Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method and application of mixed five-template magnetic imprinted polymer

A technology of imprinting polymers and magnetic composite microspheres, which is applied in the direction of alkali metal compounds, chemical instruments and methods, and other chemical processes, can solve the problem of low residual concentration, achieve large adsorption capacity, easy control of preparation conditions, and selectivity strong effect

Active Publication Date: 2018-11-06
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low residual concentration of these substances in the natural environment and the presence of a variety of interfering substances, it is difficult for conventional monitoring and analysis methods to effectively measure them.
In addition, the matrix effect brought by the complex matrix also poses a challenge to the analysis of these five types of pesticides. How to minimize the influence of the matrix effect on the analysis results during the sample pretreatment process is a major challenge for researchers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method and application of mixed five-template magnetic imprinted polymer
  • Preparation method and application of mixed five-template magnetic imprinted polymer
  • Preparation method and application of mixed five-template magnetic imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Example 1-a preparation method of a mixed five-template magnetically imprinted polymer

[0076] The preparation of mixed five-template magnetically imprinted polymer in this example, Figure 1-Figure 5 are respectively the chemical structural formulas of the template substances, which are carried out according to the following sequence of steps:

[0077] (1) Preparation and modification of magnetic microspheres

[0078] ① Weigh 1.08g FeCl respectively 3 ·6H 2 O and 0.556 g FeSO 4 4H 2 O, put it into a 100mL round bottom flask, then add 50mL deoxygenated distilled water, stir at 30°C for 30min under nitrogen protection, then add ammonia water dropwise to adjust the pH of the solution between 8-10, keep stirring for 10min, transfer the above solution Put it into a 100mL hydrothermal reaction kettle, put it in an oven at 145°C, and react for 12h. After the reaction, cool to room temperature. Separate the product with a magnet, wash the product to neutrality with deox...

Embodiment 2-6

[0094] Example 2-6 Preparation method of mixed five-template magnetically imprinted polymer microspheres

[0095] This example is a preparation method of mixed five-template magnetically imprinted polymer microspheres. The preparation process is the same as that of Example 1, except that the corresponding technical parameters are different. The specific results are shown in Table 1.

[0096] Table 1 Technical parameters of mixed five-template magnetically imprinted polymer microspheres

[0097]

[0098]

[0099]The preparation process of Examples 2-6 is easy to control and the cost is low. Five template substances can be imprinted on the magnetic microspheres at the same time without by-products. The imprinted polymer does not need to be ground and packed. The microspheres have good stability, high strength, and acid and alkali resistance. , the imprinted polymer has specific spatial sites, which can achieve specific adsorption.

Embodiment 7

[0100] Example 7 Determination of the Ratio of Template Molecules and Functional Monomers

[0101] In this example, the determination of the ratio of the template substance to the functional monomer is explored during the polymerization process. In this embodiment, ultraviolet spectroscopy is used to measure the mixed five-template substance-MAA system respectively.

[0102] Prepare a certain concentration of MAA-acetonitrile solution and a mixed five-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, 1:4, 1, respectively. : 6, 1: 8, 1: 10, scan the ultraviolet spectrum between the wavelength 190-400nm.

[0103] Depend on Figure 6 It can be seen from the figure a in the middle that the maximum absorption wavelength of the mixture has a red shift, which is due to the formation of hydrogen bonds between the mixed five-template substance and the functional mon...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Linearaaaaaaaaaa
Particle sizeaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a suspension polymerization preparation method of a mixed five-plate magnetic imprinted polymer. The method comprises preparation, modification of magnetic microspheres, preparation of a polyvinyl alcohol dispersant, dissolution, prepolymerization, polymerization, template molecular elution and drying. The preparation method uses five substances as template materials, addsmodified magnetic microspheres in the polymerization process and synthesizes magnetic molecularly imprinted polymer for specifically recognizing a triazole substance, a pyrethroid substance, a triazine substance, a carbamate substance and a phenyl urea substance by a suspension polymerization method. In the method, the preparation conditions are easy to be controlled, and the prepared polymer hasgood stability, high strength, acid and alkali resistance, no need of grinding and column packing, and can adsorb a plurality of substances at the same time, and has high adsorption efficiency. The method is suitable for the preparation of mixed five-template magnetic imprinted polymer microspheres, and the prepared product can be further used for the separation and enrichment of samples during simultaneous analysis of the plurality of pesticide residues in food, feed and other samples.

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 five-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. Its 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] In my country, triazoles, pyrethroids, triazines, carbamates, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08J9/28C08F222/14C08F220/06C08F2/20C08L35/02C08K9/10C08K9/06C08K7/18B01J20/26B01J20/28B01J20/30
CPCB01J20/268B01J20/28009C08F2/20C08F222/10C08J9/009C08J9/28C08J2335/02C08K7/18C08K9/06C08K9/10C08K2201/01C08F222/102C08F220/06
Inventor 高文惠张凯杰李亚丽
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com