Flexible sensor capable of detecting ammonia at normal temperature and preparation method thereof

A flexible sensor and normal temperature technology, applied in the field of ammonia sensor, can solve the problems of low selectivity, inflexibility, and insufficient sensitivity coefficient, and achieve the effects of avoiding environmental pollution, good adsorption, and easy integration

Inactive Publication Date: 2013-05-01
WUHAN TEXTILE UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Titanium doped with In 2 o 3 The ammonia sensor made of ceramics can be prepared at a temperature of 145°C, and the sensitivity coefficient is not high enough
The Chinese patent No. CN 102103103A published on June 22, 2011 is a sensor for detecting ammonia and its preparation method, which uses P-type organic semiconductor poly(3-alkyl)thiophene as poly(3-hexyl) Thiophene is the raw material of the functional layer, which is prepared by oxidation and vacuum evaporation, which takes a long time to prepare and requires a higher temperature, and a higher temperature

Method used

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  • Flexible sensor capable of detecting ammonia at normal temperature and preparation method thereof

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preparation example Construction

[0025] The preparation method comprises the following steps:

[0026] a Preparation of flexible sensor nano-silver layer two-electrode electrode 1

[0027]Select substrate photo paper 2, and use Dimatix Materials Printer-2800 inkjet printing device to spray-print nano-silver solution with a particle size of 40-82nm and a concentration of 1.10-2.60g / ml on the protective film containing photosensitive emulsion layer of photo paper 2 After several times of spray printing, a symmetrical two-electrode electrode 1 with a nano-silver layer is prepared. Finally, the thickness of the nano-silver layer is 8-30 microns. On the surface of the protective film containing the photosensitive emulsion layer of the photographic paper 2, inkjet prints nano The silver solution is mainly to improve the conductivity of the sensor.

[0028] Wherein, the nano-silver layer two-electrode type electrode 1 is 8-35 mm long and 2-15 mm wide, and the interval between the nano-silver layer two-electrode typ...

Embodiment 1

[0035] a Preparation of flexible sensor nano-silver layer two-electrode electrode

[0036] Select the substrate photo paper, and use the Dimatix Materials Printer-2800 inkjet printing device to print the nano-silver solution with a particle size of about 40nm and a concentration of 1.10g / ml on the surface of the protective film containing the photosensitive emulsion layer of the photo paper, choose 80 Dry at ℃ for 50 minutes to prepare a symmetrical nano-silver layer two-electrode electrode, the thickness of the nano-silver layer is about 8 microns;

[0037] Among them, the nano-silver layer two-electrode electrode is 8mm long and 2mm wide, and the interval between the nano-silver layer two-electrode electrodes is 1.0mm;

[0038] b Preparation of flexible sensor SWNTs-PABS functional layer

[0039] Dissolve the single-walled carbon nanotube particles modified by diethylpropynylamine formate in the deionized water system, and disperse them by high-frequency ultrasound at a fre...

Embodiment 2

[0044] a Preparation of flexible sensor nano-silver layer two-electrode electrode

[0045] Select the substrate photo paper, and use the Dimatix Materials Printer-2800 inkjet printing device to print the nano-silver solution with a particle size of about 60nm and a concentration of 1.50g / ml on the surface of the protective film containing the photosensitive emulsion layer of the photo paper, choose 70 Dry at ℃ for 10 minutes to prepare a symmetrical nano-silver layer two-electrode electrode, the thickness of the nano-silver layer is about 14 microns;

[0046] Among them, the nano-silver layer two-electrode electrode is 10mm long and 3mm wide, and the interval between the nano-silver layer two-electrode electrodes is 2.0mm;

[0047] b Preparation of flexible sensor SWNTs-PABS functional layer

[0048] Dissolve the single-walled carbon nanotube particles modified by diethylpropargylamine formate in the deionized water system, and disperse them by high-frequency ultrasound at a ...

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Abstract

The invention relates to an ammonia sensor, in particular to a flexible sensor capable of detecting ammonia at normal temperature and a preparation method thereof. The flexible sensor provided by the invention employs photographic paper as a substrate, and has the characteristics of being capable of optionally folding, cutting and bending; an nano-silver layer dual-electrode-type electrode and an SWNT-PABS functional layer are prepared through painting on the protective film surface, including the photosensitive emulsion layer, of the photographic paper by the inkjet printing method; as the PABS has the characteristic of being very sensitive to ammonia, ammonia can be detected at normal temperature; the detection concentration can be as low as 1 ppm, so that the flexible sensor has the characteristic of sensitivity; the flexible sensor can keep good stability after being used for four months; and the preparation method of the flexible sensor is simple in process, can be miniature in size, and is easy to integrate.

Description

technical field [0001] The invention relates to an ammonia gas sensor, in particular to a flexible sensor for detecting ammonia gas at normal temperature and a preparation method thereof. Background technique [0002] Ammonia is a colorless and highly toxic gas, which can cause great harm to human health at low concentrations. Ammonia detection is widely used in many fields such as industry, medicine, refrigeration, agriculture, atmospheric detection, and national defense. . The ammonia gas sensor uses a substance that is highly sensitive to ammonia. A small change in the amount of ammonia will cause a large change in some physical or chemical properties of the substance (resistance, temperature, combustion point, optical properties, etc.). [0003] At present, the research and development of gas sensors is relatively rapid, and many methods have been used to prepare gas sensors, such as chemical vapor deposition (CVD), printing, coating, and electrospinning. However, the...

Claims

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Application Information

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IPC IPC(8): G01N27/12
Inventor 黄良辉徐卫林孟静王栋罗远芳陈克复
Owner WUHAN TEXTILE UNIV
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