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A kind of lubricating oil based on siloxane modified graphene and preparation method thereof

A technology of siloxane modification and graphene, applied in the field of lubricating oil, can solve the problems of unfavorable industrial production, harsh conditions, easy agglomeration of graphene, etc., and achieve the effects of slowing down agglomeration, avoiding agglomeration and improving dispersibility

Active Publication Date: 2021-11-09
周旗
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although the Chinese patent application with the application number 201810421587.1 discloses a graphene lubricating oil and its preparation method, which can effectively solve the problem that graphene is easy to agglomerate and precipitate, it uses egg oil, which is extremely expensive and requires harsh conditions. Not conducive to industrial production

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  • A kind of lubricating oil based on siloxane modified graphene and preparation method thereof
  • A kind of lubricating oil based on siloxane modified graphene and preparation method thereof
  • A kind of lubricating oil based on siloxane modified graphene and preparation method thereof

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preparation example Construction

[0044] The preparation method of few-layer graphene oxide used in the present invention is: adopt Hummer method, add 2g flake graphite powder in a 250mL beaker, add 1gNaNO therein under the condition of ice-water bath 3 After adding 46 mL of 98% H 2 SO 4 And after fully stirring, slowly add 6gKMnO 4, keep the temperature of the solution at 20 degrees Celsius for at least 5 minutes, then heat to 35 degrees Celsius and keep for 30 minutes; add 92mL of water and stir for 15 minutes, the temperature will rise to about 98 degrees Celsius; then add 80mL of 60 degrees Celsius with a volume concentration of 3% Hydrogen peroxide, centrifuged at 7200 rpm for 30 minutes, washed the residue with hot water at 60 degrees Celsius until the pH of the upper suspension was 7, dispersed the obtained powder into water again, ultrasonicated for 15 minutes, and filtered out the black residue to obtain a uniform suspension, and then spray-dried to obtain few-layer graphene.

[0045] In the presen...

Embodiment 1

[0047] A kind of lubricating oil based on siloxane modified graphene comprises following components by weight:

[0048]

[0049]

[0050] The siloxane-modified graphene is prepared from graphene oxide, polydimethylsiloxane and silane coupling agent in a mass ratio of 1:1:2;

[0051] The silane coupling agent is composed of vinyltriethoxysilane (A-151) and N-aminoethyl-γ-aminopropyltriethoxysilane (KH-791) in a mass ratio of 2:1.

[0052] Its production method is:

[0053] Step 1. Preparation of siloxane-modified graphene: step A, according to the mass ratio of N-aminoethyl-γ-aminopropyltriethoxysilane to water 1:5, N-aminoethyl-γ-ammonia Add propyltriethoxysilane to water, and disperse evenly to obtain an aqueous solution of N-aminoethyl-γ-aminopropyltriethoxysilane for later use; according to the mass ratio of vinyltriethoxysilane to absolute ethanol: 1: 5. Dissolve vinyltriethoxysilane in absolute ethanol to obtain vinyltriethoxysilanol solution for later use;

[00...

Embodiment 2

[0061] A kind of lubricating oil based on siloxane modified graphene comprises following components by weight:

[0062]

[0063]

[0064] The siloxane-modified graphene is prepared from graphene oxide, polydimethylsiloxane and silane coupling agent in a mass ratio of 1:1:2;

[0065] The silane coupling agent is composed of vinyltriethoxysilane and N-aminoethyl-γ-aminopropyltriethoxysilane in a mass ratio of 2:1.

[0066] Its preparation method is: with embodiment 1.

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Abstract

The invention relates to a lubricating oil based on siloxane-modified graphene and a preparation method thereof, comprising the following components in parts by weight: 75-95 parts of base oil; 5-10 parts of tackifier; 0.1-1 parts of pour point depressant 2-7 parts of detergent; 1-5 parts of ashless dispersant; 0.5-3 parts of anti-oxidant preservative; 1-3 parts of siloxane modified graphene; the siloxane modified graphene is made of graphite oxide Alkene, polysiloxane and silane coupling agent are prepared according to the mass ratio of 1:1:2; the silane coupling agent is composed of vinyltriethoxysilane and N-aminoethyl-γ-aminopropyltri Ethoxysilane is composed of 1~3:1 mass ratio. The invention can effectively improve the dispersion stability of graphene, and the material is easy to obtain, the cost is low, the process is simple, and industrial production can be carried out.

Description

technical field [0001] The invention relates to the field of lubricating oil, in particular to a lubricating oil based on siloxane-modified graphene and a preparation method thereof. Background technique [0002] The lubricating performance of the engine is closely related to the safety, environmental protection and energy-saving performance of the car. With the continuous improvement of engine performance, the requirements for lubrication are becoming more and more complex and demanding. As a new carbon material with a two-dimensional structure, graphene oxide , has a series of excellent properties such as high specific surface area, thermal conductivity, and mechanical properties. Therefore, in order to improve engine lubrication performance and achieve wear reduction and energy saving, it is necessary to add a certain amount of graphene to lubricating oil. However, how to prevent adding The layering and precipitation of lubricating oil with graphene oxide is a technical p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10N30/06C10N30/04
Inventor 周旗周洁
Owner 周旗