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Preparation method and application of sulfonylureas herbicide molecular surface engram separating film

A sulfonylurea, surface imprinting technology, applied in the field of molecular surface imprinting separation membrane, can solve the problems of low selectivity, reduced recognition ability, loss, etc., and achieves the effect of high recognition ability, improved performance and high selectivity

Inactive Publication Date: 2009-07-15
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the recognition between functional monomers and template molecules reported in the above documents or patents is based on hydrogen bonding, and a single hydrogen bonding has the problems of low selectivity and reduced or even lost recognition ability in the aqueous phase.
It can be seen that there are many deficiencies in the application of molecularly imprinted polymer materials based on hydrogen bonding interactions prepared by conventional methods in the detection of sulfonylurea herbicide residues.

Method used

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  • Preparation method and application of sulfonylureas herbicide molecular surface engram separating film
  • Preparation method and application of sulfonylureas herbicide molecular surface engram separating film

Examples

Experimental program
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Effect test

Embodiment 1

[0034] A circular polypropylene microporous membrane with a diameter of 45mm was immersed in a 0.1M methanol solution of azobisisobutyronitrile (AIBN) for 0.5 hour, and then it was taken out and left to air for 30 minutes to evaporate the solvent. Take 0.05g template molecule chlorsulfuron, 0.12g auxiliary functional monomer methacrylic acid (MAA), 0.25g alkenyl metalloporphyrin MMAZnTPP, 0.5g, cross-linking agent ethylene glycol dimethacrylate (EGDMA) and 2mL Dichloromethane was mixed in a glass reactor, and nitrogen gas was passed for 5 minutes, and then the above-mentioned polypropylene microporous membrane embedded with an initiator was immersed in the solution in the glass reactor, and moved into an oven at 60°C for surface graft polymerization 12 Hour. Adopt the mixed solution of methanol and glacial acetic acid (volume ratio 9:1) to wash the prepared surface grafted film, until no template molecule can be detected at the maximum absorption wavelength, then wash with met...

Embodiment 2

[0037] A circular polypropylene microporous membrane with a diameter of 45mm was immersed in a 0.1M methanol solution of azobisisobutyronitrile (AIBN) for 0.5 hour, and then it was taken out and left to air for 30 minutes to evaporate the solvent. Take 0.2g template molecule metsulfuron-methyl, 0.1g auxiliary functional monomer methacrylic acid (MAA), 0.2g alkenyl metalloporphyrin MMAZnTPP, 0.2g cross-linking agent ethylene glycol dimethacrylate (EGDMA) and 2mL dimethicone Methyl chloride was mixed in a glass reactor, nitrogen was passed for 5 minutes, and then the above-mentioned polypropylene microporous membrane embedded with the initiator was immersed in the solution in the glass reactor, and moved into a 60°C oven for surface graft polymerization for 12 hours . Adopt the mixed solution of methanol and glacial acetic acid (volume ratio 9:1) to wash the prepared surface grafted film, until no template molecule can be detected at the maximum absorption wavelength, then wash ...

Embodiment 3

[0040]A circular polypropylene microporous membrane with a diameter of 45mm was immersed in a 0.1M methanol solution of azobisisobutyronitrile (AIBN) for 0.5 hour, and then it was taken out and left to air for 30 minutes to evaporate the solvent. Take 0.04g template molecule tribenuron-methyl, 0.4g auxiliary functional monomer methacrylic acid (MAA), 0.8g alkenyl metalloporphyrin MMAZnTPP, 0.8g cross-linking agent ethylene glycol dimethacrylate (EGDMA) and 5mL Dichloromethane was mixed in a glass reactor, and nitrogen gas was passed for 5 minutes, and then the above-mentioned polypropylene microporous membrane embedded with an initiator was immersed in the solution in the glass reactor, and moved into an oven at 60°C for surface graft polymerization 12 Hour. Adopt the mixed solution of methanol and glacial acetic acid (volume ratio 9:1) to wash the prepared surface grafted film, until no template molecule can be detected at the maximum absorption wavelength, then wash with met...

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Abstract

The invention discloses a preparation method of a sulfonylurea herbicide molecular surface imprinting separation membrane, which comprises: (1) putting a microporous polypropylene membrane into an initiator solution for immersion and air drying to get the microporous polypropylene membrane with the initiator being embedded in the surface; (2) mixing an auxiliary function monomer, alkenyl metalloporphyrin, glycol dimethacrylate, dichloromethane and imprinting molecule in a reactor; (3) immersing the microporous polypropylene membrane with the initiator being embedded in the surface gotten by the step (1) into the reactor of the step (2) for membrane surface graft polymerization to get a surface graft membrane; (4) washing the surface graft membrane in an eluent to remove each residual monomer and imprinting molecule and drying to get the sulfonylurea herbicide molecular surface imprinting separation membrane. The sulfonylurea herbicide molecular surface imprinting separation membrane prepared by the invention is characterized by high selectivity and high sensitivity.

Description

technical field [0001] The invention relates to molecular surface imprinted separation membrane technology. Specifically relates to a preparation method and application of a sulfonylurea herbicide molecular surface imprinted separation membrane. Background technique [0002] Sulfonylurea herbicides are a class of high-efficiency herbicides developed in the past 30 years, and are widely used in cereal crops to control broad-leaved weeds and some grass weeds. This type of herbicide has high activity and high selectivity, and some varieties have a longer residual effect period, and a small amount of its residue in the soil can cause phytotoxicity to subsequent sensitive crops. Therefore, the extraction, separation and effective detection of sulfonylurea herbicide residues are extremely important. Molecular Imprinting Technique (Molecular Imprinting Technique) shows good application prospects in the separation and detection of pesticide residues due to its unique predestinatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/78
Inventor 万灵书吴健仰云峰曾庆斌徐志康
Owner ZHEJIANG UNIV