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A kind of graphene oxide/nanocellulose airgel and its preparation method and application

A nanocellulose and graphene technology, which is applied in chemical instruments and methods, water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of complex preparation process, high cost, and difficulty in popularization and application, and achieves simple process, Low requirements, suitable for large-scale promotion and utilization

Active Publication Date: 2018-07-03
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a graphene oxide / nanocellulose airgel, so as to solve the problems that the existing graphene / cellulose composite airgel material has complex preparation process, high cost and difficult popularization and application

Method used

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  • A kind of graphene oxide/nanocellulose airgel and its preparation method and application
  • A kind of graphene oxide/nanocellulose airgel and its preparation method and application
  • A kind of graphene oxide/nanocellulose airgel and its preparation method and application

Examples

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Comparison scheme
Effect test

Embodiment 1

[0046] A kind of graphene oxide / nanocellulose airgel is prepared by the method comprising the following steps:

[0047] 1) Dispersing the nanocellulose in hydrochloric acid to make a nanocellulose dispersion; the concentration of the nanocellulose dispersion is 1mg / ml;

[0048] 2) Mix the graphene oxide dispersion with the nanocellulose dispersion obtained in step 1), and perform a hydrothermal reaction at 180° C. for 20 hours to obtain a hydrogel; the concentration of the graphene oxide dispersion is 3 mg / ml, and the graphite oxide The mass ratio of alkene to nanocellulose is 45:1;

[0049] 3) The hydrogel obtained in step 2) is freeze-dried at -50°C and 10Pa to obtain the hydrogel.

[0050] The application of the graphene oxide / nanocellulose airgel of this example in the adsorption and removal of phenol in aqueous phenol solution.

Embodiment 2

[0052] A kind of graphene oxide / nanocellulose airgel is prepared by the method comprising the following steps:

[0053] 1) Dispersing the nanocellulose in hydrochloric acid to make a nanocellulose dispersion; the concentration of the nanocellulose dispersion is 2mg / ml;

[0054] 2) Mix the graphene oxide dispersion with the nanocellulose dispersion obtained in step 1), and perform a hydrothermal reaction at 180° C. for 20 hours to obtain a hydrogel; the concentration of the graphene oxide dispersion is 3 mg / ml, and the graphite oxide The mass ratio of alkene to nanocellulose is 45:2;

[0055] 3) The hydrogel obtained in step 2) is freeze-dried at -50°C and 10Pa to obtain the hydrogel.

[0056] The application of the graphene oxide / nanocellulose airgel of this example in the adsorption and removal of phenol in aqueous phenol solution.

Embodiment 3

[0058] A kind of graphene oxide / nanocellulose airgel is prepared by the method comprising the following steps:

[0059] 1) Dispersing the nanocellulose in hydrochloric acid to make a nanocellulose dispersion; the concentration of the nanocellulose dispersion is 3mg / ml;

[0060] 2) Mix the graphene oxide dispersion with the nanocellulose dispersion obtained in step 1), and perform a hydrothermal reaction at 180° C. for 20 hours to obtain a hydrogel; the concentration of the graphene oxide dispersion is 3 mg / ml, and the graphite oxide The mass ratio of alkene to nanocellulose is 45:3;

[0061] 3) The hydrogel obtained in step 2) is freeze-dried at -50°C and 10Pa to obtain the hydrogel.

[0062] The application of the graphene oxide / nanocellulose airgel of this example in the adsorption and removal of phenol in aqueous phenol solution.

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Abstract

The invention discloses a graphene oxide / nano cellulose aerogel and a preparation method and an application thereof, and belongs to the technical field of aerogel material. The aerogel is prepared by the method including the following steps: 1) dispersing nano cellulose in hydrochloric acid to prepare a nano cellulose dispersion liquid; 2) mixing a graphene oxide dispersion liquid with the nano cellulose dispersion liquid obtained in the step 1) evenly, and carrying out a hydrothermal reaction at the temperature of 170-190 DEG C to obtain a hydrogel; and 3) carrying out freeze drying of the hydrogel obtained in the step 2) to obtain the aerogel. According to the graphene oxide / nano cellulose aerogel provided by the invention, nano cellulose and graphene oxide as raw materials are subjected to hydrothermal reaction to prepare the hydrogel, the hydrogel is further subjected to freeze drying to obtain the final product. Compared with a graphene oxide aerogel, the aerogel has better removal effect on phenol in a phenol aqueous solution, can be used for removal of organic dye molecules or other impurities in sewage, and efficiently purifies the sewage.

Description

technical field [0001] The invention belongs to the technical field of airgel materials, in particular to a graphene oxide / nanocellulose airgel and its preparation method and application. Background technique [0002] Airgel is a special gel that removes the original liquid in the gel or replaces it with gas to obtain a fluffy and porous interior, but does not change the original network structure or volume size. , is the product obtained after hydrogel or organic gel is dried by a certain method under certain conditions. Airgel materials use gas instead of liquid as the dispersion medium, and use the solid phase as the network skeleton of the gel, and its pore structure reaches the nanometer level. This continuous three-dimensional nano-network structure makes airgel have unique properties, such as high specific surface area, ultra-low density, low dielectric constant, low thermal conductivity, unique optical and acoustic properties, etc., so it is often used Used in wast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/075C08L1/02C08K3/04C02F1/28
CPCC02F1/288C08J3/075C08K3/04C08L1/02
Inventor 何领好崔冰冰蔡立芳王晓辉张治红
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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