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Molecularly imprinted polymer and preparation method and application thereof

A technology of molecular imprinting and polymers, applied in textiles and papermaking, fiber raw material treatment, paper coating, etc., can solve the problems of short slow-release time and unfavorable slow-release, and achieve good fresh-keeping performance

Active Publication Date: 2013-03-20
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its slow-release time is relatively short, after 5 days, the sustained-release is stable, which is not conducive to long-term sustained-release

Method used

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  • Molecularly imprinted polymer and preparation method and application thereof
  • Molecularly imprinted polymer and preparation method and application thereof
  • Molecularly imprinted polymer and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh 5g of β-cyclodextrin and dissolve in 50mL of dimethyl sulfoxide solution, add 0.2mL of allyl isothiocyanate and stir magnetically at 45°C for 6h. Sonicate for 10 minutes to mix well, then remove the air in the liquid, pass through nitrogen protection, and add 3mL 2,4-toluene diisocyanate, and stir at constant temperature for 24 hours at 65°C under nitrogen protection. Cool to room temperature, add stirred acetone to precipitate the molecularly imprinted polymer from the solution, vacuum filter and wash the precipitate repeatedly with acetone and hot water at 50°C, respectively, to elute unreacted cross-linking agent and monomer molecules. Grind finely after vacuum drying and store dryly.

[0038] The yield of the obtained polymer was 53.13%, and the AITC content was 40.45 μl / g.

[0039]

Embodiment 2

[0041] Weigh 5g of β-cyclodextrin and dissolve in 150mL of dimethyl sulfoxide solution, add 0.3mL of allyl isothiocyanate and stir magnetically at 45°C for 6h. Sonicate for 10 minutes to mix well, then remove the air in the liquid, pass through nitrogen protection, and add 4mL of 2,4-toluene diisocyanate, and stir at constant temperature for 24 hours at 65°C under nitrogen protection. Cool to room temperature, add stirred acetone to precipitate the molecularly imprinted polymer from the solution, vacuum filter and wash the precipitate repeatedly with acetone and hot water at 50°C, respectively, to elute unreacted cross-linking agent and monomer molecules. Grind finely after vacuum drying and store dryly.

[0042] The yield of the obtained polymer was 53.97%, and the AITC content was 49.14 μl / g.

[0043]

Embodiment 3

[0045] Sustained-release effect of allyl isothiocyanate molecularly imprinted polymer under different humidity conditions

[0046] Weigh 5g of β-cyclodextrin and dissolve in 100mL of dimethyl sulfoxide solution, add 0.4mL of allyl isothiocyanate and stir magnetically at 45°C for 6h. Sonicate for 10 minutes to mix well, remove the air in the liquid, pass through nitrogen protection, add 5mL 2,4-toluene diisocyanate, and stir at 65°C for 24 hours under nitrogen protection. Cool to room temperature, add stirred acetone to precipitate the molecularly imprinted polymer from the solution, vacuum filter and wash the precipitate repeatedly with acetone and hot water at 50°C, respectively, to elute unreacted cross-linking agent and monomer molecules. Grind finely after vacuum drying and store dryly.

[0047] The yield of the obtained polymer was 65.02%, and the AITC content was 53.66 μl / g.

[0048] Weigh about 2.0 g of the prepared molecularly imprinted polymer, spread it evenly on t...

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Abstract

The invention relates to a molecularly imprinted polymer which is an allyl isothiocyanate slow-release polymer synthesized by using allyl isothiocyanate as template molecule and beta-cyclodextrin as functional monomer. The obtained polymer is a new molecularly imprinted polymer having good slow-release properties, so as to provide a feasible preparation approach to the synthesis of allyl isothiocyanate molecularly imprinted polymers. Meanwhile, the prepared allyl isothiocyanate molecularly imprinted polymer is applied to the preservation field, and preservative paper made of the allyl isothiocyanate molecularly imprinted polymer has good preservative properties, which provides a feasible basis for the application of allyl isothiocyanate molecularly imprinted polymers in the preservation field.

Description

technical field [0001] The invention relates to a molecularly imprinted polymer, its preparation method and application, and relates to an allyl isothiocyanate slow-release preservative and its preparation and application. The slow release of allyl isothiocyanate can be used in the field of food preservation. [0002] Background technique [0003] Molecularly imprinted polymers are polymers that match a specific compound (template molecule) at the binding site and chemical space structure [1] . The method of preparing this polymer is molecular imprinting technology. Molecular imprinting technology is an analysis and separation technology developed by artificially simulating the specific interaction between antigen-antibody, biotin-anti-biotin, enzyme and substrate, etc. It is mainly used in the separation of chiral substances [2,3] , bionic sensor [4] Solid Phase Extraction [5,6] and other fields. With the continuous maturity of molecular imprinting technology, in re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/76C08G18/64C08J9/28D21H19/14D21H19/24
Inventor 朱秋劲陆宽黄运安武剑
Owner GUIZHOU UNIV
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