Preparation methods of flexible substrate-based graphene film and flexible substrate-based graphene composite film

A graphene film and flexible substrate technology, which is applied in the field of preparation of graphene and its composite film, can solve the problems of difficult large-area preparation, limited film area by devices, and high preparation cost, achieves good flexibility and flatness, and facilitates peeling and transfer, easy to operate effects

Inactive Publication Date: 2013-08-28
卫辉市卓力科技有限公司
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods used to prepare graphene films mainly include spin coating, spray coating, suction filtration, and chemical vapor deposition (CVD), among which spin coating is a commonly used operation method in laboratories, and can only prepare small-area graphene films. Graphene film, and the thickness distribution of the prepared film is uneven, and the requirements for the solution are relatively strict; the spraying method has complicated operation steps and relatively high preparation costs, which is not conducive to large-scale industrial production; the suction

Method used

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  • Preparation methods of flexible substrate-based graphene film and flexible substrate-based graphene composite film

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Pour 300ml of a graphene oxide aqueous solution with a mass concentration of 0.1mg / ml on, for example, commercial printing paper of A4 size, use a stainless steel rod rolling method to make it flow and form a uniformly covered film layer on the entire surface of the drawing paper , and then perform drying and curing treatment, thereby obtaining graphene oxide paper;

[0031] On the surface of the graphene oxide film layer of the graphene oxide paper, the polydimethylsiloxane (PDMS) liquid is also rolled and covered with a stainless steel rod to obtain a PDMS layer, and it is placed at 80-90 degrees perform curing;

[0032] At room temperature, the graphene oxide paper coated with polydimethylsiloxane layer was soaked in 45% hydroiodic acid to perform the reduction reaction. During the reduction process, the printing paper was hydrolyzed and simultaneously reacted with hydrogen The acid reacts to generate air bubbles, thereby impelling the graphene film layer combined w...

Embodiment 2

[0034] Pour 300ml of graphene oxide aqueous solution with a mass concentration of 10mg / ml on commercial printing paper of A4 size, use a stainless steel rod rolling method to make it flow and form a layer of evenly covered film on the entire surface of the drawing paper, Then perform a drying and curing process, thereby obtaining graphene oxide paper;

[0035]On the surface of the graphene oxide film layer of the graphene oxide paper, the polydimethylsiloxane (PDMS) liquid is also rolled and covered with a stainless steel rod to obtain a PDMS layer, and it is placed at 80-90 degrees perform curing;

[0036] At room temperature, the graphene oxide paper coated with polydimethylsiloxane layer was soaked in 50% hydroiodic acid to perform the reduction reaction. During the reduction process, the printing paper was hydrolyzed and simultaneously reacted with hydrogen iodide The acid reacts to generate air bubbles, thereby impelling the graphene film layer combined with the polydime...

Embodiment 3

[0038] Add 50 mg of multi-walled carbon nanotubes to 40 ml of graphene oxide aqueous solution with a mass concentration of 2 mg / ml and perform ultrasonic dispersion for 2 hours to obtain a mixed solution. The mixed solution is coated on a flat surface with a specification of 40 cm* by a coating roller. 40cm kraft paper, and form a layer of uniformly covered composite film on the entire surface, and then perform drying and curing treatment;

[0039] Coating a polydimethylsiloxane layer on the surface of the graphene oxide / carbon nanotube composite film layer of the kraft paper, and performing curing treatment on it;

[0040] The kraft paper bearing the graphene oxide / carbon nanotube composite film layer and the polydimethylsiloxane layer was soaked in 55% hydroiodic acid to perform the reduction reaction. During the reduction process, the kraft paper was hydrolyzed and simultaneously Reacting with hydriodic acid generates bubbles, thereby impelling the graphene / carbon nanotube ...

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Abstract

The invention discloses a preparation method of a flexible substrate-based graphene film. The preparation method comprises the following steps of coating a graphene oxide aqueous solution on a paper base material to obtain a uniform graphene oxide film, carrying out drying curing treatment, coating a polydimethylsiloxane (PDMS) layer on the surface of the graphene oxide film, carrying out curing treatment, and dipping the treated paper base material into hydroiodic acid for a reduction reaction, wherein in the reduction reaction, the treated paper base material undergoes a hydrolysis reaction under the acid conditions and simultaneously, reacts with the acid to produce bubbles so that the graphene oxide film is automatically separated from the paper base material and the flexible substrate-based graphene film product is obtained. The invention also discloses a preparation method of a flexible substrate-based graphene composite film. The methods realize graphene reduction without a high temperature condition or a toxic reduction reagent, conveniently and fast realize film stripping and transfer and are especially suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of graphene preparation, and more specifically relates to a method for preparing graphene based on a flexible substrate and a composite film thereof. Background technique [0002] In recent years, with the rapid increase in demand for consumer electronics, flexible, lightweight and portable electronic devices (such as rollable displays, wearable electronics, etc.) have become a research hotspot. Flexible electronics have great application prospects in wearable display elements, artificial skin, and distributed sensors. Graphene is a honeycomb-like two-dimensional lattice structure carbon nanomaterial with carbon atoms tightly packed in sp2 hybrid system. Low cost and other characteristics are expected to be widely used in flexible electronics, energy storage, electrochemical sensing and other fields. [0003] In these applications, graphene usually needs to be used in thin film form and transferred to flex...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/184
Inventor 王帅张哲野杨圣雄
Owner 卫辉市卓力科技有限公司
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