CN114317069A - Vegetable oil-based nano lubricating oil additive and preparation method thereof - Google Patents
Vegetable oil-based nano lubricating oil additive and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a vegetable oil-based nano lubricating oil additive and a preparation method thereof, belonging to the technical field of lubricating oil. The lubricating oil additive comprises 10-20 parts of base oil, 1-3 parts of surfactant, 1-3 parts of repair nano particles, 0.5-1.5 parts of superfine boron nitride, 0.1-0.5 part of preservative and 0.3-0.5 part of bactericide. The method for preparing the repairing nano particles comprises the steps of preparing a Cu-graphene oxide compound by an in-situ synthesis method, adding superfine boron nitride, reducing agglomeration, effectively filling surface scratches and reducing mechanical damage, and realizing the effects of reducing abrasion and resisting abrasion by the synergistic effect of the Cu-graphene oxide compound and the superfine boron nitride. The additive is suitable for various lubricating oils, has small addition amount, obvious lubricating effect, safe, environment-friendly and pollution-free raw materials and low cost, has wide economic and social benefits, and is worthy of large-scale popularization and application.
Description
Technical Field
The invention belongs to the technical field of lubricating oil, and particularly relates to a vegetable oil-based nano lubricating oil additive and a preparation method thereof.
Background
Friction is an inevitable natural phenomenon that accounts for 1/3 total fuel consumption of fuel used annually to reduce the frictional wear of mechanical parts, and in addition, friction can cause an undesirable loss of mechanical energy, shortening the life of the machine and reducing the mechanical efficiency. In order to solve the above problems, it is important to find a substance capable of reducing friction and wear, and therefore, lubricating oil is often added, and in order to improve the tribological properties of lubricating oil, an appropriate additive is often added to the lubricating oil.
The lubricating oil additive is a single agent or a mixture of a plurality of single agents which are mixed according to a certain proportion and a blending technology and can meet the requirement of a certain quality grade. In the field of lubrication, zinc dialkyldithiophosphate (ZDDP) is the most widely used multifunctional lubricating oil additive, but development of environmentally friendly and effective lubricating oil additives has become a research hotspot in this field due to corrosion of zinc ions to metals and pollution of phosphorus to the environment.
The nano science and technology is considered as a new technology facing the 21 st century, and the excellent characteristics of the nano science and technology attract the wide attention of researchers. In recent years, nano materials show important application value and wide application prospect in the fields of light, electricity, magnetism and the like, and meanwhile, the nano particles have excellent characteristics which are not possessed by a plurality of traditional conventional materials, so that the nano particles show special and excellent physicochemical properties and enter the visual field of people. The nano particles are used as lubricating oil additives, and the advantages are mainly reflected in the following three aspects: the diffusion capacity and the self-diffusion capacity of the nano particles are stronger, and a permeable layer or a diffusion layer with good wear resistance is easily formed on the surface of the metal, so that the friction-reducing and wear-resisting effects are achieved; secondly, the nano particles have the characteristic of small particle size, are approximately spherical in shape, can roll between friction pairs, play a role similar to a ball bearing, and change the friction form from sliding friction to rolling friction so as to reduce the friction coefficient; and thirdly, the nano particles can polish and strengthen the friction surface and support the external load, so that the bearing capacity is improved.
However, the extremely fine grains of the nanoparticles cause the particles to have huge surface energy, and in addition, the attractive force existing among the particles has a great tendency to self-aggregate among the particles, and a large blocky aggregate can be formed after a certain time, so that the problem of poor dispersion stability exists in the oil product. Additionally containing MoS2The lubricant (A) may chemically react with the contact surface, thereby generating frictional heat, causing oxidation, and having negative effects on the oxidation stability of the oil product; when the lubricant contains organic PTFE, the thermal conductivity and oxidation resistance of the lubricant are deteriorated.
And the nano particles are used as a lubricating oil additive, and have single function, the nano particles are agglomerated and are unevenly dispersed in the base oil, so that the wear-resistant and wear-reducing effects are poor, and the good lubricating effect cannot be achieved.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the vegetable oil-based nano lubricating oil additive and the preparation method thereof, and the vegetable oil-based nano lubricating oil additive is safe, environment-friendly and pollution-free, has good stability and strong dispersibility, ensures good grinding-assisted lubricating effect and has a certain self-repairing function.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
the vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 10-20 parts of base oil, 1-3 parts of surfactant, 1-3 parts of repair nano particles, 0.5-1.5 parts of superfine boron nitride, 0.1-0.5 part of preservative and 0.3-0.5 part of bactericide.
Preferably, the base oil is one or more of corn oil, peanut oil or soybean oil.
Preferably, the surfactant is tween 60 or polyoxyethylene polyoxypropylene pentaerythritol ether.
Preferably, the preparation method of the repair nanoparticle comprises the following steps: and (2) preparing graphene oxide according to the mass-volume ratio of 1-5 g: 50ml of the solution is evenly dispersed in the absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 1-5 percent of the mass of the mixed solution is added under the condition of continuous stirring, 1-octadecene with the mass of 0.1-0.5 percent of the mass of the mixed solution is added, then the mixture is put into a high-pressure homogenizer and circulated for 5-10 times under the condition of 20-30MPa, and the product is dried in a vacuum oven for 24-48h at the temperature of 50-70 ℃ to obtain the repair nano particles.
Preferably, the preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30-60 minutes, adding gamma-aminopropyltriethoxysilane accounting for 0.1-0.3% of the mass of the mixed solution, continuously stirring for 30-60 minutes, drying, adding the dried solid powder into a planetary ball mill, and ball-milling for 24-48 hours at the ball mill rotation speed of 200 plus materials/min to obtain the superfine boron nitride.
Preferably, the dosage ratio of the boron nitride to the sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
Preferably, the preservative is potassium sorbate.
Preferably, the bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing the repair nano particles: and (2) preparing graphene oxide according to the mass-volume ratio of 1-5 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 1-5% by mass of the mixed solution under continuous stirring, adding 0.1-0.5% by mass of 1-octadecene, then placing the mixture into a high-pressure homogenizer, circulating for 5-10 times under the condition of 20-30MPa, and drying the product in a vacuum oven at 50-70 ℃ for 24-48h to obtain the repair nanoparticles;
(2) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30-60 minutes, adding gamma-aminopropyltriethoxysilane accounting for 0.1-0.3% of the mass of the mixed solution, continuously stirring for 30-60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 24-48 hours at the ball mill rotation speed of 200-;
(3) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring at constant temperature for 12-24h, and naturally cooling to obtain the vegetable oil-based nano lubricating oil additive.
The raw materials of the invention are commercially available, and the additive of the invention can be used as an additive of lubricating oil, and can be added into commercially available lubricating oil for use, and the dosage of the additive is 0.1-0.5% of the mass of the lubricating oil.
Advantageous effects
The invention takes vegetable oil as base oil to prepare the lubricating oil additive with good dispersibility and strong stability. According to the preparation method, the repair nanoparticles are prepared, the Cu-graphene oxide compound is prepared through an in-situ synthesis method, and with the help of graphene oxide, the Cu nanoparticles can be better subjected to electrostatic adsorption in a friction process, so that a thin protective film is easier to form, and friction damage is reduced. Meanwhile, the superfine boron nitride is added, the superfine boron nitride has a lamellar structure similar to graphite, the gamma-aminopropyl triethoxysilane modified boron nitride can promote the uniform dispersion of the repaired nano particles with similar structures and reduce agglomeration, and meanwhile, the gamma-aminopropyl triethoxysilane modified boron nitride can effectively fill surface scratches and reduce mechanical damage, and the two synergistic effects can jointly realize the effects of reducing abrasion and resisting wear. In addition, the addition of the preservative can improve the stability of a vegetable oil system, and the addition of the bactericide can assist the preservative, reduce the action of microorganisms and prolong the service life of the lubricating oil.
The lubricating oil additive is suitable for adding various lubricating oils, has small addition amount, obvious lubricating effect, safe, environment-friendly and pollution-free raw materials and low cost, has wide economic and social benefits, and is worthy of large-scale popularization and application.
Drawings
FIG. 1 is a schematic diagram of the wear patterns of test samples subjected to a test performance test using example 4 and comparative examples 1 to 3 as lubricating oil additives.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments, but is not limited thereto.
Example 1
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 10 parts of base oil, 1 part of surfactant, 1 part of repair nano particles, 0.5 part of superfine boron nitride, 0.1 part of preservative and 0.3 part of bactericide.
The base oil is corn oil.
The surfactant is tween 60.
The preparation method of the repair nano particle comprises the following steps: and (2) mixing graphene oxide according to the mass-volume ratio of 1 g: 50ml of the solution is evenly dispersed in the absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 1 percent of the mixed solution mass is added under the condition of continuous stirring, 1-octadecene with the mixed solution mass of 0.1 percent is added, then the mixture is put into a high-pressure homogenizer to be circulated for 5 times under the condition of 20MPa, and the product is dried in a vacuum oven for 24 hours at the temperature of 50-70 ℃ to obtain the repair nano particles.
The preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.1% of the mixed solution, continuously stirring for 30 minutes, drying, adding the dried solid powder into a planetary ball mill, rotating at the speed of 200 rpm, and ball-milling for 24 hours to obtain the superfine boron nitride.
The dosage ratio of the boron nitride to the sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing the repair nano particles: and (2) mixing graphene oxide according to the mass-volume ratio of 1 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 1% by mass of the mixed solution under continuous stirring, adding 0.1% by mass of 1-octadecene, then placing the mixture into a high-pressure homogenizer, circulating for 5 times under the condition of 20MPa, and drying the product in a vacuum oven at 50 ℃ for 24 hours to obtain the repair nanoparticles;
(2) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.1% of the mixed solution, continuously stirring for 30 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 24 hours at the ball mill rotation speed of 200 rpm to obtain superfine boron nitride;
(3) heating base oil to 80 ℃, sequentially adding a surfactant, the repair nano particles, superfine boron nitride, a preservative and a bactericide under a stirring state, continuously stirring for 12 hours at a constant temperature, and naturally cooling to obtain the vegetable oil-based nano lubricating oil additive.
Each of the materials of this example is commercially available, and the additive of this example is used as an additive for lubricating oils, and can be added to commercially available lubricating oils in an amount of 0.1 to 0.5% by mass based on the lubricating oil.
Example 2
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 15 parts of base oil, 2 parts of surfactant, 2 parts of repair nano particles, 1 part of superfine boron nitride, 0.3 part of preservative and 0.3 part of bactericide.
The base oil is peanut oil.
The surfactant is polyoxyethylene polyoxypropylene pentaerythritol ether.
The preparation method of the repair nano particle comprises the following steps: and (2) mixing graphene oxide according to a mass-volume ratio of 2 g: 50ml of the solution is uniformly dispersed in an absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 2 percent of the mass of the mixed solution is added under the condition of continuous stirring, 1-octadecene with the mass of 0.2 percent of the mass of the mixed solution is added, then the mixture is put into a high-pressure homogenizer to be circulated for 5 times under the condition of 20MPa, and the product is dried in a vacuum oven at 70 ℃ for 24 hours to obtain the repair nano particles.
The preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.1% of the mixed solution, continuously stirring for 30 minutes, drying, adding the dried solid powder into a planetary ball mill, rotating at the speed of 200 rpm, and ball-milling for 24 hours to obtain the superfine boron nitride.
The dosage ratio of the boron nitride to the sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing the repair nano particles: and (2) mixing graphene oxide according to a mass-volume ratio of 2 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 2% of the mass of the mixed solution under continuous stirring, adding 0.2% of 1-octadecene, then placing the mixture into a high-pressure homogenizer, circulating for 5 times under the condition of 20MPa, and drying the product in a vacuum oven at 70 ℃ for 24 hours to obtain the repair nanoparticles;
(2) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.1% of the mixed solution, continuously stirring for 30 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 24 hours at the ball mill rotation speed of 200 rpm to obtain superfine boron nitride;
(3) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring at constant temperature for 12 hours, and naturally cooling to obtain the plant oil-based nano lubricating oil additive.
Each of the materials of this example is commercially available, and the additive of this example is used as an additive for lubricating oils, and can be added to commercially available lubricating oils in an amount of 0.1 to 0.5% by mass based on the lubricating oil.
Example 3
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 17 parts of base oil, 2 parts of surfactant, 2 parts of repair nano particles, 1.1 parts of superfine boron nitride, 0.4 part of preservative and 0.4 part of bactericide.
The base oil is soybean oil.
The surfactant is polyoxyethylene polyoxypropylene pentaerythritol ether.
The preparation method of the repair nano particle comprises the following steps: and (3) mixing graphene oxide according to a mass-volume ratio of 3 g: 50ml of the solution is uniformly dispersed in an absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 1mol/L and the mass of 3 percent of the mixed solution is added under the condition of continuous stirring, 1-octadecene with the mass of 0.3 percent of the mixed solution is added, then the mixture is put into a high-pressure homogenizer and circulated for 10 times under the condition of 30MPa, and the product is dried in a vacuum oven at 70 ℃ for 48 hours to obtain the repair nano particles.
The preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 60 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.3% of the mixed solution, continuously stirring for 60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 48 hours at the rotating speed of 300 r/min to obtain the superfine boron nitride.
The dosage ratio of the boron nitride to the sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing the repair nano particles: and (3) mixing graphene oxide according to a mass-volume ratio of 3 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 3% of the mixed solution by mass under continuous stirring, adding 0.3% of 1-octadecene by mass of the mixed solution, then placing the mixture into a high-pressure homogenizer, circulating for 10 times under the condition of 30MPa, and drying the product in a vacuum oven at 70 ℃ for 48 hours to obtain the repaired nanoparticles;
(2) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 60 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.3% of the mixed solution, continuously stirring for 60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 48 hours at the rotating speed of 300 r/min to obtain superfine boron nitride;
(3) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring for 24 hours at constant temperature, and naturally cooling to obtain the plant oil-based nano lubricating oil additive.
Each of the materials of this example is commercially available, and the additive of this example is used as an additive for lubricating oils, and can be added to commercially available lubricating oils in an amount of 0.1 to 0.5% by mass based on the lubricating oil.
Example 4
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 20 parts of base oil, 3 parts of surfactant, 3 parts of repair nano particles, 1.5 parts of superfine boron nitride, 0.5 part of preservative and 0.5 part of bactericide.
The base oil is corn oil.
The surfactant is tween 60.
The preparation method of the repair nano particle comprises the following steps: and (2) mixing graphene oxide according to a mass-volume ratio of 5 g: 50ml of the solution is uniformly dispersed in an absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 5 percent of the mass of the mixed solution is added under the condition of continuous stirring, 1-octadecene with the mass of 0.5 percent of the mass of the mixed solution is added, then the mixture is put into a high-pressure homogenizer and circulated for 10 times under the condition of 30MPa, and the product is dried in a vacuum oven at 70 ℃ for 48 hours to obtain the repair nano particles.
The preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 60 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.3% of the mixed solution, continuously stirring for 60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 48 hours at the rotating speed of 300 r/min to obtain the superfine boron nitride.
The dosage ratio of the boron nitride to the sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing the repair nano particles: and (2) mixing graphene oxide according to a mass-volume ratio of 5 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 5% of the mixed solution by mass under continuous stirring, adding 0.5% of 1-octadecene by mass of the mixed solution, then placing the mixture into a high-pressure homogenizer, circulating for 10 times under the condition of 30MPa, and drying the product in a vacuum oven at 70 ℃ for 48 hours to obtain the repaired nanoparticles;
(2) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 60 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.3% of the mixed solution, continuously stirring for 60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 48 hours at the rotating speed of 300 r/min to obtain superfine boron nitride;
(3) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring for 24 hours at constant temperature, and naturally cooling to obtain the plant oil-based nano lubricating oil additive.
Each of the materials of this example is commercially available, and the additive of this example is used as an additive for lubricating oils, and can be added to commercially available lubricating oils in an amount of 0.1 to 0.5% by mass based on the lubricating oil.
Comparative example 1
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 20 parts of base oil, 3 parts of surfactant, 3 parts of repair nano particles, 1.5 parts of superfine boron nitride, 0.5 part of preservative and 0.5 part of bactericide.
The base oil is corn oil.
The surfactant is tween 60.
The repair nano particles are graphene oxide.
The preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 60 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.3% of the mixed solution, continuously stirring for 60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 48 hours at the rotating speed of 300 r/min to obtain the superfine boron nitride.
The dosage ratio of the boron nitride to the sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 60 minutes, adding gamma-aminopropyltriethoxysilane with the mass of 0.3% of the mixed solution, continuously stirring for 60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 48 hours at the rotating speed of 300 r/min to obtain superfine boron nitride;
(2) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring for 24 hours at constant temperature, and naturally cooling to obtain the plant oil-based nano lubricating oil additive.
In the comparative example, except that the repair nanoparticles are replaced by graphene oxide, the rest of the raw materials and the preparation method are partially the same as those in example 4.
Comparative example 2
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 20 parts of base oil, 3 parts of surfactant, 3 parts of repair nano particles, 1.5 parts of boron nitride, 0.5 part of preservative and 0.5 part of bactericide.
The base oil is corn oil.
The surfactant is tween 60.
The preparation method of the repair nano particle comprises the following steps: and (2) mixing graphene oxide according to a mass-volume ratio of 5 g: 50ml of the solution is uniformly dispersed in an absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 5 percent of the mass of the mixed solution is added under the condition of continuous stirring, 1-octadecene with the mass of 0.5 percent of the mass of the mixed solution is added, then the mixture is put into a high-pressure homogenizer and circulated for 10 times under the condition of 30MPa, and the product is dried in a vacuum oven at 70 ℃ for 48 hours to obtain the repair nano particles.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) preparing the repair nano particles: and (2) mixing graphene oxide according to a mass-volume ratio of 5 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 5% of the mixed solution by mass under continuous stirring, adding 0.5% of 1-octadecene by mass of the mixed solution, then placing the mixture into a high-pressure homogenizer, circulating for 10 times under the condition of 30MPa, and drying the product in a vacuum oven at 70 ℃ for 48 hours to obtain the repaired nanoparticles;
(2) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring for 24 hours at constant temperature, and naturally cooling to obtain the plant oil-based nano lubricating oil additive.
This comparative example is similar to example 4 in part in the raw materials and preparation method except that the ultrafine boron nitride was replaced with commercially available ordinary boron nitride.
Comparative example 3
The vegetable oil-based nano lubricating oil additive is prepared from the following raw materials in parts by weight: 20 parts of base oil, 3 parts of surfactant, 3 parts of repair nano particles, 1.5 parts of boron nitride, 0.5 part of preservative and 0.5 part of bactericide.
The base oil is corn oil.
The surfactant is tween 60.
The repair nano particles are graphene oxide.
The preservative is potassium sorbate.
The bactericide is isothiazolinone.
A preparation method of a vegetable oil-based nano lubricating oil additive comprises the following steps:
(1) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring for 24 hours at constant temperature, and naturally cooling to obtain the plant oil-based nano lubricating oil additive.
In the comparative example, except that the superfine boron nitride is replaced by the commercially available common boron nitride and the repair nanoparticles are replaced by the graphene oxide, the rest of the raw materials and the preparation method are partially the same as those in example 4.
Performance testing
The saturated polyol ester 3970 produced by Croda Heda company was used as a base oil, and the lubricating oil additives obtained in examples 1 to 4 of the present invention and comparative examples 1 to 3 were added in an amount of 0.1% by mass based on the base oil, and the performance of the resulting lubricating oil was tested:
the thermal stability is tested according to SH/T0680-1999, the oxidation stability is tested according to SH/T0193-2008, the kinematic viscosity is tested according to GB/T11137-1989, the viscosity index is tested according to NFT60-136-2004, the biodegradability is tested according to CEC L-33-A-93, and the wear resistance of the lubricating oil is tested according to GB/T3142-1982(2004) Lubricant bearing capacity test method (four-ball method).
Dispersibility: after standing for 72h, the lubricant morphology was observed. And respectively carrying out ultrasonic treatment for 4h, centrifuging at 2000r/min for 30min, standing for 72h, observing the form of the lubricating oil again, and recording the experimental result.
Table 1 results of performance testing
As can be seen from the data in the table, the lubricating oil obtained in the embodiment of the invention has better stability and lubricating and antiwear properties, but the lubricating oil obtained in the embodiment of the invention has the advantages that the synergistic effect among the raw materials disappears or is weakened, and all the properties of the lubricating oil are reduced to different degrees in the comparative example 1 lacking the repairing nano particles, the comparative example 2 lacking the superfine boron nitride and the comparative example 3 changing the superfine boron nitride, because the graphene and the boron nitride lacking the corresponding modification means have the reduced dispersibility, the uniform dispersion cannot be realized, the synergistic effect disappears, and the abrasion resistance is directly reduced.
It can also be seen from the topographical map of the abrasive grits in FIG. 1 that the comparative examples all exhibited furrows in parallel alignment with evident scratches, whereas example 4 of the present invention exhibited the best overall finish of the grits, with finer and shallower abrasive grits and no apparent furrows. The lubricating oil obtained by the lubricating oil additive disclosed by the embodiment of the invention has a small steel ball friction coefficient, and has a good repairing effect on the surface, so that the anti-wear and anti-wear properties of an oil sample are improved.
It should be noted that the above-mentioned embodiments are only some of the preferred modes for implementing the invention, and not all of them. Obviously, all other embodiments obtained by persons of ordinary skill in the art based on the above-mentioned embodiments of the present invention without any creative effort shall fall within the protection scope of the present invention.
Claims (9)
1. The vegetable oil-based nano lubricating oil additive is characterized by being prepared from the following raw materials in parts by weight: 10-20 parts of base oil, 1-3 parts of surfactant, 1-3 parts of repair nano particles, 0.5-1.5 parts of superfine boron nitride, 0.1-0.5 part of preservative and 0.3-0.5 part of bactericide.
2. The vegetable oil-based nano-grade lubricating oil additive of claim 1, wherein the base oil is one or more of corn oil, peanut oil, or soybean oil.
3. The vegetable oil-based nano-lubricating oil additive of claim 1, wherein the surfactant is tween 60 or polyoxyethylene polyoxypropylene pentaerythritol ether.
4. The vegetable oil-based nano-lubricating oil additive of claim 1, wherein the method of preparing the repair nanoparticles is: and (2) preparing graphene oxide according to the mass-volume ratio of 1-5 g: 50ml of the solution is evenly dispersed in the absolute ethyl alcohol solution, 1mol/L copper chloride solution with the concentration of 1-5 percent of the mass of the mixed solution is added under the condition of continuous stirring, 1-octadecene with the mass of 0.1-0.5 percent of the mass of the mixed solution is added, then the mixture is put into a high-pressure homogenizer and circulated for 5-10 times under the condition of 20-30MPa, and the product is dried in a vacuum oven for 24-48h at the temperature of 50-70 ℃ to obtain the repair nano particles.
5. The vegetable oil-based nano-lubricating oil additive of claim 1, wherein the preparation method of the superfine boron nitride comprises the following steps: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30-60 minutes, adding gamma-aminopropyltriethoxysilane accounting for 0.1-0.3% of the mass of the mixed solution, continuously stirring for 30-60 minutes, drying, adding the dried solid powder into a planetary ball mill, and ball-milling for 24-48 hours at the ball mill rotation speed of 200 plus materials/min to obtain the superfine boron nitride.
6. The vegetable oil-based nano-lubricating oil additive of claim 5, wherein the ratio of the amount of boron nitride to the amount of sodium hydroxide solution is 10 g: 50mL, and the concentration of the sodium hydroxide solution is 1 mol/L.
7. The vegetable oil-based nanolube additive of claim 1, wherein said preservative is potassium sorbate.
8. The vegetable oil-based nano-lubricating oil additive of claim 1, wherein the bactericide is an isothiazolinone.
9. A method for preparing the vegetable oil-based nano lubricating oil additive according to any one of claims 1 to 8, comprising the steps of:
(1) preparing the repair nano particles: and (2) preparing graphene oxide according to the mass-volume ratio of 1-5 g: uniformly dispersing 50ml of the solution in absolute ethyl alcohol, adding 1mol/L copper chloride solution with the concentration of 1-5% by mass of the mixed solution under continuous stirring, adding 0.1-0.5% by mass of 1-octadecene, then placing the mixture into a high-pressure homogenizer, circulating for 5-10 times under the condition of 20-30MPa, and drying the product in a vacuum oven at 50-70 ℃ for 24-48h to obtain the repair nanoparticles;
(2) preparing superfine boron nitride: soaking boron nitride powder in a sodium hydroxide solution, heating to boil, keeping boiling for 30-60 minutes, adding gamma-aminopropyltriethoxysilane accounting for 0.1-0.3% of the mass of the mixed solution, continuously stirring for 30-60 minutes, drying, adding the dried solid powder into a planetary ball mill, and performing ball milling for 24-48 hours at the ball mill rotation speed of 200-;
(3) heating base oil to 80-90 ℃, sequentially adding a surfactant, repair nanoparticles, superfine boron nitride, a preservative and a bactericide under stirring, continuously stirring at constant temperature for 12-24h, and naturally cooling to obtain the vegetable oil-based nano lubricating oil additive.
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