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Preparation method of triazine herbicide molecularly imprinted polymer

A technology of molecular imprinting and triazines, which is applied in the direction of chemical instruments and methods, and other chemical processes, can solve the problems of insignificant polymerization imprinting effect, and achieve the effect of improving imprinting effect, product stability, and high adsorption rate

Active Publication Date: 2016-12-07
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of insignificant imprinting effect of traditional bulk polymerization, the present invention provides a method for synthesizing molecularly imprinted polymers of triazine herbicides, which is used to selectively adsorb atrazine, terbuthylazine, sigrazine, and terbutin One or more of Tongtong, Promethazine or Simazine

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  • Preparation method of triazine herbicide molecularly imprinted polymer
  • Preparation method of triazine herbicide molecularly imprinted polymer
  • Preparation method of triazine herbicide molecularly imprinted polymer

Examples

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Embodiment 1

[0025] Example 1: The preparation method of the triazine herbicide molecularly imprinted polymer is as follows:

[0026] (1) Take 206 mg of atrazine standard as template molecule, dissolve in toluene, then add methacrylic acid, and ultrasonically pass through N at 20°C 2 After 10 minutes, place in a constant temperature water bath at 20°C for self-assembly for 8 hours, then slowly add ethylene glycol dimethacrylate dissolved in azobisisobutyronitrile, pass N 2 After 10 minutes, place the mixture in a constant temperature water bath at 20°C for prepolymerization for 3 hours; the molar ratio of atrazine to methacrylic acid is 1:2, and the molar ratio of atrazine to ethylene glycol dimethacrylate is 1 : 10, the mol ratio of azobisisobutyronitrile and ethylene glycol dimethacrylate is 1:100, and the volume ratio of toluene and ethylene glycol dimethacrylate is 1:1;

[0027] (2) Slowly raise the temperature of the constant temperature water bath to the polymerization temperature...

Embodiment 2

[0035] Example 2: The preparation method of the triazine herbicide molecularly imprinted polymer is as follows:

[0036] (1) Take 219.4mg of standard terbutyzine as a template molecule, dissolve it in chloroform, then add methacrylic acid, and ultrasonically pass through N at 30°C. 2 After 10 minutes, place in a constant temperature water bath at 40°C for self-assembly for 10 hours, then slowly add ethylene glycol dimethacrylate dissolved in azobisisobutyronitrile, pass N 2 After 10 minutes, place the mixed solution in a constant temperature water bath at 30°C for pre-polymerization for 5 hours; the molar ratio of terbutyrazine to methacrylic acid is 1:4, and the molar ratio of terbutylazine to ethylene glycol dimethacrylate is 1 :15, the mol ratio of azobisisobutyronitrile and ethylene glycol dimethacrylate is 1:200, and the volume ratio of chloroform and ethylene glycol dimethacrylate is 5:1;

[0037] (2) Slowly raise the temperature of the constant temperature water bath...

Embodiment 3

[0045] Example 3: The preparation method of the molecularly imprinted polymer of the triazine herbicide is as follows:

[0046] (1) Take 174 mg of butyl melamine as a template molecule, dissolve it in acetonitrile, then add methyl methacrylate, and ultrasonically pass through N at 35°C. 2 After 10 minutes, place in a constant temperature water bath at 35°C for self-assembly for 2 hours, then slowly add trimethylolpropane trimethacrylate dissolved in azobisisoheptanonitrile, pass N 2 After 10 minutes, the mixed solution was placed in a constant temperature water bath at 40°C for prepolymerization for 10 hours; the molar ratio of butyl melamine to methyl methacrylate was 1:6, and the molar ratio of butyl melamine to trimethylolpropane trimethacrylate The mol ratio is 1:20, the mol ratio of azobisisoheptanonitrile and trimethylolpropane trimethacrylate is 1:300, and the volume ratio of acetonitrile and trimethylolpropane trimethacrylate is 10: 1;

[0047] (2) Slowly raise the ...

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Abstract

The invention discloses a preparation method of a triazine herbicide molecularly imprinted polymer. The preparation method comprises the steps of carrying out processes of self-assembly, prepolymerization, polymerization and the like by taking triazine herbicides or other analogues as template molecules and adopting a thermal initiation mass polymerization method so as to obtain the triazine herbicide molecularly imprinted polymer, and carrying out steps of synthesis, grinding, sieving, dilution and the like so as to obtain a specific adsorption material. The static adsorption rate of the obtained molecularly imprinted polymer can reach above 95%, the adsorbing capacity of the molecularly imprinted polymer reaches 4.9mg / g, but the adsorption rate of a corresponding non-molecularly imprinted polymer is less than 10%, and the adsorbing capacity of the non-molecularly imprinted polymer is less than 0.51mg / g, so that the imprinting effect is remarkable.

Description

technical field [0001] The invention belongs to the field of polymer synthesis, and relates to the synthesis of a triazine herbicide molecularly imprinted polymer, and the obtained polymer can be used to selectively adsorb atrazine, terbuthine, sigrazine, terbutaline, and protea One or more of simazine or simazine, and combined with liquid chromatography detection technology, can be used to detect atrazine, terbuthine, simazine, terbutin, and proterazine in crops, soil and water The content of one or several substances in net or simazine. Background technique [0002] Triazine herbicides have been widely used due to their high efficiency since their development. But in recent years, some studies have shown that triazine herbicides are suspected endocrine disruptors. Due to their rigid structures similar to benzene rings, triazine herbicides and their derivatives can remain in crops for a long time, posing a threat to food safety. [0003] Molecular imprinting technology i...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F220/06C08F220/14C08J9/28B01J20/26B01J20/30
CPCC08F222/10C08J9/28B01J20/261B01J20/268C08F222/103C08F222/102C08F220/14C08F220/06
Inventor 顾丽莉张梦晓郑亚丽孔光辉师君丽杨万明彭健
Owner KUNMING UNIV OF SCI & TECH
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