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A method for preparing carbon fiber cloth with high specific surface area based on electrospinning process

An electrospinning process and high specific surface area technology, which is applied in the direction of spinning solution preparation, carbon fiber, fiber treatment, etc., can solve the problems of not having a high surface area ratio, many pores, and difficulty in meeting the use requirements, etc., to increase the specific surface area and physical strength, ease of manipulation, and structural consistency

Inactive Publication Date: 2017-02-22
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have found that this carbon cloth prepared by traditional methods does not have excellent characteristics such as high surface area ratio and pores, so it is difficult to meet the requirements for use as a substrate for supercapacitors, lithium-ion batteries and fuel cells

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • A method for preparing carbon fiber cloth with high specific surface area based on electrospinning process
  • A method for preparing carbon fiber cloth with high specific surface area based on electrospinning process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] According to the proportion of adding 10g of polyacrylonitrile with a molecular weight of 80,000 per 100ml of dimethylformamide, dissolve polyacrylonitrile into dimethylformamide and mix well, then add it to the syringe of the electrospinning equipment , and under the action of an electric field, the electrospinning operation is carried out through the spinneret array to the collecting plate, wherein the propulsion speed of the injector to the precursor solution is set to 0.004mm / sec, and the distance between the spinneret and the collecting plate is set to Set to 13cm, the electric field voltage is set to 25kV, and the speed of the collecting plate moving along the horizontal direction is set to 30cm / min, thus generating nanometer-sized polymer filaments;

[0035]The generated polymer filaments are entangled to form micron-scale polymer thin wires; then the polymer thin wires are used as weft and warp threads to interweave to form a cloth-like structure; then, in nitrog...

Embodiment 2

[0038] According to the proportioning ratio of adding 14.5g of polyacrylonitrile with a molecular weight of 82000 per 100ml of dimethylformamide, polyacrylonitrile is dissolved in dimethylformamide and mixed evenly, and then added to the electrospinning equipment In the injector, and under the action of an electric field, the electrospinning operation is carried out to the collecting plate through the spinneret array, wherein the propulsion speed of the injector to the precursor solution is set to 0.003mm / second, and the distance between the spinneret and the collecting plate is It is set to 16cm, the electric field voltage is set to 15kV, and the speed of the collecting plate moving along the horizontal direction is set to 20cm / min, thereby generating nanometer-sized polymer filaments;

[0039] The generated polymer filaments are entangled to form micron-scale polymer thin wires; then the polymer thin wires are used as weft and warp threads to interweave to form a cloth-like s...

Embodiment 3

[0042] According to the ratio of adding 20g of polyacrylonitrile with a molecular weight of 80,000 per 100ml of dimethylformamide, dissolve polyacrylonitrile into dimethylformamide and mix well, then add it to the syringe of the electrospinning equipment , and under the action of an electric field, the electrospinning operation is carried out through the spinneret array to the collecting plate, wherein the propulsion speed of the injector to the precursor solution is set to 0.006mm / sec, and the distance between the spinneret and the collecting plate is set to Set to 14cm, the electric field voltage is set to 20kV, and the speed of the collecting plate moving along the horizontal direction is set to 50cm / min, thus generating nanometer-sized polymer filaments;

[0043] The generated polymer filaments are entangled to form micron-scale polymer thin wires; then the polymer thin wires are used as weft and warp threads to interweave to form a cloth-like structure; then, in nitrogen g...

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Abstract

The invention discloses a method for preparing carbon fiber cloth with a high specific surface area based on an electrospinning process, comprising: (a) dissolving polyacrylonitrile into dimethylformamide and mixing them uniformly, and then generating nanometer carbon fiber cloth based on an electrospinning process High molecular polymer filaments of the order of magnitude; (b) winding the generated high molecular polymer filaments to form micron-scale high molecular polymer thin threads; then adopting the high molecular polymer thin threads as weft threads and warp, interweaving to form a cloth-like structure; (c) under a protective atmosphere, perform pyrolysis of the cloth-like structure at a temperature of 800°C to 900°C, and carbonize the polymer to form a carbon fiber cloth; (d) make the carbon fiber The surface of the cloth is activated, thereby producing the desired carbon fiber cloth product. Through the present invention, the carbon fiber cloth with the characteristics of high specific surface area, small pore size of the fiber membrane and good continuous type can be prepared, so it is especially suitable for the application of supercapacitors, lithium ion batteries and fuel cells.

Description

technical field [0001] The invention belongs to the field related to the preparation of carbon fiber cloth, and more specifically relates to a method for preparing carbon fiber cloth with high specific surface area based on an electrospinning process. The obtained carbon fiber cloth has excellent characteristics such as high specific surface area of ​​nanometer scale and many pores , so it is especially suitable for applications in supercapacitors, lithium-ion batteries and fuel cells. Background technique [0002] With the continuous development of battery and capacitor manufacturing process and technology, carbon fiber cloth (carbon cloth) is used more and more as a good conductive material. The so-called carbon cloth, also known as carbon fiber cloth, carbon fiber prepreg cloth, etc., is often used for tensile, shear and seismic reinforcement of structural members, and can constitute a complete carbon fiber cloth sheet reinforcement system with excellent performance. has...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/50D06M11/38D01D1/02D01D5/00D02G3/02D03D15/00D06C7/04D06M101/40D03D15/275D03D15/283
Inventor 汤自荣胡浩周腾远
Owner HUAZHONG UNIV OF SCI & TECH