A kind of amine-based reinforced graphene film, nitrogen-doped graphene film and preparation method thereof

Abstract

The present invention discloses an amido reinforced graphene film, a nitrogen doped graphene film and a preparation method thereof. The method includes the following steps: extruding a graphene oxide solution by a device with an in-line die orifice nozzle; staying, solidifying and reducing in a mixed liquid of liquid amine solidification liquid and a reducing agent for self-assembly into a film, and drying, wherein the temperature of the mixed liquid is 60-95 DEG C, and the stay time is more than 0.5 h. The method has the wide raw material sources and low cost; the preparation method uses graphene oxide solution as raw material, realizes solidification, reduction and self-assembly into amido reinforced graphene film through one step, has the advantages of low reaction temperature, simple operation, green and environment-friendliness, and can realize large-scale continuous preparation. The amido reinforced graphene film prepared by the method has good strength and toughness, excellent thermal conductivity and electrical conductivity, and broadens the scope for subsequent application. The amido reinforced graphene film can increase the electrical conductivity and mechanical properties of the film.

Description

technical field [0001] The field relates to an amine-based reinforced graphene film, a nitrogen-doped graphene film and a preparation method thereof. Background technique [0002] As the most basic structural unit of all carbon materials, graphene has a true single atomic layer thickness and strict two-dimensional structure, and has high mechanical strength, elasticity, thermal conductivity, electrical conductivity, and quantum Hall effect. Since British scientists (Andre Geim) Andre Geim and (Konstantin Novoselov) Kostyanovoseno won the Nobel Prize for their discovery of graphene in 2010, the research on graphene has reached an unprecedented climax, and more and more The research found that it has great application prospects in special fields such as energy storage, electrical devices, catalysis and biomedicine. [0003] The macroscopically assembled graphene film is a main form of macroscopic nanoscale graphene sheets. The commonly used methods include suction filtration,...

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Problems solved by technology

[0003]Macroscopically assembled graphene film is a main form of macroscopic nano-scale graphene sheets. Commonly used methods include suction filtration, scraping film, and spin coating and spraying methods, etc., but these methods limit the large-scale and continuous preparation of graphene films

Chinese invention patent CN201410457039.6 discloses two methods for preparing graphene membranes: firstly, by wet spinning, the membranes are precipitated in a coagulation solution such as an inorganic metal salt solution, dried, and then reduced by a reducing agent. One-step preparation of ion-enhanced graphene membranes, although this method provides a method for continuous preparation of graphene membranes by wet spinning, the preparation process is cumbersome, two-step methods are required to achieve graphene membranes, and due to the precipitation of inorganic salt ions The defect that remains in the film after the agent is added, and the heat treatment process cannot remove it; secondly, the graphene solution is used as the raw material, and the film is solidified in the coagulation solution containing the coordination ions, and dried to obtain the ion-enhanced graphene film. Although the preparation method is simple, because graphene itself has no special functional groups, it is difficult to disperse in organic solvents or water and coordinate solidification with coordination ions, and the concentration of the solution is also difficult to reach the concentration required for solidification. , so it is basically impossible to solidify the graphene solution as the raw material in the coordination ion coagulation solution

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