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Graphene water lubrication additive, as well as preparation method and application thereof

A water lubrication and additive technology, applied in the field of lubricant additives, can solve problems such as poor lubrication performance and weak adhesion, and achieve the effects of solving poor lubrication performance, reducing friction coefficient and reducing environmental pollution

Active Publication Date: 2018-06-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a graphene water lubricating additive and its preparation method and application, to overcome technical problems such as poor lubricating performance and weak adhesion of existing water medium lubricants

Method used

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  • Graphene water lubrication additive, as well as preparation method and application thereof
  • Graphene water lubrication additive, as well as preparation method and application thereof
  • Graphene water lubrication additive, as well as preparation method and application thereof

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preparation example Construction

[0034] An aspect of the embodiments of the present invention provides a PEG-NH 2 The preparation method of modified carboxylated graphene, it comprises:

[0035] reacting a first homogeneously mixed system comprising an amino-protecting group compound and ethanolamine to form amino-protected ethanolamine;

[0036] The second homogeneous mixing system comprising polyethylene glycol, bridging agent, and amino-protected ethanolamine is reacted to form polyethylene glycol derivatives (hereinafter referred to as PEG-NH for short) with amino groups. 2 ), as a yellow oil;

[0037] The polyethylene glycol derivatives with amino groups are used as modifiers and carboxylated graphene (G-COOH) to carry out amidation reaction to form polyethylene glycol derivatives (PEG-NH) with amino groups at one end. 2 ) modified carboxylated graphene (hereinafter referred to as PEG-G) to obtain graphene water lubricating additive.

[0038] In some embodiments, the preparation method includes: react...

Embodiment 1

[0070] Dissolve 200 mmol of di-tert-butyl dicarbonate in an appropriate amount of dioxane and slowly add it into 200 mmol of ethanolamine at 0° C. to react for 12 hours to obtain amino-protected ethanolamine. Add polyethylene glycol dropwise to toluene diisocyanate at 0°C to react for 2 hours, then add the amino-protected ethanolamine obtained above at 0°C to continue the reaction for 2 hours, the molar mass of polyethylene glycol, amino-protected ethanolamine and toluene diisocyanate The ratio is 1:1:1, and using trifluoroacetic acid to remove the amino protecting group can obtain polyethylene glycol derivatives with amino groups (PEG-NH 2 ), as a yellow oil.

[0071] 200mg carboxylated graphene (purchased from Hangzhou Carbon Nanomaterials Co., Ltd.) and an appropriate amount of PEG-NH 2 Disperse in 100ml deionized water (carboxyl and PEG-NH in carboxylated graphene 2 The molar ratio of the amino group is 1:1), add an appropriate amount of EDC to activate the carboxyl grou...

Embodiment 2

[0073] Dissolve 200 mmol of di-tert-butyl dicarbonate in an appropriate amount of dioxane and slowly add it into 200 mmol of ethanolamine at 5° C. to react for 16 hours to obtain amino-protected ethanolamine. Add polyethylene glycol dropwise to toluene diisocyanate at 25°C for 3 hours and then add the amino-protected ethanolamine obtained above at 25°C to continue the reaction for 3 hours, wherein the molar ratio of polyethylene glycol to amino-protected ethanolamine is 1 : 1, the molar ratio of polyethylene glycol to toluene diisocyanate is 1:1.2, and use trifluoroacetic acid to remove the amino protecting group to obtain polyethylene glycol derivatives with amino groups (PEG-NH 2 ), as a yellow oil.

[0074] 200mg carboxylated graphene (purchased from Hangzhou Carbon Nanomaterials Co., Ltd.) and an appropriate amount of PEG-NH 2 Disperse in 100ml deionized water (carboxyl and PEG-NH in carboxylated graphene 2 The molar ratio of the amino group is 1:1), add an appropriate a...

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Abstract

The invention discloses a graphene water lubrication additive, as well as a preparation method and application thereof. The preparation method comprises the steps of reacting a uniform mixing system containing polyethylene glycol, a bridging agent and amino-protecting ethanol amine to form a polyethylene glycol derivative with an amino group; using the polyethylene glycol derivative with the aminogroup as a modifier, carrying out amidation reaction on the modifier and carboxyl graphene forming polyethylene glycol derivative modified carboxyl graphene with the amino group on a single end to obtain the graphene water lubrication additive. The preparation method provided by the invention is simple; the graphene water lubrication additive has excellent wear reduction and wear resistance, andis used as a substitute goods of an oil-based lubricant so as to be applied to a water-based lubricating agent, so that the environment pollution can be reduced, a safety performance is high, and meanwhile, the graphene water lubrication additive has excellent wear reduction and wear resistance, and excellent safety and cooling performance, can be applied to various fields such as micromechanicallubrication, water-based hydraulic fluids and cold-rolling fluids, and plays roles in reducing friction coefficient, resisting wear and reducing energy consumption.

Description

technical field [0001] The invention relates to a graphene water lubricating additive, in particular to a PEG-NH 2 The graphene water lubricating additive prepared by modified carboxylated graphene and its preparation method and application belong to the technical field of lubricating additives. Background technique [0002] In recent years, compared with lubricating oil, water-based lubricants have been widely used in the fields of micromechanical lubrication, cutting fluid and hydraulic fluid due to their excellent cooling performance, flame retardancy, high safety performance and low pollution. However, its practical application is limited due to its poor lubricating performance and easy corrosion. Therefore, the preparation and application of water-based lubricant additives is particularly important. [0003] As a two-dimensional carbon nanomaterial, graphene has a thickness of only 0.335nm and has excellent optical, electrical and thermal properties. In addition, gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M159/12C08G18/66C08G18/48C08G18/32C10M173/02C10N30/06C10N40/06C10N40/08C10N40/24
CPCC08G18/3271C08G18/4825C08G18/4833C08G18/6688C10M159/12C10M173/02C10M2201/14C10N2030/06C10N2030/56C10N2040/06C10N2040/08C10N2040/24
Inventor 王永欣胡艺纹赵海超曾志翔薛群基
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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