Multi-hole carbon fiber and preparation method thereof

A technology of porous carbon fiber and pore-forming agent, which is applied in fiber processing, fiber chemical characteristics, chemical instruments and methods, etc., can solve the problems of difficult industrialized production, high cost, brittle carbon fiber, etc., and achieves convenient recycling, simple preparation, and low cost. low effect

Active Publication Date: 2013-04-03
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The following problems still exist in the preparation methods of porous carbon fibers reported in the literature: the pore structure is not easy to control; carbon fiber membrane
The above problems greatly limit the application of porous carbon fibers in supercapacitors and lithium-ion batteries.

Method used

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  • Multi-hole carbon fiber and preparation method thereof
  • Multi-hole carbon fiber and preparation method thereof
  • Multi-hole carbon fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Dissolve 0.1g of pore-forming agent terephthalic acid in 10g of N,N-dimethylformamide. After fully dissolving, add 0.8g of polyacrylonitrile with a number-average molecular weight of 150w, and stir at 80°C for 2 hours to form a uniform and transparent solution.

[0044] The electrospinning process was carried out on a single-nozzle electrospinning device, which consisted of a DC high-voltage power supply, a single capillary spinneret, a collecting plate and a ground wire. The collecting plate was made of aluminum foil, and the electrospinning temperature was 15°C. The specific preparation process is as follows: transfer the prepared precursor solution to a 10mL medical syringe, inject it into the spinneret at a flow rate of 1.0mL / h, apply a high-voltage electric field between the spinneret and the collecting plate to make the spinning liquid After stretching, thinning and solidification, the formed fibers fall on the aluminum foil collecting plate. The working voltage ...

Embodiment 2

[0048] Dissolve 0.3g of terephthalic acid in 10g of N,N-dimethylformamide. After fully dissolving, add 0.8g of polyacrylonitrile with a number average molecular weight of 150w, and stir at 80°C for 2h to form a uniform transparent solution.

[0049] The electrospinning process was carried out on a single-nozzle electrospinning device, as described in Example 1, wherein the collecting plate was aluminum foil, and the electrospinning temperature was 25°C. The specific preparation process is as follows: transfer the prepared precursor solution to a 10mL medical syringe, inject it into the spinneret at a flow rate of 1.0mL / h, apply a high-voltage electric field between the spinneret and the collecting plate to make the spinning liquid After stretching, thinning and solidification, the formed fibers fall on the aluminum foil collecting plate. The working voltage is 30kV, and the distance between the needle tip and the aluminum foil is 15cm. The collected terephthalic acid-polyacry...

Embodiment 3

[0053] Dissolve 0.5g of terephthalic acid in 10g of N,N-dimethylformamide. After fully dissolving, add 0.8g of polyacrylonitrile with a number average molecular weight of 150w, and stir at 80°C for 2h to form a uniform transparent solution.

[0054] The electrospinning process was carried out on a single-nozzle electrospinning device, as described in Example 1, wherein the collecting plate was aluminum foil, and the electrospinning temperature was 30°C. The specific preparation process is as follows: transfer the prepared precursor solution to a 10mL medical syringe, inject it into the spinneret at a flow rate of 1.0mL / h, apply a high-voltage electric field between the spinneret and the collecting plate to make the spinning liquid After stretching, thinning and solidification, the formed fibers fall on the aluminum foil collecting plate. The working voltage is 30kV, and the distance between the needle tip and the aluminum foil is 15cm. The collected terephthalic acid-polyacry...

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Abstract

The invention discloses a multi-hole carbon fiber and a preparation method thereof. The method comprises the following steps: spinning solution composed of pore former, high polymer and organic solvent is used for spinning and then carbonization to obtain the multi-hole carbon fiber. The method has the following advantages: 1, the preparation is simple, the yield is high, and the cost is low; 2, the sizes of holes of the multi-hole carbon fiber can be controlled conveniently by changing the preparation parameters; 3, the used pore former can performing pore-forming in a self sublimation manner and can be reclaimed for use, so that the preparation cost can be lowered greatly; and 4, the obtained carbon fiber has a multi-hole structure, so that the bendability is improved, and the carbon fiber can be bent and folded at will instead of being broken, and can support a finished film independently.

Description

technical field [0001] The invention relates to a porous carbon fiber and a preparation method thereof. Background technique [0002] Due to its unique structure and characteristics, carbon fibers are widely used as supercapacitors, batteries, catalyst supports, and field emission display materials. Due to the solid structure of traditional carbon fiber, its effective specific surface area is low, which hinders the application of carbon fiber. In recent years, the preparation of porous carbon fibers has aroused widespread research interest and has become a research and development hotspot. Porous carbon fiber has a high specific surface area due to its macropores (>50nm), mesopores (2-50nm) and micropores (<2nm). [0003] The following problems still exist in the preparation methods of porous carbon fibers reported in the literature: the pore structure is not easy to control; carbon fiber membrane. The above problems greatly limit the application of porous carbon f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/22D01F9/24D01F9/145D01F9/21D01F1/10D01D5/00H01M2/16B01D71/02
CPCY02E60/12Y02E60/10
Inventor 宋卫国刘华曹昌燕
Owner INST OF CHEM CHINESE ACAD OF SCI
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