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Graphene surface dispersity modification method

A graphene surface, graphene technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve problems such as limited preparation conditions, low efficiency, and inability to meet mass production applications. , to achieve the effect of improving comprehensive performance, improving surface state, and improving interface bonding

Inactive Publication Date: 2021-04-09
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although chemical vapor deposition can better disperse graphene on the substrate, its efficiency is low due to the limitation of preparation conditions, which cannot meet the requirements of mass production.

Method used

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  • Graphene surface dispersity modification method
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  • Graphene surface dispersity modification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Using graphene as a reinforcing phase, add graphene to 1000ml of 1g / L dopamine hydrochloride solution, ultrasonically disperse it for 30 minutes, and then apply mechanical stirring for 24 hours. During the reaction process, pay attention to avoiding light to obtain polydopamine graphene solution, and then add 1mol / L CuSO to the polydopamine graphene solution 4 Solution 10ml, Cu 2+ Reduction, Cu nanoparticles were formed on the surface of graphene, and reacted for 4 hours under the action of mechanical stirring. After the polydopamine-reduced copper-modified graphene solution is obtained, the obtained solution is suction-filtered and dried. The polydopamine-reduced copper-modified graphene can be obtained.

Embodiment 2

[0022] Using graphene as a reinforcing phase, add graphene to 1000ml of 1g / L dopamine hydrochloride solution, ultrasonically disperse it for 30 minutes, and then apply mechanical stirring for 24 hours. During the reaction process, pay attention to avoiding light to obtain polydopamine graphene solution, and then add 1mol / L CuSO to the polydopamine graphene solution 4 Solution 20ml, Cu 2+ Reduction, Cu nanoparticles were formed on the surface of graphene, and reacted for 4 hours under the action of mechanical stirring. After the polydopamine-reduced copper-modified graphene solution is obtained, the obtained solution is suction-filtered and dried. The polydopamine-reduced copper-modified graphene can be obtained.

[0023] Add different content of CuSO 4 Cu nanoparticles-modified graphene with different densities can be obtained. figure 1 SEM image of copper-modified graphene reduced to polydopamine. From figure 1 It can be seen that its microscopic appearance shows that s...

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Abstract

The invention discloses a graphene surface modification method, and relates to the field of graphene surface modification. The surface-modified graphene prepared by the method is characterized in that nanoscale copper particles are aggregated into small particles to be dispersed on the surface of the graphene. The method comprises the following steps: by taking graphene as a reinforcing phase, adding graphene into a dopamine hydrochloride solution, then adding CuSO4 into a polydopamine graphene solution, and reducing Cu <2+> to form Cu nanoparticles on the surface of graphene. The surface-modified graphene prepared by the process is stable in microstructure, and can effectively improve the dispersity of the composite material and improve the performance of the composite material when being added into the composite material as a reinforcing phase.

Description

technical field [0001] The invention relates to the field of graphene surface modification, and in particular provides a method for preparing nano-copper particle-modified graphene by in-situ chemical reaction. Background technique [0002] Graphene has excellent mechanical properties and is an excellent reinforcement for various composite materials; although a variety of composite materials have been prepared with graphene as a reinforcement, due to the inevitable van der Waals force between graphene sheets, whether it is mechanically Graphene prepared by exfoliation or redox method is a tightly intertwined cluster of graphene nanosheets, so it is still a challenge to uniformly add nano-enhanced phases such as graphene to composites to obtain high-quality metal matrix composites. big challenge. The key to the dispersion of graphene in the matrix is ​​to overcome the strong mutual attraction (van der Waals force) between graphenes. Researchers have a variety of solutions to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194B22F9/24B82Y30/00B82Y40/00
CPCC01B32/194B22F9/24B82Y30/00B82Y40/00
Inventor 王飞黄平何东军
Owner XI AN JIAOTONG UNIV
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