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Ultralow-humidity visual detection material as well as preparation method and application thereof

A technology for detecting materials and low humidity. It is applied in the direction of analyzing materials through chemical reactions and analyzing materials through observing the impact on chemical indicators. It can solve problems such as the inability to achieve ultra-low humidity visual detection and achieve production costs. Low, easy-to-operate effect

Active Publication Date: 2022-05-03
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the response thresholds of the above-mentioned visual humidity detection materials to humidity are all above 2500ppm, and the visual detection of ultra-low humidity below 250ppm (relative humidity 1%RH) cannot be realized.

Method used

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  • Ultralow-humidity visual detection material as well as preparation method and application thereof
  • Ultralow-humidity visual detection material as well as preparation method and application thereof
  • Ultralow-humidity visual detection material as well as preparation method and application thereof

Examples

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preparation example Construction

[0050] In the present invention, the preparation method of the ultra-low humidity visual detection material preferably includes the following steps: dispersing the hydrochromic molecular switch dye and the moisture-sensitive matrix in a solvent, separating the solid from the liquid, drying the obtained solid product, The ultra-low humidity visual detection material is obtained.

[0051] In the present invention, the mass ratio of the hydrochromic molecular switch dye to the solvent is preferably 0.001-1:1-200, more preferably 0.005-0.8:5-80, further preferably 0.01-0.5:10-50; The solvent preferably includes water and / or an organic solvent, more preferably an organic solvent; the organic solvent preferably includes an alcohol solvent, an ester solvent, a sulfone solvent, an amide solvent, a silane solvent, a ketone solvent, a furan solvent , one or more of halogenated alkane solvents, aromatic hydrocarbon solvents and amine solvents, more preferably methanol, ethanol, n-butanol...

Embodiment 1

[0065] according to figure 1 The flow chart shown is the preparation of the ultra-low humidity visual detection card.

[0066] Mix 0.2 parts of 4-amino-(3',6'-bis(diethylamino)-spiro[isobenzofuran-1,9'-oxanthene]-3-one, 10 parts of filter paper microfiber and 40 parts Stir ethanol at 500rpm for 30min, suction filter and shape, dry the obtained solid product and cut it to obtain a solid product with a thickness of 0.6mm and a volume of 0.1cm 3 , Circular ultra-low humidity visual detection card (denoted as WSP).

[0067] The ultra-low humidity visual detection card prepared in this example has a detection limit of 200 ppm for humidity in the glove box. When the air humidity is ≥ 200 ppm, the ultra-low humidity visual detection card changes from light red to magenta.

Embodiment 2

[0069] according to figure 1 The flow chart shown is the preparation of the ultra-low humidity visual detection card.

[0070] 0.1 part of methyl (E)-3-((4-(2-(9,9-dimethyl-7-nitro-2,3-dihydrooxazolo[3,2-a]indole -9a (9H)-yl) vinyl) phenyl) (ethyl) amino) propionate, 10 parts of cotton microfibers and 50 parts of tetrahydrofuran alcohol were stirred at 600 rpm for 60 min, and after adding 2 parts of glycerin, they were stirred at 1000 rpm Stir for 45 minutes under the same conditions, suction filter and shape, dry the obtained solid product and cut it to obtain a 2.5cm thick product with a thickness of 0.4mm and a volume of 2.5cm 3 , Rectangular ultra-low humidity visual detection card (denoted as WSP).

[0071] The ultra-low humidity visual detection card prepared in this example has a detection limit of 250 ppm for humidity in the glove box. When the air humidity is ≥ 250 ppm, the ultra-low humidity visual detection card changes from light red to magenta.

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Abstract

The invention provides an ultralow-humidity visual detection material as well as a preparation method and application thereof, and relates to the technical field of humidity detection. The response mechanism of the ultra-low humidity visual detection material to water is that water molecules induce the hydrochromic molecular switch dye to generate an on / off isomerization process, and specifically, the humidity sensing matrix can capture trace water and also has an auxiliary activation effect on the hydrochromic molecular switch dye; the oxazoline, oxazine and fluorane hydrochromic dye can quickly react with trace water molecules to cause chemical bond breakage in the ring structure of the oxazoline, oxazine and fluorane hydrochromic dye, so that a zwitter-ion structure with increased conjugation degree is formed, and obvious color change is brought; therefore, accurate visual detection of ultra-low humidity below 250ppm is realized. In addition, the ultralow-humidity visual detection material can be repeatedly used for multiple times.

Description

technical field [0001] The invention relates to the technical field of humidity detection, in particular to an ultra-low humidity visual detection material and a preparation method and application thereof. Background technique [0002] The measurement and monitoring of ultra-low humidity plays an extremely critical role in some important industrial productions. For example, in order to avoid the deterioration of electrical properties caused by the corrosion of moisture on metal devices, the environmental moisture in the manufacture of chips, integrated circuits and some precision electronic equipment It needs to be less than 100ppm; the water content in the research and development environment for the preparation of high-performance solar cells, lithium-ion batteries, organic electroluminescent devices (OLEDs), optical fibers, and supercapacitors should not be higher than 1ppm. In addition, the safety detection of insulating gas during power transmission and aviation explora...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/81
CPCG01N21/81
Inventor 盛兰卫小燕张晓安
Owner JILIN UNIV
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