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Graphene oxide reinforced cellulose-based material with oriented structure and preparation method

A cellulose-based and graphene-based technology, applied in the field of cellulose-based composite materials, can solve problems such as poor stability, heavy pollution, and high cost, and achieve the effects of improving compressive strength, wide application, and improving tensile strength

Active Publication Date: 2021-02-26
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, since cellulose airgel is made of cellulose, the cellulose needs to be dissolved to form a gel, which will destroy the crystal structure of cellulose and affect the strength of the airgel.
In addition, in the research on the development of new cellulose aerogels, people have prepared more new cellulose-based composite materials with excellent comprehensive properties through the multi-level structure design of cellulose itself, combined with inorganic nanoparticles and solvent systems, etc. Such as ionic liquid, NaOH / urea, NMMO / water, LiCl / DMAc, etc., but these solvent systems have their own shortcomings, such as high cost, heavy pollution or poor stability, etc.

Method used

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  • Graphene oxide reinforced cellulose-based material with oriented structure and preparation method
  • Graphene oxide reinforced cellulose-based material with oriented structure and preparation method
  • Graphene oxide reinforced cellulose-based material with oriented structure and preparation method

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Experimental program
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Effect test

Embodiment 1

[0040]A preferred embodiment of the present invention provides a method for preparing a graphene oxide reinforced cellulose-based material with an oriented structure, and the specific steps are as follows:

[0041]S1. Dissolve microcrystalline cellulose in the dimethylacetamide solvent of anhydrous lithium chloride to obtain a cellulose solution; the ratio of anhydrous lithium chloride to dimethylacetamide in the cellulose solution is 8g:100mL;

[0042]S2. Replace the water in the graphene oxide aqueous solution with dimethylacetamide by rotary evaporation to obtain a graphene oxide solution;

[0043]S3. Mix the cellulose solution obtained in step S1 and the graphene oxide solution obtained in step S2, and stir for 30 minutes to obtain a mixed solution; the cellulose content in the mixed solution is 60 mg / mL, and the graphene oxide content is 0.5 mg / mL;

[0044]S4. Pour the mixed solution obtained in step S3 into the mold, and leave it in the open space for 7 days. After the gel is completely g...

Embodiment 2

[0046]A preferred embodiment of the present invention provides a method for preparing a graphene oxide reinforced cellulose-based material with an oriented structure, and the specific steps are as follows:

[0047]S1. Dissolve microcrystalline cellulose in the dimethylacetamide solvent of anhydrous lithium chloride to obtain a cellulose solution; the ratio of anhydrous lithium chloride to dimethylacetamide in the cellulose solution is 8g:100mL;

[0048]S2. Replace the water in the graphene oxide aqueous solution with dimethylacetamide by rotary evaporation to obtain a graphene oxide solution;

[0049]S3. Mix the cellulose solution obtained in step S1 and the graphene oxide solution obtained in step S2, and stir for 30 minutes to obtain a mixed solution; the cellulose content in the mixed solution is 60 mg / mL, and the graphene oxide content is 0.05 mg / mL;

[0050]S4. Pour the mixed solution obtained in step S3 into the mold, and leave it in the open space for 7 days. After the gel is completely ...

Embodiment 3

[0052]A preferred embodiment of the present invention provides a method for preparing a graphene oxide reinforced cellulose-based material with an oriented structure, and the specific steps are as follows:

[0053]S1. Dissolve microcrystalline cellulose in the dimethylacetamide solvent of anhydrous lithium chloride to obtain a cellulose solution; the ratio of anhydrous lithium chloride to dimethylacetamide in the cellulose solution is 8g:100mL;

[0054]S2. Replace the water in the graphene oxide aqueous solution with dimethylacetamide by rotary evaporation to obtain a graphene oxide solution;

[0055]S3. Mix the cellulose solution obtained in step S1 and the graphene oxide solution obtained in step S2, and stir for 30 minutes to obtain a mixed solution; the cellulose content in the mixed solution is 60 mg / mL, and the graphene oxide content is 0.1 mg / mL;

[0056]S4. Pour the mixed solution obtained in step S3 into the mold, and leave it in the open space for 7 days. After the gel is completely g...

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Abstract

The invention discloses a graphene oxide-reinforced cellulose-based material with an orientation structure and a preparation method thereof. By adding graphene oxide into the cellulose and using directional freezing technology to construct the cellulose into an orientation porous structure, a cellulose-based material with orientation structure is prepared. A cellulose-based material with an oriented pore structure, which effectively improves the compressive strength of the material by imitating the oriented pore structure of wood in nature.

Description

Technical field[0001]The invention belongs to the technical field of cellulose-based composite materials, and specifically relates to a graphene oxide reinforced cellulose-based material with an oriented structure and a preparation method thereof.Background technique[0002]Bio-based materials refer to a new type of material that uses renewable materials, including crops, trees and other plants and their residues and inclusions as raw materials, through biological, chemical and physical methods, and is green, environmentally friendly, and raw materials. Renewable and biodegradable characteristics. Utilizing abundant agricultural and forestry biomass resources, the development of bio-based materials can replace traditional materials such as chemical synthetic resins and even metal cement to the greatest extent. It is currently a strategic emerging industry in my country, showing a trend of rapid growth. Among them, cellulose is the most abundant natural polymer compound in the world. C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L1/04C08K3/04C08J9/28
CPCC08J9/0071C08J9/286C08J2201/0484C08J2205/026C08J2301/04C08K2201/011C08K3/042
Inventor 王勇曹胜黄雪刚黄婷杨静晖祁晓东张楠
Owner SOUTHWEST JIAOTONG UNIV