A magnesium hydroxyl silicate nano lubricating oil additive, a preparation method and application thereof

Abstract

The application discloses a kind of magnesium hydroxyl silicate nano lubricating oil additives and its preparation method and application, it is related to lubricating oil technical field.The application includes the following three steps:1.organic modification is carried out to magnesium hydroxyl silicate nano material;2.magnesium oxide particle modification;3.preparation modified nano lubricating oil.The application is based on organic modification of magnesium hydroxyl silicate composite particles using high-grade mercaptan, introduces magnesium atom into the alkyl of modified molecule, which not only improves its dispersion stability in lubricating oil, but also improves the utilization rate of modified particles in the friction process, and lays a good foundation for its application in industry.

Description

Technical Field

[0001] This invention relates to the field of lubricating oil technology, and in particular to a magnesium hydroxysilicate nano lubricating oil additive, its preparation method, and its application. Background Technology

[0002] Most mechanical equipment parts fail due to wear exceeding limits. Approximately one-third to one-half of the world's energy consumption is due to friction, and 80% of component failures are caused by wear. Minimizing unnecessary frictional consumption can save significant amounts of energy. Using lubricating oils / greases is one of the main ways to reduce friction and wear failures in mechanical equipment. Anti-friction and anti-wear additives in lubricating oils can further improve their tribological properties. Nano-hydroxy magnesium silicate composite materials are a type of lubricating oil additive material with excellent anti-friction, anti-wear, and self-healing properties; they are a novel and environmentally friendly lubricating material. For example, patent CN110436444A discloses a method for preparing magnesium silicate / carbon composite nanomaterials. The magnesium silicate / carbon composite nanomaterials synthesized by this method, when used as a lubricating oil additive, can significantly reduce friction and wear. Patent CN113502182A discloses a method for preparing nanorod-shaped magnesium hydroxysilicate / molybdenum disulfide composite materials. The resulting nanorod-shaped magnesium hydroxysilicate / molybdenum disulfide composite material, when used as a lubricating oil additive, can significantly reduce the friction coefficient and wear, and can repair 20-50% of worn surfaces, thereby greatly extending equipment lifespan and saving energy. However, the nano-hydroxysilicate composite materials synthesized in the above patent application exhibit poor dispersion stability in lubricating oil, easily agglomerating and settling, severely limiting their industrial application. Summary of the Invention

[0003] Based on the above-mentioned technical problems, the present invention provides a magnesium hydroxysilicate nano-lubricating oil additive, its preparation method and application.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] A method for preparing a magnesium hydroxysilicate nano-lubricating oil additive includes the following steps:

[0006] (1) Mix the magnesium hydroxysilicate composite particles with a thiol solution evenly, and then heat them in an oil bath under a nitrogen atmosphere to obtain thiol-modified magnesium hydroxysilicate composite particle powder.

[0007] (2) Thiol-modified magnesium hydroxysilicate composite particles were added to a dilute hydrochloric acid solution, heated and kept warm, magnesium oxide particles were added, and after stirring evenly, the mixture was irradiated under ultraviolet light to obtain magnesium hydroxysilicate nano lubricant additive.

[0008] Preferably, the thiol in step (1) is a higher thiol.

[0009] More preferably, the thiol in step (1) is hexadecyl thiol or octadecyl thiol.

[0010] Preferably, the magnesium hydroxysilicate composite particles in step (1) are composite particles containing magnesium hydroxysilicate, including one or more of magnesium hydroxysilicate / molybdenum disulfide composite particles, magnesium hydroxysilicate / nickel composite particles, and magnesium hydroxysilicate / carbon composite particles.

[0011] Preferably, the mass ratio of thiol to magnesium hydroxysilicate composite particles in the thiol solution in step (1) is (0.015-0.03):1, and more preferably (0.02-0.024):1.

[0012] Preferably, the oil bath heating temperature in step (1) is 80℃~100℃, and the heating time is 36h~48h.

[0013] Preferably, the concentration of the dilute hydrochloric acid in step (2) is 0.1 mol / L to 0.3 mol / L, the heating and heat preservation are carried out by heating to 40℃ to 70℃ and then keeping it at that temperature for 1h to 3h, and the irradiation time under ultraviolet light is 3h to 5h.

[0014] Preferably, the particle size of the magnesium oxide particles in step (2) is 1 to 100 nm, and the mass ratio of the magnesium oxide particles to the magnesium hydroxysilicate composite particles is 1 to 2:1.

[0015] Preferably, the preparation method of magnesium hydroxysilicate nano-lubricant additives specifically includes the following steps:

[0016] 1. Organic modification of magnesium hydroxysilicate nanomaterials

[0017] S1: Weigh a certain mass of magnesium hydroxysilicate composite granules and add them to a beaker. Then, use a dropper to add a certain volume of thiol solution to the powder. After the solution has fully wetted the powder, stir it evenly with a glass rod and sonicate it to obtain a mixture of the two. Place the mixture in a nitrogen atmosphere and then heat it in an oil bath at 80℃~100℃ for 36h~48h.

[0018] S2: After the heating time is completed, remove the nitrogen atmosphere and allow the mixture to cool naturally to room temperature. Wash the mixture with oxacyclopentane to obtain a suspension. Filter the suspension using a filter membrane, referring to the particle size of the powder used. Vacuum dry the filtered powder to obtain thiol-modified magnesium hydroxysilicate composite particle powder A.

[0019] II: Modification with magnesium oxide particles

[0020] S3: Add the thiol-modified powder A to a dilute hydrochloric acid solution of a certain concentration, heat and keep warm, then add nano-sized magnesium oxide particles, stir evenly, and irradiate under ultraviolet light for 3-5 hours. After the reaction is completed, turn off the light source and stop heating. Let the reactants cool naturally to room temperature, centrifuge, and dry to obtain hydroxyl magnesium silicate nano lubricant additives.

[0021] More preferably, the vacuum drying conditions in step S2 are 20 kPa to 30 kPa and the time is 6 h to 8 h.

[0022] More preferably, the centrifugation speed in step S3 is 3500 rpm, the time is 30 min, the drying temperature is 60℃~70℃, and the duration is 5~6 h.

[0023] A hydroxyl magnesium silicate nano-lubricating oil additive prepared by any of the above preparation methods.

[0024] The above describes the application of a magnesium hydroxysilicate nano-lubricating oil additive in lubricating oil.

[0025] Preferably, the application includes the following steps:

[0026] The lubricating oil was mixed with a magnesium hydroxysilicate nano-lubricating oil additive; the mixed lubricating oil was sonicated for 30 min to 60 min to obtain a uniformly dispersed modified magnesium hydroxysilicate nano-lubricating oil.

[0027] Preferably, the mass ratio of the lubricating oil to the magnesium hydroxysilicate nano lubricating oil additive is 100:(1.0~2.0).

[0028] Preferably, the lubricating oil can be a common lubricating oil on the market, such as Mobil or Shell, or it can be a base oil.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] This invention utilizes the chemical properties of the thiol groups in long-chain thiols to organically modify the surface of magnesium hydroxysilicate composite materials. Furthermore, the introduction of magnesium atoms into the long-chain alkyl groups further enhances the material's adsorption capacity to the metal matrix, thereby improving its lubricating effect during friction. This modification method overcomes the problem of poor dispersion stability of magnesium hydroxysilicate composite materials in lubricating oil and also improves the utilization rate of the powder during friction, thus enabling its application as a lubricating additive in industrial lubrication. Attached Figure Description

[0031] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a comparison chart of the magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil of Example 1 of the present invention after standing for 0 days and 30 days.

[0033] Figure 2 This is a comparison chart of the friction coefficients between magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil and pure lubricating oil (Mobil) in Example 1 of the present invention.

[0034] Figure 3 This is a comparison chart of the magnesium hydroxysilicate / carbon nano lubricating oil of Example 2 of the present invention after standing for 0 days and 30 days.

[0035] Figure 4 This is a comparison chart of the friction coefficients of magnesium hydroxysilicate / carbon nano lubricating oil and pure lubricating oil (Shell) in Example 2 of the present invention.

[0036] Figure 5 This is a comparison chart of the magnesium / nickel hydroxysilicate nano lubricating oil of Example 3 of the present invention after standing for 0 days and 30 days.

[0037] Figure 6 This is a comparison chart of the friction coefficients of magnesium / nickel hydroxysilicate nano-lubricating oil and PAO6 base oil in Example 3 of the present invention.

[0038] Figure 7 This is a comparison chart of the unmodified magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil of Comparative Example 1 of the present invention after standing for 0 days and 30 days.

[0039] Figure 8 This is a comparison chart of the friction coefficients between the unmodified magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil and pure lubricating oil (Mobil) in Comparative Example 1 of this invention.

[0040] Figure 9 This is a comparison chart of the magnesium oxide-modified magnesium hydroxysilicate / carbon nano lubricating oil of Comparative Example 2 after standing for 0 days and 30 days.

[0041] Figure 10 This is a comparison chart of the friction coefficients of the magnesium oxide-modified magnesium hydroxysilicate / carbon nano lubricating oil and the pure lubricating oil (Shell) in Comparative Example 2 of this invention. Specific Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1

[0044] 2.0 g of magnesium hydroxysilicate / molybdenum disulfide nanopowder (prepared according to the method in patent application CN113502182A) was weighed and added to a beaker. Then, 4.0 g of 1 wt.% hexadecyl mercaptan solution was added dropwise to the magnesium hydroxysilicate / molybdenum disulfide powder. After the solution fully wetted the powder, the mixture was stirred evenly with a glass rod to obtain a mixture. The mixture was placed in a nitrogen atmosphere and then heated in an oil bath at 80°C for 48 h.

[0045] After the heating time was completed, the nitrogen atmosphere was removed, and the mixture was allowed to cool naturally to room temperature. The mixture was then washed with oxacyclopentane to obtain a suspension. The suspension was filtered using a membrane filter, referencing the particle size of the magnesium hydroxysilicate / molybdenum disulfide powder used. The filtered magnesium hydroxysilicate / molybdenum disulfide powder was then vacuum dried at 30 kPa for 6 hours. After drying, hexadecyl mercaptan-modified magnesium hydroxysilicate / molybdenum disulfide powder A was obtained.

[0046] Hexadecyl mercaptan-modified magnesium hydroxysilicate / molybdenum disulfide powder A was added to a 0.1 mol / L dilute hydrochloric acid solution, heated to 60°C, and kept at that temperature for 1 h. Then, 2.0 g of magnesium oxide particles with a particle size of 1–100 nm were added, stirred evenly, and irradiated under ultraviolet light with an intensity of 20,000 lx for 4 h. After the reaction was completed, the light source was turned off, heating was stopped, and the reactants were allowed to cool naturally to room temperature. After centrifugation for 30 min, the reactants were dried at 60°C for 5 h to obtain the finally modified magnesium hydroxysilicate / molybdenum disulfide powder B.

[0047] Use a pipette to pipette 100g of Mobil lubricating oil (10W-40) into a 250mL beaker, and weigh 1.0g of modified magnesium hydroxysilicate / molybdenum disulfide powder B using clean, uncontaminated weighing paper. Then pour the powder into the beaker containing Mobil lubricating oil, stir and mix, and then sonicate for 30min to obtain magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil.

[0048] Depend on Figure 1As can be seen, the magnesium hydroxysilicate / molybdenum disulfide nano-lubricating oil obtained in Example 1 of this invention did not show obvious stratification after standing for 30 days, only very shallow stratification, indicating that the magnesium hydroxysilicate / molybdenum disulfide powder, after modification by this invention, has excellent dispersion stability in lubricating oil. Simultaneously, the friction-reducing performance of the magnesium hydroxysilicate / molybdenum disulfide nano-lubricating oil obtained in this example was tested using a ball-and-disc friction and wear testing machine. The test load was 20 N, the frequency was 15 Hz, and the test time was 1 hour. Figure 2 It can be seen that the coefficient of friction of magnesium hydroxysilicate / molybdenum disulfide nano lubricant is significantly reduced compared with that of pure lubricating oil (Mobil).

[0049] Example 2

[0050] Weigh 3.0g of magnesium hydroxysilicate / carbon nanoparticles and add them to a beaker. Then, use a dropper to add 7.0g of 1wt.% octadecyl mercaptan solution to the magnesium hydroxysilicate / carbon nanoparticles. After the solution has fully wetted the powder, stir it evenly with a glass rod to obtain a mixture of the two. Place the mixture in a nitrogen atmosphere and then heat it in an oil bath at 90°C for 42 hours.

[0051] After the heating time was completed, the nitrogen atmosphere was removed, and the mixture was allowed to cool naturally to room temperature. The mixture was then washed with oxacyclopentane to obtain a suspension. The suspension was filtered using a filter membrane, referencing the particle size of the magnesium hydroxysilicate / carbon nanoparticles used. The filtered magnesium hydroxysilicate / carbon nanoparticles were then dried in a vacuum drying oven at 25 kPa for 8 hours. After drying, magnesium hydroxysilicate / carbon powder A modified with octadecyl mercaptan was obtained.

[0052] Octadecyl mercaptan-modified magnesium hydroxysilicate / carbon powder A was added to a 0.2 mol / L dilute hydrochloric acid solution, heated to 60°C, and kept at that temperature for 2 hours. Then, 5.0 g of magnesium oxide particles with a particle size of 1–100 nm were added, stirred evenly, and irradiated under ultraviolet light with an intensity of 20,000 lx for 5 hours. After the reaction was completed, the light source was turned off, heating was stopped, and the reactants were allowed to cool naturally to room temperature. After centrifugation for 30 minutes, the reactants were dried at 60°C for 5 hours to obtain the finally modified magnesium hydroxysilicate / carbon powder B.

[0053] Use a pipette to pipette 80g of Shell lubricating oil (10W-40) into a 250mL beaker, and weigh 1.0g of modified magnesium hydroxysilicate / carbon powder B using clean, uncontaminated weighing paper. Then pour the powder into the beaker containing the Shell lubricating oil, stir and mix, and then sonicate for 30min to obtain magnesium hydroxysilicate / carbon nano lubricating oil.

[0054] Depend on Figure 3As can be seen, the magnesium hydroxysilicate / carbon nano-lubricating oil obtained in Example 2 of this invention did not show obvious stratification after standing for 30 days, only very shallow stratification, indicating that the magnesium hydroxysilicate / carbon powder, after modification by this invention, has excellent dispersion stability in the lubricating oil. Simultaneously, the friction-reducing performance of the magnesium hydroxysilicate / carbon nano-lubricating oil obtained in this example was tested using a ball-and-disc friction and wear testing machine. The test load was 20 N, the frequency was 15 Hz, and the test time was 1 hour. Figure 4 It can be seen that the coefficient of friction of magnesium hydroxysilicate / carbon nano-lubricant is significantly lower than that of pure lubricant (Shell).

[0055] Example 3

[0056] Weigh 4.0 g of magnesium / nickel hydroxysilicate nanopowder and add it to a beaker. Then, use a dropper to add 8.0 g of 1 wt.% hexadecyl mercaptan solution to the magnesium / nickel hydroxysilicate nanopowder. After the solution has fully wetted the powder, stir it evenly with a glass rod to obtain a mixture of the two. Place the mixture in a nitrogen atmosphere and then heat it in an oil bath at 100°C for 36 h.

[0057] After the heating time was completed, the nitrogen atmosphere was removed, and the mixture was allowed to cool naturally to room temperature. The mixture was then rinsed with oxacyclopentane to form a suspension. The mixture was then filtered using a filter membrane, referencing the particle size of the magnesium / nickel hydroxysilicate nanoparticles used. The filtered magnesium / nickel hydroxysilicate nanoparticles were then dried in a vacuum drying oven at 20 kPa for 7 hours. After drying, hexadecyl mercaptan-modified magnesium / nickel hydroxysilicate nanoparticles A were obtained.

[0058] Hexadecyl mercaptan-modified magnesium / nickel hydroxysilicate nanopowder A was added to a 0.3 mol / L dilute hydrochloric acid solution, heated to 60°C, and kept at that temperature for 1 h. Then, 6.0 g of magnesium oxide particles with a particle size of 1–100 nm were added, stirred evenly, and irradiated under ultraviolet light with an intensity of 20,000 lx for 3 h. After the reaction was completed, the light source was turned off, heating was stopped, and the reactants were allowed to cool naturally to room temperature. After centrifugation for 30 min, the reactants were dried at 60°C for 5 h to obtain the finally modified magnesium / nickel hydroxysilicate nanopowder B.

[0059] Use a pipette to draw 100g of PAO6 base oil into a 250mL beaker, and weigh 2.0g of modified magnesium hydroxysilicate / nickel nanopowder B using clean, uncontaminated weighing paper. Then pour the powder into the beaker containing the PAO6 base oil, stir and mix, and then sonicate for 30min to obtain magnesium hydroxysilicate / nickel nano lubricating oil.

[0060] Depend on Figure 5As can be seen, the magnesium / nickel hydroxysilicate nano-lubricating oil obtained in Example 3 of this invention did not show obvious stratification after standing for 30 days, only very shallow stratification, indicating that the magnesium / nickel hydroxysilicate powder, after modification by this invention, has excellent dispersion stability in lubricating oil. Simultaneously, the friction-reducing performance of the magnesium / nickel hydroxysilicate nano-lubricating oil obtained in this example was tested using a ball-and-disc friction and wear testing machine. The test load was 20 N, the frequency was 15 Hz, and the test time was 1 hour. Figure 6 It can be seen that the friction coefficient of magnesium hydroxysilicate / nickel nano lubricant is significantly lower than that of PAO6 base oil.

[0061] Comparative Example 1:

[0062] To compare with Example 1, 100g of Mobil lubricating oil (10W-40) was pipetted into a 250mL beaker, and 1.0g of unmodified magnesium hydroxysilicate / molybdenum disulfide powder was weighed using clean, uncontaminated weighing paper. The powder was then poured into the beaker containing Mobil lubricating oil, stirred and mixed, and then sonicated for 30 minutes to obtain unmodified magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil.

[0063] Figure 7 The comparison images show the unmodified magnesium hydroxysilicate / molybdenum disulfide nano-lubricating oil obtained in Comparative Example 1 after standing for 0 days and 30 days. The comparison images show that after 30 days of standing, the lubricating oil exhibited significant stratification, with obvious agglomeration and sedimentation of the nanoparticles. This indicates that the dispersion stability of the unmodified magnesium hydroxysilicate / molybdenum disulfide nanoparticles directly added to the lubricating oil is very poor. Simultaneously, the friction-reducing performance of the unmodified magnesium hydroxysilicate / molybdenum disulfide nano-lubricating oil obtained in this comparative example was tested using a ball-and-disc friction and wear testing machine. The test load was 20 N, the frequency was 15 Hz, and the test time was 1 hour. Figure 8 It can be seen that, compared with the friction coefficient of pure Mobil lubricating oil, the friction coefficient of unmodified magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil is lower, but the distance between the two curves is closer than that in Example 1, and the curve shows a steep phenomenon. This indicates that the friction reduction effect of unmodified magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil is not as good as that of modified magnesium hydroxysilicate / molybdenum disulfide nano lubricating oil in Example 1.

[0064] Comparative Example 2:

[0065] To compare with Example 2, 80g of Shell lubricating oil (10W-40) was pipetted into a 250mL beaker, and 0.3g of magnesium hydroxysilicate / carbon powder and 0.5g of magnesium oxide nanopowder were weighed using clean, uncontaminated weighing paper and mixed together. The mixture was then poured into the beaker containing Shell lubricating oil and stirred. The mixture was then sonicated for 30min to obtain magnesium oxide modified magnesium hydroxysilicate / carbon nanopowder.

[0066] Figure 9 The comparison images show the magnesium oxide-modified magnesium hydroxysilicate / carbon nanoparticle lubricating oil obtained in Comparative Example 2 after standing for 0 days and 30 days. The comparison images show that after 30 days of standing, the lubricating oil exhibited significant stratification, with obvious agglomeration and sedimentation of the nanoparticles. This indicates that the dispersion stability of the magnesium oxide-modified magnesium hydroxysilicate / carbon nanoparticles directly added to the lubricating oil is very poor. Simultaneously, the friction-reducing performance of the magnesium oxide-modified magnesium hydroxysilicate / carbon nanoparticle lubricating oil obtained in this comparative example was tested using a ball-and-disc friction and wear testing machine. The test load was 20 N, the frequency was 15 Hz, and the test time was 1 hour. Figure 10 It can be seen that compared with the friction coefficient of pure Shell lubricating oil, the friction coefficient of magnesium oxide modified hydroxyl magnesium silicate / carbon nano lubricating oil is significantly reduced, and there is no steep curve, indicating that the magnesium oxide modified hydroxyl magnesium silicate / carbon nano lubricating oil has excellent friction reduction effect and stable friction process.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for preparing a magnesium hydroxysilicate nano-lubricating oil additive, characterized in that, Includes the following steps: (1) Mix the magnesium hydroxysilicate composite particles with a thiol solution evenly, and then heat them in an oil bath under a nitrogen atmosphere to obtain thiol-modified magnesium hydroxysilicate composite particles. (2) Thiol-modified magnesium hydroxysilicate composite particles were added to a dilute hydrochloric acid solution, heated and kept warm, magnesium oxide particles were added, stirred evenly, and then irradiated under ultraviolet light to obtain magnesium hydroxysilicate nano lubricant additives.

2. The method for preparing a magnesium hydroxysilicate nano-lubricating oil additive according to claim 1, characterized in that, The thiol mentioned in step (1) is a higher thiol.

3. The preparation method of a magnesium hydroxysilicate nano-lubricating oil additive according to claim 2, characterized in that, The thiol mentioned in step (1) is hexadecyl thiol or octadecyl thiol.

4. A method for preparing a magnesium hydroxysilicate nano-lubricating oil additive according to any one of claims 1-3, characterized in that, The magnesium hydroxysilicate composite particles in step (1) include one or more of magnesium hydroxysilicate / molybdenum disulfide composite particles, magnesium hydroxysilicate / nickel composite particles, and magnesium hydroxysilicate / carbon composite particles; the mass ratio of thiol to magnesium hydroxysilicate composite particles in the thiol solution in step (1) is (0.015~0.03):

1.

5. A method for preparing a magnesium hydroxysilicate nano-lubricating oil additive according to any one of claims 1-3, characterized in that, The oil bath heating temperature in step (1) is 80℃~100℃, and the heating time is 36h~48h.

6. A method for preparing a magnesium hydroxysilicate nano-lubricating oil additive according to any one of claims 1-3, characterized in that, The concentration of the dilute hydrochloric acid in step (2) is 0.1 mol / L to 0.3 mol / L. The heating and heat preservation are carried out by heating to 40℃ to 70℃ and then keeping it at that temperature for 1h to 3h. The irradiation time under ultraviolet light is 3h to 5h.

7. A method for preparing a magnesium hydroxysilicate nano-lubricating oil additive according to any one of claims 1-3, characterized in that, The magnesium oxide particles in step (2) have a particle size of 1~100nm, and the mass ratio of the magnesium oxide particles to the magnesium hydroxysilicate composite particles is 1~2:

1.

8. A magnesium hydroxysilicate nano-lubricating oil additive prepared by the preparation method according to any one of claims 1-7.

9. The application of the magnesium hydroxysilicate nano-lubricating oil additive as described in claim 8 in lubricating oil.

10. The application of the magnesium hydroxysilicate nano-lubricating oil additive according to claim 9 in lubricating oil, characterized in that, The mass ratio of the lubricating oil to the magnesium hydroxysilicate nano-lubricating oil additive is 100:(1.0~2.0).

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