CN114891317A - Degradable pultruded panel composite material and application thereof to wind power blade - Google Patents
Degradable pultruded panel composite material and application thereof to wind power blade Download PDFInfo
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- CN114891317A CN114891317A CN202210526287.6A CN202210526287A CN114891317A CN 114891317 A CN114891317 A CN 114891317A CN 202210526287 A CN202210526287 A CN 202210526287A CN 114891317 A CN114891317 A CN 114891317A
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- 239000002131 composite material Substances 0.000 title claims abstract description 33
- 239000003822 epoxy resin Substances 0.000 claims abstract description 35
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 35
- 239000000835 fiber Substances 0.000 claims abstract description 33
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 26
- 239000011347 resin Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 239000000945 filler Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000003365 glass fiber Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 6
- 150000008064 anhydrides Chemical class 0.000 claims description 6
- 239000004917 carbon fiber Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 6
- 230000015556 catabolic process Effects 0.000 claims description 5
- 238000006731 degradation reaction Methods 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- 239000011342 resin composition Substances 0.000 claims description 5
- -1 amine compounds Chemical class 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 238000010183 spectrum analysis Methods 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 239000005995 Aluminium silicate Substances 0.000 claims description 2
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 2
- 235000012211 aluminium silicate Nutrition 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- VYKXQOYUCMREIS-UHFFFAOYSA-N methylhexahydrophthalic anhydride Chemical group C1CCCC2C(=O)OC(=O)C21C VYKXQOYUCMREIS-UHFFFAOYSA-N 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 230000000593 degrading effect Effects 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 239000002657 fibrous material Substances 0.000 abstract description 4
- 238000012360 testing method Methods 0.000 description 12
- 238000011084 recovery Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000009472 formulation Methods 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 239000000523 sample Substances 0.000 description 6
- 238000000926 separation method Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 238000010248 power generation Methods 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 239000013068 control sample Substances 0.000 description 3
- 238000007792 addition Methods 0.000 description 2
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 2
- 239000004842 bisphenol F epoxy resin Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- WDJHALXBUFZDSR-UHFFFAOYSA-N acetoacetic acid Chemical group CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- XYIBRDXRRQCHLP-UHFFFAOYSA-N ethyl acetoacetate Chemical group CCOC(=O)CC(C)=O XYIBRDXRRQCHLP-UHFFFAOYSA-N 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/50—Shaping or impregnating by compression not applied for producing articles of indefinite length, e.g. prepregs, sheet moulding compounds [SMC] or cross moulding compounds [XMC]
- B29C70/52—Pultrusion, i.e. forming and compressing by continuously pulling through a die
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1438—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing oxygen
- C08G59/1455—Monocarboxylic acids, anhydrides, halides, or low-molecular-weight esters thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
- F03D1/0675—Rotors characterised by their construction elements of the blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
- B29L2031/085—Wind turbine blades
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Medicinal Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Emergency Medicine (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention discloses a degradable pultruded panel composite material and application thereof to wind power blades. The degradable pultruded panel composite material comprises, by mass, 18-50% of a degradable epoxy resin composition, 50-80% of a fiber raw material, 1-5% of a release agent and 0-10% of a filler; the degradable epoxy resin composition contains degradable modified resin. According to the performance design requirement of the pultruded wind turbine blade main beam, the invention designs a composite material which can simultaneously meet the performance design requirement of the pultruded wind turbine blade main beam and has good degradability by optimizing the components and the proportion of each formula of the composite; the method has good application prospect in the field of wind power blades; the pultruded panel prepared by the method has good degradability, and the degraded resin material and fiber material can be recycled, so that the harm to the environment caused by the post-treatment of the existing wind power blade can be effectively avoided.
Description
Technical Field
The invention relates to a degradable pultruded panel composite material and application thereof to a wind power blade, and belongs to the technical field of wind power blades.
Background
Wind power generation plays an important role in renewable energy power generation, and a fan blade is taken as an important part in wind power generation, and the part comprises 50-60 meters long or even hundreds of meters of a main flow blade profile, and the subsequent treatment of the wind power generation is to directly burn the blade at high temperature after being chopped or to discard the blade after being chopped, so that the two methods have great harm to the ecological environment. In the wind blade structure, because the main beam has continuity, the method is very suitable for pultrusion process molding, can greatly shorten the manufacturing time, improves the stability of components, improves the production efficiency of the whole blade, and has better performance.
Therefore, the degradable material capable of meeting the performance design requirement of the pultrusion wind power blade main beam is developed, and the environmental protection problem caused by the follow-up treatment of the wind power blade can be solved.
Disclosure of Invention
The invention aims to provide a degradable material capable of meeting the performance design requirement of a pultruded wind turbine blade so as to solve the environmental protection problem caused by subsequent treatment of the wind turbine blade.
In order to achieve the purpose, the invention provides a degradable pultruded panel composite material, which comprises the following components in percentage by mass:
18-50% of degradable epoxy resin composition;
50-80% of fiber raw material;
1-5% of a release agent;
0 to 10% of filler, but not 0.
The degradable epoxy resin composition contains degradable modified resin shown as a formula I:
wherein n in the formula I is a natural number.
Preferably, the degradable epoxy resin composition comprises the following components in percentage by mass:
50-100% of epoxy resin; the epoxy resin is conventional epoxy resin sold in the market, and includes but is not limited to bisphenol A epoxy resin, bisphenol F epoxy resin or a combination of the two;
0-50% of degradable modified resin shown as a formula I but not 0;
the anhydride curing agent accounts for 80-120% of the total of the two resins;
wherein the sum of the three components is 100 percent;
the degradable epoxy resin composition has 1760-1710cm in infrared spectral analysis -1 Characteristic peak.
Preferably, the fiber raw material is any one of glass fiber and carbon fiber; the filler is at least one of kaolin, calcium carbonate, aluminum hydroxide, glass fiber powder and carbon fiber powder; the anhydride curing agent is 2-methyltetrahydrophthalic anhydride (MTHPA).
Preferably, the degradable pultruded panel composite material can be degraded by heating with amine compounds under alkaline conditions to separate fibers. Specifically, the decomposition effect is achieved by combining amine groups and acetoacetate groups in the degradable modified resin formula I into dynamic enamine bonds.
Preferably, the temperature range of the heating degradation is 80-200 ℃, and the time is 1-48 h.
The invention also provides application of the degradable pultruded panel composite material in a wind power blade main beam.
The invention also provides a degradable wind power blade main beam, and the preparation raw materials of the degradable wind power blade main beam comprise the degradable pultruded panel composite material.
The invention also provides a preparation method of the degradable wind power blade main beam, which comprises the following steps:
step 1: preparing the degradable resin composition, the release agent and the filler into an epoxy resin glue solution;
step 2: leading out the fiber raw materials arranged on the creel from the yarn cylinder and arranging the fiber raw materials in order;
and step 3: uniformly impregnating the regularly arranged fiber raw materials in the epoxy resin glue solution obtained in the step 1, wherein the regularity of fibers must be ensured in the impregnation process;
and 4, step 4: the preimpregnated fiber raw materials pass through a preforming device and run in a continuous mode to ensure the corresponding positions of the preimpregnated fiber raw materials, the preimpregnated fiber raw materials are gradually transformed into the shape of a plate through the preforming device, meanwhile, redundant resin is extruded out, and then the plate enters a mould to be molded and cured;
and 5: the impregnated fiber raw material which becomes the shape of the plate enters a mould to be solidified and molded in the mould;
step 6: the cured sheet is pulled from the die by a pulling device and cut to the desired length as required.
Preferably, the curing and forming in step 5 is divided into three stages, and the curing temperatures of the three stages are respectively: 100-120 ℃, 140-160 ℃ and 180-210 ℃; and in the step 6, the pulling speed of the traction device is 1-3 m/min.
The invention also provides a degradable epoxy resin composition, which comprises the following components in percentage by mass:
50-100% of epoxy resin; the epoxy resin is conventional epoxy resin sold in the market, and includes but is not limited to bisphenol A epoxy resin, bisphenol F epoxy resin or a combination of the two;
0-50% of degradable modified resin shown as a formula I but not 0;
the anhydride curing agent accounts for 80-120% of the total of the two resins;
wherein the sum of the three components is 100 percent;
the degradable epoxy resin composition has 1760-1710cm in infrared spectral analysis -1 A characteristic peak;
wherein n in the formula I is a natural number.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the performance design requirement of the pultruded wind turbine blade main beam, the invention designs a composite material which can simultaneously meet the performance design requirement of the pultruded wind turbine blade main beam and has good degradability by optimizing the components and the proportion of each formula of the composite; therefore, the degradable pultruded panel composite material has a good application prospect in the field of wind power blades;
(2) the pultruded panel prepared by the method has good degradability, and the degraded resin material and fiber material can be recycled, so that the harm to the environment caused by the post-treatment of the existing wind power blade can be effectively avoided.
Drawings
FIG. 1 is an infrared ray analysis chart of the degradable epoxy resin composition of the present invention: (a) an epoxy resin containing no degradation component, (b) a degradable epoxy resin composition.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
In the following examples, the degradable modified resin used has the structure of formula I:
examples 1 to 2 and comparative examples 1 to 2
Examples 1-2 and comparative examples 1-2 are preliminary evaluations of the formulations of the degradable epoxy resin compositions, the mass percentages of the components of the formulations are shown in the tableAs shown in Table 1, the infrared analysis of the formulation had a thickness of 1725cm -1 Characteristic carbonyl (carbonyl) peaks, as shown in FIG. 1. After mixing, curing at 70 ℃ for 6 hours, evaluating the glass transition temperature (Tg) by using a thermal Differential Scanning Calorimeter (DSC), and initially evaluating the degradability of the amine compound in an alkaline environment.
TABLE 1 preliminary evaluation of degradable resin composition formulation
From the above preliminary evaluation, it is found that when the addition amount of the degradable modified resin is too high, the physical properties of the whole cured product are lowered to be lower than the specification (comparative example 2), and when the content of the degradable modified resin is too low, the degradability is not good (comparative example 1), and therefore, in the following examples, the plate-making evaluation is conducted by using the formulation of the degradable epoxy resin composition of example 2.
Example 3
A composite material pultruded panel is prepared by the following raw materials: the fiber material, the degradable resin composition, the release agent and the filler are prepared by the following steps of:
(1) preparing the degradable resin composition, the release agent and the filler into an epoxy resin glue solution;
(2) leading out the fiber raw materials arranged on the creel from the yarn cylinder and arranging the fiber raw materials in order;
(3) uniformly impregnating the regularly arranged fiber raw materials with epoxy resin glue solution, wherein the regularity of the fibers must be ensured in the impregnation process;
(4) the preimpregnated fiber raw materials pass through a preforming device and run in a continuous mode to ensure the corresponding positions of the preimpregnated fiber raw materials, the preimpregnated fiber raw materials are gradually transformed into the shape of a plate through the preforming device, meanwhile, redundant resin is extruded out, and then the plate enters a mould to be molded and cured;
(5) the impregnated fiber raw material which becomes a plate shape enters a die to be cured and molded in the die, and the curing temperature is divided into three stages, namely 120 ℃ → 140 → 180 ℃.
(6) And pulling the solidified plate out of the die by using a traction device at the pulling speed of 1m/min, and cutting the solidified plate into required lengths according to requirements.
Wherein the fiber raw material is carbon fiber; the filler was calcium carbonate, resulting in a 105 × 5 carbon plate.
Example 4
A composite material pultruded panel, the raw material formulation is shown in Table 2, and the embodiment is different from the embodiment 3 in that the curing temperature in the step (5) is three stages, namely 120 ℃ → 150 → 185 ℃ and the pulling speed in the step (6) is 2 m/min.
Example 5
A composite material pultruded panel has a composition formula shown in Table 2, and the embodiment is different from the embodiment 3 in that the curing temperature in the step (5) is divided into three stages, namely 120 ℃→ 140 → 180 ℃ and the pulling rate in the step (6) is 3 m/min.
Examples 6 to 7
The degradable fan blade is different from the formula of example 3 in composition, and the components and the corresponding mass percentages are shown in table 2.
Table 2 Components and mass percentages thereof in examples 3 to 7
Example 8
A composite pultruded panel, different from example 3 in that the fiber material in the formulation was glass fiber, purchased from SUD1240, taishan glass fiber co.
Comparative example 3
A composite material pultruded panel, which is different from example 3 in that the degradable epoxy resin and the like in the above steps are replaced by common epoxy resin.
Performance test
Test samples: the composite pultruded panels obtained in examples 3 to 8 were used and numbered in the order of test samples 1 to 6, and the composite pultruded panel obtained in comparative example 3 was used as control sample 1.
The evaluation method comprises the following steps: weighing the test pultruded panel, cutting the test pultruded panel into proper sizes, performing resin degradation operation (the decomposition effect is achieved by combining amino and acetoacetic ester groups in the degradable modified resin formula I into dynamic enamine bonds), obtaining a recovery liquid and solid recovery materials (containing fillers and fibers) after degradation, weighing the weight of the total solid recovery materials, and calculating to obtain the solid recovery ratio. The calculation formula is that the solid recovery ratio is (original plate weight-recovered solid weight)/original plate weight, and the theoretical solid ratio and the actual recovery ratio are compared, so as to obtain the separation rate. Separation (%) of 1- ((actual recovery ratio-theoretical composite material ratio)/theoretical resin ratio)). 100%
The results of the analysis are shown in Table 3.
TABLE 3 test results of test samples 1 to 6 and control sample 1
| Sample(s) | Theoretical composite material percentage (%) | Actual recovery solids percentage (%) | Separation Rate (%) |
| |
64 | 64 | 100 |
| Test sample2 | 64 | 63 | 97 |
| Test sample 3 | 64 | 64 | 100 |
| Test sample 4 | 62 | 66 | 94 |
| Test sample 5 | 58 | 60 | 95 |
| Test sample 6 | 64 | 65 | 97 |
| |
64 | 96 | 11 |
Combining examples 3 and 5 and comparative example 3 and table 3, it can be seen that the use of the novel degradable resin instead of the mainstream resin can achieve a separation rate of 100% in the composite material pultruded panel, meaning that the resin in the panel can be completely degraded and recycled by this method and reused.
Combining examples 3 and 4-7 with Table 3, it can be seen that different ratios of auxiliary materials are combined to effectively degrade and separate, with a separation rate of at least greater than 90%.
Combining example 3 and example 8 with table 3, it can be seen that the separation rate in the glass fiber composite system can also reach 97%, indicating that both carbon fiber and glass fiber have good recyclability characteristics.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way and substantially, it should be noted that those skilled in the art may make several modifications and additions without departing from the scope of the present invention, which should also be construed as a protection scope of the present invention.
Claims (10)
1. The degradable pultruded panel composite material is characterized by comprising the following components in percentage by mass:
18-50% of degradable epoxy resin composition;
50-80% of fiber raw material;
1-5% of a release agent;
0 to 10% of filler, but not 0.
The degradable epoxy resin composition contains degradable modified resin shown as a formula I:
wherein n in the formula I is a natural number.
2. The degradable pultruded panel composite according to claim 1, wherein said degradable epoxy resin composition comprises the following components in mass percent:
50-100% of epoxy resin;
0-50% of degradable modified resin shown as a formula I but not 0;
the anhydride curing agent accounts for 80-120% of the total of the two resins;
wherein the sum of the three components is 100 percent;
the degradable epoxy resin composition has 1760-1710cm in infrared spectral analysis -1 Characteristic peak.
3. The degradable pultruded panel composite according to claim 1, wherein the fiber raw material is any one of glass fiber and carbon fiber; the filler is at least one of kaolin, calcium carbonate, aluminum hydroxide, glass fiber powder and carbon fiber powder; the anhydride curing agent is 2-methyltetrahydrophthalic anhydride.
4. The degradable pultruded panel composite according to claim 1, wherein said degradable pultruded panel composite is capable of thermally degrading with amine compounds under alkaline conditions to separate fibers.
5. The degradable pultruded panel composite according to claim 4, wherein the temperature range for thermal degradation is 80-200 ℃ for 1-48 h.
6. Use of the degradable pultruded panel composite according to any of the claims 1 to 5 in a main beam of a wind turbine blade.
7. A degradable wind power blade main beam is characterized in that the preparation raw material comprises the degradable pultruded panel composite material according to any one of claims 1 to 5.
8. The preparation method of the degradable wind power blade main beam of claim 7, characterized by comprising the following steps:
step 1: preparing the degradable resin composition, the release agent and the filler into an epoxy resin glue solution;
step 2: leading out the fiber raw materials arranged on the creel from the yarn cylinder and arranging the fiber raw materials in order;
and step 3: uniformly impregnating the regularly arranged fiber raw materials into the epoxy resin glue solution obtained in the step 1, wherein the regularity of the fibers must be ensured in the impregnation process;
and 4, step 4: the preimpregnated fiber raw materials pass through a preforming device and run in a continuous mode to ensure the corresponding positions of the preimpregnated fiber raw materials, the preimpregnated fiber raw materials are gradually transformed into the shape of a plate through the preforming device, meanwhile, redundant resin is extruded out, and then the plate enters a mould to be molded and cured;
and 5: the impregnated fiber raw material which becomes the shape of the plate enters a mould to be solidified and molded in the mould;
step 6: the cured sheet is pulled from the die by a pulling device and cut to the desired length as required.
9. The preparation method of the degradable wind power blade girder according to claim 8, wherein the curing molding in the step 5 is divided into three stages, and the curing temperatures of the three stages are respectively: 100-120 ℃, 140-160 ℃ and 180-210 ℃; and in the step 6, the pulling speed of the traction device is 1-3 m/min.
10. The degradable epoxy resin composition is characterized by comprising the following components in percentage by mass:
50-100% of epoxy resin;
0-50% of degradable modified resin shown as a formula I but not 0;
the anhydride curing agent accounts for 80-120% of the total of the two resins;
wherein the sum of the three components is 100%;
the degradable epoxy resin composition has 1760-1710cm in infrared spectral analysis -1 A characteristic peak;
wherein n in the formula I is a natural number.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210526287.6A CN114891317B (en) | 2022-05-16 | 2022-05-16 | Degradable pultrusion plate composite material and application thereof on wind power blade |
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|---|---|---|---|
| CN202210526287.6A CN114891317B (en) | 2022-05-16 | 2022-05-16 | Degradable pultrusion plate composite material and application thereof on wind power blade |
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| CN114891317B CN114891317B (en) | 2023-12-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020161162A1 (en) * | 2001-02-06 | 2002-10-31 | Uday Kumar | Ambient cure fast dry solvent borne coating compositions |
| CN112778705A (en) * | 2020-12-31 | 2021-05-11 | 惠柏新材料科技（上海）股份有限公司 | Epoxy resin composition and preparation method and application thereof |
| CN113292819A (en) * | 2021-03-03 | 2021-08-24 | 北玻院(滕州)复合材料有限公司 | Epoxy resin composition capable of being rapidly cured at medium and low temperature, epoxy resin-based composite material and preparation method thereof |
| CN114195984A (en) * | 2021-12-23 | 2022-03-18 | 上海交通大学 | Bisphenol A type epoxy curing agent containing dynamic enamine bond, degradable epoxy resin and preparation, remodeling and degradation methods thereof |
| CN115703892A (en) * | 2021-08-09 | 2023-02-17 | 中南民族大学 | High-performance degradable epoxy resin-carbon fiber composite material and preparation method thereof |
-
2022
- 2022-05-16 CN CN202210526287.6A patent/CN114891317B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020161162A1 (en) * | 2001-02-06 | 2002-10-31 | Uday Kumar | Ambient cure fast dry solvent borne coating compositions |
| CN112778705A (en) * | 2020-12-31 | 2021-05-11 | 惠柏新材料科技（上海）股份有限公司 | Epoxy resin composition and preparation method and application thereof |
| CN113292819A (en) * | 2021-03-03 | 2021-08-24 | 北玻院(滕州)复合材料有限公司 | Epoxy resin composition capable of being rapidly cured at medium and low temperature, epoxy resin-based composite material and preparation method thereof |
| CN115703892A (en) * | 2021-08-09 | 2023-02-17 | 中南民族大学 | High-performance degradable epoxy resin-carbon fiber composite material and preparation method thereof |
| CN114195984A (en) * | 2021-12-23 | 2022-03-18 | 上海交通大学 | Bisphenol A type epoxy curing agent containing dynamic enamine bond, degradable epoxy resin and preparation, remodeling and degradation methods thereof |
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