Nanocellulose electrothermal film and preparation method thereof

A technology of nanocellulose and electric heating film, which is applied to electric heating devices, ohmic resistance heating, electrical components, etc., can solve the problems of changing the intrinsic properties of carbon nanotubes, unfavorable dispersion of carbon nanotubes, and increasing the cost of carbon nanotubes. The effect of protecting and enhancing the electrothermal film structure, good environmental compatibility, and improving the bonding performance

Active Publication Date: 2020-04-28
GUANGXI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods may change the intrinsic properties of carbon nanotubes and weaken their electrical conductivity.
Polymers usually require organic solvents, are difficult to degrade, pollute the environment, and have relative

Method used

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  • Nanocellulose electrothermal film and preparation method thereof
  • Nanocellulose electrothermal film and preparation method thereof
  • Nanocellulose electrothermal film and preparation method thereof

Examples

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[0059] Example 1

[0060] A preparation method of nanocellulose electric heating film, which specifically includes:

[0061] Step 1: Prepare a dispersion system with a concentration of 2 mg / ml nanocellulose dispersion, disperse the nanocellulose dispersion at high speed for 5 minutes, and then ultrasonically disperse the dispersion at a power of 600W for 25 minutes;

[0062] Prepare a carbon nanotube dispersion with a dispersion of 2 mg / ml, disperse the carbon nanotube dispersion at a high speed for 20 minutes, and then ultrasonically disperse it with a power of 600W for 20 minutes;

[0063] Prepare a graphene dispersion with a dispersion of 1 mg / ml, disperse the graphene dispersion at high speed for 5 minutes, and then disperse the graphene dispersion with 600W ultrasonic for 5 minutes;

[0064] Step 2: Mix the nanocellulose dispersion liquid, the carbon nanotube dispersion liquid and the graphene dispersion liquid according to the proportion, add a certain proportion of the...

Example Embodiment

[0072] Example 2

[0073] The difference from Example 1 is: in step 2, the proportion of dry weight of nanocellulose: 50%, the proportion of total dry weight of carbon nanotubes, graphene and high molecular conductive polymer: 50%; 3% of the total dry weight of carbon nanotubes, graphene and high-molecular conductive polymers; and the dry weight of high-molecular conductive polymers accounts for 2% of the total dry weight of carbon nanotubes, graphene and high-molecular conductive polymers. The high molecular conductive polymer is polyaniline.

Example Embodiment

[0074] Example 3

[0075] The difference from Example 1 is that the dry weight of nanocellulose accounts for 70%, the proportion of carbon nanotubes, graphene and high molecular conductive polymers: 30%; the dry weight of graphene accounts for carbon nanotubes, graphene and 4% of the total dry weight of the conductive polymer; the dry weight of the conductive polymer accounts for 3% of the total dry weight of the carbon nanotube, graphene and the conductive polymer. The high molecular conductive polymer is polypyrrole.

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Abstract

The invention provides a nanocellulose electrothermal film and a preparation method thereof. The electrothermal film is a composite film prepared by mixing nanocellulose, carbon nanotubes, graphene and a high-molecular conductive polymer. The electrodes are coated on the edges of the two sides of a composite film by using conductive silver adhesive, and then the composite film is subjected to dipping, cold prepressing and hot-pressing packaging by using packaging resin containing a thermochromic material to obtain the flexible nanocellulose electrothermal film. The electrothermal film providedby the invention has good electrothermal stability, uniformity, insulativity and waterproofness, has relatively low system resistance so as to realize low-voltage supply, also has a thermochromic function, can indicate temperature, and plays a role in early warning and prompting under a high-temperature condition.

Description

technical field [0001] The invention relates to the technical field of electrothermal functional materials, and more specifically, the invention relates to a nanocellulose electrothermal film and a preparation method thereof. Background technique [0002] At present, flexible electrothermal devices based on the Joule heating effect have attracted great attention in many fields such as micro-area temperature control, medical equipment, defogging and defrosting, smart textiles, and thermal analysis. There have been many studies on the use of carbon nanotubes (CNTs) and polymer resins to prepare electric heating films, such as preparing carbon nanotube-filled perfluoroalkoxy electric heating films by scraping; or using pre-mixing, post-dispersion, casting, thermal The carbon nanotube-epoxy composite electric heating film was prepared by curing and other processes, which has fast temperature response and electric heating efficiency. [0003] However, carbon nanotubes will cause...

Claims

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Application Information

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IPC IPC(8): C08L1/02C08L1/12C08L1/28C08L79/02C08L79/04C08L65/00C08K3/04C08J5/18H05B3/34H05B3/14
CPCC08J5/18H05B3/34H05B3/14C08J2301/02C08J2301/12C08J2301/28C08J2479/02C08J2479/04C08J2465/00C08K2201/011C08K3/041C08K3/042
Inventor 袁全平李心璞邹豪杰张彬霞邵闯题璞王梓宁卓兵
Owner GUANGXI UNIV
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