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Graphene-oxide-modified phenolic-resin-based ultrafine porous carbon fiber and preparation method thereof

A technology of phenolic resin and graphene, applied in fiber chemical characteristics, textiles and papermaking, etc., can solve the problems of low carbonization yield and low specific surface area of ​​PAN fibers, and achieve improved flexibility, low preparation cost and improved thermal stability Effect

Active Publication Date: 2013-07-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the carbonization yield of PAN fiber is low, and its specific surface area is very low without activation, and there is almost no pore structure.

Method used

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  • Graphene-oxide-modified phenolic-resin-based ultrafine porous carbon fiber and preparation method thereof
  • Graphene-oxide-modified phenolic-resin-based ultrafine porous carbon fiber and preparation method thereof
  • Graphene-oxide-modified phenolic-resin-based ultrafine porous carbon fiber and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0019] This embodiment includes the following steps:

[0020] Step 1, adding graphene oxide into acetone, and ultrasonically dispersing to form a graphene oxide acetone solution with a concentration of 7.0 mg / ml;

[0021] Step 2, by thermosetting phenolic resin, polyvinyl butyral and graphene oxide mass ratio is the ratio of 1:0.020:0.03, thermosetting phenolic resin and polyvinyl butyral are added in graphene oxide acetone solution, will The mixed solution is stirred until completely dissolved, and the molecular weight of the thermosetting phenolic resin is 2000;

[0022] Step 3, electrospinning the mixed solution in step 2 into composite ultrafine fibers, the spinning voltage is 23kV, the liquid feeding speed is 1ml / h, and the working distance is 24cm;

[0023] Step 4: After the above-mentioned fiber is heated from room temperature to 180°C in a non-uniform stepwise manner, it is cured for another 2 hours. The rate should be lower than 4°C / h. As the temperature rises, the ...

Embodiment 2

[0026] This embodiment includes the following steps:

[0027] Step 1, adding graphene oxide into ethanol, and ultrasonically dispersing to form a graphene oxide ethanol solution with a concentration of 12.1mg / ml;

[0028] Step 2, according to the mass ratio of thermosetting phenolic resin, polyvinylpyrrolidone and graphene oxide is 1:0.024:0.05, adding thermosetting phenolic resin and polyvinylpyrrolidone to the graphene oxide ethanol solution, stirring the mixed solution Until completely dissolved, the molecular weight of the thermosetting phenolic resin is 2300;

[0029] Step 3, electrospinning the mixed solution in step 2 into composite ultrafine fibers, the spinning voltage is 25kV, the liquid feeding speed is 1ml / h, and the working distance is 22cm;

[0030] Step 4: After the above-mentioned fiber is heated from room temperature to 180°C in a non-uniform stepwise manner, it is then cured for 1.5 hours. The rate should be lower than 4°C / h. As the temperature increases, t...

Embodiment 3

[0033] This embodiment includes the following steps:

[0034] Step 1, adding graphene oxide into acetone, and ultrasonically dispersing to form a graphene oxide acetone solution with a concentration of 8.3 mg / ml;

[0035] Step 2, by thermosetting phenolic resin, polyvinyl butyral and graphene oxide mass ratio is the ratio of 1:0.018:0.02, thermosetting phenolic resin and polyvinyl butyral are added in graphene oxide acetone solution, will The mixed solution is stirred until completely dissolved, and the molecular weight of the thermosetting phenolic resin is 2000;

[0036] Step 3, electrospinning the mixed solution in step 2 into composite ultrafine fibers, the spinning voltage is 25kV, the liquid feeding speed is 1ml / h, and the working distance is 24cm;

[0037] Step 4: After the above-mentioned fiber is heated from room temperature to 180°C in a non-uniform stepwise manner, it is cured for another 2 hours. The rate should be lower than 4°C / h. As the temperature rises, the ...

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Abstract

The invention relates to graphene-oxide-modified phenolic-resin-based ultrafine porous carbon fiber and a preparation method thereof. The diameter of the fiber is in a range of 0.3-1.7mum, and the specific surface area of the fiber is 500-900m<2> / g. The fiber has a porous structure which is formed by microporous mainly. Micro-pore volume is 0.20-0.50cm<3> / g, and surface oxygen atomic ratio is lower than 10%. The preparation method comprises the steps that: graphene oxide is added into an organic solvent and is subjected to ultrasonic dispersion, such that a graphene oxide solution is formed; termosetting phenolic resin and a high-molecular-weight linear polymer are added into the graphene oxide organic solution, and are completely dissolved by stirring; the mixed solution is spun into composite fiber, and solidification and carbonization are carried out, such that porous phenolic-resin-based carbon / graphite oxide composite ultrafine fiber is obtained. The sources of adopted raw materials are rich. The prepared composite fiber has the advantages of high structural stability, good flexibility, developed pore structure, controllable surface oxygen content, and suitability for practical application.

Description

technical field [0001] The invention belongs to the technical field of porous carbon fibers, and relates to a graphene oxide-modified phenolic resin-based ultrafine porous carbon fiber and a preparation method. Background technique [0002] Ultrafine porous carbon fibers prepared by electrospinning and subsequent heat treatment have attracted extensive attention in applications such as adsorption catalysis, biomedicine, and energy storage due to their high specific surface area, well-developed pore structure, and self-supporting structure. So far, the precursor used to prepare ultrafine porous carbon fibers is mainly polyacrylonitrile (PAN). However, the carbonization yield of PAN fiber is low, and its specific surface area is very low without activation, and there is almost no pore structure. However, phenolic resin-based carbon fine fiber carbon has a high yield and a well-developed pore structure after carbonization, which has attracted more and more attention. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/24
Inventor 黄正宏白宇康飞宇
Owner TSINGHUA UNIV
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