Micron fiber reinforced cellulose composite aerogel as well as preparation method and application thereof

A composite airgel and micron fiber technology, which is applied in separation methods, chemical instruments and methods, alkali metal compounds, etc., can solve the problem of poor mechanical properties of cellulose airgel, failure to meet the needs of use, and poor oil absorption and sound absorption effects etc. to achieve good mechanical properties, low density and high oil affinity

Pending Publication Date: 2022-03-15
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the fact that cellulose aerogel has many scientific research and application values, more and more scientific researchers have participated in the development of cellulose aerogel, but the mechanical properties of cellulose aerogel are poor, and the oil absorption and sound absorption effects are not good. , cannot meet the demand for its use

Method used

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  • Micron fiber reinforced cellulose composite aerogel as well as preparation method and application thereof
  • Micron fiber reinforced cellulose composite aerogel as well as preparation method and application thereof
  • Micron fiber reinforced cellulose composite aerogel as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Preparation of Carboxymethyl Cellulose Composite Airgel Containing Feather Silk

[0037] Get the feather silk of 0.4g and the sodium dodecylbenzenesulfonate of 0.1g, be dissolved in 200ml deionized water then, place in the magnetic stirrer and mix evenly; Take by weighing 6g sodium carboxymethylcellulose and slowly add in the solution, Thoroughly stir to dissolve; measure 6g of glutaraldehyde (50%) as a cross-linking agent and add to the mixed solution, fully stir evenly. Let it stand for 72 hours, import it into the mold and put it into the refrigerator for pre-freezing for 4 hours, then refrigerate for 12 hours, then put it into a vacuum freeze dryer and dry it for 72 hours to obtain the carboxymethyl cellulose composite airgel containing feather silk.

[0038] The mass and size of the composite airgel were measured with a balance and a digital vernier caliper, the results are shown in Table 1, and the density calculation of the composite airgel is shown in the formul...

Embodiment 2

[0067] Carboxymethylcellulose Composite Airgel Containing Dumplings

[0068] Take 0.4g of velvet and 0.1g of sodium dodecylbenzenesulfonate, then dissolve them in 200ml of deionized water, place them in a magnetic stirrer and mix them evenly; weigh 6g of carboxymethylcellulose sodium and slowly add them into the solution, Thoroughly stir to dissolve; measure 6g of glutaraldehyde (50%) as a cross-linking agent and add to the mixed solution, fully stir evenly. Let it stand for 72 hours, introduce it into the mold and put it into the refrigerator for pre-freezing for 4 hours, then refrigerate it for 12 hours, put it into a vacuum freeze dryer and dry it for 72 hours to obtain the carboxymethyl cellulose composite airgel containing velvet.

[0069] The testing methods of density and porosity are as in the above-mentioned Example 1, and the results are shown in Table 4.

[0070] Table 4

[0071] Density (g / cm 3 )

Porosity Composite airgel with fluff 0.0074...

Embodiment 3

[0080] Preparation of hydroxyethyl cellulose composite airgel containing feather silk:

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Abstract

The invention provides micron fiber reinforced cellulose composite aerogel as well as a preparation method and application thereof, the preparation method comprises the following steps: step 1, adding micron fibers into an aqueous solution containing a surfactant, and uniformly stirring and mixing to obtain a microfiber dispersion liquid; 2, adding a cellulose derivative and a cross-linking agent into the micron fiber dispersion liquid, and performing stirring, standing and freeze drying to obtain cellulose composite aerogel; the addition amount of the cellulose derivative is 0.5-10%, and the addition amount of the cross-linking agent is 0.1-10%. The micron fiber reinforced cellulose composite aerogel disclosed by the invention has better mechanical properties and can be applied to the fields of oil absorption materials, sound absorption materials, heat insulation, heat preservation, wastewater treatment and the like.

Description

technical field [0001] The invention relates to the technical field of airgel material preparation, in particular to a microfiber-reinforced cellulose composite airgel and its preparation method and application. Background technique [0002] As one of the lightest solid materials in the world, airgel not only has a three-dimensional network nanoporous material, but also has a porosity of over 90% and a specific surface area of ​​up to 900m 2 / g, the density can be as low as 3kg / m 3 . Airgel is to directly evaporate the ice crystals in the gel through various drying methods to form a three-dimensional network structure filled with gas, remove most of the solvent in the gel, and make the solid content in the gel account for the main proportion of the entire gel. The airgel material whose space medium is gas. Due to its special three-dimensional network structure endowed with excellent characteristics such as low density, low thermal conductivity, high porosity, and high spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08J5/04C08L1/28C08L89/00C08L1/02B01J20/24B01J20/28B01J20/30C02F1/28C02F1/40
CPCC08J9/28C08J5/045B01J20/24B01J20/28011B01J20/28047C02F1/286C02F1/40C08J2205/026C08J2201/0484C08J2301/28C08J2489/00C08J2401/02
Inventor 方寅春刘新华孙卫昊
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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