Environment-friendly synthetic metal drawing lubricating oil and preparation method thereof

Abstract

The application provides an environmentally-friendly synthetic metal drawing lubricating oil, which comprises, by weight percentage, polyisobutylene: 30.0-45.0%, vegetable oil: 5.0-30.0%, surfactant: 1.0-5.0%, castor oil polyoxyethylene ether: 1.0-3.0%, benzotriazole: 0.3-0.5%, MgAl-LDH-TiO2-oxidized graphene: 0.2-0.5%, methyl silicone oil ester: 10-30 ppm, and synthetic base oil: the balance. The environmentally-friendly synthetic metal drawing lubricating oil prepared by the application has the characteristics of excellent lubricity, long service life, resistance to impurity oil pollution and low cost, and adopts hydrogenated base oil, low HLB surfactant with good lubricity and MgAl-LDH-TiO2-oxidized graphene.

Description

Technical Field

[0001] This invention relates to the field of lubricants, specifically to environmentally friendly synthetic metal drawing lubricants and their preparation methods. Background Technology

[0002] Wear is the surface damage or detachment of two contacting solid surfaces during sliding, rolling, or impact motion. In most cases, the interaction of surface micro-protrusions is the root cause of wear. Types of lubricants include liquid lubricants, semi-solid lubricants, solid lubricants, and gaseous lubricants. Liquid and semi-solid lubricants are the most widely used in industrial, agricultural, and military machinery. Improving and enhancing the friction-reducing and anti-wear properties of lubricants, and developing lubricants with superior performance, is one of the challenging issues facing the advancement of lubrication technology.

[0003] Metal drawing is a plastic forming process that reduces the cross-sectional area of ​​the material through die holes to obtain high-precision, high-gloss wires and tubes. It is an important method for producing wires and tubes, belonging to deformation processing, and is widely used in processing various metal materials such as carbon steel, stainless steel, alloy steel, copper, aluminum, and their alloys. It can produce thousands of different specifications and applications of products, ranging from rods and tubes with diameters from tens of millimeters to computer wires as small as a few micrometers. Typically, most of the energy consumed in drawing is lost in the friction between the die and the drawn material, causing an increase in interface temperature and making the lubricating film prone to rupture or even sintering.

[0004] In this process, good lubrication reduces the heat generated by friction during drawing, which helps extend die life, increase drawing speed, and improve the surface quality and mechanical properties of the drawn material, especially ensuring that the wire does not break during drawing. As drawing speeds continue to increase, more and more requirements are placed on drawing lubricants, which must have good lubrication and cooling properties, and must not affect the next processing step. Summary of the Invention

[0005] The technical problem to be solved: The purpose of this invention is to provide an environmentally friendly synthetic metal drawing lubricant, which uses hydrogenated base oil, combined with a low HLB surfactant with good lubricity and MgAl-LDH-TiO2-graphene oxide, and has the characteristics of excellent lubricity, long service life, resistance to contamination from other oils, and low cost.

[0006] Technical solution: An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0007] Polyisobutylene: 30.0%–45.0%

[0008] Vegetable oil: 5.0%–30.0%

[0009] Surfactant: 1.0–5.0%

[0010] Castor oil polyoxyethylene ether: 1.0–3.0%

[0011] Benzotriazole: 0.3–0.5%

[0012] MgAl-LDH-TiO2-graphene oxide: 0.2-0.5%

[0013] Methyl silicone oil: 10-30 ppm

[0014] Synthetic base oil: Balance.

[0015] Preferably, the base oil is a 60N hydrotreated base oil and / or a 100N hydrotreated base oil and / or a 150N hydrotreated base oil.

[0016] Preferably, the vegetable oil is industrial rapeseed oil and / or oxidized rapeseed oil and / or epoxidized soybean oil.

[0017] Preferably, the surfactant is any one of sorbitan monooleate, fatty alcohol polyoxyethylene (3) ether, and dodecylamine polyoxyethylene ether.

[0018] Preferably, the MgAl-LDH-TiO2-graphene oxide is prepared by the following steps:

[0019] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, and react at a certain temperature to generate amino-grafted TiO2 particles.

[0020] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 2-5 mg / mL; S3. Add graphene oxide to water to prepare a graphene oxide aqueous solution with a concentration of 0.3-0.8 mg / mL;

[0021] S4. Add the TiO2 aqueous solution prepared in step S2 to the graphene oxide aqueous solution at a volume ratio of 1:3-8 and stir for 1-3 hours. Filter and dry to obtain TiO2-graphene oxide.

[0022] S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1;

[0023] S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2;

[0024] S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 60-70℃, slowly add mixed solution 1 to the above solution, maintain the pH of the solution at 10, stir vigorously, and sonicate, and finally age for 2-5 hours, and filter to obtain MgAl-LDH-TiO2-graphene oxide.

[0025] Preferably, in step S1, the mass ratio of nano-TiO2 particles to aminosilane is 8-15:1, and the reaction temperature is 85-95℃.

[0026] Preferably, in step S7, the mass ratio of TiO2-graphene oxide to the total mass of magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:0.8-1.5.

[0027] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0028] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0029] (2) Mix polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester evenly, add to base oil, and add while stirring at a temperature of 60-70℃ to obtain environmentally friendly synthetic metal drawing lubricant.

[0030] Beneficial effects: The lubricating oil of the present invention has the following advantages:

[0031] 1. The drawing lubricant in this invention has good high temperature and high pressure resistance, strong adsorption force on metal surfaces, and can play a good role in reducing the coefficient of friction during the wire drawing process, thereby reducing energy consumption in the metal drawing process, improving the metal drawing effect, and improving product quality.

[0032] 2. In this invention, the base oil is a blend of synthetic base oil and vegetable oil. With a reasonable ratio, the compatibility and fusion between the base oil and the additives can be fully utilized, resulting in good lubrication performance.

[0033] 3. In this invention, multidimensional MgAl-LDH-TiO2-graphene oxide is used as an anti-wear and lubrication enhancer. The multidimensional composite reinforcing material can fill the scratches on the surface of the friction pair. Reinforcing materials of different dimensions and sizes can play a good synergistic effect in terms of friction and wear, and at the same time can enhance the lubrication performance during the drawing process and play a self-repairing role for scratch damage on the die surface. Detailed Implementation

[0034] The present invention will be further described below with reference to embodiments. These embodiments are illustrative of the present invention, but the present invention is not limited to these embodiments:

[0035] Example 1

[0036] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0037] Polyisobutylene: 45.0%

[0038] Industrial rapeseed oil: 5.0%

[0039] Sorbitol monooleate: 1.0%

[0040] Castor oil polyoxyethylene ether: 3.0%

[0041] Benzotriazole: 0.3%

[0042] MgAl-LDH-TiO2-graphene oxide: 0.2%

[0043] Methyl silicone oil: 10-30 ppm

[0044] 60N hydrotreated base oil: Balance;

[0045] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0046] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0047] (2) Polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester are mixed evenly and added to the base oil. The mixture is added while stirring at a temperature of 60°C to obtain an environmentally friendly synthetic metal drawing lubricant.

[0048] The MgAl-LDH-TiO2-graphene oxide is prepared through the following steps:

[0049] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, with a mass ratio of nano-TiO2 particles to aminosilane of 8:1, and react at 85℃ to generate amino-grafted TiO2 particles.

[0050] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 2 mg / mL;

[0051] S3. Add graphene oxide to water to prepare a 0.3 mg / mL graphene oxide aqueous solution;

[0052] S4. The TiO2 aqueous solution prepared in step S2 is added to the graphene oxide aqueous solution at a volume ratio of 1:3 and stirred for 3 hours. After filtration and drying, TiO2-graphene oxide is obtained.

[0053] S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1;

[0054] S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2;

[0055] S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 70°C, and slowly add mixed solution 1 to the above solution. The mass ratio of TiO2-graphene oxide to magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:0.8. Maintain the pH of the solution at 10, stir vigorously, and sonicate. Finally, age for 5 hours and filter to obtain MgAl-LDH-TiO2-graphene oxide.

[0056] Example 2

[0057] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0058] Polyisobutylene: 30.0%

[0059] Oxidized rapeseed oil: 30.0%

[0060] Fatty alcohol polyoxyethylene (3) ether: 5.0%

[0061] Castor oil polyoxyethylene ether: 1.0%

[0062] Benzotriazole: 0.5%

[0063] MgAl-LDH-TiO2-graphene oxide: 0.5%

[0064] Methyl silicone oil: 10-30 ppm

[0065] 100N hydrotreated base oil: Balance;

[0066] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0067] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0068] (2) Polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester are mixed evenly and added to the base oil. The mixture is added while stirring at a temperature of 70°C to obtain an environmentally friendly synthetic metal drawing lubricant.

[0069] The MgAl-LDH-TiO2-graphene oxide is prepared through the following steps:

[0070] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, with a mass ratio of nano-TiO2 particles to aminosilane of 15:1, and react at 95℃ to generate amino-grafted TiO2 particles.

[0071] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 5 mg / mL;

[0072] S3. Add graphene oxide to water to prepare a 0.8 mg / mL graphene oxide aqueous solution;

[0073] S4. The TiO2 aqueous solution prepared in step S2 is added to the graphene oxide aqueous solution at a volume ratio of 1:8 and stirred for 1 hour. After filtration and drying, TiO2-graphene oxide is obtained.

[0074] S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1;

[0075] S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2;

[0076] S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 60°C, and slowly add mixed solution 1 to the above solution. The mass ratio of TiO2-graphene oxide to magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:1.5. Maintain the pH of the solution at 10, stir vigorously, and sonicate. Finally, age for 2 hours and filter to obtain MgAl-LDH-TiO2-graphene oxide.

[0077] Example 3

[0078] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0079] Polyisobutylene: 40.0%

[0080] Epoxidized soybean oil: 20.0%

[0081] Fatty alcohol polyoxyethylene (3) ether: 2.0%

[0082] Castor oil polyoxyethylene ether: 2.5%

[0083] Benzotriazole: 0.5%

[0084] MgAl-LDH-TiO2-graphene oxide: 0.3%

[0085] Methyl silicone oil: 30ppm

[0086] 100N hydrotreated base oil: Balance;

[0087] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0088] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0089] (2) Polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester are mixed evenly and added to the base oil. The mixture is added while stirring at a temperature of 60°C to obtain an environmentally friendly synthetic metal drawing lubricant.

[0090] The MgAl-LDH-TiO2-graphene oxide is prepared through the following steps:

[0091] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, with a mass ratio of nano-TiO2 particles to aminosilane of 10:1, and react at 95℃ to generate amino-grafted TiO2 particles.

[0092] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 2.5 mg / mL;

[0093] S3. Add graphene oxide to water to prepare a 0.4 mg / mL graphene oxide aqueous solution;

[0094] S4. Add the TiO2 aqueous solution prepared in step S2 to the graphene oxide aqueous solution at a volume ratio of 1:5 and stir for 2-3 hours. Filter and dry to obtain TiO2-graphene oxide.

[0095] S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1;

[0096] S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2;

[0097] S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 70°C, and slowly add mixed solution 1 to the above solution. The mass ratio of TiO2-graphene oxide to magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:1. Maintain the pH of the solution at 10, stir vigorously, and sonicate. Finally, age for 4 hours and filter to obtain MgAl-LDH-TiO2-graphene oxide.

[0098] Example 4

[0099] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0100] Polyisobutylene: 33.0%

[0101] Oxidized rapeseed oil: 10.0%

[0102] Dodecylamine polyoxyethylene ether: 4.0%

[0103] Castor oil polyoxyethylene ether: 1.5%

[0104] Benzotriazole: 0.3%

[0105] MgAl-LDH-TiO2-graphene oxide: 0.4%

[0106] Methyl silicone oil: 10ppm

[0107] 150N hydrotreated base oil: Balance;

[0108] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0109] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0110] (2) Polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester are mixed evenly and added to the base oil. The mixture is added while stirring at a temperature of 70°C to obtain an environmentally friendly synthetic metal drawing lubricant.

[0111] The MgAl-LDH-TiO2-graphene oxide is prepared through the following steps:

[0112] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, and the mass ratio of nano-TiO2 particles to aminosilane is 14:1. React at 85℃ to generate amino-grafted TiO2 particles.

[0113] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 3.5 mg / mL;

[0114] S3. Add graphene oxide to water to prepare a 0.7 mg / mL graphene oxide aqueous solution;

[0115] S4. The TiO2 aqueous solution prepared in step S2 is added to the graphene oxide aqueous solution at a volume ratio of 1:7 and stirred for 3 hours. After filtration and drying, TiO2-graphene oxide is obtained.

[0116] S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1;

[0117] S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2;

[0118] S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 70°C, and slowly add mixed solution 1 to the above solution. The mass ratio of TiO2-graphene oxide to magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:1.4. Maintain the pH of the solution at 10, stir vigorously, and sonicate. Finally, age for 3 hours and filter to obtain MgAl-LDH-TiO2-graphene oxide.

[0119] Example 5

[0120] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0121] Polyisobutylene: 35%

[0122] Epoxidized soybean oil: 15%

[0123] Sorbitol monooleate: 3.0%

[0124] Castor oil polyoxyethylene ether: 2.0%

[0125] Benzotriazole: 0.4%

[0126] MgAl-LDH-TiO2-graphene oxide: 0.3%

[0127] Methyl silicone oil: 20ppm

[0128] 100N hydrotreated base oil: Balance;

[0129] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0130] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0131] (2) Mix polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester evenly, add to base oil, and add while stirring at a temperature of 65℃ to obtain environmentally friendly synthetic metal drawing lubricant.

[0132] The MgAl-LDH-TiO2-graphene oxide is prepared through the following steps:

[0133] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, and the mass ratio of nano-TiO2 particles to aminosilane is 12:1. React at 90℃ to generate amino-grafted TiO2 particles.

[0134] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 3 mg / mL;

[0135] S3. Add graphene oxide to water to prepare a 0.5 mg / mL graphene oxide aqueous solution;

[0136] S4. The TiO2 aqueous solution prepared in step S2 is added to the graphene oxide aqueous solution at a volume ratio of 1:6 and stirred for 2.5 h. After filtration and drying, TiO2-graphene oxide is obtained.

[0137] S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1;

[0138] S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2;

[0139] S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 65°C, and slowly add mixed solution 1 to the above solution. The mass ratio of TiO2-graphene oxide to magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:1.2. Maintain the pH of the solution at 10, stir vigorously, and sonicate. Finally, age for 3.5 h and filter to obtain MgAl-LDH-TiO2-graphene oxide.

[0140] Comparative Example 1

[0141] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0142] Polyisobutylene: 40.0%

[0143] Epoxidized soybean oil: 20.0%

[0144] Fatty alcohol polyoxyethylene (3) ether: 2.0%

[0145] Castor oil polyoxyethylene ether: 2.5%

[0146] Benzotriazole: 0.5%

[0147] TiO2: 0.2%

[0148] Graphene oxide: 0.3%

[0149] Methyl silicone oil: 30ppm

[0150] 100N hydrotreated base oil: Balance;

[0151] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0152] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0153] (2) Mix polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, TiO2, graphene oxide and methyl silicone ester evenly, add to base oil, and add while stirring at 60°C to obtain environmentally friendly synthetic metal drawing lubricant.

[0154] Comparative Example 2

[0155] An environmentally friendly synthetic metal drawing lubricant, comprising, by weight percentage:

[0156] Polyisobutylene: 33.0%

[0157] Oxidized rapeseed oil: 10.0%

[0158] Dodecylamine polyoxyethylene ether: 4.0%

[0159] Castor oil polyoxyethylene ether: 1.5%

[0160] Benzotriazole: 0.3%

[0161] TiO2-graphene oxide: 0.5%

[0162] Methyl silicone oil: 10ppm

[0163] 150N hydrotreated base oil: Balance;

[0164] The preparation method of the above-mentioned environmentally friendly synthetic metal drawing lubricant includes the following steps:

[0165] (1) Mix the synthetic base oil and vegetable oil evenly to obtain the base oil;

[0166] (2) Mix polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, TiO2-graphene oxide and methyl silicone ester evenly, add to base oil, and add while stirring at 70°C to obtain environmentally friendly synthetic metal drawing lubricant.

[0167] The TiO2-graphene oxide is prepared through the following steps:

[0168] S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, and the mass ratio of nano-TiO2 particles to aminosilane is 14:1. React at 85℃ to generate amino-grafted TiO2 particles.

[0169] S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 3.5 mg / mL;

[0170] S3. Add graphene oxide to water to prepare a 0.7 mg / mL graphene oxide aqueous solution;

[0171] S4. Add the TiO2 aqueous solution prepared in step S2 to the graphene oxide aqueous solution at a volume ratio of 1:7 and stir for 2-3 hours. Filter and dry to obtain TiO2-graphene oxide.

[0172] Performance tests of lubricating oils in the examples and comparative examples:

[0173] The sintering load tested using the lubricant load-carrying capacity determination method (four-ball method) (sintering load PD) shall not be less than 9700N (GB / T3142-2019);

[0174] The lubricant load-carrying capacity test method (four-ball method) is adopted (the maximum non-seize load PB test is not less than 1485N (GB / T3142-2019);

[0175] The wear resistance performance of lubricating oil was tested using the method (SH / T0189, the wear scar diameter is not greater than 0.18 mm).

[0176]

[0177] Other basic properties of the lubricating oil prepared in Example 1 were tested, as detailed in the table below:

[0178]

[0179]

[0180] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. An environmentally friendly synthetic metal drawing lubricant, characterized in that: By weight percentage, including: Polyisobutylene: 30.0%–45.0% Vegetable oil: 5.0%–30.0% Surfactant: 1.0–5.0% Castor oil polyoxyethylene ether: 1.0–3.0% Benzotriazole: 0.3–0.5% MgAl-LDH-TiO2-graphene oxide: 0.2-0.5% Methyl silicone oil: 10-30 ppm Synthetic base oil: Balance; The surfactant is any one of sorbitan monooleate, fatty alcohol polyoxyethylene (3) ether, and dodecylamine polyoxyethylene ether; The MgAl-LDH-TiO2-graphene oxide is prepared by the following steps: S1. Disperse nano-TiO2 particles in an aqueous ethanol solution using ultrasonication until uniform dispersion. Then, adjust the pH of the solution to 5, add aminosilane, and react at a certain temperature to generate amino-grafted TiO2 particles. S2. Add the amino-grafted TiO2 particles prepared in step S1 to water to prepare a TiO2 aqueous solution with a concentration of 2-5 mg / mL; S3. Add graphene oxide to water to prepare a 0.3-0.8 mg / mL graphene oxide aqueous solution; S4. Add the TiO2 aqueous solution prepared in step S2 to the graphene oxide aqueous solution at a volume ratio of 1:3-8 and stir for 1-3 hours. Filter and dry to obtain TiO2-graphene oxide. S5. Mix magnesium nitrate and aluminum nitrate in a molar ratio of 3:1, add to water, and obtain mixed solution 1; S6. Mix aminosilane and sodium dodecyl sulfonate in a molar ratio of 3:1, and add the mixture to an aqueous ethanol solution to obtain mixed solution 2; S7. Add the TiO2-graphene oxide prepared in step S4 to mixed solution 2, then heat the mixed solution to 60-70℃, slowly add mixed solution 1 to the above solution, maintain the pH of the solution at 10, stir vigorously, and sonicate, and finally age for 2-5 hours, and filter to obtain MgAl-LDH-TiO2-graphene oxide.

2. The environmentally friendly synthetic metal drawing lubricant according to claim 1, characterized in that: The base oil is a 60N hydrotreated base oil and / or a 100N hydrotreated base oil and / or a 150N hydrotreated base oil.

3. The environmentally friendly synthetic metal drawing lubricant according to claim 1, characterized in that: The vegetable oil is industrial rapeseed oil and / or oxidized rapeseed oil and / or epoxidized soybean oil.

4. The environmentally friendly synthetic metal drawing lubricant according to claim 1, characterized in that: In step S1, the mass ratio of nano-TiO2 particles to aminosilane is 8-15:1, and the reaction temperature is 85-95℃.

5. The environmentally friendly synthetic metal drawing lubricant according to claim 1, characterized in that: In step S7, the mass ratio of TiO2-graphene oxide to the total mass of magnesium nitrate and aluminum nitrate in mixed solution 1 is 10:0.8-1.

5.

6. The method for preparing the environmentally friendly synthetic metal drawing lubricant according to claim 1, characterized in that, Includes the following steps: The synthetic base oil and vegetable oil are mixed and stirred evenly to obtain the base oil; Polyisobutylene, surfactant, castor oil polyoxyethylene ether, benzotriazole, MgAl-LDH-TiO2-graphene oxide, and methyl silicone ester are mixed evenly and added to the base oil while stirring at a temperature of 60-70℃ to obtain an environmentally friendly synthetic metal drawing lubricant.

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