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Colorimetric-fluorescent fiber membrane for detecting hypochlorite ions, and preparation method thereof

A fluorescent fiber and hypochlorite technology, applied in fluorescence/phosphorescence, measuring devices, and material analysis through optical means, can solve expensive problems and achieve low detection limit, simple operation, and high sensitivity

Active Publication Date: 2020-02-04
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This analysis method not only needs to prepare the detection solution in advance, but also requires expensive instruments and professional operators.

Method used

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  • Colorimetric-fluorescent fiber membrane for detecting hypochlorite ions, and preparation method thereof
  • Colorimetric-fluorescent fiber membrane for detecting hypochlorite ions, and preparation method thereof
  • Colorimetric-fluorescent fiber membrane for detecting hypochlorite ions, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Preparation of modified poly(hydroxyethyl methacrylate):

[0025] a, 1mmol colorimetric-fluorescent probe molecule containing double bond ((E)-((4-(2-(4-cyano-5-(dicyanomethylene)-2,2-dimethyl -2,5-dihydrofuran-3-yl)vinyl)phenyl)azanediyl)bis(ethane-2,1-diyl)diacrylate) and 100mmol hydroxyethyl methacrylate dissolved in In 1010mmol tetrahydrofuran, after passing nitrogen for 20min, add 2.02mmol initiator azobisisobutyronitrile, heat up to 70°C, reflux for 12h, cool to room temperature, then deposit the reaction solution in 5000mL petroleum ether, suction filter, wash, After drying, 80 mmol of modified polyhydroxyethyl methacrylate was obtained, with a yield of 79.2%;

[0026] Preparation and detection of hypochlorite colorimetric - fluorescent fiber membrane:

[0027] b. Put 0.5 g of the modified polyhydroxyethyl methacrylate obtained in step a and 9.5 g of polystyrene in a mortar and grind them to powder, and mix them uniformly to obtain 10 g of the mixed material; ...

Embodiment 2

[0030] Preparation of modified poly(hydroxyethyl methacrylate):

[0031] a, 0.1mmol colorimetric-fluorescent probe molecule containing double bond ((E)-((4-(2-(4-cyano-5-(dicyanomethylene)-2,2-dimethyl Base-2,5-dihydrofuran-3-yl)vinyl)phenyl)azanediyl)bis(ethane-2,1-diyl)diacrylate) dissolved in 100mmol hydroxyethyl methacrylate In 1001mmol tetrahydrofuran, after passing nitrogen for 20min, add 2.002mmol initiator azobisisobutyronitrile, raise the temperature to 70°C, reflux for 12h, cool to room temperature, and deposit the reaction solution in 5000mL petroleum ether, suction filter, wash and dry , to obtain 76 mmol of modified polyhydroxyethyl methacrylate, with a yield of 75.9%;

[0032] Preparation and detection of hypochlorite colorimetric - fluorescent fiber membrane:

[0033] b. Put 2.0 g of the modified polyhydroxyethyl methacrylate obtained in step a and 8.0 g of polystyrene in a mortar and grind them to powder, and mix them uniformly to obtain 10 g of the mixed mat...

Embodiment 3

[0036] Preparation of modified poly(hydroxyethyl methacrylate):

[0037]a. Mix 0.2mmol colorimetric-fluorescent probe molecule with double bond ((E)-((4-(2-(4-cyano-5-(dicyanomethylene)-2,2-dimethyl Base-2,5-dihydrofuran-3-yl)vinyl)phenyl)azanediyl)bis(ethane-2,1-diyl)diacrylate) dissolved in 100mmol hydroxyethyl methacrylate In 1002mmol tetrahydrofuran, after passing nitrogen for 20min, add 2.004mmol initiator azobisisobutyronitrile, heat up to 70°C, reflux for 12h, cool to room temperature, the reaction solution is deposited in 5000mL petroleum ether, suction filtered, washed and dried , to obtain 77 mmol of modified polyhydroxyethyl methacrylate, with a yield of 77.2%;

[0038] Preparation and detection of hypochlorite colorimetric - fluorescent fiber membrane:

[0039] b. Put 1.25 g of the modified polyhydroxyethyl methacrylate obtained in step a and 8.75 g of polystyrene into a mortar and grind them to powder, and mix them uniformly to obtain 10 g of the mixed material;...

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Abstract

The invention provides a colorimetric-fluorescent fiber membrane for detecting hypochlorite ions, and a preparation method thereof. The preparation method of the fluorescent fiber membrane comprises the following steps: carrying out free radical polymerization on a double bond-containing colorimetric-fluorescent probe molecule ((E)-((4-(2-(4-cyano-5-(dicyanomethylene)-2,2-dimethyl-2,5-dihydrofuran-3-yl)vinyl)phenyl)azanediyl)bis(ethane-2,1-diyl)diacrylate) and hydroxyethyl methacrylate to obtain modified poly(hydroxyethyl methacrylate), and grinding the modified poly(hydroxyethyl methacrylate)and polystyrene to obtain the colorimetric-fluorescent fiber membrane. The colorimetric-fluorescent fiber membrane for detecting hypochlorite ions has a fluorescence emission peak at 632 nm and an ultraviolet absorption peak at 544 nm, has obvious fluorescence quenching and fading response and a high response speed when used to detect the hypochlorite ions, and achieves onsite, rapid, convenientand visual detection of hypochlorite ions in a water sample in the environment and a non-standard explosive raw material.

Description

technical field [0001] The invention relates to the field of electrospinning technology and the detection of environment and non-standard explosives, and provides a colorimetric-fluorescent fiber membrane for preparing and detecting hypochlorite and a preparation method thereof. Background technique [0002] Electrospinning is a simple and effective method for preparing continuous nanofiber membranes. The spun fibers have the advantages of small diameter, large specific surface area, high porosity and good uniformity, and are widely used in filtration, protective textiles, and drug delivery. , tissue engineering, electronic and photonic devices, sensors and catalysis. In 2007, Professor Li Guangtao (Journal of Materials Chemistry 2007, 17, 2730-2736) introduced electrospinning technology into the field of TNT sensing for the first time, and can detect gaseous TNT molecules at the 10ppb level. Kumar (Technologies for Homeland Security, IEEE Conference on 2008, 390-394) etc. ...

Claims

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Application Information

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IPC IPC(8): C08L25/06C08L33/14C08J5/18C08F220/20C08F222/26G01N21/64
CPCC08J5/18C08F220/20G01N21/643C08J2325/06C08J2433/14G01N2021/6432
Inventor 蔡珍珍窦新存
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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