A kind of porous regenerated cellulose derivative and its preparation method and application

A technology of regenerated cellulose and derivatives, applied in chemical instruments and methods, other chemical processes, bulk chemical production, etc., can solve the problems of low modification efficiency, insoluble cellulose, poor effect, etc., to improve adsorption performance , Improve toughness and increase specific surface area

Active Publication Date: 2022-06-07
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, cellulose is insoluble in common organic solvents and water
The heterogeneous functional modification of cellulose in the aqueous phase has low efficiency and poor effect, and it is difficult to obtain satisfactory cellulose derivatives

Method used

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  • A kind of porous regenerated cellulose derivative and its preparation method and application
  • A kind of porous regenerated cellulose derivative and its preparation method and application
  • A kind of porous regenerated cellulose derivative and its preparation method and application

Examples

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preparation example Construction

[0028] The preparation method of the porous regenerated cellulose derivative of the present invention, in parts by weight, comprises the following steps:

[0029] 40-100 parts of raw materials are dissolved in 400-1000 parts of ionic liquid and 80-150 parts of solvent, and stirred at 25-100° C. until the raw materials are dissolved. Then add 30-70 parts of epoxy component and 0.5-2.0 parts of initiator, after 0.5-2 hours of reaction, add 20-50 parts of amino acid and 1.0-5.0 parts of amino silicone oil, and continue to react for 0.5-3 hours. The reactants are poured into a mold or casted on a support material, and finally placed in a gel bath, the cellulose derivatives are slowly precipitated and regenerated, and a porous adsorbent is obtained after freeze-drying.

[0030] In the preparation method of the above-mentioned porous regenerated cellulose derivative, the raw material is one of microcrystalline cellulose, absorbent cotton, softwood or hardwood pulp; the ionic liquid ...

Embodiment 1

[0047] (1) Add 40 parts of microcrystalline cellulose, 800 parts of 1-butyl-3-methylimidazolium chloride ionic liquid and 80 parts of dimethyl sulfoxide in a three-necked flask equipped with mechanical stirring, nitrogen, condensation and reflux , heating and mechanical stirring until the microcrystalline cellulose is completely dissolved. After the system was cooled to room temperature, 1.0 part of potassium persulfate was transferred into a three-necked flask, 105 parts of glycidyl methacrylate were added, and the reaction was carried out at room temperature for 0.5 hour. After that, nitrogen flow was stopped, and 108 parts of L-lysine was added to continue the reaction for 3 hours. The reactant is poured into the mold, and then the mold is placed in the gel bath water, the cellulose derivative is slowly precipitated and regenerated, and the porous adsorbent is obtained after freeze-drying.

[0048] (2) At room temperature, prepare 100 mL of 150 mg / L reactive brilliant red ...

Embodiment 2

[0053] (1) Add 40 parts of microcrystalline cellulose, 800 parts of 1-butyl-3-methylimidazolium chloride ionic liquid and 80 parts of dimethyl sulfoxide in a three-necked flask equipped with mechanical stirring, nitrogen, condensation and reflux , heating and mechanical stirring until the microcrystalline cellulose is completely dissolved. After the system was cooled to room temperature, 1.0 part of potassium persulfate was transferred into a three-necked flask, 105 parts of glycidyl methacrylate were added, and the reaction was carried out at room temperature for 0.5 hour. After that, nitrogen flow was stopped, and 108 parts of L-lysine and 1.0 part of amino silicone oil were added to continue the reaction for 3 hours. The reactant is poured into the mold, and then the mold is placed in the gel bath water, the cellulose derivative is slowly precipitated and regenerated, and the porous adsorbent is obtained after freeze-drying.

[0054] (2) At room temperature, prepare 100 mL...

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Abstract

The invention provides a porous regenerated cellulose derivative and its preparation method and application, comprising the following steps: Step 1, adding raw materials into a mixed solution of ionic liquid and solvent, stirring until the raw materials are completely dissolved, and obtaining a raw material liquid; the raw material is micro One of crystalline cellulose, absorbent cotton, coniferous wood pulp or hardwood wood pulp; step 2, adding epoxy components and initiators to the raw material liquid, and adding amino acids after the reaction to continue the reaction to obtain a reaction liquid; step 3, The reaction solution is poured into a mold or film-cast on a supporting material, and then placed in a gel bath, the cellulose derivative is slowly precipitated and regenerated, and the porous regenerated cellulose derivative is obtained after freeze-drying. The regenerated cellulose derivatives of the present invention have obviously different morphological structures and crystal structures, which will also help to improve their adsorption performance.

Description

technical field [0001] The invention belongs to the field of environmental protection, and in particular relates to a porous regenerated cellulose derivative and a preparation method and application thereof. Background technique [0002] Synthetic dyes are widely used in textile, pulping, papermaking, leather, food, printing, plastics and other industries due to their advantages of low cost, bright color and washability. However, after production and processing, 10-15% of the dyes are discharged into wastewater because they are not utilized, resulting in a large amount of colored wastewater. At present, these colored wastewaters are often treated by combined methods such as flocculation sedimentation / activated sludge biodegradation. However, the chromaticity of the wastewater treated in this way is still high, which cannot meet the discharge requirements, and requires further deep decolorization treatment. [0003] Adsorption is the most widely used dye removal method at p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J9/28C08F251/02C08F220/32C08F8/32C08G77/442B01J20/26C02F1/28B01J20/30C08L51/02C08L83/10
CPCC08J5/18C08J9/28C08F251/02C08F8/32C08G77/442B01J20/264C02F1/286C08J2351/02C08J2383/10C08J2201/0544C08F220/325Y02P20/54
Inventor 蒋学孙策陈婷张美云田秀枝
Owner SHAANXI UNIV OF SCI & TECH
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