A thermoplastic carbon fiber wheel hub insert and its preparation method

Abstract

The present invention discloses a thermoplastic carbon fiber wheel hub insert and a preparation method thereof, relating to the technical field of carbon fiber composite materials, and comprising the following components: carbon fiber, composite modified thermoplastic resin, and curing agent; wherein, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the composite modified thermoplastic resin is formed by mixing epoxy resin with a hybridizing auxiliary agent; the curing agent is triethylenetetramine; the thermoplastic carbon fiber wheel hub insert prepared by the present invention not only has higher mechanical properties compared with the aluminum alloy wheel hub insert prepared by the prior art, but also has various characteristics such as light weight and high wear resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon fiber composite materials, and particularly relates to a thermoplastic carbon fiber wheel hub insert and a preparation method thereof. Background Art

[0002] With the continuous attention to climate issues, the trend of developing new energy vehicles by reducing fuel vehicles is becoming increasingly obvious. Since new energy vehicles do not emit greenhouse gases and do not cause damage to the climate, they conform to the current theme of green environmental protection.

[0003] As is well known compared with fuel vehicles, new energy vehicles mainly obtain power through batteries. Among them, new energy vehicles mainly use the three-electric systems of batteries, motors, and electronic controls. Although this system can effectively increase the application ability of new energy vehicles and also improve the technical level of new energy vehicles, the entire system greatly increases the self-weight of new energy vehicles, seriously affecting the power, braking, safety, endurance, and battery consumption ability of new energy vehicles.

[0004] According to data research, when the self-weight of new energy vehicles is reduced by 20%, the endurance can be effectively increased by about 5%-10%, the battery cost can be effectively saved by about 15%-120%, and the loss of new energy vehicles during daily use can be effectively reduced. Therefore, the demand to reduce the self-weight of new energy vehicles is very urgent.

[0005] The use of carbon fiber materials can replace traditional aluminum alloy parts. Compared with aluminum alloy parts, the weight of carbon fiber is 40-50% lighter than that of aluminum alloy, greatly reducing the weight of the whole new energy vehicle and improving the endurance of new energy vehicles, and the carbon fiber wheel hub insert.

[0006] Based on this, a thermoplastic carbon fiber wheel hub insert and a preparation method thereof are provided to solve the existing technical problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a thermoplastic carbon fiber wheel hub insert and a preparation method thereof to solve the deficiencies in the prior art.

[0008] The technical solution adopted by the present invention is as follows:

[0009] A thermoplastic carbon fiber wheel hub insert includes the following components by weight:

[0010] 100-125 parts of carbon fiber, 30-38 parts of composite modified thermoplastic resin, 15-18 parts of curing agent;

[0011] Wherein, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin;

[0012] The composite modified thermoplastic resin is formed by mixing epoxy resin and a hybrid assistant;

[0013] The curing agent is triethylenetetramine.

[0014] As a further technical solution, the preparation method of the composite modified thermoplastic resin is as follows:

[0015] Add the hybrid assistant to the epoxy resin, stir at a speed of 150 r / min for 30 min, and after mixing evenly, obtain the composite modified thermoplastic resin.

[0016] As a further technical solution, the preparation method of the hybrid assistant includes the following steps:

[0017] (1) Place bentonite in an inert atmosphere, carry out calcination treatment for 40 - 45 min, and then naturally cool to room temperature to obtain calcined bentonite;

[0018] (2) Add the calcined bentonite and 2 - ethyl - 4 - methylimidazole complex to an organic solvent in sequence, and stir for 2 hours to obtain a dispersion;

[0019] (3) Add nano - boron nitride to the dispersion, adjust the temperature to 75 - 78 °C, keep warm and stir for 1 hour, stand for 48 hours, and then carry out suction filtration and dry to constant weight to obtain the hybrid assistant.

[0020] As a further technical solution, in step (1), the inert atmosphere is any one of nitrogen and neon;

[0021] The calcination temperature of the calcination treatment is 420 - 440 °C.

[0022] As a further technical solution, in step (2), the mixing ratio of the calcined bentonite, 2 - ethyl - 4 - methylimidazole complex, and the organic solvent is 12 - 14 g : 3 - 5 g : 200 mL;

[0023] The organic solvent is dichloromethane.

[0024] As a further technical solution, in step (3), the mixing ratio of the dispersion and nano - boron nitride is 150 mL : 1 - 2 g.

[0025] As a further technical solution, the plasma modification treatment is as follows:

[0026] First, put the carbon fiber into acetone, adjust the temperature to 80 °C, keep warm and stir for 30 min, and then carry out filtration and drying;

[0027] Carry out surface treatment on the carbon fiber after the above - mentioned treatment by using an atmospheric - pressure plasma surface treatment device.

[0028] As a further technical solution, the working frequency of the atmospheric pressure plasma surface treatment equipment is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0029] A preparation method of a thermoplastic carbon fiber hub insert includes the following steps:

[0030] S1. Weighing ingredients: Weigh carbon fiber, composite modified thermoplastic resin, and curing agent according to each weight part respectively;

[0031] S2. Embedding metal nuts: Embedding metal nuts into the cavity of the hub insert mold;

[0032] S3. Laying carbon fiber: Uniformly winding carbon fiber around the cavity of the hub insert mold;

[0033] S4. Injecting: Mixing the composite modified thermoplastic resin and the curing agent evenly, then evacuating the air in the cavity of the hub insert mold, and then injecting the composite modified thermoplastic resin. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, heating it to 155 - 160 °C and keeping it warm for 2 hours for curing and shaping;

[0034] S5. Demolding.

[0035] As a further technical solution: After demolding, carry out grinding and polishing, and after passing the inspection, package it.

[0036] Beneficial effects:

[0037] The thermoplastic carbon fiber hub insert prepared by the present invention not only has higher mechanical properties compared with the aluminum alloy hub insert prepared by the prior art, but also has multiple characteristics such as light weight and high wear resistance.

[0038] Carbon fiber is a special product composed of carbon elements, with a carbon content generally above 90%. It is a material with high strength and high modulus, and is formed by high-temperature oxidation and carbonization. Compared with other fibers, it has the characteristics of high temperature resistance, anti-friction, electrical heat conduction, corrosion resistance, etc. Moreover, carbon fiber materials have high tensile strength and low density. Compared with traditional metal materials, it has a light weight, high strength, and high toughness. Compared with plastic products, its strength is dozens of times that of plastic products. Based on this, in order to further improve the application performance of carbon fiber, the present invention conducts plasma modification treatment on carbon fiber, and then combines it with composite modified thermoplastic resin. After curing, a carbon fiber wheel hub insert is formed, and its quality is significantly improved. This is mainly because the plasma modification treatment of carbon fiber can greatly change the surface groups of carbon fiber and improve the surface affinity of carbon fiber, thereby greatly improving the interfacial compatibility between carbon fiber and composite modified thermoplastic resin. When carbon fiber is combined with composite modified thermoplastic resin, a chemical covalent bond is formed between the two, and the density of the manufactured carbon fiber wheel hub insert is greatly improved. At the same time, carbon fibers can mutually traction and disperse stress, which can greatly improve the wear resistance and mechanical properties of the carbon fiber wheel hub insert.

[0039] The present invention improves the performance of epoxy resin through composite modification. In the preparation process of the carbon fiber wheel hub insert in the present invention, composite modified thermoplastic resin is mainly used as the bonding matrix resin, and its performance is directly related to the overall performance of the carbon fiber wheel hub insert. After a series of improvement treatments on the matrix epoxy resin in the present invention, the obtained composite modified thermoplastic resin has high strength and stiffness, can withstand large pressure and impact; has high surface hardness, good wear resistance, and is not easily worn; has good corrosion resistance to chemical substances such as acids, alkalis, and salts; can withstand high temperatures and has good thermal stability; and it belongs to a recyclable material and will not cause pollution to the environment, which conforms to the concept of sustainable development in contemporary society. Based on this, the performance of the manufactured carbon fiber wheel hub insert is greatly improved and its service life is extended. Brief Description of the Drawings

[0040] Figure 1 It is a flow chart of a preparation method for a thermoplastic carbon fiber wheel hub insert. Detailed Embodiments

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] Example 1

[0043] A thermoplastic carbon fiber wheel hub insert, comprising the following components by weight:

[0044] 100 parts of carbon fiber, 30 parts of composite modified thermoplastic resin, 15 parts of triethylenetetramine;

[0045] Among them, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the plasma modification treatment is as follows:

[0046] First, put the carbon fiber into acetone, adjust the temperature to 80 °C, keep warm and stir for 30 min, then filter and dry;

[0047] The carbon fiber after the above treatment is subjected to surface treatment by an atmospheric pressure plasma surface treatment device; the working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0048] The composite modified thermoplastic resin is formed by mixing epoxy resin and hybrid auxiliary agent;

[0049] The preparation method of the composite modified thermoplastic resin is as follows:

[0050] Add the hybrid auxiliary agent to the epoxy resin, stir at a speed of 150 r / min for 30 min, and after mixing evenly, obtain the composite modified thermoplastic resin;

[0051] The epoxy resin is epoxy resin E51.

[0052] The preparation method of the hybrid auxiliary agent includes the following steps:

[0053] (1) Place bentonite under an inert atmosphere, carry out calcination treatment for 40 min, and then naturally cool to room temperature to obtain calcined bentonite; the inert atmosphere is nitrogen;

[0054] The calcination temperature of the calcination treatment is 420 °C.

[0055] (2) Add the calcined bentonite and 2-ethyl-4-methylimidazole complex to the organic solvent in sequence, and stir for 2 hours to obtain a dispersion; the mixing ratio of the calcined bentonite, 2-ethyl-4-methylimidazole complex and organic solvent is 12 g: 3 g: 200 mL;

[0056] The organic solvent is dichloromethane.

[0057] (3) Add nano boron nitride to the dispersion liquid, adjust the temperature to 75 °C, keep warm and stir for 1 hour, let it stand for 48 hours, then carry out suction filtration and dry until constant weight to obtain a hybrid auxiliary agent; the mixing ratio of the dispersion liquid to nano boron nitride is 150 mL: 1 g.

[0058] A preparation method of a thermoplastic carbon fiber hub insert, comprising the following steps:

[0059] S1. Batching: Weigh respectively according to each weight part: carbon fiber, composite modified thermoplastic resin, curing agent;

[0060] S2. Embedding metal nuts: Burry the metal nuts into the cavity of the hub insert mold;

[0061] S3. Laying carbon fiber: Wind the carbon fiber evenly around the cavity of the hub insert mold;

[0062] S4. Injection: Mix the composite modified thermoplastic resin and the curing agent evenly, then extract the air in the cavity of the hub insert mold, and then inject the composite modified thermoplastic resin. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, raise the temperature to 155 °C, keep warm for 2 hours, and carry out curing and shaping;

[0063] S5. Demolding; After demolding, carry out grinding and polishing, detect and package after passing the inspection.

[0064] Example 2

[0065] A thermoplastic carbon fiber hub insert, comprising the following components by weight parts:

[0066] 105 parts of carbon fiber, 32 parts of composite modified thermoplastic resin, 16 parts of triethylenetetramine;

[0067] Among them, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the plasma modification treatment is:

[0068] First, put the carbon fiber into acetone, adjust the temperature to 80 °C, keep warm and stir for 30 min, then carry out filtration and drying;

[0069] The carbon fiber after the above treatment is subjected to surface treatment by an atmospheric pressure plasma surface treatment device; the working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0070] The composite modified thermoplastic resin is formed by mixing epoxy resin with a hybrid auxiliary agent;

[0071] The preparation method of the composite modified thermoplastic resin is:

[0072] A hybridizing aid is added to the epoxy resin and stirred at a speed of 150 r / min for 30 min. After being uniformly mixed, a composite modified thermoplastic resin is obtained.

[0073] The epoxy resin is epoxy resin E51.

[0074] The preparation method of the hybridizing aid includes the following steps:

[0075] (1) The bentonite is placed under an inert atmosphere and calcined for 40 min, and then naturally cooled to room temperature to obtain calcined bentonite; the inert atmosphere is nitrogen;

[0076] The calcination temperature of the calcination treatment is 428 °C.

[0077] (2) The calcined bentonite and 2-ethyl-4-methylimidazole complex are sequentially added to the organic solvent and stirred for 2 hours to obtain a dispersion; the mixing ratio of the calcined bentonite, 2-ethyl-4-methylimidazole complex, and organic solvent is 13 g: 3.5 g: 200 mL;

[0078] The organic solvent is dichloromethane.

[0079] (3) Nano boron nitride is added to the dispersion, the temperature is adjusted to 76 °C, and it is kept warm and stirred for 1 hour, left standing for 48 hours, then filtered by suction and dried to constant weight to obtain the hybridizing aid; the mixing ratio of the dispersion and nano boron nitride is 150 mL: 1.2 g.

[0080] A preparation method of a thermoplastic carbon fiber hub insert includes the following steps:

[0081] S1. Batching: Weigh carbon fiber, composite modified thermoplastic resin, and curing agent respectively according to each weight part;

[0082] S2. Embedding metal nuts: The metal nuts are buried into the cavity of the hub insert mold;

[0083] S3. Carbon fiber laying: The carbon fiber is evenly wound around the cavity of the hub insert mold;

[0084] S4. Injection: The composite modified thermoplastic resin and the curing agent are uniformly mixed, then the air in the cavity of the hub insert mold is pumped out, and then the composite modified thermoplastic resin is injected. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, the temperature is raised to 156 °C and kept warm for 2 hours for curing and shaping;

[0085] S5. Demolding; After demolding, it is polished, inspected and qualified, and then packaged.

[0086] Example 3

[0087] A thermoplastic carbon fiber hub insert includes the following components by weight parts:

[0088] 110 parts of carbon fiber, 35 parts of composite modified thermoplastic resin, and 16 parts of triethylenetetramine;

[0089] Among them, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the plasma modification treatment is as follows:

[0090] First, put the carbon fiber into acetone, adjust the temperature to 80 °C, keep warm and stir for 30 min, then filter and dry;

[0091] The carbon fiber treated as above is subjected to surface treatment by an atmospheric pressure plasma surface treatment device; the working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0092] The composite modified thermoplastic resin is formed by mixing epoxy resin and a hybridizing aid;

[0093] The preparation method of the composite modified thermoplastic resin is as follows:

[0094] Add the hybridizing aid to the epoxy resin, stir at a speed of 150 r / min for 30 min, and after mixing evenly, obtain the composite modified thermoplastic resin;

[0095] The epoxy resin is epoxy resin E51.

[0096] The preparation method of the hybridizing aid includes the following steps:

[0097] (1) Place bentonite in an inert atmosphere, carry out calcination treatment for 40 min, and then naturally cool to room temperature to obtain calcined bentonite; the inert atmosphere is nitrogen;

[0098] The calcination temperature of the calcination treatment is 430 °C.

[0099] (2) Add the calcined bentonite and 2-ethyl-4-methylimidazole complex to the organic solvent in sequence, and stir for 2 hours to obtain a dispersion; the mixing ratio of the calcined bentonite, 2-ethyl-4-methylimidazole complex, and organic solvent is 13 g: 4 g: 200 mL;

[0100] The organic solvent is dichloromethane.

[0101] (3) Add nano boron nitride to the dispersion, adjust the temperature to 76 °C, keep warm and stir for 1 hour, stand for 48 hours, then carry out suction filtration and dry to constant weight to obtain the hybridizing aid; the mixing ratio of the dispersion and nano boron nitride is 150 mL: 1.5 g.

[0102] A preparation method of a thermoplastic carbon fiber wheel hub insert, including the following steps:

[0103] S1, Ingredients: Weigh separately according to each weight part: carbon fiber, composite modified thermoplastic resin, curing agent;

[0104] S2, Embedded metal nut: Embed the metal nut into the cavity of the hub insert mold;

[0105] S3, Carbon fiber laying: Wind the carbon fiber evenly around the cavity of the hub insert mold;

[0106] S4, Injection: Mix the composite modified thermoplastic resin and the curing agent evenly, then extract the air in the cavity of the hub insert mold, and then inject the composite modified thermoplastic resin. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, heat it up to 158 °C and keep it warm for 2 hours for curing and shaping;

[0107] S5, Demolding; After demolding, carry out grinding and polishing, and after passing the inspection, package.

[0108] Example 4

[0109] A thermoplastic carbon fiber hub insert, comprising the following components by weight parts:

[0110] 121 parts of carbon fiber, 35 parts of composite modified thermoplastic resin, 17 parts of triethylenetetramine;

[0111] Among them, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the plasma modification treatment is as follows:

[0112] First, put the carbon fiber into acetone, adjust the temperature to 80 °C, keep it warm and stir for 30 min, then filter and dry;

[0113] The carbon fiber after the above treatment is subjected to surface treatment by an atmospheric pressure plasma surface treatment device; the working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0114] The composite modified thermoplastic resin is formed by mixing epoxy resin and hybrid additives;

[0115] The preparation method of the composite modified thermoplastic resin is as follows:

[0116] Add the hybrid additives to the epoxy resin, stir at a speed of 150 r / min for 30 min, and after mixing evenly, obtain the composite modified thermoplastic resin;

[0117] The epoxy resin is epoxy resin E51.

[0118] The preparation method of the hybrid additives includes the following steps:

[0119] (1) placing bentonite in an inert atmosphere, calcining it for 43 minutes, and then naturally cooling it to room temperature to obtain calcined bentonite; the inert atmosphere is nitrogen;

[0120] The calcination temperature of the calcination treatment is 428°C.

[0121] (2) adding calcined bentonite and 2-ethyl-4-methylimidazole complex to an organic solvent in sequence and stirring for 2 hours to obtain a dispersion; the mixing ratio of calcined bentonite, 2-ethyl-4-methylimidazole complex and organic solvent is 13 g:4 g:200 mL;

[0122] The organic solvent is dichloromethane.

[0123] (3) Add nano boron nitride to the dispersion, adjust the temperature to 76°C, keep stirring for 1 hour, let stand for 48 hours, then filter and dry to constant weight to obtain a hybrid additive; the mixing ratio of dispersion and nano boron nitride is 150mL:1.8g.

[0124] A method for preparing a thermoplastic carbon fiber wheel hub insert comprises the following steps:

[0125] S1. Ingredients: weigh the following ingredients in parts by weight: carbon fiber, composite modified thermoplastic resin, and curing agent;

[0126] S2. Embedded metal nut: embed the metal nut into the cavity of the wheel hub insert mold;

[0127] S3, carbon fiber laying: evenly wind the carbon fiber into the wheel hub insert mold cavity;

[0128] S4, injection: the composite modified thermoplastic resin and the curing agent are mixed evenly, and then the air in the wheel hub plug-in mold cavity is extracted, and then the composite modified thermoplastic resin is injected. After the composite modified thermoplastic resin fills the wheel hub plug-in mold cavity, the temperature is raised to 158° C., kept warm for 2 hours, and cured and shaped;

[0129] S5, demoulding; after demoulding, grinding and polishing are carried out, and qualified inspection and packaging are carried out.

[0130] Example 5

[0131] A thermoplastic carbon fiber wheel hub insert comprises the following components in parts by weight:

[0132] 125 parts of carbon fiber, 38 parts of composite modified thermoplastic resin, 18 parts of triethylenetetramine;

[0133] Wherein, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the plasma modification treatment is:

[0134] First, put carbon fiber into acetone, adjust the temperature to 80 °C, keep warm and stir for 30 min, then filter and dry it;

[0135] Surface-treat the carbon fiber after the above treatment with an atmospheric pressure plasma surface treatment device; the working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0136] The composite modified thermoplastic resin is formed by mixing epoxy resin and a hybridizing assistant;

[0137] The preparation method of the composite modified thermoplastic resin is as follows:

[0138] Add the hybridizing assistant to the epoxy resin, stir at a speed of 150 r / min for 30 min, and after mixing evenly, obtain the composite modified thermoplastic resin;

[0139] The epoxy resin is epoxy resin E51.

[0140] The preparation method of the hybridizing assistant includes the following steps:

[0141] (1) Place bentonite in an inert atmosphere, carry out calcination treatment for 45 min, and then naturally cool to room temperature to obtain calcined bentonite; the inert atmosphere is nitrogen;

[0142] The calcination temperature of the calcination treatment is 440 °C.

[0143] (2) Add the calcined bentonite and 2-ethyl-4-methylimidazole complex to the organic solvent in sequence, and stir for 2 hours to obtain a dispersion; the mixing ratio of the calcined bentonite, 2-ethyl-4-methylimidazole complex, and organic solvent is 14 g: 5 g: 200 mL;

[0144] The organic solvent is dichloromethane.

[0145] (3) Add nano boron nitride to the dispersion, adjust the temperature to 78 °C, keep warm and stir for 1 hour, stand for 48 hours, then carry out suction filtration and dry to constant weight to obtain the hybridizing assistant; the mixing ratio of the dispersion and nano boron nitride is 150 mL: 2 g.

[0146] A preparation method of a thermoplastic carbon fiber hub insert includes the following steps:

[0147] S1. Weighing: Weigh carbon fiber, composite modified thermoplastic resin, and curing agent according to each weight part respectively;

[0148] S2. Embedding metal nuts: Embed metal nuts into the cavity of the hub insert mold;

[0149] S3. Carbon fiber laying: Uniformly wind the carbon fiber around the cavity of the hub insert mold;

[0150] S4. Injection: Mix the composite modified thermoplastic resin and the curing agent evenly, then evacuate the air in the cavity of the hub insert mold, and then inject the composite modified thermoplastic resin. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, raise the temperature to 160 °C and keep it warm for 2 hours for curing and shaping;

[0151] S5. Demolding; After demolding, perform grinding and polishing, and after passing the inspection, package.

[0152] Comparative Example 1:

[0153] A thermoplastic carbon fiber hub insert, comprising the following components by weight:

[0154] 105 parts of carbon fiber, 32 parts of epoxy resin E51, 16 parts of triethylenetetramine;

[0155] Among them, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified thermoplastic resin; the plasma modification treatment is as follows:

[0156] First, put the carbon fiber into acetone, adjust the temperature to 80 °C, keep it warm and stir for 30 min, then filter and dry;

[0157] The carbon fiber treated as above is subjected to surface treatment by an atmospheric pressure plasma surface treatment device; the working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

[0158] A preparation method of a thermoplastic carbon fiber hub insert, comprising the following steps:

[0159] S1. Batching: Weigh carbon fiber, composite modified thermoplastic resin, and curing agent respectively according to each weight part;

[0160] S2. Embedding metal nuts: Embed the metal nuts into the cavity of the hub insert mold;

[0161] S3. Carbon fiber laying: Uniformly wind the carbon fiber around the cavity of the hub insert mold;

[0162] S4. Injection: Mix the composite modified thermoplastic resin and the curing agent evenly, then evacuate the air in the cavity of the hub insert mold, and then inject the composite modified thermoplastic resin. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, raise the temperature to 156 °C and keep it warm for 2 hours for curing and shaping;

[0163] S5. Demolding; After demolding, perform grinding and polishing, and after passing the inspection, package.

[0164] Comparative Example 2:

[0165] A thermoplastic carbon fiber wheel hub insert, comprising the following components by weight:

[0166] 105 parts of carbon fiber, 32 parts of composite modified thermoplastic resin, 16 parts of triethylenetetramine;

[0167] The composite modified thermoplastic resin is formed by mixing epoxy resin and a hybridizing aid;

[0168] The preparation method of the composite modified thermoplastic resin is as follows:

[0169] Add the hybridizing aid to the epoxy resin, stir at a speed of 150 r / min for 30 min, and after mixing evenly, obtain the composite modified thermoplastic resin;

[0170] The epoxy resin is epoxy resin E51.

[0171] The preparation method of the hybridizing aid includes the following steps:

[0172] (1) Place bentonite in an inert atmosphere, carry out calcination treatment for 40 min, and then naturally cool to room temperature to obtain calcined bentonite; the inert atmosphere is nitrogen;

[0173] The calcination temperature of the calcination treatment is 428 °C.

[0174] (2) Add the calcined bentonite and 2-ethyl-4-methylimidazole complex to the organic solvent in sequence, stir for 2 hours to obtain a dispersion; the mixing ratio of the calcined bentonite, 2-ethyl-4-methylimidazole complex and the organic solvent is 13 g: 3.5 g: 200 mL;

[0175] The organic solvent is dichloromethane.

[0176] (3) Add nano boron nitride to the dispersion, adjust the temperature to 76 °C, keep warm and stir for 1 hour, stand for 48 hours, then carry out suction filtration and dry to constant weight to obtain the hybridizing aid; the mixing ratio of the dispersion and nano boron nitride is 150 mL: 1.2 g.

[0177] A preparation method of a thermoplastic carbon fiber wheel hub insert, comprising the following steps:

[0178] S1. Batching: Weigh carbon fiber, composite modified thermoplastic resin, and curing agent respectively according to each weight part;

[0179] S2. Embedding metal nuts: Burry the metal nuts into the cavity of the wheel hub insert mold;

[0180] S3. Carbon fiber laying: Wind the carbon fiber evenly around the cavity of the wheel hub insert mold;

[0181] S4. Injection: Mix the composite modified thermoplastic resin and the curing agent evenly, then evacuate the air in the cavity of the hub insert mold, and then inject the composite modified thermoplastic resin. After the composite modified thermoplastic resin fills the cavity of the hub insert mold, heat it up to 156 °C and keep it warm for 2 hours for curing and shaping;

[0182] S5. Demolding; After demolding, perform grinding and polishing, and after passing the inspection, package.

[0183] Test:

[0184] Make carbon fiber hub inserts of the same size and specification from the examples and comparative examples for testing:

[0185] Test the density according to GB / T30019:

[0186] Table 1

[0187] Density g / cm³ Example 1 1.38 Example 2 1.39 Example 3 1.44 Example 4 1.41 Example 5 1.43

[0188] As can be seen from Table 1, the carbon fiber hub inserts prepared by the present invention have a lower density. The density of aluminum alloy is 2.63 - 2.85 g / cm³. It can be seen that the mass of the carbon fiber hub inserts of the same size is lower.

[0189] Wear resistance test:

[0190] The friction testing machine used is a ring-block type friction testing machine M-200; the material of the friction pair is 45# carbon steel (AISI1045), with a Rockwell hardness of 42 and a surface roughness of 0.5. Dry friction testing is carried out at room temperature, the friction load mass is 12 kg, and the friction speed is 100 rpm / min; test the specimens of the examples and comparative examples respectively:

[0191] Table 2

[0192] <![CDATA[Wear volume × 10 -5 mm³ / Nm]]> Example 1 1.35 Example 2 1.26 Example 3 1.28 Example 4 1.29 Example 5 1.33 Comparative Example 1 5.27 Comparative Example 2 3.08

[0193] As can be seen from Table 2, the carbon fiber hub inserts of the present invention have high wear resistance.

[0194] Based on Example 2 as the basic specimen, compare the influence of different plasma modification treatment times on the wear resistance of carbon fiber hub inserts:

[0195] Table 3

[0196] Time / min <![CDATA[Wear volume × 10 -5 mm³ / Nm]]> 0 3.08 5 2.51 10 2.04 15 1.88 20 1.26 25 1.43 30 1.89

[0197] As can be seen from Table 3, with the extension of the plasma modification treatment time, the wear resistance of the carbon fiber inserts first increases and then decreases.

[0198] The above are only the preferred embodiments of the present invention, but the present invention is not limited to the scope of the embodiments shown. Any changes made according to the concept of the present invention, or equivalent embodiments modified into equivalent changes, should still be within the protection scope of the present invention when they do not exceed the spirit covered by the specification.

Claims

1. A carbon fiber wheel hub insert, characterized in that, By weight parts Comprising the following components: 100 - 125 parts of carbon fiber, 30 - 38 parts of composite modified resin, 15 - 18 parts of curing agent; the curing agent is triethylenetetramine; Wherein, the carbon fiber is subjected to plasma modification treatment before being mixed with the composite modified resin; The preparation method of the composite modified resin is: adding a hybridizing aid to epoxy resin, stirring at a speed of 150 r / min for 30 min, and after mixing evenly, obtaining the composite modified resin; The preparation method of the hybridizing aid comprises the following steps: (1) Placing bentonite in an inert atmosphere, performing calcination treatment for 40 - 45 min, and then naturally cooling to room temperature to obtain calcined bentonite; (2) Sequentially adding the calcined bentonite and 2 - ethyl - 4 - methylimidazole into an organic solvent, and stirring for 2 hours to obtain a dispersion; (3) Adding nano boron nitride to the dispersion, adjusting the temperature to 75 - 78 °C, keeping warm and stirring for 1 hour, standing for 48 hours, then performing suction filtration and drying to constant weight to obtain the hybridizing aid.

2. The carbon fiber wheel hub insert according to claim 1, wherein In step (1), the inert atmosphere is any one of nitrogen and neon; The calcination temperature of the calcination treatment is 420 - 440 °C.

3. A carbon fiber wheel hub insert according to claim 1, characterized in that, In step (2), the mixing ratio of the calcined bentonite, 2 - ethyl - 4 - methylimidazole, and the organic solvent is 12 - 14 g : 3 - 5 g : 200 mL; The organic solvent is dichloromethane.

4. A carbon fiber wheel hub insert according to claim 1, characterized in that, In step (3), the mixing ratio of the dispersion and nano boron nitride is 150 mL : 1 - 2 g.

5. A carbon fiber wheel hub insert according to claim 1, wherein The plasma modification treatment is as follows: First, putting the carbon fiber into acetone, adjusting the temperature to 80 °C, keeping warm and stirring for 30 min, then performing filtration and drying; Subjecting the carbon fiber after the above treatment to surface treatment with an atmospheric pressure plasma surface treatment device.

6. A carbon fiber wheel hub insert according to claim 5, characterized in that, The working frequency of the atmospheric pressure plasma surface treatment device is 10 kHz, the voltage is 8 kV, the voltage waveform is a sine wave, and the treatment time is 20 min.

7. The preparation method of a carbon fiber wheel hub insert according to claim 1, characterized in that: Comprising the following steps: S1. Batching: Weighing carbon fiber, composite modified resin, and curing agent according to each weight part respectively; S2. Embedding metal nuts: Embedding metal nuts into the cavity of the hub insert mold; S3. Carbon fiber laying: Uniformly winding the carbon fiber around the cavity of the hub insert mold; S4. Injection: Mixing the composite modified resin and the curing agent evenly, then pumping out the air in the cavity of the hub insert mold, and then injecting the composite modified resin. After the composite modified resin fills the cavity of the hub insert mold, heating to 155 - 160 °C, keeping warm for 2 hours, and curing and shaping; S5. Demolding.

8. The preparation method of a carbon fiber wheel hub insert according to claim 7, characterized in that: After demolding, perform grinding and polishing, and after passing the inspection, package.

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