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Carbon nanotube-water-soluble polymer composite flexible electric-heating film as well as preparation method and use thereof

A technology of water-soluble polymers and carbon nanotubes, applied in the direction of heating element materials, etc., can solve the problems of low human affinity, high density, overheating, etc., and achieve high human affinity, low working voltage, and low operating costs Effect

Active Publication Date: 2013-06-26
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional metal or semiconductor electrothermal materials are limited in use due to their disadvantages such as not easy to deform at room temperature, too small resistivity to easily lead to overheating, high density, low human affinity, or even harmful.

Method used

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  • Carbon nanotube-water-soluble polymer composite flexible electric-heating film as well as preparation method and use thereof
  • Carbon nanotube-water-soluble polymer composite flexible electric-heating film as well as preparation method and use thereof
  • Carbon nanotube-water-soluble polymer composite flexible electric-heating film as well as preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A carbon nanotube-waterborne polyurethane composite flexible electrothermal film with a carbon nanotube content of 16.7wt% was prepared and its electrothermal effect was studied: the concentration of the carbon nanotube dispersion modified by hydrolyzed maleic anhydride styrene copolymer (HSMA) was 3.3 6.42g of wt% solution, 4.0g of water-based polyurethane (WPU) emulsion with a solid content of 26.5%, stirred for 2.5h with a magnetic stirrer, after mixing evenly, remove the air bubbles under vacuum at room temperature for 20min, and finally placed In a polytetrafluoroethylene mold of ×60mm, the water solvent is removed, and the size is 60×60×0.3mm 3 Film, cutting and coating electrodes with silver glue, the electrode spacing is 30mm, the final size of the obtained film sample is 30×50×0.3mm 3 . Apply a voltage between the electrodes, use a thermocouple to measure the point temperature on the surface, and obtain the curve of temperature rise and time, as shown in the a...

Embodiment 2

[0047] A carbon nanotube-waterborne polyurethane composite flexible electrothermal film with a carbon nanotube content of 13.8wt% was prepared and its electrothermal effect was studied: the concentration of the carbon nanotube dispersion modified by hydrolyzed maleic anhydride styrene copolymer was 3.3wt%. 17.9g of solution, 14.0g of water-based polyurethane emulsion with a solid content of 26.5%, stirred with a magnetic stirrer for 2.5h, after mixing evenly, removed air bubbles under vacuum at room temperature for 20min, and finally placed in a polytetrafluoroethylene with a length and width of 210mm×60mm In the vinyl mold, the water solvent was removed, and the size was 210×60×0.3mm 3 Film, cutting and coating electrodes with silver glue, the electrode spacing is 50mm, the final size of the obtained film sample is 50×100×0.3mm 3 . Apply a voltage between the electrodes, use a thermocouple to measure the point temperature on the surface, and obtain a curve of temperature ris...

Embodiment 3

[0049] A carbon nanotube-waterborne polyurethane composite flexible electrothermal film with a carbon nanotube content of 13.8wt% was prepared and its electrothermal effect was studied: the concentration of the carbon nanotube dispersion modified by hydrolyzed maleic anhydride styrene copolymer was 3.3wt%. 17.9g of solution, 14.0g of water-based polyurethane emulsion with a solid content of 26.5%, stirred with a magnetic stirrer for 2.5h, after mixing evenly, removed air bubbles under vacuum at room temperature for 20min, and finally placed in a polytetrafluoroethylene with a length and width of 210mm×60mm In the vinyl mold, the water solvent was removed, and the size was 210×60×0.3mm 3 Film, cutting and coating electrodes with silver glue, the electrode spacing is 20mm, the final size of the obtained film sample is 20×5×0.3mm 3 , electrified heating research, obtained the temperature rise effect under different voltages as follows Figure 4 Shown, where the room temperature ...

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Abstract

The invention relates to a carbon nanotube-water-soluble polymer composite flexible electric-heating film and a preparation method thereof. The composite electric-heating film comprises a water-soluble polymer matrix and carbon nanotubes which are dispersed in the water-soluble polymer matrix. The carbon nanotubes are dispersed in the water-soluble polymer matrix to form a plurality of conductive networks. The composite electric-heating film has good flexibility, environment-friendliness and human affinity. The preparation method can be used for preparing the electric heating film with the carbon nanometer tube content between 0wt% and 95wt% (not including 0wt%), so that the heating power of the composite electric-heating film can be adjusted within a large range by adjusting the resistivity, and therefore, the composite electric-heating film can achieve a quick and stable heating-up effect when the voltage of a direct-current low-voltage power supply is generally lower than 24V and particularly lower than 12V; and moreover, the preparation method is simple in operation process, low in cost and suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to a flexible electrothermal film and a preparation method thereof, in particular to a carbon nanotube-polymer composite flexible electrothermal film and a preparation method thereof. The composite electrothermal film is prepared by using water-dispersed carbon nanotubes and a water-soluble polymer And get. Background technique [0002] Since the discovery of carbon nanotubes, they have been widely studied and applied for their excellent mechanical, thermal, electrical and other properties. Among them, using carbon nanotubes as additives to modify the properties of polymers is one of the research hotspots. In carbon nanotube polymer-based composite materials, there are mainly problems such as uneven dispersion of carbon nanotubes and low interfacial bonding ability between carbon nanotubes and polymer materials. In order to improve the dispersion of carbon nanotubes and the interfacial bonding performance of carbon nanotubes and...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/04C08K7/00C08K3/04H05B3/10
Inventor 曾志辉金灏张忠高锋
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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