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A SnO2 composite carbon nanotube electrothermal film and a preparation method thereof

A carbon nanotube and electric heating film technology, applied in the field of SnO2 composite carbon nanotube electric heating film and its preparation, can solve the problems of high surface resistance of semiconductor electric heating film, inability to prepare high-temperature conductive film, and high cost of carbon-based electric heating film, and achieves increased The effect of large carrier concentration, strong chemical stability and excellent thermal efficiency

Inactive Publication Date: 2018-12-21
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The above-mentioned carbon-based electric heating film has high cost and low operating temperature; the preparation method of metal-based electric heating film is not suitable for industrial production; the surface resistance of semiconductor electric heating film is high, and the emissivity is low; Preparation of high-temperature conductive films

Method used

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  • A SnO2 composite carbon nanotube electrothermal film and a preparation method thereof
  • A SnO2 composite carbon nanotube electrothermal film and a preparation method thereof
  • A SnO2 composite carbon nanotube electrothermal film and a preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The present invention prepares SnO 2 The method for composite carbon nanotube electrothermal film comprises the following steps:

[0031] (1) Modified carbon nanotubes: Take 1g of carbon nanotubes, add them to 50ml of a mixture of concentrated nitric acid and concentrated sulfuric acid with a volume ratio of 3:1, mix them evenly, and put them in a constant temperature box. Treat at constant temperature for 1 hour, then continuously add deionized water and centrifuge to pH = 7, and dry in a constant temperature oven at 60°C to obtain modified carbon nanotubes;

[0032] (2) Preparation of electrothermal film precursor solution: weigh 21.0136g of SnCl 4 ·5H 2 O and 0.253 g of SbCl 3 Dissolve in 100ml of ethanol to make a mixed solution, in which SnCl 4 The concentration of the modified carbon nanotubes is 0.6mol / L; weigh 0.0021g of modified carbon nanotubes and add them to the mixed solution, first ultrasonically disperse for 5min, then stir on a magnetic stirrer for 1...

Embodiment 2

[0043] Design 4 groups of parallel experiments, basic steps are identical with embodiment 1, difference is the addition of carbon nanotube, it and SnCl 4 ·5H 2 The mass ratios of O are 0.00025:1, 0.0005:1, 0.00075:1 and 0.001:1, respectively.

[0044] The electrothermal film prepared in this embodiment was tested for performance, and the obtained results are shown in Table 2 below.

[0045] Table 2 Performance table of the electrothermal film prepared in Example 2

[0046]

[0047] It can be seen from Table 2 that the electrothermal film prepared by the present invention has the advantages of high thermal efficiency and good chemical stability, the sheet resistance is less than 140Ω / □, the emissivity reaches 0.9, and the electrothermal conversion efficiency is >90%, which can replace the traditional heating resistor and heating elements with poor thermal efficiency.

Embodiment 3

[0068] Design group parallel experiments, the basic steps are the same as in Example 1, the difference lies in the concentration of tin element in the electrothermal film precursor solution, respectively 0.1mol / L, 0.2mol / L, 0.4mol / L, 0.8mol / L and 1mol / L.

[0069] The electrothermal film prepared in Example 3 was tested for performance, and the obtained results are described in Table 5 below.

[0070] Table 5 Performance table of the electrothermal film prepared in Example 3

[0071]

[0072] It can be seen from Table 5 that when the concentration of tin element in the electrothermal film precursor solution is 0.2-0.8mol / L, the prepared electrothermal film has the advantages of high thermal efficiency, good chemical stability, etc., and the sheet resistance is less than 140Ω / □, and the emission The rate reaches 0.9, and the electrothermal conversion efficiency is >90%. If the concentration is low, lower than 0.2mol / L, the sample sprayed with the same solution will have les...

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Abstract

The invention discloses a SnO2 composite carbon nanotube electric heating film and a preparation method thereof. The electric heating film is a tetragonal rutile structure and comprises a carbon nanotube and SnO2 with a mass ratio of 0.0002 to 0.002 : 1; A manufacture method comprises adde tin salt and modifier into a solvent to prepare a mixed solution, SnO2 composite carbon nanotube electrothermal film was prepared by adding modified carbon nanotube and stirring evenly to obtain electrothermal film precursor solution, spraying the electrothermal film precursor solution onto the coated substrate, and then annealing the coated substrate at 470 - 570 DEG C for 10 - 20 min to obtain SnO2 composite carbon nanotube electrothermal film. The electric heating film of the invention has small resistance, high emissivity, excellent thermal efficiency and strong chemical stability, and can replace the existing heating element with poor thermal efficiency and heat resistance, and is energy-savingand environmentally friendly. At that same time, the manufacture method is simple, energy-saving and environment-friendly, and can be industrialized.

Description

technical field [0001] The invention belongs to the field of electrothermal film preparation, in particular to a SnO 2 Composite carbon nanotube electrothermal film and its preparation method. Background technique [0002] Electric heating film is divided into high temperature and low temperature electric heating film. High-temperature electric heating film is generally used in electronic appliances, military, etc., and now the electric heating film produced by science and technology; low-temperature electric heating film is a translucent polyester film that can generate heat after being energized. Heat pressed between insulating Mylar films. The principle of electric heating film heating is that under the action of an electric field, the carbon molecular clusters in the heating element produce "Brownian motion", and severe friction and impact occur between carbon molecules, and the heat energy generated is transmitted to the outside in the form of far-infrared radiation a...

Claims

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Application Information

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IPC IPC(8): H05B3/34H05B3/14
CPCH05B3/14H05B3/34
Inventor 李书亮童卫红吴其胜侯海军何寿成杨子润徐风广
Owner YANCHENG INST OF TECH
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