Graphene transmission oil and preparation method thereof

Abstract

The invention relates to the technical field of transmission oil, and particularly discloses graphene transmission oil and a preparation method thereof. The graphene transmission oil provided by the invention is prepared from the following components in parts by weight: 1 to 3 parts of micelle graphene, 20 to 30 parts of an anti-wear agent, 1 to 8 parts of an anti-gum agent, 5 to 10 parts of an anti-rust agent and 950 to 1000 parts of base oil, the preparation method of the micelle graphene comprises the following steps: firstly, dissolving succinimide in diester to obtain a premixed solution; then adding graphene into the premixed solution, stirring, ultrasonically dispersing and standing to obtain micelle graphene; the invention further provides a preparation method of the graphene transmission oil. According to the graphene transmission oil provided by the invention, the friction coefficient of a transmission gear can be reduced, the non-seizure load and the sintering load are improved, and the transmission efficiency of a whole vehicle is improved under the condition of ensuring that a vehicle transmission is not abraded and sintered.

Description

Technical Field

[0001] The present application relates to the technical field of transmission oil, and in particular to a graphene transmission oil and a preparation method thereof. Background Art

[0002] Transmission efficiency is one of the important technical indicators of the gearbox assembly. It not only affects the fuel economy and power performance of the vehicle, but also the overall reliability and service life of the vehicle. In recent years, with the continuous development of the automotive industry and technological progress, gearbox technology has also been constantly innovating. Especially in the context of the rapid development of new energy vehicles, the requirements for gearbox transmission efficiency are getting higher and higher. All OEMs and parts companies have increased their R&D investment and are committed to improving the transmission efficiency of gearboxes through various technologies and means to meet market demand and regulatory requirements.

[0003] In order to improve the transmission efficiency of the gearbox, the methods currently commonly used in the industry include multi-gear design, lightweight technology, use of electronic oil pumps, motor-driven gear shifting, optimization of hydraulic systems, selection of low-viscosity lubricants, improvement of cooling and lubrication systems, application of temperature-compensated bearings, use of low rolling resistance oil seals, and refined gear shifting strategies. These methods can effectively improve the transmission efficiency of the gearbox, reduce energy loss, and improve the energy efficiency of the vehicle to a certain extent; however, with the rapid development of new energy vehicles, although the energy efficiency of the vehicle has been significantly improved, the proportion of the gearbox in the efficiency loss of the vehicle has also increased significantly.

[0004] Therefore, developing a transmission oil that can improve the transmission efficiency of the transmission is of great significance to improving the overall energy utilization efficiency of the vehicle. Summary of the invention

[0005] In order to further improve the transmission efficiency of the gearbox and thus improve the energy utilization rate of the entire vehicle, the present application provides a graphene gearbox oil and a preparation method thereof.

[0006] In the first aspect, the present application provides a graphene gearbox oil, which adopts the following technical solution: A graphene gearbox oil comprises the following components in parts by weight: 1-3 parts of micellar graphene, 20-30 parts of anti-wear agent, 1-8 parts of anti-gelling agent, 5-10 parts of rust inhibitor and 950-1000 parts of base oil.

[0007] The present application uses micellar graphene, anti-wear agents and base oil to prepare a graphene transmission oil, which can significantly reduce the friction coefficient of the transmission gears, increase the non-seizure load and sintering load, thereby ensuring that the vehicle transmission is not subject to wear and sintering, and greatly improves the transmission efficiency of the entire vehicle. Specifically, micellar graphene can be evenly suspended in the transmission oil in a micellar state. When boundary friction occurs at the transmission gears, the high temperature will destroy the micellar state of the micellar graphene surface, thereby releasing the graphene sheets; under high temperature conditions on the metal surface, the graphene sheets will be obliquely embedded in the metal surface to form a graphene protective film, thereby protecting the metal surface from wear, while rapidly reducing the friction surface temperature, protecting the lubricating oil from high-temperature oxidation, thereby greatly reducing friction power loss and improving the transmission efficiency of the transmission.

[0008] Optionally, the following components are included in parts by weight: 1.5-2.5 parts of micellar graphene, 20-30 parts of anti-wear agent, 1-8 parts of anti-gel agent, 5-10 parts of rust inhibitor and 950-1000 parts of base oil.

[0009] In some embodiments, the weight proportion of the micellar graphene may be 1-1.5, 1-2, 1-2.5, 1-3, 1.5-2, 1.5-2.5, 1.5-3, 2-2.5, 2-3 or 2.5-3.

[0010] In a specific embodiment, the weight proportion of the micellar graphene can also be 1 part, 1.5 parts, 2 parts, 2.5 parts or 3 parts.

[0011] Optionally, the method for preparing micellar graphene comprises the following steps: firstly dissolving butyrimide in diester to obtain a premixed solution; then adding graphene to the premixed solution, stirring, ultrasonically dispersing, and standing to obtain micellar graphene; The weight ratio of the butyrimide to the diester is 1:(2-3), and the weight ratio of the butyrimide to the graphene is 1:(1.3-1.8).

[0012] In some embodiments, the weight ratio of the butyrimide to the diester may be 1:(2-2.5) or 1:(2.5-3).

[0013] In a specific embodiment, the weight ratio of the butyrimide to the diester can also be 1:2, 1:2.5 or 1:3.

[0014] In some embodiments, the weight ratio of butyrimide to graphene may be 1:(1.3-1.5) or 1:(1.5-1.8).

[0015] In a specific embodiment, the weight ratio of butyrimide to graphene can also be 1:1.3, 1:1.5 or 1:1.8.

[0016] Optionally, the diester is PANESTER 8273.

[0017] Optionally, the stirring speed is 90-150 r / min, and the time is 30-40 min; the power of ultrasonic dispersion is 20-25 kHz, and the time is 10-15 min.

[0018] Optionally, the number of graphene sheets is 3-5 layers, and the width is 50-100 nm.

[0019] Optionally, the anti-wear agent is selected from one or more of aminothioester and triphenyl thiophosphate; the anti-gelling agent is nonyl-N-(nonylphenyl) aniline; the anti-rust agent is dodecenyl succinic acid half ester; and the base oil is diester PANESTER 8223.

[0020] In a second aspect, the present application provides a method for preparing graphene transmission oil.

[0021] A method for preparing a graphene transmission oil comprises the following steps: firstly, heating a base oil to 50-70°C; then sequentially adding a rust inhibitor, an anti-wear agent, an anti-gelling agent and micellar graphene to the base oil, and stirring at a constant temperature for 30-60 minutes after all the additions are completed to obtain the graphene transmission oil; the heating and component adding processes are both carried out under the action of stirring.

[0022] Optionally, after the previous component is added, stirring is required for at least 5 minutes before adding the next component.

[0023] Optionally, the stirring speed is 20-30 rpm.

[0024] In summary, this application has the following beneficial effects: 1. The present application modifies graphene by using butyrimide so that the graphene can be wrapped by butyrimide micelles. The butyrimide micelles will be destroyed under high temperature conditions, thereby releasing graphene sheets. The graphene sheets will be obliquely embedded in the metal surface to form a graphene protective layer on the metal surface, thereby protecting the metal surface from wear; in addition, the graphene protective layer will also reduce the temperature of the friction surface, so that the lubricating oil is not affected by high-temperature oxidation, reduce friction power loss, and greatly improve the transmission efficiency of the gearbox to more than 96%.

[0025] 2. This application further controls the addition amount of micellar graphene within the range of 1.5-2.5 parts, and the obtained graphene transmission oil has better use effect and can increase the transmission efficiency of the whole vehicle to 98% or above. DETAILED DESCRIPTION

[0026] The present application provides a graphene transmission oil, comprising the following components in parts by weight: 1-3 parts of micellar graphene, 20-30 parts of anti-wear agent, 1-8 parts of anti-gelling agent, 5-10 parts of rust inhibitor and 950-1000 parts of base oil diester (PANESTER 8223). Further, the graphene transmission oil comprises the following components in parts by weight: 1.5-2.5 parts of micellar graphene, 20-30 parts of anti-wear agent, 1-8 parts of anti-gelling agent, 5-10 parts of rust inhibitor and 950-1000 parts of base oil.

[0027] The preparation method of micellar graphene comprises the following steps: (1) dissolving butyrimide in diester (PANESTER 8273) to obtain a premixed solution; the weight ratio of butyrimide to diester is 1:(2-3); (2) adding graphene to the premixed solution, stirring at a speed of 90-150 r / min for 30-40 min, and ultrasonically dispersing at a power of 20-25 kHz for 10-15 min; the solution was allowed to stand for 6-10 h to obtain micellar graphene; the weight ratio of butyrimide to graphene was 1:(1.3-1.8).

[0028] The present application provides a method for preparing graphene gearbox oil, comprising the following steps: First, the base oil is heated to 50-70°C under stirring; then, a rust inhibitor, an anti-wear agent, an anti-gel agent and micellar graphene are added to the base oil in sequence under stirring. After the previous component is added, stirring is required for at least 5 minutes before adding the next component. After all the additions are completed, stirring is carried out at a constant temperature for 30-60 minutes to obtain graphene gearbox oil; the stirring speed is 20-30rpm.

[0029] In the present application, diester PANESTER 8223 and diester PANESTER 8273 were both purchased from Nanjing Kailian Chemical New Materials Co., Ltd.; the number of graphene flakes was 2-5 layers, the width was 50-100 nm, and it was purchased from Beijing Graphene Technology Research Institute Co., Ltd.; butyrimide was a colorless needle-shaped crystal or a thin flake solid with a light brown luster, purchased from Shandong Xinghai Chemical Co., Ltd.; the model of aminothioester was T-323; the model of nonyl-N-(nonylphenyl)aniline was L-567; the model of dodecenylsuccinic acid half ester was T-747; the raw materials, reagents, solvents, etc. used in the present application can all be obtained commercially.

[0030] The present application is further described in detail below in combination with preparation examples, embodiments, and performance testing experiments.

[0031] Preparation Example 1-5 Preparation Examples 1-5 each provide a micellar graphene.

[0032] The difference between the above preparation examples is that the weight ratio of each raw material is as shown in Table 1 below.

[0033] The preparation method of micellar graphite provided in Preparation Example 1-5 comprises the following steps: (1) dissolving butyrimide in diester (PANESTER 8273) to obtain a premixed solution; the weight ratio of butyrimide to diester is 1:(2-3); (2) adding graphene to the premixed solution, stirring at a speed of 90-150 r / min for 30-40 min, and ultrasonically dispersing at a power of 20-25 kHz for 10-15 min; the solution was allowed to stand for 6-10 h to obtain micellar graphene; the weight ratio of butyrimide to graphene was 1:(1.3-1.8).

[0034] Table 1 Weight ratio of each raw material in the micellar graphene provided in Preparation Examples 1-5 Examples 1-5 Embodiments 1-5 respectively provide a graphene transmission oil.

[0035] The difference between the above embodiments is that the micellar graphene used in the graphene gearbox oil is derived from Preparation Examples 1-5 respectively.

[0036] The preparation method of the graphene gearbox oil provided in Examples 1-5 comprises the following steps: First, 980 g of diester (PANESTER 8223) was heated to 60° C. under stirring; then, 8 g of dodecenyl succinic acid half ester, 25 g of aminothioester, 5 g of nonyl-N-(nonylphenyl) aniline and 2 g of micellar graphene were added to the base oil in sequence under stirring. During the addition process, it should be noted that the previous component needs to be stirred for at least 5 minutes before the next component can be added. After all the additions are completed, the mixture is stirred at a constant temperature of 60° C. for 30 minutes to obtain graphene gearbox oil; the stirring speed is 30 rpm.

[0037] Embodiment 6-9 Examples 6-9 each provide a graphene transmission oil.

[0038] The difference between the above embodiment and embodiment 2 is that the amount of micellar graphene added to the graphene gearbox oil is specifically shown in Table 2 below.

[0039] Table 2 Addition amount of micellar graphene in Example 2, Examples 6-9 Example Addition amount of micellar graphene (g) 2 2 3 1 7 1.5 8 2.5 9 3 Comparative Example 1 Comparative Example 1 provides a graphene transmission oil.

[0040] The difference between the comparative example and Example 2 is that the micellar graphene is replaced by graphene.

[0041] Comparative Example 2 Comparative Example 2 provides a graphene transmission oil.

[0042] The difference between the comparative example and Example 2 is that the amount of micellar graphene added is 0 g.

[0043] Comparative Example 3 Comparative Example 3 provides a graphene transmission oil.

[0044] The difference between the comparative example and Example 2 is that the amount of micellar graphene added is 0.5 g.

[0045] Comparative Example 4 Comparative Example 4 provides a graphene transmission oil.

[0046] The difference between the above comparative example and Example 2 is: the preparation method of graphene gearbox oil.

[0047] The preparation method of the graphene gearbox oil provided in Comparative Example 4 is as follows: 8 g of dodecenyl succinic acid half ester, 25 g of aminothioester, 5 g of nonyl-N-(nonylphenyl)aniline and 2 g of micellar graphene are added to 980 g of diester (PANESTER 8223) under stirring, and then stirred for 10 minutes to obtain graphene gearbox oil.

[0048] Performance testing The performance of the graphene gearbox oils obtained in Examples 1-9 and Comparative Examples 1-4 of the present application was tested, and the results are shown in Table 3 below.

[0049] Table 3 Performance test results of graphene gearbox oils of Examples 1-9 and Comparative Examples 1-4 The test results of Examples 1-5 and Comparative Example 1 show that the friction coefficient of the graphene transmission oil prepared in Examples 1-5 is 0.13-0.15, the no-seizure load is 273-294N, the sintering load is 3645-3922N, and the transmission efficiency is 97.9-98.4%; while the friction coefficient of the graphene transmission oil prepared in Comparative Example 1 is only 0.20, the no-seizure load is 238N, the sintering load is only 2554N, and the transmission efficiency is only 94.2%. Therefore, it is shown that the graphene transmission oil prepared by micellar graphene in this application can significantly reduce the friction coefficient of the gearbox gear, increase the no-seizure load and sintering load, and thus improve the transmission efficiency of the whole vehicle.

[0050] The test results of Example 2, Example 6-9, and Comparative Example 2-3 show that the friction coefficient of the graphene transmission oil obtained in Example 2 and Example 6-9 is 0.13-0.17, the no-seizure load is 255-294N, the sintering load is 3275-3922N, and the transmission efficiency is 95.8-98.4%; while the friction coefficient of the graphene transmission oil obtained in Comparative Example 2-3 is only 0.18-0.21, the no-seizure load is 235-246N, the sintering load is only 2452-2960N, and the transmission efficiency is only 94.1-94.5%. Therefore, it is explained that the application controls the addition amount of micellar graphene within the range of 1-3 parts, and the graphene transmission oil obtained has a good use effect, can reduce the friction coefficient of the gearbox gear, increase the no-seizure load and sintering load, and thus improve the transmission efficiency of the whole vehicle. Further comparison shows that the friction coefficient of the graphene transmission oils prepared in Examples 2 and 7-8 is 0.13-0.14 (≤1.4), the no-seizure load is 281-294N (>280N), the sintering load is 3693-3922N (>3600N), and the transmission efficiency is 98.0-98.4% (≥98.0%), indicating that the application further controls the addition amount of micellar graphene to between 1.5 and 2.5 parts, and the obtained graphene transmission oil has better use effect and more significant improvement in the transmission efficiency of the whole vehicle.

[0051] The test results of Example 2 and Comparative Example 4 show that the graphene transmission oil prepared by the direct mixing method in Comparative Example 4 has a non-seizure load of only 226N, a sintering load of only 2287N, and a transmission efficiency of only 93.7%. Therefore, it is shown that the present application can make the components more evenly mixed by preheating the diester and then adding other components in sequence for constant temperature stirring, and the graphene transmission oil obtained has a higher non-seizure load and sintering load, which can significantly improve the transmission efficiency of the whole vehicle.

[0052] Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made thereto based on the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A graphene gearbox oil, characterized in that: The invention comprises the following components in parts by weight: 1-3 parts of micellar graphene, 20-30 parts of anti-wear agent, 1-8 parts of anti-gelling agent, 5-10 parts of rust inhibitor and 950-1000 parts of base oil.

2. The graphene transmission oil according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 1.5-2.5 parts of micellar graphene, 20-30 parts of anti-wear agent, 1-8 parts of anti-gelling agent, 5-10 parts of rust inhibitor and 950-1000 parts of base oil.

3. The graphene transmission oil according to claim 1, characterized in that: The preparation method of micellar graphene comprises the following steps: firstly dissolving butyrimide in diester to obtain a premixed solution; then adding graphene to the premixed solution, stirring, ultrasonically dispersing, and standing to obtain micellar graphene; The weight ratio of the butyrimide to the diester is 1:(2-3), and the weight ratio of the butyrimide to the graphene is 1:(1.3-1.8).

4. The graphene transmission oil according to claim 3, characterized in that: The diester is PANESTER 8273.

5. The graphene transmission oil according to claim 3, characterized in that: The stirring speed is 90-150 r / min, and the time is 30-40 min; the power of ultrasonic dispersion is 20-25 kHz, and the time is 10-15 min.

6. The graphene transmission oil according to claim 1, characterized in that: The number of graphene sheets is 3-5 layers, and the width is 50-100nm.

7. The graphene transmission oil according to claim 1, characterized in that: The anti-wear agent is selected from one or more of aminothioester and triphenyl thiophosphate; the anti-gelling agent is nonyl-N-(nonylphenyl) aniline; the rust inhibitor is dodecenyl succinic acid half ester; and the base oil is diester PANESTER 8223.

8. The method for preparing the graphene transmission oil according to any one of claims 1 to 7, characterized in that: The following steps are involved: First, the base oil is heated to 50-70°C; then, a rust inhibitor, an anti-wear agent, an anti-gelling agent and micellar graphene are added to the base oil in sequence, and after all the additions are completed, the mixture is stirred at a constant temperature for 30-60 minutes to obtain a graphene gearbox oil; The heating and component adding processes are both carried out under stirring.

9. The method for preparing graphene transmission oil according to claim 8, characterized in that: After the previous component is added, it needs to be stirred for at least 5 minutes before adding the next component.

10. The method for preparing graphene transmission oil according to claim 8, characterized in that: The stirring speed is 20-30 rpm.

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