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A kind of flexible conductive composite film and preparation method thereof

A composite membrane and mixed liquid technology, applied in the field of electrochemistry, can solve the problems of low conductivity and small capacitance value, and achieve the effects of high conductivity, large capacitance value and stable material structure.

Active Publication Date: 2020-12-04
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of low electrical conductivity and small capacitance value of BC-PPy film, meet the requirements of flexible electronic devices for elastic stretching and bending of materials, and provide a simple and easy preparation method, stable material structure and high electrical conductivity Electrode materials with large capacitance and capacitance are bound to become the best choice to meet the current consumer market demand for electrode materials

Method used

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  • A kind of flexible conductive composite film and preparation method thereof
  • A kind of flexible conductive composite film and preparation method thereof
  • A kind of flexible conductive composite film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Example 1 Preparation of BC / PPy / SWCNTs composite membrane

[0038] (1) First cut the BC film into small cubes, then use a soymilk machine to beat for 5 minutes, and then disperse at 7000rpm for 10 minutes by a high-speed disperser to make a BC nanofiber suspension with a concentration of 1 mg / mL;

[0039] (2) Add the BC nanofiber suspension to the mixed solution A mixed with hydrochloric acid and ferric chloride, ultrasonically treat it for 15 minutes, and cool to 1°C after stirring for 15 minutes to obtain the mixed solution B; the BC nanofiber suspension The volume ratio with the mixture A is 1:1;

[0040] Wherein, in the mixed solution A, the hydrochloric acid concentration is 1.0mol / L, and the ferric chloride concentration is 8mmol / L.

[0041] (3) Add the Py monomer into the mixed liquid B according to the volume ratio of 0.3:100, and react for 30 minutes at a low temperature of 1-10°C to obtain BC / PPy composite pulp, and pass the composite pulp through a dialysis ...

Embodiment 2

[0045] Example 2 Preparation of BC / PPy / SWCNTs composite membrane

[0046] (1) First cut the BC film into small cubes, then use a soybean milk machine to beat for 10 minutes, and then disperse it at 10,000 rpm for 15 minutes by a high-speed disperser to make a BC nanofiber suspension with a concentration of 3 mg / mL;

[0047] (2) Add the BC nanofiber suspension to the mixed solution A mixed with hydrochloric acid and ferric chloride, ultrasonically treat it for 20min, and cool to 4°C after stirring for 20min to obtain the mixed solution B; the BC nanofiber suspension The volume ratio with the mixture A is 1:4;

[0048] Wherein, in the mixed solution A, the hydrochloric acid concentration is 3.0mol / L, and the ferric chloride concentration is 12mmol / L.

[0049] (3) Add the Py monomer into the mixed liquid B according to the volume ratio of 0.5:100, and react for 300 minutes at a low temperature of 1-10°C to obtain a BC / PPy composite slurry, and pass the composite slurry through a...

Embodiment 3

[0053] Example 3 Preparation of BC / PPy / SWCNTs composite membrane

[0054] (1) First cut the BC film into pieces, then mechanically beat for 7 minutes, and then disperse for 12 minutes at 8500 rpm by a high-speed disperser to make a BC nanofiber suspension with a concentration of 2 mg / mL;

[0055] (2) Add the BC nanofiber suspension to the mixed solution A mixed with hydrochloric acid and ferric chloride, ultrasonically treat it for 16 minutes, and cool to 2.5°C after stirring for 16 minutes to obtain the mixed solution B; the BC nanofiber suspension The volume ratio with the mixture A is 1:1.5;

[0056] Wherein, in the mixed solution A, the concentration of hydrochloric acid is 2.0mol / L, and the concentration of ferric chloride is 10mmol / L.

[0057](3) Add the Py monomer into the mixed solution B according to the volume ratio of 0.4:100, and react at a low temperature of 4°C for 180 minutes to obtain BC / PPy composite pulp, which is removed by dialysis through a dialysis bag w...

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Abstract

The invention provides a flexible conductive composite film and a preparation method thereof, which is mainly composed of bacterial cellulose, polypyrrole and single-wall carbon nanotube materials, and belongs to the field of electrochemistry. In the present invention, the BC nanofiber suspension is mainly added to the mixed liquid A mixed with hydrochloric acid and ferric chloride, and PPy monomer is added after ultrasonic treatment to obtain BC / PPy composite slurry. Adding single-walled carbon nanotubes etc. by volume ratio, stirring, and suction filtration to form a film to obtain a BC / PPy / SWCNTs composite film. The invention not only meets the elastic stretching and bending requirements of flexible electronic equipment, but also has a stable material structure, high electrical conductivity and large capacitance value, and the preparation method is simple and easy, and has great application prospects and market value.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a flexible conductive composite film and a preparation method thereof. Background technique [0002] Bacterial cellulose (hereinafter referred to as BC) is a porous network nano-scale biopolymer polymer synthesized by microbial fermentation. Its interconnected ultrafine structure endows BC with sufficient porosity and specific surface area, which can be used as a support for other functional materials. Matrix material. BC is a polysaccharide linked by β-1,4-glucosidic bonds, its molecular formula is (C 6 h 10 o 5 )n, there are a large number of hydroxyl groups on the surface, abundant hydrogen bonds and three-dimensional structure make BC have high hydrophilicity and water holding capacity. BC has high crystallinity (60-90%) and high degree of polymerization (2000-8000), which makes it have higher Young's modulus and higher tensile strength. BC also has good bioco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/02C08L79/04C08K3/04C08J5/18
CPCC08J5/18C08J2301/02C08J2479/04C08K3/04C08K2201/001C08K2201/011C08L1/02C08L79/04C08K3/041
Inventor 李政董丽攀王福迎丁英杰贾士儒巩继贤张健飞
Owner TIANJIN POLYTECHNIC UNIV
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