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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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  • Summary
  • 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 relatively high viscosity, which is not conducive to the dispersion of carbon nanotubes
In addition, although the dispersion can be improved through chemical functional modification, it will also greatly increase the cost of carbon nanotubes

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

Experimental program
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Embodiment 1

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

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

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

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

[0064] Step 2: Mix the nanocellulose dispersion, carbon nanotube dispersion and graphene dispersion according to the ratio, then add a certain proportion of high molecular conductive polymer, after high-speed dispersion for 10 minutes, use 1000W ...

Embodiment 2

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

Embodiment 3

[0075] The difference with Example 1 is: the proportion of nanocellulose dry weight: 70%, the proportion of carbon nanotubes, graphene and high molecular conductive polymer: 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 nanotubes, 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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