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Functional polymer and preparation method and application thereof

A functional polymer technology, applied in material separation, instrumentation, analysis of materials, etc., can solve the problems of time-consuming, complex fluorescent molecular structure, and difficulty of sensing materials, etc., to achieve simple and clear synthesis routes, simple copolymer structures, The effect of high detection sensitivity

Inactive Publication Date: 2010-11-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although these techniques have high sensitivity and specificity, they have defects such as complex sample pretreatment, time-consuming operation, expensive instruments and high operating costs, and offline detection, making it difficult to meet the needs of current detection work.
The Chinese patent application with the publication number CN 101021515A discloses a method for in-situ sampling, separation, enrichment and measurement of heavy metal ions in water bodies, using osmosis to diffuse heavy metal ions from the inside of the membrane to react with polymer compounds, these Macromolecular compounds are mainly hydroxymethylcellulose, chitosan and sodium polyacrylate, etc., whose functional groups can combine with heavy metal ions, but in fact there is no selective adsorption performance, and the detection steps are complicated and time-consuming; and because they are Using atomic absorption spectrometry to calculate the concentration of heavy metal ions, which cannot be detected in real time
Chinese patent CN200610009925.8 discloses the application of a fluorescent molecular probe in the detection of transition metals and heavy metal ions. 2+ Fluorescent probes for selective fluorescence enhanced recognition. The fluorescent molecular structure is relatively complex, and column chromatography steps are required for separation and purification. It is difficult to realize industrial application as a sensing material, and it is still impossible to achieve online real-time and simple and fast detection

Method used

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  • Functional polymer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] Take 6.0777g of 2-mercaptobenzothiazole and add it to the polymerization bottle, dissolve it completely with 15ml of tetrahydrofuran, then add 1.5302g of sodium hydride into the bottle, a large number of bubbles will be formed during the reaction, and fully react for half a day at room temperature after the bubbles completely disappear. hours to form 2-mercaptobenzothiazole sodium salt. Take out the supernatant sodium salt clear solution in the reaction flask with a syringe, then add it to 10.2ml of tetrahydrofuran solution containing 5.20ml of p-chloromethylstyrene and continue to react at 50°C for 24h. The reaction solution was added dropwise to a large amount of 3‰ sodium hydroxide aqueous solution to precipitate, and a filter cake was formed by suction filtration, then washed with a 3‰ sodium hydroxide aqueous solution and separated, vacuum-dried to constant weight, and prepared In 2-mercaptobenzothiazole derivatives.

[0050] Dissolve 1ml of N-vinylimidazole monom...

Embodiment 2

[0055] Dissolve 0.5ml of N-vinylimidazole monomer and 1g of the 2-mercaptobenzothiazole derivative prepared in Example 1 in 15ml of dioxane, stir it under a nitrogen atmosphere to fully dissolve it, and then add 10mg of azobis Isobutyronitrile, fully stirred, reacted at a constant temperature in an oil bath of 80°C under nitrogen atmosphere for 24 hours, then took it out and cooled it to room temperature naturally. After the reaction is completed, it is a slightly turbid slightly yellow solution, which is centrifuged at 3500 rpm for 10 minutes to remove the suspended insoluble particles in the reaction solution; the upper layer of light yellow supernatant is precipitated in a large amount of acetone, and is also centrifuged at 3500 rpm for 10 minutes to obtain A light yellow precipitate was dried in a vacuum oven at 60° C. to a constant weight to obtain 0.85 g of a functional polymer: poly(2-mercaptobenzothiazole derivative-co-N-vinylimidazole) random copolymer. The weight-ave...

Embodiment 3

[0059] Dissolve 0.5ml of N-vinylimidazole monomer and 0.5073g of the 2-mercaptobenzothiazole derivative prepared in Example 1 in 10ml of dioxane, stir it under a nitrogen atmosphere to fully dissolve it, and then add 8mg of azo Diisobutyronitrile, fully stirred, reacted at a constant temperature in an oil bath at 80°C under nitrogen atmosphere for 24 hours, then took it out and cooled it to room temperature naturally. After the reaction was completed, it was a slightly turbid slightly yellow solution, which was centrifuged at 3500 rpm for 10 minutes to remove suspended insoluble particles in the reaction solution; the light yellow supernatant liquid in the upper layer was precipitated in a large amount of acetone, and centrifuged at 3500 rpm for 10 minutes to obtain a light yellow precipitate. The precipitate was dried in a vacuum oven at 60° C. to a constant weight to obtain 0.75 g of a functional polymer: poly(2-mercaptobenzothiazole derivative-co-N-vinylimidazole) random cop...

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Abstract

The invention discloses a functional polymer. The functional polymer is a random copolymer consisting of N-vinylimidazole structural unit and 2-mercaptobenzothiazole derivative structural unit, and the weight-average molecular weight of the random copolymer is 6,000 to 15,000; and the molar percentage content of the N-vinylimidazole structural unit in the random copolymer is 20 to 45 percent, and the molar percentage content of the 2-mercaptobenzothiazole derivative structural unit is 55 to 80 percent. The invention also discloses a preparation method for the functional polymer and application. The polymer structure contains bonding points of an imidazole ring and S and N heteroatom groups easily coordinated with heavy metal ions, so the polymer prepared by the method and a film thereof can selectively adsorb and detect the heavy metal ions in the water.

Description

technical field [0001] The invention relates to the field of organic polymer sensing materials and environmental monitoring, in particular to a functional polymer based on quartz crystal microbalance technology and its preparation and application. The functional polymer can be applied to the identification and detection of heavy metal ions in water and the field of preparing chemical sensors. Background technique [0002] Over the past 20 years, extensive economic growth has resulted in the rapid development of my country's national economy, but also seriously polluted the natural environment. Various environmental pollutants, especially heavy metal ions such as cadmium, cobalt, lead and copper ions produced in industrial production, enter the water and soil environment, which not only pollutes the natural environment, but also endangers human survival and health. Therefore, the identification and detection of trace heavy metal ions in water is of great significance for the...

Claims

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Application Information

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IPC IPC(8): C08F212/32C08F226/06G01N5/00G01N30/00
Inventor 杜滨阳曹峥徐君庭范志强
Owner ZHEJIANG UNIV
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