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Preparation method of carbon aerogel fibers

A technology of carbon airgel fiber and airgel fiber, which is applied in the field of preparation of carbon airgel fiber, and can solve problems such as unreported

Active Publication Date: 2016-10-12
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention uses cellulose as the precursor of organic airgel fibers to prepare carbon airgel fibers by carbonization, and there is no report on the method for preparing carbon airgel fibers at present

Method used

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  • Preparation method of carbon aerogel fibers
  • Preparation method of carbon aerogel fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 Preparation method 1 of carbon airgel fiber

[0025] Preparation Process:

[0026] Disperse the bacterial cellulose in a low-temperature solvent system with a mass fraction of 7% NaOH / 8% urea / 10% thiourea, wherein the mass fraction of the bacterial cellulose is 5%, stir mechanically for 30 minutes, and use a centrifuge at 10,000r / min to remove After soaking for 20 minutes, wet spinning was carried out with a 10% ethanol aqueous solution as a coagulation bath, and the extrusion speed of the spinning stock solution was 0.6 m / min. The cellulose gel fibers formed in the coagulation bath were wound at a winding speed of 0.6 m / min. The wound fibers were immersed in pure ethanol solution and aged for 1 h to make them completely gelled. After aging, wash the fiber with deionized water to neutrality, then replace the deionized water with tert-butanol, freeze-dry to obtain cellulose airgel fiber, and then put the cellulose airgel fiber into the tube furnace In , t...

Embodiment 2

[0029] Embodiment 2 The preparation method of carbon airgel fiber 2

[0030] Preparation Process:

[0031] Disperse the treated cotton pulp cellulose (the cellulose cotton pulp is mechanically crushed, washed with water and ethanol several times and then dried in a vacuum oven at 50°C) in a mass fraction of 8% NaOH / 8% urea / 6.5% thiourea In the low-temperature solvent system, wherein the mass fraction of cotton pulp cellulose is 7%, the mechanical strength is stirred for 30 minutes, and the degassing treatment is carried out with a centrifuge at 10000r / min for 20 minutes, and the ethanol aqueous solution with a volume fraction of 50% is used as a coagulation bath for wet method For spinning, the extrusion speed of the spinning dope is 3m / min. The cellulose gel fibers formed in the coagulation bath were wound at a winding speed of 6 m / min. The wound fibers were immersed in pure ethanol solution and aged for 1 h to make them completely gelled. After aging, wash the fiber with ...

Embodiment 3

[0033] Example 3 Preparation method of carbon airgel fiber 3

[0034] Preparation Process:

[0035] The bacterial cellulose is dispersed in a low-temperature solvent system with a mass fraction of 9.5% NaOH / 4.5% thiourea, wherein the mass fraction of the bacterial cellulose is 2%, mechanically vigorously stirred for 30 min, and degassed for 20 min with a centrifuge at 10,000 r / min. The acetone aqueous solution with a volume fraction of 10% is used as a coagulation bath for wet spinning, and the extrusion speed of the spinning stock solution is 0.6 m / min. The cellulose gel fibers formed in the coagulation bath were wound at a winding speed of 0.6 m / min. The wound fiber was immersed in pure acetone solution for 20min to make it completely gelled. After aging, wash the fiber with deionized water to neutrality, freeze-dry to obtain cellulose airgel fiber, then put the cellulose airgel fiber into a tube furnace, and carry out carbonization under nitrogen atmosphere, the temperatu...

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Abstract

The invention provides a preparation method of carbon aerogel fibers. The method comprises the following steps that a spinning stock solution is prepared; a coagulating bath is prepared; the spinning stock solution is added into the coagulating bath, wet spinning is conducted, and cellulose gel fibers are obtained; the cellulose gel fibers are subjected to winding and immersed into an ageing solution for normal temperature ageing for 15 min to 1 h, the aged cellulose gel fibers are washed to be neutral with deionized water, solvent replacement is conducted with deionized water or ethyl alcohol or tert butyl alcohol, drying is conducted, and cellulose aerogel fibers are obtained; the cellulose aerogel fibers are put into a tubular furnace to be carbonized in a nitrogen environment, and the carbon aerogel fibers are obtained. The preparation method of the carbon aerogel fibers has the advantages that the raw materials are wide in resource, low in price and easy to obtain, the preparation process is simple, the spinnability is good, and the method is green and environmentally friendly, and the problem that a carbon aerogel cannot form fibers easily is solved.

Description

technical field [0001] The invention relates to the field of carbon airgel research and development, in particular to a preparation method of carbon airgel fibers. Background technique [0002] Carbon airgel is a new type of carbon material with a continuous nanoporous structure, which has a series of excellent properties, such as high specific surface area, high porosity, wide range of density variation, adjustable pore size, low thermal conductivity, and a wide range of It has high and stable conductivity in the temperature range, etc. Therefore, carbon aerogels have broad application prospects in the fields of catalyst supports, artificial muscles, electrodes for batteries and supercapacitors, filtration adsorption, and gas sensing, and have attracted extensive attention. Common carbon aerogels are obtained by carbonizing phenolic organic aerogels, but the precursors of such organic aerogels are highly toxic, which will not only pollute the environment but also harm the ...

Claims

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Application Information

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IPC IPC(8): D01F9/16D01F2/02D01F1/10D01F11/02D01D1/02D01D5/06
CPCD01D1/02D01D5/06D01F1/10D01F2/02D01F9/16D01F11/02
Inventor 朱美芳张君妍陈文萍周哲孟思王浩
Owner DONGHUA UNIV
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