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Multi-element modified graphene quantum dot composite lubricating oil additive and preparation method thereof

A graphene quantum dot and multi-element technology, applied in the direction of additives, petroleum industry, lubricating composition, etc., to achieve the effects of improving lubrication, shortening carbonization reaction time, and improving production efficiency

Active Publication Date: 2022-05-17
肇庆中特能科技投资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As far as the application of hydrophobic systems is concerned, the conventionally prepared graphene quantum dots are restricted in lubricating oil due to their hydrophilicity and insolubility, while the multi-element modified hydrophobic graphene quantum dots are less reported.

Method used

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  • Multi-element modified graphene quantum dot composite lubricating oil additive and preparation method thereof
  • Multi-element modified graphene quantum dot composite lubricating oil additive and preparation method thereof
  • Multi-element modified graphene quantum dot composite lubricating oil additive and preparation method thereof

Examples

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preparation example Construction

[0045] A hydrophobic multi-element modified graphene quantum dot, the preparation method of which includes the following steps:

[0046] Doping reaction: in the reaction kettle, non-aqueous solvent, carbon source, doped element precursor and catalyst were added sequentially, stirred evenly and then refluxed completely, to give mixture A;

[0047] Hydrophobic modification reaction: hydrophobic reagent is added to mixture A, the reflux reaction is sufficient, solid-liquid separation, filtrate is removed from the unless water solvent is obtained hydrophobic multi-element modified graphene quantum dots;

[0048] Wherein, the doped elements are at least 2 of B, N and Si, preferably, the amount of doped element precursors is 0.6 to 0.9 times that of the carbon source.

[0049] In some examples, the non-aqueous solvent is a monohydrate, a mixture of binary alcohols.

[0050] In some examples, the boiling point of the monohydrol at standard atmospheric pressure is not less than 75 ° C, furt...

Embodiment 1

[0078] 1) Doping reaction: in the reactor sequentially add 8 parts (mass ratio) ethanol and ethylene glycol (volume ratio 2:1) mixture, 1 part citric acid and its butyl ester (volume ratio 1:1) mixture, 0.1 part boric acid and ethyl borate (mass ratio 1:1), 0.6 parts tetraethyl silicate, 0.1 parts of six methyltetraamine and 0.2 parts of transition metal composite oxide LiMn 0.5 Ni 0.5 O 2 After stirring well, it should be refluxed at 180 °C for 2h and cooled to room temperature;

[0079] 2) Hydrophobic modification reaction: C18 fatty amine is added to the mixture, then refluxed for 2h, centrifuged after cooling, the filtrate is a hydrophobic fossilene quantum dot solution containing multi-element modified hydrophobic graphene, and hydrophobic poly-element doped graphene quantum dots are obtained after the solvent is removed by vacuum at 80-150 °C.

Embodiment 2

[0081] 1) Doping reaction: in the reactor sequentially added 8 parts (mass ratio) ethanol and ethylene glycol (volume ratio 1:1), 1 part butyl citrate and urea (mass ratio 1:1), 0.1 part boric acid and butyl borate ester (mass ratio 1:1), 0.6 parts tetraethyl silicate and phenyl siloxane (mass ratio 1:1), 0.1 parts of sixth methyltetraamine and 0.2 parts of LiNiO 2With ZnO (mass ratio 1:1), stir well and then reflux at 220 °C for 2h and cool to room temperature;

[0082] 2) Hydrophobic modification reaction: C10 fatty amine is added to the mixture, and then refluxed for 2h, centrifuged after cooling, the filtrate is a hydrophobic fossilene quantum dot solution containing multi-element modification, and the solid paste is obtained after the solvent is removed by vacuum at 80-160 °C, and the hydrophobic multi-element doped graphene quantum dots are obtained.

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Abstract

The invention discloses a multi-element modified graphene quantum dot composite lubricating oil additive and a preparation method thereof. The multi-element modified graphene quantum dot is prepared by solvothermal reaction, and then the hydrophobic modification is carried out to obtain the hydrophobic multi-element modified graphene quantum dot. point. In some examples of the present invention, the prepared hydrophobic multi-element modified graphene quantum dots have a size of less than 5nm, a high proportion of hydrophobic chains, a monodisperse state in lubricating oil, and can be stably dispersed in various lubricating oils. Accelerated experiments It shows that there is no precipitation for more than half a year. In some examples of the present invention, single-molecule wear-resistant silicon dioxide, boron nitride, and graphene layers can be quickly formed at the friction point, which can significantly improve the lubricating and wear-resistant effects of lubricating oil.

Description

Technical field [0001] The present invention relates to a new material, specifically to a multi-element modified graphene quantum dot composite lubricating oil additive and preparation method thereof. Background [0002] The research and application results of the past ten years show that nanomaterials have a wide application prospect in lubricating oil. The simultaneous addition of graphene and nanoparticles (such as silica, boron nitride, molybdenum disulfide, copper, etc.) to the lubricating oil can reduce the friction coefficient of the interacting components, reduce wear, and significantly improve the lubrication capacity, efficiency and prolong the service life of the lubricating oil. In addition, nanoparticles can also be attached to the surface of the friction sub-metal workpiece to repair the damaged part of the metal surface; after a long time of operation, a strong attachment film will be formed on the surface of the friction sub-metal, the composition of this attachm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M125/00C10M125/02C09K11/65B82Y20/00B82Y30/00C10N30/06
CPCC10M125/00C10M125/02C09K11/65B82Y20/00B82Y30/00C10M2201/14C10M2201/041C10N2030/06C10M2201/087C10M2201/105
Inventor 何可立铁绍龙何幸华曾绮雯吴嘉豪
Owner 肇庆中特能科技投资有限公司
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