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Preparation method and application of water-based lubricant using graphene quantum dots as additive

A graphene quantum dot, water lubricant technology, applied in the directions of additives, lubricating compositions, petroleum industry, etc., can solve the problems of poor lubricating performance, limited development, application limitations of water lubricants, etc., to achieve reliable quality, stable process, Easy-to-operate effects

Inactive Publication Date: 2019-05-07
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, in the historical development of tribology, water has always been a cheap and environmentally friendly lubricant used in various lubrication systems. However, the low viscosity of water itself makes its lubrication performance compared with that of oil and grease The lubricant is poor, and water is corrosive to steel devices. These defects of water lubricants greatly limit its development in the field of metal cutting and metal parts processing.
In addition, these deficiencies will also greatly limit the application of water lubricants in the fields of biological mucus and joint fluid lubrication.

Method used

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  • Preparation method and application of water-based lubricant using graphene quantum dots as additive
  • Preparation method and application of water-based lubricant using graphene quantum dots as additive
  • Preparation method and application of water-based lubricant using graphene quantum dots as additive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Example 1 Preparation of a water lubricant with graphene quantum dots as an additive. At room temperature, graphene quantum dots (GQDs) were added to ultrapure water to form an aqueous solution with a uniform and stable concentration of 0.5 mg / mL, namely Get water lubricant.

[0034] Among them: Graphene quantum dots are prepared according to the following method:

[0035] (1) After heating the graphite oxide powder at 300°C, disperse it in a sulfuric acid solution with a mass concentration of 96%. After sonicating at 20°C for 2h, add a 65% nitric acid solution with a mass concentration of nitric acid for 10h to obtain a mixed solution.

[0036] Among them: the mass-volume ratio of graphite oxide powder and sulfuric acid solution (mg / mL) is 1:0.2; the mass-volume ratio of graphite oxide powder and nitric acid solution (mg / mL) is 1:0.6.

[0037] ⑵ Add 6 times the volume of ultrapure water to the mixed solution, mix well, cool to room temperature, filter and wash with suction to ...

Embodiment 2

[0041] Example 2 Preparation of a water lubricant with graphene quantum dots as an additive. At room temperature, graphene quantum dots (GQDs) were added to ultrapure water to form an aqueous solution with a uniform and stable concentration of 4 mg / mL, namely Get water lubricant.

[0042] Among them: Graphene quantum dots are prepared according to the following method:

[0043] (1) After heating the graphite oxide powder at 300°C, disperse it in a sulfuric acid solution with a mass concentration of 96%. After 5 hours of ultrasonication at 25°C, add a 65% solution of nitric acid with a mass concentration of nitric acid and continue ultrasonication for 20 hours to obtain a mixed solution.

[0044] Among them: the mass-volume ratio of graphite oxide powder and sulfuric acid solution (mg / mL) is 1:0.25; the mass-volume ratio of graphite oxide powder and nitric acid solution (mg / mL) is 1:0.75.

[0045] ⑵ Add 8 times the volume of ultrapure water to the mixed solution, mix well, cool to room...

Embodiment 3

[0049] Example 3 Preparation of a water lubricant with graphene quantum dots as an additive. At room temperature, graphene quantum dots (GQDs) were added to ultrapure water to form an aqueous solution with a uniform and stable concentration of 8 mg / mL, namely Get water lubricant.

[0050] Among them: Graphene quantum dots are prepared according to the following method:

[0051] (1) After heating the graphite oxide powder at 300°C, disperse it in a sulfuric acid solution with a mass concentration of 96%. After sonicating at 30°C for 3.5 hours, add a 65% nitric acid solution with a mass concentration of nitric acid for 15 hours to obtain a mixed solution.

[0052] Among them: the mass-volume ratio (mg / mL) of graphite oxide powder and sulfuric acid solution is 1:0.3; the mass-volume ratio (mg / mL) of graphite oxide powder and nitric acid solution is 1:0.9.

[0053] (2) Add 10 times the volume of ultrapure water to the mixed solution, mix it and cool to room temperature, filter and wash wi...

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Abstract

The invention relates to a preparation method of a water-based lubricant using graphene quantum dots as an additive. The method is characterized in that the graphene quantum dots are added to ultrapure water at room temperature to form an aqueous solution with a uniform and stable concentration of 0.5-8 mg / mL, that is the water-based lubricant. The invention also discloses an application of the water-based lubricant as a lubricant material for mechanical moving parts in an aqueous environment. The preparation method has the advantages of simplicity, easiness in operation, stable process, reliable quality, low cost, renewability and no pollution, and makes modern lubricant materials meet the basic requirements of commercialization, and the prepared water-based lubricant has excellent lubrication behavior and excellent wear resistance.

Description

Technical field [0001] The invention relates to the field of nanomaterials and the technical field of water lubricants, and in particular to the preparation and application of a water lubricant using graphene quantum dots (GQDs) as additives. Background technique [0002] With the deteriorating environmental problems, water-based lubricants have received more and more attention in the field of tribology. As we all know, in the historical development of tribology, water has always been a low-cost and environmentally friendly lubricant used in various lubrication systems. However, the low viscosity of water makes its lubricating performance compared to oil and grease lubrication. The agent is poor, and water is corrosive to steel devices. These defects of water lubricants greatly limit its development in the fields of metal cutting and metal parts processing. In addition, these deficiencies will also greatly limit the application of water lubricants in the field of biological mucu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/02C10M173/02C10N30/06
Inventor 王金清强睿斌侯凯明杨生荣
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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