Hierarchical porosity carbon fiber material, preparation method and application thereof

A carbon fiber and hierarchical hole technology, applied in the field of materials, can solve the problems of low utilization level of sisal fiber and low added value, and achieve the effects of high output and simple preparation process

Active Publication Date: 2014-07-09
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the current utilization level of sisal fiber is low, and the added value is not high. Therefore, it is necessary to make full and effective use of this high-yield renewable resource and develop the application of sisal fiber in new technologies, new materials and new energy to improve its Added value has important practical significance

Method used

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  • Hierarchical porosity carbon fiber material, preparation method and application thereof
  • Hierarchical porosity carbon fiber material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The steps of preparing hierarchical porous carbon fiber material with sisal fiber as raw material are as follows:

[0032](1) Wash the sisal fibers, cut them to a length of 0.1-0.5 cm for each fiber, and then place them in an oven to dry at 100°C for 6 hours.

[0033] (2) placing the pretreated sisal fiber in step (1) in a carbonization furnace, under a nitrogen atmosphere with a flow rate of 400ml / min, heat up to 500°C with a heating rate of 5°C / min, and then carbonize at a constant temperature After 3 hours, the layered porous carbon fiber material was obtained.

[0034] The scanning electron microscope of the hierarchical porous carbon fiber material prepared by the above steps is as follows: figure 1 shown in A and B.

[0035] The specific surface area (BET) of the prepared hierarchical porous carbon fiber material was 298m, tested by nitrogen adsorption method and PoreMaster60 mercury porosimeter produced by American Micromeritics company. 2 / g, the pore volume ...

Embodiment 2

[0039] The steps of preparing high specific surface area hierarchical porous carbon fiber material with sisal fiber as raw material are as follows:

[0040] (1) 5g KOH is dissolved in the solvent obtained after mixing 10ml water and 6ml absolute ethanol to obtain a solution containing etchant KOH, then 1g of the hierarchical porous carbon fiber prepared in Example 1 is added, fully stirred, and the The mixture was dried at 100°C for 6h;

[0041] (2) The dried mixture was placed in a carbonization furnace, and in a nitrogen atmosphere with a flow rate of 400ml / min, the temperature was raised to 900°C at a heating rate of 5°C / min, and after constant temperature activation for 3h, the temperature of the carbonization furnace decreased to The mixture was taken out at 50°C, and the solution obtained by mixing 100ml of deionized water and 10ml of 37% hydrochloric acid was washed three times under boiling conditions, and once with 200ml of deionized water, filtered and dried at 110°C...

Embodiment 3

[0046] The steps of preparing high specific surface area hierarchical porous carbon fiber material with sisal fiber as raw material are as follows:

[0047] (1) dissolve 3g KOH in the solvent obtained after mixing 10ml water and 6ml absolute ethanol to obtain a solution containing etchant KOH, then add 1g of the hierarchical porous carbon fiber material prepared in Example 1, fully stir, The mixture was dried at 100°C for 6h;

[0048] (2) The dried mixture was placed in a carbonization furnace, and in a nitrogen atmosphere with a flow rate of 400ml / min, the temperature was raised to 900°C at a heating rate of 5°C / min, and after constant temperature activation for 3h, when the temperature of the carbonization furnace dropped to The mixture was taken out at 50°C, and the solution obtained by mixing 100ml of deionized water and 10ml of 37% hydrochloric acid was washed three times with boiling, and once with 200ml of deionized water, filtered and dried at 110°C for 12 hours to obt...

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Abstract

The invention belongs to the technical field of materials, and discloses a hierarchical porosity carbon fiber material, a preparation method and an application thereof. Cleaned sisal fiber which is cut or woven into a special shape is used as raw material, and is subjected to constant temperature carbonization for 0.5 to 6 h at 300-900 DEG C in an inert atmosphere to obtain hierarchical porosity carbon fiber; and then the obtained hierarchical porosity carbon fiber is uniformly mixed with potassium hydroxide solution, dried and subjected to constant temperature activation for 0.5-6 hours at 500-900 DEG C, and then is subjected to acid washing, water washing, filtering and drying to obtain hierarchical porosity carbon fiber material with high specific surface. The hierarchical porosity carbon fiber material of the invention has the following advantages: the preparation method is simple and easy, the raw material is environment-friendly, the production cost is low, the obtained hierarchical porosity carbon fiber and the obtained hierarchical porosity carbon fiber material with high specific surface have unique hierarchical porous structures, the specific surface of the hierarchical porosity carbon fiber material is up to 3,350 m2 / g, and the material has good adsorptive property, is in shapes of rope, felt, cloth, paper and the like, is convenient to use, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a hierarchical porous carbon fiber material prepared by using sisal fibers and a preparation method and application thereof. Background technique [0002] In recent years, hierarchical porous carbon materials have attracted increasing attention in the field of materials science. This is because hierarchical porous carbon materials have ternary nanoporous structures with adjustable and controllable pore diameters and reasonable distribution of micro, mesopore and macropores. Unique binary / ternary structure interaction features: macropores provide efficient proton transport sites, which can greatly reduce the diffusion resistance, mesopores can act as proton transport channels, and micropores and / or mesopores can improve reactive species. The degree of dispersion and provide enough active centers. Studies have confirmed that these characteristics enable hierarchical ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/16D01F11/10B01J20/20B01J20/28B01J20/30H01G9/042
CPCY02E60/13
Inventor 吴丁财梁业如吴炳明符若文
Owner SUN YAT SEN UNIV
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