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Cellulose-molybdenum disulfide aerogel composite fiber and preparation method and application thereof

A molybdenum disulfide and composite fiber technology, applied in the field of composite fibers, can solve the problems of restricting the use environment of cellulose-based aerogels, the complexity and price of nanocellulose, and the preparation method has not yet been reported, and achieves the preparation of green, pollution-free, Low cost and improved mechanical properties

Active Publication Date: 2019-04-12
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cellulose-based aerogels have shown good and extensive application prospects in recent years, there are still some defects in some aspects.
First of all, most of the cellulose-based airgel materials that have been developed are in the form of blocks or sheets. Since this type of cellulose-based airgel is limited by its own shape, it brings many problems in molding, drying and washing. Inconvenient; secondly, cellulose is a flammable substance, so airgel materials prepared from cellulose as a base material also have this flammability, which will also limit the use environment of cellulose-based aerogels; finally, Since cellulose airgel is a flexible material, there are still some defects in mechanical properties.
Although in recent years, with the development of nanotechnology, researchers from various countries have used nanocellulose to enhance the mechanical properties of cellulose aerogels, but due to the complexity of nanocellulose preparation and the high price, its application prospects are not considered. promising
[0004] At present, there is no report about a kind of cellulose-molybdenum disulfide airgel composite fiber and its preparation method

Method used

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  • Cellulose-molybdenum disulfide aerogel composite fiber and preparation method and application thereof
  • Cellulose-molybdenum disulfide aerogel composite fiber and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] (1) At a temperature of -12°C, put 0.5g cellulose into the sodium hydroxide / urea / water solution system, which is sodium hydroxide (mass fraction 7%), urea (mass fraction 12%) and water (mass fraction 81%) in a mixed solution system for 10 minutes to prepare a cellulose solution with a mass fraction of 0.5%.

[0044] (2) Molybdenum trioxide, thioacetamide and urea were respectively dissolved in water according to the mass ratio of 1:1:9, stirred evenly, and then the mixed solution was placed in a high-pressure reactor at 180°C for 18 hours, After the reaction, the product was washed to neutrality to obtain 1T metal phase molybdenum disulfide. Finally, an ultrasonic cleaner was used to oscillate and disperse 1T metal phase molybdenum disulfide in water at an ultrasonic oscillation amplitude of 20% for 10 minutes to obtain mass 1% 1T metallic phase molybdenum disulfide aqueous solution.

[0045](3) The cellulose solution and the 1T metal phase molybdenum disulfide aqueous...

Embodiment 2

[0049] (1) At the temperature of -15°C, put 4g cellulose into the sodium hydroxide / urea / water solution system, which is sodium hydroxide (mass fraction 7%), and urea (mass fraction 12%) and water (mass fraction 81%) %) in a mixed solution system for 20 minutes to obtain a cellulose solution with a mass fraction of 4%.

[0050] (2) respectively dissolving molybdenum trioxide, thioacetamide and urea in water according to the mass ratio of 1.2:1.2:10, stirring evenly, and then placing the mixed solution in an autoclave at 200°C for 20 hours, After the reaction, the product was washed to neutrality to obtain 1T metal phase molybdenum disulfide. Finally, an ultrasonic cleaner was used to oscillate and disperse 1T metal phase molybdenum disulfide in water at an ultrasonic oscillation amplitude of 80% for 60 minutes to obtain quality 1T metallic phase molybdenum disulfide aqueous solution with a fraction of 5%.

[0051] (3) The cellulose solution and the 1T metal phase molybdenum di...

Embodiment 3

[0055] (1) At a temperature of -20°C, put 2g of cellulose into the sodium hydroxide / urea / water solution system, which is sodium hydroxide (mass fraction 7%), and urea (mass fraction 12%) and water (mass fraction 81%) %) in a mixed solution system for 60 minutes to obtain a cellulose solution with a mass fraction of 2%.

[0056] (2) respectively dissolving molybdenum trioxide, thioacetamide and urea in water according to the mass ratio of 1.5:1.5:15, stirring evenly, then placing the mixed solution in an autoclave at 220° C. for 24 hours, After the reaction, the product was washed to neutrality to obtain 1T metal phase molybdenum disulfide. Finally, an ultrasonic cleaner was used to oscillate and disperse 1T metal phase molybdenum disulfide in water at an ultrasonic oscillation amplitude of 40% for 30 minutes to obtain mass 1T metallic phase molybdenum disulfide aqueous solution with a fraction of 10%.

[0057] (3) The cellulose solution and the 1T metal phase molybdenum disul...

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Abstract

The invention belongs to the field of the composite fiber, and discloses a cellulose-molybdenum disulfide aerogel composite fiber and a preparation method and application thereof. The preparation method comprises the following steps: taking cellulose as a base material, dissolving the cellulose to manufacture a cellulose solving liquid, mixing the molybdenum disulfide with the cellulose solving liquid, and then spinning and regenerating the mixed solution of the molybdenum disulfide and the cellulose solving liquid by adopting a wet-spinning technology, thereby preparing the cellulose-molybdenum disulfide hydrogel composite fiber; and finally dehydrating and drying the cellulose-molybdenum disulfide hydrogel composite fiber to obtain the cellulose-molybdenum disulfide aerogel composite fiber. The cellulose-molybdenum disulfide aerogel composite fiber prepared through the method has excellent porous structure, high specific surface area, high mechanical performances, good machinability,excellent heat insulation performance and inflaming retardant performance, and extensive in application prospect.

Description

technical field [0001] The invention belongs to the field of composite fibers, and in particular relates to a cellulose-molybdenum disulfide airgel composite fiber and a preparation method and application thereof. Background technique [0002] Airgel, also known as xerogel. When most of the solvent is removed from the gel, the liquid content in the gel is much less than the solid content, or the medium filled in the space network structure of the gel is gas, and the appearance is solid, which is an aerogel. Airgel is a porous solid material with a three-dimensional network structure. It has excellent properties such as large specific surface area, high porosity, and low thermal conductivity. It has a wide range of applications in thermal insulation, energy, adsorption, and catalysis. At present, aerogels are mainly divided into two categories: inorganic aerogels and organic aerogels. Compared with inorganic aerogels, organic aerogels with good mechanical properties and flex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/02D01F1/07
CPCD01F1/07D01F2/02
Inventor 祁海松张存智梁肇峰沈林陈贵娴王莎麟魏晓婷万江云
Owner SOUTH CHINA UNIV OF TECH
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