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Method of surface self-assembly of graphene/polyimide transparent electric conduction film

A transparent conductive film, polyimide technology, applied in cable/conductor manufacturing, conductive layers on insulating carriers, circuits, etc., can solve the incompatibility between inorganic conductive layers and organic substrates, flexible substrates and deposition layers. Weak adhesion and other problems, to achieve the effect of improving incompatibility, firm interface bonding, and good transmittance

Active Publication Date: 2012-07-18
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention will solve the technical problems of weak adhesion between the flexible substrate and the deposition layer in the existing flexible conductive film, and the incompatibility of the inorganic conductive layer and the organic substrate; and provide the surface self-assembled graphene / polyimide transparent conductive film Methods

Method used

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  • Method of surface self-assembly of graphene/polyimide transparent electric conduction film
  • Method of surface self-assembly of graphene/polyimide transparent electric conduction film

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specific Embodiment approach 1

[0014] Specific embodiment one: the method for surface self-assembled graphene / polyimide transparent conductive film in the present embodiment is carried out according to the following steps:

[0015] Step 1. Put 0.05~0.1g of graphite oxide with a mass purity of more than 99.9% into 100mL of N,N-dimethylacetamide (DMAc) or N-methylpyrrolidone (NMP), ultrasonically disperse for 60min, and then add A reducing agent, the reduction reaction is carried out at 120-130° C. for 1-2 hours to obtain a graphene organic solution system (the graphene organic solution system is stored at room temperature for more than 30 days);

[0016] Step 2, gradually add 0.02mol aromatic dianhydride monomer and 0.02mol aromatic diamine monomer into 100mL N,N-dimethylacetamide (DMAC) solvent, mechanically stir for 5 hours in an inert atmosphere (intrinsic viscosity reaches 40dL / g), thereby obtaining PAA solution;

[0017] Step 3, the graphene organic solution system obtained in step 1 and the PAA soluti...

specific Embodiment approach 2

[0018] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the graphite oxide described in Step 1 is obtained by oxidizing natural flake graphite by chemical oxidation. Other steps and parameters are the same as in Embodiment 1

specific Embodiment approach 3

[0019] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the reducing agent in step 1 is hydrazine or sodium borohydride, the amount of hydrazine is 1 mL, and the amount of sodium borohydride is 0.1 g. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a method of surface self-assembly of graphene / polyimide transparent electric conduction film, and relates to a preparation method of the graphene / polyimide transparent electric conduction film. The invention aims to solve the technical problems that the adhesive force of a flexible substrate and a settled layer in the existing flexible electric conduction film is weak, and an inorganic electric conduction layer and an organic base are incompatible. The method comprises the following steps: firstly, placing graphite oxide respectively in N,N-dimethyl acetamide or N-methyl pyrrolidone, carrying out ultrasonic dispersion, adding a reducing agent, and carrying out reduction reaction, thereby obtaining a graphene organic solution system; secondly, adding a dianhydride monomer and a diamine monomer in N, N-dimethyl acetamide, and stirring in an inert atmosphere, thereby obtaining a PAA (poly acrylic acid) solution; and thirdly, mixing and stirring the graphene organic solution system and the PAA solution, then coating on a clean and dry glass plate, volatilizing the solvent and curing. The surface resistance of the graphene / polyimide transparent electric conduction film prepared by the method provided by the invention is 10-20 omega, and the graphene / polyimide transparent electric conduction film has favorable light transmissivity at the visible light wave band and the near-infrared wave band.

Description

technical field [0001] The invention relates to a preparation method of a graphene polyimide transparent conductive film. Background technique [0002] Transparent conductive film is a kind of film that can conduct electricity and has high transparency in the visible light range. At present, it includes: metal system, oxide film system (TCO), other compound film system, polymer film system, composite film system, etc. Among them, the first two are the most widely used. Transparent conductive films are widely used in the fields of window materials for optoelectronic devices (such as LEDs, thin visible light film solar cells, etc.) due to their high transmittance in the range and conductivity close to that of metals. Common transparent conductive films are ITO (tin-doped indium trioxide), AZO (aluminum-doped zinc oxide), etc., which have a large band gap and only absorb ultraviolet light, not visible light, so they are called "transparent". The main conductive thin films cur...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B5/14
Inventor 李垚牛永安赵九蓬吴洁
Owner HARBIN INST OF TECH
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