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Polyelectrolyte / intrinsic conducting polymer composite humidity sensor and its production method

A technology of composite humidity sensor and polyelectrolyte, which is applied in the field of polyelectrolyte/intrinsically conductive polymer composite humidity sensor, can solve the problems of low ion mobility, excessive resistance value, hindering development, etc., and achieve good response linearity , improve consistency, and improve stability

Inactive Publication Date: 2007-11-28
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymer resistive humidity sensor made of traditional polymer humidity-sensitive materials relies on pure ion conduction, the ion mobility is low at low humidity, and the resistance value is too large to be measured, which seriously hinders its development.

Method used

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  • Polyelectrolyte / intrinsic conducting polymer composite humidity sensor and its production method
  • Polyelectrolyte / intrinsic conducting polymer composite humidity sensor and its production method
  • Polyelectrolyte / intrinsic conducting polymer composite humidity sensor and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Soak and clean the glass-ceramics substrate with interdigitated gold electrodes on the surface photoetched and evaporated with absolute ethanol and acetone, and dry for later use;

[0031] 2) Dissolve poly 4-vinylpyridine and 1,4-dibromobutane in N,N-dimethylformamide, the 4-vinylpyridine unit in the polymer and 1,4-dibromobutane The molar ratio of the solution is 1:0.5, prepared into a solution with a polymer concentration of 10 mg / ml, and placed at 30° C. for 4 hours to obtain a precursor solution;

[0032] 3) Use a dipping machine to immerse the glass-ceramic interdigitated gold electrode in step 1) in the precursor solution for 0.5 minutes, pull it out, cross-link and quaternize it at 80°C for 12 hours, and place it on the glass-ceramic interdigitated gold electrode A polyelectrolyte basement membrane is formed on the surface;

[0033] 4) Ammonium persulfate and 4-methylbenzenesulfonic acid were dissolved in deionized water, the mass ratio of ammonium persulfate...

Embodiment 2

[0036] 1) Electrode cleaning is the same as in Example 1;

[0037] 2) Dissolve poly 4-vinylpyridine and 1,4-dibromobutane in N,N-dimethylformamide, the 4-vinylpyridine unit in the polymer and 1,4-dibromobutane The molar ratio is 1:2, and it is prepared into a solution with a polymer concentration of 30 mg / ml, and placed at 30° C. for 12 hours to obtain a precursor solution;

[0038] 3) Use a dipping machine to immerse the glass-ceramic interdigitated gold electrode in step 1) in the precursor solution for 2 minutes, pull it out, cross-link and quaternize it at 140°C for 2 hours, and coat the glass-ceramic interdigitated gold electrode A polyelectrolyte basement membrane is formed on the surface;

[0039] 4) Ammonium persulfate and 4-methylbenzenesulfonic acid were dissolved in deionized water, the mass ratio of ammonium persulfate and 4-methylbenzenesulfonic acid was 1:3, and the concentration of ammonium persulfate was 4 mg / ml, to obtain Solution A;

[0040] 5) Use a dippi...

Embodiment 3

[0042] 1) Electrode cleaning is the same as in Example 1;

[0043] 2) Dissolve poly 4-vinylpyridine and 1,4-dibromobutane in N,N-dimethylformamide, the 4-vinylpyridine unit in the polymer and 1,4-dibromobutane The molar ratio is 1:1, prepared into a solution with a polymer concentration of 24 mg / ml, and placed at 30° C. for 12 hours to obtain an electrolyte precursor solution;

[0044] 3) Use a dipping machine to immerse the glass-ceramic interdigitated gold electrode in step 1) in the precursor solution for 1 minute, pull it out, cross-link and quaternize it at 110°C for 10 hours, and coat the glass-ceramic interdigitated gold electrode A polyelectrolyte basement membrane is formed on the surface;

[0045] 4) Dissolving ammonium persulfate and 4-methylbenzenesulfonic acid in deionized water, the mass ratio of ammonium persulfate and 4-methylbenzenesulfonic acid is 1:2, the concentration of ammonium persulfate is 1.5 mg / ml, Obtain solution A;

[0046] 5) Use a dipping machine...

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Abstract

The invention discloses a humidity sensor of combination of polyelectrolyte and intrinsic conducting polymer and the fabricating method. It adopts glass ceramic as substrate and multiple pairs of interdigital golden electrodes are set on it. Humidity film of combination of poly 4-vinypyridine with cross-linking quaternary amination and polypyrole is coated on surface of glass ceramic and interdigital golden electrode. The invention is provided with simple preparing process and low cost. It is suitable for mass production especially. Prepared humidity sensors are all provided with moderate resistance, high sensitivity, good linearity, quick response, good recurrence, strong stability and measuring in room temperature so on in wide humidity range, especially in circumstance with middle-low humidity (0-60%). It can be applied in production process of industry and agriculture, storage and accurate measurement and control for circumstance humidity when air circumstance is monitored.

Description

technical field [0001] The invention relates to a polyelectrolyte / intrinsically conductive polymer composite moisture sensitive element and a manufacturing method thereof. Background technique [0002] Accurate measurement of humidity plays an important role in industrial and agricultural production and environmental monitoring, which provides a broad space for the development of humidity sensors. The polymer material humidity sensor has developed very rapidly in recent years. Compared with the traditional ceramic material humidity sensor, it has good response characteristics, wide measurement range, good stability, room temperature detection, easy integration, miniaturized mass production, and low price. features. Among them, the polymer resistive humidity sensor is well compatible with the current integrated circuit technology and is easy to integrate into the system to realize humidity measurement and control. Now it has become one of the important directions for the dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12
Inventor 李扬洪利杰杨慕杰
Owner ZHEJIANG UNIV
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