58 results about "Polyisobutylene succinimide" patented technology

The invention discloses high-performance anti-wear engine lubricating oil as well as a preparation method and application thereof. The high-performance anti-wear engine lubricating oil is prepared from the following raw materials: self-developed lubricating oil base oil, poly-alpha-olefin, zinc dialkyl dithiophosphate, calcium sulfonate, polyisobutylene succinimide, an antioxidant, polymethacrylate, an organic molybdenum complex, a de-foaming agent and a pour point depressant. The preparation method comprises the following steps: 1) synthesizing 9, 10-bis (2-tert-butyl-4-methylphenoxy) trimethylolethane stearate as base oil of the lubricating oil; and 2) mixing the base oil with other assistants to obtain the high-performance anti-wear engine lubricating oil. According to the preparation method, novel-like synthetic ester oil is firstly prepared, a phenol group and a large steric hindrance substituent group are introduced into a polymer, the anti-oxidation function is directly built in base oil molecules, meanwhile, super-strong heat resistance is achieved, and finally the high-performance anti-wear engine lubricating oil is obtained and can be applied to high-end application scenes such as aero-engines or gas turbines.

The invention discloses a hydrogenation device scale inhibitor for heavy high-sulfur raw oil and a preparation method of the hydrogenation device scale inhibitor, and relates to the technical field of scale inhibitors. The scale inhibitor is prepared from a polyisobutylene succinimide dispersing agent, a high-temperature-resistant scale inhibition dispersing agent, an anti-rust agent, an imidazoline corrosion inhibitor, an antioxidant, a sulfide chelating agent, a clearing agent, cup carbazole alkylbenzene sulfonate and a solvent in specific parts by weight. The preparation method comprises the following steps: heating the solvent to 80-100 DEG C, sequentially adding the other components, and stirring for 30-40 minutes. Aiming at the characteristics of heavy high-sulfur raw oil, the scale inhibitor realizes high scale inhibition rate, excellent high-temperature stability and strong sulfur corrosion resistance through a multi-component synergistic effect, effectively solves the problems of scaling and corrosion of a hydrogenation device, prolongs the operation cycle of the device, and is suitable for a hydrogenation process of high-sulfur and high-asphaltene raw oil.

The application belongs to the technical field of lubricating oil additives, and particularly relates to a polyisobutylene succinimide dispersant as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polyisobutylene maleic anhydride, base oil and aromatic hydrocarbon solvent, then adding aminobenzene boronic acid, and performing reaction by increasing temperature to reflux temperature, and obtaining the polyisobutylene succinimide dispersant after filtration. The polyisobutylene succinimide dispersant is prepared by using polyisobutylene maleic anhydride and aminobenzene boronic acid, the molecular structure of the polyisobutylene succinimide dispersant contains not only an aromatic ring but also an oxygen-containing benzene boronic acid group, the aromatic ring and the benzene boronic acid group both have a good adsorption effect on soot particles, and the ability of the polyisobutylene succinimide dispersant to disperse soot is improved. The performance test results show that the oil product prepared by using the polyisobutylene succinimide dispersant of the application not only improves the soot dispersion performance of the oil product, but also improves the high-temperature detergency of the oil product, and the preparation process is simple and easy to implement.

The application provides a hybrid vehicle engine lubricating oil composition and a preparation method thereof.The hybrid vehicle engine lubricating oil composition comprises the following components: (A) a benzotriazole derivative; (B) a composite antioxidant comprising an alkylated diphenylamine antioxidant and a sulfide phenolic antioxidant; (C) a polyisobutylene succinimide ashless dispersant; (D) a sulfonate and / or a sulfated alkyl phenate; (E) a zinc dialkyldithiophosphate; (F) a composite friction modifier comprising an oil-soluble organic molybdenum friction modifier and an ashless friction modifier; (G) a phosphite type extreme pressure antiwear agent; and (H) a major amount of a lubricating oil base oil; wherein the structure of the benzotriazole derivative is shown in formula (I): wherein the definitions of the groups are shown in the specification.The hybrid vehicle engine lubricating oil composition has excellent antioxidant performance, corrosion resistance and rust resistance, and good emulsion retention performance and wear resistance.

This invention belongs to the field of coolant technology, specifically relating to a coolant and its application in an immersion liquid-cooled energy storage system. The coolant, by weight, comprises 80-95 parts base oil, 1-5 parts thermally conductive nanoparticles, 0.5-2 parts composite dispersant, 0.3-1 part composite corrosion inhibitor, 0.1-0.5 parts antioxidant, 0.2-0.5 parts pour point depressant, and 0.01-0.05 parts defoamer. The base oil is a mixture of polyalphaolefin and synthetic ester, and the composite dispersant is a compound of polyisobutylene succinimide and Mannich base dispersant. Aging tests show that this coolant exhibits high thermal conductivity retention, low acid value increase, and low corrosion rate. The coolant of this invention can effectively maintain the dispersion stability of nanoparticles in the environment of precipitates from sealing materials, extending the fluid change cycle.

This invention proposes a lubricating oil composition for a four-stroke engine specifically designed for unmanned aerial vehicles (UAVs) and its preparation method. The lubricating oil composition for a four-stroke engine of this invention comprises the following components: (A) a nitrogen-containing organoboron compound; (B) an alkyl diphenylamine; (C) polyisobutylene succinimide; (D) sulfonates and / or sulfurized alkylphenol salts; (E) zinc dialkyl dithiophosphate; (F) dialkyl dithiocarbamate; (G) polymethyl methacrylate; and (H) a base oil in a major amount. The structure of the nitrogen-containing organoboron compound is shown in formula (I) and / or formula (II), with the definitions of each group provided in the specification. The lubricating oil composition for a four-stroke UAV engine of this invention exhibits excellent extreme pressure anti-wear, anti-oxidation, and detergency properties, effectively suppressing the increased wear caused by the high power-to-weight ratio and harsh lubrication conditions of four-stroke UAV engines.

The invention discloses an extreme pressure anti-wear gear oil composite additive and a processing method thereof, and relates to the technical field of gear oil composite additives, and the extreme pressure anti-wear gear oil composite additive comprises the following components: 15-25% of sulfurized isobutylene, 10-20% of zinc dialkyl dithiophosphate, 8-15% of polyisobutylene succinimide, 5-12% of mahogany petroleum sulfonate, 5-12% of 2, 3, 5-trimethyl-1, 3-pentanediol monoisobutyrate, 5-12% of 2, 3, 5-trimethyl-1, 3- According to the invention, through scientific compounding of core functional components, synergistic interaction of extreme pressure and anti-wear performance is realized, the defect that performance of a single additive is poor is effectively overcome, the anti-wear performance of the lubricating oil is greatly improved, the service life of the lubricating oil is prolonged, and the service life of the lubricating oil is prolonged. The product can be precisely adapted to different application scenes such as heavy-load engineering machinery, high-speed precise gear transmission systems and mining machinery, can form a stable lubricating protective film under harsh working conditions, resists the failure problems such as abrasion, scratch and sintering of a gear contact surface, is high in adaptability, does not need to additionally adjust a formula according to the working conditions, and is low in cost. The lubricating protection requirements of various gear transmission devices can be met, and the application range is wide.

The application relates to the technical field of light-adjusting films, and particularly discloses a low-voltage-driven intelligent dynamic light-adjusting film and a preparation method thereof. The low-voltage-driven intelligent dynamic light-adjusting film comprises a transparent substrate, a transparent electrode and an electrophoretic medium layer, the transparent electrode is plated on one side of the transparent substrate, the transparent electrode is bonded with the electrophoretic medium layer through an adhesive, and the components of the electrophoretic medium layer include electrophoretic particle microcapsules and a binder. The electrophoretic particle microcapsules are used for storing an internal phase, the components of the internal phase include electrophoretic particles, a charge control agent, a stabilizer and a dispersed mobile phase, and the components of the stabilizer include polyisobutylene succinimide. The polyisobutylene succinimide is used for increasing the steric hindrance of the inner surface of the capsule wall, hindering the agglomeration of the electrophoretic particles on the inner surface of the capsule wall, and increasing the light transmittance adjustment range of the light-adjusting film under low-voltage driving.

The invention discloses a cooling liquid, which is prepared from the following ingredients in percentage by mass: 89 to 98 percent of low-viscosity poly-alpha olefin, 1 to 8 percent of high-viscosity poly-alpha olefin, 0.01 to 0.5 percent of modified nanometer insulating heat-conducting fluid, 0.2 to 2.5 percent of alkyl naphthalene, 0.01 to 0.5 percent of antioxidants and 0.03 to 0.06 percent of anti-foaming agents. The preparation method of the modified nano insulating heat-conducting fluid comprises the following steps: S1, uniformly stirring the polyisobutylene succinimide dispersing agent, the sulfurized alkylphenate and the antioxidant to obtain a mixture; and S2, adding nano solid particles into the mixture, and carrying out ultrasonic dispersion. According to the cooling liquid and the preparation method and application thereof, the modified nano insulating heat-conducting fluid, the antioxidant, the anti-foaming agent and the like are added into the poly-alpha-olefin, so that the immersed cooling liquid which is good in stability and capable of prolonging the service life and improving the heat transfer and heat conduction performance is formed.

This invention relates to the field of lubricant technology, specifically to a lubricant for agricultural machinery and its preparation method. This agricultural machinery lubricant, by weight, comprises the following components: 85-93 parts of a first base oil, 2.0-3.0 parts of 1,3-bis(3-phenoxyphenoxy)benzene, 0.2-0.3 parts of zinc dialkyl dithiophosphate, 0.5-1.0 parts of a graphene-based anti-wear additive, 2.0-4.0 parts of polyisobutylene succinimide, 0.5-1.5 parts of a hindered phenolic antioxidant, 1.5-3.0 parts of hydrogenated styrene-isoprene copolymer, and 0.2-0.6 parts of polymethacrylate; wherein the first base oil comprises poly(α-olefin) PAO4 and paraffin oil in a weight ratio of 2-3:1. The agricultural machinery lubricant provided by this invention improves the anti-wear and friction-reducing properties of the graphene-based anti-wear additive, and enhances the stable dispersibility of functionalized graphene in the oil phase and its interfacial properties with the oil phase.

The invention discloses wear-resistant modified graphene lubricating oil and a preparation method thereof, and belongs to the technical field of lubricating oil, the wear-resistant modified graphene lubricating oil comprises the following raw materials: alkyl naphthalene base oil, sodium stearate, an antioxidant 5057, an organic silicon defoamer, polyisobutylene succinimide and a wear-resistant modified graphene additive; gamma-glycidyl ether oxypropyl trimethoxy silane is used for modifying graphene oxide in advance, accumulation between graphene sheet layers can be effectively prevented, agglomeration is avoided, then reduction is performed through vitamin C, residual oxygen-containing functional groups are removed, a conjugated structure is recovered, epoxy groups are reserved, and different from traditional hydrothermal synthesis, the preparation method has the advantages that the preparation method is simple, and the preparation cost is low. The graphene oxide and the carbon quantum dots only have physical adsorption, so that the graphene oxide and the carbon quantum dots can be prevented from falling off in high-pressure, strong-shearing-force and local high-temperature environments in the friction process, and the antifriction effect can be stably exerted for a long time.

The invention relates to the field of metal heat treatment quenching oil, and discloses cooling speed stable type overspeed quenching oil and a preparation method thereof. The cooling speed stable type overspeed quenching oil is prepared from the following raw materials in parts by weight: 85-95 parts of base oil, 2-4 parts of a cooling accelerant, 2-3 parts of a stabilizer, 1-3 parts of a dispersing agent, 0.5-1.5 parts of an antioxidant and 0.5-1 part of a brightener, the stabilizer is composed of ricinoleic acid polyester and polyalkyl methacrylate, and the dispersing agent is composed of stearoyl methacrylate and polyisobutylene succinimide. The overspeed quenching oil is used under the conditions of long-term high temperature and the like, has better quenching cooling stability, is not easy to deteriorate, and is suitable for industrial continuous heat treatment operation.

The invention belongs to the technical field of lubricating grease, and discloses a lubricating grease composition and a preparation method thereof, the lubricating grease composition contains base oil, modified graphene and a thickening agent; the modified graphene is prepared by carrying out ball milling on graphene and polyisobutylene succinimide in the presence of supercritical carbon dioxide; relative to 100 parts by weight of the base oil, the content of the modified graphene is 0.005-5 parts by weight. The lubricating grease composition provided by the invention has good stability, lubricity and extreme pressure property.

This invention discloses a high-temperature resistant and sun-protective coating for tea trays. The coating technology field includes the coating body and fillers. The coating body comprises the following components: water-based epoxy resin, methyl hexahydrophthalic anhydride, anhydrous sodium sulfate, polyisobutylene succinimide, and allyl polyoxyethylene ether. The fillers comprise the following components: nano-aluminum hydroxide, nano-titanium dioxide, spiral carbon nanotubes, nano-zirconium powder, pyroxene, and potassium hexatitanate whiskers. Tea trays coated with this coating form a high-strength coating on their surface, exhibiting high-temperature and sun-resistant properties.

This invention relates to the field of industrial lubricant additives, specifically to a novel multifunctional industrial oil compound, comprising, by weight, a sulfurized olefin extreme pressure anti-wear agent, a phenolic antioxidant, an amine antioxidant, a phosphate ester anti-wear agent, a boronized phosphorus-containing polyisobutylene succinimide dispersant, a thiocarbamate, dodecenyl succinic acid, and a metal deactivator; the weight ratio of the sulfurized olefin extreme pressure anti-wear agent to the phosphate ester anti-wear agent is 1.2:1 to 5:1; the number average molecular weight of the boronized phosphorus-containing polyisobutylene succinimide dispersant is 1000 to 3000. The novel multifunctional industrial oil compound provided by this invention, through scientific formulation design and optimized preparation process, effectively solves the technical defects of existing industrial oil compound agents and possesses multiple significant beneficial effects.

The invention relates to the field of printed circuit board production processes, in particular to an environment-friendly alkaline degreaser for a non-conductive printed circuit board material as well as a production process and application of the environment-friendly alkaline degreaser. The cleaning agent is prepared from the following raw materials: 70-90 g / L of an environment-friendly alkali source, 3-8 g / L of a surfactant, 5-12 g / L of a stabilizing auxiliary agent, 1-8 g / L of modified citrate, 0.1-0.5 g / L of an antioxidant and the balance of water, the environment-friendly alkali source is a mixture of a plurality of materials selected from sodium silicate, sodium hexametaphosphate, potassium hydroxide, trisodium phosphate, monoethanolamine and sodium gluconate, and at least one of the materials is potassium hydroxide; the stabilizing auxiliary agent is prepared from boronized polyisobutylene succinimide, branched polyether and a hydrophilic modified cellulose nanocrystal. According to the technical scheme, in the batch oil removal process, the oil removal uniformity and the oil removal effect are good, and the product quality and the production efficiency are guaranteed.

The invention provides a lubricating oil composition and a preparation method thereof. The lubricating oil composition of the present invention comprises: (A) a viscosity index improver; (B) a thio phenolic ester type antioxidant; (C) a polyisobutylene succinimide; (D) sulfurized olefin; (E) a dialkyl dithiocarbamic acid salt and / or a dialkyl dithiocarbamic acid ester; (F) a phosphate ester; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a lubricating base oil; wherein the viscosity index improver is a copolymer of methyl acrylic acid C8-C12 alkyl ester, methyl acrylic acid C13-C18 alkyl ester and N-vinyl imidazole. The lubricating oil composition disclosed by the invention has excellent extreme pressure anti-wear performance, viscosity-temperature performance, low-temperature flowing performance and dispersing performance, and is suitable for a wind power transmission system.

The application discloses alkylated hydrogen-rich vehicle fuel and a preparation method thereof, the raw material of the alkylated hydrogen-rich vehicle fuel comprises methanol, hydrogen activation release aids, polyisobutylene succinimide and di-tert-butyl peroxide; the production process comprises the following steps: preparation of hydrogen activation release aids, preparation of a primary catalyst, heat treatment and alkylation reaction of methanol, primary catalysis and secondary catalysis of methanol derivatives; the hydrogen-rich fuel production is integrated into a three-stage series process of methanol alkylation, primary catalysis dehydration and deoxidation and secondary catalysis reforming, and the problems of long traditional process flow, high risk of high temperature and high pressure, and serious hydrogen loss are overcome; the decyl trimethyl ammonium bromide-ammonia borane nano microsphere aid is prepared, the cleaner and the antioxidant are integrated, the controllable hydrogen release at high temperature, the stable storage at normal temperature, the oxidation inhibition and the carbon deposition inhibition are realized, and the fuel performance is improved; the multi-element synergistic catalyst is prepared, the acid site is regulated, the metal is anchored and the pore channel is constructed, and the high methanol conversion is realized.

The application relates to the field of printed circuit board production processes, in particular to an environment-friendly alkaline degreasing agent for non-conductive printed circuit board materials, a production process and application. The environment-friendly alkaline degreasing agent is composed of the following raw materials: 70-90 g / L of an environment-friendly alkali source, 3-8 g / L of a surfactant, 5-12 g / L of a stabilizing auxiliary agent, 1-8 g / L of modified citrate, 0.1-0.5 g / L of an antioxidant and the balance of water; the environment-friendly alkali source is a mixture of multiple kinds of sodium silicate, sodium hexametaphosphate, potassium hydroxide, trisodium phosphate, monoethanolamine and sodium gluconate, wherein at least one kind is potassium hydroxide; and the stabilizing auxiliary agent is composed of boronized polyisobutylene succinimide, branched polyether and hydrophilic modified cellulose nanocrystals. The above technical scheme can achieve uniformity and good degreasing effect in batch degreasing process, and guarantees the quality and production efficiency of products.

The invention relates to the technical field of coating film repairing lubricating oil, and particularly discloses a preparation method of efficient coating film repairing lubricating oil, molybdenum disulfide forms a directionally arranged layered structure on a friction surface, the friction coefficient can be effectively reduced, molybdenum disulfide and zinc dialkyl dithiophosphate cooperate to jointly construct a MoS2-ZnPO4 composite repairing layer, the bearing capacity is improved, and the service life of the lubricating oil is prolonged. The polytetrafluoroethylene reduces friction fluctuation under the condition of convenient lubrication and enhances the chemical stability of a repair layer, the calcium sulfonate neutralizes acidic wear products and prevents corrosive wear, the polyisobutylene succinimide prevents molybdenum disulfide, polytetrafluoroethylene and graphite from agglomerating, it is guaranteed that nano particles are evenly dispersed in the base oil, the storage stability is improved, and the wear resistance is improved. And the polymethacrylate anchors the metal surface through a polar group, so that the adhesive force of a repair layer is improved, a stable MoS2-ZnPO4-PTFE composite film can be formed on the friction surface, the friction power consumption is reduced, the preparation cost is low, and the oily adsorption effect is good.

The invention belongs to the technical field of petrochemical engineering, and particularly provides a hydrogenation scale inhibitor and a preparation method thereof, and the hydrogenation scale inhibitor comprises an antioxidant, a polymerization inhibitor, a polyisobutylene succinimide dispersant, a main agent and a solvent. The hydrogenation scale inhibitor prepared by the invention has the advantages of high scale inhibition efficiency, excellent dispersing performance and good high-temperature-resistant stability, can effectively inhibit coking and scale deposition in a hydrogenation device and prolong the operation cycle of equipment, and is suitable for high-temperature and high-pressure processes such as residual oil hydrogenation and hydrocracking.

A lubricating oil composition for hybrid engines including greater than 50 wt.% of the composition base oil; one or more polyisobutylene succinimide dispersant(s) (Mn 1600 g / mol or more), wherein the treat level of the higher molecular weight PIBSA-PAM is from 1.0 to 9.0 wt.% of the composition; and an overbased calcium and / or magnesium, salicylate or sulfonate detergent, or a combination thereof, wherein the detergent has a Total Base Number (KOH / g) at least 9 and no more than 500, and delivers at least 5 mmol of total soap to the composition. Also provided are methods of evaluating lubricating oil compositions for ranking performance in hybrid engines by running a bench scale test protocol based upon 3 test results: the emulsion dispersion and stability performance at all 4 test conditions in the Emulsion Stability test (modified ASTM D7563), the emulsion corrosion test, and the journal bearing wear test.

The invention discloses an alkylated hydrogen-rich vehicle fuel and a preparation method thereof. The alkylated hydrogen-rich vehicle fuel comprises the following raw materials: methanol, a hydrogen activation release auxiliary agent, polyisobutylene succinimide and di-tert-butyl peroxide. The production process comprises the following steps: preparation of a hydrogen activation release auxiliary agent, preparation of a primary catalyst, heat treatment and alkylation reaction of methanol, and primary catalysis and secondary catalysis of a methanol derivative. Hydrogen-rich fuel production is integrated into a three-section series flow of methanol alkylation, first-stage catalytic dehydration and deoxidation and second-stage catalytic reforming, and the problems that a traditional technological process is tedious, high in high-temperature and high-pressure risk and serious in hydrogen loss are solved; the decyl trimethyl ammonium bromide-ammonia borane nano-microsphere auxiliary agent is prepared, a cleaning agent and an antioxidant are integrated, controlled release of hydrogen at high temperature and stable storage at normal temperature are realized, oxidation is inhibited, deposited carbon is removed, and the fuel performance is improved; a multi-element synergistic catalyst is prepared, acid sites are regulated and controlled, metal is anchored, pore channels are constructed, and high conversion of methanol is achieved.

This invention belongs to the field of lubricating oil additives, specifically relating to a soot-dispersible polyisobutylene succinimide dispersant, its preparation method, and its application. The preparation method includes the following steps: (1) mixing polyisobutylene maleic anhydride, base oil, and aromatic solvent, stirring evenly, heating, adding polyethylene polyamine, introducing nitrogen gas, heating to the aromatic reflux temperature, and performing an amidation reaction to obtain product 1; (2) adding aminophenylboronic acid to product 1, continuing reflux, borizing reaction, removing the solvent by vacuum distillation, filtering, and obtaining the soot-dispersible polyisobutylene succinimide dispersant. The dispersant in this invention has the characteristic of good soot dispersion performance. The prepared product can improve the soot dispersion of oil products with a lower dosage. Moreover, the use of aminophenylboronic acid for borization reaction can improve high-temperature detergency. The preparation process of this invention is simple and easy to implement.

The invention discloses damping oil with low volatility and high viscosity index and a preparation method thereof, and relates to the technical field of damping oil, the damping oil comprises the following raw materials by mass percentage: 88-96% of composite base oil, 0.5-1.5% of polycarbodiimide, 1-3% of polyisobutylene succinimide, 1-3% of an antioxidant, 0.5-1.5% of a pour point depressant, and 1-3% of an extreme pressure agent; the composite base oil comprises poly-alpha-olefin and diester pentaerythritol ester, and the mass ratio of the poly-alpha-olefin to the diester pentaerythritol ester is (1.5-4): 1. The damping oil provided by the invention has excellent viscosity-temperature performance, excellent friction reduction and wear resistance and good oxidation resistance.

This invention discloses a high-temperature resistant downhole emulsion explosive and its preparation method, belonging to the field of emulsion explosive technology. The emulsion explosive comprises an aqueous phase material, an oil phase material, and a sensitizer, with a mass ratio of (88-96):(4-12):(0.8-2.0). The aqueous phase material, by mass parts, includes the following raw materials: 70-80 parts ammonium nitrate, 4-6 parts sodium nitrate, 5-8 parts urea, 0.1-0.6 parts chitosan quaternary ammonium salt, and 10-20 parts water. The oil phase material, by mass parts, includes the following raw materials: 50-70 parts composite oil phase and 20-40 parts composite emulsifier, which includes Span80 and polyisobutylene succinimide derivatives. This invention involves adding the aqueous phase material to the oil phase material, adding the sensitizer to the emulsion matrix formed by emulsification, and stirring to prepare the emulsion explosive. The emulsion explosive provided by this invention is suitable for use in deep well high-temperature environments and exhibits good high-temperature stability.

The invention relates to the technical field of rolling oil, and particularly discloses low-residual-carbon high-temperature-resistant hot rolling oil and a preparation method thereof, and the rolling oil comprises the following components by weight percent: 36-48% of mineral oil; 8-12% of vegetable oil; 12-18% of synthetic ester group; 0.4%-0.7% of an antioxidant; 1.6%-1.9% of an extreme pressure agent; 28-40% of special synthetic ester; 0.4-1.0% of an emulsifier; 0.8%-1.6% of a nano reinforcing agent; the nano reinforcing agent is a combination of nano silicon dioxide and nano boron nitride, the dispersing agent is polyisobutylene succinimide, and the rolling oil provided by the invention has the advantages of low residual carbon content, high extreme pressure property, excellent high temperature resistance and thick lubricating film.

The invention relates to a graphene lubricant with a self-repairing function and a preparation method thereof, and belongs to the technical field of lubricants, the lubricant comprises graphene oxide sheets with surfaces grafted with thiocarboxylate groups, base oil compounded by poly-alpha olefin and ester oil according to a ratio of 3.8: 1-4.5: 1, and a boron coordination modified polyisobutylene succinimide dispersant; when a lubricating film is broken, the exposed graphene oxide is driven by shearing force to be subjected to lamellar recombination, meanwhile, sulfur atoms and a metal substrate form sigma-coordinate bonds, and a gradient lubricating structure is reconstructed; the surface of the graphene oxide sheet is grafted with a specific sulfur-containing group, sheet layer recombination is triggered by utilizing mechanical shearing force during friction fracture, and meanwhile, sulfur atoms and metal are subjected to spontaneous coordination bonding, so that the self-repairing effect is achieved.

The invention provides a low-viscosity energy-saving engine lubricating oil composition and a preparation method thereof. The low-viscosity energy-saving engine lubricating oil composition comprises the following components: (A) phosphate ester and / or phosphate ester amine salt; (B) a composite antioxidant which comprises the following components: (1) an alkylated diphenylamine antioxidant; (2) a phenolic ester type antioxidant; (C) a polyisobutylene succinimide ashless dispersant; (D) magnesium sulfonate and / or calcium sulfonate; (E) zinc dialkyl dithiophosphate; (F) an ashless friction modifier; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a major amount of a lubricating base oil; wherein the structure of the phosphate ester and / or the phosphate ester amine salt is shown as a formula (X), and the definition of each group is shown in the specification. The low-viscosity energy-saving engine lubricating oil composition disclosed by the invention has excellent high-temperature oxidation resistance, cleaning performance, anti-wear and anti-friction performance and anti-corrosion performance, and can meet the requirements of GLV-1 and GLV-2 specifications.

The invention provides a lubricating oil composition and a preparation method thereof. The lubricating oil composition of the present invention comprises: (A) an alkyl phosphonate compound; (B) a thio phenolic ester type antioxidant; (C) a polyisobutylene succinimide ashless dispersant; (D) sulfurized olefin; (E) a dialkyl dithiocarbamic acid salt and / or a dialkyl dithiocarbamic acid ester; (F) an oil-soluble organic molybdenum friction modifier; (G) a metal corrosion inhibitor; (H) a pour point depressant; (I) a major amount of a lubricating base oil. The lubricating oil composition disclosed by the invention has excellent high-temperature oxidation resistance, extreme pressure wear resistance, corrosion resistance and storage stability, and is suitable for a wind power transmission system.