43results about How to "Single layer rate is high" patented technology

The invention discloses a continuous production device for aminated graphene and a method and belongs to the technical field of graphene preparation. The continuous production device comprises an acidtreatment device, an oxidation device, a first washing suction filtration device, a second washing suction filtration device, a dispersion treatment device, a first homogenization treatment device, afirst micro-reaction device, a first tubular reaction device, a second tubular reaction device, a first suction filtration and dispersion device, a second micro-reaction device, a third tubular reaction device, a fourth tubular reaction device, a second suction filtration and dispersion device, a third suction filtration and dispersion device, a first reaction product storage tank, a second homogenization treatment device, a third homogenization treatment device and a second reaction product storage tank; a static mixer is arranged inside a material conveying tube. Modified aminated grapheneproduced by using the device is small in piece size, narrow in piece diameter distribution, high in single layer rate, free of pollution in a production process, and a raw material base is provided for on-scale application of the aminated graphene.

The invention relates to a pre-dispersion and mixing process for graphene oxide in the process of internal mixing. The pre-dispersion and mixing process is characterized by comprising the following steps: (1) dissolving graphene oxide in water so as to obtain an aqueous graphene oxide solution with a mass percentage concentration of 0.2 to 0.3%; (2) subjecting the aqueous graphene oxide solution to ultrasonic treatment for 1 to 2 h, wherein ultrasonic power is 500 to 1500 W; and (3) carrying out multi-stage mixing on a tabletted rubber compound, wherein the surface of the rubber compound is uniformly covered with the aqueous graphene oxide solution before each stage of mixing, and blow-drying by a drying system and blanking are carried out before mixing. The aqueous graphene oxide solution is maintained neutral. In the step (3), the surface of the rubber compound is uniformly covered with the aqueous graphene oxide solution in such a manner that the rubber compound is immersed in the aqueous graphene oxide solution treated in the step (2). The process provided by the invention can greatly improve the dispersity of graphene oxide in a mixed rubber compound, so dispersion of graphene oxide in the mixed rubber compound is greatly improved.

The invention relates to a graphene film growth substrate and a preparation method and application thereof. The preparation method of the graphene film growth substrate comprises the following steps: providing a copper foil substrate, wherein the copper foil substrate is provided with a first surface and a second surface opposite to the first surface; performing protective film pasting treatment on the first surface, and performing oxidation treatment on the second surface to prepare an intermediate I; and removing the protective film to expose the first surface. The method is simple to operate, can reduce the content of carbon impurities in the substrate, remarkably improves the single-layer rate of graphene, can be carried out in a roll-to-roll manner on a large scale, can remarkably improve the production efficiency of the copper foil substrate of the substrate, can be used for preparing the copper foil substrate on a large scale, and is combined with a preparation method of a large-scale graphene film, so that the production cost is reduced. And the production efficiency of the graphene film is improved.

The invention discloses a method for quickly preparing high-performance graphene. The method comprises the steps of putting graphite oxide into a reactor, vacuumizing the reactor, treating the graphite oxide by three-stage gradient microwave radiation, and peeling off the graphite oxide expanded with heat, thus obtaining high-performance graphene. The method has the advantages of high production efficiency, low production cost, high safety and reliability in the operation process and high product quality.