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A kind of processing method of polyaniline response pH sensitive electrode

A technology of sensitive electrodes and processing methods, applied in the direction of electrochemical variables of materials, etc., can solve problems such as insolubility and infusibility, poor reversibility, research and application obstacles, etc.

Active Publication Date: 2020-05-12
HUIZHOU LEADAO ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the pH sensor made of polyaniline has high response sensitivity, the response time is long, the reversibility is not good, the pH response range is limited, and more importantly, it is generally insoluble and difficult to process, which is very difficult for its research and application. posed a great obstacle

Method used

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  • A kind of processing method of polyaniline response pH sensitive electrode
  • A kind of processing method of polyaniline response pH sensitive electrode
  • A kind of processing method of polyaniline response pH sensitive electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A method for processing a polyaniline-responsive pH-sensitive electrode, comprising the following specific steps:

[0028] S1. Add 0.1M ammonium persulfate to 0.05M aqueous aniline solution, keep warm at 4°C for 8 hours, and stir at a high speed of 150r / min to obtain nano-polyaniline particles;

[0029] S2. Disperse the nano-polyaniline particles in the polyacrylate solution at a concentration of 30% by volume, and mix them uniformly to obtain a pH-sensitive composition;

[0030] S3. Forming a pH-sensitive polymer film electrode by thermal curing.

[0031] Further, the thickness of the pH sensitive electrode is 60um.

[0032] Further, the thermal curing method is: spin-coating the obtained pH-sensitive composition on the surface of the glass plate; selectively exposing the pH-sensitive composition to chemical rays; a developing step of developing the exposed portion of the pH-sensitive composition; a washing step of washing the developing solution with a cleaning solu...

Embodiment 2

[0034] A processing method of the polyaniline-responsive pH-sensitive electrode comprises the following specific steps:

[0035] S1. In 0.2M aniline aqueous solution, add 0.2M ammonium persulfate, keep warm at 0°C for 8 hours, and stir at a high speed of 180r / min to obtain nano-polyaniline particles;

[0036] S2. Disperse the nano-polyaniline particles in the polyacrylate solution at a concentration of 50% by volume, and mix them uniformly to obtain a pH-sensitive composition;

[0037] S3. Forming a pH-sensitive polymer film electrode by thermal curing.

[0038] Further, the thickness of the pH sensitive electrode is 80um.

[0039]Further, the thermal curing method is: spin-coating the obtained pH-sensitive composition on the surface of the glass plate; selectively exposing the pH-sensitive composition to chemical rays; a developing step of developing the exposed portion of the pH-sensitive composition; a washing step of washing the developing solution with a cleaning soluti...

Embodiment 3

[0041] A processing method of the polyaniline-responsive pH-sensitive electrode comprises the following specific steps:

[0042] S1. Add 0.15M ammonium persulfate to 0.1M aqueous aniline solution, keep warm at 4°C for 8 hours, and stir at a high speed of 160r / min to obtain nano-polyaniline particles;

[0043] S2. Disperse the nano-polyaniline particles in the polyacrylate solution at a concentration of 40% by volume, and mix them uniformly to obtain a pH-sensitive composition;

[0044] S3. Curing by ultraviolet light to form a pH-sensitive polymer film electrode, the microstructure of which is as follows image 3 shown.

[0045] Further, the thickness of the pH sensitive electrode is 70um.

[0046] Further, the method of ultraviolet light curing is: spin-coat the obtained pH-sensitive composition on the surface of the glass plate, and perform infrared light irradiation and curing to obtain the base layer of the ultraviolet pH-sensitive electrode; uniformly coat or print on t...

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Abstract

The invention discloses a processing method of a polyaniline-responsive pH-sensitive electrode. The processing method disclosed by the invention has the advantages that polyaniline particles are formed in a solution as corresponding particles and are loaded in a high-molecular thin film, and a pH-value-responsive polymeric thin film is obtained by coating the film, has a large specific surface area and is favorable for detecting the diffusion and permeation of solution molecules, improving the sensitivity and increasing the response speed; the processing process is simple and environment-friendly, and the response sensitivity and resilience of a pH-sensitive element for pH of the solution can be adjusted by simply changing parameters such as the concentration of polyacrylate and the thickness of a thin-film electrode; and due to high mechanical stability and chemical stability of the thin-film electrode, the consistency to the response of the pH-sensitive element can be greatly improved, and the signal distortion caused by line resistance can be greatly reduced.

Description

technical field [0001] The invention relates to a processing method of a polyaniline-responsive pH sensitive electrode. Background technique [0002] As human beings pay more and more attention to their own health and the ecological environment, the demand for the sustainable development strategy of the national economy puts forward higher requirements for the monitoring and control of environmental pH. This provides opportunities and challenges for the research, development and production of pH sensors. [0003] Polymer pH sensors can realize room temperature detection, low energy consumption, and can develop towards miniaturization and miniaturization, which has attracted widespread attention and attention of scientists from all over the world. As a typical conductive polymer material, polyaniline is cheap, easy to synthesize, has high conductivity and reversible redox, doping and dedoping characteristics, and has a good potential application prospect in the field of pH s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/30C08L33/04C08L79/02C08G73/02
CPCC08G73/0266C08L33/04C08L2203/16C08L2203/20G01N27/30C08L79/02
Inventor 崔皓博黄兴桥
Owner HUIZHOU LEADAO ELECTRONICS MATERIAL