Production process of enhanced carbon paper base paper and carbon paper base paper

Abstract

The present invention discloses a production process for an enhanced carbon paper base, comprising the following steps: S1: subjecting carbon fiber monofilaments to a wax vapor deposition treatment to obtain waxed carbon fibers, and slitting the waxed carbon fibers to obtain chopped carbon fibers; S2: preparing a suspension slurry containing the chopped carbon fibers, papermaking, pressing, and drying at a temperature below the melting point of the wax to obtain a base paper blank; S3: preparing a resin slurry, applying the resin slurry to the base paper blank, and drying at a temperature below the melting point of the wax to remove the solvent in the resin slurry to obtain a resin-containing base paper blank; S4: subjecting the resin-containing base paper blank to sequential hot pressing and carbonization to obtain an enhanced carbon paper base, wherein the wax is insoluble or slightly soluble in the liquid component of the resin slurry; and the hot pressing temperature is greater than the melting point of the wax. This production process utilizes wax to promote the dispersion of carbon fibers in the suspension slurry and can improve the mechanical properties of the carbon paper base, such as bending strength and tensile strength. The present invention also discloses the carbon paper base produced by the production process for the enhanced carbon paper base.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon paper production, and in particular to a production process of enhanced carbon paper base paper and the carbon paper base paper. Background Art

[0002] Carbon paper, the matrix material for the gas diffusion layer of proton exchange membrane dye batteries, offers excellent air permeability, superior electrical conductivity, a suitable porosity and pore size distribution, and exceptional mechanical properties. While primarily composed of disordered carbon fibers, carbon paper exhibits defects, resulting in low overall mechanical strength and brittleness, making it prone to breakage during use.

[0003] Conventional approaches to enhancing carbon paper strength primarily involve depositing organic matter on the paper's surface. This organic matter forms a carbon film during carbonization. The deposited material aligns with the paper's treatment method, such as chemical deposition of chlorinated and non-chlorinated organic matter or impregnation with a resin slurry. Whether vapor deposition or impregnation, excessive weight gain after treatment inevitably leads to deterioration in the paper's porosity and air permeability. Therefore, further exploration of new production processes for enhanced carbon paper bases is necessary. Summary of the Invention

[0004] One of the purposes of the present invention is to overcome the defects existing in the prior art and provide a production process for enhanced carbon paper base paper, which utilizes wax to promote the dispersion of carbon fibers in a suspended slurry; the wax in the base paper blank is removed by hot pressing and carbonization, and the resin layer on the surface of the carbon fibers is deformed into a flat strip by hot pressing and carbonization, which is beneficial to improving the strength of the carbon paper.

[0005] In order to achieve the above technical effects, the technical solution of the present invention is: a production process of enhanced carbon paper base paper, comprising the following steps:

[0006] S1: The carbon fiber monofilament is subjected to a wax deposition treatment to obtain wax-containing carbon fiber, and the wax-containing carbon fiber is cut to obtain chopped carbon fiber;

[0007] S2: preparing a suspension slurry containing chopped carbon fibers, papermaking, pressing, and drying at a temperature below the melting point of wax to obtain a base paper blank;

[0008] S3: preparing a resin slurry, applying the resin slurry to a base paper blank, and drying at a temperature below the melting point of the wax to remove the solvent of the resin slurry, thereby obtaining a base paper blank containing the resin;

[0009] S4: The base paper containing the resin is sequentially hot-pressed and carbonized to obtain a reinforced carbon paper base paper;

[0010] The wax is insoluble or slightly soluble in the liquid component of the resin slurry; and the hot pressing temperature is greater than the melting point of the wax.

[0011] The preferred technical solution is that, based on the mass of the carbon fiber being 100%, the weight gain of the carbon fiber after being treated with vapor-deposited wax is 1.5% to 5%.

[0012] The weight gain rate of the carbon fiber after the wax vapor deposition treatment can be selected as 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5% point values ​​and an interval value with the above two point values ​​as the maximum and minimum values.

[0013] A preferred technical solution is that the mass ratio of the chopped carbon fibers, dispersant, and thickener in the main components of the suspension slurry is 1:(0.1-0.3):(1.5-5). The mass ratio of the chopped carbon fibers to the dispersant can be selected from 1:0.1, 1:0.15, 1:0.2, 1:0.25, 1:0.3, and intervals with the above two points as the maximum and minimum values; at the same time, the mass ratio of the chopped carbon fibers to the thickener can be selected from 1:1.5, 1:2, 1:2.5, 1:3, 1:3.5, 1:4, 1:4.5, 1:5, and intervals with the above two points as the maximum and minimum values.

[0014] A preferred technical solution is that the dispersant includes a nonionic surfactant and an electrolytic inorganic salt dispersant, and the mass ratio of the nonionic surfactant to the electrolytic inorganic salt dispersant is 1:(0.2-0.5). The mass ratio of the nonionic surfactant to the electrolytic inorganic salt dispersant can be selected from 1:0.2, 1:0.3, 1:0.4, 1:0.5, and intervals with the above two points as maximum and minimum values.

[0015] The preferred technical solution is that the average diameter of the S1 carbon fiber monofilament is 5 to 15 μm, and the average length of the chopped carbon fiber is 2 to 6 mm. The average diameter of the carbon fiber monofilament can be selected from 5, 7, 9, 11, 13, and 15 μm points, as well as intervals with the above two points as the maximum and minimum values; the average length of the chopped carbon fiber can be selected from 2, 3, 4, 5, and 6 mm.

[0016] A preferred technical solution is that the resin in the resin slurry is one or a combination of two or more selected from epoxy resin, polyester resin, and phenolic resin.

[0017] The preferred technical solution is that the main components of the resin slurry are alcohol-soluble phenolic resin, glutaraldehyde, polyhydroxy alcohol fatty acid ester and alcohol solvent;

[0018] The mass percentage of the resin in the resin slurry is 3% to 10.5%, the mass percentage of glutaraldehyde is 0.2% to 1%, and the mass percentage of the polyhydroxy alcohol fatty acid ester is 0.03% to 0.2%.

[0019] The mass percentage of the resin in the resin slurry can be selected as 3%, 5%, 7%, 9%, 10.5% and an interval value with the above two point values ​​as the maximum and minimum values; the mass percentage of glutaraldehyde can be selected as 0.2%, 0.4%, 0.6%, 0.8%, 1% and an interval value with the above two point values ​​as the maximum and minimum values; the mass percentage of the polyhydroxy alcohol fatty acid ester can be selected as 0.03%, 0.06%, 0.09%, 0.12%, 0.15%, 0.18%, 0.2% and an interval value with the above two point values ​​as the maximum and minimum values.

[0020] The preferred technical solution is that the wax is microcrystalline wax; the hot pressing temperature in S4 is 150-170°C, the hot pressing pressure is 7-11 MPa, and the hot pressing time is 40-100 min. The hot pressing temperature in S4 can be selected from 150, 155, 160, 165, 170°C, and intervals with the above two points as the maximum and minimum values, the hot pressing pressure can be selected from 7, 8, 9, 10, 11 MPa, and intervals with the above two points as the maximum and minimum values, and the hot pressing time can be selected from 40, 50, 60, 70, 80, 90, 100 min, and intervals with the above two points as the maximum and minimum values.

[0021] The preferred technical solution is that the temperature of the carbonization furnace in S4 is 800-1400°C, and the carbonization time is 40-120 minutes. The temperature of the carbonization furnace in S4 can be selected from 800, 900, 1000, 1100, 1200, 1300, 1400°C, and intervals with the above two points as the maximum and minimum values, and the carbonization time can be selected from 40, 60, 80, 100, 120 minutes, and intervals with the above two points as the maximum and minimum values.

[0022] A second object of the present invention is to provide a carbon paper base, which is produced by the above-mentioned production process of the enhanced carbon paper base.

[0023] The advantages and beneficial effects of the present invention are:

[0024] The production process of this enhanced carbon paper base paper evaporates wax on the surface of the carbon fiber. The lipophilic wax adheres stably to the carbon fiber surface, making the waxed carbon fiber surface smoother, improving the problems of carbon fiber flocculation and entanglement during the suspension slurry dispersion process, and reducing the amount of dispersant and thickener in the suspension slurry.

[0025] When the base paper is hot-pressed, the wax between the carbon fiber and its outer resin layer melts, the wax of the carbon fiber flows out through the pores of the resin layer, and the resin solidifies and adheres to the surface of the carbon fiber in the form of flat strips. The fiber contact points or contact areas at the fiber stacking place increase, which is beneficial to reduce the resistivity and improve the mechanical properties of the carbon paper base paper, such as the bending strength and tensile strength. DETAILED DESCRIPTION

[0026] The following examples are only used to illustrate the technical solution of the present invention more clearly, and are not intended to limit the scope of protection of the present invention.

[0027] wax

[0028] Wax can be paraffin, microcrystalline wax, polyethylene wax, etc. The wax vapor deposition process steps are as follows: a container filled with wax is placed in the sealed inner cavity of the equipment, the fiber transmission section of the monofilament carbon fiber winding device is passed through the sealed inner cavity, the equipment is heated until the temperature of the sealed inner cavity reaches the boiling point of the wax, and the carbon fiber winding device is wound at a predetermined speed. The waxed carbon fiber discharged from the sealed inner cavity is cooled and then wound. Waxed carbon fiber is carbon fiber with a wax hydrophobic layer on its surface.

[0029] The carbon fibers are introduced into a water-soluble dispersant and ultrasonically treated to promote the formation of single fibers. The carbon fiber single fibers serve as the substrate for wax deposition.

[0030] Suspension slurry of chopped carbon fiber

[0031] In the suspension slurry of chopped carbon fibers, the role of the dispersant is to increase the repulsive force between the carbon fibers and improve the dispersion of the carbon fibers in water. The role of the thickener is to increase the viscosity of the slurry, which is conducive to the stable suspension of the carbon fibers.

[0032] The nonionic surfactant may be a polyoxyethylene nonionic surfactant or an alkanolamide nonionic surfactant; the electrolytic inorganic salt dispersant may be anionic polyacrylamide or cationic polyacrylamide; and the thickener may be sodium carboxymethyl cellulose.

[0033] Resin slurry

[0034] Liquid components in the resin slurry include, but are not limited to, solvents. Liquid additives such as wetting agents, crosslinking agents, and leveling agents, which are liquid at room temperature and pressure, may also be included in the resin slurry. Furthermore, because the solvent content in the resin slurry is the highest, while the additive content is low, the amount of wax dissolved in the additive is even smaller. Therefore, the wax is insoluble or slightly soluble in the solvent in the resin slurry.

[0035] The solvent of the resin slurry can be water or an organic solvent (lower alcohol, ketone, ether). When the solvent is water, the resin slurry is mostly a resin water dispersion.

[0036] The boiling point of the polyhydroxy alcohol fatty acid ester is lower than the hot pressing temperature, and can be selected from mono-fatty acid pentaerythritol ester (pentaerythritol monostearate, pentaerythritol monooleate, etc.), polyglycerol stearate (diglycerol stearate, triglycerol monostearate).

[0037] Hot pressing carbonization

[0038] The hot-pressing stage plays a crucial role in determining the final thickness of the carbon paper. Specifically, during the hot-pressing process, the wax melts and flows through the resin pores, solidifying the resin. The high hot-pressing pressure causes the resin layer on the carbon fiber surface to deform and flatten, allowing the flattened resin layer to bond more closely to adjacent fibers.

[0039] The wax that flows out evaporates and separates from the carbon paper during the carbonization and heating process, and the resin layer solidified by heat pressing is further carbonized to generate resin carbon.

[0040] The average diameter of the raw material carbon fiber monofilaments of Examples and Comparative Examples was 10 μm.

[0041] Example 1

[0042] S1: Preparation of wax-containing chopped carbon fibers:

[0043] Monofilament treatment: The carbon fibers were introduced into a 0.5% by mass polyacrylamide dispersant aqueous solution and subjected to ultrasonic treatment at 22 kW for 3 h to separate the monofilamentized carbon fibers.

[0044] Vapor deposition: Multiple carbon fiber monofilaments are wound on a filament roll at intervals. Microcrystalline wax with a melting point of 61-78°C is placed in the inner cavity of the vapor deposition machine. The vapor deposition temperature is 512-515°C. The winding speed of the carbon fiber monofilament is 3m / min. The weight gain of the carbon fiber after vapor deposition wax treatment is 3.52%.

[0045] Weight gain rate = carbon fiber mass after wax deposition / carbon fiber mass before wax deposition * 100% - 1

[0046] Shearing: Shearing the wax-containing carbon fiber to obtain short-cut carbon fiber with an average length of 5 mm.

[0047] S2: Prepare the suspension slurry components according to the mass ratio: 1 part of chopped carbon fiber, 0.057 parts of alkylphenol polyoxyethylene ether, 0.023 parts of polyacrylamide and 3 parts of thickener sodium carboxymethyl cellulose;

[0048] Take 100 parts of water, slowly add the thickener sodium carboxymethyl cellulose into the water, stir until it is completely dissolved to obtain a thickener solution, add polyacrylamide, stir until the polyacrylamide is completely dissolved, and finally add chopped carbon fibers. Use a fiber decomposer to disperse at high speed for 10 minutes, and add water to dilute and disperse until the mass percentage of chopped carbon fibers in the suspended slurry is 0.015%;

[0049] The suspended slurry is introduced into the paper sample sheet making machine, and the short-cut carbon fibers are freely settled on the copper mesh to form a wet paper web. The wet paper web is transferred to the flat vulcanizing machine, and the liquid in the wet paper web is squeezed at 0.25MPa. The paper web is heated to 56±2℃ and dried under reduced pressure to obtain the base paper blank. The surface density of the first base paper is controlled at 75±1g / m 2 within the range.

[0050] S3: Prepare resin slurry components according to mass percentage: 4% alcohol-soluble phenolic resin, 0.5% glutaraldehyde, 0.08% diglycerol stearate, and 95.42% ethanol, and mix the above components evenly to obtain resin slurry;

[0051] The base paper body is impregnated with resin slurry, the amount of resin slurry applied is 80% of the mass of the base paper body, and the base paper body is dried under reduced pressure to obtain a resin-containing base paper body.

[0052] S4: Hot pressing carbonization

[0053] Transfer the resin-containing base paper blank to a flat vulcanizing press and hot-press the base paper blank at 160°C and 10 MPa for 60 minutes;

[0054] The hot-pressed base paper blank was introduced into a carbonization furnace and carbonized at 1300°C for 60 minutes under nitrogen protection.

[0055] After weighing, the mass of the sample paper of Example 1 is 77.2g / m 2 , thickness is 0.18mm;

[0056] The tensile strength of a 15mm wide carbon paper strip was tested using a horizontal computer tensile tester, and the test value was 2.72kN / m.

[0057] Cut a carbon paper sheet with a width of 10mm and a length of 120mm. Place the long edge of the carbon paper on two parallel brackets 80mm apart. Apply a downward force of 100mN to the carbon paper at the center of the parallel brackets to ensure that the carbon paper is not broken. Record the downward bending displacement of the carbon paper at the force point. The test value is 22.3mm.

[0058] The resistivity of the sample paper of Example 1 was measured by a four-probe method and was found to be 4.24 mΩ·cm.

[0059] Example 2

[0060] The difference between Example 2 is that S1 and S2:

[0061] S1: Preparation of waxed chopped carbon fibers

[0062] Monofilament treatment: The carbon fibers were introduced into a 0.5% by mass polyacrylamide dispersant aqueous solution and subjected to ultrasonic treatment at 22 kW for 3 h to separate the carbon fibers into monofilaments.

[0063] Vapor deposition: Multiple carbon fiber monofilaments are wound on a filament roll at intervals. Microcrystalline wax with a melting point of 61-78°C is placed in the inner cavity of the vapor deposition machine. The vapor deposition temperature is 512-515°C. The winding speed of the carbon fiber monofilament is 1.4m / min. The weight gain of the carbon fiber after vapor deposition wax treatment is 5.71%.

[0064] S2: Prepare the suspension slurry components according to the mass ratio: 1.055 parts of chopped carbon fibers, 0.057 parts of alkylphenol polyoxyethylene ether, 0.023 parts of polyacrylamide and 3 parts of sodium carboxymethyl cellulose as thickener;

[0065] The mass of the chopped carbon fibers in S2 was adjusted so that the mass of the carbon fibers in Example 2, excluding the wax, was consistent with that in Example 1.

[0066] Take 100 parts of water, slowly add the thickener sodium carboxymethyl cellulose into the water, stir until it is completely dissolved to obtain a thickener solution, add polyacrylamide, stir until the polyacrylamide is completely dissolved, and finally add chopped carbon fibers. Use a fiber decomposer to disperse at high speed for 10 minutes, and add water to dilute and disperse until the mass percentage of chopped carbon fibers in the suspended slurry is 0.015%;

[0067] The suspended slurry is introduced into the paper sample sheet making machine, and the short-cut carbon fibers are freely settled on the copper mesh to form a wet paper web. The wet paper web is transferred to the flat vulcanizing machine, and the liquid in the wet paper web is squeezed at 0.25MPa. The paper web is heated to 56±2℃ and dried under reduced pressure to obtain the base paper blank. The surface density of the first base paper is controlled at 75±1g / m 2 within the range.

[0068] S3-S4 of the embodiment are the same as those of embodiment 1.

[0069] After weighing, the mass of the sample paper of Example 2 is 78.2g / m 2 , thickness is 0.18mm;

[0070] The tensile strength of a 15mm wide carbon paper strip was tested using a horizontal computer tensile tester, and the test value was 2.41kN / m.

[0071] According to the detection method of Example 1, the downward bending displacement of the carbon paper base paper of Example 2 at the stress-bearing position is 19.7 mm;

[0072] The resistivity of the carbon paper sample of Example 2 was measured using a four-probe method and was found to be 5.02 mΩ·cm.

[0073] Example 2 forms a comparison of microcrystalline wax weighted carbon paper base paper with Example 1. Compared with the density of carbon fiber, the density of microcrystalline wax is smaller. Excessive wax on the surface of carbon fiber will increase the distance between the phenolic resin layer and the carbon fiber surface, reduce the contact points between the resin carbon and the carbon fiber in the carbon paper base paper, or the contact between the resin carbon and the carbon fiber is not close enough, which weakens the reinforcement effect on the carbon fiber and has a more obvious impact on the downward bending displacement of the carbon paper base paper at the stress point.

[0074] Example 3

[0075] Example 3 is based on Example 1, with the difference being that S3:

[0076] S3: preparing a resin slurry component by weight percentage of 4% alcohol-soluble phenolic resin and 96% ethanol, and uniformly mixing the above components to obtain a resin slurry;

[0077] The base paper body is impregnated with resin slurry, the amount of resin slurry applied is 80% of the mass of the base paper body, and the base paper body is dried under reduced pressure to obtain a resin-containing base paper body.

[0078] After weighing, the mass of the sample paper of Example 3 is 77.8g / m 2 , thickness is 0.18mm;

[0079] The tensile strength of a 15mm wide carbon paper strip was tested using a horizontal computer tensile tester, and the test value was 2.37kN / m.

[0080] According to the testing method of Example 1, the downward bending displacement of the carbon paper base paper of Example 3 at the stress-bearing position is 19.1 mm;

[0081] The resistivity of the carbon paper sample of Example 3 was measured using a four-probe method and was found to be 4.65 mΩ·cm.

[0082] Example 3 forms a comparison of the resin slurry components with Example 1. The diglycerol stearate in Example 1 helps to improve the compatibility between the phenolic resin and the carbon fiber. The cross-linking reaction of glutaraldehyde, pentaerythritol fatty acid ester, and the dispersant in the suspended slurry increases the contact area between the phenolic resin and the carbon fiber, improves the adhesion between the resin carbon and the carbon fiber, enhances the carbon fiber stress transfer effect of the resin carbon, and increases the number of electron transfer channels between the resin carbon and the carbon fiber.

[0083] Example 4

[0084] Example 4 is based on Example 1, with the difference being S4:

[0085] S4: Hot pressing carbonization

[0086] Transfer the resin-containing base paper blank to a flat vulcanizing press and hot-press the base paper blank at 160°C and 6MPa for 60 minutes;

[0087] The hot-pressed base paper blank was introduced into a carbonization furnace and carbonized at 1300°C for 60 minutes under nitrogen protection.

[0088] After weighing, the mass of the sample paper of Example 4 is 78.4g / m 2 , thickness is 0.20mm;

[0089] The tensile strength of 15mm wide carbon paper strips was tested using a horizontal computer tensile tester, and the test value was 2.05kN / m.

[0090] According to the testing method of Example 1, the downward bending displacement of the carbon paper base paper of Example 4 at the stress-bearing position is 17.2 mm;

[0091] The resistivity of the carbon paper sample of Example 4 was measured using a four-probe method and was found to be 5.33 mΩ·cm.

[0092] Example 4 forms a comparison of hot pressing pressure with Example 1. In Example 4, the hot pressing pressure is too low, the base paper thickness increases and tends to be loose, the contact area between the carbon fiber and the phenolic resin hot-pressed and solidified on its surface tends to be smaller, and at the same time, the effective contact between the phenolic resin and the surrounding carbon fibers after deformation is also reduced. The phenolic resin directly determines the three-dimensional network distribution of the carbonized resin carbon between the carbon fibers, resulting in a significant decrease in the tensile strength and downward bending displacement of Example 4, and an increase in the resistivity.

[0093] Comparative Example

[0094] The comparative example is based on Example 1, except that the comparative example does not have the vapor deposition wax treatment of the carbon fibers in S1, and the carbon fibers are directly cut to obtain chopped carbon fibers with an average length of 5 mm.

[0095] S2: Prepare the components of the suspension slurry according to the mass ratio: 0.97 parts of chopped carbon fiber, 0.1 parts of dispersant polyacrylamide and 3 parts of thickener sodium carboxymethyl cellulose.

[0096] After weighing, the mass of the comparative sample base paper is 76.6g / m 2 , thickness is 0.18mm;

[0097] The tensile strength of a 15mm wide carbon paper strip was tested using a horizontal computer tensile tester, and the test value was 1.94kN / m.

[0098] According to the detection method of Example 1, the downward bending displacement of the carbon paper base paper of the comparative sample at the stress-bearing position is 18.9 mm;

[0099] The resistivity of the carbon paper base paper of the comparative example sample was measured by the four-probe method and was found to be 4.95 mΩ.cm.

[0100] The comparative example and Example 1 form a comparison of carbon fiber vapor-deposited wax. In the comparative example, phenolic resin is coated on the surface of the carbon fiber. Although the hot pressing pressure is the same as that in Example 1, the deformation of the phenolic resin is limited. Due to the deformation of the phenolic resin, the three-dimensional network connection between the resin carbon and the surrounding carbon fibers is less. Compared with Example 4 and Example 2, the phenolic resin of the comparative example sample is directly attached to the carbon fiber surface, and the resin carbon generated by the carbonization of the phenolic resin is more tightly combined with the carbon fiber to which it is attached. The resistivity of the comparative example sample is lower than that of Example 4 and Example 2.

[0101] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A production process for enhanced carbon paper base paper, characterized in that: The following steps are involved: S1: The carbon fiber monofilament is subjected to a wax deposition treatment to obtain wax-containing carbon fiber, and the wax-containing carbon fiber is cut to obtain chopped carbon fiber; S2: preparing a suspension slurry containing chopped carbon fibers, papermaking, pressing, and drying at a temperature below the melting point of wax to obtain a base paper blank; S3: preparing a resin slurry, applying the resin slurry to a base paper blank, and drying at a temperature below the melting point of the wax to remove the solvent of the resin slurry, thereby obtaining a base paper blank containing the resin; S4: The base paper containing the resin is sequentially hot-pressed and carbonized to obtain a reinforced carbon paper base paper; The wax is insoluble or slightly soluble in the liquid component of the resin slurry; the hot pressing temperature is greater than the melting point of the wax; Taking the mass of carbon fiber as 100%, the weight gain of carbon fiber after wax deposition treatment is 1.5% to 5%. The mass ratio of the chopped carbon fibers, the dispersant, and the thickener in the main components of the suspension slurry is 1:(0.1-0.3):(1.5-5); The wax is microcrystalline wax; the hot pressing temperature in S4 is 150-170° C., the hot pressing pressure is 7-11 MPa, and the hot pressing time is 40-100 min.

2. The production process of the reinforced carbon paper base according to claim 1, characterized in that: The dispersant comprises a nonionic surfactant and an electrolytic inorganic salt dispersant, and the mass ratio of the nonionic surfactant to the electrolytic inorganic salt dispersant is 1:(0.2-0.5).

3. The production process of the reinforced carbon paper base according to claim 1, characterized in that: The average diameter of the S1 carbon fiber monofilament is 5 to 15 μm, and the average length of the chopped carbon fiber is 2 to 6 mm.

4. The production process of the reinforced carbon paper base according to claim 1, characterized in that: The resin in the resin slurry is one selected from epoxy resin, polyester resin, phenolic resin or a combination of two or more thereof.

5. The production process of the reinforced carbon paper base according to claim 4, characterized in that: The main components of the resin slurry are alcohol-soluble phenolic resin, glutaraldehyde, polyhydroxy alcohol fatty acid ester and alcohol solvent; The mass percentage of the resin in the resin slurry is 3% to 10.5%, the mass percentage of glutaraldehyde is 0.2% to 1%, and the mass percentage of the polyhydroxy alcohol fatty acid ester is 0.03% to 0.2%.

6. The production process of the reinforced carbon paper base according to claim 1, characterized in that: The temperature of the carbonization furnace in S4 is 800-1400° C., and the carbonization time is 40-120 minutes.

7. A carbon paper base, characterized in that: The enhanced carbon paper is produced by the production process of the enhanced carbon paper base paper according to any one of claims 1 to 6.