CN117069987B - Carbon fiber prepreg and preparation method thereof - Google Patents
Carbon fiber prepreg and preparation method thereof Download PDFInfo
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- CN117069987B CN117069987B CN202311337155.XA CN202311337155A CN117069987B CN 117069987 B CN117069987 B CN 117069987B CN 202311337155 A CN202311337155 A CN 202311337155A CN 117069987 B CN117069987 B CN 117069987B
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 52
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 51
- 238000002360 preparation method Methods 0.000 title claims description 6
- 239000011159 matrix material Substances 0.000 claims abstract description 28
- 229920005989 resin Polymers 0.000 claims abstract description 28
- 239000011347 resin Substances 0.000 claims abstract description 28
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims abstract description 20
- 239000003822 epoxy resin Substances 0.000 claims abstract description 12
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 12
- 239000004642 Polyimide Substances 0.000 claims abstract description 8
- 229920001721 polyimide Polymers 0.000 claims abstract description 8
- 229920001083 polybutene Polymers 0.000 claims abstract description 7
- GYZLOYUZLJXAJU-UHFFFAOYSA-N diglycidyl ether Chemical compound C1OC1COCC1CO1 GYZLOYUZLJXAJU-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 15
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 150000001412 amines Chemical class 0.000 claims description 12
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Natural products CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 9
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 8
- 235000019441 ethanol Nutrition 0.000 claims description 7
- -1 perfluorohexyl ethyl Chemical group 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 7
- 150000001875 compounds Chemical class 0.000 claims description 6
- 235000021355 Stearic acid Nutrition 0.000 claims description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 5
- 239000008117 stearic acid Substances 0.000 claims description 5
- VILCJCGEZXAXTO-UHFFFAOYSA-N 2,2,2-tetramine Chemical compound NCCNCCNCCN VILCJCGEZXAXTO-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 3
- 229910017604 nitric acid Inorganic materials 0.000 claims description 3
- 230000001590 oxidative effect Effects 0.000 claims description 3
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 3
- RPNUMPOLZDHAAY-UHFFFAOYSA-N Diethylenetriamine Chemical compound NCCNCCN RPNUMPOLZDHAAY-UHFFFAOYSA-N 0.000 claims description 2
- 239000004842 bisphenol F epoxy resin Substances 0.000 claims description 2
- 239000002121 nanofiber Substances 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 description 14
- 239000000835 fiber Substances 0.000 description 10
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 229960001124 trientine Drugs 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 235000015842 Hesperis Nutrition 0.000 description 1
- 235000012633 Iberis amara Nutrition 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- RYYKJJJTJZKILX-UHFFFAOYSA-M sodium octadecanoate Chemical compound [Na+].CCCCCCCCCCCCCCCCCC([O-])=O RYYKJJJTJZKILX-UHFFFAOYSA-M 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- C08J5/24—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs
- C08J5/248—Impregnating materials with prepolymers which can be polymerised in situ, e.g. manufacture of prepregs using pre-treated fibres
-
- 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- 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
- C08J2479/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2461/00 - C08J2477/00
- C08J2479/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2479/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
-
- 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
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- 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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (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 provides a carbon fiber prepreg, which is added with heat conduction filler nano Al 2 O 3 The thermal conductivity is improved, the resin matrix comprises glycidyl ether type epoxy resin, epoxidized polybutene and polyimide, and the mixed resin matrix can improve the comprehensive mechanical property of the matrix; the carbon fiber after oxidation treatment can be better combined with the resin matrix, and the comprehensive performance of the prepreg is improved.
Description
Technical Field
The invention belongs to the technical field of carbon fiber composite materials, and particularly relates to a carbon fiber prepreg and a preparation method thereof.
Background
The carbon fiber prepreg is a composite material processed by carbon fiber or fabric thereof through an impregnation process under certain conditions, has the characteristics of high strength and good plasticity, is widely applied to the fields of fishing tackle, sports equipment, automobiles or aerospace, and is also an important structural material in the field of manufacturing military products such as rockets, missiles and satellites. The carbon fiber reinforced epoxy resin prepreg is an intermediate product of a carbon fiber reinforced epoxy resin matrix composite material, and the performance of the carbon fiber reinforced epoxy resin matrix composite material is directly influenced by the performance of the composite material, so that the carbon fiber reinforced epoxy resin prepreg is very important to the research on a resin matrix formula and a prepreg processing technology in the prepreg production process. In recent years, due to the rapid development of high-frequency and high-integration electronic equipment and the process technology of parts thereof, the requirements on the heat conduction and high-temperature resistance of materials are greatly improved, however, the currently used resin-based composite materials generally have relatively low heat conductivity, heat aggregation is easy to generate, and the requirements on the high-frequency and high-integration development of the electronic information age are more and more difficult to adapt. In addition, the fiber reinforced epoxy resin matrix composite material is easy to crack and delaminate under low-speed impact, so that the application field of the fiber reinforced epoxy resin matrix composite material is limited, and therefore, how to improve the heat conduction performance and the mechanical property of the carbon fiber prepreg becomes a problem to be solved.
Disclosure of Invention
In view of the above, the present invention aims to provide a carbon fiber prepreg and a preparation method thereof, so as to solve the above problems.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a method for preparing a carbon fiber prepreg, the method comprising the steps of:
1) Nano Al with stearic acid 2 O 3 Modifying to obtain modified nanometer Al 2 O 3 ；
2) Dissolving resin matrix, amine curing agent and perfluorohexyl ethyl alcohol in tetrahydrofuran, and adding modified nano Al 2 O 3 Uniformly stirring to obtain an impregnating compound, wherein the resin matrix comprises 30-60:5-8:10-20 parts by weight of glycidyl ether type epoxy resin, epoxidized polybutene and polyimide;
3) Oxidizing the carbon fiber by nitric acid to obtain modified carbon fiber;
4) And immersing the modified carbon fiber into the impregnating material to obtain the carbon fiber prepreg.
Further, stearic acid and nano Al 2 O 3 The adding mass ratio is 0.1% -5%.
Further, nanometer Al 2 O 3 Is alumina nanometer fiber with diameter of 4-8nm, length of 200-300nm and purity of 99%.
Further, the amine curing agent is one or more of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, T31 and 593.
Further, the glycidyl ether type epoxy resin is bisphenol a epoxy resin or bisphenol F epoxy resin.
Further, the bisphenol A epoxy resin was E-44.
Further, the impregnating compound comprises the following raw materials in parts by weight: 80-100 parts of resin matrix, 20-40 parts of amine curing agent, 1-10 parts of perfluorohexyl ethyl alcohol, 60-90 parts of tetrahydrofuran and modified nano Al 2 O 3 1-5 parts.
The invention also provides the carbon fiber prepreg prepared by the method.
Compared with the prior art, the carbon fiber prepreg and the preparation method thereof have the following advantages:
the carbon fiber prepreg of the invention is added with the heat conduction filler nano Al 2 O 3 The thermal conductivity is improved, the resin matrix comprises glycidyl ether type epoxy resin, epoxidized polybutene and polyimide, and the mixed resin matrix can improve the comprehensive mechanical property of the matrix; the carbon fiber after oxidation treatment can be better combined with the resin matrix, and the comprehensive performance of the prepreg is improved.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The present invention will be described in detail with reference to examples.
Example 1
A method for preparing a carbon fiber prepreg, the method comprising the steps of:
1) Modified nano Al 2 O 3
Weighing sodium stearate, placing into a three-neck flask, adding n-butanol, dissolving with ultrasound, and adding nanometer Al 2 O 3 And ultrasonic oscillation, stearic acid and nano Al 2 O 3 The adding mass ratio is 1%, nano Al 2 O 3 Is commercially available alumina nanometer fiber with the diameter of 4-8nm, the length of 200-300nm and the purity of 99%; placing the three-neck flask in an electric heating sleeve, vigorously stirring and heatingTo a constant boiling point, the hot vapor produced by the condenser immediately following that heating is condensed, the condensate separates the n-butanol from the water by a separator, the water exits the system, and the n-butanol is refluxed again. And when the steam temperature reaches the boiling point of n-butanol, keeping the temperature for 3 hours, and stopping heating. Cooling to room temperature, filtering with vacuum pump, washing with absolute ethanol, dispersing solid after solid-liquid separation into absolute ethanol, stirring, and repeatedly washing for 3-5 times. Finally, the obtained modified nano Al 2 O 3 And (5) drying.
2) 80 parts of resin matrix, 25 parts of amine curing agent, 4 parts of perfluorohexyl ethyl alcohol are dissolved in 75 parts of tetrahydrofuran, and 2 parts of modified nano Al are added 2 O 3 Uniformly stirring to obtain an impregnating compound, wherein the resin matrix comprises bisphenol A epoxy resin E-44, epoxidized polybutene and polyimide in a mass ratio of 40:5:12, and the amine curing agent comprises triethylene tetramine and T31 in a mass ratio of 2:1.
3) Modified carbon fiber
Placing the carbon fiber into a Soxhlet extractor filled with acetone, extracting by using acetone, removing sizing agent and impurities on the surface of the carbon fiber, and drying the cleaned carbon fiber in a blast drying oven at 60 ℃ to obtain the cleaned carbon fiber; soaking the dried carbon fiber in 68% nitric acid, and oxidizing at 80deg.C for 3 hr; and immersing the oxidized carbon fiber in distilled water for 10min, taking out, repeating for 8 times to obtain the cleaned oxidized carbon fiber, and drying.
4) The modified carbon fiber is immersed in the impregnating material at 110 ℃ for 5 hours, and then dried at 60 ℃ for 4 hours, so as to prepare the carbon fiber prepreg.
The mass fraction of the resin of the prepared carbon fiber prepreg is 30 percent, and the fiber surface density is 145.38 g.m -2 。
Example 2
A method for preparing a carbon fiber prepreg, the method comprising the steps of:
1) Modified nano Al 2 O 3 (example 1)
2) 100 parts of resin matrix, 40 parts of amine curing agent, 9 parts of perfluorohexyl ethyl alcohol are dissolved in 90 parts of tetrahydrofuran, and 5 parts of modified nano-meter are addedAl 2 O 3 Uniformly stirring to obtain an impregnating compound, wherein the resin matrix comprises bisphenol A epoxy resin E-44, epoxidized polybutene and polyimide in a mass part ratio of 55:8:19, and the amine curing agent comprises triethylene tetramine and 593 in a mass part ratio of 3:1;
3) Modified carbon fiber (example 1)
4) The modified carbon fiber is immersed in the impregnating material at 120 ℃ for 4 hours, and then dried at 60 ℃ for 4 hours, so as to prepare the carbon fiber prepreg.
The mass fraction of the resin of the prepared carbon fiber prepreg is 28 percent, and the fiber surface density is 143.61 g.m -2 。
Example 3
A method for preparing a carbon fiber prepreg, the method comprising the steps of:
1) Modified nano Al 2 O 3 (example 1)
2) 90 parts of resin matrix, 32 parts of amine curing agent and 7 parts of perfluorohexyl ethyl alcohol are dissolved in 85 parts of tetrahydrofuran, and 3.5 parts of modified nano Al is added 2 O 3 Uniformly stirring to obtain an impregnating compound, wherein the resin matrix comprises bisphenol A epoxy resin E-44, epoxidized polybutene and polyimide in a mass part ratio of 45:6:14, and the amine curing agent comprises tetraethylenepentamine and T31 in a mass part ratio of 2:1;
3) Modified carbon fiber (example 1)
4) The modified carbon fiber is immersed in the impregnating material at 110 ℃ for 4 hours, and then dried at 60 ℃ for 4 hours, so as to prepare the carbon fiber prepreg.
The mass fraction of the resin of the prepared carbon fiber prepreg is 31 percent, and the fiber surface density is 146.79 g.m -2 。
Comparative example 1
Based on example 1, nano Al 2 O 3 Is spherical nanometer particle with particle size of 10-30nm.
The mass fraction of the resin of the prepared carbon fiber prepreg is 23 percent, and the fiber surface density is 121.05 g.m -2 。
Comparative example 2
Based on example 1, the resin matrix was bisphenol A epoxy resin E-44.
The mass fraction of the resin of the prepared carbon fiber prepreg is 18 percent, and the fiber surface density is 106.42 g.m -2 。
Comparative example 3
In the embodiment 1, the resin matrix is polyimide.
The mass fraction of the resin of the prepared carbon fiber prepreg is 21 percent, and the fiber surface density is 102.66 g.m -2 。
Mechanical property test
The carbon fiber prepregs of each of the examples and comparative examples were prepared into composite unidirectional sheets, and the composite unidirectional sheets were tested for their tensile strength, tensile modulus, compressive strength, compressive modulus, flexural strength, flexural modulus, and layer shear strength.
Table 1 comparative table of properties of composite unidirectional sheets prepared from carbon fiber prepregs of examples and comparative examples
Thermal conductivity testing
And testing the thermal diffusion coefficient of the composite unidirectional plate by using a laser thermal conductivity analyzer, and after measuring the density, specific heat capacity and thermal diffusion coefficient of the unidirectional plates of different composite materials, calculating to obtain the thermal conductivity of the plate according to the following formula:
，
wherein k is a thermal conductivity, W.m -1 ·K -1 The method comprises the steps of carrying out a first treatment on the surface of the ρ is the density of the board, g/cm 3 ，C p J.g for specific heat capacity of plate -1 ·℃ -1 。
Table 2 comparative table of thermal conductivity coefficients of composite unidirectional sheets prepared from carbon fiber prepregs of examples and comparative examples
It can be found from tables 1 and 2 that the carbon fiber prepreg obtained by using the resin matrix of the invention has better heat conduction effect after adding the alumina nano fiber, and a composite unidirectional plate with better comprehensive mechanical properties can be obtained.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (5)
1. A preparation method of carbon fiber prepreg is characterized in that: the method comprises the following steps:
1) Nano Al with stearic acid 2 O 3 Modifying to obtain modified nanometer Al 2 O 3 ；
2) Dissolving resin matrix, amine curing agent and perfluorohexyl ethyl alcohol in tetrahydrofuran, and adding modified nano Al 2 O 3 Uniformly stirring to obtain an impregnating compound, wherein the resin matrix comprises 30-60:5-8:10-20 parts by weight of glycidyl ether type epoxy resin, epoxidized polybutene and polyimide;
3) Oxidizing the carbon fiber by nitric acid to obtain modified carbon fiber;
4) Immersing the modified carbon fiber into the impregnating material to prepare a carbon fiber prepreg;
wherein, stearic acid and nano Al 2 O 3 The adding mass ratio is 0.1% -5%;
nano Al 2 O 3 The alumina nano fiber has the diameter of 4-8nm, the length of 200-300nm and the purity of 99%;
the impregnating material comprises the following raw materials in parts by weight: 80-100 parts of resin matrix, 20-40 parts of amine curing agent, 1-10 parts of perfluorohexyl ethyl alcohol, 60-90 parts of tetrahydrofuran and modified nano Al 2 O 3 1-5 parts.
2. The method for producing a carbon fiber prepreg according to claim 1, wherein: the amine curing agent is one or more of diethylenetriamine, triethylenetetramine, tetraethylenepentamine, T31 and 593.
3. The method for producing a carbon fiber prepreg according to claim 1, wherein: the glycidyl ether type epoxy resin is bisphenol A epoxy resin or bisphenol F epoxy resin.
4. A method of preparing a carbon fiber prepreg according to claim 3, wherein: bisphenol A epoxy resin is E-44.
5. A carbon fiber prepreg prepared by the method of any one of claims 1-4.
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| CN117069987A (en) | 2023-11-17 |
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