CN117384702B - Production process and application of diesel antiwear lubricant - Google Patents

Production process and application of diesel antiwear lubricant Download PDF

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CN117384702B
CN117384702B CN202311694272.1A CN202311694272A CN117384702B CN 117384702 B CN117384702 B CN 117384702B CN 202311694272 A CN202311694272 A CN 202311694272A CN 117384702 B CN117384702 B CN 117384702B
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temperature
rotation speed
wear
mass
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CN117384702A (en
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李兆军
付海明
黄仁耿
叶显孟
桂红峰
陈广福
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Guangdong Yueshou New Technology Co ltd
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    • C10MLUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
    • C10M169/00Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
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    • C10M2215/02Amines, e.g. polyalkylene polyamines; Quaternary amines
    • C10M2215/06Amines, e.g. polyalkylene polyamines; Quaternary amines having amino groups bound to carbon atoms of six-membered aromatic rings
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Abstract

The invention discloses a production process and application of a diesel antiwear lubricant, wherein the following raw materials in percentage by mass are weighed: 4-8% of modified additive, 2-3% of modified wear-resistant particles, 0.5-1% of alkyl diphenylamine, 1-1.5% of benzotriazole derivative and 0.1-0.3% of polyisobutylene succinimide, and the balance is base oil, and uniformly mixing the raw materials to prepare the diesel wear-resistant lubricant, wherein the main chain of the modified additive contains an organosilicon chain segment and boric acid elements, so that the modified additive has extreme pressure capability, two friction surfaces can be fully separated, the side chain contains catechol structures, the modified additive can be promoted to be adsorbed on the friction surfaces, a large number of hydroxyl groups can provide more active sites, a hydrogen bond network is further established, a stable lubricating film is formed, the modified wear-resistant particles can be embedded in gaps in the friction surfaces, secondary injury is prevented, and meanwhile, the modified wear-resistant particles can be uniformly dispersed in the lubricating film, and the lubricating effect is ensured.

Description

Production process and application of diesel antiwear lubricant
Technical Field
The invention relates to the technical field of preparation of diesel lubricants, in particular to a production process and application of a diesel antiwear lubricant.
Background
In diesel engines, diesel is both a fuel and a lubricant. Therefore, once diesel oil has problems or has low lubricity, for an oil delivery pump and a high-pressure oil pump, a certain lubricity is lacking, normal work is not performed, so that abrasion is greatly increased when the diesel oil runs, the service life of the oil pump is shortened, oil leakage of the oil pump is even caused when the diesel oil is serious, the mode of reducing friction and abrasion is mainly to add the lubricant, and the base oil is a basic component of the lubricating oil, has certain lubricating property and has the function of bearing additives in the lubricating process; the additive can be used for endowing the lubricating oil with excellent lubricating properties such as high bearing capacity, low friction coefficient, high abrasion resistance and the like, and the performance defect of the base oil is overcome and improved. Therefore, the selection of an appropriate lubricating oil is critical to improving oil-based lubrication properties.
Disclosure of Invention
The invention aims to provide a production process and application of a diesel antiwear lubricant, and solves the problem that the diesel lubricant has a common antiwear effect in the prior art.
The aim of the invention can be achieved by the following technical scheme:
the production process of the diesel antiwear lubricant specifically comprises the following steps:
weighing the following raw materials in percentage by mass: 4-8% of modified additive, 2-3% of modified wear-resistant particles, 0.5-1% of alkyl diphenylamine, 1-1.5% of benzotriazole derivative, 0.1-0.3% of polyisobutylene succinimide and the balance of base oil, and uniformly mixing the raw materials to prepare the diesel wear-resistant lubricant.
Further, the modified additive is prepared by the following steps:
step A1: uniformly mixing diethanolamine, vinyl dimethyl ethoxysilane, sodium hydroxide and N, N-dimethylformamide, stirring for 20-30min at the rotation speed of 150-200r/min and the temperature of 80-85 ℃ to obtain an intermediate 1, mixing the intermediate 1, boric acid, boron trichloride and toluene, and carrying out reflux reaction for 4-6h at the rotation speed of 150-200r/min and the temperature of 115-120 ℃ to obtain an intermediate 2;
step A2: mixing p-hydroxybenzaldehyde, pentaerythritol and isopropanol, stirring for 1-1.5h at the rotation speed of 150-200r/min and the temperature of 20-25 ℃, adding p-benzoic acid monohydrate, introducing nitrogen for protection, stirring for 14-16h, adding sodium bicarbonate, stirring for 30-40min to obtain an intermediate 3, uniformly mixing the intermediate 2, the intermediate 3, sodium carbonate and N, N-dimethylformamide, and reacting for 6-8h at the rotation speed of 120-150r/min and the temperature of 100-110 ℃ to obtain a modified monomer;
step A3: mixing a modified monomer, 3-glycidoxypropyl methyl diethoxysilane, N-dimethylformamide and deionized water, stirring for 10-15min at the rotation speed of 200-300r/min and the temperature of 60-70 ℃, adding concentrated sulfuric acid and hexamethyldisiloxane, reacting for 4-6h, regulating the pH value to be neutral, preparing modified polysiloxane, uniformly mixing the modified polysiloxane, dopamine and N, N-dimethylformamide, and reacting for 8-10h at the rotation speed of 150-200r/min and the temperature of 40-50 ℃ and the pH value of 11-12 to obtain the modified additive.
Further, the mol ratio of diethanolamine to vinyldimethylethoxysilane in the step A1 is 1:1, the amount of sodium hydroxide is 1% of the sum of the masses of diethanolamine and vinyldimethylethoxysilane, the mol ratio of intermediate 1 to boric acid is 1:1, and the amount of boron trichloride is 0.5% of the sum of the masses of intermediate 1 and boric acid.
Further, the molar ratio of the parahydroxybenzaldehyde to the pentaerythritol in the step A2 is 2:1, the dosage of the paratoluenesulfonic acid monohydrate is 2% of the sum of the masses of the parahydroxybenzaldehyde and the pentaerythritol, the molar ratio of the intermediate 2 to the intermediate 3 is 1:1, and the dosage of the sodium carbonate is 1.5% of the sum of the masses of the intermediate 2 and the intermediate 3.
Further, the dosage ratio of the modified monomer, 3-glycidoxypropyl methyl diethoxysilane, deionized water and hexamethyldisiloxane in the step A3 is 1mmol:2mmol:20mL:1.5mmol, the dosage of the concentrated sulfuric acid is 1% of the sum of the modified monomer, 3-glycidoxypropyl methyl diethoxysilane and hexamethyldisiloxane, and the molar ratio of epoxy groups to dopamine on the modified polysiloxane is 1:1.
Further, the modified wear-resistant particles are prepared by the following steps:
step B1: dispersing graphene in ethanol, adding gamma-glycidol ether oxypropyl trimethoxy silane and deionized water, mixing, stirring for 2-3 hours at the rotation speed of 150-200r/min and the temperature of 40-50 ℃, filtering to remove filtrate, dispersing a substrate in toluene, adding aminobenzaldehyde, and reacting for 3-5 hours at the rotation speed of 120-150r/min and the pH value of 11-12 to obtain modified graphene;
step B2: uniformly mixing modified graphene, o-phenylenediamine, potassium carbonate and N, N-dimethylformamide, reacting for 10-15 hours at the rotating speed of 150-200r/min and the temperature of 80-85 ℃, filtering to remove filtrate, dispersing a substrate into ethanol, adding zinc hydroxide and ammonia water, and reacting for 4-6 hours at the rotating speed of 200-300r/min and the temperature of 20-25 ℃ to obtain the modified wear-resistant particles.
Further, the dosage of the gamma-glycidyl ether oxypropyl trimethoxysilane in the step B1 is 3% of the mass of graphene, and the mass ratio of the substrate to the aminobenzaldehyde is 0.3:5.
Further, the mass ratio of the modified graphene to the o-phenylenediamine to the potassium carbonate in the step B2 is 2:0.65:1.5, and the dosage ratio of the substrate to the ethanol to the zinc hydroxide to the ammonia water is 1g:30g:0.2g:30mL.
The invention has the beneficial effects that: the invention provides a diesel antiwear lubricant, which comprises raw materials of modified additive, modified wear-resistant particles, alkyl diphenylamine, benzotriazole derivative, polyisobutylene succinimide and base oil, wherein the modified additive takes diethanolamine and vinyldimethyl ethoxysilane as raw materials, so that secondary amine on diethanolamine and double bond on vinyldimethyl ethoxysilane are grafted to prepare intermediate 2, intermediate 1 is reacted with boric acid, so that two alcohol hydroxyl groups on intermediate 1 react with two B-OH groups on boric acid to form boric acid ester, the p-hydroxybenzaldehyde and pentaerythritol are subjected to diacetal reaction to prepare intermediate 3, intermediate 2 reacts with intermediate 3, so that residual B-OH on intermediate 2 reacts with phenolic hydroxyl groups on intermediate 3 to prepare modified monomers, the modified monomers react with 3-glycidylether oxypropyl methyl diethoxysilane to prepare modified polysiloxane, the modified polysiloxane reacts with dopamine under alkaline condition, so that epoxy groups on the modified polysiloxane react with amino groups on dopamine to prepare main chain additive, the modified polysiloxane has better hydroxyl groups on the surface of the modified polysiloxane, the modified polysiloxane has the hydroxyl groups on the surface of the modified epoxy groups, the modified epoxy groups can be more fully reacted with the surface of the epoxy groups, and the surface of the modified epoxy groups can be more fully modified by the modified epoxy groups, and the surface has the modified epoxy groups can be more fully absorbed by the surface of the epoxy groups on the surface of the modified epoxy resin can be more has, and the surface has better friction effect can be better formed on the surface can be better than the surface modified by the modified surface has the modified epoxy modified particles, the epoxy group and the amino group react to prepare modified graphene, the modified graphene and the o-phenylenediamine react, the aldehyde group on the modified graphene and the diamine on the o-phenylenediamine react to form imidazole, and then the imidazole and zinc ions coordinate to form an organic framework, and the modified wear-resistant particles can be embedded in gaps in a friction surface to prevent secondary injury and can be uniformly dispersed in a lubricating film, so that the lubricating effect is ensured.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The production process of the diesel antiwear lubricant specifically comprises the following steps:
weighing the following raw materials in percentage by mass: 4% of modified additive, 2% of modified wear-resistant particles, 0.5% of alkyl diphenylamine, 1% of benzotriazole derivative and 0.1% of polyisobutylene succinimide, and the balance of base oil, and uniformly mixing the raw materials to prepare the diesel wear-resistant lubricant.
The model of the alkyl phenylenediamine is T557, the model of the benzotriazole derivative is T551, the model of the polyisobutene succinimide is T155, and the base oil is No. 68 total loss system oil.
The modified additive is prepared by the following steps:
step A1: uniformly mixing diethanolamine, vinyldimethylethoxysilane, sodium hydroxide and N, N-dimethylformamide, stirring for 20min at the rotation speed of 150r/min and the temperature of 80 ℃ to obtain an intermediate 1, mixing the intermediate 1, boric acid, boron trichloride and toluene, and carrying out reflux reaction for 4h at the rotation speed of 150r/min and the temperature of 115 ℃ to obtain an intermediate 2;
step A2: mixing p-hydroxybenzaldehyde, pentaerythritol and isopropanol, stirring for 1h at the rotation speed of 150r/min and the temperature of 20 ℃, adding p-benzoic acid monohydrate, introducing nitrogen for protection, stirring for 14h, adding sodium bicarbonate, stirring for 30min to obtain an intermediate 3, uniformly mixing the intermediate 2, the intermediate 3, sodium carbonate and N, N-dimethylformamide, and reacting for 6h at the rotation speed of 120r/min and the temperature of 100 ℃ to obtain a modified monomer;
step A3: mixing a modified monomer, 3-glycidoxypropyl methyl diethoxysilane, N-dimethylformamide and deionized water, stirring for 10min at the temperature of 60 ℃ at the speed of 200r/min, adding concentrated sulfuric acid and hexamethyldisiloxane, reacting for 4h, regulating pH to be neutral to obtain modified polysiloxane, uniformly mixing the modified polysiloxane, dopamine and N, N-dimethylformamide, and reacting for 8h at the temperature of 40 ℃ at the speed of 150r/min at the pH value of 11 to obtain the modified additive.
The mol ratio of the diethanolamine to the vinyldimethylethoxysilane in the step A1 is 1:1, the sodium hydroxide is 1% of the sum of the masses of the diethanolamine and the vinyldimethylethoxysilane, the mol ratio of the intermediate 1 to the boric acid is 1:1, and the boron trichloride is 0.5% of the sum of the masses of the intermediate 1 and the boric acid.
The molar ratio of the parahydroxybenzaldehyde to the pentaerythritol in the step A2 is 2:1, the dosage of the paratoluenesulfonic acid monohydrate is 2 percent of the sum of the masses of the parahydroxybenzaldehyde and the pentaerythritol, the molar ratio of the intermediate 2 to the intermediate 3 is 1:1, and the dosage of the sodium carbonate is 1.5 percent of the sum of the masses of the intermediate 2 and the intermediate 3.
The dosage ratio of the modified monomer to the 3-glycidoxypropyl methyl diethoxy silane to the deionized water to the hexamethyldisiloxane in the step A3 is 1mmol to 2mmol to 20mL to 1.5mmol, the dosage of the concentrated sulfuric acid is 1% of the sum of the mass of the modified monomer, the mass of the 3-glycidoxypropyl methyl diethoxy silane and the mass of the hexamethyldisiloxane, and the molar ratio of the epoxy group to the dopamine on the modified polysiloxane is 1:1.
The modified wear-resistant particles are prepared by the following steps:
step B1: dispersing graphene in ethanol, adding gamma-glycidol ether oxypropyl trimethoxy silane and deionized water, mixing, stirring for 2 hours at the rotation speed of 150r/min and the temperature of 40 ℃, filtering to remove filtrate, dispersing a substrate in toluene, adding aminobenzaldehyde, and reacting for 3 hours at the rotation speed of 120r/min and the pH value of 11 to obtain modified graphene;
step B2: uniformly mixing modified graphene, o-phenylenediamine, potassium carbonate and N, N-dimethylformamide, reacting for 10 hours at the temperature of 80 ℃ at the rotating speed of 150r/min, filtering to remove filtrate, dispersing a substrate into ethanol, adding zinc hydroxide and ammonia water, and reacting for 4 hours at the temperature of 20 ℃ at the rotating speed of 200r/min to obtain the modified wear-resistant particles.
The dosage of the gamma-glycidyl ether oxypropyl trimethoxysilane in the step B1 is 3% of the mass of graphene, and the mass ratio of the substrate to the aminobenzaldehyde is 0.3:5.
The mass ratio of the modified graphene to the o-phenylenediamine to the potassium carbonate in the step B2 is 2:0.65:1.5, and the dosage ratio of the substrate to the ethanol to the zinc hydroxide to the ammonia water is 1g:30g:0.2g:30mL.
Example 2
The production process of the diesel antiwear lubricant specifically comprises the following steps:
weighing the following raw materials in percentage by mass: 6% of modified additive, 2.5% of modified wear-resistant particles, 0.8% of alkyl diphenylamine, 1.3% of benzotriazole derivative and 0.2% of polyisobutylene succinimide, and the balance of base oil, and uniformly mixing the raw materials to prepare the diesel wear-resistant lubricant.
The model of the alkyl phenylenediamine is T557, the model of the benzotriazole derivative is NS-T42, the model of the polyisobutene succinimide is T155, and the base oil is No. 68 total loss system oil.
The modified additive is prepared by the following steps:
step A1: uniformly mixing diethanolamine, vinyldimethylethoxysilane, sodium hydroxide and N, N-dimethylformamide, stirring for 25min at the rotation speed of 200r/min and the temperature of 83 ℃ to obtain an intermediate 1, mixing the intermediate 1, boric acid, boron trichloride and toluene, and carrying out reflux reaction for 5h at the rotation speed of 150r/min and the temperature of 118 ℃ to obtain an intermediate 2;
step A2: mixing p-hydroxybenzaldehyde, pentaerythritol and isopropanol, stirring for 1.3 hours at the rotation speed of 200r/min and the temperature of 20 ℃, adding p-benzoic acid monohydrate, introducing nitrogen for protection, stirring for 15 hours, adding sodium bicarbonate, stirring for 35 minutes to obtain an intermediate 3, uniformly mixing the intermediate 2, the intermediate 3, sodium carbonate and N, N-dimethylformamide, and reacting for 7 hours at the rotation speed of 120r/min and the temperature of 105 ℃ to obtain a modified monomer;
step A3: mixing a modified monomer, 3-glycidoxypropyl methyl diethoxysilane, N-dimethylformamide and deionized water, stirring for 13min at the temperature of 65 ℃ at the speed of 200r/min, adding concentrated sulfuric acid and hexamethyldisiloxane, reacting for 5h, regulating pH to be neutral to obtain modified polysiloxane, uniformly mixing the modified polysiloxane, dopamine and N, N-dimethylformamide, and reacting for 9h at the temperature of 45 ℃ at the speed of 150r/min at the pH value of 12 to obtain the modified additive.
The mol ratio of the diethanolamine to the vinyldimethylethoxysilane in the step A1 is 1:1, the sodium hydroxide is 1% of the sum of the masses of the diethanolamine and the vinyldimethylethoxysilane, the mol ratio of the intermediate 1 to the boric acid is 1:1, and the boron trichloride is 0.5% of the sum of the masses of the intermediate 1 and the boric acid.
The molar ratio of the parahydroxybenzaldehyde to the pentaerythritol in the step A2 is 2:1, the dosage of the paratoluenesulfonic acid monohydrate is 2 percent of the sum of the masses of the parahydroxybenzaldehyde and the pentaerythritol, the molar ratio of the intermediate 2 to the intermediate 3 is 1:1, and the dosage of the sodium carbonate is 1.5 percent of the sum of the masses of the intermediate 2 and the intermediate 3.
The dosage ratio of the modified monomer to the 3-glycidoxypropyl methyl diethoxy silane to the deionized water to the hexamethyldisiloxane in the step A3 is 1mmol to 2mmol to 20mL to 1.5mmol, the dosage of the concentrated sulfuric acid is 1% of the sum of the mass of the modified monomer, the mass of the 3-glycidoxypropyl methyl diethoxy silane and the mass of the hexamethyldisiloxane, and the molar ratio of the epoxy group to the dopamine on the modified polysiloxane is 1:1.
The modified wear-resistant particles are prepared by the following steps:
step B1: dispersing graphene in ethanol, adding gamma-glycidol ether oxypropyl trimethoxy silane and deionized water, mixing, stirring for 2 hours at the rotation speed of 150r/min and the temperature of 45 ℃, filtering to remove filtrate, dispersing a substrate in toluene, adding aminobenzaldehyde, and reacting for 4 hours at the rotation speed of 120r/min and the pH value of 12 to obtain modified graphene;
step B2: uniformly mixing modified graphene, o-phenylenediamine, potassium carbonate and N, N-dimethylformamide, reacting for 13 hours at the speed of 150r/min and the temperature of 85 ℃, filtering to remove filtrate, dispersing a substrate into ethanol, adding zinc hydroxide and ammonia water, and reacting for 5 hours at the speed of 200r/min and the temperature of 25 ℃ to obtain the modified wear-resistant particles.
The dosage of the gamma-glycidyl ether oxypropyl trimethoxysilane in the step B1 is 3% of the mass of graphene, and the mass ratio of the substrate to the aminobenzaldehyde is 0.3:5.
The mass ratio of the modified graphene to the o-phenylenediamine to the potassium carbonate in the step B2 is 2:0.65:1.5, and the dosage ratio of the substrate to the ethanol to the zinc hydroxide to the ammonia water is 1g:30g:0.2g:30mL.
Example 3
The production process of the diesel antiwear lubricant specifically comprises the following steps:
weighing the following raw materials in percentage by mass: 8% of modified additive, 3% of modified wear-resistant particles, 1% of alkyl diphenylamine, 1.5% of benzotriazole derivative and 0.3% of polyisobutylene succinimide, and the balance of base oil, and uniformly mixing the raw materials to prepare the diesel wear-resistant lubricant.
The model of the alkyl phenylenediamine is T534, the model of the benzotriazole derivative is NS-T42, the model of the polyisobutene succinimide is T156, and the base oil is No. 68 total loss system oil.
The modified additive is prepared by the following steps:
step A1: uniformly mixing diethanolamine, vinyldimethylethoxysilane, sodium hydroxide and N, N-dimethylformamide, stirring for 30min at the speed of 200r/min and the temperature of 85 ℃ to obtain an intermediate 1, mixing the intermediate 1, boric acid, boron trichloride and toluene, and carrying out reflux reaction for 6h at the speed of 200r/min and the temperature of 120 ℃ to obtain an intermediate 2;
step A2: mixing p-hydroxybenzaldehyde, pentaerythritol and isopropanol, stirring for 1.5 hours at the rotation speed of 200r/min and the temperature of 25 ℃, adding p-benzoic acid monohydrate, introducing nitrogen for protection, stirring for 16 hours, adding sodium bicarbonate, stirring for 40 minutes to obtain an intermediate 3, uniformly mixing the intermediate 2, the intermediate 3, sodium carbonate and N, N-dimethylformamide, and reacting for 8 hours at the rotation speed of 150r/min and the temperature of 110 ℃ to obtain a modified monomer;
step A3: mixing a modified monomer, 3-glycidoxypropyl methyl diethoxysilane, N-dimethylformamide and deionized water, stirring for 15min at the temperature of 70 ℃ at the rotating speed of 300r/min, adding concentrated sulfuric acid and hexamethyldisiloxane, reacting for 6h, regulating pH to be neutral to obtain modified polysiloxane, uniformly mixing the modified polysiloxane, dopamine and N, N-dimethylformamide, and reacting for 10h at the temperature of 50 ℃ at the rotating speed of 200r/min at the pH value of 12 to obtain the modified additive.
The mol ratio of the diethanolamine to the vinyldimethylethoxysilane in the step A1 is 1:1, the sodium hydroxide is 1% of the sum of the masses of the diethanolamine and the vinyldimethylethoxysilane, the mol ratio of the intermediate 1 to the boric acid is 1:1, and the boron trichloride is 0.5% of the sum of the masses of the intermediate 1 and the boric acid.
The molar ratio of the parahydroxybenzaldehyde to the pentaerythritol in the step A2 is 2:1, the dosage of the paratoluenesulfonic acid monohydrate is 2 percent of the sum of the masses of the parahydroxybenzaldehyde and the pentaerythritol, the molar ratio of the intermediate 2 to the intermediate 3 is 1:1, and the dosage of the sodium carbonate is 1.5 percent of the sum of the masses of the intermediate 2 and the intermediate 3.
The dosage ratio of the modified monomer to the 3-glycidoxypropyl methyl diethoxy silane to the deionized water to the hexamethyldisiloxane in the step A3 is 1mmol to 2mmol to 20mL to 1.5mmol, the dosage of the concentrated sulfuric acid is 1% of the sum of the mass of the modified monomer, the mass of the 3-glycidoxypropyl methyl diethoxy silane and the mass of the hexamethyldisiloxane, and the molar ratio of the epoxy group to the dopamine on the modified polysiloxane is 1:1.
The modified wear-resistant particles are prepared by the following steps:
step B1: dispersing graphene in ethanol, adding gamma-glycidol ether oxypropyl trimethoxy silane and deionized water, mixing, stirring for 3 hours at the speed of 200r/min and the temperature of 50 ℃, filtering to remove filtrate, dispersing a substrate in toluene, adding aminobenzaldehyde, and reacting for 5 hours at the speed of 150r/min and the pH value of 12 to obtain modified graphene;
step B2: uniformly mixing modified graphene, o-phenylenediamine, potassium carbonate and N, N-dimethylformamide, reacting for 15 hours at the temperature of 85 ℃ at the rotating speed of 200r/min, filtering to remove filtrate, dispersing a substrate into ethanol, adding zinc hydroxide and ammonia water, and reacting for 6 hours at the temperature of 25 ℃ at the rotating speed of 300r/min to obtain modified wear-resistant particles.
The dosage of the gamma-glycidyl ether oxypropyl trimethoxysilane in the step B1 is 3% of the mass of graphene, and the mass ratio of the substrate to the aminobenzaldehyde is 0.3:5.
The mass ratio of the modified graphene to the o-phenylenediamine to the potassium carbonate in the step B2 is 2:0.65:1.5, and the dosage ratio of the substrate to the ethanol to the zinc hydroxide to the ammonia water is 1g:30g:0.2g:30mL.
Comparative example 1
This comparative example was identical to example 1 except that no modifying monomer was added.
Comparative example 2
This comparative example uses modified polysiloxane instead of modified additive as compared to example 1, and the rest of the procedure is the same.
Comparative example 3
This comparative example uses graphene instead of modified wear resistant particles as compared to example 1, the rest of the steps being the same.
The lubricants prepared in examples 1 to 3 and comparative examples 1 to 3 were subjected to experiments for 1200 seconds under a load of 500N and a rotation speed of 1200r/min by using an experimental steel ball having a diameter of 12.7mm and a hardness of 65 according to the GB/T3142-2019 standard, and the friction coefficient and the plaque diameter were calculated, and the experimental results are shown in the following table.
The table shows that the wear-resistant paint has good wear-resistant effect.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.

Claims (2)

1. A production process of a diesel antiwear lubricant is characterized by comprising the following steps of: the method specifically comprises the following steps:
weighing the following raw materials in percentage by mass: 4-8% of modified additive, 2-3% of modified wear-resistant particles, 0.5-1% of alkyl diphenylamine, 1-1.5% of benzotriazole derivative and 0.1-0.3% of polyisobutylene succinimide, and the balance of base oil, and uniformly mixing the raw materials to prepare the diesel wear-resistant lubricant;
step A1: uniformly mixing diethanolamine, vinyl dimethyl ethoxysilane, sodium hydroxide and N, N-dimethylformamide, stirring for 20-30min at the rotation speed of 150-200r/min and the temperature of 80-85 ℃ to obtain an intermediate 1, mixing the intermediate 1, boric acid, boron trichloride and toluene, and carrying out reflux reaction for 4-6h at the rotation speed of 150-200r/min and the temperature of 115-120 ℃ to obtain an intermediate 2;
step A2: mixing p-hydroxybenzaldehyde, pentaerythritol and isopropanol, stirring for 1-1.5h at the rotation speed of 150-200r/min and the temperature of 20-25 ℃, adding p-toluenesulfonic acid monohydrate, introducing nitrogen for protection, stirring for 14-16h, adding sodium bicarbonate, stirring for 30-40min to obtain an intermediate 3, uniformly mixing the intermediate 2, the intermediate 3, sodium carbonate and N, N-dimethylformamide, and reacting for 6-8h at the rotation speed of 120-150r/min and the temperature of 100-110 ℃ to obtain a modified monomer;
step A3: mixing a modified monomer, 3-glycidoxypropyl methyl diethoxysilane, N-dimethylformamide and deionized water, stirring for 10-15min at the rotation speed of 200-300r/min and the temperature of 60-70 ℃, adding concentrated sulfuric acid and hexamethyldisiloxane, reacting for 4-6h, regulating the pH value to be neutral to obtain modified polysiloxane, uniformly mixing the modified polysiloxane, dopamine and N, N-dimethylformamide, and reacting for 8-10h at the rotation speed of 150-200r/min and the temperature of 40-50 ℃ and the pH value of 11-12 to obtain a modified additive;
the mol ratio of the diethanolamine to the vinyl dimethyl ethoxysilane in the step A1 is 1:1, the sodium hydroxide is 1% of the sum of the masses of the diethanolamine and the vinyl dimethyl ethoxysilane, the mol ratio of the intermediate 1 to the boric acid is 1:1, and the boron trichloride is 0.5% of the sum of the masses of the intermediate 1 and the boric acid;
the mol ratio of the parahydroxybenzaldehyde to the pentaerythritol in the step A2 is 2:1, the dosage of the paratoluenesulfonic acid monohydrate is 2 percent of the sum of the masses of the parahydroxybenzaldehyde and the pentaerythritol, the mol ratio of the intermediate 2 to the intermediate 3 is 1:1, and the dosage of the sodium carbonate is 1.5 percent of the sum of the masses of the intermediate 2 and the intermediate 3;
the dosage ratio of the modified monomer to the 3-glycidoxypropyl methyl diethoxysilane to the deionized water to the hexamethyldisiloxane in the step A3 is 1mmol to 2mmol to 20mL to 1.5mmol, the dosage of the concentrated sulfuric acid is 1 percent of the sum of the mass of the modified monomer, the mass of the 3-glycidoxypropyl methyl diethoxysilane and the mass of the hexamethyldisiloxane, and the molar ratio of the epoxy group to the dopamine on the modified polysiloxane is 1:1;
the modified wear-resistant particles are prepared by the following steps:
step B1: dispersing graphene in ethanol, adding gamma-glycidol ether oxypropyl trimethoxy silane and deionized water, mixing, stirring for 2-3 hours at the rotation speed of 150-200r/min and the temperature of 40-50 ℃, filtering to remove filtrate, dispersing a substrate in toluene, adding aminobenzaldehyde, and reacting for 3-5 hours at the rotation speed of 120-150r/min and the pH value of 11-12 to obtain modified graphene;
step B2: uniformly mixing modified graphene, o-phenylenediamine, potassium carbonate and N, N-dimethylformamide, reacting for 10-15 hours at the rotating speed of 150-200r/min and the temperature of 80-85 ℃, filtering to remove filtrate, dispersing a substrate into ethanol, adding zinc hydroxide and ammonia water, and reacting for 4-6 hours at the rotating speed of 200-300r/min and the temperature of 20-25 ℃ to obtain modified wear-resistant particles;
the dosage of the gamma-glycidyl ether oxypropyl trimethoxysilane in the step B1 is 3% of the mass of graphene, and the mass ratio of the substrate to the aminobenzaldehyde is 0.3:5;
the mass ratio of the modified graphene to the o-phenylenediamine to the potassium carbonate in the step B2 is 2:0.65:1.5, and the dosage ratio of the substrate to the ethanol to the zinc hydroxide to the ammonia water is 1g:30g:0.2g:30mL.
2. Use of a diesel antiwear lubricant produced by the production process of claim 1 in a diesel additive.
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