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A kind of humidity sensor based on halloysite nanotube and preparation method thereof

A technology of halloysite nanotubes and humidity sensors, which is applied in the direction of material impedance, can solve the problems of high performance and low cost, and achieve good response recovery characteristics, low energy consumption, and simple preparation methods.

Active Publication Date: 2021-12-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the defects that the above-mentioned existing humidity sensors usually cannot balance high performance and low cost, the present invention provides a humidity sensor based on halloysite nanotubes and its preparation method

Method used

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  • A kind of humidity sensor based on halloysite nanotube and preparation method thereof
  • A kind of humidity sensor based on halloysite nanotube and preparation method thereof
  • A kind of humidity sensor based on halloysite nanotube and preparation method thereof

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Embodiment 1

[0037] A humidity sensor based on halloysite nanotubes, comprising a substrate, the surface of the substrate contains interdigital electrodes, the substrate is coated with a humidity sensing layer, and the humidity sensing layer completely covers the interdigital electrodes , the humidity sensing layer is made of halloysite nanotubes and a solvent, the mass ratio of the halloysite nanotubes to the solvent is 1:1; the solvent is ethanol; the thickness of the humidity sensing layer The number of the interdigitated electrodes is 1 pair, and the interdigital distance of each pair of the interdigitated electrodes is 500 μm; the substrate is polyimide.

Embodiment 2

[0039] A humidity sensor based on halloysite nanotubes, comprising a substrate, the surface of the substrate contains interdigital electrodes, the substrate is coated with a humidity sensing layer, and the humidity sensing layer completely covers the interdigital electrodes , the humidity sensing layer is made of halloysite nanotubes and a solvent, the mass ratio of the halloysite nanotubes to the solvent is 1:3; the solvent is deionized water; the humidity sensing layer The thickness of the interdigitated electrode is 30 μm; the number of the interdigitated electrodes is 5 pairs, and the interdigital distance of each pair of the interdigitated electrodes is 150 μm; the substrate is aluminum oxide.

Embodiment 3

[0041] A humidity sensor based on halloysite nanotubes, comprising a substrate, the surface of the substrate contains interdigital electrodes, the substrate is coated with a humidity sensing layer, and the humidity sensing layer completely covers the interdigital electrodes , the humidity sensing layer is made of halloysite nanotubes and a solvent, the mass ratio of the halloysite nanotubes to the solvent is 1:10; the solvent is acetone; the thickness of the humidity sensing layer is 100 μm; the number of the interdigitated electrodes is 10 pairs, and the interdigital distance of each pair of the interdigitated electrodes is 50 μm; the substrate is paper.

[0042] In Embodiment 1-3, the substrate can also be one of silicon, polyetherimide or fabric;

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Abstract

The invention provides a humidity sensor based on halloysite nanotubes and a preparation method thereof, which belong to the technical field of humidity sensitive elements and preparation thereof. A humidity sensor based on halloysite nanotubes includes a substrate, and the substrate The surface contains interdigitated electrodes, the substrate is coated with a humidity sensing layer, the humidity sensing layer completely covers the interdigitated electrodes, and the humidity sensing layer is halloysite nanotubes. A humidity sensor based on halloysite nanotubes of the present application has a large humidity response, and the impedance change is 5 orders of magnitude; the detection range is wide, and the relative humidity in the range of 0%-91.5% can be detected; the response time is fast, no more than 1 second; it has the advantages of rich raw material resources, low cost, green environmental protection, and simple device preparation process, and has good practical application value.

Description

technical field [0001] The invention relates to the technical field of humidity sensitive elements and their preparation, in particular to a halloysite nanotube-based humidity sensor and a preparation method thereof. Background technique [0002] The development of humidity measurement technology has a history of more than 200 years. People's understanding of the humidity sensor began in 1938 when F.W.Dummore in the United States successfully developed the dip-coated LiCl humidity sensor. Since then, there have been dozens of humidity sensors and sensors. Came into being. [0003] Relative humidity is an important environmental parameter in household, industrial, agricultural and medical places. It is necessary to develop high-performance and low-cost humidity sensors to monitor it accurately. [0004] The humidity sensor refers to a device-type device that can convert humidity into an electrical output that is proportional to it. The main characteristic parameters are hum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/02
CPCG01N27/02
Inventor 太惠玲段再华蒋亚东赵秋妮黄琦谢光忠杜晓松
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA