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Method for preparing cotton stalk bark microcrystalline cellulose/graphene oxide aerogel fiber

A technology of alkene aerogel fiber and microcrystalline cellulose is applied in the field of preparing cotton stalk skin microcrystalline cellulose/graphene oxide aerogel fiber, which can solve problems such as resource waste and environmental pollution, and achieve short mass transfer distance. , Solve the difficulty of easy agglomeration and recycling, and the effect of large specific surface

Pending Publication Date: 2020-12-08
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to improve the adsorption capacity of cellulose airgel, improve the shrinkage produced in the preparation process, and solve the problems of environmental pollution and waste of resources, the present invention provides a method for preparing a new type of adsorption fiber, the purpose of which is to remove dyes in polluted wastewater, reduce Its pollution to the environment enriches the types of cellulose fibers

Method used

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  • Method for preparing cotton stalk bark microcrystalline cellulose/graphene oxide aerogel fiber
  • Method for preparing cotton stalk bark microcrystalline cellulose/graphene oxide aerogel fiber
  • Method for preparing cotton stalk bark microcrystalline cellulose/graphene oxide aerogel fiber

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Embodiment 1

[0030] The preparation method of the cotton stalk bark microcrystalline cellulose airgel fiber in the present embodiment comprises the following steps:

[0031] (1) Dissolving: add cotton stalk husk microcrystalline cellulose (prepared by referring to the method in Example 1 in Patent No. 201710847371.7) to the melted 1-butyl 2-methylimidazolium chloride salt, and the cotton stalk husk is slightly The mass ratio of crystalline cellulose to 1-butyl 2-methylimidazolium chloride salt is 3:100, keep the temperature at 80°C and continue to stir for 2 hours to dissolve the solution;

[0032] (2) Add dimethyl sulfoxide to the dissolving solution in step (1) to obtain cotton stalk bark microcrystalline cellulose spinning solution; wherein the quality of dimethyl sulfoxide is 1-butyl 2-methylimidazole 50% of the mass ratio of chlorine salt;

[0033] (3) Degassing: the cotton stalk skin microcrystalline cellulose spinning solution obtained in step (2) was continuously stirred for 3 hou...

Embodiment 2

[0040] The preparation method of the cotton stalk bark microcrystalline cellulose / graphene oxide airgel fiber in the present embodiment comprises the following steps:

[0041] (1) Dissolving: add cotton stalk husk microcrystalline cellulose (prepared by referring to the method in Example 1 in Patent No. 201710847371.7) to the melted 1-butyl 2-methylimidazolium chloride salt, and the cotton stalk husk is slightly The mass ratio of crystalline cellulose to 1-butyl 2-methylimidazolium chloride salt is 3:100, and the temperature is kept at 80° C. and stirred for 2 hours to obtain a solution;

[0042] (2) Composite: use an ultrasonic disperser to disperse graphene oxide with a specification of 0.5 to 4 nm evenly in dimethyl sulfoxide, and then add the graphene oxide and dimethyl sulfoxide mixture to the step (1 ) in the solution to obtain cotton stalk skin microcrystalline cellulose / graphene oxide spinning solution; wherein the quality of graphene oxide is 4% of the cotton stalk sk...

Embodiment 3

[0050] The preparation method of the cotton stalk bark microcrystalline cellulose / graphene oxide airgel fiber of the present embodiment comprises the following steps:

[0051] (1) Dissolving: add cotton stalk husk microcrystalline cellulose (prepared by referring to the method in Example 1 in Patent No. 201710847371.7) to the melted 1-butyl 2-methylimidazolium chloride salt, and the cotton stalk husk is slightly The mass ratio of crystalline cellulose to 1-butyl 2-methylimidazolium chloride salt is 3:100, and the temperature is kept at 80° C. and stirred for 2 hours to obtain a solution;

[0052] (2) Composite: use an ultrasonic disperser to disperse graphene oxide with a specification of 0.5 to 4 nm evenly in dimethyl sulfoxide, and then add the graphene oxide and dimethyl sulfoxide mixture to the step (1 ) in the solution to obtain cotton stalk skin microcrystalline cellulose / graphene oxide spinning solution; wherein the quality of graphene oxide is 6% of the quality of cott...

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Abstract

The invention discloses a method for preparing cotton stalk bark microcrystalline cellulose / graphene oxide aerogel fiber, and belongs to the technical field of waste biomass resource reutilization andthe field of environmental protection for reducing dye pollution and purifying water resources. Cotton stalk bark microcrystalline cellulose is used as a raw material, a 1-butyl 2-methylimidazolium chloride and dimethyl sulfoxide dissolving system is used for dissolving, graphene oxide is used as a filler for compounding, a wet spinning technology is used for spinning, and the cotton stalk bark microcrystalline cellulose / graphene oxide aerogel fiber is prepared by using a freeze drying technology. The adsorption capacity of the aerogel fiber to methylene blue is 40.3-104.8 mg / g, and the breaking strength is 0.23-0.79 cN / tex. The raw materials used in the method are wide in source and cheap, the solvent is green and free of pollution, the preparation process is simple and convenient, and the prepared aerogel fiber has good adsorption capacity on methylene blue in an aqueous solution.

Description

technical field [0001] The invention relates to a method for preparing cotton stalk husk microcrystalline cellulose / graphene oxide airgel fiber by using cotton stalk husk microcrystalline cellulose and graphene oxide, which belongs to the technical field of waste biomass resource reuse and the reduction of dye pollution and purification The field of water resources and environmental protection. Background technique [0002] Dye pollution will cause serious harm to human health and social development, so research on adsorbent materials has been going on. Due to its structural characteristics, cellulose itself has a certain adsorption effect on dyes. However, studies have found that the direct use of natural cellulose for the adsorption of substances has some disadvantages, such as small adsorption capacity and low selectivity. In order to enhance the adsorption capacity of cellulose materials for heavy pollutants, they are usually modified. The invention prepares the airge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/24B01J20/20B01J20/28023B01J20/28047C02F1/288B01J2220/4825C02F2101/308
Inventor 魏春艳李阵群张妍
Owner DALIAN POLYTECHNIC UNIVERSITY
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