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A method for post-loading carbon nanomaterials to prepare continuous cellulose/carbon nanomaterial airgel fibers

A carbon nanomaterial and cellulose technology, which is applied in the field of aerogel fiber preparation to achieve the effects of good flexibility, abundant pores and high specific surface area

Active Publication Date: 2019-03-29
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Compared with in-situ addition, the post-loading method increases the subsequent processing process, but it also avoids the problem of nanoparticle agglomeration that may be caused by in-situ addition. The literature of rubber fiber has not been reported yet

Method used

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  • A method for post-loading carbon nanomaterials to prepare continuous cellulose/carbon nanomaterial airgel fibers
  • A method for post-loading carbon nanomaterials to prepare continuous cellulose/carbon nanomaterial airgel fibers
  • A method for post-loading carbon nanomaterials to prepare continuous cellulose/carbon nanomaterial airgel fibers

Examples

Experimental program
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Effect test

Embodiment 1

[0029] Bacterial cellulose (Hainan Yide Food Co., Ltd., crushed compressed coconut) is dispersed 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% (All percentages include itself, the same below), mechanically vigorously stirred for 30 minutes, degassed with a centrifuge at 10000r / min for 20 minutes to obtain a spinning stock solution, and extruded the spinning stock solution into a coagulation bath for wet processing at normal temperature and pressure. Spinning to obtain cellulose gel fibers; the coagulation bath is a 10% ethanol aqueous solution; the extrusion speed of the spinning stock solution is 0.6m / min; the cellulose gel fibers are placed in the coagulation bath After winding at a winding speed of 0.6m / min, soak in aging liquid ethanol and age at room temperature for 1h to make it completely gelled; after aging, wash the fiber with deionized water until neutral, Then place th...

Embodiment 2

[0031]Disperse the treated cotton pulp cellulose in a low-temperature solvent system with a mass fraction of 8% NaOH / 8% urea / 6.5% thiourea, wherein the mass fraction of cotton pulp cellulose is 7%, stir mechanically for 30min, and use a centrifuge 10000r / min carries out defoaming treatment for 20min to obtain the spinning dope, extrudes the spinning dope into a coagulation bath under normal temperature and pressure to carry out wet spinning to obtain cellulose gel fiber; the coagulation bath has a volume fraction of 50 % ethanol aqueous solution; the extrusion speed of the spinning stock solution is 3m / min; after the cellulose gel fiber is wound with a winding speed of 6m / min in the coagulation bath, it is immersed in the aging liquid ethanol Aging at room temperature for 1 hour to make it completely gelled; after aging, wash the fiber with deionized water to neutrality, then place the fiber in an aqueous dispersion of carbon nanotubes with a mass fraction of 0.5%, and raise th...

Embodiment 3

[0033] 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 4%, stir mechanically for 30 minutes, and perform defoaming treatment with a centrifuge at 10,000r / min for 20 minutes to obtain Spinning stock solution, extruding the spinning stock solution into a coagulation bath at normal temperature and pressure for wet spinning to obtain cellulose gel fibers; the coagulation bath is an acetone aqueous solution with a volume fraction of 10%; the spinning The extrusion speed of the silk stock solution is 1.8m / min; after winding the cellulose gel fiber in the coagulation bath with a winding speed of 2m / min, it is immersed in the aging liquid acetone and aged at room temperature for 20min to make it Complete gelation; after aging, wash the fiber with deionized water to neutrality, then place the fiber in a graphene aqueous dispersion with a mass fraction of 1%, and raise th...

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Abstract

The invention discloses a method for preparing continuous cellulose / carbon nanomaterial aerogel fibers through post-supporting of carbon nanomaterials. According to the method, a spinning stock solution is prepared from cellulose; an acidic solution, an ethanol solution or an acetone solution is added to a coagulating basin to serve as a coagulating bath; the spinning stock solution is added to the coagulating bath for wet spinning, and cellulose gel fibers are obtained; the obtained cellulose gel fibers are wound, immersed in an ageing solution to be aged at the normal temperature for 15 min to 1 h, washed to be neutral with deionized water, immersed into a carbon nanomaterial dispersion liquid and washed repeatedly with the deionized water after being taken out, then, solvent replacement and drying are performed, and the cellulose / carbon nanomaterial aerogel fibers are obtained. The method has the characteristics of simple preparation process, good spinnability, environment-friendliness and no pollution. The prepared continuous cellulose / carbon nanomaterial aerogel fibers have good flexibility and have rich pores and high specific surface areas, the specific surface areas of the fibers can be adjusted, the content of the carbon nanomaterials in the fibers can be adjusted, and the cellulose / carbon nanomaterial aerogel fibers have broad application prospect in multiple fields such as sensing, capacitors, electromagnetic shielding, functional clothes, filtration, absorption, catalytic supporting, energy storage and the like.

Description

technical field [0001] The invention belongs to the field of preparation of airgel fibers, in particular to a method for preparing continuous cellulose / carbon nanomaterial airgel fibers by post-loading carbon nanomaterials. 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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M11/74D01F2/02D01F1/10D01F11/02D01D1/02D01D5/06D06M101/06
CPCD01D1/02D01D5/06D01F1/10D01F2/02D01F11/02D06M11/74D06M2101/06
Inventor 朱美芳张君妍陈文萍孟思翁巍
Owner DONGHUA UNIV