CN115961503A - Carbon fiber paper and preparation method thereof - Google Patents
Carbon fiber paper and preparation method thereof Download PDFInfo
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- CN115961503A CN115961503A CN202211556299.XA CN202211556299A CN115961503A CN 115961503 A CN115961503 A CN 115961503A CN 202211556299 A CN202211556299 A CN 202211556299A CN 115961503 A CN115961503 A CN 115961503A
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 210
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 210
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000002360 preparation method Methods 0.000 title abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 90
- 239000000835 fiber Substances 0.000 claims abstract description 48
- 230000003068 static effect Effects 0.000 claims abstract description 30
- 230000005684 electric field Effects 0.000 claims abstract description 17
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 230000009471 action Effects 0.000 claims abstract description 7
- 230000008021 deposition Effects 0.000 claims abstract description 7
- 238000007664 blowing Methods 0.000 claims abstract description 5
- 238000007667 floating Methods 0.000 claims abstract description 4
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- 238000007254 oxidation reaction Methods 0.000 claims description 27
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- 239000000853 adhesive Substances 0.000 claims description 16
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- 238000003763 carbonization Methods 0.000 claims description 12
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- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 7
- 229920001568 phenolic resin Polymers 0.000 claims description 7
- 239000005011 phenolic resin Substances 0.000 claims description 7
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- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 229920002678 cellulose Polymers 0.000 claims description 5
- 239000001913 cellulose Substances 0.000 claims description 5
- 239000003822 epoxy resin Substances 0.000 claims description 5
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- 238000009960 carding Methods 0.000 claims description 4
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- 239000008107 starch Substances 0.000 claims description 4
- 235000019698 starch Nutrition 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 239000004925 Acrylic resin Substances 0.000 claims description 3
- 229920000178 Acrylic resin Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 230000008569 process Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000007598 dipping method Methods 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 241001089723 Metaphycus omega Species 0.000 description 6
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- 229920000742 Cotton Polymers 0.000 description 2
- QXZUUHYBWMWJHK-UHFFFAOYSA-N [Co].[Ni] Chemical compound [Co].[Ni] QXZUUHYBWMWJHK-UHFFFAOYSA-N 0.000 description 2
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention provides carbon fiber paper and a preparation method thereof. The preparation method of the carbon fiber paper comprises the following steps: respectively pretreating the substrate and the carbon fiber, and placing the pretreated carbon fiber in a fiber box; placing the fiber box in a static electric field, wherein one side of the fiber box is provided with a grid plate, and the grid plate is provided with regularly-arranged pores; blowing the carbon fibers in the fiber box to enable the carbon fibers to float in the fiber box, wherein the floating carbon fibers move towards the substrate through the pores under the action of the static electric field and are adhered to the substrate; adjusting the angle of the grid plate relative to the substrate, and controlling the gas flow rate, the flow and the deposition direction of the carbon fibers so that the carbon fibers are in crossed ordered arrangement on the substrate; and carrying out post-treatment on the substrate adhered with the carbon fibers to obtain the carbon fiber paper. The invention combines the static electric field and the hydromechanics to realize the directional deposition of the carbon fiber on the surface of the viscous substrate, thereby obtaining the carbon fiber paper with ordered structure and improving the conductivity and the mechanical strength of the carbon fiber paper.
Description
Technical Field
The invention relates to carbon fiber paper and a preparation method thereof, and belongs to the technical field of special paper.
Background
The carbon fiber paper is a porous composite material formed by carbon fibers and a carbon matrix, and has wide application in the fields of fuel cell gas diffusion layers, super capacitor current collectors, gas filters, electrolytic water electrodes and the like. In devices related to electrochemical processes, such as fuel cells, supercapacitors, electrolytic water tanks and the like, carbon fiber paper is used as a supporting material and plays a role in both mass transfer and electric conduction. Therefore, carbon fiber paper is required to have good electrical conductivity as well as good porosity. Generally, the conductivity of carbon fiber paper is mainly determined by two factors, namely, the conductivity of carbon fibers and the contact resistance influenced by the tight adhesion of carbon fibers.
In order to improve the conductivity of the carbon fiber paper, the chinese patent CN201610867661.3 combines screen printing with spraying, and uses a high-conductivity material to optimize the performance of the carbon fiber paper. The method specifically comprises the step of preparing a first slurry with uniform components from a high-conductivity material, a pore-forming agent, a hydrophobic agent and a dispersion liquid in a stirring manner. And coating the prepared first slurry on the treated carbon paper in a screen printing mode. And then spraying a second slurry consisting of a high-conductivity material, a hydrophobic agent and a dispersion liquid on the carbon fiber paper in a preset thickness in a spraying manner to form a second spraying layer. Finally, the carbon fiber paper with high flatness, good durability and high conductivity is obtained. However, in the scheme, after the carbon fiber paper is molded, the conductivity is improved by an external modification technical means, and the arrangement of the carbon fibers is not optimized.
In order to improve the conductivity from the carbon fiber layer, the chinese invention patent CN201910851387.4 improves the overall conductivity by loading a Fe-NiCoP heterostructure on the surface of the carbon fiber. Specifically, the nickel-cobalt nanorod is directly grown on the carbon fiber by a hydrothermal growth method. And then growing the iron-nickel cube on the top of the nickel-cobalt nanorod by the second ion-guided growth. The heterostructure accelerates the transmission of electrons and improves the conductivity of the material. The prepared sample has high-efficiency catalytic activity and stability, and can be used in the field of water electrolysis. The proposal is to effectively modify the carbon fiber paper from a more microscopic level. However, this solution is only suitable for the preparation of small devices and is not capable of rapidly preparing high conductivity products in batches.
In order to improve the structural strength of carbon fiber paper, the chinese patent CN202010760099.0 provides a method for preparing a carbon paper precursor for a gas diffusion layer of a fuel cell. The preparation method comprises the steps of mixing and dispersing carbon fibers with different lengths with nano-cellulose, adding an auxiliary agent to improve the retention rate of fine fibers, then obtaining carbon fiber paper wet paper by a wet forming technology, then immersing resin into carbon paper by a vacuum negative pressure suction process, and drying in vacuum to obtain a carbon paper precursor. The addition of the nanocellulose can form hydrogen bond between carbon fibers, so that the carbon paper has excellent mechanical strength and structural stability. Cellulose does not have the property of being electrically conductive.
In view of the above, it is necessary to provide a carbon fiber paper and a method for preparing the same to solve the above problems.
Disclosure of Invention
The invention aims to provide carbon fiber paper and a preparation method thereof, and aims to solve the problems of poor conductivity and low mechanical strength of the carbon fiber paper in the prior art.
In order to achieve the above object, the present invention provides a method for preparing carbon fiber paper, comprising:
s1, pretreating a substrate, pretreating carbon fibers, and placing the pretreated carbon fibers in a fiber box;
s2, placing the fiber box in a static electric field, wherein a grid plate is arranged on one side of the fiber box, and regularly-arranged holes are formed in the grid plate;
s3, blowing the carbon fibers in the fiber box to enable the carbon fibers to float in the fiber box, wherein under the action of a static electric field, the floating carbon fibers pass through the pores to move towards the substrate and are adhered to the substrate;
s4, adjusting the angle of the grid plate relative to the substrate, and controlling the gas flow rate, the flow and the deposition direction of the carbon fibers to enable the carbon fibers to be in crossed ordered arrangement on the substrate;
and S5, carrying out post-treatment on the substrate adhered with the carbon fibers to obtain carbon fiber paper.
As a further improvement of the present invention, the pretreatment of the substrate in S1 is to dispose a viscous substance on the substrate; the pretreatment of the carbon fiber comprises:
s11, carrying out high-temperature oxidation treatment on the carbon fibers;
s12, carrying out chopping treatment on the carbon fiber subjected to the high-temperature oxidation treatment;
s13, placing the chopped carbon fibers in a fiber carding machine to open the chopped carbon fibers.
As a further improvement of the invention, the temperature of the high-temperature oxidation is 300-500 ℃, the time of the high-temperature oxidation is 5-10 hours, and the length of the chopped carbon fiber is 3-10 mm.
As a further improvement of the invention, the viscous substance is any one of starch, cellulose, polyvinyl alcohol and polyacrylamide.
As a further improvement of the present invention, in S2, an electrostatic force field is provided by an electrostatic generator, the fiber box is disposed opposite to the pretreated substrate, and the grid plate is disposed on a side of the fiber box near the substrate.
As a further improvement of the invention, the distance between the grid plate and the substrate is 20-50 cm, and the voltage of the electrostatic generator is controlled to be 50-200 kilovolts.
As a further improvement of the present invention, the post-processing in S5 includes:
s51, placing the substrate adhered with the carbon fibers in a high-temperature oven for glue removal treatment to obtain carbon fiber flannelette;
s52, soaking the carbon fiber flannelette into a curing agent, and then putting the carbon fiber flannelette into a high-temperature furnace for carbonization to obtain the carbon fiber paper.
As a further improvement of the invention, the temperature of the high-temperature oven is 300-450 ℃, and the carbonization temperature in the high-temperature oven is 2000-2500 ℃.
As a further improvement of the invention, the curing agent is any one of epoxy resin, phenolic resin, acrylic resin and polyurethane.
In order to achieve the purpose, the invention also provides carbon fiber paper which is prepared according to the preparation method of the carbon fiber paper.
The beneficial effects of the invention are: according to the preparation method of the carbon fiber paper, the static electric field and the fluid mechanics are combined, the regularly arranged holes are formed in the grid plate to control the output direction and the angle of the carbon fibers, and the carbon fibers can be directionally deposited on the surface of the viscous substrate under the suction effect of the static electric field, so that the carbon fiber paper with an ordered structure is obtained, and the overall conductivity and the mechanical strength of the carbon fiber paper are further improved; the preparation method completely does not need water or solvent in the preparation process, can effectively avoid water resource waste and wastewater pollution, and is a very environment-friendly special paper production scheme; according to the technical scheme, the carbon fibers can be used as raw materials, the cotton fibers, the synthetic fibers and other raw materials can be used for producing the paper, then the core framework of the paper is obtained, and finally the disordered carbon fibers are continuously deposited on the ordered core framework, so that the paper has the advantage and characteristic of integrating ordered and disordered structures.
Drawings
FIG. 1 is a flow chart of a method of making a carbon fiber paper in a preferred embodiment of the invention.
Fig. 2 is a flowchart of S1 in fig. 1.
Fig. 3 is a flowchart of S5 in fig. 1.
FIG. 4 is a schematic representation of the preparation of carbon fibers through a grid to form an ordered carbon fiber paper in a preferred embodiment of the invention.
FIG. 5 is a graph of the performance characteristics of the carbon fiber papers prepared in examples 1, 2, 3, 4, 5 and 6 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, the present invention discloses a method for preparing carbon fiber paper, including:
s1, pretreating a substrate, pretreating carbon fibers, and placing the pretreated carbon fibers in a fiber box;
s2, placing the fiber box in a static electric field, wherein a grid plate is arranged on one side of the fiber box, and regularly arranged holes are formed in the grid plate;
s3, blowing the carbon fibers in the fiber box to enable the carbon fibers to float in the fiber box, wherein the floating carbon fibers move towards the substrate through the pores under the action of the static electric field and are adhered to the substrate;
s4, adjusting the angle of the grid plate relative to the substrate, and controlling the gas flow rate, the flow and the deposition direction of the carbon fibers so that the carbon fibers are arranged on the substrate in a crossed and ordered manner;
and S5, carrying out post-treatment on the substrate adhered with the carbon fibers to obtain the carbon fiber paper.
Wherein, the pretreatment of the substrate in S1 comprises: the substrate is specifically made of any one of a glass fiber mesh, a nylon fiber mesh, a polyester mesh and an acrylic fiber mesh, and the adhesive is made of any one or a combination of several of starch, cellulose, polyvinyl alcohol and polyacrylamide.
Specifically, in the pretreatment process of the substrate, the device further comprises a glue solution dipping device for attaching the viscous substance to the surface of the substrate, wherein the viscous substance is arranged in the glue solution dipping device, the substrate passes through the glue solution dipping device, and the surface of the substrate is subjected to gluing treatment, namely, the viscous substance is attached to the surface of the substrate, and the gluing mode is any one of spraying, roll coating and dipping. Preferably, the adhesive is provided on one side of the substrate.
The specific structure of the glue solution dipping device can be designed according to the prior art, as long as the adhesive substance can be attached to the surface of the substrate, and the structure of the glue solution dipping device is not limited here.
Referring to fig. 2, the pretreatment of the carbon fiber in S1 includes:
s11, carrying out high-temperature oxidation treatment on the carbon fibers;
s12, carrying out chopping treatment on the carbon fiber subjected to the high-temperature oxidation treatment;
s13, placing the chopped carbon fibers in a fiber carding machine to open the chopped carbon fibers.
Specifically, firstly, the carbon fiber is subjected to high-temperature oxidation treatment, the temperature of the oxidation treatment is 300-500 ℃, the oxidation time is 5-10 hours, the moisture on the surface of the carbon fiber is removed through the high-temperature oxidation treatment, the adhesion is avoided, and meanwhile, the structural strength of the carbon fiber is improved.
And secondly, chopping the carbon fibers subjected to the high-temperature oxidation treatment, wherein the length of the chopped carbon fibers is 3-10 mm, so that the carbon fibers can be conveniently and subsequently loosened and suspended under the action of air flow.
And finally, placing the chopped carbon fibers in a fiber carding machine to perform dissociation opening on the chopped carbon fibers so as to weaken mutual influence among the carbon fibers. The dissociated and opened carbon fibers are then placed in a fiber box.
In S2, a static electric field is formed through the static generator, the substrate penetrates out of the glue solution dipping device and then enters the static electric field, the fiber box containing the dissociated and opened carbon fibers is also placed in the static electric field and is arranged opposite to the pretreated substrate, and the grid plate is arranged on one side, close to the substrate, of the fiber box.
Preferably, the voltage of the electrostatic generator is controlled to be 50-200 kv, and the grid is opposite to the side of the substrate provided with the viscous substance, so that the carbon fiber in the fiber cartridge can adhere to the viscous substance after passing through the grid.
In this embodiment, the grid plate is provided with a plurality of pores, the pores are arranged in a strip shape on the grid plate, and the plurality of pores are sequentially arranged on the grid plate to form the carbon fiber strips which are orderly arranged on the viscous substance.
In this embodiment, put into the electrostatic force field at the fibre box, then with the fibre box be close to the side of substrate change for the grid plate that is equipped with regularly arranged's hole for carbon fiber in the fibre box can pass the hole and move to the substrate, of course, in other embodiments, the grid plate also can directly be located on the fibre box, as long as can realize that carbon fiber in the fibre box can pass the grid plate and move towards the substrate, here does not do the restriction.
In S3 and S4, an air supply device is further connected to one side, away from the grid plate, of the fiber box, air flow is input into the fiber box through the air supply device, so that carbon fibers in the fiber box are blown, the carbon fibers are suspended in the fiber box, move towards the substrate through the gaps under the action of the electrostatic force field, and finally adhere to the viscous substances on the substrate. Preferably, the air supply device is a blower.
In this embodiment, the electrostatic generator and the fiber box are disposed opposite to each other and are disposed on two sides of the substrate, but in other embodiments, the electrostatic generator and the fiber box may also be disposed on the same side of the substrate, and the fiber box is disposed between the electrostatic generator and the substrate, so that the carbon fibers in the fiber box can move toward the substrate, which is not limited herein.
The method includes the steps of arranging a certain distance between a grid plate and a substrate, enabling the grid plate to rotate relative to the substrate in an electrostatic force field, changing the arrangement mode of carbon fibers on the substrate to form crossed and ordered carbon fiber strips, specifically, controlling the air volume output of an air blower to control the flow velocity and the flow of air flow flowing out of the grid plate in a fiber box, controlling the deposition direction of the carbon fibers on the substrate by controlling the angle between the grid plate and the substrate to achieve crossed and ordered arrangement of the carbon fibers on the substrate.
Preferably, the distance between the grid plate and the substrate is 20-50 cm, and the grid plate can rotate relative to the substrate by 360 degrees.
Referring to fig. 3, the post-processing of the substrate adhered with the carbon fibers in S5 includes:
s51, placing the substrate adhered with the carbon fibers in a high-temperature oven for glue removal treatment to obtain carbon fiber flannelette;
s52, soaking the carbon fiber flannelette in a curing agent, and then placing the carbon fiber flannelette in a high-temperature furnace for carbonization to obtain the carbon fiber paper.
Specifically, the substrate provided with the viscous substance is adhered with the orderly arranged carbon fibers in the electrostatic force field and then enters a high-temperature oven for glue removal treatment, preferably, the temperature of the high-temperature oven is 300-450 ℃ so as to remove glue and separate the substrate from the orderly arranged carbon fibers to obtain the substrate and carbon fiber flannelette, and then the substrate is rolled so as to realize the recycling of the substrate.
And then, soaking the carbon fiber flannelette into a curing agent, and then carbonizing the carbon fiber flannelette in a high-temperature furnace, wherein the curing agent is any one or a combination of more of epoxy resin, phenolic resin, acrylic resin and polyurethane, and the carbonization temperature in the high-temperature furnace is 2000-2500 ℃, so that the carbon fiber paper with an ordered structure is obtained by carbonizing the carbon fiber flannelette.
To describe more specifically that the carbon fibers pass through the grid plate to form the carbon fiber strips crossing and ordering on the substrate, please refer to fig. 2, the air blowing device blows air into the fiber box, so that the carbon fibers float, and the carbon fibers can flow along with the air flow to form the air flow 1 containing the opened carbon fibers, the air flow 1 containing the opened carbon fibers carries the carbon fibers to pass through the grid plate 2 and move towards the substrate 3 with the sticky substance under the action of the static electric field, and the carbon fibers are adhered on the sticky substance to form the carbon fiber strips, and the shape and the arrangement direction of the carbon fiber strips are the same as the arrangement shape of the pores on the grid plate 2, at this time, the angle of the grid plate 2 relative to the substrate 3 is changed, and the angle of the air flow 1 containing the opened carbon fibers is also changed, so that the carbon fiber strips crossing the carbon fiber strips, namely the carbon fiber paper 4 with ordered structure, are formed on the substrate 3.
In order to better describe the technical scheme of the invention, six preferred embodiments are also provided:
example 1
The preparation process comprises the following steps: the oxidation temperature of the carbon fiber is controlled at 300 ℃, the oxidation time is controlled at 10 hours, and the length of the carbon fiber after being chopped is 3mm. The static power field is provided by a static generator, and the voltage is controlled at 100kV. The adhesive used in the adhesive substrate was polyvinyl alcohol, and the distance between the grid and the substrate was 50cm. And (3) controlling the temperature to be 450 ℃ in the glue removing process in the high-temperature oven. The curing agent for impregnating the carbon fiber flannelette is phenolic resin, and the high-temperature carbonization temperature of the carbon fiber paper is 2200 ℃.
As shown in FIG. 4, the carbon fiber paper prepared in this example had a resistivity of 7.4 m.OMEGA.cm under a pressure of 1MPa 2 The tensile strength was 7.5MPa.
Example 2
The preparation process comprises the following steps: the oxidation temperature of the carbon fiber is controlled at 500 ℃, the oxidation time is controlled at 5 hours, and the length of the carbon fiber after being chopped is 6mm. The static power field is provided by a static generator, and the voltage is controlled at 50kV. The adhesive used in the adhesive substrate was polyvinyl alcohol, and the distance between the grid and the substrate was 30cm. And (3) controlling the temperature to be 300 ℃ in the glue removing process in the high-temperature oven. The curing agent for impregnating the carbon fiber flannelette is phenolic resin, and the high-temperature carbonization temperature of the carbon fiber paper is 2500 ℃.
As shown in FIG. 4, the carbon fiber paper prepared in this example had a resistivity of 4.5 m.OMEGA.cm under a pressure of 1MPa 2 The tensile strength was 8.8MPa.
Example 3
The preparation process comprises the following steps: the oxidation temperature of the carbon fiber is controlled at 400 ℃, the oxidation time is controlled at 7 hours, and the length of the carbon fiber after being chopped is 10mm. The static power field is provided by a static generator, and the voltage is controlled at 200kV. The adhesive used in the adhesive substrate was polyacrylamide, and the distance between the grid and the substrate was 20cm. And (3) controlling the temperature to be 400 ℃ in the glue removing process in the high-temperature oven. The curing agent for impregnating the carbon fiber flannelette is phenolic resin, and the high-temperature carbonization temperature of the carbon fiber paper is 2000 ℃.
As shown in FIG. 4, the carbon fiber paper prepared in this example had a resistivity of 6.3 m.OMEGA.cm under a pressure of 1MPa 2 The tensile strength was 10.9MPa.
Example 4
The preparation process comprises the following steps: the oxidation temperature of the carbon fiber is controlled at 350 ℃, the oxidation time is controlled at 8 hours, and the length of the chopped carbon fiber is 6mm. The static power field is provided by a static generator, and the voltage is controlled at 150kV. The adhesive used in the adhesive substrate was polyacrylamide and the distance between the grid and the substrate was 30cm. And in the glue removing process in a high-temperature oven, the temperature is controlled at 400 ℃. The curing agent for impregnating the carbon fiber flannelette is epoxy resin, and the high-temperature carbonization temperature of the carbon fiber paper is 2200 ℃.
As shown in FIG. 4, the carbon fiber paper prepared in this example had a volume resistivity of 6.2 m.OMEGA.cm under a pressure of 1MPa 2 The tensile strength was 8.7MPa.
Example 5
The preparation process comprises the following steps: the oxidation temperature of the carbon fiber is controlled at 450 ℃, the oxidation time is controlled at 8 hours, and the length of the carbon fiber after being chopped is 7mm. The static power field is provided by a static generator, and the voltage is controlled at 200kV. The adhesive used in the adhesive backing was starch, and the distance between the grid and the backing was 25cm. And in the glue removing process in the high-temperature oven, the temperature is controlled to be 380 ℃. The curing agent for impregnating the carbon fiber flannelette is epoxy resin, and the high-temperature carbonization temperature of the carbon fiber paper is 2300 ℃.
As shown in FIG. 4, the carbon fiber paper prepared in this example had a resistivity of 5.1 m.OMEGA.cm under a pressure of 1MPa 2 The tensile strength was 9.1MPa.
Example 6
The preparation process comprises the following steps: the oxidation temperature of the carbon fiber is controlled at 500 ℃, the oxidation time is controlled at 6 hours, and the length of the carbon fiber after being chopped is 4mm. The static power field is provided by a static generator, and the voltage is controlled at 150kV. The adhesive used in the adhesive substrate was polyacrylamide, and the distance between the grid and the substrate was 40cm. And in the glue removing process in a high-temperature oven, the temperature is controlled at 450 ℃. The curing agent for impregnating the carbon fiber flannelette is phenolic resin, and the high-temperature carbonization temperature of the carbon fiber paper is 2500 ℃.
As shown in FIG. 4, the carbon fiber paper prepared in this example had a volume resistivity of 5.3 m.OMEGA.cm under a pressure of 1MPa 2 The tensile strength was 8.1MPa.
Compared with the prior art, the carbon fiber paper prepared by the technical scheme of the invention has lower resistivity and stronger tensile strength, so that the overall conductivity and mechanical strength of the carbon fiber paper are improved.
In conclusion, the preparation method of the carbon fiber paper combines the static electric field and the fluid mechanics, and the grid plate is provided with the pores which are regularly arranged to control the output direction and the angle of the carbon fibers, so that the carbon fibers can realize the directional deposition of the carbon fibers on the surface of the viscous substrate under the suction effect of the static electric field, thereby obtaining the carbon fiber paper with an ordered structure and further improving the overall conductivity and the mechanical strength of the carbon fiber paper; at present, the papermaking technology is mainly formed by a wet method, which causes great waste of water resources and generates a great amount of sewage, but the preparation method of the invention completely does not need water and solvent in the preparation process, can effectively avoid water resource waste and wastewater pollution, and is a very environment-friendly special paper production scheme; the preparation method of the invention not only can use the carbon fiber as the raw material, but also can use the cotton fiber, the synthetic fiber and other raw materials to produce the paper, obtains the core skeleton of the paper by the technical scheme, and then continuously deposits the disordered carbon fiber on the ordered skeleton, thereby integrating the advantages and characteristics of the ordered and disordered structures.
Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present invention.
Claims (10)
1. A method for preparing carbon fiber paper is characterized by comprising the following steps:
s1, pretreating a substrate, pretreating carbon fibers, and placing the pretreated carbon fibers in a fiber box;
s2, placing the fiber box in a static electric field, wherein a grid plate is arranged on one side of the fiber box, and regularly arranged holes are formed in the grid plate;
s3, blowing the carbon fibers in the fiber box to enable the carbon fibers to float in the fiber box, wherein under the action of a static electric field, the floating carbon fibers pass through the pores to move to the substrate and are adhered to the substrate;
s4, adjusting the angle of the grid plate relative to the substrate, and controlling the gas flow rate, the flow and the deposition direction of the carbon fibers to enable the carbon fibers to be in crossed ordered arrangement on the substrate;
and S5, carrying out post-treatment on the substrate adhered with the carbon fibers to obtain the carbon fiber paper.
2. The method for producing a carbon fiber paper as recited in claim 1, wherein the pretreatment of the substrate in S1 is to provide an adhesive substance on the substrate; the pretreatment of the carbon fiber comprises:
s11, carrying out high-temperature oxidation treatment on the carbon fibers;
s12, carrying out chopping treatment on the carbon fiber subjected to the high-temperature oxidation treatment;
s13, placing the chopped carbon fibers in a fiber carding machine to open the chopped carbon fibers.
3. The method for producing a carbon fiber paper according to claim 2, characterized in that: the high-temperature oxidation temperature is 300-500 ℃, the high-temperature oxidation time is 5-10 hours, and the length of the chopped carbon fiber is 3-10 mm.
4. The method for producing a carbon fiber paper according to claim 2, characterized in that: the viscous substance is any one of starch, cellulose, polyvinyl alcohol and polyacrylamide.
5. The method for producing a carbon fiber paper according to claim 1, characterized in that: in S2, an electrostatic force field is provided by an electrostatic generator, the fiber box is arranged opposite to the pretreated substrate, and the grid plate is arranged on one side of the fiber box close to the substrate.
6. The method for producing a carbon fiber paper according to claim 5, characterized in that: the distance between the grid plate and the substrate is 20-50 cm, and the voltage of the electrostatic generator is controlled to be 50-200 kilovolts.
7. The method for producing carbon fiber paper according to claim 1, wherein the post-treatment in S5 includes:
s51, placing the substrate adhered with the carbon fibers in a high-temperature oven for glue removal treatment to obtain carbon fiber flannelette;
s52, soaking the carbon fiber flannelette in a curing agent, and then placing the carbon fiber flannelette in a high-temperature furnace for carbonization to obtain carbon fiber paper.
8. The method for producing a carbon fiber paper according to claim 7, characterized in that: the temperature of the high-temperature oven is 300-450 ℃, and the carbonization temperature in the high-temperature oven is 2000-2500 ℃.
9. The method for producing a carbon fiber paper according to claim 7, characterized in that: the curing agent is any one of epoxy resin, phenolic resin, acrylic resin and polyurethane.
10. A carbon fiber paper produced by the method for producing a carbon fiber paper according to any one of claims 1 to 9.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162645A1 (en) * | 1984-05-11 | 1985-11-27 | Masami Harada | Carbon-fiber-covered material |
| JPH0578182A (en) * | 1991-06-27 | 1993-03-30 | Dainippon Ink & Chem Inc | Production of porous carbon formed product and electrode material |
| CN102463211A (en) * | 2010-11-16 | 2012-05-23 | 大连创达技术交易市场有限公司 | Preparation method of novel conductive exothermic carbon fiber composite material |
| CN104661339A (en) * | 2013-11-25 | 2015-05-27 | 大连康赛谱科技发展有限公司 | Electrostatically-manufactured conductive heating carbon fiber composite material |
| US20170373325A1 (en) * | 2015-01-28 | 2017-12-28 | Toray Industries, Inc. | Porous carbon sheet and precursor fiber sheet thereof |
| CN111410546A (en) * | 2020-04-21 | 2020-07-14 | 福建永安市永清石墨烯研究院有限公司 | Preparation method of multi-dimensional high-thermal-conductivity graphene composite board |
| CN112724699A (en) * | 2021-01-19 | 2021-04-30 | 天津泰吉诺新材料科技有限公司 | Preparation process of multifunctional high-thermal-conductivity composite resin with structural orientation |
-
2022
- 2022-12-06 CN CN202211556299.XA patent/CN115961503A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162645A1 (en) * | 1984-05-11 | 1985-11-27 | Masami Harada | Carbon-fiber-covered material |
| JPH0578182A (en) * | 1991-06-27 | 1993-03-30 | Dainippon Ink & Chem Inc | Production of porous carbon formed product and electrode material |
| CN102463211A (en) * | 2010-11-16 | 2012-05-23 | 大连创达技术交易市场有限公司 | Preparation method of novel conductive exothermic carbon fiber composite material |
| CN104661339A (en) * | 2013-11-25 | 2015-05-27 | 大连康赛谱科技发展有限公司 | Electrostatically-manufactured conductive heating carbon fiber composite material |
| US20170373325A1 (en) * | 2015-01-28 | 2017-12-28 | Toray Industries, Inc. | Porous carbon sheet and precursor fiber sheet thereof |
| CN111410546A (en) * | 2020-04-21 | 2020-07-14 | 福建永安市永清石墨烯研究院有限公司 | Preparation method of multi-dimensional high-thermal-conductivity graphene composite board |
| CN112724699A (en) * | 2021-01-19 | 2021-04-30 | 天津泰吉诺新材料科技有限公司 | Preparation process of multifunctional high-thermal-conductivity composite resin with structural orientation |
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