High-performance engine lubricating oil and preparation method thereof

Abstract

The invention relates to the field of lubricating oil, in particular to high-performance engine lubricating oil and a preparation method thereof. The lubricating oil comprises the following components in parts by mass: 100 parts of base oil, 5-10 parts of a viscosity improver, 3-10 parts of a clearing agent, 1-5 parts of a dispersing agent, 0.5-3 parts of an oxidation and corrosion inhibitor, 0.5-3 parts of a Cu-benzene tricarboxylic acid modified boron nitride nanotube and 0.5-3 parts of a DMF-MoS2 nano material. According to the invention, boron nitride nanotubes and MoS2 are properly improved, and Cu-benzene tricarboxylic acid modified boron nitride nanotubes and a DMF-MoS2 nano material are selected to be compounded for use, so that compared with DMF prepared from H2O, methanol, ethanol and other solvents, the lubricating oil has a better lubricating effect.

Description

Technical Field

[0001] The present invention relates to the field of lubricating oils, and in particular to a high-performance engine lubricating oil and a preparation method thereof. Background Art

[0002] With advances in engine technology, the operating environments of engines in specific scenarios are becoming increasingly demanding, placing correspondingly stricter demands on the temperature resistance of lubricants. In some extreme environments, lubricants may face temperatures as high as 204°C; in extreme cases, lubricants may even withstand temperatures as high as 288°C.

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

[0004] In order to solve the above technical problems, the present invention provides a high-performance engine lubricating oil and a preparation method thereof.

[0005] The present invention is achieved through the following technical solutions:

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

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

[0008] Furthermore, the base oil is selected from adipate.

[0009] Furthermore, the detergent is selected from magnesium naphthenate. The detergent can also be selected from one or a combination of two or more of low-base synthetic calcium sulfonate, medium-base synthetic calcium sulfonate, high-base synthetic calcium sulfonate, and / or sulfur-phosphorized polyisobutylene barium salt.

[0010] Furthermore, the viscosity improver is selected from polyvinyl n-butyl ether. The viscosity improver can also be selected from one or a combination of two or more of ethylene-propylene copolymer and / or polymethacrylate and / or polyisooctyl acrylate.

[0011] Furthermore, the dispersant is selected from bis-alkenyl succinimide, and may also be selected from one or a combination of two or more of polyalkenyl succinimide and / or high molecular weight succinimide.

[0012] Furthermore, the antioxidant and anticorrosive agent is selected from dioctyl thiophosphate basic zinc salt, and can also be selected from one or a combination of two or more of thiophosphate primary and secondary alcohol zinc salts and / or thiophosphate secondary alcohol zinc salts.

[0013] Furthermore, the preparation method of the Cu-benzenetricarboxylic acid modified boron nitride nanotubes is as follows: Cu(NO3)2·3H2O and 1,3,5-benzenetricarboxylic acid are added to 12mL DMF, 12mL ethanol and 8mL deionized water to form a mixed solution, stirred for 10 minutes, and then 0.1g boron nitride carbon nanotubes are added, ultrasonicated for 1 hour, and then the mixed solution is heated to 80°C and maintained for 24 hours. After cooling, centrifugation, the precipitate is washed several times with deionized water, and then dried at 60°C for 12 hours to obtain Cu-benzenetricarboxylic acid modified boron nitride nanotubes.

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

[0015] MoO3 and KSCN were dissolved in deionized water and stirred for 6 h, and then the mixed solution was heated to 240 °C and maintained for 24 h, and then naturally cooled to room temperature. The precipitate was filtered and then washed with methanol and deionized water three times, respectively, and then dried at 60 °C;

[0016] The dried product was dissolved in DMF, ultrasonicated for 1 h, then heated to 200 °C for 12 h, naturally cooled to room temperature, filtered to obtain a precipitate, and then washed with methanol and deionized water three times respectively, and then dried at 60 °C for 12 h 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 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] The present invention makes appropriate improvements to boron nitride nanotubes and MoS2, selects Cu-benzenetricarboxylic acid modified boron nitride nanotubes and DMF-MoS2 nanomaterials for compound use, and has better lubrication effect than DMF prepared from solvents such as H2O, methanol and ethanol. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with examples. The illustrative embodiments of the present invention and their descriptions are only used to explain the present invention and are not intended to limit the present invention.

[0022] The boron nitride carbon nanotubes in the present invention were purchased from Sigma-Aldrich, with a particle size distribution of 30 to 50 nm, in the form of powder. The remaining reagents were also purchased from commercial products.

[0023] Example 1

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

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

[0026] 1mMCu(NO3)2·3H2O and 0.67mM 1,3,5-benzenetricarboxylic acid were 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 were added, ultrasonicated for 1h, and then the mixed solution was heated to 80℃ and maintained for 24h. After cooling, centrifugation was performed, and the precipitate was washed several times with deionized water and then dried at 60℃ for 12h to obtain Cu-benzenetricarboxylic acid modified boron nitride nanotubes. Figure 1 This is the SEM image of Cu-benzenetricarboxylic acid modified boron nitride nanotubes.

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

[0028] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL deionized water and stirred for 6 h. The mixed solution was then heated to 240 °C and maintained for 24 h. It was then naturally cooled to room temperature and filtered to obtain a precipitate. The precipitate was then washed three times with methanol and deionized water, respectively, and then dried at 60 °C.

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

[0030] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0031] Example 2

[0032] A high-performance engine lubricant comprises the following components by mass: 100 parts of adipic acid ester, 5 parts of polyvinyl n-butyl ether, 5 parts of magnesium cyclohexane, 2 parts of diene succinimide, 1.5 parts of dioctyl basic zinc salt of thiophosphorus, 1 part of Cu-benzenetricarboxylic acid modified boron nitride nanotubes, and 1 part of DMF-MoS2 nanomaterial.

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

[0034] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0035] Example 3

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

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

[0038] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0039] Example 4

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

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

[0042] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0043] Example 5

[0044] A high-performance engine lubricant comprises the following components by mass: 100 parts of adipic acid ester, 10 parts of polyvinyl n-butyl ether, 10 parts of magnesium cyclohexane, 5 parts of diene succinimide, 3 parts of dioctyl basic zinc salt of thiophosphorus, 3 parts of Cu-benzenetricarboxylic acid modified boron nitride nanotubes, and 3 parts of DMF-MoS2 nanomaterial.

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

[0046] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0047] Comparative Example 1

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

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

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

[0051] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL deionized water and stirred for 6 h. The mixed solution was then heated to 240 °C and maintained for 24 h. It was then naturally cooled to room temperature and filtered to obtain a precipitate. The precipitate was then washed three times with methanol and deionized water, respectively, and then dried at 60 °C.

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

[0053] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0054] Comparative Example 2

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

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

[0057] The preparation method of methanol-MoS2 nanomaterial is:

[0058] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL deionized water and stirred for 6 h. The mixed solution was then heated to 240 °C and maintained for 24 h. It was then naturally cooled to room temperature and filtered to obtain a precipitate. The precipitate was then washed three times with methanol and deionized water, respectively, and then dried at 60 °C.

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

[0060] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0061] Comparative Example 3

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

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

[0064] The preparation method of ethanol-MoS2 nanomaterial is:

[0065] 0.4318 g MoO3 and 0.8746 g KSCN were dissolved in 80 mL deionized water and stirred for 6 h. The mixed solution was then heated to 240 °C and maintained for 24 h. It was then naturally cooled to room temperature and filtered to obtain a precipitate. The precipitate was then washed three times with methanol and deionized water, respectively, and then dried at 60 °C.

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

[0067] A method for preparing high-performance engine lubricating oil comprises the following steps: first adding adipic acid ester, then stirring at room temperature, slowly adding other substances, and then stirring for 30 minutes to obtain the lubricating oil.

[0068] Test Example 1

[0069] A ball-on-disc friction tester was used, using GCr15 bearing steel balls and a TC4 titanium alloy disc. Friction parameters were: load 8N, rotation speed 150 rpm, and rotation diameter 4mm. The ball and disc were cleaned before the experiment to ensure a smooth surface. After the sample was installed, the lubricating oil prepared in each of the Examples and Comparative Examples was dripped onto the TC4 disc. After 30 minutes of testing, the test was terminated and the average friction coefficient was recorded.

[0070] Table 1 Friction performance test

[0071]

[0072]

[0073] As can be seen from the data in Table 1, the combination of Cu-benzenetricarboxylic acid-modified boron nitride nanotubes and MoS2 prepared by different methods all exhibited a certain lubricating effect. The best results were achieved when the DMF-MoS2 nanomaterial prepared in DMF solvent was combined with Cu-benzenetricarboxylic acid-modified boron nitride nanotubes. The MoS2 nanomaterial prepared in H2O, methanol, and ethanol solvents were less effective when combined with Cu-benzenetricarboxylic acid-modified boron nitride nanotubes.

[0074] Test Example 2

[0075] The liquid phase corrosion test (24 h) was carried out according to 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 exhibit good anti-corrosion performance.

[0079] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method 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 in the scope of protection of the present invention.

Claims

1. A high performance engine lubricant, characterized in that: The composition includes the following components in parts by mass: 100 parts of base oil, 5-10 parts of viscosity improver, 3-10 parts of detergent, 1-5 parts of dispersant, 0.5-3 parts of antioxidant and anti-corrosion agent, 0.5-3 parts of Cu-benzenetricarboxylic acid modified boron nitride nanotubes and 0.5-3 parts of DMF-MoS2 nanomaterial.

2. A high performance engine lubricant as claimed in claim 1, characterized in that: The base oil is selected from one or more of adipate, trimethylolpropane ester or pentaerythritol ester.

3. A high performance engine lubricant as claimed in claim 2, characterized in that: The base oil is selected from adipate.

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

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

6. A high performance engine lubricant as claimed in claim 1, characterized in that: The dispersant is selected from bis-alkenyl succinimide.

7. A high performance engine lubricant as claimed in claim 1, characterized in that: The antioxidant and anti-corrosion agent is selected from dioctyl alkaline zinc salt of thiophosphate.

8. A high performance engine lubricant as claimed in claim 1, characterized in that: The preparation method of the Cu-benzenetricarboxylic acid modified boron nitride nanotubes is as follows: Cu(NO3)2·3H2O and 3,5-benzenetricarboxylic acid are added to 12 mL of DMF, 12 mL of ethanol and 8 mL of deionized water to form a mixed solution, stirred for 10 minutes, then 0.1 g of boron nitride carbon nanotubes are added, ultrasonicated for 1 hour, and then the mixed solution is heated to 80°C and maintained for 24 hours. After cooling, centrifugation is performed, and the precipitate is washed several times with deionized water and then dried at 60°C for 12 hours to obtain Cu-benzenetricarboxylic acid modified boron nitride nanotubes.

9. A high performance engine lubricant as claimed in claim 1, characterized in that: The preparation method of the DMF-MoS2 nanomaterial is: MoO3 and KSCN were dissolved in deionized water and stirred for 6 h, and then the mixed solution was heated to 240 °C and maintained for 24 h, and then naturally cooled to room temperature. The precipitate was filtered and then washed with methanol and deionized water three times, respectively, and then dried at 60 °C; The dried product was dissolved in DMF, ultrasonicated for 1 h, then heated to 200 °C for 12 h, naturally cooled to room temperature, filtered to obtain a precipitate, and then washed with methanol and deionized water three times respectively, and then dried at 60 °C for 12 h to obtain DMF-MoS2 nanomaterials.

10. A method for preparing high-performance engine lubricating oil, the composition of which is as described in any one of claims 1 to 9, characterized in that: First add the base oil, then stir at room temperature, slowly add the remaining substances, and stir for another 30 minutes.

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