Flexible conductive film with gas sensitivity performance and application thereof

A flexible conductive, gas-sensitive technology, applied to the conductive layer on the insulating carrier, organic material conductors, non-metallic conductors, etc., can solve problems such as limited applications, improve gas sensitivity, ensure food safety and human health, and facilitate Detection effect

Inactive Publication Date: 2019-04-19
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Inorganic nanomaterials are the earliest materials used in the field of gas sensing, but they require high temperature test conditions, which limits their application in flammable and explosive gas environments, highly integrated circuits, micro-nano devices, etc.

Method used

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  • Flexible conductive film with gas sensitivity performance and application thereof
  • Flexible conductive film with gas sensitivity performance and application thereof
  • Flexible conductive film with gas sensitivity performance and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Cut the PET film with a thickness of 0.1mm into a surface area of ​​0.49cm 2 3-4 mg of flake-shaped molybdenum trioxide is coated on it, the preferred size of molybdenum trioxide is 5-10 nm in thickness, 20-50 nm in width, and 3-5 μm in length, and the ratio of aniline to molybdenum trioxide is 1 :10, 1:3, 10:1 mixed, under the catalysis of ammonium persulfate in acidic solution, aniline is attached to the acidic active sites on the surface of molybdenum trioxide to polymerize to generate protonated polyaniline, and a flexible conductive film is obtained. The electron microscope images of the flexible conductive film are as follows: figure 2 Shown in Figures a, b, and c.

[0036] Gained flexible conductive film is tested the triethylamine concentration in the scope of 0ppm~100ppm at room temperature, and the minimum monitoring concentration of triethylamine is 0.5ppm and its response value is 1.2, and when 1ppm, response value is 2.8 (response value is flexible conduc...

Embodiment 2

[0038] Cut the PET film with a thickness of 0.1mm into a surface area of ​​0.49cm 2 0.5-1.5 mg of rod-shaped tungsten trioxide is coated on it. The preferred size of tungsten trioxide is 10-20 nm in diameter and 1.5-2 μm in length. Aniline and tungsten trioxide are mixed at a weight ratio of 1:2. Under the catalysis of ammonium persulfate, aniline adhered to the surface of tungsten trioxide and polymerized into protonated polyaniline to prepare a flexible conductive film.

[0039] Gained flexible conductive film is tested at room temperature to the response value of 100ppm triethylamine, ethylenediamine, ammonia, ethanol, acetone, test result is as follows Figure 4 .

Embodiment 3

[0041] Use a PET film with a thickness of 0.1mm and cut it into a surface area of ​​0.49cm 2 A square film of 0.5-1.5 mg, a hollow tubular tin oxide with a wall thickness of 1-10 nm and a length greater than 1 μm is coated on it, and pyrrole and tin oxide are mixed at a weight ratio of 1:2, and ammonium persulfate is mixed in an acidic solution. Under the catalysis, pyrrole is polymerized on the surface of hollow tubular tin oxide to form polypyrrole, and a flexible conductive film is prepared.

[0042] Gained flexible conductive film is tested ammonia gas concentration data at room temperature as Figure 5 , to monitor the change of ammonia concentration in the environment during the petrochemical production process by monitoring the change of the resistance of the flexible conductive film.

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Abstract

The invention discloses a flexible conductive film with gas sensitivity performance and application thereof and belongs to the technical field of gas sensing material preparation. The flexible conductive film is a composite film formed by stacking a two-dimensional nano material on a PET film substrate into a three-dimensional network structure, and attaching the conductive polymeric materia to the three-dimensional network structure. The two-dimensional nano material is one or more of molybdenum trioxide, tungsten trioxide, tricobalt tetroxide, tin oxide, and zinc oxide and is in the shape ofa slice, a bar, a needle, a wire or a hollow tube. The conductive polymeric material is protonated polyaniline, polypyrrole or polythiophene. According to the invention, the gas concentration of triethylamine, ethylenediamine, ammonia gas, ethanol, acetone and nitrogen dioxide at room temperature can be detected, and the high temperature monitoring defects of the inorganic nano material are overcome.

Description

technical field [0001] The invention belongs to the technical field of gas sensing material preparation, and in particular relates to a flexible conductive film with gas sensitive performance and its application. Background technique [0002] Environmental pollution and food safety are related to the vital interests of the public, so it is necessary to study gas sensing materials to monitor air quality and food quality. Inorganic nanomaterials are the earliest materials used in the field of gas sensing, but they require high temperature test conditions, which limits their applications in flammable and explosive gas environments, highly integrated circuits, and micro-nano devices. [0003] In industrial production, triethylamine and ammonia are poisonous and harmful gases released by petrochemical industry, which are harmful to human health. In terms of food, nitrogen-containing gases such as triethylamine, ethylenediamine, and ammonia will be released when meat, fish, shrim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B1/12G01N27/12
Inventor 赵彦弘熊玉华杨志民何微思
Owner GRIMAT ENG INST CO LTD
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