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

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...