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Cellulose/carbon nano tube composite nanofiber membrane preparation method

A carbon nanotube composite and composite nanofiber technology is applied in fiber processing, spinning solution preparation, filament/wire forming and other directions, and can solve the problems that do not involve the preparation and performance of cellulose/carbon nanotube electroactive materials, etc. To achieve the effect of simple process, high conductivity and good electroactive performance

Inactive Publication Date: 2013-07-31
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are no reports and patents related to the preparation and performance of cellulose / carbon nanotube electroactive materials with high electroactive properties.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1) Preparation of carbon nanotube solution: add 4.0g of single-walled carbon nanotubes to 200ml of HNO 3 / H 2 SO 4 (1:1) mixed acid, prepare a 0.02g / mL solution, heat the solution to a boiling state and reflux for 60min, filter and wash with deionized water to weak acidity, vacuum dry at 60°C for 24h, take a certain Disperse the dried carbon nanotubes in deionized water, and ultrasonically disperse to obtain a carbon nanotube solution with a concentration of 6.0 mg / mL;

[0014] 2) Preparation of cellulose solution: Dissolve bacterial cellulose with a molecular weight of 500,000 in trifluoroacetic acid at room temperature, prepare a solution with a volume mass fraction (g / L) of 3.5%, stir magnetically for 6 hours, and obtain a transparent and shallow Yellow cellulose trifluoroacetic acid solution;

[0015] 3) Preparation of composite solution: mixing the carbon nanotube solution obtained in step 1) with the cellulose trifluoroacetic acid solution obtained in step 2) a...

Embodiment 2

[0018] 1) Acidification of nanotubes: Add 4.0g of single-walled carbon nanotubes to 100ml of HNO 3 / H 2 SO 4 (1:1) mixed acid, prepare a 0.04g / mL solution, heat the solution to boiling state and reflux for 70min, filter and wash with deionized water to weak acidity, vacuum dry at 60°C for 24h, take a certain Disperse the dried carbon nanotubes in deionized water, and ultrasonically disperse to obtain a carbon nanotube solution with a concentration of 8.0 mg / mL;

[0019] 2) Preparation of cellulose solution: Dissolve bacterial cellulose with a molecular weight of 400,000 in trifluoroacetic acid at room temperature, prepare a solution with a volume mass fraction (g / L) of 5%, stir it magnetically for 6 hours, and obtain a transparent and shallow Yellow cellulose trifluoroacetic acid solution;

[0020] 3) Preparation of composite solution: the carbon nanotube solution obtained in step 1), the carbon nanotube solution obtained in step 2) and the cellulose trifluoroacetic acid so...

Embodiment 3

[0023] 1) Acidification of nanotubes: Add 8.0g of single-walled carbon nanotubes to 100ml of HNO 3 / H 2 SO 4 (1:1) mixed acid, prepare a 0.08g / mL solution, heat the solution to boiling state and reflux for 90min, filter and wash with deionized water to weak acidity, vacuum dry at 60°C for 24h, take a certain Disperse the dried carbon nanotubes in deionized water, and ultrasonically disperse to obtain a carbon nanotube solution with a concentration of 10 mg / mL;

[0024] 2) Preparation of cellulose solution: Dissolve bacterial cellulose with a molecular weight of 300,000 in trifluoroacetic acid at room temperature, prepare a solution with a volume mass fraction (g / L) of 7%, and stir magnetically for 6 hours to obtain a transparent and shallow Yellow cellulose trifluoroacetic acid solution;

[0025] 3) Preparation of composite solution: mixing the carbon nanotube solution obtained in step 1) with the cellulose trifluoroacetic acid solution obtained in step 2) according to the ...

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Abstract

The invention discloses a cellulose / carbon nano tube composite nanofiber membrane preparation method, and belongs to an electroactive material preparation technology. The method comprises the following processes of: firstly, acidizing carbon nano tubes so as to enable CNT-COOH to be generated on the surfaces of the carbon nano tubes, and dispersing the carbon nano tubes into deionized water to prepare a carbon nano tube solution; dissolving bacterial cellulose into trifluoroacetic acid so as to obtain a transparent light-yellow bacterial cellulose trifluoroacetic acid solution; and mixing the carbon nano tube solution with the bacterial cellulose trifluoroacetic acid solution and electrospinning, wherein the high-voltage electrostatic regulation scope is 10-30kV, the flow rate of an injection pump is 0.05-0.3mL / h, and the receiving distance is 10-20cm. The preparation method is simple in process, and an obtained cellulose / carbon nano tube composite nanofiber membrane has the advantages of high electric conductivity and good electroactivity.

Description

technical field [0001] The invention relates to a method for preparing cellulose / carbon nanotubes (including single-wall and multi-wall (n=2-20)) through high-voltage electrostatic spinning to form a film, which belongs to the preparation technology of electroactive materials. Background technique [0002] Cellulose is the most widely distributed and annual output of natural bio-derived polymer materials on the earth, and it is a truly sustainable and non-consumable natural raw material. Cellulose has many unique properties, such as hydrophilicity, optical activity, biocompatibility, etc. The most common and important sources of cellulose are mainly cotton and wood. In addition, hemp, wheat straw, straw, bagasse, etc. are all rich sources of cellulose. The cellulose obtained from plants is called plant cellulose. In 1886, Brown discovered for the first time that bacteria can also synthesize cellulose. The cellulose produced by certain bacteria of the genus Acetobacter, Rhiz...

Claims

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Application Information

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IPC IPC(8): D04H1/4382D04H1/728D01D5/00D01D1/02
Inventor 蔡志江樊亚男赵世英郭杰
Owner TIANJIN POLYTECHNIC UNIV
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