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Preparation method of modified carbon nanosphere lubricating oil additive

A technology of lubricating oil additives and nanospheres, which is applied in the direction of additives, nanocarbons, lubricating compositions, etc., can solve problems such as unsatisfactory dispersion effects, dispersion problems, ineffective stability, entanglement dispersion, etc., to reduce the friction coefficient and bite load, easy to control, and the effect of improving the load-carrying capacity

Active Publication Date: 2019-12-31
青岛鑫乐驰润滑油有限公司
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Problems solved by technology

[0003] In recent years, based on carbon nanotubes as solid lubricants, it has attracted widespread attention at home and abroad. However, due to the microstructure of carbon nanotubes (the microscopic shape is long and easy to entangle) and the easy adsorption characteristics of nanomaterials, their dispersion and stability has not been able to effectively solve
Most of the current solutions are to treat the surface of carbon nanotubes by means of dispersants, surface modification, etc., but due to the unsatisfactory dispersion effect of its own characteristics, it does not meet the needs of existing industrial production. At present, there is no way to adjust carbon nanotubes Microstructure methods, such as preparing carbon nanotubes into elastic spherical structures, are more conducive to rolling and surface lubrication, improving the anti-wear performance of the system and solving the problem of entanglement and dispersion between carbon nanotubes. For this reason, we propose a Preparation method of modified carbon nanosphere lubricating oil additive

Method used

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  • Preparation method of modified carbon nanosphere lubricating oil additive
  • Preparation method of modified carbon nanosphere lubricating oil additive
  • Preparation method of modified carbon nanosphere lubricating oil additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In this example, the preparation method of the modified carbon nanosphere lubricating oil is as follows:

[0028] (1) Add 1 g of multi-walled carbon nanotube powder into 150 mL of hydrogen peroxide solution, stir at 80° C. for 8 hours, then wash with deionized water three times, and dry at 60° C. for 8 hours to obtain product A.

[0029] (2) Add product A to 200mL sulfuric acid solution, stir in a cold water bath (2-10°C) for 12 hours, wash with deionized water and ethanol for 5 times, and freeze-dry at -15°C for 12 hours to obtain oxidized carbon nanotube powder ;

[0030] (3), adding deionized water to the oxidized carbon nanotube powder, processed into 50mL oxidized carbon nanotube sol (8mg / mL) through shear dispersion, the shear dispersion rate was 10000r / min, and the shear time was 1 hour. The sol was spray-dried to obtain a wrinkled carbon nanotube sphere powder, and the spray-drying temperature was 150° C.

[0031] (4) Add 0.5g of carbon nanotube sphere powder,...

Embodiment 2

[0033] Add 0.005g of modified carbon nanospheres (modified carbon nano-lubricating oil additive) and 0.005g of carbon nanotubes to 50mL of base lubricating oil (SJ15W / 40), disperse at a high speed of 5000r / min for 30min, and then 10000r / min After cutting for 30 minutes, two kinds of carbon nano-lubricating oil products were obtained. After being tested by a four-ball machine, the modified carbon nano-ball lubricating oil did not settle after standing for 6 months, and the friction coefficient was better than that of carbon nano-tube lubricating oil and base oil.

Embodiment 3

[0035] Add 3.5g of modified carbon nanospheres (modified carbon nano-lubricating oil additive) to 4L of base lubricating oil, disperse at a high speed of 5000r / min for 30min, and then shear at 10000r / min for 1h to obtain a finished carbon nano-lubricating oil; The base oil added with lubricating oil is compared with the road test test, and the test results show that the oil saving rate of the modified carbon nanosphere lubricating oil compared with the base oil is 4-5%.

[0036] From the experimental data in Table 2 and Table 3, it can be seen that the preparation method of the modified carbon nanosphere lubricating oil additive of the present invention is mainly based on the principle of adjusting the microscopic linear structure of carbon nanotubes into a spherical structure, relying on the synergistic effect of chemical modification and physical granulation , transforming carbon nanotubes from a linear structure into a three-dimensional wrinkled spherical structure, and then...

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Abstract

The invention discloses a preparation method of a modified carbon nanosphere lubricating oil additive, wherein the preparation method comprises the following steps: adding carbon nanotube powder intoa hydrogen peroxide solution, stirring the solution, washing after stirring, and drying after washing to obtain a product A. The invention also discloses the preparation method of the modified carbonnanosphere lubricating oil additive. The carbon nanotube powder with mature process is used as a raw material; the method is based on a carbon nanotube nano microstructure transformation principle, the synergistic effect of chemical modification and physical granulation is relied on, and carbon nanotubes are transformed into a three-dimensional folded spherical structure from a linear structure; the oil-soluble lubricating oil additive having the elastic 'ball bearing' effect is prepared through surface modification treatment, the dispersion stability is enhanced, the lubricating wear resistance under different engine working condition loads is improved, the control is easy, the cost is low, the oil-soluble lubricating oil additive is suitable for the large-scale preparation, and the gooduse prospect is brought.

Description

technical field [0001] The invention relates to the field of modified carbon nanosphere lubricating oil additives, in particular to a preparation method of modified carbon nanosphere lubricating oil additives. Background technique [0002] As a new type of carbon nanomaterial, carbon nanotubes have extremely high toughness, and their structure is similar to graphite and molybdenum disulfide. The tube wall has a hexagonal structure of graphite layers, so it has excellent self-lubricating properties. Moreover, the current preparation process of carbon nanotubes is very mature, and the preparation cost is lower than that of carbon nanomaterials such as graphene and graphyne. It has a price advantage as a function-enhancing material, which is conducive to actual production; [0003] In recent years, based on carbon nanotubes as solid lubricants, it has attracted widespread attention at home and abroad. However, due to the microstructure of carbon nanotubes (the microscopic shape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C01B32/15C01B32/168C10N30/04
CPCC10M125/02C01B32/15C01B32/168C10M2201/14C10M2201/041C10N2030/04
Inventor 孙震杨智斌
Owner 青岛鑫乐驰润滑油有限公司
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