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Waste cellulose acetate fiber-based regenerated cellulose aerogel and preparation method thereof

A regenerated cellulose and fiber-based technology, which is applied to the field of waste acetate-cellulose-based regenerated cellulose aerogel and its preparation, can solve the problems that waste cigarette filters cannot be efficiently reused, etc. , the effect of high porosity

Pending Publication Date: 2021-09-21
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a waste acetate-based regenerated cellulose airgel and its preparation method, which solves the problem that waste cigarette filters cannot be reused efficiently

Method used

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  • Waste cellulose acetate fiber-based regenerated cellulose aerogel and preparation method thereof
  • Waste cellulose acetate fiber-based regenerated cellulose aerogel and preparation method thereof
  • Waste cellulose acetate fiber-based regenerated cellulose aerogel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] 3.5 g of sodium hydroxide and 6 g of urea were dissolved in 40.5 g of deionized water, and then placed in a refrigerator for 20 min. 2 g of the recovered cigarette filter was dissolved in the prepared sodium hydroxide / urea aqueous solution, and then frozen for 12 h. Then the frozen solution system was thawed at room temperature, and 50 mL of ethanol was added to vigorously stir to precipitate regenerated cellulose, and left to stand for 24 hours to obtain a mixed solution containing regenerated cellulose. Then the mixed solution containing the regenerated cellulose was washed by centrifugation for 6 times at a rotating speed of 8000r / min, and each time was 5min. Then dry at 60°C to obtain regenerated cellulose. 1mmol of zinc nitrate and 4mmol of 2-methylimidazole were respectively dissolved in 25mL of methanol solution, and then the two solutions were mixed and stirred for 10min to obtain a mixed solution. The prepared regenerated cellulose was dispersed in the mixed ...

Embodiment 2

[0039] 3.5 g of sodium hydroxide and 6 g of urea were dissolved in 40.5 g of deionized water, and then placed in a refrigerator for 20 min. 1 g of the recovered cigarette filter was dissolved in the prepared sodium hydroxide / urea aqueous solution, and then frozen for 12 hours. Then the frozen solution system was thawed at room temperature, and 50 mL of ethanol was added to vigorously stir to precipitate regenerated cellulose, and left to stand for 24 hours to obtain a mixed solution containing regenerated cellulose. Then the mixed solution containing the regenerated cellulose was centrifuged and washed 8 times at a rotation speed of 10000 r / min, and each time was 5 minutes. Then dry at 80°C to obtain regenerated cellulose. 1mmol of zinc nitrate and 4mmol of 2-methylimidazole were respectively dissolved in 25mL of methanol solution, and then the two solutions were mixed and stirred for 10min to obtain a mixed solution. The prepared regenerated cellulose was dispersed in the m...

Embodiment 3

[0042] 14 g of sodium hydroxide and 24 g of urea were dissolved in 162 g of deionized water, and then placed in a refrigerator for 20 min. 5 g of recovered cigarette filters were dissolved in the prepared sodium hydroxide / urea aqueous solution, and then frozen for 12 h. Then the frozen solution system was thawed at room temperature, and 150 mL of ethanol was added to vigorously stir to precipitate the regenerated cellulose, and left to stand for 24 hours to obtain a mixed solution containing regenerated cellulose. Then the mixed solution containing the regenerated cellulose was centrifuged and washed 10 times at a rotational speed of 10000 r / min, each time for 5 minutes. Then dry at 65°C to obtain regenerated cellulose. 4mmol of zinc nitrate and 16mmol of 2-methylimidazole were respectively dissolved in 25mL of methanol solution, and then the two solutions were mixed and stirred for 20min to obtain a mixed solution. The prepared regenerated cellulose was dispersed in the mix...

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Abstract

The invention discloses a waste cellulose acetate fiber-based regenerated cellulose aerogel and a preparation method thereof, and belongs to the technical field of composite materials. The method comprises the steps: dissolving a cigarette filter tip in the obtained sodium hydroxide / urea aqueous solution to obtain a solution system; freezing and then unfreezing the obtained solution system, continuously adding ethanol after unfreezing, and separating out regenerated cellulose to obtain a mixed solution containing the regenerated cellulose; centrifugally washing the mixed solution containing the regenerated cellulose, and drying to obtain the regenerated cellulose; uniformly dispersing zinc nitrate and 2-methylimidazole in methanol to obtain a mixed solution; and dispersing the obtained regenerated cellulose in the obtained mixed solution to obtain a reaction system, carrying out in-situ generation on the obtained reaction system, loading an MOF material, and carrying out freeze drying to obtain the waste cellulose acetate fiber-based regenerated cellulose aerogel. According to the invention, the problem that the waste cigarette filter cannot be efficiently recycled is solved, and the waste cellulose acetate fiber-based regenerated cellulose aerogel with low density, high specific surface area and high porosity is prepared.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a waste acetate-based regenerated cellulose airgel and a preparation method thereof. Background technique [0002] Cellulose airgel has the advantages of high porosity, high specific surface area, low density, good biodegradability, etc., and has certain application prospects in the fields of mechanics, electrochemistry, and heat. Cellulose airgel can be mainly divided into natural cellulose aerogel, cellulose derivative aerogel and regenerated cellulose aerogel according to the source. And composite aerogels with desired properties can be prepared by modification, loading and other methods. [0003] With the rapid development of human industrialization and the depletion of non-renewable resources, environmental pollution and energy crisis have become two major problems. One is the treatment of environmental pollution. Environmental pollution brought about by industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08L1/12C08L87/00
CPCC08J9/28C08J2301/12C08J2487/00C08J2201/0502
Inventor 程有亮张庆玲方长青石嘉钰
Owner XIAN UNIV OF TECH
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