CN117945776A - Carbon fiber net tire plate and preparation method and application thereof - Google Patents
Carbon fiber net tire plate and preparation method and application thereof Download PDFInfo
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- CN117945776A CN117945776A CN202410069411.XA CN202410069411A CN117945776A CN 117945776 A CN117945776 A CN 117945776A CN 202410069411 A CN202410069411 A CN 202410069411A CN 117945776 A CN117945776 A CN 117945776A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 115
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 115
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000002131 composite material Substances 0.000 claims abstract description 33
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 31
- 239000005011 phenolic resin Substances 0.000 claims abstract description 31
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 31
- 239000010426 asphalt Substances 0.000 claims abstract description 26
- 238000000967 suction filtration Methods 0.000 claims abstract description 23
- 239000002270 dispersing agent Substances 0.000 claims abstract description 22
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 238000005470 impregnation Methods 0.000 claims abstract description 18
- 238000000280 densification Methods 0.000 claims abstract description 16
- 238000005087 graphitization Methods 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 238000003763 carbonization Methods 0.000 claims abstract description 10
- 238000007711 solidification Methods 0.000 claims abstract description 8
- 230000008023 solidification Effects 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 7
- 239000000243 solution Substances 0.000 claims description 40
- 238000000034 method Methods 0.000 claims description 27
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 13
- 229920000609 methyl cellulose Polymers 0.000 claims description 13
- 239000001923 methylcellulose Substances 0.000 claims description 13
- 235000010981 methylcellulose Nutrition 0.000 claims description 13
- 230000010355 oscillation Effects 0.000 claims description 11
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 10
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 10
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 10
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims description 3
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 2
- 229920005989 resin Polymers 0.000 abstract description 10
- 239000011347 resin Substances 0.000 abstract description 10
- 230000002787 reinforcement Effects 0.000 abstract description 4
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000003575 carbonaceous material Substances 0.000 abstract description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 229910052799 carbon Inorganic materials 0.000 description 9
- 239000011148 porous material Substances 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 239000000835 fiber Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000007605 air drying Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- 238000010000 carbonizing Methods 0.000 description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 239000000809 air pollutant Substances 0.000 description 2
- 231100001243 air pollutant Toxicity 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
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- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- 230000000704 physical effect Effects 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012779 reinforcing material Substances 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003828 vacuum filtration Methods 0.000 description 1
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- Carbon And Carbon Compounds (AREA)
Abstract
The invention belongs to the technical field of composite carbon materials, and particularly relates to a carbon fiber net tire plate and a preparation method and application thereof. The preparation method of the carbon fiber mesh tire plate provided by the invention comprises the following steps: mixing short carbon fibers with a dispersing agent solution, and performing first vacuum suction filtration to obtain a tiled carbon fiber bundle; pouring phenolic resin solution on the tiled carbon fiber bundles, and sequentially carrying out impregnation, second vacuum suction filtration and drying to obtain a composite carbon fiber substrate; and sequentially carrying out solidification, carbonization, asphalt impregnation densification and graphitization on the composite carbon fiber substrate to obtain the carbon fiber net tyre plate. According to the invention, vacuum suction filtration is used for preparing the carbon fiber composite material, and carbon fiber dispersion and resin reinforcement are sequentially carried out, so that the strength of the board is not reduced due to mechanical damage to the carbon fiber, and the phenolic resin solution can fully and rapidly infiltrate and impregnate the reinforced material, and the obtained carbon fiber net board has high tensile strength, light weight, high rigidity and good heat resistance.
Description
Technical Field
The invention belongs to the technical field of composite carbon materials, and particularly relates to a carbon fiber net tire plate and a preparation method and application thereof.
Background
Carbon Fiber (CF) is a novel Fiber material with Carbon content of more than 90% and high specific strength, high specific modulus, good conductivity, high temperature resistance and corrosion resistance. The carbon fiber reinforced resin matrix composite refers to a generic term for composite materials in which carbon fibers are used as reinforcements and resins are used as matrices. In the past 60 years, carbon fiber and resin matrix composite materials thereof have been widely applied to the fields of aerospace, military industry, sports and leisure and the like due to excellent mechanical properties and chemical stability, and are novel strategic materials with great development potential in the future.
The existing carbon/carbon composite material is mainly prepared by densifying a carbon fiber bundle needled preformed body or a carbon fiber cloth prepreg laminated preformed body, wherein a plurality of pores with different sizes exist in the needled preformed body, the surface layer pores are easy to be filled firstly in the densification process, and the fine pores in the inner part are difficult to be filled and compacted, so that the density uniformity of a finished product is poor, and the mechanical property is influenced; the finished product of the material formed by the preform has higher tensile strength, but has poor interlayer bonding property, and is easy to have layering problem in the use process. Therefore, the carbon fiber net tire manufactured by the current net forming technology has larger difference of directional performance and shorter service life.
Disclosure of Invention
The invention aims to provide a carbon fiber net tire plate, and a preparation method and application thereof.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention provides a preparation method of a carbon fiber mesh tire plate, which comprises the following steps:
Mixing short carbon fibers with a dispersing agent solution, and performing first vacuum suction filtration to obtain a tiled carbon fiber bundle;
Pouring phenolic resin solution on the tiled carbon fiber bundles, and sequentially carrying out impregnation, second vacuum suction filtration and drying to obtain a composite carbon fiber substrate;
And sequentially carrying out solidification, carbonization, asphalt impregnation densification and graphitization on the composite carbon fiber substrate to obtain the carbon fiber net tyre plate.
Preferably, the dispersant in the dispersant solution comprises one or more of methylcellulose, sodium carboxymethylcellulose and hydroxyethylcellulose.
Preferably, the mixing mode is ultrasonic oscillation;
The power of the ultrasonic oscillation is 200-500W, and the time is 5-15 min.
Preferably, the phenolic resin solution comprises a phenolic resin and an aqueous ethanol solution;
the mass ratio of the phenolic resin to the ethanol aqueous solution is 6-8: 4 to 6.
Preferably, the curing comprises pre-curing and deep curing performed sequentially;
the pre-curing temperature is 50-80 ℃ and the pre-curing time is 10-15 h;
the temperature of the deep solidification is 120-180 ℃ and the time is 1-3 h.
Preferably, the carbonization temperature is 950-1100 ℃ and the time is 80-90 h.
Preferably, the temperature of the asphalt impregnation densification is 150-220 ℃, the pressure is 27-29 kgf, and the dwell time is 1-1.5 h.
Preferably, the graphitization temperature is 1800-2300 ℃ and the graphitization time is 40-50 h.
The invention also provides the carbon fiber net tire plate obtained by the preparation method, wherein the density of the carbon fiber net tire plate is 1.4-1.6 g/cm 3, and the thickness is more than 5 mm.
The invention also provides application of the carbon fiber net tire plate in preparing tires.
The invention provides a preparation method of a carbon fiber mesh tire plate, which comprises the following steps: mixing short carbon fibers with a dispersing agent solution, and performing first vacuum suction filtration to obtain a tiled carbon fiber bundle; pouring phenolic resin solution on the tiled carbon fiber bundles, and sequentially carrying out impregnation, second vacuum suction filtration and drying to obtain a composite carbon fiber substrate; and sequentially carrying out solidification, carbonization, asphalt impregnation densification and graphitization on the composite carbon fiber substrate to obtain the carbon fiber net tyre plate. According to the invention, vacuum suction filtration is used for preparing the carbon fiber composite material, and the dispersion and resin reinforcement of the carbon fibers are sequentially carried out, so that the strength of the plate is not reduced due to mechanical damage to the carbon fibers, and the phenolic resin solution can fully and rapidly infiltrate and impregnate the reinforced material. The preparation method provided by the invention can obtain the net tire plate with high tensile strength, uniform mechanical properties in all directions, light weight, large rigidity and good heat resistance.
In addition, in the phenolic resin compounding process, volatile matters and toxic air pollutants are fixed in the phenolic resin, so that the phenolic resin hardly causes pollution to the environment, and the preparation method has the advantages of high reaction speed, good process controllability, environmental protection, low cost and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram of a mixture of short carbon fibers and a dispersant solution in the preparation method provided by the invention;
fig. 2 is a surface physical diagram of a carbon fiber bundle tiled in the preparation method provided by the invention.
Detailed Description
The invention provides a preparation method of a carbon fiber mesh tire plate, which comprises the following steps:
Mixing short carbon fibers with a dispersing agent solution, and performing first vacuum suction filtration to obtain a tiled carbon fiber bundle;
Pouring phenolic resin solution on the tiled carbon fiber bundles, and sequentially carrying out impregnation, second vacuum suction filtration and drying to obtain a composite carbon fiber substrate;
And sequentially carrying out solidification, carbonization, asphalt impregnation densification and graphitization on the composite carbon fiber substrate to obtain the carbon fiber net tyre plate.
In the present invention, all raw material components are commercially available products well known to those skilled in the art unless specified otherwise.
According to the invention, short carbon fibers and a dispersing agent solution are mixed, and first vacuum suction filtration is carried out to obtain a tiled carbon fiber bundle.
In the present invention, the length of the short carbon fibers is preferably 10 to 60mm, more preferably 20 to 50mm, and most preferably 30 to 40mm.
In the present invention, the dispersant in the dispersant solution preferably includes one or more of methylcellulose, sodium carboxymethylcellulose, and hydroxyethylcellulose, more preferably methylcellulose and/or sodium carboxymethylcellulose; when the dispersant is methyl cellulose and sodium carboxymethyl cellulose, the mass percentage of methyl cellulose in the dispersant solution is preferably 0.4-1.2%, more preferably 0.4-1%, and most preferably 0.5-0.8%; the mass percentage of sodium carboxymethyl cellulose in the dispersant solution is preferably 0.4-1.2%, more preferably 0.6-1.2%, and most preferably 0.8-1.2%; the mass ratio of the methyl cellulose to the sodium carboxymethyl cellulose is preferably 1-3:2-7, more preferably 1-2:2-5, and most preferably 1:2; the solvent of the dispersant solution is preferably water.
In the present invention, the mass ratio of the short carbon fibers to the dispersant solution is preferably 1:1000 to 2000, more preferably 1:1000 to 1500, and most preferably 1:1000.
In the present invention, the mass ratio of the short carbon fibers and the dispersant solution is limited to the above range, which has the effect of making the fibers in the cavity more uniform and reducing the porosity.
In the invention, the mixing mode is preferably ultrasonic oscillation; the power of the ultrasonic oscillation is preferably 200-500W, more preferably 200-400W, and most preferably 250-350W; the time is preferably 5 to 15 minutes, more preferably 10 to 15 minutes; the temperature is preferably 38 to 44 ℃, more preferably 38 to 41 ℃; the ultrasonic vibration preferably comprises stirring; the stirring process is not particularly limited, and may be performed in a manner well known to those skilled in the art.
In the present invention, the first suction filtration device is preferably a buchner funnel and a vacuum pump; the first suction filtration process is not particularly limited in the present invention, and the pressure may be brought to a negative pressure by a method well known to those skilled in the art.
After the tiled carbon fiber bundles are obtained, phenolic resin solution is poured on the tiled carbon fiber bundles, and dipping, second vacuum suction filtration and drying are sequentially carried out, so that the composite carbon fiber substrate is obtained.
In the present invention, the phenolic resin solution preferably includes a phenolic resin and an aqueous ethanol solution; the volume percentage of the ethanol in the ethanol water solution is preferably 94.8-95%, more preferably 94.9-95%, and most preferably 95%; the mass ratio of the phenolic resin to the ethanol aqueous solution is preferably 6-8: 4 to 6, more preferably 6 to 7:4 to 5; the viscosity of the phenolic resin solution at 25℃is preferably 300 to 2000MPa s, more preferably 500 to 1500MPa s, most preferably 800 to 1200MPa s.
In the present invention, the time of the impregnation is preferably 11.5 to 12.5 hours, more preferably 12 to 12.5 hours, and most preferably 12.5 hours.
In the present invention, the second suction filtration device is preferably a buchner funnel and a vacuum pump; the second suction filtration process is not particularly limited in the present invention, and the pressure may be brought to a negative pressure by a method well known to those skilled in the art.
In the present invention, the drying is preferably air drying; the air-drying process is not particularly limited in the present invention, and may be performed in a manner well known to those skilled in the art.
After the composite carbon fiber substrate is obtained, the composite carbon fiber substrate is sequentially subjected to solidification, carbonization, asphalt impregnation densification and graphitization to obtain the carbon fiber net tyre plate.
In the present invention, the curing preferably includes pre-curing and deep curing which are sequentially performed; the temperature of the pre-curing is preferably 50-80 ℃, more preferably 60-80 ℃, and most preferably 70-80 ℃; the time is preferably 10 to 15 hours, more preferably 11 to 14 hours, most preferably 12 to 13 hours; the temperature of the deep curing is preferably 120-180 ℃, more preferably 130-170 ℃, and most preferably 140-160 ℃; the time is preferably 1 to 3 hours, more preferably 2 to 3 hours; the curing apparatus is preferably an oven.
In the present invention, the carbonization temperature is preferably 950 to 1100 ℃, more preferably 950 to 1050 ℃, and most preferably 950 to 1000 ℃; the time is preferably 80 to 90 hours, more preferably 85 to 90 hours; the carbonization device is preferably a vacuum carbon tube furnace.
In the present invention, the temperature of the asphalt impregnation densification is preferably 150 to 220 ℃, more preferably 170 to 220 ℃, and most preferably 200 to 220 ℃; the pressure is preferably 27 to 29kgf, more preferably 28 to 29kgf, most preferably 29kgf; the dwell time is preferably 1 to 1.5 hours, more preferably 1.2 to 1.5 hours, most preferably 1.5 hours; the asphalt impregnation densification equipment is preferably a vacuum impregnation furnace; the asphalt is impregnated and densified and then preferably cooled; the process of cooling is not particularly limited in the present invention, and asphalt may be hardened in a manner well known to those skilled in the art.
In the present invention, the graphitization temperature is preferably 1800 to 2300 ℃, more preferably 1800 to 2100 ℃, and most preferably 1800 to 2000 ℃; the time is preferably 40 to 50 hours, more preferably 42 to 48 hours, most preferably 45 to 48 hours; the graphitization apparatus is preferably a high temperature furnace.
According to the preparation method provided by the invention, vacuum suction filtration is used for preparing the carbon fiber composite material, and the dispersion and resin reinforcement of carbon fibers are sequentially carried out, so that the strength of the plate is not reduced due to mechanical damage to the carbon fibers, and the phenolic resin solution can fully and rapidly infiltrate and impregnate the reinforcing material, so that the obtained net tire plate has high tensile strength, uniform mechanical properties in all directions, light weight, high rigidity and good heat resistance. In addition, in the phenolic resin compounding process, volatile matters and toxic air pollutants are fixed in the phenolic resin, so that the phenolic resin hardly causes pollution to the environment, and the preparation method has the advantages of high reaction speed, good process controllability, environmental protection, low cost and the like.
The invention also provides the carbon fiber mesh tire plate obtained by the preparation method in the technical scheme, wherein the density of the carbon fiber mesh tire plate is 1.4-1.6 g/cm 3, preferably 1.5-1.6 g/cm 3, and more preferably 1.5g/cm 3; the thickness is 5mm or more, preferably 5 to 5.5mm, more preferably 5mm.
The invention also provides application of the carbon fiber net tire plate in preparing tires.
The invention is not particularly limited in the application of the carbon fiber web tire plate in the preparation of tires, and the method is well known to those skilled in the art.
For further explanation of the present invention, the carbon fiber net tire plate, the preparation method and application thereof provided by the present invention are described in detail below with reference to the accompanying drawings and examples, but they should not be construed as limiting the scope of the present invention.
Example 1
15T of water and 0.6 mass percent of Methyl Cellulose (MC) and 1.2 mass percent of sodium carboxymethyl cellulose (CMC) dispersant are added into a container. And (3) placing the weighed 15000g short carbon fibers with the length of 10mm into a container, fully immersing the short carbon fibers and slightly excessive short carbon fibers, carrying out ultrasonic oscillation for 10min under the power condition of 250W, stirring simultaneously, keeping the water temperature at 38 ℃, and dispersing the short carbon fibers by micro bubbles generated by microwave oscillation to tend to a monofilament state. Pouring the dispersed short carbon fibers into a buchner funnel which is vacuumized, and enabling the liquid in the buchner funnel to flow out along with the airflow through a vacuum pump, so that the short carbon fibers are deposited in the buchner funnel.
Mechanically mixing liquid phenolic resin and alcohol, wherein the mass ratio of the phenolic resin to the 95% alcohol is 6:4, the viscosity at 25 ℃ after mixing is 1000 MPa.s. Pouring the prepared resin into a mould, soaking for 12.5 hours, continuing suction filtration, enabling the solution to fully flow through the pores left after the fiber is formed, air-drying, demoulding and sampling to obtain the composite carbon fiber substrate.
And (3) placing the composite carbon fiber substrate in an oven to be pre-cured for 12 hours at 80 ℃, then deep curing for 2 hours at 160 ℃, and carbonizing the composite carbon fiber substrate in a vacuum carbon tube furnace at 950 ℃ for 84 hours. Impregnating the asphalt in a vacuum impregnating furnace, heating to 220 ℃ to reduce the viscosity of the asphalt, sucking all impregnating solution into the furnace filled with the plates by utilizing vacuum pressure difference, pressurizing to 29kgf, keeping the pressure for 1.5h, returning the redundant impregnating solution, cooling to harden the asphalt, and repeating the asphalt impregnating densification process for 3 times. Finally, high-temperature graphitization is carried out in a high-temperature furnace at 1800 ℃ for 48 hours to obtain the carbon fiber net tyre plate with the density of 1.6g/cm 3 and the thickness of 5 mm.
Example 2
16T of water and 0.6 mass percent of Methyl Cellulose (MC) and 1.2 mass percent of sodium carboxymethyl cellulose (CMC) dispersant are added into a container. Putting 16000g of weighed short carbon fiber with the length of 20mm into a container, immersing the short carbon fiber completely and slightly excessively, carrying out ultrasonic oscillation for 10min under the power condition of 250W, stirring simultaneously, keeping the water temperature at 38 ℃, and dispersing the short carbon fiber by micro bubbles generated by microwave oscillation to tend to be in a monofilament state. Pouring the dispersed short carbon fibers into a buchner funnel which is vacuumized, and enabling the liquid in the buchner funnel to flow out along with the airflow through a vacuum pump, so that the short carbon fibers are deposited in the buchner funnel.
Mechanically mixing liquid phenolic resin and alcohol, wherein the mass ratio of the phenolic resin to the 95% alcohol is 6:4, the viscosity at 25 ℃ after mixing is 1000 MPa.s. Pouring the prepared resin into a mould, soaking for 12.5 hours, continuing suction filtration, enabling the solution to fully flow through the pores left after the fiber is formed, air-drying, demoulding and sampling to obtain the composite carbon fiber substrate.
And (3) placing the composite carbon fiber substrate in an oven to be pre-cured for 12 hours at 80 ℃, then deep curing for 2 hours at 160 ℃, and carbonizing the composite carbon fiber substrate in a vacuum carbon tube furnace at 950 ℃ for 84 hours. Impregnating the asphalt in a vacuum impregnating furnace, heating to 220 ℃ to reduce the viscosity of the asphalt, sucking all impregnating solution into the furnace filled with the plates by utilizing vacuum pressure difference, pressurizing to 29kgf, keeping the pressure for 1.5h, returning the redundant impregnating solution, cooling to harden the asphalt, and repeating the asphalt impregnating densification process for 3 times. Finally, high-temperature graphitization is carried out in a high-temperature furnace at 1800 ℃ for 48 hours to obtain the carbon fiber net tyre plate with the density of 1.56g/cm 3 and the thickness of 5 mm.
Example 3
17T of water and 0.6 mass percent of Methyl Cellulose (MC) and 1.2 mass percent of sodium carboxymethyl cellulose (CMC) dispersant are added into a container. And (3) putting 17000g of weighed short carbon fibers with the length of 30mm into a container, immersing the short carbon fibers completely and slightly excessively, carrying out ultrasonic oscillation for 10min under the power condition of 250W, stirring simultaneously, keeping the water temperature at 38 ℃, and dispersing the short carbon fibers by micro bubbles generated by microwave oscillation to tend to a monofilament state. Pouring the dispersed short carbon fibers into a buchner funnel which is vacuumized, and enabling the liquid in the buchner funnel to flow out along with the airflow through a vacuum pump, so that the short carbon fibers are deposited in the buchner funnel.
Mechanically mixing liquid phenolic resin and alcohol, wherein the mass ratio of the phenolic resin to the 95% alcohol is 6:4, the viscosity at 25 ℃ after mixing is 1000 MPa.s. Pouring the prepared resin into a mould, soaking for 12.5 hours, continuing suction filtration, enabling the solution to fully flow through the pores left after the fiber is formed, air-drying, demoulding and sampling to obtain the composite carbon fiber substrate.
And (3) placing the composite carbon fiber substrate in an oven to be pre-cured for 12 hours at 80 ℃, then deep curing for 2 hours at 160 ℃, and carbonizing the composite carbon fiber substrate in a vacuum carbon tube furnace at 950 ℃ for 84 hours. Impregnating the asphalt in a vacuum impregnating furnace, heating to 220 ℃ to reduce the viscosity of the asphalt, sucking all impregnating solution into the furnace filled with the plates by utilizing vacuum pressure difference, pressurizing to 29kgf, keeping the pressure for 1.5h, returning the redundant impregnating solution, cooling to harden the asphalt, and repeating the asphalt impregnating densification process for 3 times. Finally, high-temperature graphitization is carried out in a high-temperature furnace at 1800 ℃ for 48 hours to obtain the carbon fiber net tyre plate with the density of 1.59g/cm 3 and the thickness of 5 mm.
As can be seen from fig. 1-2, the carbon fiber dispersing effect is very uniform, no agglomeration phenomenon exists, and the surface flatness of the suction filtered plate is good.
Test case
The carbon fiber mesh tire plates obtained in examples 1 to 3 were subjected to various physical property tests according to the following standards or methods: tensile strength (GBT 33501-2017); flexural strength/flexural modulus (QJ 2009-91); coefficient of thermal expansion (GB/T4722-2017); resistivity (four probe method). The test data are shown in Table 1.
Table 1 physical properties test data of carbon fiber net tire plates obtained in examples 1 to 3
As can be seen from table 1, the carbon fiber net clamping-bed plate prepared by vacuum filtration has high density, high strength, equivalent thermal expansion coefficient, thermal conductivity and resistivity, excellent performance, adaptability to complex process environment, difficult damage, low replacement frequency and long service cycle.
According to the preparation method provided by the embodiment of the invention, the surface of the carbonized composite material is flat and smooth, the pore distribution is uniform, and the pores are basically of the size of micropores, so that the fibers are more easily densified by relatively low-cost asphalt liquid phase impregnation, and matrix carbon is uniformly filled, so that the composite material has a more complete bonding interface between the fibers and resin carbon, and the bending strength and the interlaminar shear strength are further improved under the condition that gas phase densification is not needed, and the carbon fiber net tire plate with low cost, excellent comprehensive mechanical property, smooth surface, no burrs and no holes is obtained. Through the liquid phase suction filtration molding and asphalt liquid phase densification with lower cost, the material can have excellent bending strength and better interlayer shearing strength after reaching medium density.
Although the foregoing embodiments have been described in some, but not all embodiments of the invention, other embodiments may be obtained according to the present embodiments without departing from the scope of the invention.
Claims (10)
1. The preparation method of the carbon fiber mesh tire plate is characterized by comprising the following steps of:
Mixing short carbon fibers with a dispersing agent solution, and performing first vacuum suction filtration to obtain a tiled carbon fiber bundle;
Pouring phenolic resin solution on the tiled carbon fiber bundles, and sequentially carrying out impregnation, second vacuum suction filtration and drying to obtain a composite carbon fiber substrate;
And sequentially carrying out solidification, carbonization, asphalt impregnation densification and graphitization on the composite carbon fiber substrate to obtain the carbon fiber net tyre plate.
2. The method of claim 1, wherein the dispersant in the dispersant solution comprises one or more of methylcellulose, sodium carboxymethylcellulose, and hydroxyethylcellulose.
3. The method according to claim 1, wherein the mixing is by ultrasonic vibration;
The power of the ultrasonic oscillation is 200-500W, and the time is 5-15 min.
4. The method of claim 1, wherein the phenolic resin solution comprises a phenolic resin and an aqueous ethanol solution;
the mass ratio of the phenolic resin to the ethanol aqueous solution is 6-8: 4 to 6.
5. The method of claim 1, wherein the curing comprises sequential pre-curing and deep curing;
the pre-curing temperature is 50-80 ℃ and the pre-curing time is 10-15 h;
the temperature of the deep solidification is 120-180 ℃ and the time is 1-3 h.
6. The method according to claim 1, wherein the carbonization temperature is 950 to 1100 ℃ for 80 to 90 hours.
7. The method according to claim 1, wherein the asphalt impregnation densification is performed at a temperature of 150 to 220 ℃, a pressure of 27 to 29kgf, and a dwell time of 1 to 1.5 hours.
8. The method according to claim 1, wherein the graphitization is performed at a temperature of 1800 to 2300 ℃ for 40 to 50 hours.
9. The carbon fiber mesh sheet material obtained by the production method according to any one of claims 1 to 8, wherein the density of the carbon fiber mesh sheet material is 1.4 to 1.6g/cm 3 and the thickness is 5mm or more.
10. Use of the carbon fiber web tire plate of claim 9 in the manufacture of a tire.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410069411.XA CN117945776A (en) | 2024-01-18 | 2024-01-18 | Carbon fiber net tire plate and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410069411.XA CN117945776A (en) | 2024-01-18 | 2024-01-18 | Carbon fiber net tire plate and preparation method and application thereof |
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| CN117945776A true CN117945776A (en) | 2024-04-30 |
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| CN202410069411.XA Pending CN117945776A (en) | 2024-01-18 | 2024-01-18 | Carbon fiber net tire plate and preparation method and application thereof |
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| CN (1) | CN117945776A (en) |
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