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Transfer method of graphene film

A technology of graphene film and transfer method, which is applied in the field of carbon materials, can solve the problems that adhesive tape and graphene cannot be perfectly bonded, increase the surface roughness of graphene, and is not suitable for large-scale production. It is easier to achieve large-area transfer, Improve the transfer efficiency and achieve the effect of large-scale and large-scale industrialization

Pending Publication Date: 2022-06-03
BEIJING GRAPHENE INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polymer-assisted transfer can completely transfer graphene to the target metal substrate, but polymers such as polymethyl methacrylate (PMMA) have a strong interaction with graphene and are not easy to dissolve in solvents. A large amount of residue also greatly increases the surface roughness of graphene. At the same time, this method is not suitable for large-scale production, and it needs a lot of manpower to clean and transfer to the target metal substrate.
The thermal release tape transfer method is easy to operate and can be mass-produced, but due to the rough surface of the copper foil, the tape and graphene cannot be perfectly bonded, which will cause many damages after graphene transfer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A single-layer graphene film grown on an 8cm×8cm copper substrate was selected. Dissolve the rosin in ethyl lactate, the mass content of the rosin is 30%, place the copper foil / graphene film in a gluing machine, and spin the rosin solution on the surface of the graphene film by spin coating at a speed of 1000 / min, The rosin layer / graphene film / copper substrate composite is obtained by curing at room temperature to 25° C. for 2 hours, wherein the thickness of the rosin layer is 10 μm. The PMMA solvent anisole was formed into a solution with a solid content of 4 wt%, and then spin-coated PMMA on the rosin layer / graphene film / copper substrate composite at a speed of 1000 / min, and cured at 110 °C for 20 min to form a PMMA layer with a thickness of 1 μm. A heat release tape is adhered to the surface of the dried PMMA layer to obtain a heat release tape / rosin layer / graphene film / copper substrate composite. Immerse the thermal release tape / rosin layer / graphene film / copper bas...

Embodiment 2

[0040] Except that the target substrate is a PEN substrate, other methods are the same as in Example 1, and the graphene film can also be successfully transferred to the PEN substrate. like Figure 5 As shown, the graphene film transferred onto the PEN substrate was intact and uniform.

Embodiment 3

[0042] Except using 10cm×30cm copper foil as the substrate to produce the graphene film, and using PET as the substrate, other steps and conditions are the same as in Example 1, and the graphene film is transferred to the PET substrate. After observation, it was found that the transferred graphene film had good cleanliness, good integrity and no damage.

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Abstract

The invention discloses a graphene film transfer method which comprises the following steps: forming a micromolecule polymer layer on the surface of a graphene film directly growing on a metal substrate to obtain a micromolecule polymer layer / graphene film / metal substrate complex; forming an organic auxiliary support layer on the micromolecule polymer layer; adhering a heat release adhesive tape layer to the surface of the organic auxiliary supporting layer; removing the metal substrate to obtain a heat release adhesive tape layer / organic auxiliary support layer / small molecule polymer layer / graphene film composite body; the side face of the graphene film of the heat release adhesive tape layer / organic auxiliary supporting layer / small molecule polymer layer / graphene film composite body is attached to a target substrate; heating to remove the heat release adhesive tape layer; and removing the organic auxiliary support layer and the small molecule polymer layer with an organic solvent. According to the transfer method, residues of the organic auxiliary supporting layer on the surface of the graphene film can be prevented from being removed, and the cleanliness of the surface of the graphene film is improved.

Description

technical field [0001] The invention belongs to the field of carbon materials, and in particular relates to a method for transferring graphene films. Background technique [0002] Graphene has a unique structure and excellent light transmission, electrical conductivity, thermal conductivity, flexibility, etc. As a new generation of optoelectronic thin films, it can be widely used in touch screens, solar cells, organic light-emitting diodes, sensors and other fields. As a material with wide application prospects, graphene's chemical vapor deposition (CVD) growth preparation technology is becoming more and more mature, but if graphene is to be applied to the fields of nanoscience and low-dimensional material preparation technology, it must be transferred by transfer. onto the target substrate, and the transfer technique directly affects the quality of graphene and its later characterization applications. The transfer and characterization of graphene has received widespread at...

Claims

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Application Information

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IPC IPC(8): C01B32/194
CPCC01B32/194C01B2204/04C01B2204/02Y02E10/549
Inventor 刘忠范马靖宋雨晴张燕丁庆杰林立
Owner BEIJING GRAPHENE INST