Fabrication method of polymer resistive humidity sensor with hyperbranched structure

A technology of a humidity sensitive element and a manufacturing method, applied in the direction of material resistance, etc., can solve the problems of difficulty in measuring low-humidity environment, difficulty in measuring high resistance, difficulty in ion migration, etc., and achieve the advantages of cheap raw materials, improved contact, and improved ionic conductivity. Effect

Inactive Publication Date: 2011-12-21
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of sensor mostly uses traditional linear polymer electrolytes as sensitive materials. Due to the difficulty of ion migration and low conductivity in low-humidity environments, their resistance is too high and difficult to measure, which brings great difficulties to their measurement of low-humidity environments. , and to a certain extent hindered its further promotion and application

Method used

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  • Fabrication method of polymer resistive humidity sensor with hyperbranched structure
  • Fabrication method of polymer resistive humidity sensor with hyperbranched structure
  • Fabrication method of polymer resistive humidity sensor with hyperbranched structure

Examples

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Effect test

Embodiment 1

[0031] 1) cleaning the surface photolithography and evaporating the ceramic substrate with interdigitated gold electrodes, and drying for later use;

[0032] 2) In the 100 ml three-necked flask after dehydration and deoxygenation treatment, add 10 grams of hyperbranched compound H O with structure (I), 10 grams of succinic anhydride, 0.2 grams of SnCl 2 , 30 ml of dioxane, argon for 30 minutes, then heated up to 120 ° C, stirred and reacted for 36 hours under the protection of argon to obtain a transparent viscous liquid, named H2O-COOH.

[0033] 3) Add 20 grams of 3-dimethylamino-1-propanol, 30 grams of n-bromobutane, and 80 milliliters of acetone to the 250 milliliter three-necked flask after dehydration and deoxygenation treatment, stir well, and pass argon for 30 Minutes, then heated to 40°C, stirred and reacted for 36 hours under argon protection, a large amount of white precipitate was obtained, vacuum filtered, washed several times with acetone, vacuum dried overnight a...

Embodiment 2

[0037] 1) cleaning the surface photolithography and evaporating the ceramic substrate with interdigitated gold electrodes, and drying for later use;

[0038] 2) In the 100 ml three-necked flask after dehydration and deoxygenation treatment, add 12 grams of hyperbranched compound H O with structure (I), 12 grams of succinic anhydride, 0.24 grams of SnCl 2 , 30 ml of dioxane, argon for 30 minutes, then heated up to 120 ° C, stirred and reacted for 36 hours under the protection of argon to obtain a transparent viscous liquid, named H2O-COOH.

[0039] 3) Add 26 grams of 3-dimethylamino-1-propanol, 34 grams of n-bromobutane, and 80 milliliters of acetone in the 250 milliliter three-neck flask after dehydration and deoxygenation treatment, stir well, and pass argon gas for 30 Minutes, then heated to 40°C, stirred and reacted for 36 hours under argon protection, a large amount of white precipitate was obtained, vacuum filtered, washed several times with acetone, vacuum dried overnigh...

Embodiment 3

[0043] 1) cleaning the surface photolithography and evaporating the ceramic substrate with interdigitated gold electrodes, and drying for later use;

[0044] 2) In the 100 ml three-necked flask after dehydration and deoxygenation treatment, add 20 grams of hyperbranched compound H O with structure (I), 20 grams of succinic anhydride, 0.4 grams of SnCl 2 , 60 ml of dioxane, argon for 30 minutes, then heated up to 120 ° C, stirred and reacted for 48 hours under the protection of argon to obtain a transparent viscous liquid, named H2O-COOH.

[0045] 3) Add 30 grams of 3-dimethylamino-1-propanol, 40 grams of n-bromobutane, and 100 milliliters of acetone to the 250 milliliter three-neck flask after dehydration and deoxygenation treatment, stir well, and pass argon for 30 Minutes, then raised the temperature to 60°C, stirred and reacted for 36 hours under the protection of argon, and obtained a large amount of white precipitate, which was vacuum filtered, washed several times with a...

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Abstract

The invention discloses a polymer resistance type humidity sensitive element with a hyperbranched structure and a manufacturing method thereof. It uses ceramics as the substrate, on which there are multiple pairs of interdigitated gold electrodes, and the surface of the ceramic substrate and the interdigitated gold electrodes is coated with a high molecular weight quaternary ammonium salt moisture-sensitive film with a hyperbranched structure. The humidity sensor has the characteristics of moderate impedance value, high sensitivity, good linearity, fast response, good recovery, strong stability, and detection at room temperature in a wide range of humidity, especially in a low humidity environment. Widely used in industrial and agricultural production processes, storage, atmospheric environment monitoring for accurate measurement and control of environmental humidity.

Description

technical field [0001] The invention relates to a polymer resistance type humidity sensitive element with a hyperbranched structure and a manufacturing method thereof. Background technique [0002] Humidity plays a very important role in human production and life, and humidity sensor is the most common and effective method to detect humidity. Currently commercialized humidity sensors mainly include inorganic ceramic semiconductor type and organic polymer type. The polymer humidity sensor has become the mainstream of the humidity sensor because of its good response characteristics, wide measurement range, good stability, room temperature detection, easy integration, miniaturized mass production, and low price. Among them, the polymer resistive humidity sensor is very simple to prepare, has good performance, and is easy to integrate into the system to realize the measurement and control of humidity, which is one of the focuses of the research and development of humidity senso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
Inventor 李扬李朋杨慕杰
Owner ZHEJIANG UNIV
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