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Polyacrylonitrile porous carbon fiber preparation method

A technology of polyacrylonitrile and polystyrene fibers, which is applied in the field of carbon fiber materials, can solve the problems of low electrospinning and spinning efficiency, and achieve the effects of excellent morphology and structure, fast spinning speed and good softness

Inactive Publication Date: 2017-02-22
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the spinning efficiency of electrospinning is low, which directly limits the road to its industrialization

Method used

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  • Polyacrylonitrile porous carbon fiber preparation method
  • Polyacrylonitrile porous carbon fiber preparation method
  • Polyacrylonitrile porous carbon fiber preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of PAN / PS solution: Take 1.17g of PS microparticles, add 20g of DMF, stir at 70°C to dissolve completely. Then add 3.5g PAN, stir at room temperature for 12h, at this time, the content of PAN is 15%, and the content of PS is 5%;

[0020] (2) Preparation of PAN / PS nascent fiber by electrostatic melt blowing: add the prepared solution to the syringe pump, the liquid supply rate is 20ml / h, the diameter of the spinning needle tip is 0.8mm, and the positive electrode of the high-voltage power supply is connected to the spinneret needle tip place, the negative electrode is grounded, the voltage of the high-voltage power supply is 35kv, the drafting wind pressure of the spinneret is adjusted to 0.01MPa, and the distance between the receiving device and the spinneret is 50cm;

[0021] (3) Pre-oxidation treatment of PAN / PS as-spun fibers: in the air, the prepared as-spun fibers were heated to 200°C at a heating rate of 2°C / min, kept for 1h, and then naturally coo...

Embodiment 2

[0024] (1) Preparation of PAN / PS solution: Take 1.75g ​​of PS microparticles, add 20g of DMF, stir at 70°C to dissolve completely. Then add 3.5g of PAN, stir at room temperature for 12h, at this time, the content of PAN is 13.8%, and the content of PS is 7%;

[0025] (2) Preparation of PAN / PS nascent fiber by electrostatic melt blowing: add the prepared solution to the syringe pump, the liquid supply rate is 23ml / h, the diameter of the spinning needle tip is 0.8mm, and the positive electrode of the high-voltage power supply is connected to the spinneret needle tip At the place, the negative pole is grounded, the voltage of the high-voltage power supply is 40kv, the drafting wind pressure of the spinneret is adjusted to 0.04MPa, and the distance between the receiving device and the spinneret is 60cm;

[0026] (3) Pre-oxidation treatment of PAN / PS as-spun fibers: in the air, the prepared as-spun fibers were heated up to 260°C at a heating rate of 2°C / min, kept for 1h, and then n...

Embodiment 3

[0029] (1) Preparation of PAN / PS solution: take 2.33g PS microparticles, add 20g DMF, stir at 70°C to dissolve completely. Then add 3.5g PAN, stir at room temperature for 12h, at this time, the content of PAN is 13.6%, and the content of PS is 9%;

[0030] (2) Preparation of PAN / PS nascent fiber by electrostatic melt blowing: add the prepared solution to the syringe pump, the liquid supply rate is 27ml / h, the diameter of the spinning needle tip is 0.8mm, and the positive pole of the high-voltage power supply is connected to the spinneret needle tip At the place, the negative electrode is grounded, the voltage of the high-voltage power supply is 40kv, the drafting wind pressure of the spinneret is adjusted to 0.07MPa, and the distance between the receiving device and the spinneret is 70cm;

[0031] (3) Pre-oxidation treatment of PAN / PS as-spun fibers: in the air, the prepared as-spun fibers were heated up to 260°C at a heating rate of 2°C / min, kept for 1h, and then naturally co...

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Abstract

The invention discloses a polyacrylonitrile porous carbon fiber preparation method. The method comprises the steps of 1, preparing PAN / PS solution, 2, conducting electrostatic blowing to spin the PAN / PS as-spun fiber, 3, conducting the pre-oxidation processing of the as-spun fiber, 4, carbonizing the pre-oxidated fiber. The method is characterized in that the PAN / PS as-spun fiber is spun under the collective functions of both the electrostatic drawing and the air flow drawing, thus not only accelerating the spinning speed, but also let the fiber acquire a higher degree of orientation in the fiber forming process. The acquired as-spun fiber has good conical structure, and is a highly efficient preparation method of Polyacrylonitrile porous carbon fiber. The Polyacrylonitrile porous carbon fiber prepared by using the method has the advantages of being fluffy, having porous beehive structure, having high specific surface area and the like, and can be broadly applied in the application such as electrochemistry, adsorption, catalyst and hydrogen storage.

Description

technical field [0001] The invention belongs to the technical field of carbon fiber materials, and in particular relates to a preparation method of high-efficiency polyacrylonitrile-based porous carbon fibers. Background technique [0002] Carbon fiber is a high-performance fiber with high strength, high modulus, low density, high temperature resistance, chemical corrosion resistance, low electrical resistance, high thermal conductivity, radiation resistance, etc., so it has a wide range of applications, specifically in Aerospace, transportation, sports equipment and other fields. With the continuous advancement of technology, the diameter of fibers is getting smaller and smaller, and the appearance of carbon nanofibers increases the specific surface area of ​​carbon fibers many times, which makes carbon fibers have new applications in hydrogen storage, catalysis, adsorption and other fields. In order to further increase the specific surface area of ​​carbon fibers, porous ...

Claims

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Application Information

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IPC IPC(8): D01F9/22D01F9/21
CPCD01F9/22D01F9/21
Inventor 康卫民范兰兰程博闻庄旭品李晓捷邓南平鞠敬鸽马晓敏赵义侠李磊何宏升
Owner TIANJIN POLYTECHNIC UNIV
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