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Large-scale graphene transferring method

A graphene and viscous technology, applied in the field of large-scale transfer of graphene, can solve the problems of loss of light transmittance of transparent adhesives, rough copper foil, poor light transmittance, etc., to achieve wide application potential, high light transmittance, good performance effect

Inactive Publication Date: 2017-05-17
DEYANG CARBONENE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that due to the roughness of the copper foil used to prepare graphene, the graphene surface transferred by this method completely replicates the surface morphology of the copper foil, resulting in a large haze. In addition, the transparent adhesive itself has a certain amount of light transmission. rate loss, so making its light transmittance poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for transferring graphene on a large scale, comprising the following steps:

[0028] (1) Bond the viscous dissolvable film with anti-adhesive layer to the graphene of copper foil by pressing, hot pressing or vacuum hot pressing. The bonding temperature is 100-120°C. After bonding, copper Structure of foil / graphene / adhesive dissolvable film / release layer. Wherein, the release layer is a release film or a protective film, and its peeling force is less than 5g / cm 2 .

[0029] In this step, the viscous dissolvable film includes, but is not limited to, thermal release adhesive, photosensitive adhesive, hot melt adhesive, pressure sensitive adhesive or reactive adhesive and the like. The dissolvable adhesive film must be sufficiently flexible or flowable at high temperature.

[0030] (2) Separate the copper foil by using methods such as etching, electrochemical etching, electrolytic bubbling peeling, ultrasonic peeling or hot water peeling in the prior art, and cl...

Embodiment 2

[0035] A method for transferring graphene on a large scale, comprising the following steps:

[0036] (1) Lay the hot melt adhesive film TPU with release film on the graphene of the copper foil by pressing, hot pressing or vacuum hot pressing. The thickness of the hot melt adhesive TPU is 15 μm, and the laminating temperature is 100℃, pressure 0.1MPa / cm 2 , the peel force of the release film is less than 5g / cm 2 , after bonding, the structure of copper foil / graphene / adhesive dissolvable film / release film is obtained.

[0037] (2) Use the method of electrolytic bubbling stripping to separate the copper foil. The conditions of electrolytic bubbling stripping are: in 0.4M NaOH solution, the anode is platinum, the cathode is copper foil, the bubbling voltage is 2A, and the copper foil is separated and cleaned. , to obtain the structure of graphene / adhesive dissolvable film / release film.

[0038] (3) Bond the graphene / adhesive dissolvable film / release film to the target substrate...

Embodiment 3

[0044] A method for transferring graphene on a large scale, comprising the following steps:

[0045] (1) Attach the hot melt adhesive film EVA with a protective film to the graphene of the copper foil by pressing, hot pressing or vacuum hot pressing. The thickness of the hot melt adhesive film EVA is 15 μm, and the bonding temperature is 120℃, pressure 0.1MPa / cm 2 , the peel force of the protective film is less than 5g / cm 2 , after bonding, the structure of copper foil / graphene / adhesive dissolvable film / protective film is obtained.

[0046] (2) Use the method of electrolytic bubbling stripping to separate the copper foil. The conditions of electrolytic bubbling stripping are: in 0.4M NaOH solution, the anode is platinum, the cathode is copper foil, the bubbling voltage is 2A, and the copper foil is separated and cleaned. , resulting in a graphene / adhesive dissolvable film / protective film structure.

[0047] (3) Bond the graphene / adhesive soluble film / protective film to the ...

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Abstract

The invention discloses a large-scale graphene transferring method, which comprises the following steps: (1) bonding a viscous soluble film with an anti-sticking layer to graphene of a copper foil to obtain a copper foil / graphene / viscous soluble film / anti-sticking layer structure; (2) separating the copper foil to obtain a graphene / viscous soluble film / anti-sticking layer structure; (3) bonding the graphene / viscous soluble film / anti-sticking layer to a target substrate to obtain a target substrate / graphene / viscous soluble film / anti-sticking layer structure; (4) removing the anti-sticking layer to obtain a target substrate / graphene / viscous soluble film structure; (5) dissolving the viscous soluble film to obtain graphene adhered to the target substrate to complete the transfer. The graphene can be transferred cleanly without damage, the graphene cannot be damaged in the transfer process, and the obtained graphene has relatively high performances and relatively high quality.

Description

technical field [0001] The invention belongs to the field of graphene, and in particular relates to a method for large-scale transfer of graphene, which can transfer graphene in a continuous industrialized and clean and non-destructive manner. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms with only one atomic thickness. In 2004, Andre Geim and Konstantin Novoselov, physicists at the University of Manchester, successfully separated graphene from graphite and confirmed that it can exist alone. Bell Prize in Physics. Before its discovery in 2015, graphene was both the thinnest and strongest material, with a breaking strength 200 times higher than the best steel. At the same time, it has good elasticity, and the stretching range can reach 20% of its own size. It is currently the thinnest and strongest material in nature. If a piece of graphene with an area of ​​1 square meter is used to make a hammock, it can bear a cat weighing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/194
CPCC01B2204/20C01B2204/22
Inventor 牟舜禹高华姚林简璐
Owner DEYANG CARBONENE TECH
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