CN114891317B - Degradable pultrusion plate composite material and application thereof on wind power blade - Google Patents
Degradable pultrusion plate composite material and application thereof on wind power blade Download PDFInfo
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- CN114891317B CN114891317B CN202210526287.6A CN202210526287A CN114891317B CN 114891317 B CN114891317 B CN 114891317B CN 202210526287 A CN202210526287 A CN 202210526287A CN 114891317 B CN114891317 B CN 114891317B
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- 239000002131 composite material Substances 0.000 title claims abstract description 28
- 239000000835 fiber Substances 0.000 claims abstract description 32
- 239000003822 epoxy resin Substances 0.000 claims abstract description 31
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 31
- 239000002994 raw material Substances 0.000 claims abstract description 30
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 30
- 239000000203 mixture Substances 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 150000008064 anhydrides Chemical class 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 230000015556 catabolic process Effects 0.000 claims description 7
- 238000006731 degradation reaction Methods 0.000 claims description 7
- 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
- 239000004593 Epoxy Substances 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
- 239000011342 resin composition Substances 0.000 claims description 5
- -1 amine compounds Chemical class 0.000 claims description 4
- 238000002329 infrared spectrum Methods 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 238000002360 preparation method 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
- SOOZEQGBHHIHEF-UHFFFAOYSA-N methyltetrahydrophthalic anhydride Chemical compound C1C=CCC2C(=O)OC(=O)C21C SOOZEQGBHHIHEF-UHFFFAOYSA-N 0.000 claims 4
- 238000013461 design Methods 0.000 abstract description 8
- 239000002657 fibrous material Substances 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 12
- 238000009472 formulation Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 239000000523 sample Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 239000007787 solid Substances 0.000 description 7
- 238000000926 separation method Methods 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 238000007792 addition Methods 0.000 description 3
- 239000013068 control sample Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- WDJHALXBUFZDSR-UHFFFAOYSA-N acetoacetic acid Chemical group CC(=O)CC(O)=O WDJHALXBUFZDSR-UHFFFAOYSA-N 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 2
- 239000004842 bisphenol F epoxy resin Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 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
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
Classifications
-
- 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
Landscapes
- 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 design requirement of the main girder performance of the pultruded wind turbine blade, the invention designs a combined material which can simultaneously meet the design requirement of the main girder performance of the pultruded wind turbine blade and has good degradability through optimizing the components and the proportion of each formula of the composition; the method has good application prospect in the field of wind power blades; the pultruded plate prepared by the invention has good degradability, and the degraded resin material and fiber material can be recycled, so that the damage to the environment in the post-treatment of the existing wind power blade can be effectively avoided.
Description
Technical Field
The invention relates to a degradable pultrusion plate composite material and application thereof to wind power blades, and belongs to the technical field of wind power blades.
Background
Wind power generation plays an important role in renewable energy power generation, fan blades are an important part in wind power generation, the part comprises 50-60 meters long and even hundreds of meters long of main flow blade types, the current follow-up treatment is realized by directly burning the blades at high temperature after cutting the blades or discarding the blades after cutting, and the two methods have great harm to the ecological environment. In the wind blade structure, the main beam has continuity, so that the wind blade structure is very suitable for being formed by a pultrusion process, the manufacturing time can be greatly shortened, the stability of the part is improved, the production efficiency of the whole blade is improved, and the wind blade structure has better performance.
Therefore, a degradable material capable of meeting the performance design requirements of the main girder of the pultruded wind turbine blade is developed, and the problem of environmental protection caused by subsequent treatment of the wind turbine blade can be solved.
Disclosure of Invention
The invention aims to provide a degradable material capable of meeting the performance design requirements of a pultruded wind turbine blade, so as to solve the environmental protection problem brought by subsequent treatment of the wind turbine blade.
In order to achieve the above purpose, the invention provides a degradable pultruded panel composite material, which comprises the following components in percentage by mass:
18-50% of a degradable epoxy resin composition;
50-80% of fiber raw materials;
1-5% of a release agent;
0-10% filler, but not 0.
The degradable epoxy resin composition contains a degradable modified resin shown in a formula I:
wherein n in 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 a commercially available conventional epoxy resin, including but not limited to bisphenol A epoxy resin, bisphenol F epoxy resin or a combination of the two;
0-50% of degradable modified resin shown in formula I, but not 0;
the anhydride curing agent is 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 spectrum analysis -1 Characteristic peaks.
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 heated and degraded with amine compounds under alkaline conditions to separate fibers. Specifically, the decomposition effect is achieved by combining an amino group with an acetoacetate group in the degradable modified resin formula I to form a dynamic enamine bond.
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 pultrusion plate composite material in a wind power blade girder.
The invention also provides a degradable wind power blade girder, and the preparation raw materials of the degradable wind power blade girder 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 a degradable resin composition, a release agent and a filler into an epoxy resin glue solution;
step 2: leading out the fiber raw materials arranged on the creel from the creel and arranging the fiber raw materials in order;
step 3: uniformly impregnating the orderly arranged fiber raw materials with the epoxy resin glue solution obtained in the step 1, wherein the uniformity of the fibers must be ensured in the impregnation process;
step 4: the pre-impregnated fiber raw materials pass through a pre-forming device to run in a continuous mode, ensure the corresponding positions of the pre-impregnated fiber raw materials, gradually overreach the shape of a plate material through the pre-forming device, simultaneously extrude redundant resin, then enter a die and carry out forming and curing;
step 5: the impregnated fiber raw material in the shape of a plate enters a mould to be solidified and molded in the mould;
step 6: the cured sheet is pulled from the die using a pulling device and cut to the desired length as desired.
Preferably, 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 ℃; the pulling speed of the traction device in the step 6 is 1-3m/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 a commercially available conventional epoxy resin, including but not limited to bisphenol A epoxy resin, bisphenol F epoxy resin or a combination of the two;
0-50% of degradable modified resin shown in formula I, but not 0;
the anhydride curing agent is 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 spectrum analysis -1 Characteristic peaks;
wherein n in formula I is a natural number.
Compared with the prior art, the invention has the beneficial effects that:
(1) According to the design requirement of the main girder performance of the pultruded wind turbine blade, the invention designs a combined material which can simultaneously meet the design requirement of the main girder performance of the pultruded wind turbine blade and has good degradability through optimizing the components and the proportion of each formula of the composition; therefore, the degradable pultrusion plate composite material has good application prospect in the field of wind power blades;
(2) The pultruded plate prepared by the invention has good degradability, and the degraded resin material and fiber material can be recycled, so that the damage to the environment in the post-treatment of the existing wind power blade can be effectively avoided.
Drawings
FIG. 1 shows an infrared analysis of a degradable epoxy resin composition of the present invention: (a) An epoxy resin free of degradation components, (b) a degradable epoxy resin composition.
Detailed Description
In order to make the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
In the following examples, the degradable modified resins used have the structure of formula I:
examples 1 to 2 and comparative examples 1 to 2
Examples 1 to 2 and comparative examples 1 to 2 were preliminary evaluation of formulations of the degradable epoxy resin compositions, the mass percentages of the components corresponding to the formulations are shown in Table 1, and the infrared analysis of the formulations has a value of 1725cm -1 Carbonyl (carbonyl) characteristic peaks, as shown in figure 1. After mixing, curing for 6 hours at 70 degrees celsius, glass transition temperature (Tg) was evaluated using a thermal Differential Scanning Calorimeter (DSC) and degradability was simply and initially evaluated in alkaline environment with amine compounds.
Table 1 preliminary evaluation of degradable resin composition formulation
From the above preliminary evaluation, it was found that when the addition amount of the degradable modified resin was too high, the physical properties of the cured product as a whole were lowered to be lower than the specification (comparative example 2), and when the content of the degradable modified resin was too low, the degradability was poor (comparative example 1), so in the following examples, the board evaluation was conducted in the formulation of the degradable epoxy resin composition of example 2.
Example 3
A composite material pultruded panel is prepared from the following raw materials: the fiber raw material, the degradable resin composition, the release agent and the filler, the components and the corresponding mass percentages of which are shown in table 2, are prepared by the following steps:
(1) Preparing a degradable resin composition, a release agent and a filler into an epoxy resin glue solution;
(2) Leading out the fiber raw materials arranged on the creel from the creel and arranging the fiber raw materials in order;
(3) Uniformly impregnating the orderly arranged fiber raw materials with epoxy resin glue solution, wherein the uniformity of the fibers must be ensured in the impregnation process;
(4) The pre-impregnated fiber raw materials pass through a pre-forming device to run in a continuous mode, ensure the corresponding positions of the pre-impregnated fiber raw materials, gradually overreach the shape of a plate material through the pre-forming device, simultaneously extrude redundant resin, then enter a die and carry out forming and curing;
(5) The impregnated fiber raw material in the shape of a plate enters a mould to be cured and formed in the mould, and the curing temperature is divided into three stages, namely 120 ℃ to 140 ℃ to 180 ℃.
(6) The cured sheet was pulled out of the mold at a pulling speed of 1m/min by a pulling device and cut to a desired length as desired.
Wherein, the fiber raw material is carbon fiber; the filler was calcium carbonate, and a 105×5 carbon plate was obtained.
Example 4
The raw material formulation of the composite pultruded panel is shown in Table 2, and the embodiment is different from example 3 in that the three stages of curing temperature in the step (5) are 120 ℃ to 150 ℃ to 185 ℃ respectively, and the pulling speed in the step (6) is 2m/min.
Example 5
The formulation of the composite pultruded panel is shown in Table 2, and the embodiment is different from example 3 in that the curing temperature in the step (5) is divided into three stages, namely 120 ℃ to 140 ℃ to 180 ℃ and the pulling speed in the step (6) is 3m/min.
Examples 6 to 7
A degradable fan blade has a formula different from that of the degradable fan blade in example 3, and the components and the corresponding mass percentages are shown in Table 2.
Table 2 the components and mass percentages thereof in examples 3 to 7
Example 8
A composite pultruded panel differs from example 3 in that the raw materials for the fibers in the formulation are glass fibers purchased from SUD1240, a Taishan glass fiber Co.
Comparative example 3
A composite pultruded panel, different from example 3 in that the mass of degradable epoxy in the above step was replaced with a common epoxy.
Performance test
Test sample: the composite pultruded panels obtained in examples 3-8 were used and numbered in sequence as test samples 1-6, and the composite pultruded panel obtained in comparative example 3 was used as control sample 1.
The evaluation method comprises the following steps: and (3) weighing the test pultruded plate, cutting the test pultruded plate into a proper size, carrying out resin degradation operation (the degradation effect is achieved by combining an amino group with an acetoacetate group in a degradable modified resin formula I into a dynamic enamine bond), obtaining a recovery liquid and a solid recovery material (containing filler and fiber) after the degradation is finished, weighing the weight of the total solid recovery material, and calculating to obtain a solid recovery ratio. The calculation formula is that the solid recovery ratio= (original plate weight-recovered solid weight)/original plate weight, and the theoretical solid duty ratio is compared with the actual recovery duty ratio, so that the separation rate is obtained. Separation rate (%) =1- ((actual recovery ratio-theoretical composite ratio)/theoretical resin ratio)) =100%
The analysis results are shown in Table 3.
TABLE 3 test results for test samples 1-6 and control sample 1
| Sample of | Theoretical composite material ratio (%) | Actual recovery of solids ratio (%) | Separation Rate (%) |
| Test sample 1 | 64 | 64 | 100 |
| Test sample 2 | 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 |
| Control sample 1 | 64 | 96 | 11 |
As can be seen from the combination of examples 3, 5 and comparative example 3 in combination with table 3, the use of the novel degradable resin in place of the main stream resin produced composite pultruded panels can achieve 100% separation, meaning that the resins in the panels can be fully degraded and recycled by this method and reused.
It can be seen from the combination of examples 3 and examples 4-7 and Table 3 that different ratios of the auxiliary materials are matched to effectively degrade and separate, and the separation rate is at least 90%.
It can be seen in combination with examples 3 and 8 and with Table 3 that the separation rate can also reach 97% in the glass fiber composite system, indicating good recyclability of either carbon fiber or glass fiber.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to be limiting in any way and in nature, and it should be noted that several modifications and additions may be made to those skilled in the art without departing from the invention, which modifications and additions are also intended to be construed as within the scope of the invention.
Claims (9)
1. The degradable pultruded panel composite material is characterized by comprising the following components in percentage by mass:
18-50% of a degradable epoxy resin composition;
50-80% of fiber raw materials;
1-5% of a release agent;
0-10% filler, but not 0;
the degradable epoxy resin composition contains a degradable modified resin shown in a formula I:
wherein n in formula I is a natural number;
the degradable epoxy resin composition comprises the following components in percentage by mass:
epoxy BE 188%;
8% of degradable modified resin shown in a formula I;
the anhydride curing agent MTHPA is 105% of the sum of the two resins;
or comprises the following components in percentage by mass:
epoxy BE 188%;
a degradable modified resin 16% as shown in formula I;
the anhydride curing agent MTHPA is 105% of the sum of the two resins;
the degradable epoxy resin composition has 1760-1710cm in infrared spectrum analysis -1 Characteristic peaks.
2. The degradable pultruded panel composite of 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.
3. The degradable pultruded panel composite of claim 1, wherein the degradable pultruded panel composite is capable of thermal degradation with amine compounds under alkaline conditions to separate fibers.
4. A degradable pultruded panel composite according to claim 3, characterized in that the temperature range of the thermal degradation is 80-200 ℃ for 1-48 hours.
5. Use of the degradable pultruded panel composite material according to any of claims 1-4 in a wind power blade girder.
6. A degradable wind power blade girder, which is characterized in that the preparation raw materials comprise the degradable pultruded panel composite material according to any one of claims 1 to 4.
7. The method for preparing the degradable wind power blade girder as claimed in claim 6, comprising the following steps:
step 1: preparing a degradable resin composition, a release agent and a filler into an epoxy resin glue solution;
step 2: leading out the fiber raw materials arranged on the creel from the creel and arranging the fiber raw materials in order;
step 3: uniformly impregnating the orderly arranged fiber raw materials with the epoxy resin glue solution obtained in the step 1, wherein the uniformity of the fibers must be ensured in the impregnation process;
step 4: the pre-impregnated fiber raw materials pass through a pre-forming device to run in a continuous mode, ensure the corresponding positions of the pre-impregnated fiber raw materials, gradually overreach the shape of a plate material through the pre-forming device, simultaneously extrude redundant resin, then enter a die and carry out forming and curing;
step 5: the impregnated fiber raw material in the shape of a plate enters a mould to be solidified and molded in the mould;
step 6: the cured sheet is pulled from the die using a pulling device and cut to the desired length as desired.
8. The method for preparing the degradable wind power blade girder according to claim 7, wherein the curing and molding in the step 5 is divided into three stages, and curing temperatures of the three stages are respectively: 100-120 ℃, 140-160 ℃ and 180-210 ℃; the pulling speed of the traction device in the step 6 is 1-3m/min.
9. A degradable epoxy resin composition, which is characterized by comprising the following components in percentage by mass:
epoxy BE 188%;
8% of degradable modified resin shown in a formula I;
the anhydride curing agent MTHPA is 105% of the sum of the two resins;
or comprises the following components in percentage by mass:
epoxy BE 188%;
a degradable modified resin 16% as shown in formula I;
the anhydride curing agent MTHPA is 105% of the sum of the two resins;
the degradable epoxy resin composition has 1760-1710cm in infrared spectrum analysis -1 Characteristic peaks;
wherein n in 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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| 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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| CN114891317B true CN114891317B (en) | 2023-12-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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