Preparation method of phthalophos molecular imprinting polymer

A technology of imophos and molecular imprinting, applied in the fields of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve problems such as unfavorable sample purification and tedious sample pretreatment process, and achieve strong The effect of anti-harsh environment ability, easy control of reaction conditions and long service life

Inactive Publication Date: 2012-02-01
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, the above methods require a relatively cumbersome sample pretreatment process in the detection process, usually using solid phase extraction technology
However, the adsorption of analytes by traditional solid-phase extraction fillers is usually non-specific, which is not conducive to the purification of samples.

Method used

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Examples

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Embodiment Construction

[0010] The following examples are used to further illustrate the present invention; the following examples are illustrative and not restrictive, and cannot be used to limit the scope of protection of the present invention.

[0011] The present invention uses molecular imprinting technology to synthesize an adsorption functional material with high selectivity to imidophos, and its specific examples are:

[0012] (1) Accurately measure 3.0 mL of tetrahydrofuran and 1.0 mL of toluene into a round-bottomed flask, take 1 mmol of imidophos, 4 mmol of methacrylic acid, 4 mmol of trimethylolpropane methyl trimethacrylate, stir and react for 4h, add 40mg azobisisobutyronitrile, bubbling with nitrogen for 15min, sealing, and incubating in a 60℃ water bath for 24h

[0013] (2) The above-mentioned polymerized product is pulverized and sieved to remove fine particles

[0014] (3) The polymer was extracted with a mixture of 300 mL of methanol: glacial acetic acid at a ratio of 9:1 in a Soxhlet extr...

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Abstract

The invention relates to a preparation method of a phthalophos molecular imprinting polymer. The preparation method is mainly and technically characterized by comprising the following steps of: dissolving phthalophos as a template molecule, methacrylic acid as a functional monomer and trimethylolpropane methyl methacrylate as a cross linker in a pore-foaming agent according to mole ratio of 1:4:4, wherein the pore-foaming agent is a mixed solution of tetrahydrofuran and methylbenzene in a ratio of 3:1; adding azobisisobutyronitrile, then carrying out thermal-initiated polymerization at 60DEG C and reacting for 24h; after the reaction is ended, crushing and sieving a product; carrying out Soxhlet extraction with a mixed solution of methanol and glacial acetic acid in a volume ratio of 9:1 to remove the template molecule; and vacuum drying to obtain the phthalophos molecular imprinting polymer. The invention has the advantages of low cost, simple synthesis process and easily-controlled reaction conditions; and the prepared molecular imprinting polymer can be used for detecting residual phthalophos in the food, enriching the trace phthalophos and purifying a substrate and has high application value and broad market prospect in actual application.

Description

Technical field [0001] The present invention relates to the technical field of polymer materials, in particular to a preparation method of imimidophos molecularly imprinted polymer. Background technique [0002] Phthalophos (Phthalophos) belongs to the organophosphorus insecticide. It has low toxicity, broad spectrum, contact and stomach toxicity, and has a long residual effect. It has certain permeability to crops and can penetrate into the waxy layer of leaves. Mainly used in the prevention and control of crop diseases and insects such as cotton, rice, vegetables, tea trees, fruit trees, and forest trees. The main mechanism of action is to inhibit the enzymatic activity of cholinesterase in the organism, leading to metabolic disorders of acetylcholine, a transmission medium, and delayed neurotoxicity, causing dyskinesia, coma, paralysis of the respiratory center, paralysis and even death. As a typical enzyme poison, it can be ingested through the digestive tract, or absorbed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/14C08F2/44C08J9/26B01J20/30B01J20/26B01J20/28
Inventor 方国臻王俊平殷慧龄潘明飞王硕
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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