Porous carbon material taking polyvinylidene fluoride as precursor and preparation method

A polyvinylidene fluoride and porous carbon material technology, which is applied in the field of porous carbon material production, can solve the problems of cumbersome steps, complicated operation process of template method, limited large-scale application, etc., and achieves the effects of uniform pore size distribution and simple operation process.

Inactive Publication Date: 2016-02-03
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the template method has problems such as complicated operation process and cumbersome steps, which limit its large-scale application.

Method used

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  • Porous carbon material taking polyvinylidene fluoride as precursor and preparation method
  • Porous carbon material taking polyvinylidene fluoride as precursor and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add quantitative 6.67g of polyvinylidene fluoride to 20mL of dimethylacetamide, add 2.0g of polyvinylpyrrolidone, and stir at 60°C for 12 hours until the polymer and surfactant are completely dissolved and a transparent solution is obtained . Cast the solution on a clean, anhydrous watch glass, and dry the solvent in a blast oven at 40°C. A clear yellow film was formed.

[0016] Cut the above-mentioned polyvinylidene fluoride precursor material into small thin strips with scissors, weigh about 2.0g, put it into a porcelain boat, and put it into a tube furnace with a quartz tube, so that the sample is in the effective heating area, and the entire gas is sealed. After ensuring that the system has good airtightness, close the valve, use a vacuum pump to pump the air in the tube furnace until it is negative pressure (-1MPa), and then close the vacuum valve. Open the valve for feeding nitrogen, open the nitrogen bottle and let nitrogen flow at room temperature until the pr...

Embodiment 2

[0018] Add quantitative 5.0g of polyvinylidene fluoride to 20mL of N-methylpyrrolidone, and add 1.0g of polyethylene glycol (molecular weight: 6000), and stir at 75°C for 12 hours until completely dissolved and uniform to obtain a transparent solution. Cast the solution on a clean, anhydrous watch glass, and dry the solvent in a blast oven at 40°C. A clear yellow film was formed.

[0019] Cut the above-mentioned polyvinylidene fluoride precursor material into small thin strips with scissors, weigh about 2.0g, put it into a porcelain boat, and put it into a tube furnace with a quartz tube, so that the sample is in the effective heating area, and the entire gas is sealed. After ensuring that the system has good airtightness, close the valve, use a vacuum pump to pump the air in the tube furnace until it is negative pressure (-1MPa), and then close the vacuum valve. Open the valve for feeding nitrogen, open the nitrogen bottle and let nitrogen flow at room temperature until the ...

Embodiment 3

[0021] Add quantitative 8.0g polyvinylidene fluoride to 20mL dimethylformamide, add 4.0g polyvinylpyrrolidone, and stir at 70°C for 12 hours until the polymer and surfactant are completely dissolved and a transparent solution is obtained . Cast the solution on a clean, anhydrous watch glass, and dry the solvent in a blast oven at 40°C. A clear yellow film was formed.

[0022] Cut the above-mentioned polyvinylidene fluoride precursor material into small thin strips with scissors, weigh about 2.0g, put it into a porcelain boat, and put it into a tube furnace with a quartz tube, so that the sample is in the effective heating area, and the entire gas is sealed. After ensuring that the system has good airtightness, close the valve, use a vacuum pump to pump the air in the tube furnace until it is negative pressure (-1MPa), and then close the vacuum valve. Open the valve for feeding nitrogen, open the nitrogen bottle and let nitrogen flow at room temperature until the pressure ins...

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Abstract

The invention relates to a porous carbon material taking polyvinylidene fluoride as a precursor and a preparation method, belonging to the technical field of porous carbon material production. The method specifically comprises the steps of sufficiently dissolving polyvinylidene fluoride raw powder and an additive in a solvent according to a mass ratio under a certain temperature, flow-casting obtained solution on clean watch glass to form a thin layer, drying at 40 DEG C to obtain a polyvinylidene fluoride slice, and heating the polyvinylidene fluoride precursor to 500 to 1000 DEG C under nitrogen protection in a tube furnace for carbonization, thus obtaining the porous carbon material. The method is simple and convenient in operation process and free of complex production equipment, the product can be obtained only by the process of dissolving, curing and high temperature carbonization without subsequent treatment; the obtained carbon material has an adjustable porous structure, the pore size distribution is uniform and is 2 to 5nm, and a specific surface area range is 700 to 1200m<2>/g.

Description

technical field [0001] The invention relates to a porous carbon material with polyvinylidene fluoride as a precursor and a preparation method thereof, belonging to the technical field of porous carbon material production. Background technique [0002] Due to the advantages of large specific surface area, high stability, controllable pore structure, and adjustable surface chemical properties, carbon materials have broad application prospects in many fields such as gas separation, adsorbents, hydrogen storage materials, catalyst supports, and electrode materials. . [0003] At present, there are many methods for the synthesis of porous materials, and the commonly used methods mainly include activation method and template method. Activation methods include: chemical activation, physical activation or combination of physical and chemical activation, catalytic activation of carbon precursors, mixed carbonization of carbonizable and pyrolyzable polymers, carbonization activation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02
Inventor 纪妍妍赵博化婷邓轩余利彬
Owner TIANJIN POLYTECHNIC UNIV
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