Preparation method of ordered mesoporous carbon nanofibers

A nano-carbon fiber and orderly technology, applied in the field of nano-porous carbon fiber preparation, to achieve the effects of high mesoporosity, high carbon yield, and good chemical stability

Active Publication Date: 2016-07-20
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pores generally obtained are disordered pores, and the use of silicon-based templates requires the use of dangerous reagents such as hydrofluoric acid.

Method used

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  • Preparation method of ordered mesoporous carbon nanofibers
  • Preparation method of ordered mesoporous carbon nanofibers
  • Preparation method of ordered mesoporous carbon nanofibers

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A method for preparing ordered mesoporous carbon nanofibers, comprising the following steps:

[0031] (1) Preparation of ethanol solution of phenolic resin / polyvinylpyrrolidone / triblock copolymer / inorganic salt

[0032] First dissolve the block copolymer F127 in absolute ethanol, and stir at -10°C to obtain a homogeneous solution. After 10 minutes, magnesium nitrate was added, and the mass ratio of inorganic salt to phenolic resin was 1:2. Continue stirring until completely dissolved. Then add phenolic resin ethanol solution (average molecular weight is 500), the ratio of phenolic resin and block copolymer is 1:2. Stirring was continued for 2h. Finally, polyvinylpyrrolidone was added, and the mass fraction of polyvinylpyrrolidone was 3%. After stirring for 10 h, a homogeneous solution was obtained. The mixed solution was subjected to defoaming treatment, and then sealed and stood at room temperature for 1 day to obtain a spinning solution.

[0033] (2) Preparation...

Embodiment 2

[0041] A method for preparing ordered mesoporous carbon nanofibers, comprising the following steps:

[0042] (1) Preparation of ethanol solution of phenolic resin / polyvinylpyrrolidone / triblock copolymer / inorganic salt

[0043] First dissolve the block copolymer P123 in absolute ethanol and stir at 45°C to obtain a homogeneous solution. After 10 minutes, ferric chloride was added, and the mass ratio of inorganic salt to phenolic resin was 2:1. Continue stirring until completely dissolved. Then add phenolic resin ethanol solution (average molecular weight is 1000), the ratio of phenolic resin and block copolymer is 2:3. Stirring was continued for 3h. Finally, polyvinylpyrrolidone was added, and the mass fraction of polyvinylpyrrolidone was 4%. After stirring for 13h, a homogeneous solution was obtained. The mixed solution was subjected to defoaming treatment, and then sealed and stood at room temperature for 1.5 days to obtain a spinning solution.

[0044] (2) Preparation ...

Embodiment 3

[0052] A method for preparing ordered mesoporous carbon nanofibers, comprising the following steps:

[0053] (1) Preparation of ethanol solution of phenolic resin / polyvinylpyrrolidone / triblock copolymer / inorganic salt.

[0054] First dissolve the block copolymer F127 in absolute ethanol, and stir at 50°C to obtain a uniform solution. After 10 minutes, add magnesium chloride, and the mass ratio of inorganic salt to phenolic resin is 3:1. Continue stirring until completely dissolved. Then add phenolic resin ethanol solution (average molecular weight is 1500), the ratio of phenolic resin and block copolymer is 1:2. Stirring was continued for 4h. Finally, polyvinylpyrrolidone was added, and the mass fraction of polyvinylpyrrolidone was 5%. After stirring for 16h, a homogeneous solution was obtained. The mixed solution was subjected to defoaming treatment, and then sealed and allowed to stand at room temperature for (2) days to obtain a spinning solution.

[0055] (2) Preparat...

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Abstract

The invention relates to a preparation method of carbon nanofibers with ordered mesoporous structures and a product prepared from the carbon nanofibers. The preparation method of the carbon nanofibers comprises the following steps of firstly, preparing phenolic resin, polyvinylpyrrolidone, an amphiphilic copolymer, inorganic salts and ethanol into a solution according to a certain proportion; secondly, preparing carbon nanofiber precursors by electrostatic spinning; thirdly, curing the carbon nanofiber precursors; fourthly, performing carbonizing and acid pickling to obtain the carbon nanofibers. The method is simple in process, low in cost and suitable for large-scale continuous production. The prepared carbon fibers contain abundant ordered mesopores; pore canals are parallel to the direction of a fiber axis, the diameters of the fibers are 300 to 900nm, pore sizes can be adjustable between 3nm and 20nm, the porosity is 80 to 97 percent, and the specific surface area is 100 to 1000m<2>/g; the carbon nanofibers have potential application in aspects of capacitors, lithium batteries, catalyst carriers, drug carriers, adsorbents and the like.

Description

Technical field: [0001] The invention belongs to the technical field of nanoporous carbon fiber preparation, and relates to a preparation method of nanoporous carbon fiber with ordered mesopores and a product thereof. Background technique [0002] Porous carbon materials are widely used in water and air due to their high specific surface area and developed porosity, good chemical stability, excellent high temperature stability, high electrical conductivity, long cycle life and environmental friendliness. purification, gas separation, catalysis, chromatography, energy storage and other fields. As a new type of porous carbon material, nanoporous carbon fiber has a higher outer surface, shorter pore depth, more uniform pore size distribution, and higher molding and weaving properties unique to fiber materials. It has great potential in the field of adsorption and separation. Significantly enhanced mass transfer rate, higher energy storage density and higher rate performance in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/24
CPCD01F9/24
Inventor 马昌史景利盛杰李正一
Owner TIANJIN POLYTECHNIC UNIV
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