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Polypyrrole/polyvinylidene fluoride nano fiber composite resistance type film gas-sensitive element and manufacturing method thereof

A technology of polyvinylidene fluoride and nanofibers, which is applied in the direction of material analysis, instruments, and analysis materials through electromagnetic means, which can solve problems such as insufficient response sensitivity, poor reversibility, and application obstacles, and achieve high response sensitivity and easy regulation , the effect of improving stability

Inactive Publication Date: 2010-12-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its response sensitivity is not high enough, and its response is slow, and its reversibility is poor, especially for high-concentration ammonia gas, the response is irreversible, and even vacuum treatment or application of ultraviolet radiation is required to achieve the slow recovery of the response, which is for its Application is a big hurdle

Method used

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  • Polypyrrole/polyvinylidene fluoride nano fiber composite resistance type film gas-sensitive element and manufacturing method thereof
  • Polypyrrole/polyvinylidene fluoride nano fiber composite resistance type film gas-sensitive element and manufacturing method thereof
  • Polypyrrole/polyvinylidene fluoride nano fiber composite resistance type film gas-sensitive element and manufacturing method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1) Cleaning the surface photolithography and evaporating the ceramic substrate with interdigitated gold electrodes, drying for later use;

[0028] 2) Preparation of polyvinylidene fluoride nanofibers by electrospinning: N,N-dimethylacetamide containing polyvinylidene fluoride with a concentration of 0.1g / ml and iron trichloride with a concentration of 0.02g / ml The solution is packed in a syringe with a needle, the injection needle is connected to the positive pole of the high-voltage power supply, the negative pole of the high-voltage power supply is connected to the copper plate, and the interdigitated gold electrode with a ceramic substrate is placed on the copper plate; a 10kV power supply voltage is applied between the syringe needle and the copper plate, The distance between the needle and the copper plate is 10cm, and the solution in the syringe is extruded at a flow rate of 0.2ml / h by a syringe pump, and deposited on the interdigitated gold electrode and the surfa...

Embodiment 2

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

[0032]2) Preparation of polyvinylidene fluoride nanofibers by electrospinning: N,N-dimethylacetamide containing polyvinylidene fluoride with a concentration of 0.01g / ml and iron trichloride with a concentration of 0.005g / ml The solution is packed in a syringe with a needle, the injection needle is connected to the positive pole of the high-voltage power supply, the negative pole of the high-voltage power supply is connected to the copper plate, and the interdigitated gold electrode with a ceramic substrate is placed on the copper plate; a 20kV power supply voltage is applied between the needle of the syringe and the copper plate, The distance between the needle and the copper plate is 20cm, and the solution in the syringe is extruded at a flow rate of 1.0ml / h by a syringe pump, and deposited on the interdigitated gold electrode and t...

Embodiment 3

[0035] 1) Cleaning the surface photolithography and evaporating the ceramic substrate with interdigitated gold electrodes, drying for later use;

[0036] 2) Preparation of polyvinylidene fluoride nanofibers by electrospinning: N,N-dimethylacetamide containing polyvinylidene fluoride with a concentration of 0.2g / ml and iron trichloride with a concentration of 0.10g / ml The solution is contained in a syringe with a needle, the injection needle is connected to the positive pole of the high-voltage power supply, the negative pole of the high-voltage power supply is connected to the copper plate, and an interdigitated gold electrode with a ceramic substrate is placed on the copper plate; a 30kV power supply voltage is applied between the needle of the syringe and the copper plate, The distance between the needle and the copper plate is 8cm, and the solution in the syringe is extruded at a flow rate of 0.5ml / h by a syringe pump, and deposited on the interdigitated gold electrode and t...

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Abstract

The invention discloses a polypyrrole / polyvinylidene fluoride nano fiber composite resistance type film gas-sensitive element and a manufacturing method thereof. The method comprises the following steps of: depositing polyvinylidene fluoride nano fiber on a ceramic matrix electrode with golden interdigital by adopting an electrostatic spinning method, and then compounding polyaniline on the polyvinylidene fluoride nano fiber by gas phase in-situ polymerization to obtain a polypyrrole / polyvinylidene fluoride nano fiber composite gas-sensitive film. The preparation process is simple, has low cost, and is particularly suitable for batch production. The prepared gas-sensitive element has the advantages of high response sensitivity on ammonia gas at room temperature, good linearity and the like, has good response repeatability on high-concentration ammonia gas, and can be widely applied to room temperature on-line detection of ammonia gas concentration in an industrial and agricultural production process and an atmospheric environment.

Description

technical field [0001] The invention relates to a polypyrrole / polyvinylidene fluoride nanofiber composite resistance thin film gas sensor and a manufacturing method thereof. Background technique [0002] The research and application of chemical sensors is an important field in the development of science and technology in today's society. It plays a very important role in modern industrial and agricultural production and the detection and management of people's living environment. As a kind of important chemical sensor, gas sensor has been paid more and more attention and attention, and its development is very rapid at present. Among many sensing materials, conductive polymer gas-sensitive materials are easy to prepare, especially can be detected at room temperature, so they have intrinsic safety, are easy to prepare low-power components, and are conducive to long-term online monitoring. Favored. Electronic noses constructed of gas sensor arrays using conductive polymers as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/12C08L27/16C08L79/04
CPCG01N27/127
Inventor 李扬杨慕杰季善坐
Owner ZHEJIANG UNIV
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