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Preparation method for fast-response and wide-range ceramic-based nano-fiber humidity sensor

A humidity sensor and nanofiber technology, applied in nanotechnology, material resistance, etc., can solve the problem of long response recovery time, achieve high response recovery speed, increase the rate of radial transmission, and good repeatability

Inactive Publication Date: 2011-05-25
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the humidity sensors on the market are made of polymer materials as the sensitive layer. Although this kind of humidity sensor also has a wide working range, its response recovery time is relatively long, and the fastest is about 1 minute.

Method used

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  • Preparation method for fast-response and wide-range ceramic-based nano-fiber humidity sensor
  • Preparation method for fast-response and wide-range ceramic-based nano-fiber humidity sensor
  • Preparation method for fast-response and wide-range ceramic-based nano-fiber humidity sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In a 30ml Erlenmeyer flask, 1.0g of polyvinylpyrrolidone was added into 3ml of ethanol, and magnetically stirred at 25°C for 4 hours to completely dissolve it.

[0054] Another 30ml Erlenmeyer flask was taken, and 2ml of ethanol, 2ml of glacial acetic acid and 1g of tetrabutyl titanate were added in sequence, and magnetically stirred at 25°C for 20 minutes to make it evenly mixed.

[0055] Take another 30ml Erlenmeyer flask, add 0.75g of barium acetate into 1ml of deionized water, and stir until completely dissolved. Then add the dissolved barium solution into the mixed ester solution, and magnetically stir for 20 minutes at 25° C. to make the solution evenly mixed. Finally, add this mixed solution into the polymer solution, and continue magnetic stirring at 25°C for 20 minutes to make the solution evenly mixed;

[0056] The mixed solution is put into a plastic spinneret, the inner diameter of the plastic spinneret is 1mm, the copper wire is used as the anode, the alum...

Embodiment 2

[0058] In a 30ml Erlenmeyer flask, 1.0g of polyvinylpyrrolidone was added into 3ml of ethanol, and magnetically stirred at 25°C for 4 hours to completely dissolve it.

[0059] Another 30ml Erlenmeyer flask was taken, and 2ml of ethanol, 2ml of glacial acetic acid and 1g of tetrabutyl titanate were added in sequence, and magnetically stirred at 25°C for 20 minutes to make it evenly mixed.

[0060] Take another 30ml Erlenmeyer flask, add 0.75g of barium acetate into 1ml of deionized water, and stir until completely dissolved. Then add the dissolved barium solution into the mixed ester solution, and magnetically stir for 20 minutes at 25° C. to make the solution evenly mixed. Finally, add this mixed solution into the polymer solution, and continue magnetic stirring at 25°C for 20 minutes to make the solution evenly mixed;

[0061] The mixed solution is put into a plastic spinneret, the inner diameter of the plastic spinneret is 1mm, the copper wire is used as the anode, the alum...

Embodiment 3

[0063] In a 30ml Erlenmeyer flask, 1.0g of polyvinylpyrrolidone was added into 3ml of DMF, and magnetically stirred at 25°C for 4 hours to completely dissolve it.

[0064] Another 30ml Erlenmeyer flask was taken, and 2ml DMF, 2ml glacial acetic acid and 1g tetrabutyl titanate were added in sequence, and magnetically stirred at 25°C for 20 minutes to make it evenly mixed.

[0065] Take another 30ml Erlenmeyer flask, add 0.75g of barium acetate into 1ml of deionized water, and stir until completely dissolved. Then add the dissolved barium solution into the mixed ester solution, and magnetically stir for 20 minutes at 25° C. to make the solution evenly mixed. Finally, add this mixed solution into the polymer solution, and continue magnetic stirring at 25°C for 20 minutes to make the solution evenly mixed;

[0066] Put the mixed solution into a plastic spinneret. The inner diameter of the plastic spinneret is about 1mm. The copper wire is used as the anode, and the aluminum foil ...

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Abstract

The present invention belongs to the technical field of preparation of a humidity sensor, and particularly relates to a method for preparation of a fast-response and wide-range ceramic-based nano-fiber humidity sensor by adopting an electrospinning technique. Soluble metal salts, esters, conductive polymers and organic solvents are used as raw materials. The method comprises the following steps: preparing composite fibers containing the conductive polymers and composite metal oxide precursors by adopting the electrospinning technique, calcining the fibers to remove organic polymer components, and obtaining ceramic-based perovskite-type composite metal oxide nanofibers. The humidity sensor made with the one-dimensional, ultra-long and continuous perovskite-type composite metal oxide ceramic nanofibers has the advantages of wide range of humidity measurement, small humidity hysteresis, high linearity, rapid response and recovery and the like. The method is suitable for preparation of ceramic oxides and composite oxides with various soluble metal salts as the raw materials, has the advantages that the equipment has a simple structure, a good performance and a low cost, is easy to promote, can satisfy the requirements of industrial technologies, and is widely applied in such fields as the industry, agriculture, storage, meteorology and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of a ceramic-based perovskite-type composite metal oxide humidity sensor, and in particular relates to a method for preparing a fast-response and wide-range ceramic-based nanofiber humidity sensor by using electrospinning technology. Background technique [0002] In the environment we live in, the humidity or dryness of the air has a great impact on our life and work. The air is too humid or too dry will make us feel dull and suffocated. In industrial production, the humidity or dryness of the air has a great impact on The quality of the product will also have a big impact. Therefore, whether in the field of life or production, humidity sensors play a pivotal role. Most of the humidity sensors currently available on the market use polymer materials as the sensitive layer. Although this type of humidity sensor also has a wide working range, its response recovery time is relatively long, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12B82Y40/00
Inventor 张彤贺媛王蕊费腾王丽杰
Owner JILIN UNIV
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