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Method for preparing membrane electrode from chitin nano fiber/carbon nanotube composite

A carbon nanotube composite and nanofiber technology, which is used in hybrid capacitor electrodes and hybrid/electric double layer capacitor manufacturing, etc. Compatibility effect

Inactive Publication Date: 2016-04-20
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There are a lot of researches on carbon nanotubes as electrode materials, however, there is almost no research on the preparation of electrodes by compounding chitin

Method used

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  • Method for preparing membrane electrode from chitin nano fiber/carbon nanotube composite
  • Method for preparing membrane electrode from chitin nano fiber/carbon nanotube composite
  • Method for preparing membrane electrode from chitin nano fiber/carbon nanotube composite

Examples

Experimental program
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Effect test

Embodiment 1

[0034] The preparation method of extracting chitin nanofibers from shrimp shells includes the steps (1) selecting edible shrimp shells, washing and drying them, using an electronic balance to accurately weigh 10g and putting them into a beaker, adding 600ml deionized water, and using 7wt% Hydrochloric acid (HCl) was left at room temperature for 24 hours to remove the calcium carbonate in the shrimp shell, and then rinsed with a large amount of deionized water until neutral;

[0035] Step (2) Soak the shrimp shells in a 5% potassium hydroxide (KOH) solution, place them in a water bath at 95°C for 6 hours, remove the protein in the shrimp shells, and then rinse them with a large amount of deionized water until medium. properties; this process was repeated four times to ensure adequate protein removal;

[0036] Step (3) Place the treated shrimp shells in 75% ethanol solution for 24 hours, seal and let stand to remove the pigment, and then rinse until neutral to obtain purified ch...

Embodiment 2

[0048] A preparation method for extracting chitin nanofibers from crab shells, including

[0049] Step (1) Select the crab shells that have been eaten, wash and dry them, weigh 10g with an electronic balance, put them into a beaker, add 600ml of deionized water, and let them stand for 24 hours with 6wt% hydrochloric acid (HCl) at room temperature to remove the crab shells. Calcium carbonate in the shell, then washed to neutrality with copious amounts of deionized water;

[0050] Step (2) Soak the crab shells in a 6% potassium hydroxide (KOH) solution, place them in a water bath at 100°C for 6 hours, remove the protein in the crab shells, and then rinse them with a large amount of deionized water until medium. properties; this process was repeated four times to ensure adequate protein removal;

[0051] Step (3) Place the treated crab shells in 95% ethanol solution for 48 hours, seal and let stand to remove the pigment, and then rinse until neutral to obtain purified chitin;

...

Embodiment 3

[0062] Preparation method for extracting chitin nanofibers from commercially purchased chitin powder, comprising

[0063] Step (1) Sieve 40-60 mesh chitin powder, after drying, use an electronic balance to accurately weigh 10g, put it into a beaker, add 600ml of deionized water, and let it stand for 24 hours with 5wt% hydrochloric acid (HCl) at room temperature. Remove the calcium carbonate in chitin, then rinse with a large amount of deionized water until neutral;

[0064] Step (2) Soak chitin in a 7% potassium hydroxide (KOH) solution, place it in a water bath at 90°C for 6 hours, remove the protein in the chitin, and then rinse it with a large amount of deionized water until the medium sex;

[0065] Step (3) Use 5wt% hydrochloric acid to stand at room temperature for 12 hours, and then rinse with a large amount of deionized water until neutral;

[0066] Step (4) Soak chitin in a 5% potassium hydroxide (KOH) solution for 24 hours at room temperature. This process is repeat...

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Abstract

The invention relates to a method for preparing a flexible bendable membrane electrode from a chitin nano fiber / carbon nanotube composite, which comprises the following steps: a) preparing the chitin nano fiber / carbon nanotube composite from carapace kitchen waste products by a simple chemical-mechanical process; and b) mixing the chitin nano fiber / carbon nanotube composite with a carbon nanotube dispersion solution. The membrane electrode maintains more pore structures, is beneficial to permeation and absorption of the electrolyte, and enhances the electron and ion transfer speed; the chitin nano fibers have higher mechanical strength, and have favorable biocompatibility with the carbon nanotubes, so that the mixture of the chitin nano fibers and carbon nanotubes eliminates the phenomenon of high agglomeration tendency when the chitin nano fibers and carbon nanotubes are used respectively; the chitin nano fibers used as the substrate provide firm attachment and support for the carbon nanotubes, and are a flexible sheet; and in the microscopic view, the two materials are wound and penetrate mutually to form the three-dimensional porous interpenetrating firm network. No adhesive is added, so the membrane electrode has favorable heat stability and flexibility, and can be used as an electrode material for portable electronic products.

Description

technical field [0001] The invention relates to a method for preparing flexible and bendable film electrodes by compounding chitin nanofibers / carbon nanotubes, which belongs to the field of composite electrodes. Background technique [0002] Chitin is the second largest renewable resource in the world next to cellulose in nature. It uses discarded shrimp and crab shells from kitchen waste products as raw materials. pollution, and give full play to the remaining functions of discarded shrimp and crab shells, recycle and regenerate, and turn waste into treasure. [0003] With the development of science and technology, the use of electronic components has entered thousands of households. Electrodes, as energy storage components that have attracted attention in recent years, have the advantages of high energy density and high power density, and have broad application prospects in the future, especially portable Portable electronic equipment, reserve power, etc. At present, all...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/08C08J5/18C08L5/08C08K7/24H01G11/36H01G11/86
CPCY02E60/13C08B37/003C08J5/18C08J2305/08C08K7/24H01G11/36H01G11/86C08L5/08
Inventor 李大纲杨静云
Owner NANJING FORESTRY UNIV
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