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Preparation method of surface-modified oil-soluble graphene oxide

A graphene and oil-soluble technology, which is applied in the field of preparation of new nano-functional materials, can solve problems such as process instability and production scale limitation, and achieve the effects of simple process equipment, long-term stable existence, and high yield

Active Publication Date: 2019-07-19
SUZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As we all know, high temperature is easy to cause deoxygenation reduction reaction of graphene oxide, and the prepared graphene colloidal solution will be affected by many factors such as concentration and temperature, which may make the process unstable and the production scale will be limited

Method used

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  • Preparation method of surface-modified oil-soluble graphene oxide
  • Preparation method of surface-modified oil-soluble graphene oxide
  • Preparation method of surface-modified oil-soluble graphene oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Add 3.00g of graphene oxide and 210mL of N,N-dimethylformamide (DMF) into a 1000mL fluorinated bottle, stir to disperse and dissolve on a high-speed mixer, and then crush in an ultrasonic crusher for 3h (power 350W). Transfer the solution into a 1000mL four-neck flask, add 1.00g dehydrating agent 1-ethyl-(3-dimethylaminopropyl) carbodiimide, 8.00g dicyclohexylcarbodiimide, 9.00g octadecyl Amine, stirred at 25°C for 24h. Stirring was stopped, the reaction solution was centrifuged, washed several times with deionized water, and freeze-dried to obtain modified oil-soluble graphene oxide. Its transmission electron microscope image is shown in figure 2 , as can be seen from the figure, the particle size distribution of the obtained product is uniform, and the average particle size is 50-100nm.

Embodiment 2

[0034] Add 3.00g of graphene oxide and 450mL of DMF into a 1000mL fluorinated bottle, stir to disperse and dissolve on a high-speed mixer, and then crush in an ultrasonic breaker for 3h (power 350W). Transfer the solution into a 1000mL four-neck flask, add 1.00g dehydrating agent 1-ethyl-(3-dimethylaminopropyl) carbodiimide, 8.00g dicyclohexylcarbodiimide, 9.00g octadecyl Amine, stirred at 25°C for 48h. Stirring was stopped, the reaction solution was centrifuged, washed several times with deionized water, and freeze-dried to obtain modified oil-soluble graphene oxide. Its transmission electron microscope image is shown in image 3 , as can be seen from the figure, the particle size distribution of the obtained product is uniform, and the average particle size is 20-80nm.

Embodiment 3

[0036] Add 3.00g of graphene oxide, 150mL of 1,2-dichloroethane (DCE), and 300mL of DMF into a 1000mL fluorinated bottle, stir to disperse and dissolve on a high-speed mixer, and then crush in an ultrasonic crusher for 3h (power 350W) . Transfer the solution into a 1000mL four-neck flask, add 1.00g dehydrating agent 1-ethyl-(3-dimethylaminopropyl) carbodiimide, 8.00g dicyclohexylcarbodiimide, 9.00g octadecyl Amine, stirred at 25°C for 48h. Stirring was stopped, the reaction solution was centrifuged, washed several times with deionized water, and freeze-dried to obtain modified oil-soluble graphene oxide.

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Abstract

The invention belongs to the technical field of preparation of novel nanometer functional materials, and particularly relates to a preparation method of surface-modified oil-soluble graphene oxide. The preparation method comprises the following steps: uniformly mixing graphene oxide, a modifier and at least two dehydrating agents in an organic solvent, and preforming a reaction on an obtained mixed solution at 10-60 DEG C for 12-48 hours to obtain the oil-soluble graphene oxide, wherein the modifier is an organic amine compound, and the organic amine compound comprises C6-C20 alkyl. Accordingto the preparation method, a technology and equipment are simple, a raw material is easy to obtain, a reaction condition is mild, operation and posttreatment processes are simple, and the yield is high; the preparation method is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of preparation of novel nano functional materials, in particular to a method for preparing surface-modified oil-soluble graphene oxide. Background technique [0002] Graphene is a carbon atom with SP 2 The new material with a two-dimensional honeycomb lattice structure composed of hybrid orbitals has excellent performance in thermal conductivity and mechanical properties, and has a wide range of uses in the fields of catalysis, electronics, coatings, and lubrication. The literature shows that graphene is expected to be used in the lubricant industry as a new repair lubricant additive. However, due to its high specific surface area and strong van der Waals force between layers, graphene is very easy to agglomerate or re-stack into a graphite structure. The prerequisite for graphene to be used as a lubricating oil additive is that it has sufficient dispersion stability in lubricating oil, and its production ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/198C10M125/02C10N30/04
CPCC01B2204/20C01B2204/32C10M125/02C10N2030/04C01B32/198
Inventor 曾润生陈东立高永建施鹏韩建军梁育强
Owner SUZHOU UNIV
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