in particular, to a method for preparing a high-performance board using retired wind turbine blades, the high-performance board and uses thereof. Background Art

[0002] my country's new energy industry has developed by leaps and bounds. As one of the core components, wind turbine blades are generally designed to last for 20 years. With the gradual retirement of wind turbine blades installed 20 years ago and the demand for larger blades over smaller ones, it is expected that wind turbine blades will enter an intensive retirement period from 2025 to 2029, and the number of retired wind turbine blades will increase significantly. The current disposal methods of landfill and burning require a large amount of land resources and pose pollution risks.

[0003] In the prior art, high-performance boards are mostly made of natural wood. However, natural wood has fatal defects such as easy deformation, cracking, mildew, and insect attack during use. In addition, the application range of high-performance boards made of natural wood is relatively small. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing high-performance boards using retired wind turbine blades, high-performance boards and uses thereof, so as to solve the problems existing in the prior art that high-performance boards prepared from natural wood are prone to deformation, warping, mildew, insect and ant damage, and have a small scope of application.

[0005] In order to achieve the above-mentioned object, the present disclosure provides, in a first aspect, a method for preparing a high-performance plate using retired wind turbine blades, the method comprising: S1, cutting the retired wind turbine blades to obtain glass fiber reinforced plastic sheets and balsa wood-PVC mixture; S2, cutting the FRP sheet with a thickness of more than 4 mm to obtain fiber strips and reinforcing ribs; shredding the FRP sheet with a thickness of less than 4 mm to obtain FRP crushed material; crushing and sorting the balsa-PVC mixture to obtain blade powder and balsa-PVC powder; S3, subjecting the fiber strips to a degradation reaction to obtain glass fiber filaments; subjecting the glass fiber filaments and a thermosetting resin to a heat curing treatment to obtain a reinforced panel; The glass fiber reinforced plastic crushed material and the thermosetting resin are subjected to a first glue mixing process to obtain a high-strength structural layer material; The blade powder is modified by a surface modifier and then subjected to a second glue mixing process with a thermosetting resin to obtain a tightly fitting layer material; The balsa wood-PVC powder, thermoplastic resin and antioxidant are subjected to extrusion granulation treatment to obtain an anti-aging surface layer material; S4, laying the anti-aging surface layer material, the reinforcing ribs, the close-fitting layer material, the reinforced panel, the high-strength structural layer material, the reinforced panel, the close-fitting layer material and the anti-aging surface layer material in sequence, and subjecting them to compression molding to obtain a high-performance board.

[0006] Optionally, the dimensions of the reinforced panel include: a length of 120-180cm, a width of 120-180cm, and a thickness of 0.1-0.2cm; the dimensions of the reinforcing ribs include: a ratio of the length of the reinforcing ribs to the length of the reinforced panel is (0.8-0.9):1, a width of 2-3cm, and a thickness of 0.3-0.8cm; the length of the fiber strips is 8-15cm, the width is 3-6cm, and the thickness is 0.3-2cm; the length of the fiberglass crushed material is 1-4cm, and the width is 0.2-0.9cm; the particle size of the blade powder is 300-500 mesh; the particle size of the balsa-PVC powder is 5-10 mesh.

[0007] Optionally, the degradation reaction includes: allowing the fiber strips, alkali and organic solvent to enter a degradation reactor for a degradation reaction, and subjecting the obtained product to an impregnation treatment for more than 60 seconds to obtain the glass fiber filaments; the alkali includes magnesium hydroxide and / or sodium hydroxide; the organic solvent includes polyethylene glycol and / or polypropylene glycol; and the impregnation solution used in the impregnation treatment is water.

[0008] Optionally, the conditions of the degradation reaction include: temperature 160-175° C., pressure 0.9-1.1 MPa, time 280-310 min, and a weight ratio of the fiber strips, alkali and organic solvent of 100:(2-5):(60-80).

[0009] Optionally, the heating and curing treatment includes: laying the glass fiber filaments in a panel mold, and injecting the thermosetting resin into the panel mold to form a reinforced fiber layer; two adjacent glass fiber filaments are placed crosswise and at intervals, and the angle between two adjacent glass fiber filaments is 30-120°; the conditions of the heating and curing treatment include: temperature of 180-200°C, time of 5-8min; the thermosetting resin includes epoxy resin and / or urea-formaldehyde resin.

[0010] Optionally, the temperature of the extrusion granulation process is 165-172°C; the weight ratio of the balsa-PVC powder, the thermoplastic resin and the antioxidant is (38-69):(30-50):(1-2); the thermoplastic resin includes polypropylene and / or polyethylene; and the antioxidant is antioxidant 1010.

[0011] Optionally, the surface modifier includes divinylbenzene and / or acrylamide; the weight ratio of the surface modifier to the blade powder is (0.02-0.04):1; the temperature of the second glue mixing treatment is 70-75°C, the time is 22-32min, and the weight ratio of the blade powder to the thermosetting resin is (75-85):(15-30); the conditions of the first glue mixing treatment include: the temperature is 70-75°C, the time is 10-15min, and the weight ratio of the fiberglass crushed material to the thermosetting resin is (75-85):(15-25).

[0012] Optionally, step S4 also includes: the ratio of the total weight of the anti-aging surface layer material, the total weight of the close-fitting layer material, the total weight of the reinforced panel and the weight of the high-strength structural layer material is 1:(2-2.5):(2-3):(5-8); the number of the reinforcing ribs is 6-12; the conditions of the compression molding process include: temperature of 170-190°C and pressure of 100-120MPa.

[0013] A second aspect of the present disclosure is a high-performance board prepared by the method described in the first aspect.

[0014] The high-performance board described in the second aspect of the present disclosure is used in construction, home decoration, furniture, automobiles, transportation, logistics, packaging, gardening, municipal administration, environmental protection and sports.

[0015] Through the above technical scheme, the present invention separates retired wind turbine blades into fiber strips, reinforcing ribs, fiberglass crushed materials, blade powder and balsa-PVC powder, and processes the above materials separately to make various components of multi-functional high-performance boards, and finally processes each component through compression molding to make a multi-functional high-performance board, which can recycle the various components of retired wind turbine blades, thereby solving the problem of disposing of retired wind turbine blades. In addition, the glass fiber filaments and thermosetting resin obtained by degrading retired wind turbine blades are formed into a reinforced panel, which can improve the strength of the multi-functional high-performance board while ensuring the stability of the overall structure of the reinforced panel. In addition, making full use of the characteristics of different components for compression molding can improve the light resistance of the board and make it less prone to water absorption and deformation, thereby improving the applicability of the board.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1The present invention discloses a flow chart of a method for preparing a high-performance plate using retired wind turbine blades.

[0018] Figure 2 Schematic diagram of a high performance board disclosed herein.

[0019] Description of Reference Numerals A. Retired wind turbine blades; B. High-performance boards; P1. FRP sheets; P2. Balsa-PVC mixture; C1. Fiber strips; C3. FRP crushed materials; L1. Blade powder; L2. Balsa-PVC powder; G. Thermosetting resin; H. Thermoplastic resin; I. Antioxidant; Y1. Anti-aging surface layer material; C2. Reinforcement ribs; Y2. Tight fitting layer material; M. Reinforced panels; Y3. High-strength structural layer material; 1. Surface layer; 2. Reinforcement ribs; 3. Tight fitting layer; 4. Reinforced panel layer; 5. High-strength structural layer. DETAILED DESCRIPTION

[0020] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0021] A first aspect of the present disclosure provides a method for preparing a high-performance board using retired wind turbine blades, the method comprising: S1, cutting retired wind turbine blades to obtain glass fiber reinforced plastic sheets and balsa wood-PVC mixture P2; S2, cutting the FRP sheet P1 with a thickness of more than 4 mm to obtain fiber strips C1 and reinforcing ribs C2; shredding the FRP sheet P1 with a thickness of less than 4 mm to obtain FRP crushed material C3; crushing and sorting the balsa-PVC mixture P2 to obtain blade powder L1 and balsa-PVC powder L2; S3, subjecting the fiber strips C1 to a degradation reaction to obtain glass fiber filaments; subjecting the glass fiber filaments and the thermosetting resin G to a heat curing treatment to obtain a reinforced panel M; The glass fiber reinforced plastic crushed material C3 and the thermosetting resin G are subjected to a first glue mixing process to obtain a high-strength structural layer material Y3; The blade powder L1 is modified by a surface modifier and then subjected to a second glue mixing process with a thermosetting resin G to obtain a tightly fitting layer material Y2; The balsa-PVC powder L2, thermoplastic resin and antioxidant I are subjected to extrusion granulation treatment to obtain an anti-aging surface layer material Y1; S4, laying the anti-aging surface layer material Y1, the reinforcing rib C2, the close-fitting layer material Y2, the reinforced panel M, the high-strength structural layer material Y3, the reinforced panel M, the close-fitting layer material Y2 and the anti-aging surface layer material Y1 in sequence, and subjecting them to compression molding to obtain a high-performance board.

[0022] Through the above technical scheme, the present invention separates retired wind turbine blades into fiber strips, reinforcing ribs, fiberglass crushed materials, blade powder and balsa-PVC powder, and processes the above materials separately to make various components of multi-functional high-performance boards, and finally processes each component through compression molding to make a multi-functional high-performance board, which can recycle the various components of retired wind turbine blades, thereby solving the problem of disposing of retired wind turbine blades. In addition, the glass fiber filaments and thermosetting resin obtained by degrading retired wind turbine blades are formed into a reinforced panel, which can improve the strength of the multi-functional high-performance board while ensuring the stability of the overall structure of the reinforced panel. In addition, making full use of the characteristics of different components for compression molding can improve the light resistance of the board and make it less prone to water absorption and deformation, thereby improving the applicability of the board.

[0023] In one embodiment, the retired wind turbine blades described in step S1 contain fiberglass, PVC and balsa wood, wherein, based on the total weight of the retired wind turbine blades, the content of PVC is 5 weight %, the content of balsa wood is 5 weight %, and the content of fiberglass is 90 weight %.

[0024] In one embodiment, the cutting process described in step S1 is a conventional choice in the art and is not specifically required in this application. For example, the retired wind turbine blades may be first dismembered into blocks by an existing shearing device, then crushed in a special FRP crusher, and finally sorted to obtain FRP sheets P1 and balsa-PVC mixture P2.

[0025] In one embodiment, the shape and size of the FRP sheet P1 obtained in step S1 are related to the cutting process. Here, in order to facilitate subsequent operations, the FRP sheet P1 is provided in a sheet form.

[0026] In one implementation, step S2 further includes: S21, sorting the glass fiber reinforced plastic sheets P1 obtained in step S1, and sorting out the glass fiber reinforced plastic sheets P1 with a thickness of more than 4 mm and less than 4 mm; S22, cutting the glass fiber reinforced plastic sheet P1 with a diameter of more than 4 mm to obtain a cut material; shredding the glass fiber reinforced plastic sheet P1 with a diameter of less than 4 mm to obtain a glass fiber reinforced plastic crushed material C3; S23, sorting the cut materials, selecting the broken materials with a thickness of more than 0.3 cm, a width of more than 2 cm, and a length of more than 95 cm as reinforcement rough blanks, and selecting the cut materials that do not meet the above standards as fiber strip rough blanks; S24. According to the parameters of the high-performance board, the reinforcement rib rough blank is further cut to obtain the reinforcement rib C2, and the fiber strip rough blank is further sorted and cut to obtain the fiber strip C1.

[0027] In this embodiment, during the cutting process of step S1, small debris and very thin glass fiber reinforced plastic sheets P1 are inevitably produced. If these parts are used as reinforcing ribs C2, their strength is poor. If they are used to produce glass fiber filaments, the obtained glass fiber filaments have different sizes, which is not conducive to subsequent sorting and shearing. Therefore, they are directly torn into pieces.

[0028] In one embodiment, the fiber strip C1 prepared in step S24 has a length of 8-15 cm, a width of 3-6 cm, and a thickness of 0.3-2 cm.

[0029] In one embodiment, the dimensions of the reinforcing rib C2 prepared in step S24 include: a ratio of the length of the reinforcing rib C2 to the length of the reinforced panel M is (0.8-0.9):1, a width of 2-3 cm, and a thickness of 0.3-0.8 cm.

[0030] In one embodiment, the glass fiber reinforced plastic crushed material C3 prepared in step S22 has a length of 1-4 cm and a width of 0.2-0.9 cm.

[0031] In one embodiment, step S24 further includes subjecting the balsa-PVC mixture P2 to sorting treatment to obtain leaf powder L1 and balsa-PVC powder L2. The sorting treatment is a conventional choice in the art and is not specifically required in this application. For example, it can be performed by setting 4 sieves.

[0032] In one embodiment, the particle size of the leaf powder L1 is 300-500 mesh.

[0033] In one embodiment, the particle size of the balsa wood-PVC powder L2 is 5-10 mesh.

[0034] In one embodiment, the four screens are respectively the first screen, the second screen, the third screen and the fourth screen, wherein the mesh number of the first screen is 5, the mesh number of the second screen is 10, the mesh number of the third screen is 300, and the mesh number of the fourth screen is 500. In this embodiment, the balsa-PVC mixture P2 obtained in step S1 is sieved through the first screen, and the material on the screen is a powder with a mesh number of 5 or more, and then the material on the screen is sieved through the second screen to obtain a powder with a mesh number of 5-10, that is, the balsa-PVC powder L2; the remaining material on the second screen is sieved through the fourth screen and the third screen in turn to obtain a mesh number of 300-500, and obtain the leaf powder L1.

[0035] In one embodiment, the degradation reaction described in step S3 is a conventional choice in the art and is not specifically required in this application. For example, the degradation reaction includes: The fiber strip C1 alkali and organic solvent are introduced into a degradation reactor for degradation reaction, and the obtained product is subjected to an impregnation treatment for more than 60 seconds; the glass fiber filament is obtained; wherein the alkali includes sodium hydroxide and / or magnesium hydroxide, and the organic solvent includes polyethylene glycol and / or polypropylene glycol; the impregnation solution used in the impregnation treatment is water.

[0036] In one embodiment, the conditions of the degradation reaction include: temperature 160-175° C., pressure 0.9-1.1 MPa, and time 280-310 min.

[0037] In one embodiment, the weight ratio of the fiber strips C1, the alkali and the organic solvent is 100:(2-5):(60-80), preferably 100:4:70.

[0038] In one embodiment, the method for preparing the enhanced panel M in step S3 includes: The glass fiber filaments are laid in a panel mold, and the thermosetting resin G is injected into the panel mold to form a reinforcing fiber layer; the reinforcing fiber layer is subjected to the heat curing treatment at 180-200° C. for 5-8 minutes and then demoulded to obtain the reinforced panel M.

[0039] In one embodiment, the dimensions of the prepared reinforced panel M include: a length of 120-180 cm, a width of 120-180 cm, and a thickness of 0.1-0.2 cm.

[0040] In one embodiment, two adjacent glass fiber filaments are crossed and spaced apart, and the angle between the two adjacent glass fiber filaments is 30-120°, preferably 90°.

[0041] In one embodiment, the thermosetting resin G in step S3 includes epoxy resin and / or urea-formaldehyde resin.

[0042] In one embodiment, the temperature of the extrusion granulation treatment in step S3 is 165-172°C, preferably 168-170°C; the weight ratio of the balsa-PVC powder L2, the thermoplastic resin and the antioxidant is (38-69):(30-50):(1-2), preferably (40-60):(35-45):(1.2-1.8).

[0043] In one embodiment, the thermoplastic resin includes polypropylene and / or polyethylene.

[0044] In one embodiment, the antioxidant is antioxidant 1010.

[0045] In one embodiment, the particle size of the anti-aging surface layer material Y1 obtained after the extrusion granulation treatment is 10-100 mesh, preferably 40-60 mesh.

[0046] In one embodiment, the conditions of the first glue mixing treatment described in step S3 include: a temperature of 70-75°C, preferably 71-74°C; a time of 10-15 min, preferably 11-13 min; a weight ratio of the glass fiber reinforced plastic crushed material C3 and the thermosetting resin G is (75-85):(15-25), preferably (78-83):(18-22).

[0047] In one embodiment, the temperature of the second glue mixing treatment in step S3 is 70-75°C, preferably 71-74°C; the time is 22-32min, preferably 25-30min; the weight ratio of the surface modifier to the blade powder L1 is (0.02-0.04):1, preferably 0.03:1.

[0048] In one embodiment, the surface modifier includes divinylbenzene and / or acrylamide.

[0049] In one implementation, step S4 includes: S41, laying the anti-aging surface layer material Y1 on the bottom of the high-performance board mold, and laying the reinforcing rib C2, the close-fitting layer material Y2, the reinforced panel M, the high-strength structural layer material Y3, the reinforced panel M, the close-fitting layer material Y2 and the anti-aging surface layer material Y1 on it in sequence to form a component to be hot-pressed; S42, subjecting the above-mentioned hot-pressed component to a compression molding process at a temperature of 170-190° C., a pressure of 100-120 MPa, and a time of 1-10 min; S43, cooling the assembly obtained in step S42 to room temperature to obtain the high-performance board B.

[0050] In one embodiment, the ratio of the total weight of the anti-aging surface layer material Y1, the total weight of the close-fitting layer material Y2, the total weight of the reinforced panel M and the weight of the high-strength structural layer material Y3 is 1:(2-2.5):(2-3):(5-8), preferably 1:(2.1-2.4):(2.2-2.8):(6-7).

[0051] In a preferred embodiment, the conditions of the compression molding process include: a temperature of 175° C., a pressure of 100 MPa, and a time of 8 min.

[0052] In one embodiment, the number of the reinforcing ribs C2 in step S41 is 6-12.

[0053] In one embodiment, the number of reinforcing ribs C2 above and below the high-strength structural layer material Y3 is the same, and the placement positions of the reinforcing ribs C2 above and below the high-strength structural layer material Y3 are the same.

[0054] In one embodiment, the prepared high-performance board B includes a surface layer 1, reinforcing ribs 2, a tight fitting layer 3, a reinforced panel layer 4 and a high-strength structural layer 5; wherein the reinforced panel layer 4, the tight fitting layer 3 and the surface layer 1 are sequentially arranged on both sides of the high-strength structural layer 5; and the reinforcing ribs 2 are arranged between the tight fitting layer 3 and the surface layer 1.

[0055] In one embodiment, the length and width of the surface layer 1, the close-fitting layer 3, the reinforced panel layer 4 and the high-strength structural layer 5 are the same, and the specific dimensions include: a length of 120-180 cm and a width of 120-180 cm.

[0056] In one embodiment, if Figure 1 As shown, the method for preparing high-performance panels using retired wind turbine blades includes: S1, cutting the retired wind turbine blades A to obtain glass fiber reinforced plastic sheets P1 and balsa wood-PVC mixture P2; S21, sorting the glass fiber reinforced plastic sheets P1 obtained in step S1, and sorting out the glass fiber reinforced plastic sheets P1 with a thickness of more than 4 mm and less than 4 mm; S22, cutting the glass fiber reinforced plastic sheet P1 with a diameter of more than 4 mm to obtain a cut material; shredding the glass fiber reinforced plastic sheet P1 with a diameter of less than 4 mm to obtain a glass fiber reinforced plastic crushed material C3; S23, sorting the cut materials, selecting the broken materials with a thickness of more than 0.3 cm, a width of more than 2 cm, and a length of more than 95 cm as reinforcement rough blanks, and selecting the cut materials that do not meet the above standards as fiber strip rough blanks; S24, according to the parameters of the high-performance board, further cutting the reinforcement rib rough blank to obtain the reinforcement rib C2, further sorting and cutting the fiber strip rough blank to obtain the fiber strip C1; the fiber strip C1 has a length of 8-15 cm, a width of 3-6 cm, and a thickness of 0.3-2 cm; the dimensions of the reinforcement rib C2 include: the ratio of the length of the reinforcement rib C2 to the length of the reinforced panel M is (0.8-0.9):1, the width is 2-3 cm, and the thickness is 0.3-0.8 cm; The balsa-PVC mixture P2 is sorted to obtain leaf powder L1 with a particle size of 300-500 mesh and balsa-PVC powder L2 with a particle size of 5-10 mesh; S3, placing the fiber strip C1 in an organic solvent containing alkali, and reacting it at a temperature of 160-175°C and a pressure of 0.9-1.1MPa for 280-310min; filtering the reaction material after chemical degradation, and soaking the obtained filaments in a sizing agent for more than 1min, and then filtering them to obtain the glass fiber filaments; laying the glass fiber filaments in a panel mold, and injecting the thermosetting resin G into the panel mold to form a reinforced fiber layer; subjecting the reinforced fiber layer to the heat curing treatment at 180-200°C for 5-8min and then demolding to obtain a reinforced panel M with a length of 120-180cm, a width of 120-180cm and a thickness of 0.1-0.2cm; the weight ratio of the fiber strip C1, alkali and organic solvent is 100:(2-5):(60-80); The glass fiber reinforced plastic crushed material C3 and the thermosetting resin G are mixed and subjected to a first glue mixing treatment to obtain a high-strength structural layer material Y3; the conditions of the first glue mixing treatment include: a temperature of 70-75° C., a time of 10-15 minutes, and a weight ratio of the glass fiber reinforced plastic crushed material C3 to the thermosetting resin G of (75-85): (15-25); The blade powder L1 is modified by a surface modifier and then mixed with a thermosetting resin G for a second mixing treatment to obtain a close-fitting layer material Y2; the second mixing treatment is performed at a temperature of 70-75° C. for 22-32 min, and the weight ratio of the surface modifier to the blade powder L1 is (0.02-0.04):1; The balsa-PVC powder L2, the thermoplastic resin H and the antioxidant are subjected to extrusion granulation treatment to obtain an anti-aging surface layer material Y1; the extrusion granulation treatment temperature is 165-172° C., and the weight ratio of the balsa-PVC powder L2, the thermoplastic resin and the antioxidant is (38-69):(30-50):(1-2); S41, laying the anti-aging surface layer material Y1 on the bottom of the high-performance board mold, and laying the reinforcing rib C2, the close-fitting layer material Y2, the reinforced panel M, the high-strength structural layer material Y3, the reinforced panel M, the close-fitting layer material Y2 and the anti-aging surface layer material Y1 in sequence on the top to form a component to be hot-pressed; the total weight of the anti-aging surface layer material Y1, the total weight of the close-fitting layer material Y2, the total weight of the reinforced panel M and the weight of the high-strength structural layer material Y3 is 1:(2-2.5):(2-3):(5-8); S42, subjecting the above-mentioned hot-pressed component to a compression molding process at a temperature of 170-190° C., a pressure of 100-120 MPa, and a time of 1-10 min; S43, cooling the assembly obtained in step S42 to room temperature to obtain the high-performance board B.

[0057] A second aspect of the present disclosure is a high-performance board prepared by the method described in the first aspect.

[0058] The high-performance board prepared by the method described in the second aspect of the present disclosure is used in the fields of construction, home decoration, furniture, automobiles, transportation, logistics, packaging, gardening, municipal administration, environmental protection and sports.

[0059] The present disclosure is further described below by way of examples, but the present disclosure is not limited thereby. Unless otherwise specified, the compounds used in the following examples and comparative examples are all purchased pharmaceutical reagents.

[0060] Example 1 like Figure 1 As shown, the method for preparing high-performance panels using retired wind turbine blades includes: S1, cutting the retired wind turbine blades A to obtain glass fiber reinforced plastic sheets P1 and balsa wood-PVC mixture P2; S21, sorting the glass fiber reinforced plastic sheets P1 obtained in step S1, and sorting out the glass fiber reinforced plastic sheets P1 with a thickness of more than 4 mm and less than 4 mm; S22, cutting the glass fiber reinforced plastic sheet P1 with a diameter of more than 4 mm to obtain cutting material; shredding the glass fiber reinforced plastic sheet P1 with a diameter of less than 4 mm to obtain glass fiber reinforced plastic crushed material C3 (length 1-2 cm, width 0.2-0.4 cm); S23, sorting the cut materials, selecting the broken materials with a thickness of more than 0.3 cm, a width of more than 2 cm, and a length of more than 95 cm as reinforcement rough blanks, and selecting the cut materials that do not meet the above standards as fiber strip rough blanks; S24, according to the parameters of the high-performance board, further cutting the reinforcement rough blank to obtain the reinforcement C2 (length 140 cm, width 2 cm, thickness 0.3 cm); further sorting and cutting the fiber strip rough blank to obtain the fiber strip C1 (length 8 cm, width 3 cm, thickness 1 cm); The balsa-PVC mixture P2 is sorted to obtain leaf powder L1 with a particle size of 300-500 mesh and balsa-PVC powder L2 with a particle size of 5-10 mesh; S3, placing the fiber strip C1 in polyethylene glycol containing magnesium hydroxide, and reacting for 300 minutes at a temperature of 165°C and a pressure of 1.0 MPa; the weight ratio of the fiber strip C1, magnesium hydroxide, and polyethylene glycol is 100:4:70; then filtering, and soaking the obtained filaments in a wetting agent for 70 seconds, and then filtering to obtain the glass fiber filaments; laying the glass fiber filaments in a panel mold at intervals, and injecting epoxy resin into the panel mold to form a reinforcing fiber layer; subjecting the reinforcing fiber layer to the heating and curing treatment at 180°C for 6 minutes and then demolding to obtain a reinforced panel M (length 150 cm, width 150 cm, thickness 0.15 cm); The glass fiber reinforced plastic crushed material C3 and epoxy resin are subjected to a first mixing treatment at 70° C. for 12 minutes to obtain a high-strength structural layer material Y3; the weight ratio of the glass fiber reinforced plastic crushed material C3 to the epoxy resin is 85:16; The blade powder L1 is modified with divinylbenzene and then dried at 72°C for 2 hours; the dried blade powder L1 and epoxy resin are subjected to a second glue mixing treatment at 70°C for 25 minutes to obtain a tightly bonded layer material Y2; the weight ratio of the surface modifier to the blade powder L1 is 0.02:1, and the weight ratio of the blade powder L1 to the epoxy resin is 75:26; The balsa-PVC powder L2, PP and antioxidant 1010 are subjected to extrusion granulation treatment to obtain an anti-aging surface layer material Y1; the temperature of the extrusion granulation treatment is 167° C., and the weight ratio of the balsa-PVC powder L2, the thermoplastic resin and the antioxidant is 40:40:1.2; S41, laying the anti-aging surface layer material Y1 on the bottom of the high-performance board mold, and laying three reinforcing ribs C2, the close-fitting layer material Y2, the reinforced panel M, the high-strength structural layer material Y3, the reinforced panel M, the close-fitting layer material Y2, the three reinforcing ribs C2 and the anti-aging surface layer material Y1 on it in sequence to form a component to be hot-pressed; the total weight of the anti-aging surface layer material Y1, the total weight of the close-fitting layer material Y2, the total weight of the reinforced panel M and the weight of the high-strength structural layer material Y3 is 10:20:10:200; S42, subjecting the above-mentioned hot-pressed component to a compression molding process at a temperature of 175° C., a pressure of 100 MPa, and a time of 8 min; S43, cool the assembly obtained in step S42 to room temperature to obtain Figure 2 The high performance board B shown (length 150 cm, width 150 cm, thickness 2 cm).

[0061] Example 2 The method for preparing the high performance board is the same as that in Example 1, except that: The dimensions of S2 and fiber strip C1 are 12 cm in length, 4.5 cm in width, and 1.2 cm in thickness; the dimensions of reinforcing rib C2 are 140 cm in length, 2.5 cm in width, and 0.5 cm in thickness; S3, placing the fiber strip C1 in polypropylene glycol containing magnesium hydroxide, and reacting at a temperature of 170° C. and a pressure of 1.1 MPa for 300 min; subjecting the reinforcing fiber layer to the heating and curing treatment at 190° C. for 7 min, and then demolding, to obtain a reinforced panel M; The weight ratio of the glass fiber reinforced plastic crushed material C3 to the epoxy resin is 80:20; The weight ratio of the balsa wood-PVC powder L2, the thermoplastic resin and the antioxidant is 40:45:1.8.

[0062] Example 3 The method for preparing the high performance board is the same as that in Example 1, except that: The dimensions of S2 and fiber strip C1 are 15 cm in length, 6 cm in width, and 2 cm in thickness; the dimensions of reinforcing rib C2 are 140 cm in length, 2.9 cm in width, and 0.7 cm in thickness; S3, placing the fiber strip C1 in polyethylene glycol containing sodium hydroxide and reacting it at a temperature of 170° C. and a pressure of 1.1 MPa for 300 min; subjecting the reinforcing fiber layer to the heat curing treatment at 190° C. for 7 min and then demolding the reinforced panel M; The weight ratio of the surface modifier to the blade powder L1 is 0.025:1, and the weight ratio of the blade powder L1 to the epoxy resin is 75:30; The weight ratio of the glass fiber reinforced plastic crushed material C3 to the epoxy resin is 75:25; The weight ratio of the balsa wood-PVC powder L2, the thermoplastic resin and the antioxidant is 38:50:1.8.

[0063] Example 4 The method for preparing the high-performance board is the same as that in Example 3, except that in step S3, the weight ratio of the balsa-PVC powder L2, the thermoplastic resin and the antioxidant is 40:20:0.8.

[0064] Example 5 The method for preparing the high-performance board is the same as that in Example 3, except that the weight ratio of the balsa-PVC powder L2, the thermoplastic resin and the antioxidant is 50:20:2.5.

[0065] Example 6 The method for preparing the high-performance board is the same as that in Example 3, except that the weight ratio of the blade powder L1 to the epoxy resin during the second glue mixing treatment is 75:10.

[0066] Example 7 The method for preparing the high-performance board is the same as that in Example 3, except that the weight ratio of the glass fiber reinforced plastic crushed material C3 and the thermosetting resin G is 75:10.

[0067] Example 8 The method for preparing the high-performance board is the same as that in Example 3, except that the particle size of the leaf powder L1 is above 500 meshes, and the particle size of the balsa-PVC powder L2 is above 10 meshes.

[0068] Comparative Example 1 The method for preparing the high-performance board is the same as that in Example 3, except that the reinforced panel M is not used when performing steps S41-S43.

[0069] Test Case The high-performance boards prepared in the above Examples 1-8 and Comparative Example 1 and the eucalyptus boards of the same size were tested for performance according to the provisions of the national standard GB / T17657-2022 "Test methods for physical and chemical properties of wood-based panels and veneer wood-based panels", and the test indicators included bending strength, elastic modulus, light fastness, and water absorption. Among them, the eucalyptus boards were obtained by cutting the eucalyptus boards provided by Shiteng Plastic Wood. The test results are shown in Table 1; Table 1 Properties of high performance boards prepared in Examples and Comparative Examples

[0070] As shown in Table 1, according to the data in Examples 1-8 and Comparative Examples 1-2, it can be seen that the method described in the present invention can be used to recycle waste wind turbine blades, which is energy-saving and environmentally friendly. The performance of the high-performance board prepared by the method meets the standard requirements, and the mechanical properties and light stability are excellent, not easy to absorb water and deform, and have good application scenarios. According to the data in Example 3, Example 4 and Example 5, it can be seen that when the weight ratio of balsa wood-PVC powder L2, thermoplastic resin and antioxidant is (38-69): (30-50): (1-2), the mechanical properties and light stability of the high-performance board are excellent, and it is not easy to absorb water and deform. According to the data in Example 3 and Example 6, it can be seen that when the weight ratio of blade powder L1 and thermosetting resin G is (75-85): (15-30), the mechanical properties and light stability of the high-performance board are excellent, and it is not easy to absorb water and deform. According to the comparison of the data in Example 3 and Example 7, when the weight ratio of the glass fiber reinforced plastic crushed material C3 and the thermosetting resin G is (75-85): (15-25), the high-performance board has excellent mechanical properties and light stability, and is not easy to absorb water and deform. According to the comparison of the data in Example 3 and Example 8, when the particle size of the blade powder L1 is 300-500 mesh and the particle size of the balsa wood-PVC powder L2 is 5-10 mesh, the high-performance board has excellent mechanical properties and light stability, and is not easy to absorb water and deform.

[0071] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0072] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0073] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for preparing high-performance boards using retired wind turbine blades, characterized in that: The method includes: S1, cutting the retired wind turbine blades (A) to obtain glass fiber reinforced plastic sheets (P1) and balsa wood-PVC mixture (P2); S2, cutting the FRP sheet (P1) with a thickness of more than 4 mm to obtain fiber strips (C1) and reinforcing ribs (C2); shredding the FRP sheet (P1) with a thickness of less than 4 mm to obtain FRP crushed material (C3); crushing and sorting the balsa-PVC mixture (P2) to obtain blade powder (L1) and balsa-PVC powder (L2); S3, subjecting the fiber strips (C1) to a degradation reaction to obtain glass fiber filaments; subjecting the glass fiber filaments and the thermosetting resin (G) to a heat curing treatment to obtain a reinforced panel (M); The glass fiber reinforced plastic crushed material (C3) and the thermosetting resin (G) are subjected to a first glue mixing process to obtain a high-strength structural layer material (Y3); The blade powder (L1) is modified by a surface modifier and then subjected to a second glue mixing treatment with a thermosetting resin (G) to obtain a tightly fitting layer material (Y2); The balsa-PVC powder (L2), the thermoplastic resin (H) and the antioxidant (I) are subjected to extrusion granulation treatment to obtain an anti-aging surface layer material (Y1); S4. The anti-aging surface layer material (Y1), the reinforcing ribs (C2), the close-fitting layer material (Y2), the reinforced panel (M), the high-strength structural layer material (Y3), the reinforced panel (M), the close-fitting layer material (Y2) and the anti-aging surface layer material (Y1) are laid in sequence and subjected to compression molding to obtain a high-performance board (B).

2. The method according to claim 1, characterized in that The dimensions of the reinforcement panel (M) include: length of 120-180 cm, width of 120-180 cm, thickness of 0.1-0.2 cm; The dimensions of the reinforcing rib (C2) include: the ratio of the length of the reinforcing rib (C2) to the length of the reinforcing panel (M) is (0.8-0.9):1, the width is 2-3 cm, and the thickness is 0.3-0.8 cm; The fiber strip (C1) has a length of 8-15 cm, a width of 3-6 cm, and a thickness of 0.3-2 cm; The length of the glass fiber reinforced plastic crushed material (C3) is 1-4 cm and the width is 0.2-0.9 cm; The particle size of the leaf powder (L1) is 300-500 mesh; The particle size of the balsa wood-PVC powder (L2) is 5-10 mesh.

3. The method according to claim 1, characterized in that The degradation reaction includes: The fiber strip (C1), alkali and organic solvent are placed in a degradation reactor for degradation reaction, and the obtained product is subjected to an impregnation treatment for more than 60 seconds to obtain the glass fiber filament; The base includes magnesium hydroxide and / or sodium hydroxide; The organic solvent includes polyethylene glycol and / or polypropylene glycol; The infiltration solution used in the infiltration treatment is water.

4. The method according to claim 3, characterized in that The conditions of the degradation reaction include: temperature 160-175° C., pressure 0.9-1.1 MPa, time 280-310 min, and a weight ratio of the fiber strip (C1), alkali and organic solvent of 100:(2-5):(60-80).

5. The method according to claim 1, characterized in that The heating and curing process comprises: The glass fiber filaments are laid in a panel mold, and the thermosetting resin (G) is injected into the panel mold to form a reinforcing fiber layer; two adjacent glass fiber filaments are placed crosswise and at intervals, and the angle between the two adjacent glass fiber filaments is 30-120°; The conditions of the heating and curing treatment include: a temperature of 180-200°C and a time of 5-8 minutes; The thermosetting resin (G) includes epoxy resin and / or urea-formaldehyde resin.

6. The method according to claim 1, characterized in that The temperature of the extrusion granulation process is 165-172° C.; the weight ratio of the balsa-PVC powder (L2), the thermoplastic resin and the antioxidant is (38-69):(30-50):(1-2); The thermoplastic resin includes polypropylene and / or polyethylene; The antioxidant is antioxidant 1010.

7. The method according to claim 1, characterized in that The surface modifier includes divinylbenzene and / or acrylamide; the weight ratio of the surface modifier to the leaf powder (L1) is (0.02-0.04):1; The temperature of the second glue mixing treatment is 70-75°C, the time is 22-32 minutes, and the weight ratio of the blade powder (L1) to the thermosetting resin (G) is (75-85):(15-30); The conditions of the first glue mixing treatment include: a temperature of 70-75°C, a time of 10-15 minutes, and a weight ratio of the glass fiber reinforced plastic crushed material (C3) to the thermosetting resin (G) of (75-85):(15-25).

8. The method according to claim 1, characterized in that Step S4 also includes: the ratio of the total weight of the anti-aging surface layer material (Y1), the total weight of the close-fitting layer material (Y2), the total weight of the reinforced panel (M) and the weight of the high-strength structural layer material (Y3) is 1:(2-2.5):(2-3):(5-8); The number of the reinforcing ribs (C2) is 6-12; The compression molding process conditions include: a temperature of 170-190° C. and a pressure of 100-120 MPa.

9. A high performance board prepared by the method according to any one of claims 1 to 8.

10. Use of the high-performance board according to claim 9 in construction, home decoration, furniture, automobiles, transportation, logistics, packaging, gardening, municipal administration, environmental protection and sports.

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