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Preparation of PET/graphene transparent conductive film by chemical grafting and coating processing

A technology of transparent conductive film and chemical grafting, which is applied in cable/conductor manufacturing, carbon-silicon compound conductors, circuits, etc. It can solve problems such as inability to achieve long-term modification effects, functional failure of flexible devices, and cracking of graphene conductive layers. , to achieve the effect of uniform film thickness and uniformity of film formation, improved adhesion and good conductivity

Active Publication Date: 2016-12-14
GUANGDONG NANOLUTION SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The substrate material used in the existing flexible curved surface equipment is mostly polyethylene terephthalate (PET) film, PET macromolecular chain structure is regular, the crystallinity is high, and there is no strong polar group in the molecule , so its surface affinity is poor
At present, when the graphene transparent conductive film using PET substrate as a flexible substrate undergoes multiple bending deformations, the graphene conductive layer will crack to a certain extent or even fall off from the PET surface, resulting in the failure of the flexible device function and low yield. , which limits the further application of graphene transparent conductive films
At present, the surface treatment methods of PET substrates mainly include surface coating method, surface oxidation method, plasma method, high-energy radiation, etc., but these all affect the bulk performance of PET or cannot achieve long-term modification effect.

Method used

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  • Preparation of PET/graphene transparent conductive film by chemical grafting and coating processing

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1) Impurity removal on the surface of the PET substrate: Clean the 100um optical grade double-sided hardened PET substrate with a mixed solvent with a volume ratio of absolute ethanol / acetone of 1, and then rinse the residual mixed solvent on the surface of the PET substrate with distilled water, 80 After vacuum drying at ℃, a PET base material with a clean surface is obtained;

[0026] Step 2) Preparation of graphene mixed solution: 0.6g of silane coupling agent KH-580 was added to 0.1 mg / ml graphene ethanol solution, and after magnetic stirring at 60°C for 90min, graphene mixed solution was prepared;

[0027] Step 3) Preparation of transparent conductive film: apply the graphene mixed solution prepared in step 2) evenly and densely on the surface-clean PET substrate obtained in step 1) by means of micro-gravure coating, and bake at 60°C for 60min , to obtain a PET / graphene transparent conductive film with a thickness of 30nm.

Embodiment 2

[0029] Step 1) Impurity removal on the surface of the PET substrate: Clean the 100um optical grade double-sided hardened PET substrate with a mixed solvent with a volume ratio of absolute ethanol / acetone of 1, and then rinse the residual mixed solvent on the surface of the PET substrate with distilled water, 80 After vacuum drying at ℃, a PET base material with a clean surface is obtained;

[0030] Step 2) Preparation of graphene mixed solution: 1.2 g of silane coupling agent KH-580 was added to 0.5 mg / ml graphene ethanol solution, and after magnetic stirring at 90° C. for 60 min, graphene mixed solution was prepared;

[0031] Step 3) Preparation of transparent conductive film: apply the graphene mixed solution prepared in step 2) uniformly and densely on the surface-clean PET substrate obtained in step 1) by means of micro-gravure coating, and bake at 90°C for 45min , to obtain a PET / graphene transparent conductive film with a thickness of 50nm.

Embodiment 3

[0033] Step 1) Cleaning the surface of the PET substrate: Clean the 125um optical-grade double-sided hardened PET substrate with a mixed solvent with a volume ratio of absolute ethanol / acetone of 1, and then rinse the residual mixed solvent on the surface of the PET substrate with distilled water, 80 After vacuum drying at ℃, a PET base material with a clean surface is obtained;

[0034] Step 2) Preparation of graphene mixed solution: 0.6g of silane coupling agent KH-580 was added to 0.1 mg / ml graphene ethanol solution, and after magnetic stirring at 60°C for 90min, graphene mixed solution was prepared;

[0035] Step 3) Preparation of transparent conductive film: apply the graphene mixed solution prepared in step 2) evenly and densely on the surface-clean PET substrate obtained in step 1) by means of micro-gravure coating, and bake at 60°C for 60min , to obtain a PET / graphene transparent conductive film with a thickness of 30nm.

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Abstract

The invention relates to the technical field of a flexible and transparent conductive thin film, and in particular to preparation of a PET / graphene transparent conductive film by chemical grafting and coating processing. The preparation comprises the following steps of selecting an optical-grade coating PET substrate subjected to double-sided hardened layer processing as a PET substrate, processing the PET substrate by using a mixed solvent of acetone and ethanol, washing the PET substrate with distilled water, and drying the PET substrate; adding 0.1-15g of a coupling agent to a graphene ethanol solution with a concentration of 0.01-15mg / ml, rising a temperature to 40-180 DEG C, and stirring the mixed solution for 30-250 minutes to obtain a graphene mixed solution; and uniformly and densely coating the graphene mixed solution on the PET substrate with a clean surface by a mode of fine coating, and braking the PET substrate for 15-150 minutes at 40-180 DEG C to prepare the PET / graphene transparent conductive film. The transparent conductive thin film has high adhesive force and favorable conductivity, and the flexibility resistance is improved; and meanwhile, the transparent conductive thin film is high in maneuverability and production efficiency, and roll-to-roll industrial production is liable to achieve.

Description

technical field [0001] The invention relates to the technical field of flexible transparent conductive films, in particular to the preparation of a chemically grafted and coated PET / graphene transparent conductive film. Background technique [0002] Transparent conductive film is a film with both electrical conductivity and high light transmittance, and is widely used in the fields of electronic components such as liquid crystal displays, touch panels and solar cells. At present, indium tin oxide (ITO) is the main material used in the industry to prepare transparent conductive films, but its metal resource reserves are less and less, and indium metal is toxic and chemically unstable, so the prepared conductive films are difficult to bend and use. With the wide application of electronic devices, people's demand for flexible products such as mobile terminals, wearable devices, and smart home appliances in the future is increasing, and it is urgent to find a new flexible transp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B1/04
CPCH01B1/04H01B13/00
Inventor 段镶锋段曦东李晓丰毛志浩
Owner GUANGDONG NANOLUTION SCI & TECH CO LTD
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