CN113956615A - High-compression-strength glass fiber composite material and preparation method thereof - Google Patents
High-compression-strength glass fiber composite material and preparation method thereof Download PDFInfo
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- 239000003365 glass fiber Substances 0.000 title claims abstract description 90
- 239000002131 composite material Substances 0.000 title claims abstract description 81
- 238000002360 preparation method Methods 0.000 title abstract description 24
- 239000003822 epoxy resin Substances 0.000 claims abstract description 40
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 40
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 34
- 239000007822 coupling agent Substances 0.000 claims abstract description 25
- 239000011259 mixed solution Substances 0.000 claims description 56
- 238000003756 stirring Methods 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 13
- MWSKJDNQKGCKPA-UHFFFAOYSA-N 6-methyl-3a,4,5,7a-tetrahydro-2-benzofuran-1,3-dione Chemical group C1CC(C)=CC2C(=O)OC(=O)C12 MWSKJDNQKGCKPA-UHFFFAOYSA-N 0.000 claims description 10
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims description 6
- 150000008065 acid anhydrides Chemical class 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000011152 fibreglass Substances 0.000 claims 3
- 150000008064 anhydrides Chemical group 0.000 claims 1
- 230000006835 compression Effects 0.000 abstract description 11
- 238000007906 compression Methods 0.000 abstract description 11
- 230000001105 regulatory effect Effects 0.000 abstract description 3
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 27
- 230000008569 process Effects 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 238000011417 postcuring Methods 0.000 description 12
- 238000012545 processing Methods 0.000 description 12
- 239000006087 Silane Coupling Agent Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 4
- 239000011159 matrix material Substances 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229930185605 Bisphenol Natural products 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000006872 improvement Effects 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
- 239000002994 raw material Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/043—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with glass fibres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
- C08J2363/02—Polyglycidyl ethers of bis-phenols
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5435—Silicon-containing compounds containing oxygen containing oxygen in a ring
-
- 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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a glass fiber composite material with high compressive strength and a preparation method thereof. The glass fiber composite material is prepared from epoxy resin, a coupling agent, a curing agent and glass fiber; the mass ratio of the epoxy resin to the glass fiber is 1: 1.5-2.5. The glass fiber composite material prepared by the invention has high compression strength, can be applied to important fields, has simple preparation process, and can be used for forming large-size composite material members; meanwhile, the regulation and control of different compression performances are realized by combining the type and the content of the coupling agent, and the purpose of regulating the compression performance of the glass fiber composite material is achieved.
Description
Technical Field
The invention relates to the technical field of polymer composite materials, in particular to a glass fiber composite material with high compressive strength and a preparation method thereof.
Background
The polymer-based composite material has become a rapidly developed material system in the field of wind power due to excellent mechanical properties. With the improvement of wind power technology, the development of hectometer-level blades becomes the key for improving the wind power generation efficiency, the larger the size of the blades is, the higher and higher the requirement on the material performance is inevitable, the performance of the used glass fiber reinforced material is generally fixed, but the failure position of most of composite materials is in the interface combination position of a resin matrix and a fiber material, so that the development of effective glass fiber composite materials with high compressive strength has important significance.
The wind power generation blade mainly comprises glass fiber, a resin matrix and the like, and the preparation method of the glass fiber composite material in the prior art has the problems of complex process, low compressive strength and difficulty in forming large-size complex glass fiber composite material components, for example, CN201811199009.4 develops the design of the composite material matrix and combines various processes, but the patent is also difficult to form the large-size complex composite material components and has the problems of low strength and high density.
In summary, the current preparation method of the glass fiber composite material mainly has the following problems: (1) the compression strength is low, and the application to important fields is difficult; (2) the preparation process is complex, and large-size composite material components and the like are difficult to mold.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a glass fiber composite material with high compressive strength and a preparation method thereof. The composite material has high compression strength, can be applied to important fields, has simple preparation process, and can form large-size composite material members; meanwhile, the regulation and control of different compression performances are realized by combining the type and the content of the coupling agent, and the purpose of regulating the compression performance of the glass fiber composite material is achieved.
The technical scheme of the invention is as follows:
the glass fiber composite material with high compressive strength is prepared from epoxy resin, a coupling agent, a curing agent and glass fibers; the mass ratio of the epoxy resin to the glass fiber is 1: 1.5-2.5.
Further, the epoxy resin is bisphenol A type epoxy resin, and the bisphenol A type epoxy resin is one or more of 128 epoxy resin, E51 epoxy resin and 127 epoxy resin.
Further, the coupling agent is a Michael diagram A-187 or A-174.
Further, the mass ratio of the epoxy resin to the coupling agent is 10: 0.1-1.
Further, the curing agent is acid anhydride or dicyandiamide; the acid anhydride is methyltetrahydrophthalic anhydride; the mass ratio of the epoxy resin to the curing agent is 10: 1-5.
Further, the linear density of the glass fiber is 2400Tex or 4800 Tex.
Further, the content of the epoxy resin in the glass fiber composite material is 30% +/-3%.
A preparation method of the glass fiber composite material comprises the following steps:
(1) mixing and stirring the epoxy resin and the coupling agent at 50-70 ℃, and cooling to obtain a mixed solution A;
(2) adding a curing agent into the mixed solution A prepared in the step (1), and stirring to obtain a mixed solution B;
(3) and (3) mixing the mixed solution B obtained in the step (2) with glass fibers, and performing pultrusion and cooling to obtain the glass fiber composite material.
Further, in the step (1) and the step (2), the stirring speed is both 300-.
Further, in the step (3), a pre-forming die and a pultrusion die are adopted for pultrusion; the pultrusion forming die comprises a preheating zone, a gel zone and a curing zone, three-stage gradient heating is adopted, the temperature of the three stages is 120 ℃, 140 ℃ and 170 ℃, the pultrusion speed is 0.1-0.3m/min, and the pulling force is 1-3 tons.
The beneficial technical effects of the invention are as follows:
(1) the composite material is prepared by taking the epoxy resin, the glass fiber, the curing agent and the coupling agent as raw materials, and the problems that the glass fiber composite material is low in compression strength, difficult to apply to important fields, complex in preparation process, difficult to mold large-size composite material components and the like are effectively solved on the basis of excellent interface performance between the epoxy resin and the glass fiber.
(2) According to the invention, by limiting the types and contents of the coupling agent, the regulation and control of different compression properties are realized, so that the purpose of regulating the compression properties of the glass fiber composite material is achieved, and the prepared composite material can be widely applied to the field of wind power generation blades with increasingly large sizes (the size and the length of the blade can reach 90m), and has a wide application prospect.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 0.5kg of silane coupling agent Michael diagram A-187 at 60 ℃ at 500r/min for 15min, mixing completely, and cooling to normal temperature to obtain a mixed solution A;
(2) adding 3kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 5 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 2
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 1kg of silane coupling agent Meiji A-187 at 60 ℃ at 500r/min for 15min, and cooling to normal temperature after completely mixing to obtain a mixed solution A;
(2) adding 3kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 5 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 3
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 1kg of silane coupling agent Meiji A-187 at 60 ℃ at 500r/min for 15min, and cooling to normal temperature after completely mixing to obtain a mixed solution A;
(2) adding 4kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 5 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 4
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 1kg of silane coupling agent Meiji A-187 at 60 ℃ at 500r/min for 15min, and cooling to normal temperature after completely mixing to obtain a mixed solution A;
(2) adding 3kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (4800Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 5 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 5
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 1kg of silane coupling agent Meiji A-187 at 60 ℃ at 500r/min for 15min, and cooling to normal temperature after completely mixing to obtain a mixed solution A;
(2) adding 3kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 3 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 6
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 1kg of silane coupling agent Meiji A-174 at 60 ℃ at 500r/min for 15min, and cooling to normal temperature after completely mixing to obtain a mixed solution A;
(2) adding 3kg of curing agent (dicyandiamide) into the mixed solution A obtained in the step (1), stirring for 15min at the normal temperature at the speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 3 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 7
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type E51 and 1kg of silane coupling agent Meiji A-174 at 50 ℃ for 15min at a speed of 500r/min, and cooling to normal temperature after complete mixing to obtain a mixed solution A;
(2) adding 1kg of curing agent (dicyandiamide) into the mixed solution A obtained in the step (1), stirring for 15min at the normal temperature at the speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 3 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Example 8
A glass fiber composite material with high compressive strength comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A128 and 1kg of silane coupling agent Mi graph A187 at 70 ℃ at 500r/min for 15min, and cooling to normal temperature after complete mixing to obtain a mixed solution A;
(2) adding 5kg of curing agent (dicyandiamide) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 3 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Comparative example 1
A glass fiber composite material comprises epoxy resin, glass fiber and a curing agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 at 60 ℃ for 15min at a speed of 500r/min, and cooling to normal temperature to obtain a mixed solution A;
(2) adding 3kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 3 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Comparative example 2
A glass fiber composite material comprises epoxy resin, glass fiber and a curing agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 at 60 ℃ for 15min at a speed of 500r/min, and cooling to normal temperature to obtain a mixed solution A;
(2) adding 4kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 5 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Comparative example 3
A glass fiber composite material comprises epoxy resin, glass fiber and a curing agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 at 60 ℃ for 15min at a speed of 500r/min, and cooling to normal temperature to obtain a mixed solution A;
(2) adding 3kg of curing agent (dicyandiamide) into the mixed solution A obtained in the step (1), stirring for 15min at the normal temperature at the speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (4800Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 3 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Comparative example 4
A glass fiber composite material comprises epoxy resin, glass fiber, a curing agent and a coupling agent; the preparation method of the composite material comprises the following steps:
(1) stirring 10kg of bisphenol A type 128 and 0.5kg of silane coupling agent KH-792 at 60 ℃ at 500r/min for 15min, mixing completely, and cooling to normal temperature to obtain mixed solution A;
(2) adding 3kg of curing agent (methyl tetrahydrophthalic anhydride) into the mixed solution A obtained in the step (1), stirring at normal temperature for 15min at a speed of 500r/min, and uniformly stirring to obtain mixed solution B;
(3) processing and producing the mixed solution B obtained in the step (2) and 22kg of glass fiber (2400Tex, purchased from Taishan glass fiber Co., Ltd.) by pultrusion equipment to prepare a glass fiber composite material with the thickness of 5 mm; the resin content is 30%; the pultrusion curing process adopts the temperature of 120 ℃, 140 ℃ and 170 ℃; the post-curing temperature was 180 ℃. The pultrusion speed is 0.3m/min and the pulling force is 2 tons.
Test example:
the products obtained in examples 1 to 8 and comparative examples 1 to 4 were subjected to a performance test, and the glass fiber composite was subjected to a test for compressive strength perpendicular to the fiber direction, and the compressive strength and modulus perpendicular to the fiber direction of the material were tested by a universal tester (instron 34TM-50) according to the ASTM D6641 standard. The test strengths are shown in table 1.
TABLE 1
As can be seen from Table 1, the glass fiber composite of the present invention has a high compressive strength. Compared with the examples 1 to 8, the dosage of the coupling agent is reduced in the comparative examples 1 to 3, the coupling agent is replaced in the comparative example 4, the compression strength of the composite material prepared in the comparative examples 1 to 4 is obviously reduced, and the composite material prepared by optimizing the coupling agent, the content and the like has better mechanical property.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The glass fiber composite material with high compressive strength is characterized by being prepared from epoxy resin, a coupling agent, a curing agent and glass fibers; the mass ratio of the epoxy resin to the glass fiber is 1: 1.5-2.5.
2. The fiberglass composite of claim 1, wherein the epoxy resin is a bisphenol a type epoxy resin, wherein the bisphenol a type epoxy resin is one or more of a 128 epoxy resin, an E51 epoxy resin, and a 127 epoxy resin.
3. The fiberglass composite of claim 1, wherein said coupling agent is magma a-187 or a-174.
4. The glass fiber composite material as claimed in claim 1, wherein the mass ratio of the epoxy resin to the coupling agent is 10: 0.1-1.
5. The fiberglass composite of claim 1, wherein the curing agent is an anhydride or dicyandiamide; the acid anhydride is methyltetrahydrophthalic anhydride; the mass ratio of the epoxy resin to the curing agent is 10: 1-5.
6. The glass fiber composite of claim 1, wherein the glass fibers have a linear density of 2400Tex or 4800 Tex.
7. The glass fiber composite according to claim 1, wherein the content of the epoxy resin in the glass fiber composite is 30% ± 3%.
8. A method for preparing a glass fiber composite according to any one of claims 1 to 7, comprising the steps of:
(1) mixing and stirring the epoxy resin and the coupling agent at 50-70 ℃, and cooling to obtain a mixed solution A;
(2) adding a curing agent into the mixed solution A prepared in the step (1), and stirring to obtain a mixed solution B;
(3) and (3) mixing the mixed solution B obtained in the step (2) with glass fibers, and performing pultrusion and cooling to obtain the glass fiber composite material.
9. The method as claimed in claim 8, wherein the stirring speed in step (1) and step (2) is 300-500r/min, and the stirring time is 10-20 min.
10. The method according to claim 8, wherein in the step (3), the pultrusion employs a preforming die and a pultrusion die; the pultrusion forming die comprises a preheating zone, a gel zone and a curing zone, three-stage gradient heating is adopted, the temperature of the three stages is 120 ℃, 140 ℃ and 170 ℃, the pultrusion speed is 0.1-0.3m/min, and the pulling force is 1-3 tons.
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| CN115216115A (en) * | 2022-08-26 | 2022-10-21 | 株洲时代新材料科技股份有限公司 | Glass fiber reinforced plastic winding part, preparation method and application |
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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 |
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| KR20030056495A (en) * | 2001-12-28 | 2003-07-04 | 주식회사 효성 | Epoxy resin compositions for mold transformer and method for manufacturing the same |
| CN102532806A (en) * | 2011-11-25 | 2012-07-04 | 南昌大学 | Method for preparing epoxy resin composite material through SMC process |
| CN110564110A (en) * | 2019-10-22 | 2019-12-13 | 惠柏新材料科技（上海）股份有限公司 | Epoxy resin composition and preparation method and application thereof |
| CN111663332A (en) * | 2020-06-05 | 2020-09-15 | 巨石集团有限公司 | Direct yarn impregnating compound for glass fiber multi-axial fabric and preparation method and application thereof |
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| CN115216115A (en) * | 2022-08-26 | 2022-10-21 | 株洲时代新材料科技股份有限公司 | Glass fiber reinforced plastic winding part, preparation method and application |
| CN115216115B (en) * | 2022-08-26 | 2023-12-01 | 株洲时代新材料科技股份有限公司 | Glass fiber reinforced plastic winding part, preparation method and application |
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