Preparation method of continuous cellulose-carbon nanomaterial composite aerogel fibers

A carbon nanomaterial, composite aerogel technology, applied in the chemical characteristics of fibers, man-made filaments made of viscose, wet spinning, etc.

Active Publication Date: 2016-11-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there is no report on the method of in-situ adding carbon nanoma

Method used

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  • Preparation method of continuous cellulose-carbon nanomaterial composite aerogel fibers
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  • Preparation method of continuous cellulose-carbon nanomaterial composite aerogel fibers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 The preparation method 1 of continuous cellulose / carbon nanotube composite airgel fiber

[0029] making process:

[0030] Disperse bacterial cellulose in a low-temperature solvent system with a mass fraction of 7% NaOH / 8% urea / 10% thiourea, wherein the mass fraction of bacterial cellulose is 2%, and the mass fraction is 0.5% of hydroxylated multi-walled carbon nano Tube, mechanically stirred for 30 minutes, degassed with a centrifuge at 10,000r / min for 20 minutes, and wet-spun with a volume fraction of 10% ethanol aqueous solution as a coagulation bath, and the extrusion speed of the spinning stock solution was 0.6m / min . The cellulose gel fiber containing hydroxylated multi-walled carbon nanotubes formed in the coagulation bath was 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, the fiber is washed with deionized water to neutrality, then the dei...

Embodiment 2

[0034] Embodiment 2 Preparation method 2 of continuous cellulose-carbon nanomaterial composite airgel fiber

[0035] making process:

[0036] 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 hydroxylated multi-walled carbon nanotubes with a mass fraction of 1% are added, mechanically vigorously stirred for 30min, and degassed with a centrifuge at 10000r / min for 20min, to The aqueous ethanol solution with a volume fraction of 50% was used as a coagulation bath for wet spinning, and the extrusion speed of the spinning stock solution was 3 m / min. The cellulose gel fiber containing hydroxylated multi-walled carbon nanotubes formed in the coagulation bath was wound at a winding speed of 6 m / min. The wou...

Embodiment 3

[0039] Embodiment 3 The preparation method 3 of continuous cellulose / graphene composite airgel fiber

[0040] making process:

[0041] Disperse bacterial cellulose in a low-temperature solvent system with a mass fraction of 9.5% NaOH / 4.5% thiourea, wherein the mass fraction of bacterial cellulose is 7%, add graphene with a mass fraction of 0.5%, stir mechanically for 30 minutes, and centrifuge Machine 10000r / min for defoaming treatment 20min, volume fraction of 10% acetone aqueous solution as coagulation bath, wet spinning, the extrusion speed of spinning stock solution is 2.4m / min. The graphene-containing cellulose gel fibers formed in the coagulation bath were wound at a winding speed of 6 m / min. The wound fiber was immersed in pure acetone solution for 20min to make it completely gelled. After aging, the fibers are washed with deionized water until neutral, and freeze-dried to obtain cellulose / graphene composite airgel fibers.

[0042] Result detection:

[0043] The spi...

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Abstract

The invention provides a preparation method of continuous cellulose-carbon nanomaterial composite aerogel fibers. The method comprises steps as follows: a cellulose dispersion liquid is prepared to serve as a spinning solution, and a carbon nanomaterial is added; an acidic solution, an ethanol solution or an acetone solution is added to a coagulating basin to serve as a coagulating bath; the spinning solution with the carbon nanomaterial added is added to the coagulating bath for wet spinning, and cellulose gel fibers containing the carbon nanomaterial is obtained; the cellulose gel fibers containing the carbon nanomaterial are wound, immersed in an ageing solution to be aged at the normal temperature for 15 min-1 h, washed with deionized water to be neutral, then subjected to solvent replacement with deionized water, ethanol or tertiary butanol and dried, and the continuous cellulose-carbon nanomaterial composite aerogel fibers are obtained. According to the preparation method, the preparation process is simple, the spinnability is good, environmental protection and no pollution are realized, and the prepared continuous cellulose-carbon nanomaterial composite aerogel fibers have good flexibility, rich pores and a large specific surface area.

Description

technical field [0001] The invention relates to the field of preparation of airgel fibers, in particular to a preparation method of continuous cellulose-carbon nanomaterial composite airgel fibers. Background technique [0002] Gas sensors are devices or systems that convert gas species and concentration information into measurable signals. Compared with large and expensive gas analysis instruments, they have the advantages of small size, low cost, real-time and online. Because the principle of most gas sensing is based on the adsorption and desorption of gas molecules on the sensing material, the sensitivity of the sensor will be greatly increased by increasing the contact area between the detection object and the sensing material. Airgel is a highly porous solid material filled with gas in a pore or three-dimensional network structure. Because of its extremely high specific surface area and highly porous structure, airgel is an ideal material for the adsorption and storag...

Claims

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Application Information

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IPC IPC(8): D01F2/08D01F1/10D01D5/06
CPCD01D5/06D01F1/10D01F2/08
Inventor 朱美芳张君妍陈文萍孙宾王浩
Owner DONGHUA UNIV
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