Corrosion-resistant carbon fiber material and preparation method thereof

Abstract

The invention discloses a corrosion-resistant carbon fiber material and a preparation method thereof.The corrosion-resistant carbon fiber material comprises, by mass, 30%-65% of carbon fibers, 30%-65% of resin matrixes and 1%-5% of additives, the carbon fibers are selected from high-strength carbon fibers of polyacrylonitrile, asphalt or other precursors, and the additives are selected from high-strength carbon fibers of polyacrylonitrile, asphalt or other precursors. The resin matrix is selected from epoxy resin, phenolic resin or thermoplastic resin, and the additive is selected from a preservative, an antioxidant, inorganic filler or modified resin. According to the carbon fiber material disclosed by the invention, an antioxidant, an inorganic filler and modified resin can be added according to use requirements while the corrosion resistance is improved, so that the corrosion resistance and the mechanical property of the carbon fiber material are further improved, and the heat resistance and the corrosion resistance in saline water are also improved in an auxiliary manner; and different corrosion-resistant carbon fiber materials can be selected according to the requirements of different working environments.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber, and in particular to a corrosion-resistant carbon fiber material and a preparation method thereof. Background Art

[0002] Carbon fiber refers to high-strength and high-modulus fiber with a carbon content of more than 90%. Carbon fiber material is a high-performance composite material composed of carbon elements. It is widely used in various fields due to its excellent strength, rigidity and lightweight properties.

[0003] The Chinese utility model patent with authorization announcement number CN117186639A discloses a carbon fiber-based composite material and a preparation method thereof, wherein the carbon fiber-based composite material comprises: a carbon fiber fabric; a polyaniline coating layer, wherein the polyaniline coating layer is coated on the surface of the carbon fiber fabric. The carbon fiber-based composite material provided by the present disclosure selects a carbon fiber fabric having the advantages of light weight, high conductivity, high specific strength, and low deformation shrinkage rate as a substrate, and the polyaniline coating layer is coated on the surface of the carbon fiber fabric substrate. The carbon fiber fabric and the polyaniline coating layer produce a synergistic effect, so that the formed carbon fiber-based composite material has excellent electromagnetic shielding performance and a good electromagnetic energy absorption percentage.

[0004] The carbon fiber material in the above patent has average corrosion resistance during use. After a period of use, its performance is easily degraded due to corrosion and it no longer meets the use requirements. Summary of the invention

[0005] The purpose of the present invention is to provide a corrosion-resistant carbon fiber material and a preparation method thereof, so as to solve the problem that the existing carbon fiber material has general corrosion resistance during use, and after a period of use, its performance is easily degraded due to corrosion and no longer meets the use requirements.

[0006] The present invention solves the above technical problems through the following technical solutions, which include:

[0007] Carbon fiber, resin matrix and additives, wherein the carbon fiber, the resin matrix and the additives are 30% to 65% carbon fiber, 30% to 65% resin matrix and 1% to 5% additives in terms of mass ratio. The carbon fiber is high-strength carbon fiber made of polyacrylonitrile, asphalt or other precursors, the resin matrix is ​​epoxy resin, phenolic resin or thermoplastic resin, and the additive is preservative, antioxidant, inorganic filler or modified resin.

[0008] The preparation method of the present invention comprises a carbon fiber preparation unit, a slurry preparation unit, a finished product preparation unit and a performance testing unit, and specifically comprises the following steps:

[0009] Step 1, carbon fiber preparation unit: select raw materials and prepare the required carbon fiber materials;

[0010] Step 2, slurry preparation unit: select resin matrix and additives to prepare the required slurry;

[0011] Step 3, finished product preparation unit: processing the required finished product material through carbon fiber material and slurry;

[0012] Step 4: Performance testing unit: perform performance testing on the prepared finished materials.

[0013] Preferably, the carbon fiber preparation unit includes a fiber preparation module, a carbonization module and a surface treatment module, and specifically includes the following steps:

[0014] Step S1, fiber preparation module: selecting polyacrylonitrile carbon fiber precursor, and preparing fiber by wet or dry spinning;

[0015] Step S2, carbonization module: heating the fiber in an inert atmosphere of nitrogen or argon, carbonizing it at high temperature, heating it to 1000° C. to 3000° C., removing non-carbon elements, and converting it into carbon fiber;

[0016] Step S3, surface treatment module: functionalizing the surface of the carbon fiber to improve the bonding strength with the resin.

[0017] Preferably, the surface functionalization of the surface treatment module is specifically carried out by improving the surface properties of the carbon fiber through oxidation, fluorination or other chemical treatments to enhance the adhesion and corrosion resistance of the resin.

[0018] Preferably, the slurry preparation unit includes a preparation module and a mixing module, and specifically includes the following steps:

[0019] Step N1, preparation module: prepare epoxy resin and required additives, prepare mixer and weighing tools;

[0020] Step N2, mixing module: After weighing the required epoxy resin and additives, add them into the mixer in sequence and stir them to prepare the required resin slurry.

[0021] Preferably, the finished product preparation unit includes an impregnation module, a curing module and a post-processing module, and specifically includes the following steps:

[0022] Step M1, impregnation module: immerse the carbon fiber in the resin slurry to allow the resin slurry to fully penetrate the carbon fiber;

[0023] Step M2, curing module: hardening the resin slurry by thermal curing or UV curing to form a corrosion-resistant composite material;

[0024] Step M3, post-processing module: cutting, shaping and surface repairing the obtained corrosion-resistant composite material.

[0025] Preferably, the performance detection unit includes a mechanical performance test module and a corrosion resistance test module, and specifically includes the following steps:

[0026] Step V1, mechanical properties test module: perform tensile strength, bending strength and impact toughness tests on the post-processed corrosion-resistant composite material;

[0027] Step V2, corrosion resistance test module: perform immersion tests in different chemical environments to observe corrosion resistance.

[0028] Preferably, the preservative additive selected in step N1 is specifically fluoride, the antioxidant additive is specifically tris(hydroxymethyl)aminomethane, the inorganic filler additive is specifically silicate, and the modified resin additive is specifically polyethylene terephthalate.

[0029] Preferably, the mixing process in step N2 is specifically that the mixer speed is between 300 and 1000 rpm for 10 to 30 minutes, so that the additive is completely dispersed and evenly mixed with the resin.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] The carbon fiber material in the present invention can improve the corrosion resistance and mechanical properties of the carbon fiber material by adding antioxidants, inorganic fillers and modified resins according to the use requirements, while improving the heat resistance and corrosion resistance in salt water. Different corrosion-resistant carbon fiber materials can be selected according to the needs of different working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the preparation process of the present invention. DETAILED DESCRIPTION

[0033] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0034] A corrosion-resistant carbon fiber material comprises carbon fiber, a resin matrix and an additive, wherein the carbon fiber, the resin matrix and the additive account for 30% to 65% of the carbon fiber, 30% to 65% of the resin matrix and 1% to 5% of the additive in terms of mass.

[0035] like Figure 1 As shown, a method for preparing a corrosion-resistant carbon fiber material includes a carbon fiber preparation unit, a slurry preparation unit, a finished product preparation unit and a performance testing unit, and specifically includes the following steps:

[0036] Step 1, carbon fiber preparation unit: select raw materials and prepare the required carbon fiber materials;

[0037] Step 2, slurry preparation unit: select resin matrix and additives to prepare the required slurry;

[0038] Step 3, finished product preparation unit: processing the required finished product material through carbon fiber material and slurry;

[0039] Step 4: Performance testing unit: perform performance testing on the prepared finished materials.

[0040] Furthermore, the carbon fiber preparation unit includes a fiber preparation module, a carbonization module and a surface treatment module, and specifically includes the following steps:

[0041] Step S1, fiber preparation module: selecting polyacrylonitrile carbon fiber precursor, and preparing fiber by wet or dry spinning;

[0042] Step S2, carbonization module: heating the fiber in an inert atmosphere of nitrogen or argon, carbonizing it at high temperature, heating it to 1000° C. to 3000° C., removing non-carbon elements, and converting it into carbon fiber;

[0043] Step S3, surface treatment module: functionalizing the surface of the carbon fiber to improve the bonding strength with the resin.

[0044] Furthermore, the surface functionalization of the surface treatment module is specifically carried out by improving the surface properties of the carbon fiber through oxidation, fluorination or other chemical treatments, thereby improving the adhesion and corrosion resistance of the resin.

[0045] Furthermore, the finished product preparation unit includes an impregnation module, a curing module and a post-processing module, and specifically includes the following steps:

[0046] Step M1, impregnation module: immerse the carbon fiber in the resin slurry to allow the resin slurry to fully penetrate the carbon fiber;

[0047] Step M2, curing module: hardening the resin slurry by thermal curing or UV curing to form a corrosion-resistant composite material;

[0048] Step M3, post-processing module: cutting, shaping and surface repairing the obtained corrosion-resistant composite material.

[0049] Furthermore, the performance testing unit includes a mechanical performance testing module and a corrosion resistance testing module, which specifically includes the following steps:

[0050] Step V1, mechanical properties test module: perform tensile strength, bending strength and impact toughness tests on the post-processed corrosion-resistant composite material;

[0051] Step V2, corrosion resistance test module: perform immersion tests in different chemical environments to observe corrosion resistance.

[0052] Embodiment 1

[0053] This embodiment provides a technical solution: a corrosion-resistant carbon fiber material, wherein the carbon fiber is polyacrylonitrile, the resin matrix is ​​epoxy resin, and the additive is a preservative, and the preservative additive is specifically fluoride;

[0054] The preparation method comprises the following steps:

[0055] Step N1, preparing module: preparing epoxy resin and fluoride, preparing a mixer and a weighing tool;

[0056] Step N2, mixing module: weigh the required epoxy resin and fluoride, add them into the mixer in sequence and stir them at a mixer speed of 700 rpm for 20 minutes to make the fluoride completely dispersed and evenly mixed with the resin to prepare the required resin slurry.

[0057] Table 1 Mechanical properties of carbon fiber

[0058]

[0059] Table 2 Corrosion resistance of carbon fiber

[0060]

[0061] Embodiment 2

[0062] This embodiment provides a technical solution: a corrosion-resistant carbon fiber material, wherein the carbon fiber is polyacrylonitrile, the resin matrix is ​​epoxy resin, and the additives are preservatives and antioxidants, wherein the preservative additive is specifically fluoride, and the antioxidant additive is specifically tris(hydroxymethyl)aminomethane;

[0063] The preparation method comprises the following steps:

[0064] Step N1, preparing a module: preparing epoxy resin, fluoride and tris(hydroxymethyl)aminomethane, and preparing a mixer and a weighing tool;

[0065] Step N2, mixing module: weigh the required epoxy resin, fluoride and tris(hydroxymethyl)aminomethane, add them into the mixer in sequence and stir them. The mixer speed is between 700 rpm and the time is 20 minutes. The fluoride and tris(hydroxymethyl)aminomethane are completely dispersed and mixed evenly with the resin to prepare the required resin slurry.

[0066] Table 3 Mechanical properties of carbon fiber

[0067]

[0068]

[0069] Table 4 Corrosion resistance of carbon fiber

[0070]

[0071] Embodiment 3

[0072] This embodiment provides a technical solution: a corrosion-resistant carbon fiber material, wherein the carbon fiber is polyacrylonitrile, the resin matrix is ​​epoxy resin, and the additives are preservatives and inorganic fillers, wherein the preservative additive is specifically fluoride, and the inorganic filler additive is specifically silicate;

[0073] The preparation method comprises the following steps:

[0074] Step N1, preparing module: preparing epoxy resin, fluoride and silicate, preparing a mixer and a weighing tool;

[0075] Step N2, mixing module: weigh the required epoxy resin, fluoride and silicate, add them into the mixer in sequence and stir them. The mixer speed is between 700 rpm and the time is 20 minutes to make the fluoride and silicate completely dispersed and mixed evenly with the resin to prepare the required resin slurry.

[0076] Table 5 Mechanical properties of carbon fiber

[0077]

[0078] Table 6 Corrosion resistance of carbon fiber

[0079]

[0080] Embodiment 4

[0081] This embodiment provides a technical solution: a corrosion-resistant carbon fiber material, wherein the carbon fiber is polyacrylonitrile, the resin matrix is ​​epoxy resin, the additives are preservatives and modified resins, the preservative additive is specifically fluoride, and the modified resin additive is specifically polyethylene terephthalate;

[0082] The preparation method comprises the following steps:

[0083] Step N1, preparing a module: preparing epoxy resin, fluoride and polyethylene terephthalate, and preparing a mixer and a weighing tool;

[0084] Step N2, mixing module: weigh the required epoxy resin, fluoride and polyethylene terephthalate, add them into the mixer in sequence and stir them at a mixer speed of 700 rpm for 20 minutes to make the fluoride completely dispersed and mixed evenly with the resin to prepare the required resin slurry.

[0085] Table 7 Mechanical properties of carbon fiber

[0086]

[0087] Table 8 Corrosion resistance of carbon fiber

[0088]

[0089] By comparing Example 1 with Example 2, while the anti-corrosion performance is increased by the preservative, the addition of an antioxidant can improve the stability of the material in a high temperature environment, help reduce embrittlement caused by oxidation, and thus indirectly improve the toughness of the material;

[0090] Antioxidants inhibit or slow down the occurrence of oxidation reactions and reduce the generation of free radicals, thereby reducing the corrosion rate of the material and further improving the corrosion resistance of carbon fiber materials.

[0091] By comparing Example 1 with Example 3, while the anti-corrosion performance is increased by the preservative, the addition of inorganic fillers can effectively disperse stress, reduce the brittleness of the material, improve toughness, have higher rigidity, and can improve the tensile strength and compressive strength of the carbon fiber material;

[0092] Inorganic fillers enhance the physical structure of carbon fiber materials, help reduce the penetration of moisture and corrosive media, have good chemical stability, and are not easy to react with corrosive media, thereby increasing corrosion resistance.

[0093] By comparing Example 1 with Example 4, while the anticorrosive performance is increased by the preservative, the addition of the modified resin can increase the toughness of the material, reduce the possibility of brittle fracture, and have good adhesion. The interface bonding between the filler and the matrix can be enhanced, the interface defects can be reduced, the overall performance of the composite material can be improved, the impact resistance of the material can be improved, and the heat resistance of the material can be improved.

[0094] The modified resin has excellent chemical resistance and can effectively resist a variety of acids, alkalis and solvents, and is suitable for many corrosive environments.

[0095] It can be seen from a number of embodiments that the carbon fiber material in the present application can improve the corrosion resistance and at the same time, add antioxidants, inorganic fillers and modified resins according to the use requirements to further improve the corrosion resistance and mechanical properties of the carbon fiber material, and also assist in improving the heat resistance and corrosion resistance in salt water. Different corrosion-resistant carbon fiber materials can be selected according to the needs of different working environments.

[0096] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims, but all of them will fall within the scope of protection of the present invention.

Claims

1. A corrosion-resistant carbon fiber material, comprising carbon fiber, a resin matrix and an additive, characterized in that: The carbon fiber, the resin matrix and the additive are in a mass proportion of 30% to 65% carbon fiber, 30% to 65% resin matrix and 1% to 5% additive. The carbon fiber is high-strength carbon fiber selected from polyacrylonitrile, asphalt or other precursors, the resin matrix is ​​epoxy resin, phenolic resin or thermoplastic resin, and the additive is preservative, antioxidant, inorganic filler or modified resin.

2. A method for preparing a corrosion-resistant carbon fiber material, characterized in that: The preparation method is applied to the corrosion-resistant carbon fiber material according to claim 1, comprising a carbon fiber preparation unit, a slurry preparation unit, a finished product preparation unit and a performance testing unit, and specifically comprises the following steps: Step 1, carbon fiber preparation unit: select raw materials and prepare the required carbon fiber materials; Step 2, slurry preparation unit: select resin matrix and additives to prepare the required slurry; Step 3, finished product preparation unit: processing the required finished product material through carbon fiber material and slurry; Step 4: Performance testing unit: perform performance testing on the prepared finished materials.

3. The method for preparing a corrosion-resistant carbon fiber material according to claim 2, characterized in that: The carbon fiber preparation unit includes a fiber preparation module, a carbonization module and a surface treatment module, and specifically includes the following steps: Step S1, fiber preparation module: selecting polyacrylonitrile carbon fiber precursor, and preparing fiber by wet or dry spinning; Step S2, carbonization module: heating the fiber in an inert atmosphere of nitrogen or argon, carbonizing it at high temperature, heating it to 1000° C. to 3000° C., removing non-carbon elements, and converting it into carbon fiber; Step S3, surface treatment module: functionalizing the surface of the carbon fiber to improve the bonding strength with the resin.

4. The method for preparing a corrosion-resistant carbon fiber material according to claim 3, characterized in that: The surface functionalization of the surface treatment module is specifically carried out by improving the surface properties of the carbon fiber through oxidation, fluorination or other chemical treatments, thereby increasing the adhesion and corrosion resistance of the resin.

5. The method for preparing a corrosion-resistant carbon fiber material according to claim 2, characterized in that: The slurry preparation unit includes a preparation module and a mixing module, and specifically includes the following steps: Step N1, preparation module: prepare epoxy resin and required additives, prepare mixer and weighing tools; Step N2, mixing module: After weighing the required epoxy resin and additives, add them into the mixer in sequence and stir them to prepare the required resin slurry.

6. The method for preparing a corrosion-resistant carbon fiber material according to claim 2, characterized in that: The finished product preparation unit includes an impregnation module, a curing module and a post-processing module, and specifically includes the following steps: Step M1, impregnation module: immerse the carbon fiber in the resin slurry to allow the resin slurry to fully penetrate the carbon fiber; Step M2, curing module: hardening the resin slurry by thermal curing or UV curing to form a corrosion-resistant composite material; Step M3, post-processing module: cutting, shaping and surface repairing the obtained corrosion-resistant composite material.

7. The method for preparing a corrosion-resistant carbon fiber material according to claim 2, characterized in that: The performance testing unit includes a mechanical performance testing module and a corrosion resistance testing module, and specifically includes the following steps: Step V1, mechanical properties test module: perform tensile strength, bending strength and impact toughness tests on the post-processed corrosion-resistant composite material; Step V2, corrosion resistance test module: perform immersion tests in different chemical environments to observe corrosion resistance.

8. The method for preparing a corrosion-resistant carbon fiber material according to claim 5, characterized in that: The preservative additive selected in step N1 is specifically fluoride, the antioxidant additive is specifically trishydroxymethylaminomethane, the inorganic filler additive is specifically silicate, and the modified resin additive is specifically polyethylene terephthalate.

9. The method for preparing a corrosion-resistant carbon fiber material according to claim 5, characterized in that: The mixing process in step N2 is specifically that the mixer speed is between 300 and 1000 rpm for 10 to 30 minutes, so that the additive is completely dispersed and evenly mixed with the resin.

Images