Graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel and preparation method and application thereof

A technology of nanocellulose and polyvinyl alcohol, which is applied to conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problem of graphene-nanocellulose-polyvinyl alcohol composite conductive materials that do not have good mechanical properties and electrical conductivity. Gel and other problems, to achieve the effect of strong plasticity, good self-healing function and good biocompatibility

Inactive Publication Date: 2017-05-31
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, there is no graphene-nanocellulose-polyvinyl alcohol composite conductive gel with good mechanical properties and electrical conductivity.

Method used

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  • Graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel and preparation method and application thereof
  • Graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel and preparation method and application thereof
  • Graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Step 1, the preparation of graphene dispersion liquid and nanocellulose suspension, its concrete method step comprises:

[0057] (1) Weigh 5g of polyvinylpyrrolidone and add it to 500g of absolute ethanol, stir and dissolve (magnetic stirring at 40-50°C until the powder is completely dissolved to form a uniform and transparent solution, the same below), as a graphene dispersant. (2) Add 2.5g of multi-walled graphene, and ultrasonically disperse for 10 minutes at a power of 700w to prepare a graphene dispersion (concentration of about 0.5%). (3) Take 20 g of pulverized absorbent cotton and add it to 400 g of sulfuric acid with a mass fraction of 48%, and carry out acidolysis for 60 minutes under magnetic stirring in a constant temperature water bath at 45°C. (4) Deionized water was added to terminate the acid hydrolysis reaction, and the resulting mixture was rinsed repeatedly with deionized water, and then transferred to a dialysis bag for dialysis for 3 days until the ...

Embodiment 2

[0061] Step 1, the preparation of graphene dispersion liquid and nanocellulose suspension, its concrete method step comprises:

[0062] (1) Weigh 5g of polyvinylpyrrolidone and add it to 500g of absolute ethanol, stir to dissolve, and use it as a graphene dispersant. (2) Add 2.5g of multi-walled graphene, and ultrasonically disperse for 10 minutes at a power of 700w to prepare a graphene dispersion (concentration of about 0.5%). (3) Take 20 g of pulverized absorbent cotton and add it to 400 g of sulfuric acid with a mass fraction of 48%, and carry out acidolysis for 60 minutes under magnetic stirring in a constant temperature water bath at 45°C. (4) Deionized water was added to terminate the acid hydrolysis reaction, and the obtained mixture was repeatedly rinsed with deionized water, then transferred to a dialysis bag and dialyzed in flowing water for 3 days until the pH was neutral. (5) Ultrasonic pulverize the above mixture for 150 minutes at a power of 900w, and then adju...

Embodiment 3

[0066] Step 1, the preparation of graphene dispersion liquid and nanocellulose suspension, its concrete method step comprises:

[0067] (1) Weigh 5g of polyvinylpyrrolidone into 500g of absolute ethanol, stir to dissolve. (2) Add 2.5g of multi-walled graphene, and ultrasonically disperse for 10 minutes at a power of 700w to prepare a graphene dispersion (concentration of about 0.5%). (3) Take 20 g of pulverized absorbent cotton and add it to 400 g of sulfuric acid with a mass fraction of 48%, and carry out acidolysis for 60 minutes under magnetic stirring in a constant temperature water bath at 45°C. (4) Deionized water was added to terminate the acid hydrolysis reaction, and the obtained mixture was repeatedly rinsed with deionized water, then transferred to a dialysis bag and dialyzed in flowing water for 3 days until the pH was neutral. (5) Ultrasonic pulverize the above mixture for 150 minutes at a power of 900w, and then adjust the concentration to 1.0%, thereby obtainin...

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Abstract

The invention belongs to the field of macromolecule composite conductive materials, and discloses a graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel and a preparation method and an application thereof. The graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel is prepared by the following steps of a, preparing a graphite dispersing liquid; b, preparing a nanocellulose suspension liquid; c, mixing the graphite dispersing liquid and the nanocellulose suspension liquid, adding a polyvinyl alcohol water solution and a crosslinking agent, stirring, and forming a gel, so as to obtain the hydrogel. The graphite-nanocellulose-polyvinyl alcohol composite conductive hydrogel can be used for preparing flexible conductive materials, and has better application prospect.

Description

technical field [0001] The invention relates to a preparation method of graphene nano-cellulose polyvinyl alcohol composite conductive gel. The invention belongs to the field of polymer composite conductive materials. Background technique [0002] Polyvinyl alcohol (PVA) hydrogel is a water-swellable body with a network structure formed after hydrophilic polyvinyl alcohol macromolecules are cross-linked. Many hydroxyl groups on the PVA molecular chain are easy to form hydrogen bonds, so PVA hydrogel has stable chemical properties, easy to shape, good biocompatibility, non-toxic and harmless, these characteristics make PVA hydrogel can be used as wound Dressings, drug release carriers, tissue engineering and other biomedical fields. In order to improve the mechanical properties of PVA hydrogel and expand the application field, PVA hydrogel is often compounded with other materials. PVA hydrogel is added with nanocellulose to enhance mechanical properties, and PVA hydrogel i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J3/075C08L29/04C08L1/04C08L39/06C08K3/04C08K3/38C08B15/02H01B1/24
CPCC08B15/02C08J3/075C08J3/246C08J2329/04C08J2401/04C08L29/04C08L2205/03C08L2205/04C08L2312/00H01B1/24C08L1/04C08L39/06C08K3/04C08K2003/387
Inventor 韩景泉王慧祥徐信武黄超伯岳一莹丁琴琴鲍雅倩陆凯悦王思伟尤立行郁辰陈敏峰
Owner NANJING FORESTRY UNIV
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