Method for preparing sponge-shaped porous carbon fiber membrane

A porous carbon fiber and sponge-like technology, applied in the field of new materials and chemical industry, can solve problems such as poor pore structure uniformity and fiber continuity, hinder material performance, etc., achieve uniform distribution, increase filling density, and high production efficiency.

Inactive Publication Date: 2019-08-27
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, carbon fibers with interconnected macropores usually exhibit poor pore structure uniformity and fiber continuity, which largely hinders the improvement of the material's mechanical, thermal, and electrical properties.

Method used

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  • Method for preparing sponge-shaped porous carbon fiber membrane
  • Method for preparing sponge-shaped porous carbon fiber membrane
  • Method for preparing sponge-shaped porous carbon fiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of a spongy porous carbon fiber membrane, the specific steps are:

[0038] (1) Prepare the precursor spinning solution: Dissolve 15g of polyvinyl alcohol (Aladdin, PVA1788, molecular weight 84000) in 85g of water at 90°C and stir for 300min to prepare an aqueous solution of polyvinyl alcohol with a mass fraction of 15%, then at 30°C Dissolve 2.4 μg of boric acid in 57.6 μg of water and stir for 180 min, then add the above-mentioned 20 g of polyvinyl alcohol aqueous solution with a mass fraction of 15% and 20 g of polytetrafluoroethylene emulsion (purchased from Dongguan Xingwang Plastic Raw Materials Co., Ltd., solid content : 60%, particle size: 0.2 μm) stirred for 300min and mixed evenly to obtain the precursor solution;

[0039] (2) The obtained precursor spinning solution is subjected to electrospinning, and the charged solution forms a stable jet under the drive of the electric field force, stretches and solidifies in the air, and finally depos...

Embodiment 2

[0043] A preparation method of a spongy porous carbon fiber membrane, the specific steps are:

[0044] (1) Prepare the precursor spinning solution: dissolve 2 g of polyvinyl alcohol (Aladdin, PVA1788, molecular weight 84,000) in 18 g of water at 90° C. and stir for 300 min. After cooling to room temperature, add 60 μl of 4% boric acid solution and 20g polytetrafluoroethylene emulsion (purchased from Dongguan Xingwang Plastic Raw Materials Co., Ltd., solid content: 60%, particle size: 0.2 μm) was stirred for 300 minutes and mixed evenly to prepare a precursor solution;

[0045] (2) The obtained precursor spinning solution is subjected to electrospinning, and the charged solution forms a stable jet under the drive of the electric field force, stretches and solidifies in the air, and finally deposits on the collection device to obtain the precursor fiber film. Spinning is carried out in an air environment with a relative humidity of 50%, a constant temperature thermal field of 30...

Embodiment 3

[0049] A method for preparing a 3D spongy whole body porous carbon fiber membrane, the specific steps are:

[0050] (1) Configure the precursor spinning solution: Dissolve 2g of polyvinylpyrrolidone (Aladdin, K88-96, molecular weight 1,300,000) in 18g of solvent water at 30°C and stir for 120min, then add 60μl of 4% boric acid solution and 20g polytetrafluoroethylene emulsion (purchased from Dongguan Xingwang Plastic Raw Materials Co., Ltd., solid content: 60%, particle size: 0.2 μm), stirred for 300 minutes, and mixed evenly to prepare a precursor solution;

[0051] (2) The obtained precursor spinning solution is subjected to electrospinning to obtain a precursor fiber film, and the electrospinning is carried out in an air environment with a relative humidity of 35%, and a constant temperature heat field of 30°C is applied in the spinning interval, and the receiving device The temperature of the electrospinning is 30°C, and the parameters of the electrospinning are: perfusion...

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Abstract

The invention provides a method for preparing a sponge-shaped porous carbon fiber membrane. The method is characterized by comprising the following steps: 1, preparing a precursor spinning solution, wherein the precursor spinning solution comprises a macromolecule polymer carbon source, a solvent, a cross-linking agent and a pore forming agent; 2, carrying out electrostatic spinning on the obtained precursor spinning solution so as to obtain a precursor fiber membrane; 3, calcining the obtained precursor fiber membrane in an air atmosphere so as to obtain a pre-oxidized fiber membrane; and 4,carrying out high-temperature carbonization on the pre-oxidized fiber membrane in the presence of nitrogen or an inert gas, thereby obtaining the sponge-shaped porous carbon fiber membrane. The fibermaterial prepared by using the method is high in porosity, large in specific surface area and controllable in surface morphology, pores are inter-linked and are uniformly distributed, and meanwhile, aformed three-dimensional network fiber membrane has adjustable thicknesses, and has excellent conductivity, mechanical flexibility and super-hydrophobicity as well.

Description

technical field [0001] The invention relates to a preparation method of a porous carbon fiber material, in particular to a controllable preparation method of a 3D spongy whole-body porous carbon fiber membrane, which belongs to the technical field of new materials and chemical engineering. Background technique [0002] Due to the advantages of high strength, low density, high temperature resistance, high electrical conductivity and stable physical and chemical properties, carbon fiber has developed rapidly; among them, porous carbon materials are widely used in energy harvesting and storage devices due to their unique structure and characteristics, and gas adsorption And storage devices, sewage treatment devices, electrocatalytic supports and filters. Compared with porous carbon particles, porous carbon fibers have greater development prospects, and it is easier to construct independent 2D films or 3D blocks without the use of binders, so the porous properties can be well ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28D01F9/21B01J20/30
CPCB01J20/20B01J20/28038B01J2220/4806B01J2220/4812D01F9/21
Inventor 闫建华董珂琪赵云王啸俞建勇丁彬
Owner DONGHUA UNIV
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