Novel flexible conductive composite film and preparation method thereof

A composite film, a new type of technology, applied in the field of electrochemistry, can solve the problems of low conductivity and small capacitance value, and achieve the effect of high conductivity, large capacitance value and stable material structure

Active Publication Date: 2018-08-10
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 eas

Method used

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  • Novel flexible conductive composite film and preparation method thereof
  • Novel flexible conductive composite film and preparation method thereof
  • Novel flexible conductive composite film and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1B

[0037] The preparation of embodiment 1BC / PPy / SWCNTs composite film

[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 dialysi...

Embodiment 2B

[0045] The preparation of embodiment 2BC / PPy / SWCNTs composite film

[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...

Embodiment 3B

[0053] The preparation of embodiment 3BC / PPy / SWCNTs composite film

[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...

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Abstract

The invention provides a novel flexible conductive composite film and a preparation method thereof. The novel flexible conductive composite film is mainly prepared by compounding bacterial cellulose,polypyrrole and a single-walled carbon nanotube material. The invention belongs to the field of electrochemistry. The preparation method disclosed by the invention mainly comprises the following steps: adding a BC nanofiber suspension into a mixed solution A mixed with hydrochloric acid and ferric chloride, performing ultrasonic treatment, adding a PPy monomer to be mixed so as to obtain BC/PPy composite slurry; dialyzing by a dialysis bag, adding single-walled carbon nanotubes and the like according to a certain volume ratio, stirring, performing suction filtration and film formation, so as to obtain the BC/PPy/SWCNTs composite film. The requirements of flexible electronic equipment on elastic stretching and bending properties of the material are met, and the material is stable in structure, high in conductivity and high in capacitance. Moreover, the preparation method is simple and feasible, and the composite film has great application prospects and high market value.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a novel 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...

Claims

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Application Information

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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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