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Melamine molecularly imprinted microsphere and preparation method and application thereof

A technology of molecularly imprinted microspheres and melamine, applied in chemical instruments and methods, and other chemical processes, can solve problems such as weak selectivity and complex operations, and achieve the effect of mild reaction conditions and strong operability

Active Publication Date: 2019-03-01
广州出入境检验检疫局综合技术服务中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the complex operation and weak selectivity of the national standard method, in order to overcome the deficiencies of the prior art, one of the objectives of the present invention is to provide a melamine molecularly imprinted microsphere

Method used

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  • Melamine molecularly imprinted microsphere and preparation method and application thereof
  • Melamine molecularly imprinted microsphere and preparation method and application thereof
  • Melamine molecularly imprinted microsphere and preparation method and application thereof

Examples

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preparation example Construction

[0040] The preparation method of the melamine molecularly imprinted microspheres includes the following steps:

[0041] The step of dissolving the dispersant: weigh the formulated amount of the hydroxyethyl cellulose dispersant, add it to water, stir to dissolve the dispersant, and leave to cool to obtain a hydroxyethyl cellulose solution;

[0042] The steps of preparing the water phase: adding the formula amount of 2-acrylamide-2-methylpropanesulfonic acid and melamine to the hydroxyethyl cellulose solution and stirring to obtain the water phase part;

[0043] The steps of preparing the organic phase: adding formula amounts of α-methacrylic acid, ethylene glycol dimethacrylate, and azobisisobutyronitrile to toluene, mixing, and ultrasonic dissolving to obtain the organic phase part;

[0044] Reaction steps: Under mechanical stirring, slowly add the organic phase part to the water phase part dropwise, pour in nitrogen, and after deoxygenation by nitrogen for 15min, airtight; under the ...

Embodiment 1

[0054] Example 1 Melamine molecularly imprinted microspheres

[0055] A melamine molecularly imprinted microsphere is prepared from the following components in millimoles: 0.85mmol of melamine, 5mmol of 2-acrylamide-2-methylpropanesulfonic acid, 5mmol of α-methacrylic acid, and 8mmol of hydroxyethyl cellulose , Ethylene glycol dimethacrylate 38mmol, azobisisobutyronitrile 0.5mmol, toluene 50ml.

Embodiment 2

[0056] Example 2 Melamine molecularly imprinted microspheres

[0057] A melamine molecularly imprinted microsphere is prepared from the following components in millimoles: 1mmol of melamine, 6mmol of 2-acrylamide-2-methylpropanesulfonic acid, 6mmol of α-methacrylic acid, 10mmol of hydroxyethylcellulose, Ethylene glycol dimethacrylate 40mmol, azobisisobutyronitrile 0.6mmol, and toluene 75ml.

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Abstract

The invention discloses a melamine molecularly imprinted microsphere and a preparation method and application thereof. The melamine molecularly imprinted microsphere is prepared from the following components by millimole: 0.85-1.15 mmol of melamine, 5-7 mmol of 2-acrylamide-2-methylpropanesulfonic acid, 5-7 mmol of alpha-methacrylic acid, 8-12 mmol of hydroxyethyl cellulose, 38-42 mmol of ethyleneglycol dimethacrylate, 0.5-0.7 mmol of azodiisobutyronitrile, and 50-100 ml of methylbenzene. Appropriate hydrophilic functional monomers are sought, through screening, the alpha-methacrylic acid andthe 2-acrylamide-2-methylpropanesulfonic acid are adopted as the double-hydrophilic functional monomers to be synthesized into a melamine molecularly imprinted polymer suitable for an aqueous environment, a target object is identified more effectively, the situation that an electron hole structure is destroyed due to hydrogen bonds and the swelling effect of the aqueous environment is effectivelyprevented, and finally, the detecting sensitivity and selectivity of the melamine can be effectively improved.

Description

Technical field [0001] The invention relates to a molecular imprinting technology, in particular to a melamine molecularly imprinted microsphere and a preparation method and application. Background technique [0002] Molecular imprinting technology is a technology for preparing molecularly imprinted polymers with molecular recognition properties for specific target molecules. Molecularly imprinted polymer combines the advantages of biological recognition system and chemical recognition system. It has the characteristics of resistance to harsh environments, high selectivity, good stability, high mechanical strength, simple preparation, etc., and can selectively identify and enrich targets in complex samples . Therefore, molecularly imprinted polymers are widely used in sample pretreatment techniques such as solid phase extraction, solid phase microextraction, and membrane extraction. Solid phase extraction is a solvent-free sample pretreatment technology that integrates sampling...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F222/14C08F220/58C08F220/06C08J9/28B01J20/26B01J20/30C08L35/02
CPCC08F222/10C08J9/28B01J20/268B01J20/28021C08J2335/02C08F222/102C08F220/585C08F220/06
Inventor 郭宗宁戚琦黄雪琳曾绍汉温胜章
Owner 广州出入境检验检疫局综合技术服务中心