Preparation method and application of acephate molecularly imprinted polymer

An acephate, molecular imprinting technology, applied in chemical instruments and methods, water pollutants, water/sludge/sewage treatment, etc., to achieve the effects of simple preparation method, reduced harm, and simple regeneration method

Inactive Publication Date: 2016-03-30
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Preparation method and application of acephate molecularly imprinted polymer
  • Preparation method and application of acephate molecularly imprinted polymer
  • Preparation method and application of acephate molecularly imprinted polymer

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Embodiment 1

[0034] (1) Preparation of oil phase: Dissolve acephate (0.5mmol) in chloroform (0.5mL) solution, add methacrylic acid (MAA, 1.5mmol), mix well, and after standing for a certain period of time, add crosslinking agent Ethylene glycol dimethacrylate (EGDMA, 7.5 mmol) and initiator azobisisobutyronitrile (AIBN, 20 mg);

[0035] (2) Preparation of water phase: a certain amount of nano-silica particles (Nano-SiO 2 , 0.2g) into deionized water (6mL), ultrasonically dispersed;

[0036] (3) Preparation of Pickering emulsion: quickly transfer the oil phase prepared in step (1) to the water phase prepared in step (2), and adjust the pH with sodium hydroxide solution. After vigorous shaking, ultrasonic treatment forms Pickering emulsion;

[0037] (4) Preparation of molecularly imprinted polymerization: Pass the Pickering emulsion prepared in step (3) through N 2 (5min) Deoxygenate, seal, thermally initiate polymerization in a 60°C water bath for 16h, centrifuge the obtained polymer par...

Embodiment 2

[0040] (1) Preparation of oil phase: Dissolve acephate (1.0mmol) in chloroform (1.0mL) solution, add methacrylic acid (MAA, 3.0mmol), mix well, let stand for a certain period of time, then add cross-linking agent Ethylene glycol dimethacrylate (EGDMA, 15.0 mmol) and initiator azobisisobutyronitrile (AIBN, 20 mg);

[0041] (2) Preparation of water phase: a certain amount of nano-silica particles (Nano-SiO 2 , 0.4g) into deionized water (12mL), ultrasonically dispersed;

[0042] (3) Preparation of Pickering emulsion: quickly transfer the oil phase prepared in step (1) to the water phase prepared in step (2), and adjust the pH with sodium hydroxide solution. After vigorous shaking, ultrasonic treatment forms Pickering emulsion;

[0043] (4) Preparation of molecularly imprinted polymerization: Pass the Pickering emulsion prepared in step (3) through N2 (5min) Deoxygenate, seal, thermally initiate polymerization in a 60°C water bath for 16h, centrifuge the obtained polymer partic...

Embodiment 3

[0046] (1) Preparation of oil phase: Dissolve acephate (1.5mmol) in chloroform (1.5mL) solution, add methacrylic acid (MAA, 4.5mmol), mix well, and after standing for a certain period of time, add crosslinking agent Ethylene glycol dimethacrylate (EGDMA, 22.5 mmol) and initiator azobisisobutyronitrile (AIBN, 20 mg);

[0047] (2) Preparation of water phase: a certain amount of nano-silica particles (Nano-SiO 2 , 0.6g) into deionized water (18mL), ultrasonically dispersed;

[0048] (3) Preparation of Pickering emulsion: quickly transfer the oil phase prepared in step (1) to the water phase prepared in step (2), and adjust the pH with sodium hydroxide solution. After vigorous shaking, ultrasonic treatment forms Pickering emulsion;

[0049] (4) Preparation of molecularly imprinted polymerization: Pass the Pickering emulsion prepared in step (3) through N 2 (5min) Deoxygenate, seal, thermally initiate polymerization in a 60°C water bath for 16h, centrifuge the obtained polymer p...

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Abstract

The invention provides a preparation method and an application of an acephate molecularly imprinted polymer. The method comprises the following steps: polymerizing a template, a functional monomer, a crosslinking agent and an initiator by a Pickering emulsion method by using acephate as template molecules to obtain a molecularly imprinted polymer with template molecule acephate; and eluting and drying the molecularly imprinted polymer to obtain the acephate molecularly imprinted polymer without template. The molecularly imprinted polymer has high compatibility and selectivity on acephate, is simple in synthesis process, easily controllable in reaction condition and good in regeneration performance, and can be used for enriching/separating organophosphorus pesticide acephate residues in a water environment.

Description

technical field [0001] The invention relates to the field of molecular imprinting technology and the enrichment / separation technology of pesticide residues, in particular to a preparation method and application of acephate molecularly imprinted polymer particles. technical background [0002] Organophosphorus pesticides are the most widely used pesticides in my country. Since January 1, 2007, my country has banned methamidophos and other 5 kinds of medium and high toxicity organophosphorus pesticides. It is widely used in agricultural production practice as an alternative pesticide of methamidophos due to its advantages such as broad spectrum, long-lasting effect, and good field application effect. However, acephate still has residual risks in the environment (my country stipulates that the maximum residue limit of acephate in vegetables is 1mg / kg). Toxicological experiments have shown that acephate can cause neurological diseases after entering the human and animal bodies t...

Claims

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Application Information

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IPC IPC(8): C08F222/14C08F220/06C08J9/26C02F1/28C02F101/38
CPCC08F222/14C02F1/285C02F2101/38C08J9/26C08J2335/02C08F220/06
Inventor 段玉清罗孝平张海晖张迪任晓锋蔡梅红
Owner JIANGSU UNIV
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