Graphene rapier loom gear oil and preparation method thereof

Abstract

The invention relates to the technical field of lubricating oil, and particularly discloses graphene rapier loom gear oil and a preparation method thereof. The graphene rapier loom gear oil provided by the invention is prepared from the following components in parts by weight: 5 to 8 parts of phosphorus-containing modified graphene oxide, 1 to 5 parts of an anti-wear agent, 1 to 5 parts of an anti-oxidation and anti-gum agent, 1 to 3 parts of an anti-rust agent and 967 to 992 parts of base oil, furthermore, the gear oil is prepared from the following components in parts by weight: 6 to 7 parts of phosphorus-containing modified graphene oxide, 1 to 5 parts of an anti-wear agent, 1 to 5 parts of an anti-oxidation and anti-gum agent, 1 to 3 parts of an anti-rust agent and 967 to 992 parts of base oil, the invention also provides a preparation method of the graphene rapier loom gear oil. The graphene rapier loom gear oil provided by the invention is good in extreme pressure anti-wear performance, the friction coefficient of a loom gear can be greatly reduced, the extreme pressure performance and the sintering load are improved, and the service life of the gear oil is prolonged while equipment is ensured not to be worn and sintered.

Description

Technical Field

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

[0002] In recent years, lubricant technology has made significant progress in improving the operating efficiency of mechanical equipment and reducing wear. With the continuous upgrading of industrial production, the demand for high-performance lubricants is growing, especially in the textile industry. Rapier looms are widely used due to their high efficiency and flexibility. Gear oil is the lubricating medium for its key components, and its performance directly affects the stable operation and service life of the loom. Although traditional gear oil can meet basic lubrication needs, its performance under extreme working conditions still needs to be improved.

[0003] At present, the commonly used solutions in the market include the use of different types of additives to improve the performance of base oils. Common additives include anti-wear agents, antioxidants, rust inhibitors, etc. These additives enhance the anti-wear, anti-oxidation and anti-rust capabilities by changing the chemical properties of the base oil. In addition, some advanced technologies also include the use of nanomaterials such as nano-silica and nano-carbon tubes to further improve the performance of lubricants. However, although the above measures have improved the performance of gear oils to a certain extent, loom gears are still prone to wear and sintering under extreme conditions such as high loads and high temperatures, resulting in increased equipment failure rates and rising maintenance costs.

[0004] Therefore, there is an urgent need to develop a new type of gear oil to ensure that the friction coefficient can be effectively reduced under extreme working conditions, and the extreme pressure performance and sintering load can be improved, thereby ensuring the long-term stable operation of the equipment. Summary of the invention

[0005] In order to improve the extreme pressure performance and sintering load of loom gear oil, the present application provides a graphene rapier loom gear oil and a preparation method thereof.

[0006] In the first aspect, the present application provides a graphene rapier loom gear oil, which adopts the following technical solution: A graphene rapier loom gear oil comprises the following components in parts by weight: 5-8 parts of phosphorus-containing modified graphene oxide, 1-5 parts of an anti-wear agent, 1-5 parts of an antioxidant and anti-gelling agent, 1-3 parts of a rust inhibitor, and 967-992 parts of a base oil.

[0007] The present application adopts phosphorus-modified graphene oxide, anti-wear agent, etc. to prepare a graphene rapier loom gear oil, which has excellent extreme pressure and anti-wear performance, can significantly reduce the friction coefficient of loom gears, improve extreme pressure performance and sintering load, and effectively prevent equipment from being damaged by wear and sintering, thereby extending the service life of the equipment. Specifically, phosphorus-modified graphene oxide can be suspended in the gear oil. When boundary friction occurs at the rapier loom gear, under high temperature and high pressure conditions, the phosphorus-containing group can react chemically with the metal surface to form a protective film, and the graphene can exert its excellent properties of high olefin strength, low friction coefficient and high thermal conductivity, protect the metal surface from wear, quickly reduce the temperature of the friction surface, and prevent the lubricating oil from being oxidized due to high temperature, thereby improving its load resistance and service life.

[0008] Optionally, the following components are included in parts by weight: 6-7 parts of phosphorus-modified graphene oxide, 1-5 parts of anti-wear agent, 1-5 parts of antioxidant and anti-gelling agent, 1-3 parts of rust inhibitor, and 967-992 parts of base oil.

[0009] In some embodiments, the weight proportion of the phosphorus-modified graphene oxide may be 5-6 parts, 5-7 parts, 5-8 parts, 6-7 parts, 6-8 parts or 7-8 parts.

[0010] In a specific embodiment, the weight proportion of the phosphorus-modified graphene oxide may also be 5 parts, 6 parts, 7 parts or 8 parts.

[0011] Optionally, the method for preparing the phosphorus-modified graphene oxide comprises the following steps: (1) preparing a 1-2 mg / mL solution of graphene oxide and water, and obtaining a graphene oxide solution by ultrasonic dispersion; (2) adding phosphoric acid to the above graphene oxide solution, and obtaining a mixed solution by ultrasonic dispersion; the volume ratio of the graphene oxide solution to the phosphoric acid is 100:(2-4); (3) stirring the mixed solution at 190-220° C. for 10-13 hours to obtain phosphorus-containing graphene oxide gel; (4) The phosphorus-containing graphene oxide gel is mixed with a detergent, and then the mixture is mixed and stirred with water, and then ground, homogenized, and freeze-dried to obtain phosphorus-containing modified graphene oxide.

[0012] The present application provides a method for preparing phosphorus-modified graphene oxide, which can effectively improve the surface properties of graphene oxide, so that it has better dispersibility and stability in base oil. Specifically: first, by preparing a solution of graphene oxide and water and performing ultrasonic dispersion, the uniform distribution of graphene oxide in the solution can be ensured, thereby providing a good basis for subsequent chemical modification; then, phosphoric acid is added to the graphene oxide solution and ultrasonic dispersion is performed again, so that the phosphoric acid molecules can be evenly distributed on the surface of graphene oxide to form a stable mixed solution, which helps to enhance the lipophilicity of graphene oxide and improve its dispersibility in base oil; then the mixed solution is stirred and reacted at high temperature for 10-13 hours, which can promote the chemical bonding between phosphoric acid and graphene oxide, forming a phosphorus-containing graphene oxide structure with high stability; finally, the phosphorus-containing graphene oxide gel is mixed with a detergent and a series of post-treatments are performed to further improve the purity and dispersibility of the phosphorus-modified graphene oxide, so that it exhibits excellent anti-wear performance and extreme pressure performance in gear oil. Therefore, the phosphorus-modified graphene oxide provided in the present application has excellent dispersibility, wear resistance and extreme pressure properties. Using it to prepare graphene rapier loom gear oil can significantly improve the extreme pressure and wear resistance of the graphene rapier loom gear oil, reduce the friction coefficient of the loom gear, improve the extreme pressure performance and sintering load, thereby extending the service life of the equipment and gear oil.

[0013] In some embodiments, the concentration of graphene oxide in the graphene oxide solution may be 1-1.5 mg / mL or 1.5-2 mg / mL. In a specific embodiment, the concentration of graphene oxide in the graphene oxide solution may also be 1 mg / mL, 1.5 mg / mL or 2 mg / mL.

[0014] Optionally, the volume ratio of the graphene oxide solution to phosphoric acid is 100:(2.5-3.5).

[0015] In some embodiments, the volume ratio of the graphene oxide solution to phosphoric acid can be 100:(2-2.5), 100:(2-3), 100:(2-3.5), 100:(2-4), 100:(2.5-3), 100:(2.5-3.5), 100:(2.5-4), 100:(3-3.5), 100:(3-4) or 100:(3.5-4).

[0016] In a specific embodiment, the volume ratio of the graphene oxide solution to phosphoric acid can also be 100:2, 100:2.5, 100:3, 100:3.5 or 100:4.

[0017] Optionally, the concentration of the phosphoric acid is 75-85%.

[0018] Optionally, the anti-wear agent is Irgalube 349, the antioxidant and anti-gelling agent is octylbutyl diphenylamine and / or a phenolic antioxidant; the rust inhibitor is an imidazoline derivative; and the base oil is PAG water-insoluble polyether and / or mixed acid pentaerythritol ester.

[0019] Optionally, the base oil is a mixture of PAG water-insoluble polyether, mixed acid and pentaerythritol ester.

[0020] Optionally, the weight ratio of the PAG water-insoluble polyether to the mixed acid and the pentaerythritol ester is 1:(0.67-1).

[0021] In some embodiments, the weight ratio of the PAG water-insoluble polyether, the mixed acid and the pentaerythritol ester can also be 1:(0.67-0.72), 1:(0.67-0.78), 1:(0.67-0.83), 1:(0.67-1), 1:(0.72-0.78), 1:(0.72-0.83), 1:(0.72-1), 1:(0.78-0.83), 1:(0.78-1) or 1:(0.83-1).

[0022] In a specific embodiment, the weight ratio of the PAG water-insoluble polyether to the mixed acid and the pentaerythritol ester may also be 1:0.67, 1:0.72, 1:0.78, 1:0.83 or 1:1.

[0023] In a second aspect, the present application provides a method for preparing graphene rapier loom gear oil.

[0024] A method for preparing a graphene rapier loom gear oil comprises the following steps: stirring and heating a base oil to 50-60° C., then sequentially adding a rust inhibitor, an anti-wear agent, an antioxidant and an anti-gelling agent and phosphorus-containing modified graphene oxide to the base oil, and continuing to stir at a constant temperature for 30-40 minutes after all the additions are completed to obtain the graphene rapier loom gear oil.

[0025] Optionally, the time interval for adding the rust inhibitor, anti-wear agent, antioxidant and anti-gelling agent and phosphorus-modified graphene oxide is maintained at least 5 minutes; and the stirring speed in the above preparation method is 20-30 rpm.

[0026] In summary, this application has the following beneficial effects: 1. This application uses phosphorus-modified graphene oxide to prepare graphene rapier loom gear oil, which can significantly improve the extreme pressure and anti-wear properties of graphene rapier loom gear oil, reduce the friction coefficient of loom gears, improve extreme pressure performance and sintering load, thereby extending the service life of equipment and gear oil 2. The present application further controls the volume ratio of the graphene oxide solution to phosphoric acid in the preparation method of phosphorus-modified graphene oxide within the range of 100:(2.5-3.5), and the obtained graphene rapier loom gear oil has better extreme pressure and anti-wear properties, a friction coefficient of 0.10-0.11, an extreme pressure performance OK load value of 315-333N, and a sintering load PD value of 3790-3825N.

[0027] 3. The present application further adopts a mixture of PAG water-insoluble polyether and mixed acid and pentaerythritol ester as the base oil, and controls the weight ratio of the two within the range of 1:(0.67-1). The obtained graphene rapier loom gear oil has better extreme pressure and wear resistance, the extreme pressure performance OK load value can reach more than 340N, and the sintering load PD value can reach more than 4300N. DETAILED DESCRIPTION

[0028] The present application provides a graphene rapier loom gear oil, comprising the following components in parts by weight: 5-8 parts of phosphorus-modified graphene oxide, 1-5 parts of anti-wear agent, 1-5 parts of antioxidant and anti-gelling agent, 1-3 parts of rust inhibitor, and 967-992 parts of base oil. Further, the graphene rapier loom gear oil comprises the following components in parts by weight: 6-7 parts of phosphorus-modified graphene oxide, 1-5 parts of anti-wear agent, 1-5 parts of antioxidant and anti-gelling agent, 1-3 parts of rust inhibitor, and 967-992 parts of base oil.

[0029] The anti-wear agent is Irgalube 349, the antioxidant and anti-gelling agent is octylbutyl diphenylamine and / or a phenolic antioxidant; the rust inhibitor is an imidazoline derivative; and the base oil is PAG water-insoluble polyether and / or mixed acid pentaerythritol ester.

[0030] In the present application, the method for preparing phosphorus-modified graphene oxide comprises the following steps: (1) preparing a 1-2 mg / mL solution of graphene oxide and water, and ultrasonically dispersing the solution at a power of 15-25 kHz for 10-20 min to obtain a graphene oxide solution; (2) adding 75-85wt% phosphoric acid to the above graphene oxide solution, and ultrasonically dispersing at a power of 15-25kHz for 30-40min to obtain a mixed solution; the volume ratio of the graphene oxide solution to the 75-85wt% phosphoric acid is 100:(2-4); further, the volume ratio of the graphene oxide solution to the 75-85wt% phosphoric acid is 100:(2.5-3.5); (3) loading the mixed solution into a preheated autoclave, stirring and reacting at 190-220° C. for 10-13 h to obtain phosphorus-containing graphene oxide gel; (4) The phosphorus-containing graphene oxide gel and the detergent are mixed in a weight ratio of 10: (0.8-1.5); then the mixture is mixed and stirred with water in a weight ratio of 1: (0.8-1.2), and the mixture is ground, homogenized, and freeze-dried to obtain phosphorus-containing modified graphene oxide.

[0031] The preparation method of graphene rapier loom gear oil provided in the present application comprises the following steps: stirring and heating the base oil to 50-60°C, and then sequentially adding a rust inhibitor, an anti-wear agent, an antioxidant and an anti-gelling agent, and phosphorus-modified graphene oxide to the base oil; after adding one, stirring for at least 5 minutes before adding the next one; after all the additions are completed, stirring at a constant temperature for 30-40 minutes to obtain the graphene rapier loom gear oil, and the stirring speed in the above process is 20-30 rpm.

[0032] In the present application, the graphene oxide has 5 to 10 layers and a diameter of 0.5 to 1 μm; the detergent is DP5670, purchased from BASF; the anti-wear agent is Irgalube 349, purchased from BASF; the octylbutyl diphenylamine is L-57, purchased from Beijing Yilinair Petrochemical Co., Ltd.; the phenolic antioxidant is L135, purchased from Beijing Yilinair Petrochemical Co., Ltd.; the imidazoline derivative is Amine O, purchased from BASF; the PAG water-insoluble polyether is KLP150, purchased from Beijing Yilinair Petrochemical Co., Ltd.; the mixed acid pentaerythritol ester is TRQY28, purchased from Beijing Yilinair Petrochemical Co., Ltd. The raw materials, reagents, solvents, etc. used in this application can all be obtained commercially.

[0033] The present application is further described in detail below in combination with preparation examples, embodiments, and performance testing experiments.

[0034] Preparation Example 1 Preparation Example 1 provides a phosphorus-modified graphene oxide, comprising the following steps: (1) preparing a 1 mg / mL solution of graphene oxide and water, and ultrasonically dispersing the solution at a power of 20 kHz for 10 min to obtain a graphene oxide solution; (2) adding 80 wt % phosphoric acid to the above graphene oxide solution, and ultrasonically dispersing at a power of 20 kHz for 30 min to obtain a mixed solution; the volume ratio of the graphene oxide solution to 80 wt % phosphoric acid is 100:3; (3) loading the mixed solution into a preheated autoclave, stirring and reacting at 200° C. for 10 h to obtain phosphorus-containing graphene oxide gel; (4) 100 g of phosphorus-containing graphene oxide gel is mixed with 1 g of a detergent; then 100 g of the mixture is mixed with 100 g of water, and the mixture is ground, homogenized, and freeze-dried to obtain phosphorus-containing modified graphene oxide.

[0035] Preparation Example 2 Preparation Example 2 provides a phosphorus-modified graphene oxide The difference between the above preparation example and preparation example 1 is that the concentration of graphene oxide in the graphene oxide solution is 1.5 mg / mL.

[0036] Preparation Example 3 Preparation Example 3 provides a phosphorus-modified graphene oxide The difference between the above preparation example and preparation example 1 is that the concentration of graphene oxide in the graphene oxide solution is 2 mg / mL.

[0037] Preparation Example 4-7 Preparation Examples 4-7 each provide a phosphorus-modified graphene oxide.

[0038] The difference between the above preparation example and preparation example 2 is that the volume ratio of graphene oxide solution to phosphoric acid is specifically shown in Table 1 below.

[0039] Table 1 Volume ratio of graphene oxide solution to phosphoric acid in Preparation Example 2 and Preparation Examples 4-7 Preparation Example Volume ratio of graphene oxide solution to phosphoric acid 2 100：3 4 100：2 5 100：2.5 6 100：3.5 7 100：4 Examples 1-7 Examples 1-7 each provide a graphene rapier loom gear oil.

[0040] The difference between the above embodiments is that the phosphorus-modified graphene oxide used in embodiments 1-7 is derived from preparation examples 1-7, respectively.

[0041] The preparation method of the graphene rapier loom gear oil provided in Examples 1-7 comprises the following steps: stirring and heating 985 g of base oil (KLP150) to 60 ° C, and then sequentially adding 3 g of rust inhibitor (Amine O), 4 g of anti-wear agent (Irgalube 349), 3 g of antioxidant and anti-gel agent (a mixture of 2 g L-57 and 4 g L135) and 7 g of phosphorus-modified graphene oxide to the base oil. After adding one, stirring for 5 min before adding the next one; after all the additions are completed, stirring at a constant temperature for 30 min to obtain graphene rapier loom gear oil, and the stirring speed in the above process is 25 rpm.

[0042] Embodiment 8-10 Examples 8-10 respectively provide a graphene rapier loom gear oil.

[0043] The difference between the above embodiment and embodiment 2 is that the amount of phosphorus-modified graphene oxide added is as shown in Table 2 below.

[0044] Table 2 Addition amount of phosphorus-modified graphene oxide in Example 2, Example 8-10 Example Addition amount of phosphorus-modified graphene oxide (g) 2 7 8 5 9 6 10 8 Examples 11-16 Examples 11-16 each provide a graphene rapier loom gear oil.

[0045] The difference between the above embodiment and embodiment 2 is: the type and ratio of base oil, as shown in Table 3 below.

[0046] Table 3 Types and ratios of base oils used in Example 2 and Examples 11-16 Comparative Example 1 Comparative Example 1 provides a graphene rapier loom gear oil.

[0047] The difference between the comparative example and Example 2 is that the phosphorus-modified graphene oxide is replaced by graphene oxide.

[0048] Comparative Example 2 Comparative Example 2 provides a graphene rapier loom gear oil.

[0049] The difference between the comparative example and Example 2 is that the addition amount of phosphorus-modified graphene oxide is 0.

[0050] Performance testing The performance of the graphene rapier loom gear oil obtained in Examples 1-16 and Comparative Examples 1-2 was tested, and the results are shown in Table 4 below.

[0051] (1) Friction coefficient: tested in accordance with ASTM D6425-2019.

[0052] (2) Extreme pressure performance OK load value: Tested in accordance with GB / T 11144-2007.

[0053] (3) Sintering load PD value: Tested in accordance with GB / T 3142.

[0054] Table 4 Performance test results of graphene rapier loom gear oil obtained in Examples 1-16 and Comparative Examples 1-2 According to the test results of Table 4, the friction coefficient of the graphene rapier loom gear oil obtained in Examples 1-16 of the present application is 0.10-0.12, the extreme pressure performance OK load value is 28.88-36.53kg, and the sintering load PD value is 3090-4905N. The friction coefficient of the graphene rapier loom gear oil obtained in Comparative Examples 1-2 is 0.15-0.17, the extreme pressure performance OK load value is only 257-268N, and the sintering load PD value is only 2453-2768N. Therefore, it is shown that the graphene rapier loom gear oil provided by the present application has a lower friction coefficient and good extreme pressure and anti-wear performance. Using it for loom gears can greatly reduce the friction coefficient of loom gears and improve extreme pressure performance and sintering load.

[0055] 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 rapier loom gear oil, characterized in that: The invention comprises the following components in parts by weight: 5-8 parts of phosphorus-modified graphene oxide, 1-5 parts of anti-wear agent, 1-5 parts of antioxidant and anti-gelling agent, 1-3 parts of rust inhibitor and 967-992 parts of base oil.

2. The graphene rapier loom gear oil according to claim 1, characterized in that: The invention comprises the following components in parts by weight: 6-7 parts of phosphorus-modified graphene oxide, 1-5 parts of anti-wear agent, 1-5 parts of antioxidant and anti-gelling agent, 1-3 parts of rust inhibitor and 967-992 parts of base oil.

3. The graphene rapier loom gear oil according to claim 1, characterized in that: The method for preparing the phosphorus-modified graphene oxide comprises the following steps: (1) preparing a 1-2 mg / mL solution of graphene oxide and water, and obtaining a graphene oxide solution by ultrasonic dispersion; (2) adding phosphoric acid to the above graphene oxide solution, and obtaining a mixed solution by ultrasonic dispersion; the volume ratio of the graphene oxide solution to the phosphoric acid is 100:(2-4); (3) stirring the mixed solution at 190-220° C. for 10-13 hours to obtain phosphorus-containing graphene oxide gel; (4) The phosphorus-containing graphene oxide gel is mixed with a detergent, and then the mixture is mixed with water and stirred, and then ground, homogenized, and freeze-dried to obtain phosphorus-containing modified graphene oxide.

4. The graphene rapier loom gear oil according to claim 1, characterized in that: The volume ratio of the graphene oxide solution to phosphoric acid is 100:(2.5-3.5).

5. The graphene rapier loom gear oil according to claim 1, characterized in that: The concentration of the phosphoric acid is 75-85%.

6. The graphene rapier loom gear oil according to claim 1, characterized in that: The anti-wear agent is Irgalube349, the antioxidant and anti-gelling agent is octylbutyl diphenylamine and / or a phenolic antioxidant; the rust inhibitor is an imidazoline derivative; and the base oil is PAG water-insoluble polyether and / or mixed acid pentaerythritol ester.

7. The method for preparing the graphene rapier loom gear oil according to any one of claims 1 to 6, characterized in that: The method comprises the following steps: stirring and heating the base oil to 50-60° C., then sequentially adding a rust inhibitor, an anti-wear agent, an antioxidant and an anti-gelling agent and phosphorus-containing modified graphene oxide to the base oil, and continuing to stir at a constant temperature for 30-40 minutes after all the additions are completed to obtain graphene rapier loom gear oil.

8. The method for preparing graphene rapier loom gear oil according to claim 7, characterized in that: The time interval for adding the rust inhibitor, anti-wear agent, antioxidant and anti-gelling agent and phosphorus-modified graphene oxide is at least 5 minutes; the stirring speed in the above preparation method is 20-30 rpm.

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