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Multi-layer stacking and transferring method for graphene

A transfer method, a multi-layer stacking technology, applied in graphene, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of low transfer efficiency, complicated operation process, deterioration of uniformity, etc.

Active Publication Date: 2016-06-01
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are problems such as complex operation process, easy damage of graphene, low transfer efficiency, high cost, pollution of copper-dissolving waste liquid, etc.
In addition, CVD-grown graphene has a high square resistance and cannot be directly applied. It must be doped to reduce the square resistance, and the small molecule dopants used for doping, such as ethylenediamine, nitric acid, chloroauric acid, etc., are different from The force of graphene is weak, and it is easy to volatilize and migrate. During the placement process, the square resistance of graphene increases continuously, and the uniformity deteriorates, which seriously limits the practical application of graphene.

Method used

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  • Multi-layer stacking and transferring method for graphene
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  • Multi-layer stacking and transferring method for graphene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] This embodiment is a graphene multilayer stack transfer method involved in the present invention, and the specific steps are as follows:

[0022] Step S01, coating polydimethylsiloxane (PDMS) on the surface of the target substrate polyethylene terephthalate (PET) 01, heating, curing and drying to form an elastic transparent coating 02 with a thickness of about 15 microns, Form the composite structure of PET / PDMS 1 such as figure 2 ;

[0023] In step S02, the composite structure 1 obtained in step S01 is rolled and laminated with the grown graphene 03, the pressure is 0.2Mpa, and the heating temperature is 50°C to form a composite structure 2 of PET / PDMS / graphene / copper foil substrate. image 3 ;

[0024] Step S03, pressurize and bond the composite structure 2 obtained in step S02 again, the pressure is 0.5MPa, and at the same time, apply a current of 4A, immerse in the aqueous electrolyte solution, and bubbling with electricity to separate the graphene 03 from the gr...

Embodiment 2

[0029] This embodiment is a graphene multilayer stack transfer method involved in the present invention, and the specific steps are as follows:

[0030] Step S01, coating dimethylsiloxane and diphenylsiloxane copolymer on the surface of the target substrate polyethylene terephthalate (PET) 01, heating, curing and drying to form an elastic layer with a thickness of about 15 microns Clearcoat 02, forming a composite structure of PET target substrate / copolysiloxane elastic clearcoat 1 as figure 2 ;

[0031] Step S02, rolling and bonding the composite structure 1 obtained in step S01 with the grown graphene 03, the pressure is 0.3Mpa, and the heating temperature is 80°C to form a PET target substrate / copolysiloxane elastic transparent coating / graphene / copper Foil-based composite structures 2 such as image 3 ;

[0032] Step S03, pressurize and bond the composite structure 2 obtained in step S02 again, the pressure is 0.1MPa, and at the same time, apply a current of 3A, immerse...

Embodiment 3

[0037] This embodiment is a graphene multilayer stack transfer method involved in the present invention, and the specific steps are as follows:

[0038] Step S01, coating the copolymer solution of methyl methacrylate, butyl acrylate, isooctyl methacrylate and tetrahydrofuryl acrylate on the surface of the target substrate (PET) 01, heating, curing and drying to form an elastic transparent film with a thickness of about 30 microns Coat 02, resulting in a composite structure of PET target substrate / copolyacrylate elastic clear coat 1 as figure 2 ;

[0039] Step S02, roll and pre-laminate the composite structure 1 obtained in step S01 with the grown graphene 03, the pressure is 0.5Mpa, and the heating temperature is 90°C to form a PET target substrate / copolyacrylate elastic transparent coating / graphene / copper Foil-based composite structures 2 such as image 3 ;

[0040] In step S03, press and bond the composite structure 2 described in step S02 again, the pressure is 0.8MPa, ...

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Abstract

The invention relates to a multi-layer stacking and transferring method for graphene. The method includes the operation steps that S01, the bottom face and the surface of a transferring target substrate are coated with an elastic transparent coating; S02, thermo-compression bonding is conducted on copper foil where graphene grows and the coated elastic transparent coating in a rolling mode; S03, the obtained compressed structure continues to be soaked in an electrolyte solution through rolling pressing, and electricity is applied for bubbling at the same time so that graphene and copper coil can be separated, attached and transferred to the target substrate; S04, washing and blow-drying are conducted on the surface of transferred graphene; S05, the step S02, the step S03 and the step S04 are repeatedly executed, graphene is stacked and transferred on the surface of transferred graphene till graphene is stacked to the required level number. Rapid and complete transferring of graphene is achieved by coating the graphene transferring target substrate with the elastic coating for modification and through the electrochemistry bubbling stripping method, multiple layers of stacked graphene are transferred according to practical requirements, and the electrical property uniformity and stability of graphene are improved.

Description

technical field [0001] The invention relates to a graphene multilayer stack transfer method, which belongs to the technical field of graphene production. Background technique [0002] Graphene is a two-dimensional nanomaterial discovered in recent years, which has many excellent properties. Among them, the extremely high transmittance and ultra-high carrier mobility make it a new transparent conductive material that has attracted the attention of the industry. [0003] The existing mature method for the large-scale preparation of graphene is chemical vapor deposition (CVD). The CVD method generally uses opaque metals as growth substrates, such as copper foil and nickel foil. However, in practical applications, it is usually necessary to transfer graphene to other substrates, such as flexible and transparent PET and PEN substrates. The existing graphene transfer method needs to use excessive support materials, such as PMMA, silica gel film, thermo-release tape, etc., and co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
CPCC01B2204/04
Inventor 姜浩马金鑫高翾徐鑫李朝龙李占成史浩飞
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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