Preparation method of graphene lubricating additive

A lubricating additive and graphene technology, applied in the direction of additives, lubricating compositions, petroleum industry, etc., can solve the problems of easy agglomeration and poor dispersion, and achieve the effect of preventing agglomeration, low cost and small investment

Active Publication Date: 2016-06-15
深圳市天润石墨烯材料科技股份有限公司
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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. The

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1

[0028] (1) 70 parts by weight of starch and 5 parts by weight of polyethylene glycol are fed into a single-screw extruder and mixed and stirred for 10 minutes, and the carbonization temperature is set to 300~500℃ for carbonization treatment to 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 high speed at 70°C and 1000r / min. Disperse for 50 minutes to form a chitosan-modified carbon source dispersion slurry;

[0030] (3) The carbon source dispersion slurry modified by chitosan in step (2) is sent to the micro-jet nano-homogenizer to form a high-pressure fluid, and the homogenizing pressure is set to 100-130Mpa. The pressure gradient forms a high-speed shearing effect to smash and break the carbon source. The smashed and broken carbon source slurry forms a high-speed jet afte...

Example Embodiment

[0032] Example 2

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

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

[0035] (3) The carbon source dispersion slurry modified by chitosan in step (2) is sent to the micro-jet nano-homogenizer to form a high-pressure fluid, and the homogenizing pressure is set to 100-130Mpa. The pressure gradient forms a high-speed shearing effect to smash and break the carbon source. The smashed and broken carbon source slurry forms a high-speed jet after passing through ...

Example Embodiment

[0037] Example 3

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

[0039] (2) After mixing the carbon source precursor obtained in step (1) with the N-maleylated chitosan solution with a concentration of 20mol / L at a mass ratio of 1:5, the mixture is heated at 70°C and 5000r / min. Stir and disperse at high speed for 20 minutes to form a chitosan modified carbon source dispersion slurry;

[0040] (3) The carbon source dispersion slurry modified by chitosan in step (2) is sent to the micro-jet nano-homogenizer to form a high-pressure fluid, and the homogenizing pressure is set to 100-130Mpa. The pressure gradient forms a high-speed shearing effect to smash and break the carbon source. The smashed and broken carbon source slurry forms a high-speed jet a...

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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 is generally composed of base oil and additives. The additive is the essence of the lubricating oil. The quality and performance of the additive and the ratio of addition d...

Claims

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Application Information

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IPC IPC(8): C10M125/30C10M125/02C10N30/04C10N30/06C10N20/06
CPCC10M125/02C10M125/30C10M2201/041C10M2201/103C10N2020/06C10N2030/04C10N2030/06
Inventor 陈庆孙丽枝
Owner 深圳市天润石墨烯材料科技股份有限公司
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