Screening method of oil soluble graphene

A screening method and graphene technology, applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problem that graphite is difficult to exert lubricating performance, and achieve the effect of simple method and good dispersion performance.

Active Publication Date: 2016-11-30
CHONGQING DELING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Once phase separation occurs, graphite is easy to agglo...

Method used

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  • Screening method of oil soluble graphene
  • Screening method of oil soluble graphene

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Experimental program
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Effect test

Embodiment 1

[0020] Use the following methods to screen oil-soluble graphene

[0021] Mix graphene, base oil and dispersant into a uniform solution, then place the solution in a wall breaking machine for processing at a speed of 25,000 rpm or more for 5 minutes, and then process the processed solution at a centrifugal speed of 60,000 to 80,000 Centrifuge for 15 min under the condition of rpm, remove the sediment and collect the supernatant suspension. In the present embodiment, the base oil uses mineral base oil, and what the dispersant uses is stearic acid, and the consumption accounts for 2.3wt% of the base oil; the graphene uses 5-layer graphene, and the graphene addition accounts for 10wt% of the base oil.

[0022] The state diagram after centrifugation is as follows figure 1 , where 1 represents the graphene floating above, and 2 represents the sinking graphene, by figure 1 It can be seen that the solution presents two states after centrifugation, about 70% of the graphene settles a...

Embodiment 2

[0024] Use the following methods to screen oil-soluble graphene

[0025] Mix graphene, base oil and dispersant into a uniform solution, then place the solution in a wall breaking machine for processing at a speed of 28,000 rpm or more for 8 minutes, and then process the processed solution at a centrifugal speed of 60,000 to 80,000 Centrifuge for 20 min under the condition of rpm, remove the sediment and collect the supernatant suspension. In this embodiment, synthetic base oil is used as the base oil, sodium dodecylbenzenesulfonate is used as the dispersant, and the amount accounts for 2.5 wt% of the base oil, and 3-layer graphene is used for graphene, and the amount accounts for 15% of the base oil .

[0026] The state diagram after centrifugation is as follows figure 1 , where 1 represents the graphene floating above, and 2 represents the sinking graphene, by figure 1 It can be seen that the solution presents two states after centrifugation, about 65% of the graphene sett...

Embodiment 3

[0028] Use the following methods to screen oil-soluble graphene

[0029] Mix graphene, base oil and dispersant into a uniform solution, then place the solution in a wall breaking machine for processing at a speed of 30,000 rpm or more for 6 minutes, and then process the processed solution at a centrifugal speed of 60,000 to 80,000 Centrifuge for 18 min under the condition of rpm, remove the sediment and collect the supernatant suspension. In this embodiment, vegetable base oil is used as the base oil, fatty acid glyceride is used as the dispersant, and the consumption accounts for 3.0 wt% of the total solution, and bilayer graphene is used for graphene, and the consumption accounts for 20% of the base oil.

[0030] The state diagram after centrifugation is as follows figure 1 , where 1 represents the graphene floating above, and 2 represents the sinking graphene, by figure 1 It can be seen that the solution presents two states after centrifugation, about 70% of the graphene ...

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Abstract

The invention discloses a screening method of oil soluble grapheme. The method consists of: mixing graphene, base oil and a dispersant into a uniform solution, then putting the solution in a wall breaking machine to perform processing, subjecting the processed solution to centrifugal separation to remove the sediment so as to obtain a suspension. Compared with submerged graphene, the graphene in the separated suspension can be easier to remove surface valence electrons, i.e. better realizing uniform dispersion with an oil solvent. The method disclosed by the invention can screen out oil soluble graphene capable of removing surface valence electrons, and provides an important raw material preparation process for the graphene lubricating oil preparation field.

Description

technical field [0001] The invention belongs to the field of graphene lubricating oil, in particular to a screening method for oil-melting graphene used in producing graphene lubricating oil. Background technique [0002] Graphene is a two-dimensional carbon material, which is a general term for single-layer graphene, double-layer graphene and few-layer (3-10 layers) graphene. Graphene can be firmly attached to the metal surface. Graphene has the characteristics of almost complete transparency, non-toxicity, excellent chemical properties, excellent lubricating properties, high mechanical strength, excellent thermal conductivity, and strong electrical conductivity. field has great application potential. [0003] However, due to the high specific surface area of ​​graphene and the strong van der Waals interaction between layers, they are very easy to agglomerate or re-stack into a graphite structure, and graphene is difficult to dissolve in common solvents. Therefore, in ord...

Claims

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Application Information

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IPC IPC(8): C01B31/04C10M125/02
CPCC10M125/02
Inventor 罗廷军
Owner CHONGQING DELING TECH
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