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Manufacturing method of polyaniline composite nano fiber membrane optical sensor and detection method thereof

A composite nanofiber and optical sensor technology, applied in the field of optical sensors, can solve the problems of poor processing performance of polyaniline sensing film materials, complex sensing and detection process, low mechanical strength, etc., to achieve accurate measurement and uniform color rendering , The effect of increasing the specific surface area

Inactive Publication Date: 2011-02-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation and detection method of a polyaniline composite nanofiber membrane optical sensor, to solve the above-mentioned polyaniline sensing membrane material with poor processing performance, low mechanical strength, poor color rendering, and complicated sensing and detection process , issues such as low sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] At room temperature of 25°C, 0.02g of polyaniline (molecular weight: 65,000) was stirred and dissolved in 9.93g of formic acid and acetic acid mixed solvent (weight ratio: 5:1) in a stirred tank at a speed of 50rpm. After the polyaniline was completely dissolved, the Add 0.05 g of polyacrylamide (molecular weight: 2,000,000) to the solution, and stir at a rotation speed of 200 rpm to obtain a blended spinning solution with a mass fraction of polyaniline of 0.2% and a mass fraction of polyacrylamide of 0.5%. Under the conditions of room temperature 25°C and humidity 30%, the blended spinning solution solution was input to the spinneret at a flow rate of 1.5mL / h, and at the same time, the spinneret was connected to a 20kV power supply for electrospinning to prepare polyaniline / polypropylene Amide blended nanofibers; the receiving device is ITO conductive glass, and the distance between the conductive glass and the spinneret is 10cm; after the spinning is completed, put the...

Embodiment 2

[0024] At room temperature of 25°C, dissolve 0.5g of polyaniline (molecular weight: 65,000) in 8.5g of formic acid in a stirred tank at a speed of 100rpm. After the polyaniline is completely dissolved, add 1g of ethyl cellulose (molecular weight: 200,000) to the solution , and stirred at a rotational speed of 400 rpm to obtain a blended spinning solution with a mass fraction of polyaniline of 5% and a mass fraction of ethyl cellulose of 10%. Under the conditions of room temperature 25°C and humidity 42%, the blended spinning solution was input to the spinneret at a flow rate of 1.2mL / h, and at the same time, the spinneret was connected to an 18kV power supply for electrospinning to prepare polyaniline / ethyl fibers The receiving device is ITO conductive glass, and the distance between the conductive glass and the spinneret is 15cm; after the spinning is completed, the ITO conductive glass is dried in a vacuum oven at 25°C for 4 hours, and then immersed in 1mol / L of hydrazine h...

Embodiment 3

[0027] At room temperature of 25°C, 1.5g of polyaniline (molecular weight: 65,000) was stirred and dissolved in 7g of formic acid and acetic acid mixed solvent (mass ratio: 10:1) in a stirred tank at a speed of 200rpm. 1.5 g of nylon 6 (molecular weight: 180,000) was added to the mixture, and stirred at a rotation speed of 500 rpm to obtain a blended spinning solution with a mass fraction of polyaniline of 15% and a mass fraction of nylon 6 of 15%. Under the conditions of room temperature 25°C and humidity 33%, the blended spinning solution was input to the spinneret at a flow rate of 0.4mL / h, and at the same time, the spinneret was connected to a 30kV power supply for electrospinning to prepare polyaniline / nylon 6 co- Mix nanofibers; the receiving device is ITO conductive glass, and the distance between the conductive glass and the spinneret is 16cm; after the spinning is completed, put the ITO conductive glass in a vacuum oven to dry at 25°C for 4 hours, and then immerse in 1...

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Abstract

The invention relates to a manufacturing method of polyaniline composite nano fiber membrane optical sensor and a detection method thereof. The manufacturing method includes: eigenstate polyaniline raw material is dissolved; blending polymer is added into polyaniline solution; the solution is subject to electrostatic spinning, so as to prepare nano composite fiber; the nano composite fiber is deposited onto ITO conductive glass, so as to obtain conductive glass deposited with polyaniline composite fiber membrane, namely the polyaniline composite nano fiber membrane optical sensor. The detection method includes that the polyaniline composite nano fiber membrane optical sensor is placed into solution or gas sample containing substance to be detected, and standing and vacuum drying are carried out; a spectral measuring system is utilized to detect reflection and absorption spectrums thereof, Lab colour mode and RGB colour mode are adopted to calculate colour variation value, and the concentration of the detected substance is obtained. The invention has the advantages that equipment is simple, cost is low, no pre-treatment is required to be carried out on sample, detection range is wide, detection sensitivity is high, and real-time detection can be carried out.

Description

technical field [0001] The invention relates to a preparation and detection method of a polyaniline composite nanofiber membrane optical sensor, belonging to the technical field of optical sensors. Background technique [0002] Among many conductive polymers, polyaniline has attracted extensive attention due to its advantages such as easy availability of raw materials, simple synthesis, high temperature resistance, and good oxidation resistance. It is currently recognized as one of the most promising conductive polymer materials. In addition to outstanding electrical properties, polyaniline also has a unique doping mechanism, excellent physical and chemical properties, good light and thermal stability, especially under different oxidation potential fields and pH environments, a series of color changes can occur , making polyaniline gradually gaining attention in the field of optical material research. Optical sensor is a new type of sensor that responds to the detected subs...

Claims

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Application Information

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IPC IPC(8): D01D1/06C03C17/28C08L79/02D01D1/02D01F8/16G01N21/78D01D5/00
Inventor 丁彬斯阳俞建勇孙刚
Owner DONGHUA UNIV
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