A long-acting energy-saving air compressor oil and its preparation method

Abstract

This application relates to the technical field of air compressor oils, and specifically discloses a long-lasting energy-saving air compressor oil, which includes a base oil and additives. By weight, the base oil includes 60-80 parts of PAO-based base oil, 10-15 parts of synthetic ester oil, and 10-15 parts of oil-soluble polyether; the additives include 0.1-1.0 part of antioxidant, 0.1-0.5 part of rust inhibitor, and 0.1-0.5 part of metal corrosion inhibitor; it also includes 0.5-1.5 parts of pressure-responsive additive; the air compressor oil system of the present invention performs excellently in optimizing the surface lubrication state of the friction pair, enhancing the stability and durability of the oil film, intelligently responding to pressure changes, and extending the oil change cycle. These advantages work together to enable the entire air compressor system to achieve a higher energy efficiency ratio and lower energy consumption during operation, thus achieving the effect of long-lasting energy saving.

Description

Technical Field

[0001] The present invention relates to the technical field of air compressor oils, and particularly to a long-lasting energy-saving air compressor oil and a preparation method thereof. Background Art

[0002] Air compressor oil, also known as air compressor lubricating oil, is a liquid lubricant widely used in various types of machinery. Its main functions include reducing friction, protecting machinery and workpieces, cooling, cleaning, rust prevention, sealing, and buffering. Air compressor oil forms a protective film on the metal surface, avoiding direct contact between metals, buffering the action of frictional force, thereby reducing wear and extending the service life of the equipment.

[0003] However, the existing air compressor oils on the market currently have some defects. First, since the main function of an air compressor is to compress air and the operating environment is a high-temperature and high-pressure environment, a large amount of heat will be generated during the operation of the air compressor. If the cooling performance of the lubricating oil is insufficient, it may cause the equipment to overheat and affect normal operation. Second, air compressor oil is prone to oxidation at high temperatures, generating impurities such as gums and sludge, resulting in deterioration and coking of the oil product, thereby reducing the mechanical efficiency of the equipment. In addition, air compressor oil may accelerate aging during use due to excessive temperature or dust pollution, further affecting its performance.

[0004] The main reasons for these problems are that existing air compressor oils are difficult to maintain stable performance under high-temperature, high-pressure, and high-load working environments, are prone to carbon deposition and sediment formation, increasing the risk of equipment failure. Therefore, it is particularly important to develop a long-lasting energy-saving air compressor oil. Summary of the Invention

[0005] Aiming at the problem that the existing air compressor oil is difficult to maintain stability under high-temperature, high-pressure, and high-load working environments, the present invention provides a long-lasting energy-saving air compressor oil and a preparation method thereof.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A long-lasting energy-saving air compressor oil, comprising a base oil and additives. By weight, the base oil includes 60 - 80 parts of PAO base oil, 10 - 15 parts of synthetic ester oil, and 10 - 15 parts of oil-soluble polyether; the additives include 0.1 - 1.0 part of antioxidant, 0.1 - 0.5 part of rust inhibitor, 0.1 - 0.5 part of metal corrosion inhibitor; and also includes 0.5 - 1.5 parts of pressure-responsive additive.

[0007] Further, the PAO base oil is PAO20, PAO30, or a combination of the two.

[0008] The synthetic ester oil is a polyol saturated fatty acid ester.

[0009] The oil-soluble polyether is a water-insoluble polyether.

[0010] The antioxidant is an aromatic amine antioxidant, a hindered phenolic antioxidant or a phenolic ester antioxidant.

[0011] The rust inhibitor is one or more of long-chain carboxylic acids, alkenyl succinic acids, and sorbitan monooleate.

[0012] The metal corrosion inhibitor is a benzotriazole derivative or a thiadiazole derivative.

[0013] Preferably, the pressure-responsive additive is a modified perfluoropolyether. The present invention provides two modification methods, namely 3-aminopropyltriethoxysilane-modified perfluoropolyether and 3-aminopropyltriethoxysilane and molybdenum disulfide-modified perfluoropolyether.

[0014] Adding the modified perfluoropolyether into the air compressor oil can optimize the formulation ratio inside the entire air compressor oil. Even under the condition of not adding extreme pressure and anti-wear agents, excellent extrusion anti-wear effects can still be achieved. The air compressor oil system of the present invention performs excellently in terms of energy conservation, long-term performance, friction performance, etc.

[0015] When speculating on the internal reasons, it may be that the molecular structure of the modified perfluoropolyether changes under high-pressure conditions, or the chemical bonds inside the molecule are reorganized, resulting in enhanced intermolecular interactions. With the change of the molecular structure, these substances can form a more stable protective film on the metal surface. This protective film can effectively isolate the metal surface, reduce direct contact, and thus reduce wear. Further, the formed protective film has a high oil film strength, so it remains stable under high loads and is not easily broken. It is precisely because of the improved stability and strength of the protective film that the wear resistance of the material is enhanced, which enables the air compressor oil to still maintain good lubrication effects after long-term operation.

[0016] For the first modification method, specifically, when the modified perfluoropolyether is 3-aminopropyltriethoxysilane-modified perfluoropolyether, preferably, in the modified perfluoropolyether, the weight ratio of the perfluoropolyether to 3-aminopropyltriethoxysilane is 4 - 4.5:1.

[0017] Through the above technical solution, when the weight ratio of perfluoropolyether to 3-aminopropyltriethoxysilane is within the range of 4 - 4.5:1, the compatibility between the two is good. It can not only provide excellent lubrication performance and high-temperature stability for the air compressor oil, but also has an excellent promotion effect on the wear resistance and antioxidant performance of the oil product.

[0018] Under high-pressure conditions, the silane oxygen groups (Si-O-C2H5) in 3-aminopropyltriethoxysilane molecules will undergo hydrolysis reactions to generate reactive silanols (Si-OH). The reactive silanols can then undergo condensation reactions with the hydroxyl groups (M-OH) on the metal surface to form stable silicon-oxygen bonds (Si-O-M), thereby forming a dense, chemically bonded protective film on the metal surface. This protective film not only enhances the strength and stability of the oil film but also improves its wear resistance and corrosion resistance.

[0019] At the same time, the amino groups (NH2) in 3-aminopropyltriethoxysilane molecules also have a certain degree of reactivity and can react with other functional groups on the metal surface to further enhance the binding force between the oil film and the metal surface.

[0020] Furthermore, the modified perfluoropolyether is prepared through the following steps:

[0021] Dissolve 3-aminopropyltriethoxysilane in a mixed solvent of toluene and methanol, maintaining the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1 - 0.3 mol / L, heating and maintaining the temperature at 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry under the condition of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane-modified perfluoropolyether.

[0022] By selecting the solvent for dissolving 3-aminopropyltriethoxysilane, controlling the concentration, and adjusting the temperature during the preparation process, the modification of perfluoropolyether by 3-aminopropyltriethoxysilane is achieved, regulating the fluidity, permeability, and lubricating performance of the modified perfluoropolyether under high-pressure conditions to ensure that the oil film can maintain stable performance under different working conditions.

[0023] In addition, the introduction of 3-aminopropyltriethoxysilane can also improve the compatibility of perfluoropolyether with other additives, enhance its dispersibility and stability in the air compressor oil system, reduce the defects and inhomogeneities in the oil film, and further improve the overall performance of the air compressor oil.

[0024] Specifically, in the mixed solvent of toluene and methanol, the volume ratio of toluene to methanol is 1:1.

[0025] For the second modification method, specifically, when the modified perfluoropolyether is 3-aminopropyltriethoxysilane and molybdenum disulfide-modified perfluoropolyether, preferably, the weight part ratio among perfluoropolyether, molybdenum disulfide, and 3-aminopropyltriethoxysilane is 3 - 3.5:1 - 1.5:1.

[0026] Molybdenum disulfide, as a layered structure material, has weak van der Waals forces between its layers and is prone to slip under the action of shear force. When molybdenum disulfide is added to the air compressor oil system, it can form a physical adsorption film on the friction surface, reducing the direct contact and wear between metal surfaces. At the same time, molybdenum disulfide also has a certain self-healing ability, which can release new lubricant molecules at the worn parts, further extending the service life of the oil film.

[0027] By compounding a certain mass of molybdenum disulfide, the synergistic effect between molybdenum disulfide, 3-aminopropyltriethoxysilane, and perfluoropolyether is enhanced. The physical adsorption film of molybdenum disulfide provides more reaction sites for 3-aminopropyltriethoxysilane, making it easier for 3-aminopropyltriethoxysilane to chemically bond with the metal surface. At the same time, the chemical bonding of 3-aminopropyltriethoxysilane enhances the stability and durability of the molybdenum disulfide physical adsorption film.

[0028] Furthermore, the particle size of the molybdenum disulfide is 30 - 40 nm.

[0029] Using molybdenum disulfide of this particle size range to modify perfluoropolyether makes the pressure-responsive additive as a whole have higher extreme pressure and anti-wear capabilities. Molybdenum disulfide of this particle size range is small in size and large in specific surface area. After modification and used as an additive, it has good suspension stability in engine oil, which helps to maintain its uniform distribution in the engine oil and reduce the occurrence of precipitation; during the operation of the air compressor, it can form a more uniform and firm protective film on the friction surface, thus providing better lubrication effects. And it has been proven by experiments that it also has excellent effects in terms of antioxidant performance, which has a qualitative improvement in the service mileage of air compressor oil.

[0030] Furthermore, the modified perfluoropolyether is prepared by the following steps:

[0031] First, immerse molybdenum disulfide in 3-aminopropyltriethoxysilane for 4 - 6 hours;

[0032] Immerse molybdenum disulfide in 3-aminopropyltriethoxysilane so that the surface of the molybdenum disulfide powder is covered by 3-aminopropyltriethoxysilane, improving the compatibility and adhesion between the subsequent molybdenum disulfide and the perfluoropolyether matrix.

[0033] Dissolve the 3-aminopropyltriethoxysilane impregnated with molybdenum disulfide in a mixed solvent of toluene and methanol, keeping the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1 - 0.3 mol / L, heating and maintaining the temperature at 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry under the condition of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane and molybdenum disulfide modified perfluoropolyether.

[0034] Here, in the mixed solvent of toluene and methanol, the volume ratio of toluene to methanol is 1:1.

[0035] By adjusting parameters such as the ratio and addition sequence of molybdenum disulfide and 3-aminopropyltriethoxysilane modified perfluoropolyether, the active components of the modified perfluoropolyether are rapidly released and migrate to the friction surface to form an effective protective film under high-pressure conditions, giving full play to the role of molybdenum disulfide.

[0036] Preferably, the perfluoropolyether used in the above two modification methods is a Z-type perfluoropolyether with a molecular weight of 2000 - 5000.

[0037] Perfluoropolyether has various synthesis methods. According to different monomers and polymerization methods, four types of perfluoropolyethers with different molecular structures, namely K-type, Y-type, Z-type, and D-type, are obtained. This patent selects Z-type perfluoropolyether as a pressure-responsive additive in air compressor oil. This is because Z-type perfluoropolyether is a linear polymer formed by the photooxidation of tetrafluoroethylene under ultraviolet light irradiation. Although K-type, Y-type, and D-type PFPEs also have excellent chemical stability and high-temperature resistance, their molecular structures are not suitable for use as pressure-responsive additives, and this is also the case after experiments.

[0038] Furthermore, the present invention limits the molecular weight of perfluoropolyether to between 2000 and 5000. The Z-type perfluoropolyether within this range can not only maintain good fluidity and permeability but also provide sufficient lubrication performance, thus meeting the usage requirements of air compressor oil.

[0039] The present invention provides a preparation method for long-lasting energy-saving air compressor oil, including the following steps: adding PAO-based oil, antioxidant, pressure-responsive additive, and rust inhibitor into a container, and stirring for 20 - 30 min until the oil liquid is uniform; after heating to 50 - 60 °C, adding synthetic ester oil, oil-soluble polyether, and metal corrosion inhibitor in sequence, and stirring for 20 - 30 min to obtain long-lasting energy-saving air compressor oil.

[0040] Beneficial effects:

[0041] The air compressor oil prepared by the present invention using a pressure-responsive additive depends on chemical bonding, surface modification, synergistic action with other substances in the system, and the pressure-responsive mechanism in a high-pressure environment, etc. It enhances the strength and stability of the oil film by releasing active components under high-pressure conditions, mainly by optimizing the lubrication performance of the friction pair surface, significantly reducing the friction coefficient, reducing abnormal wear, and effectively reducing the accident rate and energy consumption of the equipment.

[0042] It has been experimentally proven that this additive has excellent extreme pressure and anti-wear properties as well as antioxidant properties. Under simulated high-temperature oxidation test conditions, the oil can operate for up to 12,000 hours without significant oxidation decomposition, far exceeding the common 2,000 - 4,000 hours of oils in the market, greatly reducing the oil change cycle and maintenance costs.

[0043] The air compressor oil system of the present invention performs excellently in optimizing the surface lubrication state of the friction pair, enhancing the stability and durability of the oil film, intelligently responding to pressure changes, and extending the oil change cycle. These advantages work together to enable the entire air compressor system to achieve a higher energy efficiency ratio and lower energy consumption during operation, thus achieving the effect of long-term energy conservation. Detailed Description of the Invention

[0044] The following provides a detailed description of the specific embodiments of the present invention. The present invention can be implemented in many other ways different from those described herein. Those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used are only for describing the specific embodiments and do not limit the present invention.

[0045] A long-term energy-saving air compressor oil, comprising a base oil and an additive. By weight, the base oil includes 60 - 80 parts of PAO base oil, 10 - 15 parts of synthetic ester oil, and 10 - 15 parts of oil-soluble polyether; the additive includes 0.1 - 1.0 part of antioxidant, 0.1 - 0.5 part of rust inhibitor, 0.1 - 0.5 part of metal corrosion inhibitor; and further includes 0.5 - 1.5 parts of pressure-responsive additive.

[0046] Further, the PAO base oil is PAO20, PAO30, or a combination of the two.

[0047] The synthetic ester oil is a polyol saturated fatty acid ester.

[0048] The oil-soluble polyether is selected from RJ-150 or RJ-220 produced by Jilin Regal Special Chemicals Co., Ltd.

[0049] The antioxidant is an aromatic amine antioxidant, a hindered phenolic antioxidant, or a phenolic ester antioxidant.

[0050] The rust inhibitor is one or more of long-chain carboxylic acid, alkenyl succinic acid, and sorbitan monooleate.

[0051] The metal corrosion inhibitor is a benzotriazole derivative or a thiadiazole derivative.

[0052] The pressure-responsive additive is a modified perfluoropolyether. The present invention provides two modification methods, namely 3-aminopropyltriethoxysilane-modified perfluoropolyether and 3-aminopropyltriethoxysilane and molybdenum disulfide-modified perfluoropolyether.

[0053] In the following modification processes, it is necessary to ensure that the raw materials are in a clean state to avoid any possible impurities interfering with the subsequent modification and the preparation process of the air compressor oil.

[0054] In the first modification method, when the modified perfluoropolyether is 3-aminopropyltriethoxysilane-modified perfluoropolyether, preferably, in the modified perfluoropolyether, the weight part ratio of the perfluoropolyether to 3-aminopropyltriethoxysilane is 4 - 4.5:1. In a specific embodiment, the weight part ratio can be 4:1, 4.1:1, 4.2:1, 4.3:1, 4.4:1, 4.5:1.

[0055] The modified perfluoropolyether is prepared by the following steps:

[0056] Dissolve 3-aminopropyltriethoxysilane in a mixed solvent of toluene and methanol, and keep the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1 - 0.3 mol / L. In a specific embodiment, the concentration of the mixed solution can be 0.1 mol / L, 0.2 mol / L, 0.3 mol / L. Heat up and keep the temperature in the range of 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry in the temperature range of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane-modified perfluoropolyether.

[0057] Specifically, in the mixed solvent of toluene and methanol, the volume ratio of toluene to methanol is 1:1.

[0058] In the second modification method, when the modified perfluoropolyether is 3-aminopropyltriethoxysilane and molybdenum disulfide-modified perfluoropolyether, preferably, the weight part ratio among the perfluoropolyether, molybdenum disulfide and 3-aminopropyltriethoxysilane is 3 - 3.5:1 - 1.5:1. In a specific embodiment, the weight part ratio can be 3:1:1, 3.1:1.1:1, 3.2:1.2:1, 3.3:1.3:1, 3.4:1.4:1, 3.5:1.5:1.

[0059] Among them, the particle size of the molybdenum disulfide is 30 - 40 nm.

[0060] The modified perfluoropolyether is prepared by the following steps:

[0061] First, impregnate molybdenum disulfide in 3-aminopropyltriethoxysilane for 4 - 6 hours;

[0062] Molybdenum disulfide is impregnated in 3-aminopropyltriethoxysilane so that the surface of the molybdenum disulfide powder is covered by 3-aminopropyltriethoxysilane, improving the compatibility and adhesion between the subsequent molybdenum disulfide and the perfluoropolyether matrix.

[0063] The 3-aminopropyltriethoxysilane impregnated with molybdenum disulfide is dissolved in a mixed solvent of toluene and methanol, keeping the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1 - 0.3 mol / L. In a specific embodiment, the concentration of the mixed solution can be 0.1 mol / L, 0.2 mol / L, or 0.3 mol / L. Heat up and keep the temperature in the range of 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry under the condition of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane and molybdenum disulfide modified perfluoropolyether.

[0064] Here, in the mixed solvent of toluene and methanol, the volume ratio of toluene to methanol is 1:1.

[0065] Preferably, the perfluoropolyether used in the above two modification methods is the Z-type perfluoropolyether with a molecular weight of 2000 - 5000.

[0066] Furthermore, the present invention limits the molecular weight of the perfluoropolyether to be between 2000 and 5000. The Z-type perfluoropolyether within this range can not only maintain good fluidity and permeability but also provide sufficient lubrication performance, thus meeting the usage requirements of air compressor oil.

[0067] The present invention provides a preparation method for a long-lasting energy-saving air compressor oil, including the following steps: Add PAO-based oil, antioxidant, pressure-responsive additive, and rust inhibitor into a container, and stir for 20 - 30 min until the oil liquid is uniform; after heating to 50 - 60 °C, add synthetic ester oil, oil-soluble polyether, and metal corrosion inhibitor in sequence, and stir for 20 - 30 min to obtain the long-lasting energy-saving air compressor oil.

[0068] The following is an elaboration of the examples.

[0069] The raw materials used in the examples of the present invention can all be directly purchased from the market.

[0070] Among them: The perfluoropolyether is the Z-type perfluoropolyether with a molecular weight of 2000 - 5000; the particle size range of molybdenum disulfide is 30 - 40 nm;

[0071] Preparation example of the pressure-responsive additive

[0072] Preparation example 1

[0073] In this preparation example, the weight parts ratio of perfluoropolyether to 3-aminopropyltriethoxysilane is 4:1. The preparation method is as follows: Dissolve 3-aminopropyltriethoxysilane in a mixed solvent of toluene and methanol with a volume ratio of 1:1, keep the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.3 mol / L, raise the temperature and keep it in the range of 50-60 °C; add perfluoropolyether, continuously stir for 6-8 hours, and then dry in the temperature range of 40-50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane-modified perfluoropolyether.

[0074] Preparation Example 2

[0075] In this preparation example, the weight parts ratio of perfluoropolyether to 3-aminopropyltriethoxysilane is 4.3:1. The preparation method is as follows: Dissolve 3-aminopropyltriethoxysilane in a mixed solvent of toluene and methanol with a volume ratio of 1:1, keep the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.2 mol / L, raise the temperature and keep it in the range of 50-60 °C; add perfluoropolyether, continuously stir for 6-8 hours, and then dry in the temperature range of 40-50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane-modified perfluoropolyether.

[0076] Preparation Example 3

[0077] In this preparation example, the weight parts ratio of perfluoropolyether to 3-aminopropyltriethoxysilane is 4.5:1. The preparation method is as follows: Dissolve 3-aminopropyltriethoxysilane in a mixed solvent of toluene and methanol with a volume ratio of 1:1, keep the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1 mol / L, raise the temperature and keep it in the range of 50-60 °C; add perfluoropolyether, continuously stir for 6-8 hours, and then dry in the temperature range of 40-50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane-modified perfluoropolyether.

[0078] Preparation Example 5

[0079] In this preparation example, the weight ratio of perfluoropolyether, molybdenum disulfide to 3-aminopropyltriethoxysilane is 3:1:1. The preparation method is as follows: First, completely immerse molybdenum disulfide in 3-aminopropyltriethoxysilane for 4 - 6 hours; dissolve the 3-aminopropyltriethoxysilane impregnated with molybdenum disulfide in a mixed solvent of toluene and methanol with a volume ratio of 1:1, keeping the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.3 mol / L, heating and maintaining the temperature in the range of 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry in the temperature range of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane and molybdenum disulfide modified perfluoropolyether.

[0080] Preparation Example 6

[0081] In this preparation example, the weight ratio of perfluoropolyether, molybdenum disulfide to 3-aminopropyltriethoxysilane is 3.3:1.3:1. The preparation method is as follows: First, completely immerse molybdenum disulfide in 3-aminopropyltriethoxysilane for 4 - 6 hours; dissolve the 3-aminopropyltriethoxysilane impregnated with molybdenum disulfide in a mixed solvent of toluene and methanol with a volume ratio of 1:1, keeping the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.2 mol / L, heating and maintaining the temperature in the range of 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry in the temperature range of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane and molybdenum disulfide modified perfluoropolyether.

[0082] Preparation Example 7

[0083] In this preparation example, the weight ratio of perfluoropolyether, molybdenum disulfide to 3-aminopropyltriethoxysilane is 3.5:1.5:1. The preparation method is as follows: First, completely immerse molybdenum disulfide in 3-aminopropyltriethoxysilane for 4 - 6 hours; dissolve the 3-aminopropyltriethoxysilane impregnated with molybdenum disulfide in a mixed solvent of toluene and methanol with a volume ratio of 1:1, keeping the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1 mol / L, heating and maintaining the temperature in the range of 50 - 60 °C; add perfluoropolyether, continuously stir for 6 - 8 hours, and then dry in the temperature range of 40 - 50 °C to remove the residual solvent, obtaining 3-aminopropyltriethoxysilane and molybdenum disulfide modified perfluoropolyether.

[0084] Example 1

[0085] Add PAO-based base oil, antioxidant, pressure-responsive additive, and rust inhibitor into a container, and stir for 20 - 30 min until the oil is homogeneous; after heating to 50 - 60 °C, add synthetic ester oil, oil-soluble polyether, and metal corrosion inhibitor in sequence, and obtain a long-lasting energy-saving air compressor oil after stirring for 20 - 30 min.

[0086] The weight parts of each component in Example 1 are shown in Table 1.

[0087] Examples 2 - 4

[0088] Examples 2 - 4 are prepared in the same way as Example 1, the difference is that the raw materials selected in Examples 2 - 4 are different from those in Example 1, and the weight parts of each component are different, as shown in Table 1 specifically.

[0089] Examples 5 - 9

[0090] The difference between Examples 5 - 9 and Example 4 is that the preparation examples of the pressure-responsive additives selected in Examples 5 - 9 are different from those in Example 4. The corresponding pressure-responsive additives used in Examples 5 - 9 are Preparation 2 - 6 respectively, as shown in Table 1 specifically.

[0091] Table 1: Weight parts of each component in each of Examples 1 - 9

[0092]

[0093]

[0094] Comparative Example 1

[0095] Commercially available air compressor oil for screw air compressors.

[0096] Comparative Example 2

[0097] The difference between this comparative example and Example 1 is that this comparative example uses an equal amount of perfluoropolyether to replace the pressure-responsive additive.

[0098] Comparative Example 3

[0099] The difference between this comparative example and Example 7 is that the particle size of molybdenum disulfide used in this comparative example is less than 30 nm.

[0100] Comparative Example 4

[0101] The difference between this comparative example and Example 7 is that the particle size of molybdenum disulfide used in this comparative example is 40 - 50 nm.

[0102] Comparative Example 5

[0103] The difference between this comparative example and Example 1 is that the molecular weight of the perfluoropolyether used in this comparative example is 5000 - 8000.

[0104] Comparative Example 6

[0105] The difference between this comparative example and Example 1 is that the perfluoropolyether used in this comparative example has a molecular weight of 1000 - 2000.

[0106] Comparative Example 7

[0107] The difference between this comparative example and Example 1 is that in the preparation process of this comparative example, the preparation example is slightly different. In the preparation example of this comparative example, 3-aminopropyltriethoxysilane is dissolved in a mixed solvent of toluene and methanol with a volume ratio of 1.5:1.

[0108] Comparative Example 8

[0109] The difference between this comparative example and Example 1 is that in the preparation process of this comparative example, the preparation example is slightly different. In the preparation example of this comparative example, 3-aminopropyltriethoxysilane is dissolved in a mixed solvent of toluene and methanol with a volume ratio of 1:1.5.

[0110] The oil products of Examples 1 - 9 and Comparative Examples 1 - 6 were subjected to performance tests, and the test results are shown in Table 2.

[0111] Table 2: Performance test data of the oil products of Examples 1 - 9 and Comparative Examples 1 - 6

[0112]

[0113] (Continued from the above table)

[0114]

[0115]

[0116] Experimental data shows that compared with the air compressor oil sold on the market in Comparative Example 1, under the same working conditions, the air compressor oil prepared in Examples 1 - 9 has a lower kinematic viscosity, better fluidity, and a lower friction coefficient. The oil with a lower friction coefficient generates less frictional force during lubrication, which helps to reduce internal energy consumption and thus reduce the overall energy consumption.

[0117] Under the simulated high-temperature oxidation test conditions, the air compressor oil prepared in Examples 1 - 9 can operate for up to 10,000 hours, and even up to 12,000 hours at most, without significant oxidation decomposition, indicating that the oil has good antioxidant stability and thermal stability, can maintain its performance for a longer time, thus extending the oil change cycle and the service life of the equipment. In Comparative Example 1, the oil change cycle was extended by 200% compared with ordinary oils.

[0118] It should be understood that the above embodiments are all exemplary and do not cover all possible implementation manners included in the claims. Without departing from the scope of the present disclosure, various deformations and changes can be made on the basis of the above embodiments. Similarly, various technical features of the above embodiments can be arbitrarily combined to form additional embodiments of the present invention that may not be explicitly described. Therefore, the above embodiments only represent several implementation manners of the present invention and do not limit the protection scope of the present invention patent.

Claims

1. A long-lasting energy-saving air compressor oil, comprising a base oil and an additive, characterized in that: In parts by weight, the base oil comprises 60-80 parts of PAO base oil, 10-15 parts of synthetic ester oil, and 10-15 parts of oil-soluble polyether; the additive comprises 0.1-1.0 parts of antioxidant, 0.1-0.5 parts of rust inhibitor, and 0.1-0.5 parts of metal corrosion inhibitor; and also comprises 0.5-1.5 parts of pressure-responsive additive; the pressure-responsive additive is a modified perfluoropolyether; and the perfluoropolyether is a Z-type perfluoropolyether with a molecular weight of 2000-5000; The modified perfluoropolyether is a 3-aminopropyltriethoxysilane modified perfluoropolyether; in the 3-aminopropyltriethoxysilane modified perfluoropolyether, the weight ratio of the perfluoropolyether to the 3-aminopropyltriethoxysilane is 4-4.5:1, and the perfluoropolyether is prepared by the following steps: Dissolve 3-aminopropyltriethoxysilane in a mixed solvent of toluene and methanol in a volume ratio of 1:1, maintain the concentration of 3-aminopropyltriethoxysilane in the mixed solution at 0.1-0.3 mol / L, increase the temperature and maintain it at 50-60°C; add perfluoropolyether, continue stirring for 6-8 hours, dry at 40-50°C, remove the residual solvent, and obtain 3-aminopropyltriethoxysilane modified perfluoropolyether.

2. A long-lasting energy-saving air compressor oil, comprising a base oil and an additive, characterized in that: In parts by weight, the base oil comprises 60-80 parts of PAO base oil, 10-15 parts of synthetic ester oil, and 10-15 parts of oil-soluble polyether; the additive comprises 0.1-1.0 parts of antioxidant, 0.1-0.5 parts of rust inhibitor, and 0.1-0.5 parts of metal corrosion inhibitor; and also comprises 0.5-1.5 parts of pressure-responsive additive; the pressure-responsive additive is a modified perfluoropolyether; and the perfluoropolyether is a Z-type perfluoropolyether with a molecular weight of 2000-5000; The modified perfluoropolyether is a perfluoropolyether modified by 3-aminopropyltriethoxysilane and molybdenum disulfide, wherein the weight ratio of the perfluoropolyether and molybdenum disulfide to 3-aminopropyltriethoxysilane is 3-3.5:1-1.5:1, the particle size of the molybdenum disulfide is in the range of 30-40 nm, and the perfluoropolyether is prepared by the following steps: First, immerse molybdenum disulfide in 3-aminopropyltriethoxysilane for 4-6 hours; The 3-aminopropyltriethoxysilane impregnated with molybdenum disulfide is dissolved in a mixed solvent of toluene and methanol in a volume ratio of 1:1, the concentration of 3-aminopropyltriethoxysilane in the mixed solution is maintained at 0.1-0.3 mol / L, the temperature is increased and maintained at 50-60°C; perfluoropolyether is added, and stirring is continued for 6-8 hours, and then dried at 40-50°C to remove the residual solvent to obtain 3-aminopropyltriethoxysilane and molybdenum disulfide modified perfluoropolyether.

3. The method for preparing a long-lasting energy-saving air compressor oil according to any one of claims 1 or 2, characterized in that: The following steps are involved: Add PAO base oil, antioxidant, pressure-responsive additive and rust inhibitor into the container and stir for 20 to 30 minutes until the oil is uniform; After heating to 50-60° C., the synthetic ester oil, oil-soluble polyether and metal corrosion inhibitor are added in sequence, and stirred for 20-30 minutes to obtain a long-lasting energy-saving air compressor oil.

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