Polyethyleneimine imprinted polymer probe and its preparation method and application

A polyethyleneimine, imprinted polymer technology, applied in fluorescence/phosphorescence, instruments, analytical materials, etc., can solve the problems of difficult separation and recovery, complicated operation, weak anti-interference ability, etc.

Active Publication Date: 2019-07-19
深圳市北研生态环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems of complex operation, weak anti-interference ability, and difficult separation and recovery in the current mixed metal ion pollution treatment process, the embodiment of the present invention provides a polyethyleneimine imprinted polymer probe and its preparation method

Method used

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  • Polyethyleneimine imprinted polymer probe and its preparation method and application
  • Polyethyleneimine imprinted polymer probe and its preparation method and application
  • Polyethyleneimine imprinted polymer probe and its preparation method and application

Examples

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preparation example Construction

[0045] As a preferred embodiment of the present invention, the preparation method of the polyethyleneimine imprinted polymer probe at least includes the following steps:

[0046] According to the ratio of polyethyleneimine: crosslinking agent: metal ion=(1~2) g: (1~1.5) g: (2.5~5) mmol, weigh the polyethyleneimine, crosslinking agent and Water-soluble metal salts;

[0047] Dissolving and mixing the polyethyleneimine and the water-soluble metal salt respectively, then raising the temperature to 60-100°C, and adding the cross-linking agent;

[0048] After adding the cross-linking agent, lye should be added to adjust the pH value to 9-11, and the reaction solution should be kept at 60-100°C for 2-5 hours;

[0049] Dialyze the reaction product until the conductivity of the dialysate is close to that of distilled water to obtain metal ion imprinted nanomaterials;

[0050] According to the mass ratio of the metal ion-imprinted nanomaterial:fluorescein=(4.5-5.5):1, the synthesis pr...

Embodiment 1

[0066] A preparation method of polyethylenimine imprinted polymer probe, comprising the following steps:

[0067] (1) Weigh 5gPEI, 3.025g copper nitrate trihydrate, 5gECHA, 0.1666g fluorescein respectively;

[0068] (2) Dissolve 3.025g of copper nitrate trihydrate in 30mL of water, add 5g of PEI and stir to dissolve, place the mixed solution in an ultrasonic cleaner and ultrasonically vibrate for 30min to achieve coordination equilibrium;

[0069] (3) Warm up the coordination balanced solution in (2) to 80°C, and add the prepolymer ECHA drop by drop with mechanical stirring;

[0070] (4) Adjust the pH of the reaction system to 10 with 1mol / L NaOH solution after 30 minutes of reaction after the dropwise addition, keep stirring at 80°C for 5 hours and then stop;

[0071] (5) Put the reaction product in (4) into a dialysis bag with a molecular cut-off of 100k, and repeatedly dialyze and wash with 1mol / L hydrochloric acid and ethylenediaminetetraacetic acid (EDTA) to wash away te...

Embodiment 2

[0077]The preparation method of Example 2 is the same as that of Example 1, except that the metal ion imprinting is zinc ion imprinting, and the water-soluble zinc salt used is zinc nitrate.

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Abstract

The invention provides a polyethyleneimine imprinted polymer probe, and a preparation method and application thereof. The polymer probe comprises cross-linking agent polymerized and modified polyethyleneimine and fluorescein grafted onto the polyethyleneimine, wherein the polyethyleneimine contains plural imprinting of metal ions. The probe has highly-specific metal ion identifiability, adsorptivity and anti-interference capability, can realize precise identification, detection and adsorption of target metal ions in mixed metal ions in a water body and is suitable for promotion and application to fields like water quality detection, metal ion identification, metal ion adsorption, etc.

Description

technical field [0001] The invention belongs to the technical field of fluorescent molecular probes of polymer composite materials, and in particular relates to a polyethylenimine imprinted polymer probe and a preparation method and application thereof. Background technique [0002] Since the development of heavy metal adsorption materials, the adsorption capacity, adsorption rate and regeneration performance have been greatly improved, but there are still poor anti-interference ability, lack of identification and selection ability for metal ions, which is not conducive to the identification of metal ion pollution types, Control of pollution detection and adsorption recovery of metal ions. Therefore, the development of functional materials with recognition and selective adsorption characteristics for heavy metal ions, and the rapid and specific identification and adsorption recovery of different metal types of pollutants are of great significance for the treatment of heavy m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/36C08J9/26C08L79/02C08L23/08G01N21/64
CPCC08J9/26C08J9/36C08J2379/02C08J2423/08C08L79/02G01N21/643C08L23/0869
Inventor 吴爱华贾晋栾胜基
Owner 深圳市北研生态环境科技有限公司
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