Graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel and preparation method thereof

A technology of nanocellulose and polyvinyl alcohol, which is applied in the field of graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel and its preparation, can solve the problems of insufficient performance, limited use, etc., and can reduce heat. Effects of loss, increased mechanical strength, increased compressive modulus

Active Publication Date: 2021-10-08
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of insufficient performance and limited use of the single-component airgel composed of graphene airgel as a single main body in the prior art, the present invention provides a graphene / nanocellulose / polyvinyl alcohol ternary composite airgel Glue and its preparation method

Method used

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  • Graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel and preparation method thereof
  • Graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel and preparation method thereof
  • Graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel and preparation method thereof

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Embodiment 1

[0025] The invention provides a graphene / nanocellulose / polyvinyl alcohol ternary composite airgel, which is prepared according to the following steps:

[0026] (1) Preparation of graphene oxide / nanocellulose mixed solution: first weigh 0.25 grams of graphene oxide solid with an electronic balance, dissolve it in 10 ml of deionized water, and stir for 1 hour until the graphene oxide powder is completely dissolve. Then use an electronic balance to weigh 0.05 grams of nanocellulose solids, slowly pour it into 10 ml of graphene oxide solution that has just been prepared, and stir for 3 hours until the solution is evenly mixed to obtain graphene oxide / nanometer cellulose mixture.

[0027] (2) Preparation of graphene / nanocellulose / polyvinyl alcohol hydrogel: first prepare a polyvinyl alcohol solution. First weigh 12.5 g of polyvinyl alcohol solid with an electronic balance, and dissolve it in 50 ml of deionized water. Stir the polyvinyl alcohol solution while heating, and keep st...

Embodiment 2

[0030] Graphene / nanocellulose / polyvinyl alcohol ternary composite airgel is prepared according to the following steps:

[0031] (1) Preparation of graphene oxide / nanocellulose mixed solution: first weigh 0.25 grams of graphene oxide solid with an electronic balance, dissolve it in 10 ml of deionized water, and stir for 1 hour until the graphene oxide powder is completely dissolve. Then use an electronic balance to weigh 0.1 g of nanocellulose solids, slowly pour it into 10 ml of graphene oxide solution that has just been prepared, and stir for 6 hours until the solution is evenly mixed to obtain graphene oxide / nanocellulose mixture.

[0032] (2) Preparation of graphene / nanocellulose / polyvinyl alcohol hydrogel: first prepare a polyvinyl alcohol solution. First weigh 12.5 g of polyvinyl alcohol solid with an electronic balance, and dissolve it in 50 ml of deionized water. Stir the polyvinyl alcohol solution while heating, and keep stirring at 90° C. for 2 hours to obtain a co...

Embodiment 3

[0035] Graphene / nanocellulose / polyvinyl alcohol ternary composite airgel is prepared according to the following steps:

[0036] (1) Preparation of graphene oxide / nanocellulose mixed solution: first weigh 0.25 grams of graphene oxide solid with an electronic balance, dissolve it in 10 ml of deionized water, and stir for 1 hour until the graphene oxide powder is completely dissolve. Then use an electronic balance to weigh 0.15 grams of nanocellulose solids, slowly pour it into the 10 ml graphene oxide solution that has just been prepared, and stir for 3 hours until the solution is evenly mixed to obtain graphene oxide / nanometer cellulose mixture.

[0037](2) Preparation of graphene / nanocellulose / polyvinyl alcohol hydrogel: first prepare a polyvinyl alcohol solution. First weigh 12.5 g of polyvinyl alcohol solid with an electronic balance, and dissolve it in 50 ml of deionized water. Stir the polyvinyl alcohol solution while heating, and keep stirring at 80° C. for 2 hours to ...

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Abstract

The invention relates to the field of preparation of composite materials, and discloses a graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel, and in the graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel, the content of nanocellulose is 15 wt%-50 wt%, and the content of polyvinyl alcohol is 5 wt%-10 wt%. The preparation method of the aerogel comprises the following steps: (1) preparing a graphene oxide/nanocellulose mixed solution; (2) preparing graphene/nano cellulose hydrogel; (3) preparing graphene/nanocellulose/polyvinyl alcohol hydrogel; and (4) preparing the graphene/nanocellulose/polyvinyl alcohol ternary composite aerogel. According to the invention, the problems that the graphene aerogel is insufficient in mechanical property and unitary aerogel composed of a single main body is insufficient in performance and limited in use are solved.

Description

technical field [0001] The invention belongs to the field of preparation of composite materials, in particular to a graphene / nanocellulose / polyvinyl alcohol ternary composite airgel and a preparation method thereof. Background technique [0002] Graphene airgel has a porous interconnected three-dimensional sponge-like network structure with graphene as the main body. As an emerging nanoporous material, due to its high hydrophobicity, high specific surface area, high porosity and good chemical stability, it has shown good performance in the fields of adsorption, catalysis, sensing, energy conversion and storage, and biomedicine. application prospects. However, due to the existence of van der Waals force and π-π bond force between graphene sheets, it is prone to irreversible stacking and agglomeration, thus weakening the advantages of graphene itself. At the same time, the application of graphene aerogels in real life is limited due to its insufficient mechanical properties ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/02C08L29/04C08K3/04C08J9/28C08J3/075
CPCC08J9/28C08J9/0061C08J9/0071C08J3/075C08J2205/026C08J2301/02C08J2429/04C08K3/042
Inventor 刘镇波王秀雅解彭博万珂苗媛媛
Owner NORTHEAST FORESTRY UNIVERSITY
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