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Nanocellulose/graphene composite flexible thin film as well as preparation method and application thereof

A composite technology of nanocellulose and graphene, which is applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, chemical/physical processes, etc., to achieve simple operation process, facilitate large-scale production, and stable good effect of sex and transparency

Inactive Publication Date: 2018-04-17
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still few technical researches on the development of high-quality graphene and nanocellulose composite film materials, and the development of graphene and nanocellulose composite films is of great significance in the fields of catalysis, energy storage, and flexible electronics.

Method used

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  • Nanocellulose/graphene composite flexible thin film as well as preparation method and application thereof
  • Nanocellulose/graphene composite flexible thin film as well as preparation method and application thereof
  • Nanocellulose/graphene composite flexible thin film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation of nanocellulose / graphene (CNC-G) composite flexible film specifically includes the following steps:

[0042] (1) Composite graphene and nanocellulose: Mix 10ml 19mg / ml nanocellulose aqueous solution and 40ml 4.8mg / ml graphene aqueous dispersion at 25°C under stirring conditions (graphene uniform dispersion and nanofiber The mass ratio of the homogeneous dispersion liquid is 1:1), ultrasonication for 30 minutes, and stirring at room temperature for 60 minutes to obtain a uniformly mixed colloidal solution;

[0043] (2) The colloidal solution obtained in step (1) was washed by vacuum filtration to remove excess solvent, washed three times with deionized water, washed once with ethanol, and then vacuum-dried at 60°C for 12 hours to obtain nanocellulose / graphene ( CNC-G) composite flexible film.

[0044] (3) Add 0.5ml 0.12M HAuCl to the colloidal solution obtained in step (1) 4 Ethanol solution, stirred at room temperature for 60min to obtain an aqueous s...

Embodiment 2

[0051] The preparation of nanocellulose / graphene (CNC-G) composite flexible film specifically includes the following steps:

[0052] (1) Compositing of graphene and nanocellulose: 10ml of 19mg / ml nanocellulose aqueous solution and 8ml of 4.8mg / ml graphene aqueous dispersion were stirred and mixed at 40°C (uniform dispersion of graphene and nanocellulose were uniform The mass ratio of the dispersion liquid is 0.2:1), ultrasonication for 30 minutes, and stirring at room temperature for 60 minutes to obtain a uniformly mixed colloidal solution;

[0053] (2) The colloidal solution obtained in step (1) was washed by vacuum filtration to remove excess solvent, washed three times with deionized water, washed once with ethanol, and then vacuum-dried at 60°C for 12 hours to obtain nanocellulose / graphene (CNC-G) Composite flexible film.

[0054] The prepared nanocellulose / graphene (CNC-G) composite flexible film is colorful and transparent and exhibits good flexibility, and can be rest...

Embodiment 3

[0056] The preparation of nanocellulose / graphene (CNC-G) composite flexible film specifically includes the following steps:

[0057] (1) Compositing of graphene and nanocellulose: 1ml of 19mg / ml nanocellulose aqueous solution and 20ml of 4.8mg / ml graphene aqueous dispersion were mixed at 60°C (uniform dispersion of graphene and nanocellulose were uniform The mass ratio of the dispersion liquid is 5:1), ultrasonication for 30 minutes, and stirring at room temperature for 60 minutes to obtain a uniformly mixed colloidal solution;

[0058] (2) The colloidal solution obtained in step (1) was washed by vacuum filtration to remove excess solvent, washed three times with deionized water, washed once with ethanol, and then vacuum-dried at 60°C for 12 hours to obtain nanocellulose / graphene (CNC-G) Composite flexible film.

[0059] The prepared nanocellulose / graphene (CNC-G) composite flexible film is black and opaque, and the film is thicker, but the flexibility can still be maintaine...

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Abstract

The invention discloses a nanocellulose / graphene composite flexible thin film as well as a preparation method and application thereof. According to the method disclosed by the invention, the surface of a graphene-shaped structure is uniformly coated with nanocellulose under the action of a hydrogen bond, Van der Waals force, a II-II bond and the like between a nanocellulose molecule and a graphenemolecule, so that a nanocellulose / graphene (CNC-G) composite flexible thin film with uniform distribution and a smooth surface is formed. The nanocellulose / graphene composite flexible thin film disclosed by the invention has good flexibility and transparency, can be uniformly dispersed in a solvent containing water and exists stably for a long time. The preparation method disclosed by the invention has the advantages of abundant raw material source, simple operation technology, low cost, greenness, environment friendliness, high efficiency and the like. The nanocellulose / graphene (CNC-G) composite flexible thin film disclosed by the invention has the advantages of high purity, uniformity in compounding and good composition structure and has a wide application prospect in the fields including flexible electronics, catalysis, electrochemistry and the like.

Description

technical field [0001] The invention relates to the field of preparation and catalytic application of thin film materials, in particular to a nanocellulose / graphene composite flexible thin film and its preparation method and application. Background technique [0002] Nanocellulose (NanoCelluloses) is a natural renewable resource with excellent mechanical properties, large specific surface area, high crystallinity, high hydrophilicity, high transparency, and low density. It is often used as a matrix material to prepare flexible energy storage devices. , flexible film carrier, etc. Because nanocellulose has the characteristics of easy film formation, gelation, modification, biocompatibility and excellent mechanical properties, it is the first choice for the preparation of functional thin film materials. Therefore, it is of great practical significance to develop a simple and efficient nanocellulose-based highly flexible film material and its preparation method. [0003] Grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L1/02C08K7/00C08K3/04B01J31/06B01J35/06B01J32/00
CPCC08J5/18B01J31/069C08K7/00C08K3/04C08J2301/02B01J35/59
Inventor 黄建林王俊中王亚萌林湘君张会念
Owner SOUTH CHINA UNIV OF TECH
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