Synthesis of an ionic liquid-based fluorescent hydrogel sensor and its application in the detection of p-nitroaniline

A hydrogel and sensor technology, applied in the application of detecting p-nitroaniline, in the field of synthesis of fluorescent hydrogel sensors, can solve problems such as sensitivity limitation, and achieve the effects of high sensitivity, simple synthesis method and short detection time.

Active Publication Date: 2022-08-02
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This performance can address some of the shortcomings of traditional rigid sensors, especially sensitivity limitations due to hindered diffusion of contaminants in traditional dense thin-film materials

Method used

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  • Synthesis of an ionic liquid-based fluorescent hydrogel sensor and its application in the detection of p-nitroaniline
  • Synthesis of an ionic liquid-based fluorescent hydrogel sensor and its application in the detection of p-nitroaniline
  • Synthesis of an ionic liquid-based fluorescent hydrogel sensor and its application in the detection of p-nitroaniline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 300 mg of hydroxyethyl methacrylate, 3.5 mg of N,N'-methylenebisacrylamide, 4 mg of azobisisobutyronitrile, and 10 mg of 3-(anthracene-9-ylmethyl)-1-ethylene The base-1H-imidazole-3-onium chloride was added to 10 mL of dimethyl sulfoxide, sonicated for 10 min, added to the flask, and then added blank paper; evacuated and filled with argon, and carried out three cycles of degassing, argon purging, The flask was closed and placed in an oil bath at a temperature of 80 °C for 15 h; washed with ethanol, dimethyl sulfoxide and deionized water in turn, and dried in vacuum to synthesize a fluorescent hydrogel sensor.

[0027] 1. Microscopic morphology of the fluorescent hydrogel sensor.

[0028] Microscopic morphology: The microscopic morphology of the fluorescent hydrogel sensor synthesized in Example 1 was observed by scanning electron microscope. figure 1 and figure 2 As shown, it can be seen that the fibrous network structure of the filter paper is wrapped with a h...

Embodiment 2

[0037]Weigh 600 mg of hydroxyethyl methacrylate, 7 mg of N,N'-methylenebisacrylamide, 8 mg of azobisisobutyronitrile, and 20 mg of 3-(anthracene-9-ylmethyl)-1-vinyl -1H-imidazol-3-onium chloride was added to 20 mL of dimethyl sulfoxide, sonicated for 10 min, added to the flask, and then added to the textile; vacuumed and filled with argon, degassed for three cycles, purged with argon, and sealed The flask was placed in an oil bath at 60°C for 24 hours; washed with ethanol, dimethyl sulfoxide, and deionized water in turn, and dried in vacuum to synthesize a fluorescent hydrogel sensor.

Embodiment 3

[0039] Weigh 450 mg of hydroxyethyl methacrylate, 5.25 mg of N,N'-methylenebisacrylamide, 6 mg of azobisisobutyronitrile, and 15 mg of 3-(anthracene-9-ylmethyl)-1-ethylene The base-1H-imidazole-3-onium chloride was added to 7.5 mL of dimethyl sulfoxide, sonicated for 10 min, added to the flask, and then added to the textile; vacuumed and filled with argon, degassed for three cycles, and purged with argon. , closed the flask, and placed it in an oil bath at 100 °C for 8 h; washed with ethanol, dimethyl sulfoxide, and deionized water in turn, and vacuum-dried to synthesize a fluorescent hydrogel sensor.

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Abstract

The invention discloses the synthesis of an ionic liquid-based fluorescent hydrogel sensor and its application in detecting p-nitroaniline. The ionic liquid monomer and initiator azobisisobutyronitrile were dissolved in dimethyl sulfoxide to prepare a mixed solution, the mixed solution was adsorbed on the substrate material, cross-linked in situ under heating conditions, washed and dried to synthesize a fluorescent hydrogel sensor . The material can be used as a fluorescence sensor for rapid detection of p-nitroaniline, has the advantages of high sensitivity, short detection time, good selectivity, etc., and can be applied to the detection of p-nitroaniline in environmental living water samples.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and relates to a method for synthesizing a fluorescent hydrogel sensor based on ionic liquid; the invention also relates to an ionic liquid-based fluorescent hydrogel sensor synthesized by the method for detecting p-nitroaniline applications in . Background technique [0002] p-Nitroaniline (p-NA) is an important chemical intermediate, which is widely used as dyes, pesticides, pharmaceutical intermediates, as well as in the production of antioxidants, preservatives, etc. In industrial production, p-NA is released into the environment in the form of industrial waste. Due to the good solubility of p-NA in water, it is easy to infiltrate and accumulate in soil or groundwater. p-NA is highly toxic, mutagenic and carcinogenic. It is not only highly toxic to aquatic organisms, but also harmful to human health. It can be absorbed through the skin and respiratory tract, and cause diseases s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/20C08F222/38C08F226/06C09K11/06G01N21/64
CPCC08F220/20C09K11/06G01N21/6402C09K2211/14C08F222/385C08F226/06
Inventor 宋鹏飞马菁菁李永莉马菊萍姬维刚席琦
Owner NORTHWEST NORMAL UNIVERSITY
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