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Method for preparing porous carbon fibers with electrospinning process

A porous carbon, electrospinning technology, used in electrospinning, fiber processing, filament/thread forming, etc.

Inactive Publication Date: 2017-05-31
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among the above patents, most of the patents use pore-forming agent, high molecular polymer and organic solvent to form a spinning solution to prepare porous carbon fibers, and there is no patent for preparing porous carbon fibers with a spinning solution doped with cyclodextrin

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 1. Dissolve polyacrylonitrile in N,N-dimethylformamide solvent, stir with a magnetic stirrer at room temperature for 4 hours to prepare a series of 10% polyacrylonitrile solutions by adding zinc acetate and zinc acetate The mass is 67% of the mass of polyacrylonitrile, and then cyclodextrin is added. The mass of cyclodextrin is 40% of the mass of polyacrylonitrile. After heating and magnetic stirring at a constant temperature of 60°C for 4 hours, stir at room temperature for 16 hours to form a uniform Electrospinning mixed solution;

[0011] 2. Electrospinning the prepared spinning solution to obtain composite fiber precursor. 6h after spinning, put the prepared fiber in a ventilated place to dry for 24h;

[0012] 3. The composite fiber precursor dried in step (2) is pre-oxidized in air at 250°C, and then carbonized at a high temperature at 900°C under nitrogen protection for 2 hours to obtain carbon fibers. The carbon fibers are soaked in hydrochloric acid for 1 hour. The...

Embodiment 2

[0013] Example 2: Change the mass fraction of polyacrylonitrile and N,N-dimethylformamide to 20%, and the other steps are the same as in Example 1, to obtain porous carbon fibers.

Embodiment 3

[0014] Example 3: Change the mass of zinc acetate so that the mass percentage of polyacrylonitrile is 50%, and the other steps are the same as in Example 1, to obtain porous carbon fibers.

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Abstract

The invention relates to a method for preparing porous carbon fibers with an electrospinning process. The method comprises steps as follows: polyacrylonitrile is dissolved in N, N-dimethyl formamide, cyclodextrin is added to serve as a molecular recognition structure, a spinning solution is prepared with zinc acetate as a pore-forming agent, compound fiber precursors are prepared through electrostatic spinning and then subjected to peroxidation, carbonization and other heat treatment, porous carbon fibers are obtained, a cavity structure of cyclodextrin is reserved through carbonization, and the porous carbon fibers can be used for preparing an electrode of a super capacitor or have broader application prospect in molecular recognition field. The preparation is simple, the yield is high, the cost is low, and the porous carbon fibers with micropores, mesopores and macropores can be prepared with the method.

Description

Technical field [0001] The invention relates to an electrospinning method for preparing porous carbon fibers and its application in supercapacitors, in particular to a method in which a spinning solution is prepared by a blending method and subjected to high temperature treatment to obtain carbon fibers and then a template is removed to prepare porous carbon fibers. Background technique [0002] Nanoscience is the darling of the 21st century. Nanodevices with related special structures and properties have become the best in the global research heat wave. Researchers are committed to studying nanomaterials with special properties. Among many nanomaterials, porous carbon fibers have High temperature resistance, corrosion resistance, low thermal expansion coefficient, high conductivity, high specific surface area, high specific strength, etc. Porous carbon fiber stands out because of its larger specific surface area and better mechanical properties. From the research trend in recent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22H01G11/36H01G11/24D01D5/00
CPCY02E60/13D01F9/225D01D5/003H01G11/24H01G11/36
Inventor 曲玉宁刘家良王静魏伟王志宏
Owner TIANJIN POLYTECHNIC UNIV