Environment-friendly wear-resistant lubricating oil and preparation method thereof

Abstract

The application belongs to the technical field of lubricating oil, and particularly relates to an environment-friendly wear-resistant lubricating oil and a preparation method thereof. The environment-friendly wear-resistant lubricating oil comprises the following components in parts by weight: base oil 50-70 parts; poly-A olefin 60-80 parts; lanthanum dialkyldithiophosphate 2-4 parts; boron nitride@MoS2 composite material 0.5-1.5 parts; dimer acid and glycerol monooleate co-modified cerium oxide 1-3 parts; antioxidant 3-5 parts; preservative 2-4 parts; and silane coupling agent 1-3 parts. The environment-friendly wear-resistant lubricating oil prepared by the application has excellent wear resistance and relatively strong adaptability by adding the boron nitride@MoS2 composite material and cooperating with the modified cerium oxide and other materials.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of lubricating oil. More specifically, it relates to an environmentally friendly wear-resistant lubricating oil and a preparation method thereof. BACKGROUND

[0002] A large amount of heat is generated during the friction process, and the generation and dissipation of heat will waste a lot of energy, and the wear caused by friction will also cause the surface damage of mechanical parts, reduce the reliability and safety of mechanical devices. It is reported that friction and wear will cause one-third of the total energy on earth to be wasted, and about 80% of the damage of mechanical parts is caused by friction and wear, and the use of lubricants can greatly reduce friction and wear, and reduce energy waste.

[0003] Controlling friction can reduce wear and tear, improve lubrication performance, reduce energy consumption, and avoid the occurrence of such accidents, and has become an important measure to save energy and raw materials and shorten maintenance time. At the same time, the research on lubrication plays a very key role in improving product quality, increasing the service life and safety and reliability of mechanical equipment.

[0004] CN114836255A discloses a biodegradable composite lubricating oil and a preparation process thereof, the components of the composite lubricating oil include: by weight, modified wear-resistant material 4-6 parts, additive 3-4 parts, phosphoric acid 10-15 parts, n-octadecanol 15-18 parts, vegetable oil 30-40 parts, oleic acid surfactant 2-3 parts, antioxidant 2-3 parts, extreme pressure agent 2-3 parts, defoaming agent 1-2 parts, viscosity regulator 5-6 parts, water 15-20 parts; the vegetable oil includes castor oil and cottonseed oil, the mass ratio of the castor oil and the cottonseed oil is 1:1; the modified wear-resistant agent is an oil-soluble microsphere, which is mainly prepared from a silica-coated filler. The present application discloses a biodegradable composite lubricating oil and a preparation process thereof, the process design is reasonable, the operation is simple, the prepared lubricating oil has excellent anti-wear and friction-reducing performance, good lubrication performance, good storage stability, is biodegradable, does not damage the ecological environment, and is practical and environmentally friendly.

[0005] CN114032131A discloses an environmentally friendly anti-rust lubricating oil and a preparation method. It is composed of denatured base oil, dispersant, antioxidant, anti-wear agent, defoaming agent and viscosity regulator; wherein the preparation raw materials of the denatured base oil are base oil, denaturant and carboxylate. The present application provides an environmentally friendly anti-rust lubricating oil and a preparation method thereof, which has good properties such as environmental protection, easy degradation, wear resistance and rust prevention.

[0006] CN114517118A discloses a graphdiyne lubricating oil composition and a preparation method thereof. The graphdiyne lubricating oil composition provided by the application has excellent extreme pressure and wear resistance; the use amount of the pungent sulfur alkene can be reduced by adding graphdiyne as an extreme pressure and wear resistance additive to the lubricating oil; the lubricating oil product has excellent extreme pressure bearing and wear resistance, and is green and environmentally friendly; the graphdiyne lubricating oil composition is suitable for vehicle gear oil, industrial gear oil, diesel engine oil, gasoline engine oil, hydraulic oil and the like; and the production process of the graphdiyne lubricating oil composition is simple and convenient to operate, and solves the dispersion problem of graphdiyne in the lubricating oil.

[0007] CN113046153A discloses a biodegradable composite lubricating oil and a preparation process thereof. The composite lubricating oil comprises, by weight, 4-6 parts of modified wear-resistant material, 3-4 parts of additive, 10-15 parts of phosphoric acid, 15-18 parts of n-octadecanol, 30-40 parts of vegetable oil, 2-3 parts of oleic acid surfactant, 2-3 parts of antioxidant, 2-3 parts of extreme pressure agent, 1-2 parts of defoaming agent, 5-6 parts of viscosity regulator, and 15-20 parts of water. The vegetable oil comprises castor oil and cottonseed oil, and the mass ratio of the castor oil to the cottonseed oil is 1:1. The modified wear-resistant agent is an oil-soluble microsphere mainly prepared from a silica-coated filler. The application discloses a biodegradable composite lubricating oil and a preparation process thereof. The process design is reasonable, the operation is simple, the prepared lubricating oil has excellent anti-wear and friction-reducing performance, good lubricating performance, and good storage stability, is biodegradable, does not damage the ecological environment, and is practical and environmentally friendly.

[0008] CN111303974A discloses a wear-resistant ecological and environmentally-friendly lubricating oil, which comprises the following components in parts by weight: base oil 50-60 parts, single-end epoxy group polyether modified amine group hyperbranched polyester 10-20 parts, single-end hydroxypropyl silicone oil modified black phosphorus 3-7 parts, boronized silicon 0.5-1.5 parts, coupling agent 0.2-0.5 parts, viscosity agent 0.5-1.3 parts, dispersant 0.2-0.6 parts, and antioxidant 0.4-1 part. The application also discloses a preparation method of the wear-resistant ecological and environmentally-friendly lubricating oil. The wear-resistant ecological and environmentally-friendly lubricating oil disclosed by the application has good lubricating effect, excellent compression resistance and wear resistance, and excellent stability, and is safe and environmentally friendly to use.

[0009] By adding wear-resistant materials or additives to base oil, the wear resistance of the lubricating oil can be improved. The application provides an environmentally-friendly wear-resistant lubricating oil, which has excellent wear resistance and strong adaptability. SUMMARY

[0010] The technical problem solved by the present application is to overcome the defects and deficiencies of the prior art and provide an environment-friendly wear-resistant lubricating oil and a preparation method thereof. The environment-friendly wear-resistant lubricating oil comprises the following components in parts by weight: base oil 50-70 parts; poly-A olefin 60-80 parts; lanthanum dialkyldithiophosphate 2-4 parts; boron nitride@MoS2 composite material 0.5-1.5 parts; dimer acid and monooctanoic acid glyceride co-modified cerium oxide 1-3 parts; antioxidant 3-5 parts; preservative 2-4 parts; and silane coupling agent 1-3 parts.

[0011] The present application aims to provide an environment-friendly wear-resistant lubricating oil.

[0012] The present application further aims to provide a preparation method of the environment-friendly wear-resistant lubricating oil.

[0013] The above-mentioned objects of the present application are achieved by the following technical solutions.

[0014] An environment-friendly wear-resistant lubricating oil comprises the following components in parts by weight:

[0015] Base oil 50-70 parts;

[0016] Poly-A olefin 60-80 parts;

[0017] Lanthanum dialkyldithiophosphate 2-4 parts;

[0018] Boron nitride@MoS2 composite material 0.5-1.5 parts;

[0019] Dimer acid and monooctanoic acid glyceride co-modified cerium oxide 1-3 parts;

[0020] Antioxidant 3-5 parts;

[0021] Preservative 2-4 parts;

[0022] Silane coupling agent 1-3 parts.

[0023] Preferably, the base oil is castor oil; and the poly-A olefin is PAO4.

[0024] Further preferably, the antioxidant is any one of bis-octyl diphenylamine, butyl octyl diphenylamine and dinonyl diphenylamine; the preservative is any one of phenothiazine, bis-salicylidene propylenediamine and sodium benzoate; and the silane coupling agent is one of KH-550, KH-560 and KH-570.

[0025] In the present application, the preparation method of the boron nitride@MoS2 composite material comprises the following steps:

[0026] The hexagonal boron nitride, the molybdenum source and the sulfur source are ultrasonically dispersed into deionized water, and then transferred into a hydrothermal reaction kettle for hydrothermal reaction, cooled to room temperature, washed, vacuum dried to obtain the boron nitride@MoS2 composite material.

[0027] Preferably, the sulfur source is thiourea; the molybdenum source is ammonium molybdate; and the ratio of the hexagonal boron nitride, the molybdenum source and the sulfur source is 10g:8-12mmol:24-30mmol.

[0028] Further preferably, the hydrothermal reaction is carried out at 160-200℃ for 18-24h; and the vacuum drying is carried out at 70-90℃ for 10-20h.

[0029] In the present application, the further preferred technical solution, the preparation method of the dimer acid and glycerol monooleate co-modified cerium oxide comprises the following steps:

[0030] The dimer acid, the glycerol monooleate and the cerium oxide are added into a ball mill for ball milling to obtain the dimer acid and glycerol monooleate co-modified cerium oxide.

[0031] Preferably, the mass ratio of the dimer acid, the glycerol monooleate and the cerium oxide is 0.4-0.8:0.3-0.7:45.

[0032] Further preferably, the ball milling is carried out at a rotation speed of 500-700rpm for 8-12h.

[0033] Based on the above-mentioned preparation method of the environment-friendly wear-resistant lubricating oil, the preparation method comprises the following steps:

[0034] The base oil, the boron nitride@MoS2 composite material, the silane coupling agent, the antioxidant, the preservative are stirred and mixed at 50-70℃ for 2-4h, and then the poly A olefin, the lanthanum dialkyldithiophosphate and the dimer acid and glycerol monooleate co-modified cerium oxide are added, and the stirring is continued for 1-3h to obtain the environment-friendly wear-resistant lubricating oil.

[0035] The present application has the following beneficial effects:

[0036] The hexagonal boron nitride layer material is compounded with molybdenum sulfide, and intracrystalline slip occurs under a lower shear stress, and the layer between the layers is easy to move and spread on the contact surface of the friction pair in the friction process, thereby the friction reduction performance is synergistically enhanced. The dimer acid and glycerol monooleate are compounded and modified to cerium oxide, the compatibility of the cerium oxide with the base oil is enhanced, the dispersibility of the cerium oxide is improved, and the wear resistance and the anti-wear performance of the lubricating oil are improved. The environment-friendly wear-resistant lubricating oil prepared by the present application has excellent wear resistance and strong adaptability. DETAILED DESCRIPTION

[0037] The application will be further described in connection with the specific embodiments. These embodiments do not intend to limit the application in any manner. Unless otherwise specified, the reagents, methods and devices used in the following examples are the conventional reagents, methods and devices in the art.

[0038] The base oil is castor oil; the poly A olefin is PAO4.

[0039] Unless otherwise specified, the reagents and materials used in the following examples are commercially available.

[0040] Example 1

[0041] An environmentally friendly wear-resistant lubricating oil comprises, by weight parts, the following components:

[0042] 60 parts of base oil;

[0043] 70 parts of poly A olefin;

[0044] 3 parts of lanthanum dialkyldithiophosphate;

[0045] 1 part of boron nitride@MoS2 composite material;

[0046] 2 parts of dimer acid and glycerol monooleate co-modified cerium oxide;

[0047] 4 parts of antioxidant; the antioxidant is butyl octyl diphenylamine;

[0048] 3 parts of preservative; the preservative is bis-salicylpropylenediamine;

[0049] 2 parts of silane coupling agent; the silane coupling agent is KH-560;

[0050] The preparation method of the boron nitride@MoS2 composite material comprises the following steps:

[0051] 10g of hexagonal boron nitride, 10mmol of ammonium molybdate and 28mmol of thiourea are ultrasonically dispersed into 200mL of deionized water, then transferred into a hydrothermal reaction kettle, reacted at 180℃ for 20h, cooled to room temperature, washed, and dried at 80℃ under vacuum for 16h to obtain a boron nitride@MoS2 composite material;

[0052] The preparation method of the dimer acid and glycerol monooleate co-modified cerium oxide comprises the following steps:

[0053] 0.6g of dimer acid, 0.5g of glycerol monooleate and 45g of cerium oxide are added to a ball mill, then ball milled at a rotation speed of 600rpm for 10h to obtain dimer acid and glycerol monooleate co-modified cerium oxide;

[0054] A preparation method of an environmentally friendly wear-resistant lubricating oil, the preparation method comprises the following steps:

[0055] The base oil, boron nitride@MoS2 composite material, silane coupling agent, antioxidant, preservative are mixed at 60°C for 3h, then polyA olefin, lanthanum dialkyldithiophosphate and dimer acid and monoglyceride co-modified cerium oxide are added, and stirring is continued for 2h to obtain an environmentally friendly wear-resistant lubricating oil.

[0056] Example 2

[0057] An environmentally friendly wear-resistant lubricating oil comprises, by weight parts, the following components:

[0058] 70 parts of base oil;

[0059] 60 parts of polyA olefin;

[0060] 4 parts of lanthanum dialkyldithiophosphate;

[0061] 0.5 parts of boron nitride@MoS2 composite material;

[0062] 3 parts of dimer acid and monoglyceride co-modified cerium oxide;

[0063] 3 parts of antioxidant; the antioxidant is bis-octyl diphenylamine;

[0064] 4 parts of preservative; the preservative is sodium benzoate;

[0065] 1 part of silane coupling agent; the silane coupling agent is KH-550;

[0066] The preparation method of the boron nitride@MoS2 composite material comprises the following steps:

[0067] 10g of hexagonal boron nitride, 12mmol of ammonium molybdate and 24mmol of thiourea are ultrasonically dispersed into 200mL of deionized water, then transferred into a hydrothermal reaction kettle, reacted at 200°C for 18h, cooled to room temperature, washed, and vacuum dried at 90°C for 10h to obtain a boron nitride@MoS2 composite material;

[0068] The preparation method of the dimer acid and monoglyceride co-modified cerium oxide comprises the following steps:

[0069] 0.8g of dimer acid, 0.3g of monoglyceride and 45g of cerium oxide are added to a ball mill, then ball milled at a rotation speed of 700rpm for 8h to obtain dimer acid and monoglyceride co-modified cerium oxide;

[0070] A preparation method of an environmentally friendly wear-resistant lubricating oil, the preparation method comprises the following steps:

[0071] The base oil, boron nitride@MoS2 composite material, silane coupling agent, antioxidant, preservative are mixed at 70℃ for 2h, then poly A olefin, lanthanum dialkyldithiophosphate and dimer acid and monoglyceride oleic acid co-modified cerium oxide are added, and stirring is continued for 1h to obtain an environmentally friendly wear-resistant lubricating oil.

[0072] Example 3

[0073] An environmentally friendly wear-resistant lubricating oil comprises the following components by weight:

[0074] 50 parts of base oil;

[0075] 80 parts of poly A olefin;

[0076] 2 parts of lanthanum dialkyldithiophosphate;

[0077] 1.5 parts of boron nitride@MoS2 composite material;

[0078] 1 part of dimer acid and monoglyceride oleic acid co-modified cerium oxide;

[0079] 5 parts of antioxidant; the antioxidant is dinonyl diphenylamine;

[0080] 2 parts of preservative; the preservative is phenothiazine;

[0081] 3 parts of silane coupling agent; the silane coupling agent is KH-570;

[0082] The preparation method of the boron nitride@MoS2 composite material comprises the following steps:

[0083] 10g of hexagonal boron nitride, 8mmol of ammonium molybdate and 30mmol of thiourea are ultrasonically dispersed into 200mL of deionized water, then transferred into a hydrothermal reaction kettle, and reacted at 160℃ for 24h; cooled to room temperature, washed, and vacuum dried at 70℃ for 20h to obtain a boron nitride@MoS2 composite material;

[0084] The preparation method of the dimer acid and monoglyceride oleic acid co-modified cerium oxide comprises the following steps:

[0085] 0.4g of dimer acid, 0.7g of monoglyceride oleic acid and 45g of cerium oxide are added to a ball mill, then ball milled at a rotation speed of 500rpm for 12h to obtain dimer acid and monoglyceride oleic acid co-modified cerium oxide;

[0086] A preparation method of an environmentally friendly wear-resistant lubricating oil, the preparation method comprises the following steps:

[0087] The base oil, boron nitride@MoS2 composite material, silane coupling agent, antioxidant, preservative are mixed at 50 DEG C for 4h under stirring, then poly A olefin, lanthanum dialkyldithiophosphate and dimer acid and glycerol monooleate co-modified cerium oxide are added and stirring is continued for 3h, to obtain the environment-friendly wear-resistant lubricating oil.

[0088] Comparative Example 1

[0089] Comparative Example 1 is basically same as Example 1 except that equal amount of hexagonal boron nitride is used instead of boron nitride@MoS2 composite material.

[0090] Comparative Example 2

[0091] Comparative Example 2 is basically same as Example 1 except that equal amount of glycerol monooleate modified cerium oxide is used instead of dimer acid and glycerol monooleate co-modified cerium oxide. The preparation method of the glycerol monooleate modified cerium oxide comprises the following steps:

[0092] 1.1g of glycerol monooleate and 45g of cerium oxide are added into a ball mill, then ball milling is carried out at a rotating speed of 600rpm for 10h to obtain the glycerol monooleate modified cerium oxide;

[0093] Comparative Example 3

[0094] Comparative Example 3 is basically same as Example 1 except that equal amount of lanthanum dialkyldithiophosphate is used instead of boron nitride@MoS2 composite material.

[0095] Comparative Example 4

[0096] Comparative Example 4 is basically same as Example 1 except that equal amount of dimer acid and glycerol monooleate co-modified cerium oxide is used instead of boron nitride@MoS2 composite material.

[0097] The performance of Examples 1-3 and Comparative Examples 1-4 is tested, and the specific test results are shown in Table 1:

[0098] Among them, the four-ball friction and wear tester is used to test the friction coefficient and wear scar diameter under the conditions specified in ASTM D4172 and SH / T0189 (under load 392N, rotating speed 1200r / min, temperature 75 DEG C, time 60min) to characterize the anti-wear and friction-reducing ability of the lubricating oil.

[0099] Table 1:

[0100] coefficient of friction wear scar diameter (mm) example 1 0.056 0.220 example 2 0.061 0.259 example 3 0.059 0.244 comparative example 1 0.066 0.299 comparative example 2 0.064 0.281 comparative example 3 0.074 0.372 comparative example 4 0.071 0.349

[0101] It can be seen from the comparison of the examples and the comparative examples that the environment-friendly wear-resistant lubricating oil prepared in the application has excellent wear resistance.

[0102] The above embodiments are the preferred embodiments of the present application, but the embodiments of the present application are not limited to the above embodiments, and any changes, modifications, substitutions, combinations, simplifications, etc. made without departing from the spirit and principles of the present application should be equivalent replacement manners and should be included in the protection scope of the present application.

Claims

1. An environmentally friendly, wear-resistant lubricating oil, characterized in that: By weight, it includes the following components: 50-70 parts base oil; 60-80 parts of polyalphaolefin; 2-4 parts of dialkyl dithiophosphate lanthanum; 0.5–1.5 parts of boron nitride@MoS2 composite material; 1-3 parts of cerium oxide were co-modified with dimer acid and glyceryl monooleate; Antioxidant 3-5 parts; 2-4 parts preservative; 1-3 parts of silane coupling agent; The preparation method of the cerium oxide co-modified by dimer acid and monooleic glycerol ester includes the following steps: adding dimer acid, monooleic glycerol ester and cerium oxide to a ball mill for ball milling to obtain cerium oxide co-modified by dimer acid and monooleic glycerol ester; the mass ratio of dimer acid, monooleic glycerol ester and cerium oxide is 0.4-0.8:0.3-0.7:

45.

2. The environmentally friendly wear-resistant lubricating oil according to claim 1, characterized in that: The base oil is castor oil; the polyalphaolefin is PAO4.

3. The environmentally friendly wear-resistant lubricating oil according to claim 1, characterized in that: The antioxidant is any one of bis(octyl)diphenylamine, butyl(octyl)diphenylamine, and dinonyl(diphenyl)diphenylamine; the preservative is any one of phenothiazine, bis(salicyl)propanediamine, and sodium benzoate; and the silane coupling agent is any one of KH-550, KH-560, and KH-570.

4. The environmentally friendly wear-resistant lubricating oil according to claim 1, characterized in that: The preparation method of the boron nitride@MoS2 composite material includes the following steps: hexagonal boron nitride, molybdenum source and sulfur source are ultrasonically dispersed in deionized water, then transferred to a hydrothermal reactor for hydrothermal reaction, cooled to room temperature, washed and vacuum dried to obtain boron nitride@MoS2 composite material.

5. The environmentally friendly wear-resistant lubricating oil according to claim 4, characterized in that: The sulfur source is thiourea; the molybdenum source is ammonium molybdate; the ratio of hexagonal boron nitride, molybdenum source and sulfur source is 10g: 8-12mmol: 24-30mmol.

6. The environmentally friendly wear-resistant lubricating oil according to claim 4, characterized in that: The hydrothermal reaction conditions are: reaction at 160-200℃ for 18-24 hours; the vacuum drying is vacuum drying at 70-90℃ for 10-20 hours.

7. The environmentally friendly wear-resistant lubricating oil according to claim 1, characterized in that: The ball milling conditions are as follows: ball milling at a speed of 500-700 rpm for 8-12 hours.

8. A method for preparing an environmentally friendly wear-resistant lubricating oil according to any one of claims 1-7, characterized in that: The preparation method includes the following steps: base oil, boron nitride@MoS2 composite material, silane coupling agent, antioxidant, and preservative are stirred and mixed at 50-70°C for 2-4 hours, then polyalphaolefin, dialkyl dithiophosphate lanthanum, dimer acid and monooleate glycerol ester co-modified cerium oxide are added, and stirring is continued for 1-3 hours to obtain environmentally friendly wear-resistant lubricating oil.