Quick-response carbon monoxide gas sensor and preparation process

Abstract

The invention discloses a quick-response carbon monoxide gas sensor and a preparation process, and relates to the technical field of semiconductor gas sensors. The quick-response carbon monoxide gas sensor comprises a bottom polyimide flexible substrate, a surface polyurethane coating, a high-precision silver electrode and a surface TrGO sensing material layer. By utilizing a printing electronic device technology, the thickness of a sensing coating is reduced to the minimum, the material cost and the physical volume of the device are reduced, and the sensitivity and the response / recovery time of the sensor are effectively improved; and the preparation process is based on a flexible electronic printing technology, and on the basis of a roll-to-roll printer, an extrusion crack type printing head and a letterpress printing head are used for blade coating of the printing head, so that the printing precision of the device is improved to the maximum extent, the size of the device is reduced, the appearance of the device is variable, and complete customization is realized.

Description

technical field [0001] The invention relates to the field of semiconductor gas sensors, in particular to a fast-response carbon monoxide gas sensor and a preparation process. Background technique [0002] Carbon monoxide is a colorless, odorless, non-irritating gas, usually produced by incomplete combustion of carbon-containing substances, or from the leakage of liquefied gas pipelines, industrial gas production and coal mining. Carbon monoxide is also a flammable gas. Explosive dangerous gas, the explosion limit of mixing with air is 12% to 75%. In addition, carbon monoxide binds to hemoglobin in blood, and its affinity is more than 200 times greater than that of oxygen and hemoglobin. When inhaling too much carbon monoxide in a short period of time , can lead to tissue hypoxia, produce toxic symptoms, and in severe cases can lead to serious damage to the nervous system or even death. Therefore, it is necessary to detect and monitor the concentration of carbon monoxide gas...

AI Technical Summary

Problems solved by technology

Therefore, the cost of using this method is high, the device volume is large, and there are certain requirements for working conditions

The traditional carbon monoxide gas sensor has low sensing performance, low signal strength (low sensitivity), slow signal response / recovery speed; and high energy consumption, which requires high temperature 200-400 degrees Celsius for sensing; short material life, high temperature conditions are significant Reduced lifespan of sensing materials and fixed physical shape, based on traditional silicon wafer semiconductor manufacturing technology, the appearance is hard, the device cannot be deformed and other defects, which cannot meet the needs of industrial production

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