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Simple preparation method of amphipathic graphene

A graphene and amphiphilic technology, which is applied in the field of simple preparation of amphiphilic graphene, and achieves the effects of low cost, no pollution of energy consumption, and low energy consumption

Inactive Publication Date: 2013-01-23
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on the lipophilic or hydrophilic modification of graphene, but there are few reports on the ability to disperse graphene in both oily and aqueous solvents using a simple method.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh 70 mg of graphene oxide and disperse it in 70 ml of water and alcohol solution, and sonicate until the dispersion is complete to obtain a uniform graphene oxide solution. Add 350mg oleylamine, fully stir and mix, and react at 180° C. for 12 hours. Stand to cool, take out the reaction product, filter and wash with cyclohexane repeatedly, fully remove residual oleylamine, and obtain lipophilic graphene. Take 35mg of lipophilic graphene and disperse it in 35ml of alcohol solution, sonicate until the dispersion is complete, add 0.5mg of polyethylene glycol, fully stir and mix evenly, and react at 180°C for 12 hours. Stand to cool, take out the reaction product, and wash repeatedly with a mixture of water and alcohol to obtain amphiphilic graphene.

Embodiment 2

[0019] Weigh 70 mg of graphene oxide and disperse it in 7 ml of water and alcohol solution, and sonicate until the dispersion is complete to obtain a uniform graphene oxide solution. Add 0.7 mg oleic acid, fully stir and mix, and react at 90° C. for 50 hours. Stand to cool, take out the reaction product, filter and wash with cyclohexane repeatedly, fully remove residual oleic acid, and obtain lipophilic graphene. Get 35mg of lipophilic graphene and disperse it in 35ml of alcohol solution, sonicate until the dispersion is complete, add 1g of polyethylene glycol, stir and mix evenly, and react at 90°C for 50 hours. Stand to cool, take out the reaction product, and wash repeatedly with a mixture of water and alcohol to obtain amphiphilic graphene.

Embodiment 3

[0021] Weigh 70 mg of graphene oxide and disperse it in 7000 ml of water and alcohol solution, and sonicate until the dispersion is complete to obtain a uniform graphene oxide solution. Add 700mg oleic acid, fully stir and mix, and react at 300°C for 24 hours. Stand to cool, take out the reaction product, and repeatedly filter and wash with chloroform to fully remove residual oleic acid to obtain lipophilic graphene. Get 35mg of lipophilic graphene and disperse it in 70ml of alcohol solution, sonicate until the dispersion is complete, add 100mg of polyethylene glycol, stir and mix well, and react at 300°C for 0.1 hour. Stand to cool, take out the reaction product, and wash repeatedly with a mixture of water and alcohol to obtain amphiphilic graphene.

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PUM

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Abstract

The invention discloses a simple preparation method of amphipathic graphene, which is characterized by comprising the following steps of: dissolving graphene oxide in a water-alcohol solution, wherein the concentration of the graphene oxide is 0.01-10mg / ml; performing ultrasonic dispersion until the graphene oxide is completely dispersed; adding oleylamine / oleic acid into the obtained solution, wherein the mass ratio of the graphene oxide to the oleylamine / oleic acid is (100:1)-(1:100); stirring uniformly, and reacting at 90-300 DEG C for 0.1-50 hours; repeatedly washing the product with cyclohexane and chloroform organic solvents to obtain lipophilic graphene; based on the obtained lipophilic graphene, adding polyethylene glycol, wherein the mass ratio of the lipophilic graphene to the polyethylene glycol is (100:1)-(1:100); stirring uniformly, and reacting at 90-300 DEG C for 0.1-50 hours; and repeatedly washing the product with the mixed solution of water and alcohol to obtain the amphipathic graphene. The amphipathic graphene is soluble in water as well as the organic solvents such as toluene, cyclohexane, acetone, toluene, chloroform and the like; and the preparation method is simple and low in cost and energy consumption and prevents pollution.

Description

technical field [0001] The invention relates to a simple preparation method of amphiphilic graphene, which belongs to the technical field of graphene preparation. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms that is stripped from graphite materials. It is only the thickness of one layer of carbon atoms. It is the thinnest and hardest material so far. Its electrical and thermal conductivity is super strong, far exceeding silicon and Other traditional semiconductor materials. [0003] However, graphene is very easy to agglomerate or re-stack into graphite structure due to its high specific surface area and strong van der Waals interaction between layers. In addition, since graphene is difficult to dissolve in common solvents, its application has been greatly restricted (Stankovich, S.; Dikin, D.A.; Piner, R.; Kohlhaas, K.M.; Kleinhammes, A.; Jia, Y. .; Wu, Y.; Nguyen, S.T.; Ruoff, R.S. Carbon 2007, 45, 1558–1565.). Therefore, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01B32/184C01B32/194
Inventor 杨俊和刘志文马文昊韩卓唐志红
Owner UNIV OF SHANGHAI FOR SCI & TECH