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Flexible CO room temperature sensor and preparation method thereof

A sensor and room temperature technology, applied in the field of gas sensing, can solve the problems of complex preparation process, insufficient sensitivity, high cost, etc., and achieve the effects of uniform diameter distribution, high gas detection sensitivity, and controllable composition

Inactive Publication Date: 2016-10-05
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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Problems solved by technology

However, the film-state polyaniline sensors prepared at this stage are not sensitive enough, and generally detect gases at the ppm level; in other tests using micro-nano devices, lower concentrations of gases can be detected, but are limited by their complex preparation processes and high cost

Method used

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  • Flexible CO room temperature sensor and preparation method thereof
  • Flexible CO room temperature sensor and preparation method thereof
  • Flexible CO room temperature sensor and preparation method thereof

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Embodiment Construction

[0038] In view of many defects in the prior art, the inventor of this case was able to propose the technical solution of the present invention after long-term research and extensive practice. The technical solution, its implementation process and principle of the present invention will be further explained in conjunction with several embodiments and accompanying drawings as follows.

[0039] see figure 1 , in a typical embodiment of the present invention, a kind of preparation process of the flexible CO room temperature sensor based on polyaniline nanofiber film can comprise the following steps:

[0040] (1) Preparation of nanofiber membrane template: the template polymer is uniformly dispersed in a solvent, and the corresponding nanofiber membrane is obtained by electrospinning;

[0041] (2) Preparation of polyaniline-coated nanofiber membrane: soak the nanofiber membrane template in a solution containing aniline and acid, and then add an oxidant under low temperature condit...

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Abstract

The invention discloses a flexible CO room temperature sensor which includes a polyaniline fiber film which is mainly formed by coating a nano fiber thin film with polyaniline. The polyaniline fiber film is electrically connected to an electrode. The invention also discloses a preparation method of the flexible CO room temperature sensor. The method includes the steps of: soaking the nano fiber thin film in a solution containing aniline and an acid, adding an oxidizing agent to polymerize the aniline and coat the nano fiber thin film with polyaniline to obtain a flexible polyaniline fiber film; and electrically connecting the polyaniline fiber film to the electrode to form the flexible CO room temperature sensor. The flexible CO room temperature sensor has simple structure, high sensitivity, wide detection range and high detection speed. The flexible fiber film can be combined with substrates in different materials easily. The sensor is simple in preparation method, is low in cost and is suitable for large-scale production and application.

Description

technical field [0001] The invention relates to a gas sensor, in particular to a flexible CO room temperature sensor and a preparation method thereof, belonging to the technical field of gas sensing. Background technique [0002] CO is a common toxic gas, which mainly comes from the incomplete combustion of fossil fuels and the emission of gas tail gas. CO has great harm to human health. People's sense of smell cannot determine its concentration. Therefore, the detection of CO necessary. At the same time, CO gas is a neutral molecule, and it is difficult for general sensing materials to generate detectable signals with it. Currently, only materials doped with noble metals can effectively detect CO gas. Therefore, the detection of CO has also attracted people's attention. [0003] As far as the current research on sensing materials is concerned, metal oxides are the most researched category, but metal oxide materials are only active at high temperatures, have low sensitivit...

Claims

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Application Information

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IPC IPC(8): G01N27/04
Inventor 陈韦赵晶晶胡颖
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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