Preparation of an ion-imprinted polymer based on ribonucleotide functional monomers

A technology of ribonucleotides and functional monomers, which is applied in the field of preparation of ion-imprinted polymers, can solve the problems of poor adsorption and dissociation performance, and achieve the effects of improving selectivity, mild reaction conditions, and avoiding performance differences

Active Publication Date: 2022-08-05
UNIV OF SHANGHAI FOR SCI & TECH
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing ion-imprinted polymers based on ribonucleotide functional monomers, so as to overcome the problems of poor adsorption and dissociation performance of existing ion-imprinted polymers due to differences in preparation and application environments

Method used

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  • Preparation of an ion-imprinted polymer based on ribonucleotide functional monomers
  • Preparation of an ion-imprinted polymer based on ribonucleotide functional monomers
  • Preparation of an ion-imprinted polymer based on ribonucleotide functional monomers

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Embodiment 1

[0021] Preparation of As(Ⅲ) ion-imprinted polymers

[0022] 1) The preparation of the imprinted carrier, add 300ml of absolute ethanol to the beaker, then add 125ml of double distilled water, add 25ml of tetraethoxysilane while magnetic stirring at 450rpm, and finally add 15ml of ammonia water with a mass concentration of 25% quickly, and continue the magnetic Stir for 8h, after the reaction, centrifuge at 5000rpm for 10min to collect the product, wash the precipitate three times with absolute ethanol, collect the sample by centrifugation, and dry at 70°C to obtain nano-silica;

[0023] 2) Preparation of ion-imprinted polymer, dissolve 1 mmol of sodium arsenite in 45 ml of double distilled water, then add 2 mmol of guanine ribonucleotides, and stir at 500 rpm for 1 h. In the above solution, add 2mmol 3-aminophenylboronic acid, use 50mmol / L sodium hydroxide to adjust the pH of the solution to 8.2, after nitrogen and oxygen removal, add 1g nano-silica prepared in step 1) and 5ml...

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Abstract

The present invention provides a method for preparing an ion-imprinted polymer based on functional monomers of ribonucleotides, which is characterized by comprising: dissolving inorganic salts of template ions in double distilled water, then adding ribonucleotides, at 450-550 rpm Stir for 1~2h, add aminophenylboronic acid to the above solution, use 50-100mmol / L sodium hydroxide to adjust the pH of the solution to 8-10, pass nitrogen and deoxygenate, add nano-silica and 0.05~0.2mol / L permeate. Ammonium sulfate solution, nitrogen blowing for 20-40min, continuous magnetic stirring reaction for 10-14h, after the reaction is over, centrifuge to collect the product, use 50-100mmol / L sulfhydryl-containing compound to elute the template ion, then use double distilled water to wash, centrifuge The product was collected and dried at 60-80°C to obtain an ion-imprinted polymer based on ribonucleotide functional monomer. In the preparation process of the present invention, ribonucleotides with good affinity for metal ions are selected as functional monomers, and the selectivity of ion imprinting can be further improved through the synergistic effect of the imprinting monomer and the imprinting cavity.

Description

technical field [0001] The invention relates to the preparation of an ion-imprinted polymer based on ribonucleotide functional monomers, and belongs to the technical field of functional material preparation. Background technique [0002] Molecular Imprinted Technology (Molecular Imprinted Technology) is a kind of selective recognition cavity for different ions constructed by specific coordination or electrostatic interaction on the basis of molecular imprinting. Compared with molecular imprinting, the force of complex formation in ion imprinting in aqueous environment is much greater than that of intermolecular hydrogen bonds, so it has better ion recognition ability. [0003] At present, the preparation of ion imprinting mostly relies on the complexation / coordination between template ions and functional monomers with lone pair electrons. However, most ions have the same charge or similar ionic radius, and the prepared ion-imprinted polymers are less selective. On the othe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30
Inventor 徐斐叶泰袁敏曹慧于劲松
Owner UNIV OF SHANGHAI FOR SCI & TECH
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