Water dispersible polyaniline/carbon nanotube composite resistive type film gas-sensitive element and preparation method thereof

A carbon nanotube composite, carbon nanotube technology, applied in the direction of material resistance, can solve the problems of limited research and practical application, poor processing performance of polyaniline, long recovery time, etc. low cost effect

Inactive Publication Date: 2013-08-07
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, polyaniline gas sensors also have their disadvantages, such as long recovery time, poor reversibility, and poor processability of polyaniline, which limit their further research and practical application.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 1 Clean the interdigitated gold electrodes and dry them for later use.

[0018] 2 Prepare an aqueous solution of polystyrene sulfonic acid, wherein the molecular weight of polystyrene sulfonic acid is 80000, and the concentration is 2 mg / mL. Ultrasonically disperse the carbon nanotubes in the above aqueous solution for 30 minutes, and then add the aniline monomer distilled under reduced pressure into the above mixed aqueous dispersion of polystyrene sulfonic acid and carbon nanotubes. Tube 100mg, aniline 15mL, stirred for 1h, A aqueous solution was obtained. Then add an aqueous ammonium persulfate solution with a concentration of 2.5mol / L, the volume ratio of the aqueous solution A to the aqueous ammonium persulfate solution is 100:1, stir and mix at 0-5°C for 8 hours to obtain a water-dispersed polyaniline / carbon nanotube composite material of aqueous solution.

[0019] 3. Spin-coat the aqueous solution of the polyaniline / carbon nanotube composite material in step 2)...

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PUM

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Abstract

The invention discloses a water dispersible polyaniline / carbon nanotube composite resistive type film gas-sensitive element and preparation method thereof, and the product is prepared by coating a layer of water dispersible polyaniline / carbon nanotube composite sensitive film on an interdigital gold electrode. The gas sensitive film is composed of polyaniline and carbon nanotube compound. The method has the advantages of simple preparation technology and mild condition, and the product is suitable for batch production. The prepared gas-sensitive element has the advantages of wide measurement scope of ammonia gas, high response sensitivity, good restorability, good linearity, room temperature detection, etc., and can be widely applied to room temperature accurate measurement of ammonia gas concentration in the industrial and agricultural production process and atmosphere environment.

Description

technical field [0001] The invention relates to a water-dispersed polyaniline / carbon nanotube composite resistive film gas sensor and a preparation method thereof. Background technique [0002] In recent years, the research and development of gas sensors has become more and more important due to the increasing requirements for the accuracy, performance and stability of gas sensors in the fields of industrial production, home security, environmental monitoring and medical treatment. With the application of advanced science and technology, the development trend of gas sensors is miniaturization, intelligence and multi-function. Because organic polymer sensitive materials have the advantages of abundant materials, low cost, simple film-making process, easy compatibility with other technologies, work at room temperature, and can develop towards miniaturization and miniaturization, it has become a research hotspot and has attracted the attention of scientists from all over the wo...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 黄晶罗静姜思思赵伟刘仁刘晓亚
Owner JIANGNAN UNIV
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