Lubricating oil material and preparation method thereof

Abstract

The invention provides a preparation method of a lubricating oil material. The preparation method comprises the following steps: (1) weighing raw materials; (2) mixing and stirring oleic acid, linoleic acid and castor oil in corresponding parts by weight to obtain an oily mixture, and keeping a stirring state; and (3) mixing and heating stearic acid, dihydroxy stearic acid, modified polyol ester and an auxiliary agent in corresponding parts by weight, heating to 63-68 DEG C, and gradually adding into the oil mixture to obtain the plant-based synthetic oil. (4) heating the obtained plant-based synthetic oil to 43-48 DEG C, and then adding the preservative, the crystalline flake graphite, the bactericide, the defoaming agent and the water in corresponding parts by weight; and (5) finally, adding the viscosity index improver in corresponding parts by weight, and stirring at the rotating speed of 40-50rps for 20-30 minutes, thereby obtaining the product. The lubricating oil disclosed by the invention is good in degradability and high in lubricity, and has a wide market prospect and application value.

Description

Technical Field

[0001] The present invention belongs to the technical field of lubricating oils, and in particular relates to a lubricating oil material and a preparation method thereof. Background Art

[0002] Lubricants are widely used lubricants, primarily composed of base oils and additives, to reduce friction between moving parts and protect machinery and workpieces from wear. Lubricants play a vital role in various types of vehicles, industrial machinery, and equipment. Their functions include: Friction Reduction: They form a lubricating film between rubbing surfaces, reducing direct contact and thereby reducing frictional resistance and energy loss. Wear Reduction: The lubricating film supports loads, reduces wear and scratching on metal surfaces, and maintains component precision. Cooling: Circulating lubricants absorb and transfer heat generated by friction, helping to cool mechanical components. Corrosion Protection: The lubricant film isolates air, moisture, and corrosive substances, preventing rust and corrosion on metal surfaces. Vibration Damping: Lubricants absorb the energy of impact and vibration, providing damping and cushioning. Cleaning: They carry and remove dirt and wear particles from mechanical surfaces, maintaining internal cleanliness. Sealing: In some applications, lubricants also help form seals and prevent leaks. Power Transmission: In hydraulic systems, lubricants serve as a medium for power transmission.

[0003] Most of the most popular lubricants in the Chinese market are petroleum-based. These are difficult to degrade and remain in the environment for extended periods, seriously polluting soil and water resources and damaging the ecological environment. However, the vast majority of lubricants currently in use are still petroleum-based. Therefore, a method for preparing biodegradable lubricants is urgently needed. Summary of the Invention

[0004] The object of the present invention is to provide a lubricating oil material and a preparation method thereof.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A lubricating oil material comprises the following raw materials in parts by weight: 130-150 parts of plant-based synthetic oil, 3-7 parts of viscosity index improver, 1-3 parts of preservative, 7-10 parts of additive, 3-5 parts of flake graphite, 2-5 parts of fungicide, 3-6 parts of defoamer, 28-35 parts of modified polyol ester and 200-210 parts of water.

[0006] Preferably, the plant-based synthetic oil comprises the following components in parts by weight: 3-9 parts of oleic acid, 15-20 parts of linoleic acid, 50-60 parts of castor oil, 1-3 parts of stearic acid, and 1-3 parts of dihydroxystearic acid.

[0007] Preferably, the preparation method of the auxiliary agent is as follows: (1) calcining kaolin at a temperature of 920-940°C for 50-60 minutes, taking it out and immersing it in a silane coupling agent KH550, stirring it for 30-40 minutes, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 to 3 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 to 20 minutes.

[0008] A method for preparing a lubricating oil material comprises the following steps: (1) Weigh the following components in parts by weight: 130-150 parts of plant-based synthetic oil, 3-7 parts of viscosity index improver, 1-3 parts of preservative, 7-10 parts of additive, 3-5 parts of flake graphite, 2-5 parts of fungicide, 3-6 parts of defoamer, 28-35 parts of modified polyol ester and 200-210 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 3-9 parts of oleic acid, 15-20 parts of linoleic acid, 50-60 parts of castor oil, 1-3 parts of stearic acid and 1-3 parts of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63-68°C, and then gradually added to the oil mixture and stirred for 15-20 minutes to obtain a plant-based synthetic oil; (4) After heating the plant-based synthetic oil obtained above to 43-48°C, add corresponding weight parts of preservative, flake graphite, fungicide, defoamer and water, and stir at a speed of 50-60 rps for 10-20 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40-50 rps for 20-30 minutes.

[0009] Preferably, the modified liquid is composed of the following substances in corresponding parts by weight: 12-14 parts of hexadecyltrimethylammonium bromide, 6-9 parts of sodium hexametaphosphate, 10-14 parts of nonylphenol polyoxyethylene ether, 5-8 parts of nanomaterials, and 190-200 parts of water.

[0010] Preferably, the nanomaterial comprises nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1.2-1.5:0.5-0.8.

[0011] Preferably, the preparation method of the modified polyol ester is: (1) By weight, 32-35 parts of polyol, 40-60 parts of vegetable oil, solid super acid catalyst SO4 2- 3-5 parts of ZrO2 and 80-120 parts of ethanol are mixed evenly, and then heated to react to obtain a polyol ester; (2) The obtained polyol ester is subjected to vacuum distillation to evaporate the ethanol, and then 32-35 parts of formic acid are added. After the temperature is raised to 70-80°C, 23-30 parts of hydrogen peroxide are added dropwise. After the addition is completed, the temperature is kept for 2-3 hours, and the mixture is allowed to stand for stratification. The water layer is removed, and the oil layer is distilled. The fraction at 200-210°C is collected to obtain a modified polyol ester.

[0012] Preferably, the polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.4-0.6:1:1.5-1.8.

[0013] Preferably, the vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2-0.5:1:1.2-1.4; The viscosity index improver is ethylene bisstearamide; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether; the preservative is sodium diacetate; and the bactericide is methyl thiophanate.

[0014] Compared with the prior art, the advantages and beneficial effects of the present invention are: 1. This invention uses additives and calcination to remove organic impurities and adsorbed water from kaolin, improving its thermal stability and altering its crystal structure, making it more resilient to adsorption of other compounds. Silane coupling agent KH550: This coupling agent reacts with hydroxyl groups on the kaolin surface to form chemical bonds, increasing the kaolin's affinity for organic phases, thereby improving dispersibility and stability. Cetyltrimethylammonium bromide (CTAB): A cationic surfactant that enhances the dispersibility and stability of kaolin while also providing lubricity. Sodium hexametaphosphate: Chelates metal ions, preventing the hard water effect and improving the lubricant's corrosion resistance. Nonylphenol polyoxyethylene ether: A nonionic surfactant that enhances oil solubility, improving the lubricant's dispersibility and adhesion. Nanomaterials (calcium carbonate, silicon dioxide, titanium dioxide): Provide additional wear resistance and thermal stability, improving the lubricant's load-carrying capacity and high-temperature performance. Plasma irradiation further modifies the kaolin's surface chemistry, introducing more functional groups, enhancing its interaction with the lubricant matrix, and strengthening its functionality as an additive.

[0015] 2. The present invention simultaneously incorporates modified polyol esters, polyols (such as glycerol, pentaerythritol, and mannitol), vegetable oils (such as castor oil, palm oil, and soybean oil), and superacid catalysts, resulting in products with excellent low-temperature fluidity, oxidative stability, and good biodegradability. Subsequent treatment with formic acid and hydrogen peroxide can further improve the esterification product's properties, such as increasing extreme pressure (EP) and anti-wear (AW) properties.

[0016] In summary, the ingredients in modified polyol esters and additives can form a protective film on metal surfaces, reducing direct metal-to-metal contact and reducing wear. The modified esters and nanomaterials enhance the lubricant's stability at high temperatures, reduce oil oxidation, and extend its service life. Additives and modified polyol esters improve the lubricant's physical and chemical properties, enhancing its lubrication, cooling, corrosion protection, and cleansing functions, thereby improving overall lubrication performance. DETAILED DESCRIPTION

[0017] The following is a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0018] Example 1 This embodiment provides a method for preparing lubricating oil, which comprises the following steps: (1) Weigh the following components in parts by weight: 130 parts of plant-based synthetic oil, 3 parts of viscosity index improver, 1 part of preservative, 7 parts of additive, 3 parts of flake graphite, 2 parts of fungicide, 3 parts of defoamer, 28 parts of modified polyol ester and 200 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 3 parts of oleic acid, 15 parts of linoleic acid, 50 parts of castor oil, 1 part of stearic acid and 1 part of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63°C, and then gradually added to the oil mixture and stirred for 15 minutes to obtain a plant-based synthetic oil; (4) The plant-based synthetic oil obtained above was heated to 43°C, and then corresponding weight portions of preservative, flake graphite, fungicide, defoamer and water were added, and stirred at a speed of 50 rps for 10 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40 rps for 20 minutes.

[0019] The preparation method of the auxiliary agent is: (1) First, calcining kaolin at 920 ° C for 50 min, taking it out and immersing it in silane coupling agent KH550, stirring it for 30 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 minutes.

[0020] The modified liquid is composed of the following substances in corresponding parts by weight: 12 parts of hexadecyltrimethylammonium bromide, 6 parts of sodium hexametaphosphate, 10 parts of nonylphenol polyoxyethylene ether, 5 parts of nanomaterials, and 190 parts of water.

[0021] The nanomaterials include nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1.2:0.5.

[0022] The preparation method of modified polyol ester is: (1) By weight, 32 parts of polyol, 40 parts of vegetable oil, solid super acid catalyst SO4 2- 3 parts of ZrO2 and 80 parts of ethanol are mixed evenly, and then heated to react to obtain polyol ester; (2) The obtained polyol ester was subjected to vacuum distillation to remove ethanol, and then 32 parts of formic acid was added. After the temperature was raised to 70°C, 23 parts of hydrogen peroxide was added dropwise. After the addition was completed, the temperature was kept for 2 hours, and the mixture was allowed to stand for stratification. The water layer was removed, and the oil layer was distilled. The fraction at 200°C was collected to obtain a modified polyol ester.

[0023] The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.4:1:1.5.

[0024] The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2:1:1.2.

[0025] The viscosity index improver is ethylene bisstearamide.

[0026] The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0027] The preservative is sodium diacetate.

[0028] The fungicide is thiophanate methyl.

[0029] Example 2 This embodiment provides a method for preparing lubricating oil, which comprises the following steps: (1) Weigh the following components in parts by weight: 150 parts of plant-based synthetic oil, 7 parts of viscosity index improver, 3 parts of preservative, 10 parts of additive, 5 parts of flake graphite, 5 parts of fungicide, 6 parts of defoamer, 35 parts of modified polyol ester and 210 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 9 parts of oleic acid, 20 parts of linoleic acid, 60 parts of castor oil, 3 parts of stearic acid and 3 parts of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 68°C, and then gradually added to the oil mixture and stirred for 20 minutes to obtain a plant-based synthetic oil; (4) The plant-based synthetic oil obtained above was heated to 48°C, and then corresponding weight portions of preservative, flake graphite, fungicide, defoamer and water were added, and stirred at a speed of 60 rps for 20 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 50 rps for 30 minutes.

[0030] The preparation method of the auxiliary agent is: (1) First, calcining kaolin at 940 ° C for 60 min, taking it out and immersing it in silane coupling agent KH550, stirring it for 40 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 3 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 20 minutes.

[0031] The modified liquid is composed of the following substances in corresponding parts by weight: 14 parts of hexadecyltrimethylammonium bromide, 9 parts of sodium hexametaphosphate, 14 parts of nonylphenol polyoxyethylene ether, 8 parts of nanomaterials, and 200 parts of water.

[0032] The nanomaterials include nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1.5:0.8.

[0033] The preparation method of modified polyol ester is: (1) By weight, 35 parts of polyol, 60 parts of vegetable oil, solid super acid catalyst SO4 2- 5 parts of ZrO2 and 120 parts of ethanol are mixed evenly, and then heated to react to obtain polyol ester; (2) The obtained polyol ester is subjected to vacuum distillation to evaporate the ethanol, and then 35 parts of formic acid are added. After the temperature is raised to 80°C, 30 parts of hydrogen peroxide are added dropwise. After the addition is completed, the temperature is kept for 3 hours, and the layers are allowed to stand for separation. The water layer is removed, and the oil layer is distilled. The fraction at 210°C is collected to obtain a modified polyol ester.

[0034] The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.6:1:1.8.

[0035] The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.5:1:1.4.

[0036] The viscosity index improver is ethylene bisstearamide.

[0037] The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0038] The preservative is sodium diacetate.

[0039] The fungicide is thiophanate methyl.

[0040] Comparative Example 1 The difference between this comparative example and Example 1 is that the plant-based synthetic oil is different.

[0041] A method for preparing lubricating oil, comprising the following steps: (1) Weigh the following components in parts by weight: 130 parts of plant-based synthetic oil, 3 parts of viscosity index improver, 1 part of preservative, 7 parts of additive, 3 parts of flake graphite, 2 parts of fungicide, 3 parts of defoamer, 28 parts of modified polyol ester and 200 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 50 parts of oleic acid, 3 parts of linoleic acid, 15 parts of castor oil, 1 part of stearic acid and 1 part of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63°C, and then gradually added to the oil mixture and stirred for 15 minutes to obtain a plant-based synthetic oil; (4) The plant-based synthetic oil obtained above was heated to 43°C, and then corresponding weight portions of preservative, flake graphite, fungicide, defoamer and water were added, and stirred at a speed of 50 rps for 10 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40 rps for 20 minutes.

[0042] The preparation method of the auxiliary agent is: (1) First, calcining kaolin at 920 ° C for 50 min, taking it out and immersing it in silane coupling agent KH550, stirring it for 30 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 minutes.

[0043] The modified liquid is composed of the following substances in corresponding parts by weight: 12 parts of hexadecyltrimethylammonium bromide, 6 parts of sodium hexametaphosphate, 10 parts of nonylphenol polyoxyethylene ether, 5 parts of nanomaterials, and 190 parts of water.

[0044] The nanomaterials include nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1.2:0.5.

[0045] The preparation method of modified polyol ester is: (1) By weight, 32 parts of polyol, 40 parts of vegetable oil, solid super acid catalyst SO4 2- 3 parts of ZrO2 and 80 parts of ethanol are mixed evenly, and then heated to react to obtain polyol ester; (2) The obtained polyol ester was subjected to vacuum distillation to remove ethanol, and then 32 parts of formic acid was added. After the temperature was raised to 70°C, 23 parts of hydrogen peroxide was added dropwise. After the addition was completed, the temperature was kept for 2 hours, and the mixture was allowed to stand for stratification. The water layer was removed, and the oil layer was distilled. The fraction at 200°C was collected to obtain a modified polyol ester.

[0046] The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.4:1:1.5.

[0047] The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2:1:1.2.

[0048] The viscosity index improver is ethylene bisstearamide.

[0049] The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0050] The preservative is sodium diacetate.

[0051] The fungicide is thiophanate methyl.

[0052] Comparative Example 2 The difference between this comparative example and Example 1 is that the modifying liquid is different.

[0053] A method for preparing lubricating oil, comprising the following steps: (1) Weigh the following components in parts by weight: 130 parts of plant-based synthetic oil, 3 parts of viscosity index improver, 1 part of preservative, 7 parts of additive, 3 parts of flake graphite, 2 parts of fungicide, 3 parts of defoamer, 28 parts of modified polyol ester and 200 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 3 parts of oleic acid, 15 parts of linoleic acid, 50 parts of castor oil, 1 part of stearic acid and 1 part of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63°C, and then gradually added to the oil mixture and stirred for 15 minutes to obtain a plant-based synthetic oil; (4) The plant-based synthetic oil obtained above was heated to 43°C, and then corresponding weight portions of preservative, flake graphite, fungicide, defoamer and water were added, and stirred at a speed of 50 rps for 10 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40 rps for 20 minutes.

[0054] The preparation method of the auxiliary agent is: (1) First, calcining kaolin at 920 ° C for 50 min, taking it out and immersing it in silane coupling agent KH550, stirring it for 30 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 minutes.

[0055] The modified liquid is composed of the following substances in corresponding parts by weight: 12 parts of hexadecyltrimethylammonium bromide, 6 parts of sodium hexametaphosphate, 10 parts of nonylphenol polyoxyethylene ether, 5 parts of nano titanium dioxide, and 190 parts of water.

[0056] The preparation method of modified polyol ester is: (1) By weight, 32 parts of polyol, 40 parts of vegetable oil, solid super acid catalyst SO4 2- 3 parts of ZrO2 and 80 parts of ethanol are mixed evenly, and then heated to react to obtain polyol ester; (2) The obtained polyol ester was subjected to vacuum distillation to remove ethanol, and then 32 parts of formic acid was added. After the temperature was raised to 70°C, 23 parts of hydrogen peroxide was added dropwise. After the addition was completed, the temperature was kept for 2 hours, and the mixture was allowed to stand for stratification. The water layer was removed, and the oil layer was distilled. The fraction at 200°C was collected to obtain a modified polyol ester.

[0057] The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.4:1:1.5.

[0058] The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2:1:1.2.

[0059] The viscosity index improver is ethylene bisstearamide.

[0060] The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0061] The preservative is sodium diacetate.

[0062] The fungicide is thiophanate methyl.

[0063] Comparative Example 3 The difference between this comparative example and Example 1 is that the nanomaterials include nano-calcium carbonate, nano-silicon dioxide, and nano-titanium dioxide in a mass ratio of 1:1:1.

[0064] A method for preparing lubricating oil, comprising the following steps: (1) Weigh the following components in parts by weight: 130 parts of plant-based synthetic oil, 3 parts of viscosity index improver, 1 part of preservative, 7 parts of additive, 3 parts of flake graphite, 2 parts of fungicide, 3 parts of defoamer, 28 parts of modified polyol ester and 200 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 3 parts of oleic acid, 15 parts of linoleic acid, 50 parts of castor oil, 1 part of stearic acid and 1 part of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63°C, and then gradually added to the oil mixture and stirred for 15 minutes to obtain a plant-based synthetic oil; (4) The plant-based synthetic oil obtained above was heated to 43°C, and then corresponding weight portions of preservative, flake graphite, fungicide, defoamer and water were added, and stirred at a speed of 50 rps for 10 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40 rps for 20 minutes.

[0065] The preparation method of the auxiliary agent is: (1) First, calcining kaolin at 920 ° C for 50 min, taking it out and immersing it in silane coupling agent KH550, stirring it for 30 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 minutes.

[0066] The modified liquid is composed of the following substances in corresponding parts by weight: 12 parts of hexadecyltrimethylammonium bromide, 6 parts of sodium hexametaphosphate, 10 parts of nonylphenol polyoxyethylene ether, 5 parts of nanomaterials, and 190 parts of water.

[0067] The nanomaterials include nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1:1.

[0068] The preparation method of modified polyol ester is: (1) By weight, 32 parts of polyol, 40 parts of vegetable oil, solid super acid catalyst SO4 2- 3 parts of ZrO2 and 80 parts of ethanol are mixed evenly, and then heated to react to obtain polyol ester; (2) The obtained polyol ester was subjected to vacuum distillation to remove ethanol, and then 32 parts of formic acid was added. After the temperature was raised to 70°C, 23 parts of hydrogen peroxide was added dropwise. After the addition was completed, the temperature was kept for 2 hours, and the mixture was allowed to stand for stratification. The water layer was removed, and the oil layer was distilled. The fraction at 200°C was collected to obtain a modified polyol ester.

[0069] The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.4:1:1.5.

[0070] The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2:1:1.2.

[0071] The viscosity index improver is ethylene bisstearamide.

[0072] The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0073] The preservative is sodium diacetate.

[0074] The fungicide is thiophanate methyl.

[0075] Comparative Example 4 The difference between this comparative example and Example 1 is that the polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 1:1:1.

[0076] A method for preparing lubricating oil, comprising the following steps: (1) Weigh the following components in parts by weight: 130 parts of plant-based synthetic oil, 3 parts of viscosity index improver, 1 part of preservative, 7 parts of additive, 3 parts of flake graphite, 2 parts of fungicide, 3 parts of defoamer, 28 parts of modified polyol ester and 200 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 3 parts of oleic acid, 15 parts of linoleic acid, 50 parts of castor oil, 1 part of stearic acid and 1 part of dihydroxystearic acid; (2) mixing and stirring corresponding parts by weight of oleic acid, linoleic acid, and castor oil to obtain an oily mixture, and maintaining the stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63°C, and then gradually added to the oil mixture and stirred for 15 minutes to obtain a plant-based synthetic oil; (4) The plant-based synthetic oil obtained above was heated to 43°C, and then corresponding weight portions of preservative, flake graphite, fungicide, defoamer and water were added, and stirred at a speed of 50 rps for 10 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40 rps for 20 minutes.

[0077] The preparation method of the auxiliary agent is: (1) First, calcining kaolin at 920 ° C for 50 min, taking it out and immersing it in silane coupling agent KH550, stirring it for 30 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 minutes.

[0078] The modified liquid is composed of the following substances in corresponding parts by weight: 12 parts of hexadecyltrimethylammonium bromide, 6 parts of sodium hexametaphosphate, 10 parts of nonylphenol polyoxyethylene ether, 5 parts of nanomaterials, and 190 parts of water.

[0079] The nanomaterials include nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1.2:0.5.

[0080] The preparation method of modified polyol ester is: (1) By weight, 32 parts of polyol, 40 parts of vegetable oil, solid super acid catalyst SO4 2- 3 parts of ZrO2 and 80 parts of ethanol are mixed evenly, and then heated to react to obtain polyol ester; (2) The obtained polyol ester was subjected to vacuum distillation to remove ethanol, and then 32 parts of formic acid was added. After the temperature was raised to 70°C, 23 parts of hydrogen peroxide was added dropwise. After the addition was completed, the temperature was kept for 2 hours, and the mixture was allowed to stand for stratification. The water layer was removed, and the oil layer was distilled. The fraction at 200°C was collected to obtain a modified polyol ester.

[0081] The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 1:1:1.

[0082] The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2:1:1.2.

[0083] The viscosity index improver is ethylene bisstearamide.

[0084] The defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.

[0085] The preservative is sodium diacetate.

[0086] The fungicide is thiophanate methyl.

[0087] Performance Testing The friction coefficient is tested using a linear reciprocating friction and wear tester. The specifications and characteristics of the samples used during wear are exactly the same. During the experiment, the load is controlled to 250N and the linear speed is 1.4m / s. The friction coefficient is measured continuously for 5 hours. The wear amount is measured by weighing the sample after the friction coefficient is measured.

[0088] Table 1 Performance test results

[0089] The above performance test results show that the lubricating oils of Examples 1-2 have excellent overall performance, with Example 1 being the most outstanding. This is primarily due to the synergistic effect of multiple components. The comparative example, however, lacks the necessary technical solutions, resulting in significantly inferior performance to the examples in the corresponding performance tests. These experimental results further demonstrate the importance of the technical solutions defined in the present invention for its technical effectiveness.

[0090] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lubricating oil material, characterized in that: It includes the following raw materials in parts by weight: 130-150 parts of plant-based synthetic oil, 3-7 parts of viscosity index improver, 1-3 parts of preservative, 7-10 parts of additive, 3-5 parts of flake graphite, 2-5 parts of fungicide, 3-6 parts of defoamer, 28-35 parts of modified polyol ester and 200-210 parts of water.

2. The lubricating oil material according to claim 1, characterized in that The plant-based synthetic oil comprises the following components in parts by weight: 3-9 parts of oleic acid, 15-20 parts of linoleic acid, 50-60 parts of castor oil, 1-3 parts of stearic acid, and 1-3 parts of dihydroxystearic acid.

3. The lubricating oil material according to claim 1, characterized in that The preparation method of the auxiliary agent is as follows: (1) calcining kaolin at a temperature of 920-940° C. for 50-60 min, taking it out and immersing it in a silane coupling agent KH550, stirring it for 30-40 min, filtering it out, and rinsing it twice with deionized water to obtain pretreated kaolin; (2) Immerse the pretreated kaolin in the modified solution, treat it with ultrasound for 2 to 3 hours, filter it out, and then place it in a plasma radiation instrument for plasma irradiation treatment. Take it out after 15 to 20 minutes.

4. A method for preparing a lubricating oil material, characterized in that: The following steps are involved: (1) Weigh the following components in parts by weight: 130-150 parts of plant-based synthetic oil, 3-7 parts of viscosity index improver, 1-3 parts of preservative, 7-10 parts of additive, 3-5 parts of flake graphite, 2-5 parts of fungicide, 3-6 parts of defoamer, 28-35 parts of modified polyol ester and 200-210 parts of water; the plant-based synthetic oil includes the following components in parts by weight: 3-9 parts of oleic acid, 15-20 parts of linoleic acid, 50-60 parts of castor oil, 1-3 parts of stearic acid and 1-3 parts of dihydroxystearic acid; (2) mixing oleic acid, linoleic acid, and castor oil in corresponding parts by weight to obtain an oily mixture, and maintaining the mixture in a stirring state; (3) Stearic acid, dihydroxystearic acid, modified polyol ester, and additives in corresponding parts by weight are mixed and heated to 63-68°C, and then gradually added to the oil mixture and stirred for 15-20 minutes to obtain a plant-based synthetic oil; (4) After heating the plant-based synthetic oil obtained above to 43-48°C, add corresponding weight parts of preservative, flake graphite, fungicide, defoamer and water, and stir at a speed of 50-60 rps for 10-20 minutes; (5) Finally, add the corresponding weight portion of viscosity index improver and stir at a speed of 40-50 rps for 20-30 minutes.

5. The method for preparing a lubricating oil material according to claim 4, characterized in that: The modified liquid is composed of the following substances in corresponding parts by weight: 12-14 parts of hexadecyltrimethylammonium bromide, 6-9 parts of sodium hexametaphosphate, 10-14 parts of nonylphenol polyoxyethylene ether, 5-8 parts of nanomaterials, and 190-200 parts of water.

6. The method for preparing a lubricating oil material according to claim 4, characterized in that: The nanomaterials include nano calcium carbonate, nano silicon dioxide and nano titanium dioxide in a mass ratio of 1:1.2-1.5:0.5-0.

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7. The method for preparing a lubricating oil material according to claim 4, characterized in that: The preparation method of modified polyol ester is: (1) By weight, 32-35 parts of polyol, 40-60 parts of vegetable oil, solid super acid catalyst SO4 2- 3-5 parts of ZrO2 and 80-120 parts of ethanol are mixed evenly, and then heated to react to obtain a polyol ester; (2) The obtained polyol ester is subjected to vacuum distillation to evaporate the ethanol, and then 32-35 parts of formic acid are added. After the temperature is raised to 70-80°C, 23-30 parts of hydrogen peroxide are added dropwise. After the addition is completed, the temperature is kept for 2-3 hours, and the mixture is allowed to stand for stratification. The water layer is removed, and the oil layer is distilled. The fraction at 200-210°C is collected to obtain a modified polyol ester.

8. The method for preparing a lubricating oil material according to claim 7, characterized in that: The polyol is a mixture of glycerol, pentaerythritol and mannitol in a mass ratio of 0.4-0.6:1:1.5-1.

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9. The method for preparing a lubricating oil material according to claim 7, characterized in that: The vegetable oil is a mixture of castor oil, palm oil and soybean oil in a mass ratio of 0.2-0.5:1:1.2-1.4; The viscosity index improver is ethylene bisstearamide; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether; the preservative is sodium diacetate; and the bactericide is methyl thiophanate.

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