A high-performance engine lubricating oil and its preparation method

Abstract

This invention relates to the field of lubricating oils, and more particularly to a high-performance engine lubricating oil and its preparation method. It comprises the following components by weight: 100 parts base oil, 5-10 parts viscosity modifier, 3-10 parts detergent, 1-5 parts dispersant, 0.5-3 parts antioxidant and anti-corrosion agent, 0.5-3 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 0.5-3 parts DMF-MoS2 nanomaterials. This invention, through appropriate modifications to boron nitride nanotubes and MoS2, selects Cu-tricarboxylic acid modified boron nitride nanotubes and DMF-MoS2 nanomaterials for compound use, resulting in better lubrication performance compared to DMF prepared using solvents such as H2O, methanol, and ethanol.

Description

Technical Field

[0001] This invention relates to the field of lubricating oils, and more particularly to a high-performance engine lubricating oil and its preparation method. Background Technology

[0002] With advancements in engine technology, the operating environment of engines is becoming increasingly demanding in specific usage scenarios, which correspondingly places stricter requirements on the temperature resistance of lubricating oils. In some extreme environments, lubricating oils may face temperatures as high as 204 degrees Celsius; in extreme cases, lubricating oils may even withstand extreme temperatures as high as 288 degrees Celsius.

[0003] Therefore, the base oils commonly used in high-performance engine lubricants are adipate esters, trimethylolpropane esters, or pentaerythritol esters. These base oils do not possess good rust-preventive properties, and in high-salt, high-humidity environments during marine operations, they exacerbate the corrosion of engine metal components. Therefore, there is a need to develop a high-performance engine lubricant with excellent rust-preventive properties. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a high-performance engine lubricating oil and its preparation method.

[0005] This invention is achieved through the following technical solution:

[0006] A high-performance engine lubricant comprises the following components by weight: 100 parts base oil, 5-10 parts viscosity modifier, 3-10 parts detergent, 1-5 parts dispersant, 0.5-3 parts antioxidant and anti-corrosion agent, 0.5-3 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 0.5-3 parts DMF-MoS2 nanomaterials.

[0007] Furthermore, the base oil is selected from one or more of diacetate, trimethylolpropane ester, or pentaerythritol ester.

[0008] Furthermore, the base oil is selected as an ester.

[0009] Furthermore, the detergent is selected from magnesium naphthenate. The detergent may also be selected from one or more combinations of low-base-value synthetic calcium sulfonate and / or medium-base-value synthetic calcium sulfonate and / or high-base-value synthetic calcium sulfonate and / or barium thiophosphate polyisobutylene.

[0010] Furthermore, the viscosity modifier is selected from polyvinyl n-butyl ether. The viscosity modifier may also be selected from one or more combinations of ethylene-propylene copolymer and / or polymethacrylate and / or polyisooctyl acrylate.

[0011] Furthermore, the dispersant is selected from diene succinimide, and may also be selected from one or more combinations of polyene succinimide and / or high molecular weight succinimide.

[0012] Furthermore, the antioxidant and anticorrosive agent is selected from thiophosphoric dioctyl basic zinc salt, and may also be selected from one or more combinations of thiophosphoric primary and secondary alcoholic zinc salts and / or thiophosphoric secondary alcoholic zinc salts.

[0013] Further, the preparation method of Cu-tricarboxylic acid modified boron nitride nanotubes is as follows: Cu(NO3)2·3H2O and 1,3,5-tricarboxylic acid are added to 12mL DMF, 12mL ethanol and 8mL deionized water to form a mixed solution, stirred for 10min, then 0.1g boron nitride carbon nanotubes are added, sonicated for 1h, then the mixed solution is heated to 80℃ and maintained for 24h, cooled, centrifuged, the precipitate is washed several times with deionized water, and then dried at 60℃ for 12h to obtain Cu-tricarboxylic acid modified boron nitride nanotubes.

[0014] Furthermore, the preparation method of the DMF-MoS2 nanomaterial is as follows:

[0015] MoO3 and KSCN were dissolved in deionized water and stirred for 6 hours. The mixed solution was then heated to 240°C and maintained for 24 hours. After cooling naturally to room temperature, the precipitate was obtained by filtration. The precipitate was then washed three times with methanol and deionized water, and then dried at 60°C.

[0016] The dried product was dissolved in DMF, sonicated for 1 hour, then heated to 200℃ and reacted for 12 hours. After naturally cooling to room temperature, the precipitate was obtained by filtration. The precipitate was then washed three times with methanol and deionized water, and then dried at 60℃ for 12 hours to obtain DMF-MoS2 nanomaterials.

[0017] Furthermore, the present invention also provides a method for preparing high-performance engine lubricating oil: first add base oil, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] This invention, through appropriate modifications to boron nitride nanotubes and MoS2, selects Cu-tricarboxylic acid-modified boron nitride nanotubes and DMF-MoS2 nanomaterials for compound use, which has better lubrication effect than DMF prepared by solvents such as H2O, methanol and ethanol. Attached Figure Description

[0020] Figure 1 This is a SEM image of the Cu-benzenetricarboxylic acid modified boron nitride nanotubes in Example 1 of this invention. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments. The illustrative embodiments and descriptions of this invention are only used to explain this invention and are not intended to limit this invention.

[0022] In this invention, the boron nitride carbon nanotubes were purchased from Sigma-Aldrich, with a particle size distribution of 30–50 nm, and were in powder form. All other reagents were also purchased from commercially available products.

[0023] Example 1

[0024] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 5 parts polyvinyl n-butyl ether, 3 parts magnesium naphthenate, 1 part diene succinimide, 0.5 parts thiophosphoric dioctyl basic zinc salt, 0.5 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 0.5 parts DMF-MoS2 nanomaterials.

[0025] The preparation method of Cu-benzoic acid modified boron nitride nanotubes is as follows:

[0026] 1 mM Cu(NO3)2·3H2O and 0.67 mM 1,3,5-benzenetricarboxylic acid were added to 12 mL DMF, 12 mL ethanol, and 8 mL deionized water to form a mixed solution. The mixture was stirred for 10 min, then 0.1 g boron nitride carbon nanotubes were added, and the mixture was sonicated for 1 h. The mixed solution was then heated to 80 °C and maintained for 24 h. After cooling, the solution was centrifuged, and the precipitate was washed several times with deionized water and then dried at 60 °C for 12 h to obtain Cu-benzenetricarboxylic acid modified boron nitride nanotubes. Figure 1 SEM image of Cu-benzenetricarboxylic acid modified boron nitride nanotubes.

[0027] The preparation method of DMF-MoS2 nanomaterials is as follows:

[0028] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL of deionized water and stirred for 6 h. The mixture was then heated to 240 °C and maintained for 24 h. After cooling to room temperature, the precipitate was obtained by filtration and washed three times with methanol and deionized water, respectively. The precipitate was then dried at 60 °C.

[0029] Take 0.05g of the dried product, dissolve it in 50ml of DMF, sonicate for 1h, then heat to 200℃ and react for 12h. After naturally cooling to room temperature, filter to obtain the precipitate, then wash it three times with methanol and deionized water respectively, and then dry it at 60℃ for 12h to obtain DMF-MoS2 nanomaterials.

[0030] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0031] Example 2

[0032] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 5 parts polyvinyl n-butyl ether, 5 parts magnesium naphthenate, 2 parts diene succinimide, 1.5 parts thiophosphoric dioctyl basic zinc salt, 1 part Cu-tricarboxylic acid modified boron nitride nanotubes, and 1 part DMF-MoS2 nanomaterials.

[0033] The preparation methods of Cu-benzenetricarboxylic acid modified boron nitride nanotubes and DMF-MoS2 nanomaterials are the same as in Example 1.

[0034] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0035] Example 3

[0036] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 7 parts polyvinyl n-butyl ether, 7 parts magnesium naphthenate, 3 parts diene succinimide, 2 parts thiophosphoric dioctyl basic zinc salt, 1.5 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 1.5 parts DMF-MoS2 nanomaterials.

[0037] The preparation methods of Cu-benzenetricarboxylic acid modified boron nitride nanotubes and DMF-MoS2 nanomaterials are the same as in Example 1.

[0038] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0039] Example 4

[0040] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 8 parts polyvinyl n-butyl ether, 8 parts magnesium naphthenate, 4 parts diene succinimide, 2.5 parts thiophosphoric dioctyl basic zinc salt, 2 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 2 parts DMF-MoS2 nanomaterials.

[0041] The preparation methods of Cu-benzenetricarboxylic acid modified boron nitride nanotubes and DMF-MoS2 nanomaterials are the same as in Example 1.

[0042] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0043] Example 5

[0044] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 10 parts polyvinyl n-butyl ether, 10 parts magnesium naphthenate, 5 parts diene succinimide, 3 parts thiophosphoric dioctyl basic zinc salt, 3 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 3 parts DMF-MoS2 nanomaterials.

[0045] The preparation methods of Cu-benzenetricarboxylic acid modified boron nitride nanotubes and DMF-MoS2 nanomaterials are the same as in Example 1.

[0046] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0047] Comparative Example 1

[0048] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 7 parts polyvinyl n-butyl ether, 7 parts magnesium naphthenate, 3 parts diene succinimide, 2 parts thiophosphoric dioctyl basic zinc salt, 1.5 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 1.5 parts H2O-MoS2 nanomaterials.

[0049] The preparation method of Cu-benzenetricarboxylic acid modified boron nitride nanotubes is the same as in Example 1.

[0050] The preparation method of H2O-MoS2 nanomaterials is as follows:

[0051] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL of deionized water and stirred for 6 h. The mixture was then heated to 240 °C and maintained for 24 h. After cooling to room temperature, the precipitate was obtained by filtration and washed three times with methanol and deionized water, respectively. The precipitate was then dried at 60 °C.

[0052] Take 0.05g of the dried product, dissolve it in 50mL of deionized water, sonicate for 1h, then heat to 200℃ and react for 12h, cool naturally to room temperature, filter to obtain the precipitate, then wash it three times with methanol and deionized water respectively, and then dry it at 60℃ for 12h to obtain H2O-MoS2 nanomaterials.

[0053] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0054] Comparative Example 2

[0055] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 7 parts polyvinyl n-butyl ether, 7 parts magnesium naphthenate, 3 parts diene succinimide, 2 parts thiophosphoric dioctyl basic zinc salt, 1.5 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 1.5 parts H2O-MoS2 nanomaterials.

[0056] The preparation method of Cu-benzenetricarboxylic acid modified boron nitride nanotubes is the same as in Example 1.

[0057] The preparation method of methanol-MoS2 nanomaterials is as follows:

[0058] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL of deionized water and stirred for 6 h. The mixture was then heated to 240 °C and maintained for 24 h. After cooling to room temperature, the precipitate was obtained by filtration and washed three times with methanol and deionized water, respectively. The precipitate was then dried at 60 °C.

[0059] Take 0.05g of the dried product, dissolve it in 50mL of methanol, sonicate for 1h, then heat to 200℃ and react for 12h, cool naturally to room temperature, filter to obtain the precipitate, then wash it three times with methanol and deionized water respectively, and then dry it at 60℃ for 12h to obtain H2O-MoS2 nanomaterials.

[0060] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0061] Comparative Example 3

[0062] A high-performance engine lubricant comprises the following components by mass fraction: 100 parts adipate, 7 parts polyvinyl n-butyl ether, 7 parts magnesium naphthenate, 3 parts diene succinimide, 2 parts thiophosphoric dioctyl basic zinc salt, 1.5 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 1.5 parts H2O-MoS2 nanomaterials.

[0063] The preparation method of Cu-benzenetricarboxylic acid modified boron nitride nanotubes is the same as in Example 1.

[0064] The preparation method of ethanol-MoS2 nanomaterials is as follows:

[0065] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL of deionized water and stirred for 6 h. The mixture was then heated to 240 °C and maintained for 24 h. After cooling to room temperature, the precipitate was obtained by filtration and washed three times with methanol and deionized water, respectively. The precipitate was then dried at 60 °C.

[0066] Take 0.05g of the dried product, dissolve it in 50mL of ethanol, sonicate for 1h, then heat to 200℃ and react for 12h, cool naturally to room temperature, filter to obtain the precipitate, then wash it three times with methanol and deionized water respectively, and then dry it at 60℃ for 12h to obtain H2O-MoS2 nanomaterials.

[0067] A method for preparing a high-performance engine lubricating oil is as follows: first add adipate ester, then stir at room temperature, slowly add the remaining substances, and then stir for 30 minutes to obtain the product.

[0068] Test Example 1

[0069] A ball-and-disc friction testing machine was used, with GCr15 bearing steel balls and a TC4 titanium alloy disc. The friction parameters were: load 8 N, rotation speed 150 rpm, and rotation diameter 4 mm. Before the experiment, the balls and disc were cleaned to ensure a smooth surface. After the sample was mounted, the lubricating oil prepared in the various examples and comparative examples was added to the TC4 disc. The test was stopped after 30 minutes, and the average coefficient of friction was recorded.

[0070] Table 1 Friction performance test

[0071]

[0072]

[0073] As shown in Table 1, both Cu-tricarboxylic acid-modified boron nitride nanotubes and MoS2 prepared by different methods exhibit certain lubricating effects when used in combination. The best results were observed when DMF-MoS2 nanomaterials prepared with DMF solvent were combined with Cu-tricarboxylic acid-modified boron nitride nanotubes. The effects were relatively poor when MoS2 nanomaterials prepared with H2O, methanol, and ethanol as solvents were combined with Cu-tricarboxylic acid-modified boron nitride nanotubes.

[0074] Test Example 2

[0075] The liquid phase corrosion test (24h) was conducted in accordance with GB / T 11143. The results are shown in Table 2.

[0076] Table 2 Liquid Phase Corrosion Test

[0077] Liquid phase corrosion test (24h) Example 1 Rust-free Example 2 Rust-free Example 3 Rust-free Example 4 Rust-free Example 5 Rust-free Comparative Example 1 Rust-free Comparative Example 2 Rust-free Comparative Example 3 Rust-free

[0078] As can be seen from Table 2, both the examples and the comparative examples exhibited good anti-rust performance.

[0079] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-performance engine lubricant, characterized in that, The composition by weight is as follows: 100 parts base oil, 5-10 parts viscosity modifier, 3-10 parts detergent, 1-5 parts dispersant, 0.5-3 parts antioxidant and anticorrosive agent, 0.5-3 parts Cu-tricarboxylic acid modified boron nitride nanotubes, and 0.5-3 parts DMF-MoS2 nanomaterials; The Cu-benzotricarboxylic acid modified boron nitride nanotubes were prepared by the following method: Cu(NO3)2·3H2O and 1,3,5-benzotricarboxylic acid were added to 12 mL of LDM, 12 mL of ethanol and 8 mL of deionized water to form a mixed solution. The mixture was stirred for 10 min, and then 0.1 g of boron nitride nanotubes were added. The mixture was sonicated for 1 h, and then the mixed solution was heated to 80 °C and maintained for 24 h. After cooling, the mixture was centrifuged, and the precipitate was washed several times with deionized water. Then it was dried at 60 °C for 12 h to obtain Cu-benzotricarboxylic acid modified boron nitride nanotubes. The DMF-MoS2 nanomaterials were prepared by the following method: MoO3 and KSCN were dissolved in deionized water and stirred for 6 h. The mixed solution was then heated to 240 °C and maintained for 24 h. After naturally cooling to room temperature, the precipitate was obtained by filtration. The precipitate was then washed three times with methanol and deionized water, and then dried at 60 °C. The dried product was taken, dissolved in DMF, sonicated for 1 h, and then heated to 200 °C for 12 h. After naturally cooling to room temperature, the precipitate was obtained by filtration. The precipitate was then washed three times with methanol and deionized water, and then dried at 60 °C for 12 h to obtain the DMF-MoS2 nanomaterials.

2. The high-performance engine lubricant as described in claim 1, characterized in that, The base oil is selected from one or more of the following: acetic acid ester, trimethylolpropane ester, or pentaerythritol ester.

3. The high-performance engine lubricant as described in claim 2, characterized in that, The base oil is selected from diesters.

4. The high-performance engine lubricant as described in claim 1, characterized in that, The detergent is selected from magnesium naphthenate.

5. The high-performance engine lubricant as described in claim 1, characterized in that, The viscosity improver is selected from polyvinyl n-butyl ether.

6. The high-performance engine lubricant as described in claim 1, characterized in that, The dispersant is selected from diene succinimide.

7. The high-performance engine lubricant as described in claim 1, characterized in that, The antioxidant and anti-corrosion agent is selected from thiophosphoric dioctyl basic zinc salt.

8. A method for preparing a high-performance engine lubricating oil, the composition of which is as described in any one of claims 1 to 7, characterized in that, First add the base oil, then stir at room temperature. Slowly add the remaining substances and stir for another 30 minutes to obtain the final product.

Images