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A method for preparing diisononyl phthalate molecularly imprinted microspheres

A technology of diisononyl phthalate and molecularly imprinted microspheres, which is applied in the field of molecularly imprinted polymer preparation, can solve the problems of many interference factors and unfavorable detection, and achieve the effect of reducing matrix interference and improving efficiency

Inactive Publication Date: 2019-04-02
南通市产品质量监督检验所
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, its content is relatively low, but due to the complex food matrix and many interference factors, it is not conducive to the detection of these trace and trace components, and it is necessary to extract and enrich the target substances in a targeted manner

Method used

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  • A method for preparing diisononyl phthalate molecularly imprinted microspheres
  • A method for preparing diisononyl phthalate molecularly imprinted microspheres
  • A method for preparing diisononyl phthalate molecularly imprinted microspheres

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Embodiment

[0023] The preparation method of diisononyl phthalate molecularly imprinted microspheres in this example, the preparation method comprises the following steps:

[0024] Step 1: Add 0.5mmol template molecule diisononyl phthalate and 3mmol functional monomer methacrylic acid in molar ratio to 200mL acetonitrile, and then ultrasonically mix thoroughly to form a mixed solution, which is left to stand at 4°C 12 hours;

[0025] Step 2: Add 10 mmol of ethylene glycol dimethacrylate as a crosslinking agent and 60 mg of azobisisobutyrocyanide as an initiator to the mixture in step 1. After mixing, blow nitrogen gas for 20 minutes to remove oxygen. In a water bath with a heat-collecting magnetic stirrer, stir and react at 65°C for 24 hours;

[0026] Step 3: After the reaction, cool to room temperature, and centrifuge the reaction mixture at a speed of 10,000 rpm for 15 minutes to collect the precipitated polymer; then use a large amount of methanol-acetic acid mixture (v / v=9:1) to repe...

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Abstract

The invention relates to a method for preparing diisononyl phthalate molecularly imprinted microspheres. The method is a method for preparing molecularly imprinted microspheres having an identification function based on the molecular imprinting technology, by adopting diisononyl phthalate as a template molecule, methacrylic acid as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, acetonitrile as a reaction solvent, and 2,2'-azobis(2-methylpropionitrile) as an initiator. The method is advantageous in that a target compound can be enriched in an oriented manner, thusreducing matrix interferences and increasing the pretreatment efficiency of samples; the prepared diisononyl phthalate molecularly imprinted microspheres can be adopted as a filler medium for samplepretreatment, so that a target product can be effectively enriched, and analysis and detection of micro- and trace diisononyl phthalate can be achieved.

Description

technical field [0001] The invention relates to a method for preparing molecularly imprinted polymers, in particular to a method for preparing diisononyl phthalate molecularly imprinted microspheres. Background technique [0002] Phthalate acid esters (PAEs for short), also known as phthalate esters, are commonly used plasticizers, which are distributed between macromolecular chains during the processing of polymer materials, and are non-cohesive through hydrogen bonds or van der Waals forces. Valence combination, thereby reducing the intermolecular force and enhancing the flexibility of the product, it is widely used as an additive for polymer materials such as food packaging, children's toys, cosmetics, and textiles. At the same time, phthalates are also a class of environmental estrogen , interferes with the endocrine system. Diisononyl phthalate (Dinonyl phthalate, DINP) belongs to a kind of phthalates. Compared with other compounds in phthalates, it is more ), Di-n-o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/28C08F222/14C08F220/06G01N1/40
CPCC08F222/1006C08J9/28C08J2335/02C08F222/102G01N1/40C08F220/06
Inventor 邵彪周小兰陈刚王晓刚
Owner 南通市产品质量监督检验所
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