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Preparation method and application of long-afterglow molecularly imprinted polymer

A technology of molecular imprinting and long afterglow, applied in alkali metal compounds, chemical instruments and methods, analytical materials, etc., can solve problems such as toxin residues, and achieve strong adsorption specificity, excellent luminescent performance, and excellent long-life fluorescence emission effects

Active Publication Date: 2020-01-10
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For toxin poisoning, in the traditional treatment, vomiting, gastric lavage and other treatment methods are generally used, but it is inevitable that a large amount of toxin remains in the body

Method used

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  • Preparation method and application of long-afterglow molecularly imprinted polymer
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  • Preparation method and application of long-afterglow molecularly imprinted polymer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A method for preparing a long afterglow molecularly imprinted polymer, comprising the steps of:

[0032] (1) Preparation of long-lasting nanomaterials PLNPs by means of solvothermal method;

[0033] Preparation of long afterglow nanomaterials PLNPs: Accurately weigh 1.4874g of Zn(NO 3 ) 2 ·6H 2 O solid was put into a 50mL round bottom flask, and 10mL Ga(NO 3 ) 3 solution (0.6M), stirring, until Zn(NO 3 ) 2 After fully dissolved, add 300 μL Cr(NO 3 ) 3 solution (0.1M), 1500μL Yb(NO 3 ) 3 solution (0.1M), 150μL Er(NO 3 ) 3 Solution (0.1M) and 10mL ammonium germanate solution (0.1M) were mixed and stirred, and the pH was adjusted, and a coprecipitation reaction occurred to obtain a reaction solution. , pH 7.5) after 24 hours of reaction, the product was washed by centrifugation and roughly ground with an agate mortar, then calcined at 750°C for 5 hours to obtain long-lasting nano-luminescent materials PLNPs;

[0034] Size screening of long afterglow nanomateri...

Embodiment 2

[0039] A method for preparing a long-lasting molecularly imprinted polymer, the steps and methods are basically the same as in Example 1, the difference is that the biotoxin is aflatoxin B1, and the corresponding template molecule is 5,7-dimethoxycoumarin .

Embodiment 3

[0041] A method for preparing a long-lasting molecularly imprinted polymer. The steps and method are basically the same as in Example 1, except that the biotoxin is ochratoxin, and the corresponding template molecule is ochratoxin.

[0042] figure 1 It is the transmission electron microscope picture of the long-lasting molecularly imprinted polymer, which shows that the prepared molecularly imprinted polymer has good particle size uniformity, and the size is about 50nm, which is suitable as an adsorption material.

[0043] figure 2 It is the fluorescence emission property of long-lasting molecularly imprinted polymers, which has strong fluorescence emission in the near-infrared region, and MIP has no significant effect on the fluorescence properties of PLNPs.

[0044] image 3 The infrared absorption spectrum characterization of the long-lasting molecularly imprinted polymer proved that the MIP was successfully coated on the surface of PLNPs.

[0045] Figure 4 The crysta...

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Abstract

The invention relates to a preparation method and application of a long-afterglow molecularly imprinted polymer. The preparation method comprises the following steps: (a) preparing a long-afterglow nano material PLNPs using solvothermal method; (b) coating the surface of the long-afterglow nano material with molecularly imprinted polymer PLNPs@MIP through sol-gel method, and applying the molecularly imprinted polymer PLNPs@MIP to specific adsorption of target biotoxins. The preparation method has the beneficial effects that the molecularly imprinted polymer nano-carrier taking the long afterglow material as a light-emitting core is successfully prepared, the surfaces of the long afterglow nano-particles are modified with the molecularly imprinted polymer to serve as an adsorption layer, and the composite material is uniform in size and particle size and high in adsorption specificity on target objects.

Description

technical field [0001] The invention belongs to the research field of food hazard factor enrichment detection, and relates to a preparation method and application of a long afterglow molecularly imprinted polymer. Background technique [0002] Food safety is currently a hot issue of global concern, and it is becoming more and more serious with economic growth and population increase. Food safety is an interdisciplinary field that discusses ensuring food hygiene and food safety during food processing, storage, and sales, reducing hidden dangers of disease, and preventing food poisoning. At present, food safety has become a major threat to human health, and it is also a hot issue of general concern to the whole society. In recent years, with the rapid growth of my country's food supply and consumption, major food safety incidents have occurred frequently, and food safety issues have become more and more prominent. Due to the chemical pollution of a series of food raw materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30B01J20/28B82Y40/00C08F220/06C08F222/14G01N21/64
CPCB01J20/268B01J20/28007B01J20/3057B82Y40/00C08F220/06G01N21/6428
Inventor 刘敬民王硕
Owner NANKAI UNIV
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