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CN-121975567-A - Low-energy-consumption high-efficiency oil-mixing long-acting lubricating oil and preparation method thereof

CN121975567ACN 121975567 ACN121975567 ACN 121975567ACN-121975567-A

Abstract

The invention discloses a low-energy-consumption high-efficiency mixed oil long-acting lubricating oil and a preparation method thereof, belonging to the technical field of high-performance lubricating oil. The two core additives are octadecyltrimethoxysilane modified rare earth fluoride doped hexagonal boron nitride nanosheets and organosilane functionalized molybdenum disulfide/zinc sulfide heterostructure nanospheres respectively. The method comprises the steps of preparing the rare earth fluoride by a pulse Joule heating and heat treatment composite process, realizing effective doping and anchoring of the rare earth fluoride on boron nitride, synthesizing a heterostructure by a hydrothermal method, and finishing surface modification in a weak acid buffer system. The prepared lubricating oil has good compatibility with various base oils, and the nano additive has excellent dispersion stability, can obviously reduce friction and abrasion, and realizes long-term lubrication.

Inventors

  • LI HAIMING

Assignees

  • 安徽德莱美科技有限公司

Dates

Publication Date
20260505
Application Date
20260331

Claims (10)

  1. 1. The preparation method of the low-energy-consumption high-efficiency oil-mixing long-acting lubricating oil is characterized by comprising the following steps of: S1, adding 80.0-95.0 parts of base oil into a three-neck flask in parts by weight, heating to 65-75 ℃ under the protection of nitrogen, stirring, sequentially adding 1.0-3.0 parts of dispersing agent and 0.5-1.5 parts of antioxidant, stirring, adding 0.05-0.5 part of octadecyltrimethoxysilane surface modified rare earth fluoride doped hexagonal boron nitride nano-plate and 0.1-1.0 part of organosilane functionalized molybdenum disulfide/zinc sulfide heterostructure nano-sphere, and stirring to obtain a pre-dispersed mixture; S2, carrying out ultrasonic treatment on the pre-dispersed mixture under the cooling of ice water bath, cooling to 48-52 ℃, adding 3.0-8.0 parts of viscosity index improver and 0.001-0.01 part of defoamer, stirring, and filtering.
  2. 2. The method for preparing the low-energy-consumption efficient oil-mixing long-acting lubricating oil according to claim 1, wherein in the step S1, the base oil is epoxidized soybean oil, the dispersing agent is polyisobutylene succinimide, and the antioxidant is alkylated diphenylamine.
  3. 3. The method for preparing a low-energy-consumption efficient oil-mixing long-acting lubricating oil according to claim 1, wherein in the step S2, the viscosity index improver is ethylene-propylene copolymer, and the defoamer is polysiloxane.
  4. 4. The preparation method of the low-energy-consumption efficient oil-mixing long-acting lubricating oil according to claim 1, which is characterized in that the preparation method of the octadecyltrimethoxysilane surface modified rare earth fluoride doped hexagonal boron nitride nano-sheet comprises the following steps: a1, mixing 8-12 parts of hexagonal boron nitride, 1-3 parts of anhydrous lanthanum chloride and 2-4 parts of ammonium fluoride under the protection of argon atmosphere to obtain a mixture, carrying out pulse Joule heating transient reaction on the mixture to obtain a reaction mixture, carrying out heat treatment on the reaction mixture at 450-550 ℃ in the argon atmosphere, cooling to obtain a product, washing the product with deionized water, and drying to obtain an intermediate; A2, dispersing 5 parts of intermediate in 48-52 parts of absolute ethyl alcohol, adding 0.8-1.2 parts of octadecyltrimethoxy silane, 2-3 parts of deionized water and 0.08-0.12 part of glacial acetic acid, stirring and reacting at 58-62 ℃, centrifuging and collecting precipitate after the reaction is finished, washing the precipitate with ethanol, and vacuum drying at 58-62 ℃.
  5. 5. The method for preparing the low-energy-consumption efficient oil-mixing long-acting lubricating oil according to claim 4, wherein in the step A1, the pulse Joule heating condition is that the single pulse voltage is 280-320V and the pulse time is 2-5 seconds.
  6. 6. The method for preparing a low-energy-consumption efficient oil-mixing long-acting lubricating oil according to claim 4, wherein in the step A2, the stirring reaction is carried out for 6-12 hours at 58-62 ℃.
  7. 7. The method for preparing the low-energy-consumption efficient oil-mixing long-acting lubricating oil according to claim 1, wherein the preparation method of the organosilane functionalized molybdenum disulfide/zinc sulfide heterostructure nanospheres comprises the following steps: B1, under continuous stirring, dissolving 4-6 parts of sodium molybdate and 6-8 parts of thioacetamide in a mixed solvent of 50-70 parts of deionized water and 35-45 parts of absolute ethyl alcohol, regulating the pH value to 3.8-4.2, adding 2-4 parts of zinc acetate and 0.4-0.6 part of sodium citrate, stirring to obtain a mixture, transferring the mixture to a high-pressure reaction kettle, reacting at 215-225 ℃, naturally cooling to 78-82 ℃, stirring, dropwise adding 3-5 parts of octadecyltrimethoxysilane, regulating the pH value to 4.3-4.7 by using an acetic acid-sodium acetate buffer solution, and stirring for reacting at 78-82 ℃ to obtain a reaction mixture; B2, centrifugally collecting a reaction mixture, washing the product by ethanol and acetone alternately, and drying in vacuum at 58-62 ℃.
  8. 8. The method for producing a low-energy efficient mixed oil long-acting lubricating oil according to claim 7, wherein in the step B1, the reaction time is 18 to 20 hours at 215 to 225 ℃.
  9. 9. The method for producing a low-energy-consumption efficient oil-blending long-acting lubricating oil according to claim 7, wherein in the step B2, the time of vacuum drying at 58 to 62 ℃ is 24 to 30 hours.
  10. 10. A low-energy-consumption efficient oil-mixing long-acting lubricating oil, characterized in that the low-energy-consumption efficient oil-mixing long-acting lubricating oil is prepared according to the preparation method of the low-energy-consumption efficient oil-mixing long-acting lubricating oil according to any one of claims 1 to 9.

Description

Low-energy-consumption high-efficiency oil-mixing long-acting lubricating oil and preparation method thereof Technical Field The invention relates to the technical field of high-performance lubricating oil, in particular to low-energy-consumption high-efficiency oil-mixing long-acting lubricating oil and a preparation method thereof. Background With the continuous development of global industrial equipment to high speed, heavy load, precision and long service life, and the urgent requirements for energy conservation and emission reduction, the requirements for lubricating oil performance are also becoming severe. Traditional lubricating oil mainly depends on physical properties of base oil and chemical actions of organic functional additives, and antifriction and antiwear properties, service life and adaptability to different working conditions of the traditional lubricating oil are gradually approaching to bottlenecks. Especially when facing extreme pressure, temperature fluctuation, long-term service and other complex conditions, the problems of insufficient oil film strength, easy decomposition and failure of additives and the like of the traditional lubricating oil are remarkable, so that the abrasion of mechanical parts is aggravated, the energy efficiency is reduced, and the maintenance cost is increased. Therefore, development of novel high-performance lubricating oil with ultra-low friction, excellent wear resistance, excellent oxidation stability and long service life has become an important technical requirement in the fields of advanced manufacturing industry, transportation industry and the like, and is one of key links for promoting industrial energy conservation and consumption reduction. In order to break through the limitation of the traditional additive system, the nano technology is widely introduced into the lubrication field, and various inorganic nano materials show great potential as lubricating oil additives. Wherein, lamellar materials such as hexagonal boron nitride and molybdenum disulfide are regarded as ideal solid lubricants due to their unique lamellar structure and low shear strength, while nanoparticles such as zinc oxide, zinc sulfide and the like have good bearing and antiwear properties. However, the direct application of these nanomaterials to lubricating oil systems still presents a number of significant challenges. The primary problem is that the dispersion stability of the nano particles in nonpolar or low-polar base oil is extremely poor, and the nano particles are extremely easy to agglomerate and settle due to extremely high surface energy, so that the nano particles cannot exert the due lubricating function, and the nano particles can block an oil path and become a source of abrasive particle abrasion. Secondly, most unmodified inorganic nano particles have weak compatibility and interface binding force with the surfaces of base oil and metal friction pairs, are easy to run off in the friction process, and cannot form a durable and effective protective film. In addition, the existing preparation method of the nano additive often involves high-temperature long-time reaction, complex post-treatment or expensive reagent use, so that the production cost is high, the energy consumption is high, the accurate regulation and control of the surface property and structure of the nano additive are difficult to realize, and the industrialized application and the further improvement of the property are restricted. Aiming at the technical bottleneck, the invention aims to develop low-energy-consumption high-efficiency oil-mixing long-acting lubricating oil and an innovative preparation method thereof. The core concept of the invention is to design and synthesize two novel inorganic nano composite additives with specific structures and carefully modified surfaces. The first additive is prepared by anchoring rare earth fluoride nano-crystallites in situ on hexagonal boron nitride nanoplatelets and then surface modification with a long chain silane coupling agent. The design not only utilizes the ideas of rare earth fluoride to promote the surface activity of the material and strengthen the tribochemical film, but also imparts excellent oil solubility to the nano-sheet through silanization. The second additive is to construct hetero-structure nanospheres of molybdenum disulfide and zinc sulfide, and the surface organic functionalization is also carried out. The heterostructure can produce a synergistic lubricating effect, and the spherical morphology and the surface modification layer together ensure stable suspension of the heterostructure in oil. In the preparation process, the invention combines the rapid and low-energy-consumption solid synthesis technology of pulse Joule heating with controllable hydrothermal synthesis and one-step surface modification strategies, thereby remarkably reducing the overall energy consumption. Finally, the two modified nano additives are compounde