Preparation process of carbon fiber pipe

Abstract

The invention discloses a preparation process of a carbon fiber pipe, and relates to the technical field of carbon fiber pipes. The invention discloses a preparation process of a carbon fiber pipe. The preparation process comprises the following steps: S1, preparing a carbon fiber prepreg; s2, preparing a reinforced inner layer; s3, paving the prepared reinforced inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer; s4, the metal core rod is coated with a release agent; s5, the carbon fiber base layer is rolled on the metal core rod coated with the release agent, and a carbon fiber base tube is obtained; when the carbon fiber pipe is prepared, the carbon fiber prepreg and the reinforcing inner layer are combined for use, the overall strength, wear resistance and corrosion resistance of the carbon fiber pipe can be obviously improved, meanwhile, during preparation of the reinforcing inner layer in the carbon fiber pipe, reinforcing fibers are added, and the wear resistance and corrosion resistance of the carbon fiber pipe are improved. And the mechanical property of the reinforced inner layer can be effectively improved, so that the compression resistance and tensile strength of the carbon fiber pipe are further improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon fiber tubes, and in particular relates to a process for preparing carbon fiber tubes. Background Art

[0002] As a new type of structural material, carbon fiber composite materials are one of the ideal materials for building high-performance products. Carbon fiber composite materials have excellent physical properties, good specific strength, high specific stiffness, and their mechanical properties can be controlled and changed through design; carbon fiber has high strength, high modulus, high temperature resistance, corrosion resistance, fatigue resistance, creep resistance, electrical conductivity, heat transfer and other properties. It is a typical high-tech product and has been widely used in aerospace, sporting goods, industrial fields, transportation fields and civil engineering fields. At present, carbon fiber pipe fittings are widely used for their excellent performance.

[0003] However, the overall strength performance of carbon fiber tubes in the existing technology is not very high. Not only is the structure complex, but the function is single, the toughness is poor, and local parts are prone to breakage when bent. The overall strength needs to be further improved. At the same time, the overall wear resistance and corrosion resistance of carbon fiber tubes in the existing technology need to be further improved. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a carbon fiber tube preparation process that can overcome the above problems or at least partially solve the above problems.

[0005] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is: a carbon fiber tube preparation process, comprising the following steps:

[0006] Step S1, preparing carbon fiber prepreg;

[0007] Step S2, preparing a reinforced inner layer;

[0008] Step S3, laying the prepared reinforcing inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer;

[0009] Step S4: applying a release agent on the metal core rod;

[0010] Step S5: rolling the carbon fiber base layer onto a metal core rod coated with a release agent to obtain a carbon fiber base tube;

[0011] Step S6: Wrapping the carbon fiber base tube with a stretch film;

[0012] Step S7: placing the carbon fiber base tube wrapped with the wrapping film into an oven for curing;

[0013] Step S8: taking out the cured carbon fiber base tube and removing the surface wrapping film to obtain a carbon fiber tube.

[0014] Furthermore, the carbon fiber prepreg in step S1 comprises the following components by mass: 35-45 parts of modified resin, 50-60 parts of carbon fiber, and 5-10 parts of reinforcing agent;

[0015] The preparation steps of the carbon fiber prepreg include:

[0016] Step S101: taking a modified resin and adding it into a stirring device for high-speed crushing and stirring;

[0017] Step S102: heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution;

[0018] Step S103: applying the glue prepared in step S102 on the release paper;

[0019] Step S104: placing the release paper coated with glue between the pressing rollers;

[0020] Step S105, performing surface treatment on the carbon fiber;

[0021] Step S106, passing the treated carbon fiber through a pressing roller;

[0022] Step S107: The pressing roller is heated, and the carbon fibers are slowly passed through the pressing roller, pressed and cooled to obtain a carbon fiber prepreg.

[0023] Furthermore, the modified resin in step S101 includes high-performance resin and bio-based resin.

[0024] Furthermore, the surface treatment of the carbon fiber in step S105 includes plasma treatment and ultraviolet treatment;

[0025] During the plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers, thereby increasing the surface roughness of the carbon fibers.

[0026] Furthermore, the mass components of the reinforced inner layer in step S2 are: 30-35 parts of reinforcing resin, 30-35 parts of carbon fiber, and 30-35 parts of reinforcing fiber;

[0027] The steps of preparing the reinforced inner layer include:

[0028] Step S201: putting carbon fiber and reinforcing fiber into a grinder for grinding;

[0029] Step S202: sieving the crushed carbon fiber and reinforcing fiber;

[0030] Step S203: pouring the reinforced resin into a stirring device for high-speed crushing and stirring;

[0031] Step S204: heating the stirring device to melt the crushed resin in the stirring device;

[0032] Step S205: adding the sieved carbon fibers and reinforcing fibers into a stirring device;

[0033] Step S206: Continue heating the stirring device and stir thoroughly for 30 minutes;

[0034] Step S207, obtaining a reinforced base liquid after heat preservation;

[0035] Step S208: pouring the strengthening base liquid into the extruder to extrude the strengthening filaments;

[0036] Step S209: braiding the extruded reinforcing filaments to obtain a reinforced inner layer.

[0037] Furthermore, the reinforcing fibers include glass fibers, silicon carbide whiskers, stainless steel fibers and ultra-high molecular weight polyethylene fibers.

[0038] Furthermore, the mass ratio of the glass fiber, silicon carbide whisker, stainless steel fiber and ultra-high molecular weight polyethylene fiber is 1:1:1:1.

[0039] Furthermore, the thickness ratio of the carbon fiber prepreg to the reinforcing inner layer is 4:1.

[0040] Furthermore, the temperature of the curing furnace is 110-130° C., and the curing time is 80-100 minutes.

[0041] Furthermore, in step S202, when the crushed carbon fiber and reinforcing fiber are screened, the mesh size of the screening sieve is 10-30 meshes.

[0042] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention adopts a combination of carbon fiber prepreg and a reinforced inner layer when preparing the carbon fiber tube, which can significantly improve the overall strength and wear resistance and corrosion resistance of the carbon fiber tube. At the same time, when preparing the reinforced inner layer in the carbon fiber tube, reinforcing fibers are added, which can effectively improve the mechanical properties of the reinforced inner layer, thereby further improving the compressive and tensile strength of the carbon fiber tube. DETAILED DESCRIPTION

[0043] Example 1:

[0044] A carbon fiber tube preparation process comprises the following steps:

[0045] Step S1, preparing carbon fiber prepreg;

[0046] Step S2, preparing a reinforced inner layer;

[0047] Step S3, laying the prepared reinforcing inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer;

[0048] Step S4: applying a release agent on the metal core rod;

[0049] Step S5: rolling the carbon fiber base layer onto a metal core rod coated with a release agent to obtain a carbon fiber base tube;

[0050] Step S6: Wrapping the carbon fiber base tube with a stretch film;

[0051] Step S7: placing the carbon fiber base tube wrapped with the wrapping film into an oven for curing;

[0052] Step S8: taking out the cured carbon fiber base tube and removing the surface wrapping film to obtain a carbon fiber tube.

[0053] The mass composition of the carbon fiber prepreg in step S1 is: 40 parts of modified resin, 55 parts of carbon fiber, and 8 parts of reinforcing agent;

[0054] The preparation steps of carbon fiber prepreg include:

[0055] Step S101: taking a modified resin and adding it into a stirring device for high-speed crushing and stirring;

[0056] Step S102: heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution;

[0057] Step S103: applying the glue prepared in step S102 on the release paper;

[0058] Step S104: placing the release paper coated with glue between the pressing rollers;

[0059] Step S105, performing surface treatment on the carbon fiber;

[0060] Step S106, passing the treated carbon fiber through a pressing roller;

[0061] Step S107: The pressing roller is heated, and the carbon fibers are slowly passed through the pressing roller, pressed and cooled to obtain a carbon fiber prepreg.

[0062] The modified resin in step S101 includes a high-performance resin and a bio-based resin.

[0063] In step S105, when the carbon fiber is subjected to surface treatment, plasma treatment and ultraviolet treatment are included;

[0064] During plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers, increasing the surface roughness of the carbon fibers.

[0065] The mass composition of the reinforced inner layer in step S2 is: 33 parts of reinforcing resin, 33 parts of carbon fiber, and 34 parts of reinforcing fiber;

[0066] The steps for preparing the reinforced inner layer include:

[0067] Step S201: putting carbon fiber and reinforcing fiber into a grinder for grinding;

[0068] Step S202: sieving the crushed carbon fiber and reinforcing fiber;

[0069] Step S203: pouring the reinforced resin into a stirring device for high-speed crushing and stirring;

[0070] Step S204: heating the stirring device to melt the crushed resin in the stirring device;

[0071] Step S205: adding the sieved carbon fibers and reinforcing fibers into a stirring device;

[0072] Step S206: Continue heating the stirring device and stir thoroughly for 30 minutes;

[0073] Step S207, obtaining a reinforced base liquid after heat preservation;

[0074] Step S208: pouring the strengthening base liquid into the extruder to extrude the strengthening filaments;

[0075] Step S209: braiding the extruded reinforcing filaments to obtain a reinforced inner layer.

[0076] Reinforcement fibers include glass fiber, silicon carbide whiskers, stainless steel fiber, and ultra-high molecular weight polyethylene fiber.

[0077] The mass ratio of glass fiber, silicon carbide whisker, stainless steel fiber and ultra-high molecular weight polyethylene fiber is 1:1:1:1.

[0078] The thickness ratio of carbon fiber prepreg to reinforcing inner layer is 4:1.

[0079] The curing oven temperature is 110-130°C and the curing time is 90 minutes.

[0080] In step S202, when the crushed carbon fiber and reinforcing fiber are screened, the mesh size of the screening sieve is 20 meshes.

[0081] Example 2:

[0082] A carbon fiber tube preparation process comprises the following steps:

[0083] Step S1, preparing carbon fiber prepreg;

[0084] Step S2, preparing a reinforced inner layer;

[0085] Step S3, laying the prepared reinforcing inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer;

[0086] Step S4: applying a release agent on the metal core rod;

[0087] Step S5: rolling the carbon fiber base layer onto a metal core rod coated with a release agent to obtain a carbon fiber base tube;

[0088] Step S6: Wrapping the carbon fiber base tube with a stretch film;

[0089] Step S7: placing the carbon fiber base tube wrapped with the wrapping film into an oven for curing;

[0090] Step S8: taking out the cured carbon fiber base tube and removing the surface wrapping film to obtain a carbon fiber tube.

[0091] The mass composition of the carbon fiber prepreg in step S1 is: 35 parts of modified resin, 50 parts of carbon fiber, and 5 parts of reinforcing agent;

[0092] The preparation steps of carbon fiber prepreg include:

[0093] Step S101: taking a modified resin and adding it into a stirring device for high-speed crushing and stirring;

[0094] Step S102: heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution;

[0095] Step S103: applying the glue prepared in step S102 on the release paper;

[0096] Step S104: placing the release paper coated with glue between the pressing rollers;

[0097] Step S105, performing surface treatment on the carbon fiber;

[0098] Step S106, passing the treated carbon fiber through a pressing roller;

[0099] Step S107: The pressing roller is heated, and the carbon fibers are slowly passed through the pressing roller, pressed and cooled to obtain a carbon fiber prepreg.

[0100] The modified resin in step S101 includes a high-performance resin and a bio-based resin.

[0101] In step S105, when the carbon fiber is subjected to surface treatment, plasma treatment and ultraviolet treatment are included;

[0102] During plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers, increasing the surface roughness of the carbon fibers.

[0103] The mass composition of the reinforced inner layer in step S2 is: 30 parts of reinforcing resin, 30 parts of carbon fiber, and 40 parts of reinforcing fiber;

[0104] The steps for preparing the reinforced inner layer include:

[0105] Step S201: putting carbon fiber and reinforcing fiber into a grinder for grinding;

[0106] Step S202: sieving the crushed carbon fiber and reinforcing fiber;

[0107] Step S203: pouring the reinforced resin into a stirring device for high-speed crushing and stirring;

[0108] Step S204: heating the stirring device to melt the crushed resin in the stirring device;

[0109] Step S205: adding the sieved carbon fibers and reinforcing fibers into a stirring device;

[0110] Step S206: Continue heating the stirring device and stir thoroughly for 30 minutes;

[0111] Step S207, obtaining a reinforced base liquid after heat preservation;

[0112] Step S208: pouring the strengthening base liquid into the extruder to extrude the strengthening filaments;

[0113] Step S209: braiding the extruded reinforcing filaments to obtain a reinforced inner layer.

[0114] Reinforcement fibers include glass fiber, silicon carbide whiskers, stainless steel fiber, and ultra-high molecular weight polyethylene fiber.

[0115] The mass ratio of glass fiber, silicon carbide whisker, stainless steel fiber and ultra-high molecular weight polyethylene fiber is 1:1:1:1.

[0116] The thickness ratio of carbon fiber prepreg to reinforcing inner layer is 4:1.

[0117] The curing oven temperature is 110-130°C and the curing time is 90 minutes.

[0118] In step S202, when the crushed carbon fiber and reinforcing fiber are screened, the mesh size of the screening sieve is 20 meshes.

[0119] Example 3:

[0120] A carbon fiber tube preparation process comprises the following steps:

[0121] Step S1, preparing carbon fiber prepreg;

[0122] Step S2, preparing a reinforced inner layer;

[0123] Step S3, laying the prepared reinforcing inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer;

[0124] Step S4: applying a release agent on the metal core rod;

[0125] Step S5: rolling the carbon fiber base layer onto a metal core rod coated with a release agent to obtain a carbon fiber base tube;

[0126] Step S6: Wrapping the carbon fiber base tube with a stretch film;

[0127] Step S7: placing the carbon fiber base tube wrapped with the wrapping film into an oven for curing;

[0128] Step S8: taking out the cured carbon fiber base tube and removing the surface wrapping film to obtain a carbon fiber tube.

[0129] The mass composition of the carbon fiber prepreg in step S1 is: 45 parts of modified resin, 60 parts of carbon fiber, and 10 parts of reinforcing agent;

[0130] The preparation steps of carbon fiber prepreg include:

[0131] Step S101: taking a modified resin and adding it into a stirring device for high-speed crushing and stirring;

[0132] Step S102: heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution;

[0133] Step S103: applying the glue prepared in step S102 on the release paper;

[0134] Step S104: placing the release paper coated with glue between the pressing rollers;

[0135] Step S105, performing surface treatment on the carbon fiber;

[0136] Step S106, passing the treated carbon fiber through a pressing roller;

[0137] Step S107: The pressing roller is heated, and the carbon fibers are slowly passed through the pressing roller, pressed and cooled to obtain a carbon fiber prepreg.

[0138] The modified resin in step S101 includes a high-performance resin and a bio-based resin.

[0139] In step S105, when the carbon fiber is subjected to surface treatment, plasma treatment and ultraviolet treatment are included;

[0140] During plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers, increasing the surface roughness of the carbon fibers.

[0141] The mass composition of the reinforced inner layer in step S2 is: 40 parts of reinforcing resin, 30 parts of carbon fiber, and 30 parts of reinforcing fiber;

[0142] The steps for preparing the reinforced inner layer include:

[0143] Step S201: putting carbon fiber and reinforcing fiber into a grinder for grinding;

[0144] Step S202: sieving the crushed carbon fiber and reinforcing fiber;

[0145] Step S203: pouring the reinforced resin into a stirring device for high-speed crushing and stirring;

[0146] Step S204: heating the stirring device to melt the crushed resin in the stirring device;

[0147] Step S205: adding the sieved carbon fibers and reinforcing fibers into a stirring device;

[0148] Step S206: Continue heating the stirring device and stir thoroughly for 30 minutes;

[0149] Step S207, obtaining a reinforced base liquid after heat preservation;

[0150] Step S208: pouring the strengthening base liquid into the extruder to extrude the strengthening filaments;

[0151] Step S209: braiding the extruded reinforcing filaments to obtain a reinforced inner layer.

[0152] Reinforcement fibers include glass fiber, silicon carbide whiskers, stainless steel fiber, and ultra-high molecular weight polyethylene fiber.

[0153] The mass ratio of glass fiber, silicon carbide whisker, stainless steel fiber and ultra-high molecular weight polyethylene fiber is 1:1:1:1.

[0154] The thickness ratio of carbon fiber prepreg to reinforcing inner layer is 4:1.

[0155] The curing oven temperature is 110-130°C and the curing time is 90 minutes.

[0156] In step S202, when the crushed carbon fiber and reinforcing fiber are screened, the mesh size of the screening sieve is 20 meshes.

[0157] Comparative Example 1:

[0158] A carbon fiber tube preparation process comprises the following steps:

[0159] Step S1, preparing carbon fiber prepreg;

[0160] Step S2: applying a release agent on the metal core rod;

[0161] Step S3, rolling the carbon fiber prepreg onto a metal core rod coated with a release agent to obtain a carbon fiber base tube;

[0162] Step S4, wrapping the carbon fiber base tube with a stretch film;

[0163] Step S5: placing the carbon fiber base tube wrapped with the wrapping film into an oven for curing;

[0164] Step S6: taking out the cured carbon fiber base tube and removing the surface wrapping film to obtain a carbon fiber tube.

[0165] The mass composition of the carbon fiber prepreg in step S1 is: 40 parts of modified resin, 55 parts of carbon fiber, and 8 parts of reinforcing agent;

[0166] The preparation steps of carbon fiber prepreg include:

[0167] Step S101: taking a modified resin and adding it into a stirring device for high-speed crushing and stirring;

[0168] Step S102: heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution;

[0169] Step S103: applying the glue prepared in step S102 on the release paper;

[0170] Step S104: placing the release paper coated with glue between the pressing rollers;

[0171] Step S105, performing surface treatment on the carbon fiber;

[0172] Step S106, passing the treated carbon fiber through a pressing roller;

[0173] Step S107: The pressing roller is heated, and the carbon fibers are slowly passed through the pressing roller, pressed and cooled to obtain a carbon fiber prepreg.

[0174] The modified resin in step S101 includes a high-performance resin and a bio-based resin.

[0175] In step S105, when the carbon fiber is subjected to surface treatment, plasma treatment and ultraviolet treatment are included;

[0176] During plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers, increasing the surface roughness of the carbon fibers.

[0177] The mass ratio of glass fiber, silicon carbide whisker, stainless steel fiber and ultra-high molecular weight polyethylene fiber is 1:1:1:1.

[0178] The thickness ratio of carbon fiber prepreg to reinforcing inner layer is 4:1.

[0179] The curing oven temperature is 110-130°C and the curing time is 90 minutes.

[0180] Comparative Example 2:

[0181] A carbon fiber tube preparation process comprises the following steps:

[0182] Step S1, preparing carbon fiber prepreg;

[0183] Step S2, preparing a reinforced inner layer;

[0184] Step S3, laying the prepared reinforcing inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer;

[0185] Step S4: applying a release agent on the metal core rod;

[0186] Step S5: rolling the carbon fiber base layer onto a metal core rod coated with a release agent to obtain a carbon fiber base tube;

[0187] Step S6: Wrapping the carbon fiber base tube with a stretch film;

[0188] Step S7: placing the carbon fiber base tube wrapped with the wrapping film into an oven for curing;

[0189] Step S8: taking out the cured carbon fiber base tube and removing the surface wrapping film to obtain a carbon fiber tube.

[0190] The mass composition of the carbon fiber prepreg in step S1 is: 40 parts of modified resin, 55 parts of carbon fiber, and 8 parts of reinforcing agent;

[0191] The preparation steps of carbon fiber prepreg include:

[0192] Step S101: taking a modified resin and adding it into a stirring device for high-speed crushing and stirring;

[0193] Step S102: heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution;

[0194] Step S103: applying the glue prepared in step S102 on the release paper;

[0195] Step S104: placing the release paper coated with glue between the pressing rollers;

[0196] Step S105, performing surface treatment on the carbon fiber;

[0197] Step S106, passing the treated carbon fiber through a pressing roller;

[0198] Step S107: The pressing roller is heated, and the carbon fibers are slowly passed through the pressing roller, pressed and cooled to obtain a carbon fiber prepreg.

[0199] The modified resin in step S101 includes a high-performance resin and a bio-based resin.

[0200] In step S105, when the carbon fiber is subjected to surface treatment, plasma treatment and ultraviolet treatment are included;

[0201] During plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers, increasing the surface roughness of the carbon fibers.

[0202] The mass composition of the reinforced inner layer in step S2 is: 55 parts of reinforcing resin and 45 parts of reinforcing fiber;

[0203] The steps for preparing the reinforced inner layer include:

[0204] Step S201: Put the reinforcing fibers into a grinder for grinding;

[0205] Step S202: sieving the crushed reinforcement fibers;

[0206] Step S203: pouring the reinforced resin into a stirring device for high-speed crushing and stirring;

[0207] Step S204: heating the stirring device to melt the crushed resin in the stirring device;

[0208] Step S205: adding the sieved reinforcement fibers into a stirring device;

[0209] Step S206: Continue heating the stirring device and stir thoroughly for 30 minutes;

[0210] Step S207, obtaining a reinforced base liquid after heat preservation;

[0211] Step S208: pouring the strengthening base liquid into the extruder to extrude the strengthening filaments;

[0212] Step S209: braiding the extruded reinforcing filaments to obtain a reinforced inner layer.

[0213] Reinforcement fibers include glass fiber, silicon carbide whiskers, stainless steel fiber, and ultra-high molecular weight polyethylene fiber.

[0214] The mass ratio of glass fiber, silicon carbide whisker, stainless steel fiber and ultra-high molecular weight polyethylene fiber is 1:1:1:1.

[0215] The thickness ratio of carbon fiber prepreg to reinforcing inner layer is 4:1.

[0216] The curing oven temperature is 110-130°C and the curing time is 90 minutes.

[0217] In step S202, when the crushed reinforcement fibers are screened, the mesh size of the screen is 20 meshes.

[0218] The carbon fiber tubes prepared in Examples 1-3 and the tubes prepared in Comparative Examples 1-2 were subjected to performance tests. The test contents and test methods are as follows:

[0219] Bending strength test: Five groups of carbon fiber tubes were placed on a bending machine to test the maximum bending angle of the tubes;

[0220] Shear strength test: Five groups of carbon fiber tubes were placed on a shearing machine to test the maximum shear force of the tubes;

[0221] Tensile strength test: Five groups of carbon fiber tubes were placed on a tensile machine to test the maximum tensile force;

[0222] Wear resistance test: Five groups of carbon fiber tubes were placed on a grinding machine to test the wear resistance of the tube sidewalls.

[0223] Corrosion resistance test: Five groups of carbon fiber tubes were placed in an acid solution for corrosion resistance testing;

[0224] It should be noted that when conducting the corrosion resistance test, the acid solution is dilute hydrochloric acid with a concentration of 5%. The above test data are statistically recorded, and the specific data are as follows:

[0225]

[0226] Table 1

[0227] Referring to Examples 1-3 and Table 1, the present invention can significantly improve the overall strength, wear resistance and corrosion resistance of the carbon fiber tube by using a combination of carbon fiber prepreg and a reinforced inner layer when preparing the carbon fiber tube. At the same time, reinforcing fibers are added to the reinforced inner layer of the carbon fiber tube during preparation, which can effectively improve the mechanical properties of the reinforced inner layer, thereby further improving the compressive and tensile strength of the carbon fiber tube.

[0228] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A carbon fiber tube preparation process, characterized in that: The following steps are involved: Step S1, preparing carbon fiber prepreg; Step S2, preparing a reinforced inner layer; Step S3, laying the prepared reinforcing inner layer on the carbon fiber prepreg to obtain a carbon fiber base layer; Step S4, coating a release agent on the metal core rod; Step S5, rolling the carbon fiber base layer onto a metal core rod coated with a release agent to obtain a carbon fiber base tube; Step S6, wrapping a wrapping film on the carbon fiber base tube; Step S7, placing the carbon fiber base tube wrapped with the winding film into an oven for curing; Step S8, taking out the cured carbon fiber base tube, and removing the surface wrapping film to obtain a carbon fiber tube.

2. A carbon fiber tube preparation process according to claim 1, characterized in that: The mass components of the carbon fiber prepreg in step S1 are: 35-45 parts of modified resin, 50-60 parts of carbon fiber, and 5-10 parts of reinforcing agent; The preparation steps of the carbon fiber prepreg include: Step S101, taking the modified resin and adding it into a stirring device for high-speed crushing and stirring; Step S102, heating the stirring device, adding the reinforcing agent into the stirring device, and stirring again for 30 minutes to obtain a modified adhesive solution; Step S103, applying the glue prepared in step S102 on the release paper; Step S104, placing the release paper coated with glue between the pressure rollers; Step S105, performing surface treatment on the carbon fiber; Step S106, passing the treated carbon fiber through a pressing roller; Step S107, the pressing roller is heated up, and the carbon fiber is slowly passed through the pressing roller, pressed and cooled to obtain the carbon fiber prepreg.

3. A carbon fiber tube preparation process according to claim 2, characterized in that: The modified resin in step S101 includes high-performance resin and bio-based resin.

4. A carbon fiber tube preparation process according to claim 2, characterized in that: The surface treatment of the carbon fiber in step S105 includes plasma treatment and ultraviolet treatment; During the plasma treatment, the carbon fibers are fed into a plasma treatment chamber, and the plasma in the plasma treatment chamber impacts the surface of the carbon fibers to increase the surface roughness of the carbon fibers.

5. A carbon fiber tube preparation process according to claim 1, characterized in that: The mass components of the reinforced inner layer in step S2 are: 30-35 parts of reinforcing resin, 30-35 parts of carbon fiber, and 30-35 parts of reinforcing fiber; The steps of preparing the reinforced inner layer include: Step S201, putting carbon fiber and reinforcing fiber into a grinder for grinding; Step S202, sieving the crushed carbon fiber and reinforcing fiber; Step S203, pouring the reinforced resin into a stirring device for high-speed crushing and stirring; Step S204, heating the stirring device to melt the crushed resin in the stirring device; Step S205, adding the sieved carbon fiber and reinforcing fiber into a stirring device; Step S206, continue to heat up the stirring device and stir thoroughly for 30 minutes; Step S207, obtaining a reinforced base liquid after heat preservation; Step S208, pouring the strengthening base liquid into the extruder to extrude the strengthening filaments; Step S209: braiding the extruded reinforcing filaments to obtain a reinforced inner layer.

6. A carbon fiber tube preparation process according to claim 5, characterized in that: The reinforcing fibers include glass fibers, silicon carbide whiskers, stainless steel fibers and ultra-high molecular weight polyethylene fibers.

7. A carbon fiber tube preparation process according to claim 6, characterized in that: The mass ratio of the glass fiber, the silicon carbide whisker, the stainless steel fiber and the ultra-high molecular weight polyethylene fiber is 1:1:1:

1.

8. A carbon fiber tube preparation process according to claim 1, characterized in that: The thickness ratio of the carbon fiber prepreg to the reinforcing inner layer is 4:

1.

9. A carbon fiber tube preparation process according to claim 1, characterized in that: The curing furnace temperature is 110-130° C., and the curing time is 80-100 minutes.

10. A carbon fiber tube preparation process according to claim 5, characterized in that: In the step S202, when the crushed carbon fiber and reinforcing fiber are screened, the mesh number of the screen is 10-30 meshes.

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