Polymer compound resistor type humidity sensitive element with nanometer fiber structure and manufacturing method thereof

A technology of nanofibers and composite resistors, applied in electrical components, electrical solid devices, circuits, etc., can solve the problems of slow removal of water molecules, component sensitivity, response time limitation, etc., to reduce component resistance, fast response speed, and response sensitivity high effect

Inactive Publication Date: 2008-12-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, most of the moisture-sensitive materials of polymer-type humidity-sensitive elements exist in the form of dense films. Therefore, when the humidity-sensitive materials sense changes in the humidity of the external environment, water molecules absorb and diffuse into the sensitive film, and during the dehumidification process The removal of water molecules in the medium is relatively slow, which greatly limits the sensitivity and response time of the element

Method used

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  • Polymer compound resistor type humidity sensitive element with nanometer fiber structure and manufacturing method thereof
  • Polymer compound resistor type humidity sensitive element with nanometer fiber structure and manufacturing method thereof
  • Polymer compound resistor type humidity sensitive element with nanometer fiber structure and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Soak the photoetched and evaporated ceramic substrate with interdigitated gold electrodes in absolute ethanol and acetone, ultrasonically clean it, and dry it for later use;

[0029] 2) Immerse the interdigitated gold electrode of the ceramic substrate in an aqueous solution of polydiallyldimethylammonium chloride with a mass concentration of 0.25% with a dipping machine, pull it, take it out, and dry it in the air;

[0030] 3) The nanofiber composite film spun from the spinning solution was deposited on the ceramic interdigitated gold electrode coated with a modified film by electrospinning, and then heat-treated at 80°C for 16 hours to obtain a composite film with a nanofiber structure. Polymer composite resistive humidity sensor. The components of the spinning solution for electrospinning are calculated by weight percentage: 3-aminopropyl triethoxy silicon monobromo-n-hexane quaternary ammonium salt is 5.2%, polyethylene oxide is 5.2%, soluble basic polyaniline 0...

Embodiment 2

[0032] 1) Soak the photoetched and evaporated ceramic substrate with interdigitated gold electrodes in absolute ethanol and acetone, ultrasonically clean it, and dry it for later use;

[0033] 2) Immerse the ceramic interdigitated gold electrode in an aqueous solution of polydiallyldimethylammonium chloride with a mass concentration of 0.1% with a dipping machine, pull it, take it out, and dry it in the air;

[0034] 3) The nanofiber composite film spun from the spinning solution was deposited on the ceramic interdigitated gold electrode coated with a modified film by electrospinning, and then heat-treated at 100°C for 12 hours to obtain a composite film with a nanofiber structure. Polymer composite resistive humidity sensor. The components of the spinning solution for electrospinning are calculated by weight percentage: 6.1% for 3-aminopropyl triethoxy silicon monobromo-n-hexane quaternary ammonium salt, 6.1% for polyethylene oxide, soluble basic polyaniline 2.3%, and 2.3% o...

Embodiment 3

[0036] 1) Soak the photoetched and evaporated ceramic substrate with interdigitated gold electrodes in absolute ethanol and acetone, ultrasonically clean it, and dry it for later use;

[0037] 2) Immerse the ceramic interdigitated gold electrode in an aqueous solution of polydiallyldimethylammonium chloride with a mass concentration of 0.2% with a dipping machine, pull it, take it out, and dry it in the air;

[0038]3) The nanofiber composite film spun from the spinning solution was deposited on the ceramic interdigitated gold electrode coated with the modified film by electrospinning, and then heat-treated at 90°C for 14 hours to obtain a composite film with a nanofiber structure. Polymer composite resistive humidity sensor. The components of the spinning solution for electrospinning are calculated by weight percent: 3-aminopropyl triethoxy silicon monobromo-n-hexane quaternary ammonium salt is 5.6%, polyethylene oxide is 5.6%, soluble basic polyaniline 1.5%, and 1.5% of cam...

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Abstract

The invention discloses a polymer composite resistance-type humidity sensing element with a nanofiber structure and the preparation method thereof. The humidity sensing element adopts ceramics as a matrix, a plurality of pairs of interdigitated gold electrodes are arranged on the matrix, the surface of the ceramic matrix and the interdigitated gold electrodes are coated with poly (diallyldimethyl ammonium chloride) (PDDA) modifying film, and a poly-3-aminopropyl-triethoxysilane mono-brominated n-hexane quaternary ammonium salt, polyanion and polyoxyethylene composite nanofiber humidity sensing film with a cross-linked structure is settled on the modifying film. The humidity sensing film is in a good contact with an electrode substrate by means of the modifying film. The manufacturing method has the advantages of simple process and low cost. The prepared humidity sensing element has the characteristics of moderate impedance value in a wide humidity range, high sensitivity, good linearity, rapid response, good resilience, good stability, etc., and is widely applicable in precise measurement and control of ambient humidity in industrial and agricultural production process, storage, and atmospheric environment monitoring.

Description

technical field [0001] The invention relates to a polymer composite resistive humidity sensor with a nanofiber structure 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. Polymer humidity sensor is a type of humidity sensor that has developed very rapidly in recent years. Compared with traditional ceramic humidity sensors, it has good response characteristics, wide measurement range, good stability, room temperature detection, easy integration, and miniaturization. Mass production, low price and so on. Among them, the polymer resistive humidity sensor is well compatible with the current integrated circuit technology, easy to integrate in the system to realize humidity measurement and control, and the preparation is very simple, and has now become an important dir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12H01L49/00
CPCG01N27/127G01N27/121
Inventor 李扬李朋杨慕杰
Owner ZHEJIANG UNIV
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