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Preparation method of mixed four-template magnetic imprinted polymer and application thereof

A technology of imprinting polymers and four templates, which is applied in the fields of alkali metal compounds, chemical instruments and methods, and other chemical processes, can solve the problems of non-display, high adsorption capacity, etc., and achieve convenient function design, large adsorption capacity, and selectivity strong effect

Active Publication Date: 2017-03-15
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The preparation of most MIPs uses a single template molecule, so the synthesized polymer cannot have high affinity for multiple types of analytes at the same time
However, in actual detection, there is often not a single type or type of analyte, so the adsorption of MIPs synthesized with a single template to other types of compounds cannot show high adsorption capacity and high selectivity.

Method used

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  • Preparation method of mixed four-template magnetic imprinted polymer and application thereof
  • Preparation method of mixed four-template magnetic imprinted polymer and application thereof
  • Preparation method of mixed four-template magnetic imprinted polymer and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Example 1 A method for preparing a mixed four-template magnetically imprinted polymer

[0081] For the preparation method of the mixed four-template magnetically imprinted polymer provided in this example, see the principle of the imprinting reaction in Figure 5 , the preparation method is carried out according to the following steps:

[0082] (11) Preparation and modification of magnetic microspheres

[0083] ① Weigh 0.018mol FeCl respectively 3 ·6H 2 O and 0.01mol FeCl 2 4H 2 O, put it into a 250 mL three-neck flask, then add 80 mL of ultrapure water to it, and introduce N 2 , stirred continuously at 800 rpm, and added 10 mL of concentrated ammonia water dropwise at 80°C water bath temperature, matured for 30 min, and separated the product with a magnet;

[0084] The product was washed to neutrality with deoxygenated ultrapure water, washed three times with ethanol, and finally dried under vacuum at 50°C for 24 h to obtain Fe 3 o 4 ;

[0085] ② Weigh 0.3 g F...

Embodiment 2-5

[0099] Example 2-5 Preparation method of mixed four-template magnetically imprinted polymer microspheres

[0100] Examples 2-5 are respectively a preparation method of a mixed four-template magnetically imprinted polymer microsphere. Their preparation process is the same as that of Example 1, the only difference is that the corresponding technical parameters are different. For specific results, see Table 1.

[0101] Table 1 Technical parameters of mixed four-template magnetically imprinted polymer microspheres

[0102]

[0103] Examples 2-5 The preparation process is easy to control, low cost, the imprinted polymer does not need grinding and column packing, the microspheres have good stability, high strength, acid and alkali resistance, and the imprinted polymer has specific spatial sites, which can achieve specific adsorption .

Embodiment 6

[0104] Example 6 Selection of functional monomers and determination of the ratio of template molecules to functional monomers

[0105] In this example, the selection of functional monomers and the determination of the ratio of template substances to functional monomers were explored during the polymerization process. In this embodiment, ultraviolet spectroscopy is used to scan the ultraviolet spectrum of the mixed four-template substance-MAA system and the mixed four-template substance-AM system respectively.

[0106] Prepare a certain concentration of MAA-acetonitrile solution and AM-acetonitrile solution and a mixed four-template substance-acetonitrile solution, and prepare a mixed acetonitrile solution of functional monomers and template substances so that the molar ratios are 1:0, 1:2, respectively. 1:4, 1:6, 1:8, 1:10, scan the UV spectrum at a wavelength of 190-400nm.

[0107] If there is no interaction between the template molecule and the functional monomer, the UV ab...

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Abstract

The invention discloses a preparation method of a mixed four-template magnetic imprinted polymer. The preparation method comprises the following steps of preparation and modification of magnetic microspheres, dissolving, pre-polymerizing, polymerizing, template eluting, drying and the like. The preparation method is characterized in that four matters are used as templates; in a polymerizing process, the modified magnetic microspheres are added to synthesize a magnetic molecular imprinted polymer with specificity identification on triazole matters, pyrethroid matters, triazine matters and carbamate matters. The preparation method has the advantages that the preparation process is easily controlled, the function design is convenient, the prepared polymer has high stability and strength and can resist acid and alkaline, grinding and column loading are not needed, and the efficiency of adsorbing triazole, pyrethroid, triazine and carbamate matters is high; the preparation method is suitable for preparing the microspheres of the mixed four-template magnetic imprinted polymer, and the prepared polymer can be further used for separating and measuring samples when multiple residues of triazole, pyrethroid, triazine and carbamate pesticides in foods, feeds and other samples are simultaneously analyzed.

Description

technical field [0001] The invention belongs to the fields of chemical synthesis, analytical chemistry, supramolecular chemistry and food safety, and relates to the preparation and application of magnetic molecularly imprinted polymers, in particular to a preparation method and application of a mixed four-template magnetically imprinted polymer. Background technique [0002] Tebuconazole, bifentriazole and diniconazole are all triazole fungicides, which are broad-spectrum systemic fungicides, mainly used for the prevention and treatment of plant diseases, and have the effect of killing or inhibiting the growth of pathogenic microorganisms. High efficiency, broad spectrum, low toxicity and long-term effect are widely used in the control of crops and other pests. At the same time, the residues of such pesticides in crops, soil and water also have negative effects on biological safety and human health. [0003] Tetramethrin, cyhalothrin and perfluthrin all belong to pyrethroid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/14C08F220/06C08F220/56C08J9/28C08K9/06C08K9/10C08K3/22B01J20/26B01J20/30B01J20/28
CPCB01J20/06B01J20/103B01J20/261B01J20/28009B01J2220/46B01J2220/4806B01J2220/4812C08F222/1006C08F222/102C08J9/28C08J2335/02C08K3/22C08K9/06C08K9/10C08K2003/2275C08K2201/01C08F220/06C08F220/56
Inventor 高文惠李亚丽赵玲钰何丛薇
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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