A method for preparing modified cotton stalk sheath microcrystalline cellulose/graphene oxide composite fiber

A composite technology of microcrystalline cellulose and graphene, which is applied in the direction of artificial filaments made of cellulose derivatives, fiber chemical characteristics, chemical instruments and methods, etc., can solve problems such as environmental pollution and resource waste, and achieve easy solution Difficult agglomeration recovery, short mass transfer distance, and high adsorption selectivity

Active Publication Date: 2021-07-20
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to 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 heavy metals in polluted wastewater, reduce its pollution to the environment, improve the utilization value of waste cotton stalks, and increase social economic benefits

Method used

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  • A method for preparing modified cotton stalk sheath microcrystalline cellulose/graphene oxide composite fiber
  • A method for preparing modified cotton stalk sheath microcrystalline cellulose/graphene oxide composite fiber
  • A method for preparing modified cotton stalk sheath microcrystalline cellulose/graphene oxide composite fiber

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Embodiment 1

[0032] The preparation method of modified cotton stalk sheath microcrystalline cellulose / graphene oxide composite fiber of the present invention, it comprises the steps:

[0033] (1) Modification: the cotton stalk skin microcrystalline cellulose (prepared with reference to the method in Example 1 in Patent Application No. 201710847371.7) was placed in 15wt% NaOH solution, stirred magnetically at 60°C for 2 hours, and the product Wash and filter repeatedly with deionized water and dry in an oven at 80°C for 3 hours. The alkali-treated cotton stalk sheath microcrystalline cellulose fiber was added to the melted maleic anhydride, the mass ratio of maleic anhydride to maleic anhydride was 1:6, the temperature was heated to 65°C and mechanical stirring was continued for 2 hours. After stirring, drop pyridine (accounting for 3% of the quality of the modified cotton stalk skin microcrystalline cellulose) and continue to heat up to 90°C and continue to stir for 6 hours. Drying in an ...

Embodiment 2

[0042] The preparation method of modified cotton stalk sheath microcrystalline cellulose / graphene oxide composite fiber of the present invention, it comprises the steps:

[0043] (1) Modification: the cotton stalk skin microcrystalline cellulose (prepared with reference to the method in Example 1 in Patent Application No. 201710847371.7) was placed in 15wt% NaOH solution, stirred magnetically at 60°C for 2 hours, and the product Wash and filter repeatedly with deionized water and dry in an oven at 80°C for 3 hours. The alkali-treated cotton stalk sheath microcrystalline cellulose fiber was added to the melted maleic anhydride, the mass ratio of maleic anhydride to maleic anhydride was 1:6, the temperature was heated to 65°C and mechanical stirring was continued for 2 hours. After stirring, drop pyridine (accounting for 3% of the quality of cotton stalk skin microcrystalline cellulose) and continue to heat up to 90°C and continue to stir for 6 hours. Drying in medium temperatu...

Embodiment 3

[0052] The preparation method of modified cotton stalk sheath microcrystalline cellulose / graphene oxide composite fiber of the present invention, it comprises the steps:

[0053] (1) Modification: the cotton stalk skin microcrystalline cellulose (prepared with reference to the method in Example 1 in Patent Application No. 201710847371.7) was placed in 15wt% NaOH solution, stirred magnetically at 60°C for 2 hours, and the product Wash and filter repeatedly with deionized water and dry in an oven at 80°C for 3 hours. The alkali-treated cotton stalk sheath microcrystalline cellulose fiber was added to the melted maleic anhydride, the mass ratio of maleic anhydride to maleic anhydride was 1:6, the temperature was heated to 65°C and mechanical stirring was continued for 2 hours. After stirring, drop pyridine (accounting for 3% of the quality of cotton stalk skin microcrystalline cellulose) and continue to heat up to 90°C and continue to stir for 6 hours. Drying in medium temperatu...

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Abstract

The invention discloses a method for modifying cotton stalk sheath microcrystalline cellulose / graphene oxide composite fiber, which belongs to the technical field of recycling waste biomass resources and the field of reducing heavy metal pollution, purifying water resources and environmental protection. The invention uses cotton stalk bark microcrystalline cellulose as raw material, uses maleic anhydride to modify, uses [Bmim]Cl ionic liquid and dimethyl sulfoxide solution system to dissolve, uses graphene oxide as filler to compound, and uses wet The modified composite fiber was spun by the conventional spinning technology, and the adsorption capacity of the copper ion was 24.38mg / g, the fiber linear density was 18.02tex, and the breaking strength was 28.25cN. The raw material sources used in the invention are wide and cheap, the preparation process is simple and convenient, and the prepared modified composite fiber has better adsorption capacity for copper ions in aqueous solution.

Description

technical field [0001] The invention relates to a method for preparing modified cotton stalk husk microcrystalline cellulose / graphene oxide composite fiber by using cotton stalk husk microcrystalline cellulose and graphene oxide. Background technique [0002] The problem of heavy metal pollution in my country's water is becoming more and more serious, and the content of heavy metal ions exceeds the standard, which causes serious harm to human health and social development. Therefore, it is urgent to control heavy metal pollution. Because cellulose materials have the advantages of strong adsorption capacity, renewability, environmental protection and low price, they are very suitable as adsorbents for treating pollutants in wastewater. Cellulose not only exists widely in nature, but also can be obtained from various crops. my country, as a large cotton industry country, has abundant cotton stalk resources, with an annual output of 15.3 million tons of cotton stalks and 4 mill...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/44D01F2/24D01F1/10C08F251/02C08F222/06B01J20/24B01J20/28B01J20/30C02F1/28C02F101/20
Inventor 魏春艳李阵群吕丽华
Owner DALIAN POLYTECHNIC UNIVERSITY
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