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Preparation method of sulfur-doped alkylated graphene material

A graphene and sulfur-doped technology, applied in graphene, petroleum industry, nano-carbon and other directions, can solve the problems of friction adhesion surface dispersion, unfavorable long-term use, discount of lubricating oil effect, etc., to improve interlayer agglomeration and deposition, The effect of solving uneven lubrication and simple preparation method

Active Publication Date: 2021-11-19
中国人民解放军空军勤务学院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These characteristics make graphene a hot spot in the research of lubricating oil additives, but with the deepening of research, there are still two problems in the application of graphene in lubricating oil additives: one is that the suspension characteristics of graphene in lubricating oil are not good, and it is easy to Stacking, agglomeration and sedimentation are not conducive to long-term use, which greatly reduces the effect of lubricating oil; second, the adhesion of graphene on the friction metal surface is not strong, and the friction adhesion surface is too scattered to form an effective graphene friction surface to enhance the actual lubrication effect
These two defects in structural properties restrict the application of graphene lubricants, and hinder the further development of graphene additives to a certain extent.

Method used

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  • Preparation method of sulfur-doped alkylated graphene material
  • Preparation method of sulfur-doped alkylated graphene material
  • Preparation method of sulfur-doped alkylated graphene material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Take 1 g of graphene powder (3500 mesh), add 46 ml of concentrated sulfuric acid (98%H 2 SO 4 ) and 0.5 g nitric acid (NaNO 3 ), at 35 o Stir for 2 min under heating in a water bath.

[0022] (2) Continue stirring the mixture in an ice bath to lower its temperature to 0 o C, add 3 g potassium permanganate (KMnO 4 ), and the initial temperature of the reaction was controlled at 20 o Within C, after the reaction is stable at 35 o C water bath heating condition was stirred for 24 h, and graphene oxide was obtained after centrifugal filtration.

[0023] (3) Take 100 mg of graphene oxide and disperse it in 5 ml of DMF, mix it evenly by ultrasonic, add 20 ml of thionyl chloride (SOCl 2 ) after vacuuming for 2 min to remove water, at 80 o Reflux for 24 h under the condition of heating in a water bath, and use a calcium chloride drying tube to remove the moisture in the gas.

[0024] (4) After centrifuging the reaction product of the previous step, take the lower l...

Embodiment 2

[0029] (1) Take 1 g of graphene powder (3500 mesh), add 46 ml of concentrated sulfuric acid (98%H 2 SO 4 ) and 0.5 g nitric acid (NaNO 3 ), at 35 o Stir for 2 min under heating in a water bath.

[0030] (2) Continue stirring the mixture in an ice bath to lower its temperature to 0 o C, add 3 g potassium permanganate (KMnO 4 ), and the initial temperature of the reaction was controlled at 20 o Within C, after the reaction is stable at 35 o C water bath heating condition was stirred for 24 h, and graphene oxide was obtained after centrifugal filtration.

[0031] (3) Take 100 mg of graphene oxide and disperse it in 5 ml of DMF, mix it evenly by ultrasonic, add 20 ml of thionyl chloride (SOCl 2 ) after vacuuming for 2 min to remove water, at 80 o Reflux for 24 h under the condition of heating in a water bath, and use a calcium chloride drying tube to remove the moisture in the gas.

[0032] (4) After centrifuging the reaction product of the previous step, take the lower l...

Embodiment 3

[0036] (1) Take 1 g of graphene powder (3500 mesh), add 46 ml of concentrated sulfuric acid (98%H 2 SO 4 ) and 0.5 g nitric acid (NaNO 3 ), at 35 o Stir for 2 min under heating in a water bath.

[0037] (2) Continue stirring the mixture in an ice bath to lower its temperature to 0 o C, add 3 g potassium permanganate (KMnO 4 ), and the initial temperature of the reaction was controlled at 20 o Within C, after the reaction is stable at 35 o C water bath heating condition was stirred for 24 h, and graphene oxide was obtained after centrifugal filtration.

[0038] (3) Take 100 mg of graphene oxide and disperse it in 5 ml of DMF, mix it evenly by ultrasonic, add 20 ml of thionyl chloride (SOCl 2 ) after vacuuming for 2 min to remove water, at 80 o Reflux for 24 h under the condition of heating in a water bath, and use a calcium chloride drying tube to remove the moisture in the gas.

[0039] (4) After centrifuging the reaction product of the previous step, take the lower l...

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Abstract

The present invention utilizes graphene and P 4 S 10 , the chemical reaction of polyamines, so that sulfuration and alkylation reactions occur gradually, so as to achieve the purpose of preparation: enhance the adhesion between graphene and metal surface through sulfur doping, enhance the lipophilicity and dispersion of graphene through alkylation sex. The modification of graphene by this preparation method is more thorough, the preparation method is simple and the effect is remarkable, and the degree of alkylation and vulcanization of the graphene material thus prepared is higher than the existing materials, and the compatibility is better, effectively Solving the two obvious defects of graphene lubricating additives: interlayer deposition and uneven lubrication has a positive effect on promoting the development of graphene lubricating additives.

Description

technical field [0001] The invention relates to a preparation method of a sulfur-doped alkylated graphene material. The material can be used as an auxiliary additive to greatly improve various lubricating indexes and performances of lubricating oil, and effectively slow down the deterioration of lubricating oil. Background technique [0002] Graphene, as a new type of two-dimensional nanomaterial, is the only two-dimensional free state atomic crystal found so far. Many studies have shown that graphene has a special two-dimensional nano-layered structure, high mechanical strength and thermal conductivity. , it can continuously cover the surface of the friction pair, and the roughness of the surface of the friction pair is replaced by the roughness of the graphene surface, so the lubrication mechanism gradually tends to film lubrication, and the mechanical properties of the lubricating oil are improved. These characteristics make graphene a hot spot in the research of lubricat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/184C10M125/02C10M177/00C10N30/04C10N30/06
CPCC10M125/02C10M177/00C10M2201/041C10M2201/14C10N2030/04C10N2030/06C10N2060/10C01B32/184C10N2060/09
Inventor 马军费逸伟胡建强胡役芹姜旭峰吴楠董仕宝徐振超
Owner 中国人民解放军空军勤务学院
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