A kind of fluorinated graphene lubricating oil additive, its preparation method and fluorinated graphene lubricating oil composite material

A lubricating oil additive, graphene lubricating oil technology, applied in additives, lubricating compositions, petroleum industry, etc., can solve the problems of insufficient fluorine repulsion, low interlayer spacing, hidden safety hazards, etc., achieve high utilization rate, increase interlayer spacing , the effect of expanding the layer spacing

Active Publication Date: 2019-12-31
SICHUAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the existing fluorination methods have the following disadvantages: if the degree of fluorination is low, the existence of a small amount of fluorine will lead to insufficient repulsion between fluorine and low interlayer spacing, which cannot meet the requirements for high wear resistance of fluorinated graphene
To increase the degree of fluorination, the fluorination reaction needs to occur under high temperature conditions, and fluorine gas itself has high chemical activity and danger. Therefore, the high-temperature fluorination process has potential safety hazards and high energy consumption. Harsh; at the same time, the amount of fluorine gas is large, and the utilization rate of fluorine gas is not high

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  • A kind of fluorinated graphene lubricating oil additive, its preparation method and fluorinated graphene lubricating oil composite material
  • A kind of fluorinated graphene lubricating oil additive, its preparation method and fluorinated graphene lubricating oil composite material
  • A kind of fluorinated graphene lubricating oil additive, its preparation method and fluorinated graphene lubricating oil composite material

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preparation example Construction

[0025] The preparation method of a kind of lubricating oil additive provided by the embodiment of the present invention, it comprises: After graphene oxide absorbs water, then carry out fluorination reaction, such as figure 1 shown in .

[0026] It should be noted that after using graphene oxide to absorb water, the water easily enters between the layers of graphene oxide and forms hydrogen bonds between the oxygen groups of graphene oxide, and at the same time increases the interlayer distance of graphene oxide, making fluorine gas It is easier to enter for fluorination; the fluorination process is carried out under normal temperature and low fluorine conditions, and the fluorine gas entering the interior of graphene oxide will react with the water medium preferentially, releasing a large amount of heat, which promotes the oxygen bonded with the water hydrogen bond The group breaks quickly, so that the in-situ fluorine gas and the HF generated by fluorine gas and water are gr...

Embodiment 1

[0045] This embodiment provides a kind of lubricating oil composite material, is made by following method:

[0046] First, 50 mg of graphene oxide was dried in a nitrogen atmosphere for 3 hours and then placed in a closed space containing water vapor for 1 hour to absorb moisture.

[0047] Secondly, the graphene oxide was transferred to the fluorination reaction kettle, nitrogen gas was introduced into the reaction kettle and the gas was pumped out until the pressure in the reaction kettle was lower than 100 Pa, and the above-mentioned nitrogen replacement was completed three times.

[0048] Then, feed the mixed gas of 5% fluorine and nitrogen into the reactor at a rate of 0.2 L / min until the pressure in the reactor reaches 2KPa, and react at room temperature for 30 minutes to complete the fluorination to obtain a high Fluorinated graphene with fluorine content.

[0049] Finally, 30 mg of fluorinated graphene was ultrasonically dispersed in 100 mL of liquid paraffin base lubr...

Embodiment 2

[0051] This embodiment provides a kind of lubricating oil composite material, is made by following method:

[0052] First, 50 mg of graphene oxide was dried in a nitrogen atmosphere for 3 hours and then placed in a closed space containing water vapor for 1 hour to absorb moisture.

[0053] Secondly, the graphene oxide was transferred to the fluorination reaction kettle, nitrogen gas was introduced into the reaction kettle and the gas was pumped out until the pressure in the reaction kettle was lower than 100 Pa, and the above-mentioned nitrogen replacement was completed three times.

[0054] Then, feed the mixed gas of 5% fluorine gas and nitrogen gas into the reactor at a rate of 0.2 L / min until the pressure in the reactor reaches 5KPa, and react at room temperature for 30 minutes to complete the fluorination, and obtain high Fluorinated graphene with fluorine content.

[0055] Finally, 30 mg of fluorinated graphene was ultrasonically dispersed in 100 mL of liquid paraffin b...

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Abstract

The invention discloses a fluorinated graphene lubricating oil additive, a preparation method thereof and a fluorinated graphene lubricating oil composite material, and relates to the technical field of lubricating materials. The preparation method of the lubricating oil additive comprises: after the graphene oxide absorbs water, the fluorination reaction is carried out. Using the moisture medium in graphene oxide to "catalyze" the fluorination process of graphene oxide in situ, realize the preparation of fluorinated graphene with low oxygen content, high fluorine content, and large interlayer spacing at room temperature and low fluorine gas concentration. The fluorinated graphene additive is blended with lubricating oil in a simple blending manner, it is not easy to agglomerate in the lubricating oil, and the fluorinated graphene lubricating oil composite material with good dispersion stability is prepared. The coefficient of friction decreased by 52.3% and the wear ratio decreased by 92.5% compared to the pristine composite.

Description

technical field [0001] The invention relates to the technical field of lubricating materials, and in particular to a fluorinated graphene lubricating oil additive, a preparation method thereof and a fluorinated graphene lubricating oil composite material. Background technique [0002] Friction and wear is one of the main reasons for the failure of mechanical parts. According to authoritative statistics, nearly 50% of the world's energy consumption is caused by friction and wear. Therefore, reducing equipment loss and energy consumption caused by friction is a great challenge in today's society. Lubricant additives are critical to improving lubricant performance. In the current lubricating oil market, traditional lubricating oil still occupies a dominant position, but due to its limited lubricating ability and the addition of additives containing sulfur, phosphorus, chlorine and other elements in traditional lubricating oil, which cause serious pollution to the environment, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M125/18C10M177/00C10N30/06C10N30/04
CPCC10M125/18C10M177/00C10M2201/042C10M2205/003C10M2205/163C10M2209/1033C10M2223/0405C10M2229/025C10N2030/04C10N2030/06
Inventor 刘向阳樊坤王旭罗龙波赖文川刘昌莉
Owner SICHUAN UNIV
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