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Functional cellulose-based porous material as well as preparation method and application thereof

A cellulose and functionalization technology, applied in chemical instruments and methods, inorganic chemistry, alkali metal compounds, etc., can solve the problems of cumbersome modification, low modification efficiency, and long time consumption, and achieve the effect of safe preparation method

Active Publication Date: 2019-01-25
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a cellulose as the main material, which has high cross-linking and copolymerization functions when the cellulose forms a sol, in view of the shortcomings of the existing cellulose modification process, such as complex, cumbersome, time-consuming, and low modification efficiency. Molecules, one-step preparation of functional cellulose-based porous adsorption materials, which are amidated cellulose-based adsorption materials, can adsorb colored heavy metal ions, anionic dyes, and pigments, and can realize the purification of industrial high-chroma wastewater

Method used

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  • Functional cellulose-based porous material as well as preparation method and application thereof
  • Functional cellulose-based porous material as well as preparation method and application thereof
  • Functional cellulose-based porous material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Weigh 5g of α-cellulose, 1g of N,N'-methylenebisacrylamide, and disperse them in a mixed aqueous solution of 245g of sodium hydroxide and urea (the mass ratio of sodium hydroxide, urea and water is 3:12:85) , Freeze at -12°C for 30 minutes, stir at room temperature for 5 minutes after freezing, let stand at room temperature for 2 hours, soak in pure water until neutral, and obtain 0.2Bisα-cellulose-based porous adsorption material, the Bisα-cellulose-based porous adsorption material BET specific surface area up to 472m 2 / g.

Embodiment 2

[0064] Weigh 5g α-cellulose, 3g N,N'-methylenebisacrylamide, and disperse in the mixed aqueous solution of 245g sodium hydroxide and urea (the mass ratio of sodium hydroxide, urea and water is 3:12:85) , Freeze at -12°C for 30 minutes, stir at room temperature for 5 minutes after freezing to obtain cellulose-based sol; stand at room temperature for 2 hours, soak in pure water until neutral, and obtain 0.6Bis α-cellulose porous adsorption material, the α-cellulose The BET specific surface area of ​​the porous adsorption material can reach 456m 2 / g.

Embodiment 3

[0066] Take by weighing 5g α-cellulose part quality, 5g N, N'-methylenebisacrylamide, be dispersed in the mixed aqueous solution of the sodium hydroxide of 245g and urea (the mass ratio of sodium hydroxide, urea and water is 3:12: 85), frozen at -12°C for 30 minutes, stirred at room temperature for 5 minutes after freezing, to obtain cellulose-based sol; left at room temperature for 2 hours, soaked in pure water until neutral, and obtained 1.0 Bisα-cellulose porous adsorption material, the Bisα- The BET specific surface area of ​​cellulose porous adsorption material can reach 437m 2 / g.

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Abstract

The invention discloses a functional cellulose-based porous material. The functional cellulose-based porous material is prepared in the following method: dispersing a cellulose main body material andfunctional macromolecules in a mixed aqueous solution of sodium hydroxide and urea or thiourea, freezing at the temperature of -30 DEG C to 0 DEG C, stirring at a normal temperature, obtaining cellulose-based sol, gelling at the normal temperature to obtain amido-containing porous cellulose gel, washing to be neutral, and obtaining the cellulose-based functional porous material. The invention alsodiscloses an application of the functional cellulose-based porous material in chroma sewage prevention. Under a condition of normal temperature and alkaline environment, the copolymerization of N,N'-methylene diacrylamide and cellulose molecules without an initiator, the amido bond is introduced onto the cellulose molecule in one step, the preparation method is safe, the prepared amido cellulose-based porous absorption material contains a great amount of amido groups on the surface and also has a porous structure, and the BET specific surface area is greater than or equal to 350 m<2> / g. By adopting the functional cellulose-based porous material, the purification of industrial and food high-chroma waste water can be realized.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a functionalized cellulose-based porous material and a preparation method thereof, and an application of the functionalized cellulose-based porous material in treating dye sewage, food sewage and colored heavy metal ion sewage. Background technique [0002] Chroma sewage has the characteristics of complex composition, deep chroma, high salinity, and strong acidity and alkalinity. 1) Deep chroma. The organic matter in chromatic sewage is mostly based on aromatic groups such as benzene, naphthalene, anthracene, and quinone. The chromaticity is deep, and it is difficult for light to enter the river. Plants such as algae cannot perform photosynthesis, which seriously affects the ecological environment discharged into the water. 2) The composition is complex. Chroma sewage contains not only organic matter, but also some colored heavy metal ions and chelates such as iron, copper, mangan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F251/02C08F222/38B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/261B01J20/28047C02F1/285C02F2101/20C02F2101/203C02F2101/206C02F2101/308C08F251/02C08F222/385
Inventor 李澧陈泰文杨亚莉
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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