CN112662451A - Lubricating oil additive and preparation method thereof - Google Patents
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Abstract
The invention discloses the technical field of lubricating oil, and provides a lubricating oil additive and a preparation method thereof, wherein the lubricating oil additive comprises the following components: base oil, preservative, detergent dispersant, pour point depressant, anti-foaming agent and antioxidant. According to the invention, graphene, molybdenum oxide and molybdenum disulfide which are subjected to ball milling, ultrasonic treatment and modification treatment are used as antioxidants of lubricating oil, the nano-scale antioxidants are dispersed in base oil and lubricating oil, the dispersing effect is better, the wear resistance is better, and the friction coefficient of the lubricating oil is reduced; and the modified graphene, molybdenum oxide and molybdenum disulfide have better lubricating effect and lipophilicity and can be better fused and dispersed with base oil and lubricating oil.
Description
Technical Field
The invention relates to the technical field of lubricating oil, in particular to a lubricating oil additive and a preparation method thereof.
Background
The fuel combustion efficiency and the lubrication abrasion condition of the automobile engine under the service condition have the most obvious influence on the energy consumption and the environmental protection problem of the automobile, and higher requirements on the lubrication performance and the long-term stability of the lubricating oil are provided. Frictional wear is a ubiquitous natural phenomenon, wear being one of the three most prominent forms of material and equipment damage and failure, and lubrication being the most effective technique to reduce friction, reduce or avoid wear.
The lubricating oil additive is one or more compounds added into the lubricant to enable the lubricant to obtain certain new characteristics or improve some existing characteristics in the lubricant, common lubricant additives comprise an antioxidant, a preservative, an anti-foaming agent and the like, but the existing lubricant additives have the problems of poor antioxidant performance and poor lubricating effect when in use.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a lubricating oil additive and a preparation method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme:
a lubricating oil additive comprises the following components in parts by weight: 30-35 parts of base oil, 10-15 parts of preservative, 12-18 parts of detergent dispersant, 4-9 parts of pour point depressant, 1-3 parts of anti-foaming agent and 6-9 parts of antioxidant; the preparation method of the antioxidant comprises the following steps: according to (18-27): (13-19): (12-18): (3-5) weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2-3h, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1-2h to obtain an antioxidant; the ultrasonic frequency in the antioxidant preparation process is 10MHz-20 MHz.
The preservative is one of barium sulfonate, calcium sulfonate, modified calcium sulfonate, amine borate and amine carboxylate; the pour point depressant is methyl dimethacrylate; the detergent dispersant is a polyisobutenyl succinimide derivative, and is selected from one or more of the following substances: mono alkenyl succinimide, polyisobutenyl succinimide, polyisobutylene polysuccinimide, high molecular weight polyisobutenyl succinimide.
The preparation method of the anti-foaming agent comprises the following steps: according to (1-3): (18-25) weighing the coupling agent and the silicone oil according to the weight ratio; pouring the silicone oil and the coupling agent into a mixing barrel and mixing for 0.5-1h at the rotating speed of 1000-1500r/min to obtain the anti-foaming agent.
A preparation method of a lubricating oil additive comprises the following steps:
step 1: pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution;
step 2: pouring the base oil, the dispersion liquid, the preservative, the pour point depressant, the anti-foaming agent and the antioxidant into a mixing barrel, mixing for 0.5-1h at a high rotating speed, and performing ultrasonic treatment on the materials in the mixing barrel while mixing to obtain the lubricating oil additive.
Graphene, molybdenum oxide and molybdenum disulfide are used as antioxidants of lubricating oil, the graphene, the molybdenum oxide and the molybdenum disulfide are dispersed into nano particles through a ball mill and ultrasonic treatment, and then the graphene, the molybdenum oxide and the molybdenum disulfide of the nano particles are subjected to modification treatment through a coupling agent to obtain modified graphene, modified molybdenum oxide and modified molybdenum disulfide which are used as the antioxidants, the nano-scale antioxidants are dispersed in base oil and the lubricating oil, the dispersing effect is better, the wear resistance is better, and the friction coefficient of the lubricating oil is reduced; and the modified graphene, molybdenum oxide and molybdenum disulfide have better lubricating effect and lipophilicity and can be better fused and dispersed with base oil and lubricating oil.
The modified silicone oil is used as an antifoaming agent, and is modified by a coupling agent, so that the antifoaming effect is better, the generation of foam is effectively inhibited, the speed of eliminating the foam is improved, the stable foam is prevented from being formed, the stable foam can be adsorbed on the foam, an unstable film is formed, and the purpose of destroying the foam is achieved. The lubricating performance of the lubricating oil is better, the oxidation speed is reduced, and the delivery and the quality of oil products are guaranteed.
In the preparation process of the additive, the antioxidant and the detergent dispersant are mixed and dispersed in advance, so that the detergent dispersant can further modify the modified graphene in the antioxidant, the lipophilicity of the modified graphene is improved, and the modified graphene can be fully and uniformly mixed with all components in the additive.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
The fuel combustion efficiency and the lubrication abrasion condition of the automobile engine under the service condition have the most obvious influence on the energy consumption and the environmental protection problem of the automobile, and higher requirements on the lubrication performance and the long-term stability of the lubricating oil are provided. Frictional wear is a ubiquitous natural phenomenon, wear being one of the three most prominent forms of material and equipment damage and failure, and lubrication being the most effective technique to reduce friction, reduce or avoid wear. The lubricating oil additive is one or more compounds added into the lubricant to enable the lubricant to obtain certain new characteristics or improve some existing characteristics in the lubricant, common lubricant additives comprise an antioxidant, a preservative, an anti-foaming agent and the like, but the existing lubricant additives have the problems of poor antioxidant performance and poor lubricating effect when in use. In order to solve the technical problems, the invention provides a lubricating oil additive which comprises the following components in parts by weight: 30-35 parts of base oil, 10-15 parts of preservative, 12-18 parts of detergent dispersant, 4-9 parts of pour point depressant, 1-3 parts of anti-foaming agent and 6-9 parts of antioxidant; the preparation method of the antioxidant comprises the following steps: according to (18-27): (13-19): (12-18): (3-5) weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2-3h, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture; and (3) introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1-2 hours to obtain the antioxidant.
In the embodiment of the invention, the lubricating oil additive comprises the following components in parts by weight: 30-35 parts of base oil, 10-15 parts of preservative, 12-18 parts of detergent dispersant, 4-9 parts of pour point depressant, 1-3 parts of anti-foaming agent and 6-9 parts of antioxidant;
the preparation method of the antioxidant comprises the following steps: according to (18-27): (13-19): (12-18): (3-5) weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2-3h, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture; and (3) introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1-2 hours to obtain the antioxidant.
According to the invention, graphene, molybdenum oxide and molybdenum disulfide are used as antioxidants of lubricating oil, the graphene, the molybdenum oxide and the molybdenum disulfide are dispersed into nano particles through a ball mill and ultrasonic treatment, and then the graphene, the molybdenum oxide and the molybdenum disulfide of the nano particles are subjected to modification treatment through a coupling agent to obtain modified graphene, modified molybdenum oxide and modified molybdenum disulfide which are used as the antioxidants, so that the nano-scale antioxidants are better in dispersion effect in base oil and lubricating oil, better in wear resistance and lower in friction coefficient of the lubricating oil; and the modified graphene, molybdenum oxide and molybdenum disulfide have better lubricating effect and lipophilicity and can be better fused and dispersed with base oil and lubricating oil.
In the invention, the modified silicone oil is used as an antifoaming agent, and the modified silicone oil obtained by modifying through a coupling agent has better antifoaming effect, effectively inhibits the generation of foam, improves the speed of eliminating the foam so as to avoid forming stable foam, and can be adsorbed on the foam to form an unstable film, thereby achieving the purpose of destroying the foam. The lubricating performance of the lubricating oil is better, the oxidation speed is reduced, and the delivery and the quality of oil products are guaranteed.
In the preparation process of the additive, the antioxidant and the detergent dispersant are mixed and dispersed in advance, so that the detergent dispersant can further modify modified graphene in the antioxidant, the lipophilicity of the modified graphene is improved, and the modified graphene can be fully and uniformly mixed with all components in the additive.
The technical effects of the lubricating oil additive and the preparation method thereof of the present invention will be further described with reference to the following specific examples, but the specific implementation methods mentioned in these examples are only illustrative and explanatory of the technical solution of the present invention, and do not limit the implementation scope of the present invention, and all modifications and substitutions based on the above principles should be within the protection scope of the present invention.
Example 1
According to the following steps of 18: 13: 12: 3, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 10 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1h to obtain an antioxidant;
according to the following steps of 1: 18, weighing the coupling agent and the silicone oil according to the weight ratio; pouring silicone oil and a coupling agent into a mixing barrel, and mixing for 0.5h at the rotating speed of 1000r/min to obtain an antifoaming agent;
weighing the following components in parts by weight: 30 parts of base oil, 10 parts of barium sulfonate, 12 parts of monoalkenyl succinimide, 4 parts of methyl dimethacrylate, 1 part of an antifoaming agent and 6 parts of an antioxidant;
pouring the antioxidant and the monoalkenyl succinimide into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersion to obtain a dispersion; and pouring the base oil, the dispersion liquid, the barium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 0.5h at a high rotation speed of 1500r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing, wherein the ultrasonic frequency is 10MHz, so as to obtain the lubricating oil additive.
Example 2
According to the following steps of 18: 13: 12: 3, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 10 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1h to obtain an antioxidant;
according to the following steps of 1: 18, weighing the coupling agent and the silicone oil according to the weight ratio; pouring silicone oil and a coupling agent into a mixing barrel, and mixing for 0.5h at the rotating speed of 1000r/min to obtain an antifoaming agent;
mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent;
weighing the following components in parts by weight: 31 parts of base oil, 11 parts of calcium sulfonate, 13 parts of detergent dispersant, 5 parts of methyl dimethacrylate, 1.5 parts of antifoaming agent and 6.5 parts of antioxidant;
pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution; and pouring the base oil, the dispersion liquid, the calcium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 0.5h at a high rotation speed of 1500r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing, wherein the ultrasonic frequency is 10MHz, so as to obtain the lubricating oil additive.
Example 3
According to the following steps of 22: 16: 15: 4, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2.5h, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 15 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1.5 hours to obtain an antioxidant;
according to the following steps: 21, weighing the coupling agent and the silicone oil according to the weight ratio; pouring silicone oil and a coupling agent into a mixing barrel, and mixing for 0.75h at the rotating speed of 1250r/min to obtain an antifoaming agent;
weighing the following components in parts by weight: 33 parts of base oil, 13 parts of barium sulfonate, 15 parts of monoalkenyl succinimide, 6 parts of methyl dimethacrylate, 2 parts of an antifoaming agent and 7.5 parts of an antioxidant;
pouring the antioxidant and the monoalkenyl succinimide into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersion to obtain a dispersion; and pouring the base oil, the dispersion liquid, the barium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 0.75h at a high rotation speed of 1750r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing, wherein the ultrasonic frequency is 15MHz, so as to obtain the lubricating oil additive.
Example 4
According to 27: 19: 18: 5, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 3 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 20 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 2 hours to obtain an antioxidant;
according to the following steps of 3: 25 of coupling agent and silicone oil; pouring silicone oil and a coupling agent into a mixing barrel, and mixing at a rotating speed of 1500r/min for 1h to obtain an antifoaming agent;
mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent;
weighing the following components in parts by weight: 34 parts of base oil, 14 parts of calcium sulfonate, 17 parts of detergent dispersant, 8 parts of methyl dimethacrylate, 2.5 parts of antifoaming agent and 8.5 parts of antioxidant;
pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution; and pouring the base oil, the dispersion liquid, the calcium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing uniformly, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
Example 5
According to 27: 19: 18: 5, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 3 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 20 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 2 hours to obtain an antioxidant;
according to the following steps of 3: 25 of coupling agent and silicone oil; pouring silicone oil and a coupling agent into a mixing barrel, and mixing at a rotating speed of 1500r/min for 1h to obtain an antifoaming agent;
weighing the following components in parts by weight: 35 parts of base oil, 15 parts of barium sulfonate, 18 parts of monoalkenyl succinimide, 9 parts of methyl dimethacrylate, 3 parts of an antifoaming agent and 9 parts of an antioxidant;
pouring the antioxidant and the monoalkenyl succinimide into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersion to obtain a dispersion; and pouring the base oil, the dispersion liquid, the barium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing uniformly, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
The lubricating oil additives prepared in examples 1 to 5 were mixed with a base lubricating oil in an addition amount of 1:9 to give five groups of lubricating oil compositions, and the performance of the five groups of lubricating oil compositions was tested. And the common lubricating oil additives on the market are selected as a control group, and the test results are shown in table 1:
table 1
In summary, it can be seen from table 1 that the lubricating oil compositions prepared in examples 1-5 all performed better than the control lubricating oil composition when applied to a lubricating oil, and the lubricating oil compositions had the best coefficient of friction when the lubricating oil additives prepared in example 4 were applied to a lubricating oil, which discloses that: according to 27: 19: 18: 5, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 3 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 20 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 2 hours to obtain an antioxidant; according to the following steps of 3: 25 of coupling agent and silicone oil; pouring silicone oil and a coupling agent into a mixing barrel, and mixing at a rotating speed of 1500r/min for 1h to obtain an antifoaming agent; mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent; weighing the following components in parts by weight: 34 parts of base oil, 14 parts of calcium sulfonate, 17 parts of detergent dispersant, 8 parts of methyl dimethacrylate, 2.5 parts of antifoaming agent and 8.5 parts of antioxidant; pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution; and pouring the base oil, the dispersion liquid, the calcium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing uniformly, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
Furthermore, the invention also makes systematic research on the process conditions in the lubricating oil additive and the preparation method thereof, and the following test schemes which only explain that the change of the process conditions has obvious influence on the effect of the lubricating oil additive are all based on the process conditions of the embodiment 4, and are specifically seen in comparative examples 1-4:
comparative example 1
According to 27: 19: weighing graphene, molybdenum oxide and molybdenum disulfide according to the weight ratio of 18, and mixing to obtain an antioxidant;
according to the following steps of 3: 25 of coupling agent and silicone oil; pouring silicone oil and a coupling agent into a mixing barrel, and mixing at a rotating speed of 1500r/min for 1h to obtain an antifoaming agent;
mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent;
weighing the following components in parts by weight: 34 parts of base oil, 14 parts of calcium sulfonate, 17 parts of detergent dispersant, 8 parts of methyl dimethacrylate, 2.5 parts of antifoaming agent and 8.5 parts of antioxidant;
pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution; and pouring the base oil, the dispersion liquid, the calcium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing uniformly, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
Comparative example 2
According to 27: 19: 18: 5, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 3 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 20 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 2 hours to obtain an antioxidant;
mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent;
weighing the following components in parts by weight: 34 parts of base oil, 14 parts of calcium sulfonate, 17 parts of detergent dispersant, 8 parts of methyl dimethacrylate, 2.5 parts of silicone oil and 8.5 parts of antioxidant;
pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution; and pouring the base oil, the dispersion liquid, the calcium sulfonate, the methyl dimethacrylate, the silicone oil and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing uniformly, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
Comparative example 3
According to 27: 19: weighing graphene, molybdenum oxide and molybdenum disulfide according to the weight ratio of 18, and mixing to obtain an antioxidant;
mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent;
weighing the following components in parts by weight: 34 parts of base oil, 14 parts of calcium sulfonate, 17 parts of detergent dispersant, 8 parts of methyl dimethacrylate, 2.5 parts of silicone oil and 8.5 parts of antioxidant;
pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution; and pouring the base oil, the dispersion liquid, the calcium sulfonate, the methyl dimethacrylate, the silicone oil and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing uniformly, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
Comparative example 4
According to 27: 19: 18: 5, weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 3 hours, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture, wherein the ultrasonic frequency is 20 MHz; introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 2 hours to obtain an antioxidant;
according to the following steps of 3: 25 of coupling agent and silicone oil; pouring silicone oil and a coupling agent into a mixing barrel, and mixing at a rotating speed of 1500r/min for 1h to obtain an antifoaming agent;
mono-alkenyl succinimide, poly-isobutenyl succinimide according to 1: 1 to obtain a clean dispersing agent;
weighing the following components in parts by weight: 34 parts of base oil, 14 parts of calcium sulfonate, 17 parts of detergent dispersant, 8 parts of methyl dimethacrylate, 2.5 parts of antifoaming agent and 8.5 parts of antioxidant;
and pouring the base oil, the antioxidant, the detergent dispersant, the calcium sulfonate, the methyl dimethacrylate, the antifoaming agent and the antioxidant into a mixing barrel, mixing for 1h at a high rotating speed of 2000r/min, and carrying out ultrasonic treatment on the materials in the mixing barrel while mixing, wherein the ultrasonic frequency is 20MHz, so as to obtain the lubricating oil additive.
Comparative examples 1-4 the lubricating oil additives prepared in accordance with the present invention were mixed with a base lubricating oil in an amount of 1:9 to provide five lubricating oil compositions, and the performance of the five lubricating oil compositions was tested, the results of which are shown in table 2 below:
TABLE 2
In summary, as can be seen from table 2, after the lubricating oil additives prepared in comparative examples 1 to 4 are applied to lubricating oil, the performance of the lubricating oil composition is inferior to that of the lubricating oil composition in example 4, wherein in comparative example 1, graphene, molybdenum oxide and molybdenum disulfide are selected as antioxidants, and are not subjected to ball milling, ultrasonic dispersion and modification treatment, so that the dispersing effect of the antioxidants in base oil and lubricating oil is poor, the wear resistance is reduced, and the friction coefficient of the lubricating oil is increased; comparative example 2 common silicone oil is selected as an antifoaming agent, and the antifoaming effect is general; in the comparative example 3, graphene, molybdenum oxide and molybdenum disulfide which are not subjected to ball milling, ultrasonic dispersion and modification treatment are selected as antioxidants, and common silicone oil is selected as an antifoaming agent; comparative example 4 the antioxidant and the detergent dispersant were not previously subjected to a mixing dispersion treatment at the time of preparing the additive.
In summary, in the lubricating oil additive and the preparation method thereof provided in this embodiment, graphene, molybdenum oxide, and molybdenum disulfide are used as the antioxidant of the lubricating oil, the graphene, molybdenum oxide, and molybdenum disulfide are dispersed into nanoparticles through ball milling and ultrasonic treatment, and then the graphene, molybdenum oxide, and molybdenum disulfide of the nanoparticles are modified through a coupling agent to obtain modified graphene, modified molybdenum oxide, and modified molybdenum disulfide as the antioxidant, the nano-scale antioxidant is dispersed in the base oil and the lubricating oil with better dispersion effect and better wear resistance, and the friction coefficient of the lubricating oil is reduced; and the modified graphene, molybdenum oxide and molybdenum disulfide have better lubricating effect and lipophilicity and can be better fused and dispersed with base oil and lubricating oil.
The modified silicone oil is used as an antifoaming agent, and is modified by a coupling agent, so that the antifoaming effect is better, the generation of foam is effectively inhibited, the speed of eliminating the foam is improved, the stable foam is prevented from being formed, the stable foam can be adsorbed on the foam, an unstable film is formed, and the purpose of destroying the foam is achieved. The lubricating performance of the lubricating oil is better, the oxidation speed is reduced, and the delivery and the quality of oil products are guaranteed.
In the preparation process of the additive, the antioxidant and the detergent dispersant are mixed and dispersed in advance, so that the detergent dispersant can further modify the modified graphene in the antioxidant, the lipophilicity of the modified graphene is improved, and the modified graphene can be fully and uniformly mixed with all components in the additive.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The lubricating oil additive is characterized by comprising the following components in parts by weight: 30-35 parts of base oil, 10-15 parts of preservative, 12-18 parts of detergent dispersant, 4-9 parts of pour point depressant, 1-3 parts of anti-foaming agent and 6-9 parts of antioxidant;
the preparation method of the antioxidant comprises the following steps: according to (18-27): (13-19): (12-18): (3-5) weighing graphene, molybdenum oxide, molybdenum disulfide and a coupling agent according to the weight ratio; mixing graphene, molybdenum oxide and molybdenum disulfide, introducing the mixture into a ball mill, mixing and ball-milling for 2-3h, and then placing the mixture under ultrasonic to oscillate and disperse the mixture into nano particles to obtain a nano mixture; and (3) introducing the nano mixture and the coupling agent into a stirring barrel, and stirring for 1-2 hours to obtain the antioxidant.
2. The additive according to claim 1, wherein the preservative is one of barium sulfonate, calcium sulfonate, modified calcium sulfonate, amine borate, and amine carboxylate.
3. The lubricant additive of claim 1, wherein the pour point depressant is methyl dimethacrylate; the detergent dispersant is a polyisobutenyl succinimide derivative, and is selected from one or more of the following substances: mono alkenyl succinimide, polyisobutenyl succinimide, polyisobutylene polysuccinimide, high molecular weight polyisobutenyl succinimide.
4. The lubricant additive of claim 1, wherein the ultrasonic frequency during the antioxidant preparation is in the range of 10MHz to 20 MHz.
5. The lubricating oil additive according to claim 1, wherein the anti-foaming agent is prepared by a method comprising the steps of: according to (1-3): (18-25) weighing the coupling agent and the silicone oil according to the weight ratio; pouring the silicone oil and the coupling agent into a mixing barrel and mixing for 0.5-1h at the rotating speed of 1000-1500r/min to obtain the anti-foaming agent.
6. The lubricating oil additive as claimed in claim 1, which consists of, in parts by weight: 31-34 parts of base oil, 11-14 parts of preservative, 13-17 parts of detergent dispersant, 5-8 parts of pour point depressant, 1.5-2.5 parts of anti-foaming agent and 6.5-8.5 parts of antioxidant.
7. The lubricating oil additive as claimed in claim 1, which consists of, in parts by weight: 33 parts of base oil, 13 parts of preservative, 15 parts of detergent dispersant, 6 parts of pour point depressant, 2 parts of anti-foaming agent and 7.5 parts of antioxidant.
8. The process for preparing a lubricating oil additive according to any of claims 1 to 7, comprising the steps of:
step 1: pouring the antioxidant and the clean dispersing agent into a mixing barrel, mechanically stirring to obtain a mixed solution, and mechanically stripping the dispersing solution to obtain a dispersing solution;
step 2: pouring the base oil, the dispersion liquid, the preservative, the pour point depressant, the anti-foaming agent and the antioxidant into a mixing barrel, mixing for 0.5-1h at a high rotating speed, and performing ultrasonic treatment on the materials in the mixing barrel while mixing to obtain the lubricating oil additive.
9. The method as claimed in claim 8, wherein the high rotation speed in step 2 is 1500-2000 r/min.
10. The method for preparing the lubricating oil additive according to claim 9, wherein the ultrasonic frequency in the ultrasonic treatment in the step 2 is 10MHz-20 MHz.
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