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Preparing method of microporous carbon fiber with high specific surface area

A high specific surface area, microporous carbon technology, applied in the field of porous materials, can solve the problems of long activation step time, complex preparation process, high energy consumption, etc., and achieve the effect of abundant micropores and simple process

Inactive Publication Date: 2017-03-22
WUYI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The activation process complicates the preparation process and increases energy consumption
[0004] In CN102505403A "A Preparation Method of Activated Carbon Fiber Membrane with Hierarchical Pore Structure", a polyacrylonitrile membrane is prepared by dispersing the high and medium pore activated carbon material into a polyacrylonitrile organic solvent by electrospinning, and then pre-oxidized, Activated carbon fibers with hierarchical pore structure were prepared by carbonization and carbon dioxide activation. This invention uses electrospinning technology in the preparation process of activated carbon fiber precursor fibers, but the activation process is still required to obtain micropores and high specific surface areas. The activation step time Too long, high energy consumption
At present, there is no public report on the preparation of microporous carbon materials with high specific surface area by electrospinning by blending phenolic resin and pore-forming agent, followed by carbonization

Method used

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  • Preparing method of microporous carbon fiber with high specific surface area
  • Preparing method of microporous carbon fiber with high specific surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: join the thermosetting phenolic resin of 1 weight part, the polyvinyl butyral (PVB) of 0.6 weight part, the pore-forming agent of 0.05 weight part in the ethanol solvent of 10 weight parts, fully stir and disperse to obtain electrospinning silk stock solution;

[0020] The electrospinning stock solution was spun on an electrospinning equipment to obtain fibers (precursor fibers). The electrospinning parameters were: spinning needle G30, spinning voltage 18kV, and spinning distance 20cm; the fibers were cured at 70°C for 8 1 hour, 80°C for 4 hours, 90°C to 110°C for 2 hours per liter of 10°C, 120°C to 150°C for each liter of 10°C for 1 hour, and 160°C for another 2 hours. ; Afterwards, put the cured fiber glue in a tubular carbonization furnace, under the protection of nitrogen, the temperature is raised from room temperature to 700°C at a heating rate of 5°C / min, carbonized at a constant temperature for 180 minutes, and cooled naturally to obtain micropore...

Embodiment 2

[0021] Embodiment 2: join the thermosetting phenolic resin of 1 weight part, the polyvinyl butyral (PVB) of 0.5 weight part, the pore-forming agent of 0.1 weight part in the ethanol solvent of 8 weight parts, fully stir and disperse to obtain electrospun silk stock solution;

[0022] The electrospinning stock solution was spun on an electrospinning equipment to obtain fibers (precursor fibers). The electrospinning parameters were: spinning needle G30, spinning voltage 18kV, and spinning distance 20cm; the fibers were cured at 70°C for 8 1 hour, 80°C for 4 hours, 90°C to 110°C for 2 hours per liter of 10°C, 120°C to 150°C for each liter of 10°C for 1 hour, and 160°C for another 2 hours. ; Afterwards, put the cured fiber glue in a tubular carbonization furnace, under the protection of nitrogen, the temperature is raised from room temperature to 900°C at a heating rate of 5°C / min, carbonized at a constant temperature for 60 minutes, and cooled naturally to obtain micropores with ...

Embodiment 3

[0023] Embodiment 3: join the thermosetting phenolic resin of 1 weight part, the polyvinyl butyral (PVB) of 0.8 weight part, the pore-forming agent of 0.2 weight part in the ethanol solvent of 15 weight parts, fully stir and disperse to obtain electrospinning silk stock solution;

[0024] The electrospinning stock solution was spun on an electrospinning equipment to obtain fibers (precursor fibers). The electrospinning parameters were: spinning needle G30, spinning voltage 18kV, and spinning distance 20cm; the fibers were cured at 70°C for 8 1 hour, 80°C for 4 hours, 90°C to 110°C for 2 hours per liter of 10°C, 120°C to 150°C for each liter of 10°C for 1 hour, and 160°C for another 2 hours. ; Afterwards, put the cured fiber glue in a tubular carbonization furnace, under the protection of nitrogen, the temperature is raised from room temperature to 800°C at a heating rate of 5°C / min, carbonized at a constant temperature for 120 minutes, and cooled naturally to obtain micropores...

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Abstract

The invention relates to a preparing method of a microporous carbon fiber with high specific surface area. The preparing method comprises the steps of adding thermosetting phenolic resin, polyvinyl butyral (PVB) and a pore-forming agent into ethyl alcohol to be subjected to blending to prepare an organic fiber precursor for electrostatic spinning, then after the technologies of electrostatic spinning, curing, carbonization and the like, and the microporous carbon fiber with high specific surface area is obtained. The preparing method of the microporous carbon fiber with high specific surface area is simple in technology, rich in micropore and environmentally friendly, and saves energy.

Description

technical field [0001] The invention relates to the technical field of porous materials, in particular to a method for preparing microporous carbon fibers with high specific surface area. Background technique [0002] Due to its special pore structure and high specific surface area, microporous carbon materials play an important role in daily life. Now, microporous carbon materials have been widely used in gas storage and separation, electrode materials for batteries or capacitors, catalysts or catalyst supports for various chemical reactions, sewage treatment, precious metal recovery, etc. [0003] The more common microporous carbon material is activated carbon. Due to the disadvantages of non-uniform pore size distribution and small specific surface area of ​​activated carbon, the application of activated carbon is greatly restricted. In order to overcome the disadvantages of activated carbon, activated carbon fibers have been developed. At present, the production proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/20D01F8/16D01F8/10D01F1/10D01D5/00
Inventor 曾显华聂伟利徐凡贾永堂余永达
Owner WUYI UNIV
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