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A kind of preparation method of graphene lubricating additive

A technology of lubricating additives and graphene, applied in the directions of additives, lubricating compositions, petroleum industry, etc., can solve the problems of easy agglomeration and poor dispersibility, and achieve the effects of preventing agglomeration, low cost and significant market application value.

Active Publication Date: 2018-03-27
深圳市达众智通技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Applying graphene directly as an additive to lubricating oil will have the disadvantages of poor dispersion and easy agglomeration. Therefore, the purpose of the present invention is to prepare a graphene material for lubricating oil additives by mechanical exfoliation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Feed 70 parts by weight of starch and 5 parts by weight of polyethylene glycol into a single-screw extruder, mix and stir for 10 minutes, set the carbonization temperature at 300-500°C for carbonization treatment, and form a carbon source precursor with a porous structure thing;

[0029] (2) After mixing the carbon source precursor obtained in step (1) with the hydroxypropyl chitosan solution with a concentration of 10mol / L at a mass ratio of 1:5, stir at a high speed at 70°C and 1000r / min Disperse for 50 minutes to form a chitosan-modified carbon source dispersion slurry;

[0030](3) Send the carbon source dispersion slurry modified by chitosan in step (2) into a micro-jet nano homogenizer to form a high-pressure fluid, set the homogenization pressure to 100-130Mpa, and the high-pressure fluid will generate huge pressure before and after passing through the valve hole. The pressure gradient forms a high-speed shearing effect to crush and break the carbon source. A...

Embodiment 2

[0033] (1) Send 80 parts by weight of cellulose and 10 parts by weight of urea into a single-screw extruder, mix and stir for 20 minutes, set the carbonization temperature at 300-500°C for carbonization treatment, and form a carbon source precursor with a porous structure;

[0034] (2) After mixing the carbon source precursor obtained in step (1) with the hydroxybutyl chitosan solution with a concentration of 15 mol / L at a mass ratio of 1:5, the mixture was mixed at a high speed at 50°C and 3000r / min. Stir and disperse for 30 minutes to form a chitosan-modified carbon source dispersion slurry;

[0035] (3) Send the carbon source dispersion slurry modified by chitosan in step (2) into a micro-jet nano homogenizer to form a high-pressure fluid, set the homogenization pressure to 100-130Mpa, and the high-pressure fluid will generate huge pressure before and after passing through the valve hole. The pressure gradient forms a high-speed shearing effect to crush and break the carbon...

Embodiment 3

[0038] (1) Send 80 parts by weight of lignin and 5 parts by weight of ammonium oxalate into a single-screw extruder, mix and stir for 20 minutes, set the carbonization temperature at 300~500°C for carbonization treatment, and form a carbon source with a porous structure Precursor;

[0039] (2) After mixing the carbon source precursor obtained in step (1) with the N-maleoylated chitosan solution with a concentration of 20 mol / L at a mass ratio of 1:5, the Stir and disperse at high speed for 20 minutes under the same conditions to form a chitosan-modified carbon source dispersion slurry;

[0040] (3) Send the carbon source dispersion slurry modified by chitosan in step (2) into a micro-jet nano homogenizer to form a high-pressure fluid, set the homogenization pressure to 100-130Mpa, and the high-pressure fluid will generate huge pressure before and after passing through the valve hole. The pressure gradient forms a high-speed shearing effect to crush and break the carbon source...

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Abstract

The invention provides a preparation method of a graphene lubricating additive. The preparation method comprises the following steps of adopting a biomass carbon source as a main raw material; performing high temperature carbonization to form a carbon source precursor with a porous structure; dispersing the carbon source precursor in a modified chitosan solution to improve the dispersing power of the material; shearing and peeling by a microfluidizer; crushing and breaking the carbon source by using a high-speed shearing action formed by a huge pressure gradient to form a graphene material; then stirring and mixing the graphene material with nano mircropore clay; enabling graphene to be uniformly dispersed in a micropore structure of nanoclay to improve the stability of the graphene and reduce the aggregation of the graphene; filtering and drying to obtain the graphene lubricating additive for lubricating oil. According to the graphene lubricating additive prepared by adopting a mechanical stripping method, structure defects are small; after the graphene lubricating additive is added into the lubricating oil, the graphene lubricating additive is high in dispersing power, is not easy to aggregate and good in lubricating effect; in addition, the whole preparation process has the advantages of safe and reliable process, low cost, environmental protection and significant market application value.

Description

technical field [0001] The invention relates to the field of graphene materials, in particular to graphene materials used as lubricating oil additives, and in particular to a preparation method of graphene lubricating additives. Background technique [0002] Graphene is a two-dimensional material with a single layer of carbon atoms stripped from graphite materials. It is currently the thinnest and hardest nanomaterial in the world. It has unique and excellent electrical, thermal, and mechanical properties. , electronic materials, biomedicine and environmental protection and many other fields have received extensive attention. [0003] As an important petroleum product with high technical content, lubricating oil has a wide range of applications and is used in almost all mechanical fields. Lubricating oil generally consists of two parts: base oil and additives. Additives are the essence of lubricating oil. The quality, performance and ratio of additives directly affect the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M125/30C10M125/02C10N30/04C10N30/06C10N20/06
CPCC10M125/02C10M125/30C10M2201/041C10M2201/103C10N2020/06C10N2030/04C10N2030/06
Inventor 陈庆孙丽枝
Owner 深圳市达众智通技术有限公司
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