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Preparation method of cellulose nanofiber-based flexible transparent conductive membrane

A transparent conductive film and nanofiber technology, which is applied in the direction of cable/conductor manufacturing, conductive layer on insulating carrier, circuit, etc., can solve the problems of poor matching of thermal expansion coefficient, etc., and achieve small thermal expansion coefficient, high light transmittance, and flexibility Good results

Inactive Publication Date: 2012-10-17
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for preparing a cellulose nanofiber-based flexible transparent conductive film in order to solve the problem of poor matching between the thermal expansion coefficients of the substrate and the conductive layer in the existing flexible transparent conductive film

Method used

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  • Preparation method of cellulose nanofiber-based flexible transparent conductive membrane
  • Preparation method of cellulose nanofiber-based flexible transparent conductive membrane
  • Preparation method of cellulose nanofiber-based flexible transparent conductive membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0033] A method for preparing a cellulose nanofiber-based flexible transparent conductive film, the specific steps are as follows:

[0034] Step 1, ultrasonically degassing the CNFs solution for 5 minutes to obtain a CNFs casting solution with a mass fraction of 0.10%;

[0035] Step 2. Pour the film-casting solution obtained in step 1 into a flat-bottomed container, seal it and put it in an oven at 30°C to obtain a CNFs film after the solvent is completely evaporated;

[0036] Step 3: Immerse the CNFs film obtained in Step 2 into AgNO with a temperature of 10°C, a concentration of 0.1013 mol / L, and a pH value of 7.00 3 solution, after taking it out, wash the film with deionized water and dry it with air to obtain CNFs / Ag + membrane;

[0037] Step 4. Adjust the pH value of the GO solution with a concentration of 1 mg / mL to the same as the above AgNO 3 The pH value of the solution is the same, that is, the pH value is 7.00; then the CNFs / Ag obtained in step 3 + The membrane ...

Embodiment 2

[0042] A method for preparing a cellulose nanofiber-based flexible transparent conductive film, the specific steps are as follows:

[0043] Step 1, ultrasonically degassing the CNFs solution for 30 minutes to obtain a casting solution with a mass fraction of CNFs of 0.23%;

[0044]Step 2. Pour the casting solution obtained in step 1 into a polypropylene watch glass, control the liquid level of the casting solution in the watch glass to be 1.3 cm, seal it and put it in an oven at 40°C after standing for a period of time. After the solvent is completely evaporated, the CNFs film is obtained;

[0045] Step 3. Immerse the CNFs film obtained in Step 2 into CuCl with a temperature of 30°C and a concentration of 0.0157mol / L (pH value 4.66). 2 solution, after taking it out, wash the film with deionized water and dry it with air;

[0046] Step 4, adjust the pH value of the GO solution with a concentration of 8.7 mg / mL to the same value as the above CuCl 2 The pH value (4.66) of solu...

Embodiment 3

[0051] A method for preparing a cellulose nanofiber-based flexible transparent conductive film, the specific steps are as follows:

[0052] Step 1, ultrasonically degassing the CNFs solution for 1 hour to obtain a casting solution with a mass fraction of CNFs of 0.27%;

[0053] Step 2. Pour the casting solution obtained in step 1 into a flat-bottomed container, evaporate naturally, and obtain a CNFs film after the solvent is completely evaporated;

[0054] Step 3. Immerse the CNFs film obtained in Step 2 into AlCl with a temperature of 70°C and a concentration of 0.0371mol / L (pH value 4.02) 3 solution, after taking it out, wash the film with deionized water and dry it with air;

[0055] Step 4, adjusting the pH value of the GO solution with a concentration of 3.5 mg / mL to the same level as the above-mentioned AlCl 3 The pH value (4.02) of solution is identical, then the CNFs / Al of step 3 gained 3+ The membrane was immersed in GO solution at a temperature of 70°C, and after ...

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Abstract

The invention relates to a preparation method of a cellulose nanofiber-based flexible transparent conductive membrane. Cellulose nanofibers (CNFs) solution is prepared by utilizing TEMPO catalytic oxidation method, a colorless transparent CNFs membrane is obtained after the solvent is completely evaporated, then a layer-by-layer self-assembling technology is adopted to alternately deposit metal ions (or polymer positive ions) and graphene oxide (GO) on the CNFs membrane to prepare a CNFs / RGO film, and finally hydroiodic (HI) acid is used for reducing the GO to reduced graphene oxide (RGO) to obtain the CNFs / RGO flexible transparent conductive membrane. The density of the CNFs membrane is 1.6g*cm<-3>, the light transmission rate at 550nm is 89.2 percent, and the heat expansion coefficient is 8.5ppm*k-1; and the range of the light transmission rate at the position of 550nm is 50.4 to 77.1 percent, the range of a square resistor is 0.76 to 13.79 kilo ohm / sq, and the range of the heat expansion coefficient is 5.03 to 8.24ppm*K-1.

Description

technical field [0001] The invention relates to a flexible transparent conductive film of an organic substrate, in particular to a preparation method of a cellulose nanofiber-based flexible transparent conductive film, and belongs to the field of flexible transparent conductive films. Background technique [0002] The application of flexible transparent conductive films in flexible optoelectronic devices has broad application prospects in the fields of communication, electro-actuation, energy and sensors. Compared with traditional transparent conductive films, flexible transparent conductive films not only have excellent light transmission and conductivity, but also have the advantages of flexibility, light weight, low cost and mass production. The current flexible transparent conductive film is generally prepared by depositing conductive materials on a polymer substrate (Anshan Huahuiguang Electronic Material Technology Co., Ltd., Liaoning University of Science and Technolo...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B5/14
Inventor 邵自强高可政吴雪王文俊赵立金王飞俊李永红李玉成
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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