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: 2014-07-09
BEIJING INSTITUTE OF TECHNOLOGYGY +2
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  • 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
Comparison scheme
Effect test

Embodiment 1

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

[0034] Step 1: Ultrasonic defoaming of the CNFs solution for 5 min to obtain a CNFs casting solution with a mass fraction of 0.10%;

[0035] Step 2: Pour the film casting liquid obtained in Step 1 into a flat-bottomed container, seal it and put it into an oven at 30°C, and 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 of 7.00. 3 After taking out the solution, the film was washed with deionized water and air-dried 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 was i...

Embodiment 2

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

[0043] Step 1: Ultrasonic defoaming of the CNFs solution for 30 min to obtain a casting solution with a mass fraction of CNFs of 0.23%;

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

[0045] Step 3: Immerse the CNFs membrane obtained in Step 2 into CuCl at a temperature of 30 °C and a concentration of 0.0157 mol / L (pH value of 4.66). 2 After taking out the solution, rinse 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 as the above CuCl. 2 The pH value of the solution (4.66) ...

Embodiment 3

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

[0052] Step 1. Ultrasonic defoaming of the CNFs solution for 1 h to obtain a casting solution with a mass fraction of CNFs of 0.27%;

[0053] Step 2, pour the film casting liquid 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 membrane obtained in Step 2 into AlCl at a temperature of 70 °C and a concentration of 0.0371 mol / L (pH value of 4.02). 3 After taking out the solution, rinse the film with deionized water and dry it with air;

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

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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 makes them have broad application prospects in the fields of communication, electro-drive, energy and sensors. Compared with traditional transparent conductive films, flexible transparent conductive films not only have excellent light transmittance and electrical conductivity, but also have the advantages of flexibility, light weight, low cost and mass production. The current flexible transparent conductive films are generally prepared by depositing conductive materials on polymer substrates (Anshan Huahui Optical Electronic Materials Technology Co., Ltd., Liaoning Universit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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