High-quality graphene dispersion method and film preparation method

A film preparation and graphene technology, applied in the field of graphene, can solve problems such as difficult to remove, impact, dispersant residue, etc., and achieve excellent electrical and thermal properties
CN103449420BActive Publication Date: 2015-03-25INST OF METAL RESEARCH - CHINESE ACAD OF SCI +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
Publication Date
2015-03-25

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Abstract

The invention relates to the field of graphene, particularly a high-quality graphene dispersion method and a method for preparing a film from a corresponding graphene dispersion solution or slurry. Graphene powder or aggregation-state slurry is added into a micromolecule amine compound solution to carry out dispersion treatment, so that the three amine micromolecule compounds are utilized to implement dispersion of the graphene; and in the dispersion solution, the molecules of the compounds are combined with the graphene under the pai-pai interaction, the amino group protonation is utilized to electrically charge the graphene, and the electrostatic repulsion action is utilized to prevent aggregation, thereby implementing the stable dispersion of the graphene. The dispersion solution or slurry can be subjected to spray coating, roller coating, scratch coating or any other conventional coating preparation method to obtain a graphene film on the substrate surface. The method can implement high-concentration efficient dispersion on high-quality graphene with the carbon / oxygen atom ratio of greater than 20 in multiple solvents; and after the film is formed and dried, no solvent or dispersant residue exists.
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Description

technical field

[0001] The invention relates to the field of graphene, in particular to a method for dispersing high-quality graphene, and a method for preparing a film by using the corresponding graphene dispersion or slurry. Background technique

[0002] Graphene (Graphene) has attracted much attention as a new type of carbon material. It is a sp 2 Composed of hybrid carbon atoms, a two-dimensional crystal material with a thickness of only a single atomic layer has excellent properties such as high light transmission and electrical conductivity, high specific surface area, high strength and flexibility, and is expected to be used in high-performance nanoelectronic devices. , photoelectric devices, gas sensors, composite materials, field emission materials and energy storage and other fields have been widely used. High-quality graphene refers to a large sheet area (lateral dimension > 1 micron), complete crystal structure, less defects (Raman spectrum shows that the D p...

Claims

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