Preparation method of PAA/AgNPs composite flexible ammonia gas sensor

A kind of ammonia sensor, a flexible technology, applied in the direction of instruments, scientific instruments, metal processing equipment, etc., can solve the problems of expensive conductive organic matter, material toxicity, etc., and achieve industrial production, low production cost, and large-scale manufacturing Effect

Active Publication Date: 2019-04-16
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

The conductive organics that are now the focus of research mainly include poly(3,4-ethylenedioxythiophene):polystyrene sulfonate, polyaniline and polythiophene, among which poly(3,4-ethylenedioxythiophene):poly Styrene sulfonate and polythiophene are less responsive to ammonia, while polyaniline has a greater response to ammonia, but the material is toxic
In addition, these kinds of conductive organic compounds are relatively expensive

Method used

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  • Preparation method of PAA/AgNPs composite flexible ammonia gas sensor

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Embodiment 1

[0024] The preparation method of the PAA / AgNPs composite flexible ammonia sensor of embodiment 1 comprises the following steps:

[0025] (1) Prepare the polyimide flexible substrate, ultrasonically clean the flexible substrate with ethanol and acetone for 10 minutes, and then heat-treat at 80°C for 20 minutes;

[0026] (2) Inkjet printing silver conductive ink on a flexible substrate, and then heat treatment at 100°C for 10 minutes to prepare a silver interdigitated electrode layer on a flexible substrate;

[0027] (3) Weigh 3g of polyacrylic acid with a molecular weight of 5000 and 40g of diethanolamine into 50mL of deionized water, stir magnetically for 2 hours to obtain solution A; weigh 15g of silver nitrate into 20mL of deionized water, and ultrasonically shake for 5 minutes, then Slowly add dropwise into the stirring solution A to obtain solution B, then react at 30°C for 17 hours, and then react at 70°C for 6 hours to obtain solution C; then add 200mL of ethanol to solu...

Embodiment 2

[0031] The polyacrylic acid / silver particle composite material of embodiment 2 is the preparation method of the flexible ammonia sensor of base, comprises the following steps:

[0032] (1) Prepare a polyethylene terephthalate flexible substrate, ultrasonically clean the flexible substrate with ethanol and acetone for 10 minutes, and then heat-treat at 80°C for 10 minutes;

[0033] (2) Inkjet printing silver conductive ink on a flexible substrate, and then heat treatment at 100°C for 10 minutes to prepare a silver interdigitated electrode layer on a flexible substrate;

[0034] (3) Weigh 1g of polyacrylic acid with a molecular weight of 5000 and 8g of monoethanolamine into 50mL of deionized water, stir magnetically for 1 hour to obtain solution A; weigh 6g of silver acetate into 10mL of deionized water, and ultrasonically shake for 5 minutes, then Slowly add dropwise to the stirring solution A to obtain solution B, then react at 40°C for 10 hours to obtain solution C; then add ...

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Abstract

The invention discloses a preparation method of a PAA / AgNPs composite flexible ammonia gas sensor. The method is characterized in that a sensitive material is prepared into an ink form suitable for being printed by a common ink-jet printer, the thickness and the shape of a deposited ammonia sensitive material layer can be conveniently controlled through an ink-jet printing method, the ammonia gassensor with good performance is prepared, and the ammonia sensitive material can be deposited as required through the ink-jet printing mode, the waste of raw materials can be effectively reduced, themanufacturing cost of the sensor is reduced, meanwhile, the large-scale manufacturing of the sensor is facilitated, and the industrial production is facilitated. According to the method, the process is simple, the production cost is low, the prepared ammonia gas sensor has relatively good response to ammonia gas at different concentrations at room temperature, the detecting range is wide, the response time is short, the stability is high, the gas selectivity is good, the ammonia gas sensor is suitable for high-sensitivity detection of ammonia gas at room temperature, good in flexibility and low in working temperature and can be applied to detection of ammonia gas around a human body by combining a wearable device.

Description

technical field [0001] The invention relates to a method for preparing a gas sensor, in particular to a method for preparing a PAA / AgNPs composite flexible ammonia sensor, and belongs to the technical field of gas detection. Background technique [0002] Toxic and harmful gas detection is of great significance in industry, medical treatment, natural environment protection and daily life. With the rapid development of modern industry, people are more and more likely to be exposed to various volatile toxic and harmful gases in their daily life. Therefore, it is very meaningful to develop toxic gas detection technology. [0003] In the research on the detection technology of ammonia poisonous and harmful gases, in order to combine the development concept of wearable devices, conductive organic substances with the advantages of room temperature work, high sensitivity, good stability, and low cost have attracted the attention of researchers. The conductive organics that are now...

Claims

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Application Information

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IPC IPC(8): G01N27/12B22F9/24B22F1/00B22F1/02B82Y30/00
CPCG01N27/126G01N27/127B82Y30/00B22F9/24B22F2009/245B22F1/16B22F1/054
Inventor 宋伟杰吕大伍沈文锋彭明月谭瑞琴许炜
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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