CN111662761A - High-performance graphene lubricating improvement additive and preparation process thereof - Google Patents
High-performance graphene lubricating improvement additive and preparation process thereof Download PDFInfo
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- CN111662761A CN111662761A CN201910170686.1A CN201910170686A CN111662761A CN 111662761 A CN111662761 A CN 111662761A CN 201910170686 A CN201910170686 A CN 201910170686A CN 111662761 A CN111662761 A CN 111662761A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M125/00—Lubricating compositions characterised by the additive being an inorganic material
- C10M125/02—Carbon; Graphite
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/194—After-treatment
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/182—Graphene
- C01B32/198—Graphene oxide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M163/00—Lubricating compositions characterised by the additive being a mixture of a compound of unknown or incompletely defined constitution and a non-macromolecular compound, each of these compounds being essential
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/04—Elements
- C10M2201/041—Carbon; Graphite; Carbon black
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2203/00—Organic non-macromolecular hydrocarbon compounds and hydrocarbon fractions as ingredients in lubricant compositions
- C10M2203/06—Well-defined aromatic compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2215/00—Organic non-macromolecular compounds containing nitrogen as ingredients in lubricant compositions
- C10M2215/28—Amides; Imides
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2219/00—Organic non-macromolecular compounds containing sulfur, selenium or tellurium as ingredients in lubricant compositions
- C10M2219/08—Thiols; Sulfides; Polysulfides; Mercaptals
- C10M2219/082—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms
- C10M2219/087—Thiols; Sulfides; Polysulfides; Mercaptals containing sulfur atoms bound to acyclic or cycloaliphatic carbon atoms containing hydroxy groups; Derivatives thereof, e.g. sulfurised phenols
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
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- Nanotechnology (AREA)
- Lubricants (AREA)
Abstract
The invention relates to the field of graphene materials, in particular to a high-performance graphene lubricating improvement additive and a preparation process thereof; the modified graphene oxide modified graphene oil comprises 6-8% of modified graphene oxide, 3-5% of dispersing agent and 87-92% of lubricating oil, wherein the sum of the content of all raw materials is 100%; the dispersant comprises 12 to 45 percent of polyisobutylene-poly-succinimide, 4 to 36 percent of 4, 4-thiobis (2, 6-di-tert-butyl-p-cresol), 7 to 15 percent of heavy alkylbenzene synthetic oil and 13 to 34 percent of polyisobutylene-mono-succinimide; during preparation, the modified graphene oxide and the dispersing agent are mixed into lubricating oil to form graphene lubricating improvement additive slurry; and finally, grinding and packaging to obtain the graphene lubricating improvement additive. The graphene lubricating oil composition can stably disperse graphene in the shelf life, separation and layering do not occur, and the graphene lubricating oil composition has excellent dispersion stability.
Description
Technical Field
The invention relates to the field of graphene materials, and relates to a high-performance graphene lubricating improvement additive and a preparation process thereof.
Background
Frictional wear is commonly existing in nature, primary energy loss in the world reaches more than 30 percent due to the frictional wear, and the wear is one of the main reasons for scrapping materials and equipment. In order to reduce friction and abrasion, lubricating oil is added between workpieces, but the friction and abrasion still cause billions of yuan of economic loss to the country every year. Thus, friction reduction, wear reduction, and machine element life extension are constantly sought goals by tribology, chemistry, and materials researchers. In order to improve the lubricating properties of lubricating oils, various antiwear and antifriction additives are generally added to the base oil. At present, the antiwear and antifriction additives mainly belong to two categories, one is an oil-soluble additive, and the other is a solid additive. Graphene in the solid additive is an investigation hotspot for improving lubricating performance of the lubricating oil because of the characteristics of ultrathin, tough, compact and extremely wear-resistant property. Smaller graphite alkene particle can fill in the vice surface damage position of friction, plays the repair to the friction pair, replaces the friction of metal for the friction between the graphite alkene, reduces coefficient of friction, and graphite alkene inlays in the vice surface of friction in addition, can play fine guard action to the friction pair, effectively extension device life.
The research on the improvement of the anti-wear and anti-friction performance of the lubricating oil by adding the graphene serving as the lubricating oil additive into the lubricating oil is mainly to modify the molecular structure of the graphene or the graphene oxide so as to change the dispersibility of the graphene in a solvent. But the dispersion performance is still low, so that the large-scale application of the graphene in the lubricating oil is greatly limited.
Disclosure of Invention
Aiming at the defects of the technical problems, the invention provides a high-performance graphene lubricating improvement additive and a preparation process thereof.
The invention adopts the following technical scheme for solving the technical problems:
the high-performance graphene lubricating and improving additive is characterized by comprising the following raw materials in percentage by mass:
6-8% of modified graphene oxide, 3-5% of a dispersant and 87-92% of lubricating oil, wherein the sum of the content of the raw materials is 100%; the dispersant comprises 12-45% of polyisobutylene-poly-succinimide, 4-4, 4-thiobis (2, 6-di-tert-butyl-p-cresol) 4-36%, 7-15% of heavy alkylbenzene synthetic oil and 13-34% of polyisobutylene-mono-succinimide.
Preferably, the high-performance graphene lubricant improvement additive is characterized in that the high-performance graphene lubricant improvement additive comprises the following raw materials in percentage by mass:
8% of modified graphene oxide, 3% of a dispersant and 89% of lubricating oil, wherein the sum of the contents of the raw materials is 100%; the dispersant comprises 40% of polyisobutylene-poly-succinimide, 24% of 4, 4-thiobis (2, 6-di-tert-butyl-p-cresol), 10% of heavy alkylbenzene synthetic oil and 26% of polyisobutylene-mono-succinimide.
Preferably, the high-performance graphene lubricant improvement additive is characterized in that the particle size of the modified graphene oxide is 50-80 nm.
Preferably, the high-performance graphene lubricant improvement additive is characterized in that the lubricant comprises one or a combination of two or more of white oil, lubricant mineral base oil and lubricant total synthetic base oil.
Preferably, the high-performance graphene lubricating and improving additive is characterized in that the average molecular weight of the polyisobutylene-poly-succinimide is 2700-3000; the average molecular weight of the polyisobutylene-mono-succinimide is 1050-1250.
A preparation process of a high-performance graphene lubricating improvement additive is characterized by comprising the following steps:
s1, centrifuging the graphene oxide at a low speed to obtain supernatant, and then drying the supernatant at a low temperature to obtain graphene oxide powder;
step S2, forming a mixed solution of graphene oxide powder and sodium chloride crystals, drying, carbonizing, adding water, performing ultrasonic treatment, performing centrifugal washing, and finally drying to obtain graphene nanosheet powder;
s3, adding the graphene nanosheet powder into a sulfuric acid-nitric acid mixed acid system, performing ultrasonic treatment, centrifuging, washing and drying to obtain modified graphene oxide;
step S4, mixing the modified graphene oxide and a dispersing agent into lubricating oil to form graphene lubricating improvement additive slurry;
and step S5, grinding and packaging to obtain the graphene lubricating improvement additive.
Preferably, the preparation process of the high-performance graphene lubricant improvement additive is characterized in that in step S5, the grinding rate of the grinding treatment is 1500-5000 r/min, and the grinding time is 0.5-10 h.
The technical scheme has the following characteristics:
the high-performance graphene lubricating and improving additive and the preparation process thereof can ensure that graphene is stably dispersed without precipitation and delamination in the shelf life, and meanwhile, the graphene lubricating oil composition has the advantages of excellent dispersion stability, excellent anti-settling performance, simple preparation method and strong popularization.
Drawings
The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a flow chart of a preparation process of the high-performance graphene lubricant improvement additive according to the present invention.
Detailed Description
The invention will be further described with reference to the following drawings and specific examples, which are not intended to limit the invention thereto.
The invention discloses a high-performance graphene lubricating and improving additive which comprises the following raw materials in percentage by mass:
6-8% of modified graphene oxide, 3-5% of a dispersant and 87-92% of lubricating oil, wherein the sum of the content of the raw materials is 100%; the dispersant comprises 12-45% of polyisobutylene-poly-succinimide, 4-4, 4-thiobis (2, 6-di-tert-butyl-p-cresol) 4-36%, 7-15% of heavy alkylbenzene synthetic oil and 13-34% of polyisobutylene-mono-succinimide. In a specific embodiment, the following proportioning scheme is preferably adopted: 8% of modified graphene oxide, 3% of a dispersant and 89% of lubricating oil, wherein the sum of the contents of the raw materials is 100%; the dispersant comprises 40% of polyisobutylene-poly-succinimide, 24% of 4, 4-thiobis (2, 6-di-tert-butyl-p-cresol), 10% of heavy alkylbenzene synthetic oil and 26% of polyisobutylene-mono-succinimide.
Wherein the particle size of the modified graphene oxide is 50-80nm, and the lubricating oil comprises any one or the combination of more than two of white oil, lubricating oil mineral base oil and lubricating oil fully-synthetic base oil. The average molecular weight of the polyisobutylene-poly-succinimide is 2700-3000; the average molecular weight of the polyisobutylene-mono-succinimide is 1050-1250.
Aiming at the problems of difficult dispersion, poor stability and the like of graphene in lubrication, the specific embodiment provides a high-performance graphene lubrication improvement additive, which remarkably increases the stability of graphene in lubricating oil, and in order to realize the purpose, the process adopts the following technical scheme:
s1, centrifuging the graphene oxide at a low speed to obtain supernatant, and then drying the supernatant at a low temperature to obtain graphene oxide powder;
step S2, forming a mixed solution of graphene oxide powder and sodium chloride crystals, drying, carbonizing, adding water, performing ultrasonic treatment, performing centrifugal washing, and finally drying to obtain graphene nanosheet powder;
s3, adding the graphene nanosheet powder into a sulfuric acid-nitric acid mixed acid system, performing ultrasonic treatment, centrifuging, washing and drying to obtain modified graphene oxide;
step S4, mixing the modified graphene oxide and a dispersing agent into lubricating oil to form graphene lubricating improvement additive slurry;
and step S5, grinding and packaging to obtain the graphene lubricating improvement additive.
Wherein the grinding rate of the grinding treatment is 1500-5000 r/min, and the grinding time is 0.5-10 h.
The process comprises the steps of adding a certain amount of graphene powder into a sulfuric acid-nitric acid mixed acid system, carrying out ultrasonic treatment for a certain time, then carrying out centrifugal washing for multiple times by using water, and drying to obtain the surface-modified graphene powder, wherein the oxidation degree of the surface of the graphene powder can be controlled by controlling the ultrasonic treatment time.
Therefore, the high-performance graphene lubricating and improving additive and the preparation process thereof can ensure that graphene is stably dispersed in the shelf life and does not appear precipitation and delamination, and meanwhile, the graphene lubricating oil composition has the advantages of excellent dispersion stability, excellent anti-settling performance, simple preparation method and strong popularization.
The above description is of the preferred embodiment of the invention. It is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or modify equivalent embodiments, without affecting the spirit of the invention, using the methods and techniques disclosed above, without departing from the scope of the invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.
Claims (7)
1. The high-performance graphene lubricating and improving additive is characterized by comprising the following raw materials in percentage by mass:
6-8% of modified graphene oxide, 3-5% of a dispersant and 87-92% of lubricating oil, wherein the sum of the content of the raw materials is 100%; the dispersant comprises 12-45% of polyisobutylene-poly-succinimide, 4-4, 4-thiobis (2, 6-di-tert-butyl-p-cresol) 4-36%, 7-15% of heavy alkylbenzene synthetic oil and 13-34% of polyisobutylene-mono-succinimide.
2. The high-performance graphene lubricating and improving additive as claimed in claim 1, wherein the high-performance graphene lubricating and improving additive comprises the following raw materials in percentage by mass:
8% of modified graphene oxide, 3% of a dispersant and 89% of lubricating oil, wherein the sum of the contents of the raw materials is 100%; the dispersant comprises 40% of polyisobutylene-poly-succinimide, 24% of 4, 4-thiobis (2, 6-di-tert-butyl-p-cresol), 10% of heavy alkylbenzene synthetic oil and 26% of polyisobutylene-mono-succinimide.
3. The high performance graphene lubricity improving additive of claim 1 wherein the particle size of the modified graphene oxide is 50-80 nm.
4. The high-performance graphene additive for lubricating and improving the performance of the graphene alloy material of claim 1, wherein the lubricating oil comprises any one or a combination of more than two of white oil, lubricating oil mineral base oil and lubricating oil total synthetic base oil.
5. The high performance graphene lubricity improving additive of claim 1 wherein the polyisobutylene-poly-succinimide has an average molecular weight of 2700 to 3000; the average molecular weight of the polyisobutylene-mono-succinimide is 1050-1250.
6. A preparation process of a high-performance graphene lubricating improvement additive is characterized by comprising the following steps:
s1, centrifuging the graphene oxide at a low speed to obtain supernatant, and then drying the supernatant at a low temperature to obtain graphene oxide powder;
step S2, forming a mixed solution of graphene oxide powder and sodium chloride crystals, drying, carbonizing, adding water, performing ultrasonic treatment, performing centrifugal washing, and finally drying to obtain graphene nanosheet powder;
s3, adding the graphene nanosheet powder into a sulfuric acid-nitric acid mixed acid system, performing ultrasonic treatment, centrifuging, washing and drying to obtain modified graphene oxide;
step S4, mixing the modified graphene oxide and a dispersing agent into lubricating oil to form graphene lubricating improvement additive slurry;
and step S5, grinding and packaging to obtain the graphene lubricating improvement additive.
7. The preparation process of the high-performance graphene lubricant improver additive according to claim 6, wherein in step S5, the grinding rate of the grinding treatment is 1500-5000 r/min, and the grinding time is 0.5-10 h.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110046027A1 (en) * | 2009-08-19 | 2011-02-24 | Aruna Zhamu | Nano graphene-modified lubricant |
| CN105296053A (en) * | 2015-10-20 | 2016-02-03 | 唐山市烯润科技发展有限公司 | Method for preparing graphene lubricating oil additive |
| CN106221863A (en) * | 2016-07-07 | 2016-12-14 | 重庆德领科技有限公司 | Modified graphene lubricating oil that a kind of dispersive property is good and preparation method thereof |
| CN107057813A (en) * | 2017-05-02 | 2017-08-18 | 秦继恩 | A kind of graphene lube oil additive, preparation method, purposes and the lubricating oil comprising it |
| CN107177399A (en) * | 2017-06-01 | 2017-09-19 | 吴锋 | A kind of preparation technology of high concentration high stable wear resistence graphene lube oil additive |
| CN109135898A (en) * | 2018-10-31 | 2019-01-04 | 黑龙江莱弗力通科技有限公司 | A kind of graphene lubricating oil composite dispersing agent and preparation method thereof |
-
2019
- 2019-03-07 CN CN201910170686.1A patent/CN111662761A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110046027A1 (en) * | 2009-08-19 | 2011-02-24 | Aruna Zhamu | Nano graphene-modified lubricant |
| CN105296053A (en) * | 2015-10-20 | 2016-02-03 | 唐山市烯润科技发展有限公司 | Method for preparing graphene lubricating oil additive |
| CN106221863A (en) * | 2016-07-07 | 2016-12-14 | 重庆德领科技有限公司 | Modified graphene lubricating oil that a kind of dispersive property is good and preparation method thereof |
| CN107057813A (en) * | 2017-05-02 | 2017-08-18 | 秦继恩 | A kind of graphene lube oil additive, preparation method, purposes and the lubricating oil comprising it |
| CN107177399A (en) * | 2017-06-01 | 2017-09-19 | 吴锋 | A kind of preparation technology of high concentration high stable wear resistence graphene lube oil additive |
| CN109135898A (en) * | 2018-10-31 | 2019-01-04 | 黑龙江莱弗力通科技有限公司 | A kind of graphene lubricating oil composite dispersing agent and preparation method thereof |
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Application publication date: 20200915 |