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Preparation of gas sensor based on screen printing technique

A screen printing, humidity sensor technology, applied in printing, instruments, printing devices, etc., to achieve the effect of low production equipment and environmental requirements, low production cost, and low pollution

Inactive Publication Date: 2017-12-29
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a humidity sensor with low cost, simple preparation method, low detection limit, high sensitivity and good stability in view of the current existing problems.

Method used

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  • Preparation of gas sensor based on screen printing technique
  • Preparation of gas sensor based on screen printing technique
  • Preparation of gas sensor based on screen printing technique

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Experimental program
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Effect test

Embodiment Construction

[0017] 1. Firstly, nano-silver interdigitated electrodes are printed on an insulating substrate by screen printing technology. The specific steps are as follows (1) drawing electrodes and making a screen; (2) optimizing the ratio of nano-silver ink; (3) cleaning the screen printing machine with alcohol; (4) cleaning and drying the PET substrate to be printed with water and absolute ethanol; (5) Print silver finger electrodes.

[0018] 2. Synthesis of flaky CuO powder: the production process is as follows: (1) Take 5 g of copper sulfate and dissolve it in 100 ml of water with magnetic stirring to obtain a copper sulfate solution; (2) Dissolve 3.2 g of sodium hydroxide powder in 50 ml of After dissolving in water by magnetic stirring, a sodium hydroxide solution was obtained, and its pH was measured to be 12. (3) Slowly add the sodium hydroxide solution obtained in step (2) to the solution (1), heat and stir with a magnetic force, the temperature is controlled at 80°C, and afte...

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Abstract

A humidity sensor is used as a special gas sensor and has a wide use in the fields of environment, safety, meteorology and medical treatment. For better meeting and solving the needs and conventional problems of humidity sensors in application, the development of a sensor with high sensitivity, strong selectivity, high response speed and high stability attracts much attention. A copper oxide nanosheet (CuO), copper oxide nanosheet-multi-walled carbon nanotubes (CuO-MWCNTs) and a copper oxide nanosheet-graphene (CuO-Graphene) composite material are prepared by a simple in-situ oxidation-reduction method, the ratio of the materials, additives and a solvent is further regulated, a printing ink for silk-screen printing is prepared, double-layer overprinting is performed on a flexible polyethylene terephthalate thin film (PET) by a silk-screen printing machine, and the humidity sensor for humidity detection is printed out. The humidity sensor has the advantages of low detection limit, high sensitivity, good stability and the like and has a certain application prospect in the future practical application.

Description

technical field [0001] The present invention relates to a preparation method of a humidity sensor and the humidity sensor prepared by the preparation method, especially a kind of advantages such as simplified manufacturing procedures, low detection limit, high sensitivity and good stability, which can improve the safety of the process. In application, it has a certain application prospect. Background technique [0002] The amount of water vapor contained in the atmosphere is called humidity, and the humidity in the environment is closely related to people's daily life, industrial production, and the survival and growth of animals and plants. The capture and extraction of humidity information has been widely concerned by people. Different organisms, plants or things have different requirements for the humidity of their environment. In order to better enable all kinds of things to develop in the direction of human needs, it must be able to meet the adaptive humidity environm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00B41M1/12
CPCB41M1/12G01N27/00
Inventor 刘君潘鹏杨正春
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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