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Preparation method of dendritic macromolecule modified magnetic attapulgite surface imprinted polymer

A technology of dendritic macromolecule and attapulgite, applied in the direction of alkali metal compounds, chemical instruments and methods, alkali metal oxides/hydroxides, etc., can solve the problems of adsorption saturation and small adsorption capacity, and achieve high specific surface area , increase the loading capacity and avoid the effect of desorption phenomenon

Active Publication Date: 2020-01-14
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to overcome the problem that the adsorption capacity of imprinted polymer adsorption templates is small and easy to reach adsorption saturation in the prior art, and provides a preparation method for imprinted polymers on the surface of magnetic attapulgite modified by dendritic macromolecules

Method used

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  • Preparation method of dendritic macromolecule modified magnetic attapulgite surface imprinted polymer

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Embodiment 1

[0021] The preparation method of the magnetic attapulgite surface imprinted polymer modified by dendrimers comprises the following steps:

[0022] 1) Preparation of magnetic attapulgite nanoparticles: Add 3 g of attapulgite nanoparticles into 200 mL of deionized water for ultrasonic dispersion, add 10 mL of FeCl with a concentration of 0.25 mol / L 3 solution and 5 mL of FeCl with a concentration of 0.45 mol / L 2 solution, adding dropwise a sodium hydroxide solution with a concentration of 10 wt% to adjust the pH to 10.5, ultrasonically reacting for 3 hours, centrifuging, washing, and drying to obtain magnetic attapulgite nanoparticles;

[0023] 2) Alkylation treatment: Add magnetic attapulgite nanoparticles to 150 mL of toluene solution of KH550 epoxy silane coupling agent with a concentration of 20wt%, raise the temperature to 35°C, and keep warm for 2 hours to obtain alkylated magnetic attapulgite nanoparticles. particles;

[0024] 3) Grafting: Add polypropyleneimine to deio...

Embodiment 2

[0027] The preparation method of the magnetic attapulgite surface imprinted polymer modified by dendrimers comprises the following steps:

[0028] 1) Preparation of magnetic attapulgite nanoparticles: Add 3 g of attapulgite nanoparticles to 200 mL of deionized water for ultrasonic dispersion, add 10 mL of FeCl with a concentration of 0.3 mol / L 3 solution and 5 mL of FeCl with a concentration of 0.45 mol / L 2 solution, adding dropwise a sodium hydroxide solution with a concentration of 10 wt% to adjust the pH to 11, ultrasonically reacting for 4 hours, centrifuging, washing, and drying to obtain magnetic attapulgite nanoparticles;

[0029] 2) Alkylation treatment: Add magnetic attapulgite nanoparticles to 150 mL of toluene solution of KH550 epoxy silane coupling agent with a concentration of 20wt%, raise the temperature to 35°C, and keep warm for 2 hours to obtain alkylated magnetic attapulgite nanoparticles. particles;

[0030] 3) Grafting: Add polypropyleneimine to deionized...

Embodiment 3

[0033] The preparation method of the magnetic attapulgite surface imprinted polymer modified by dendrimers comprises the following steps:

[0034] 1) Preparation of magnetic attapulgite nanoparticles: Add 3 g of attapulgite nanoparticles to 200 mL of deionized water for ultrasonic dispersion, add 10 mL of FeCl with a concentration of 0.2 mol / L 3 solution and 5 mL of FeCl with a concentration of 0.5 mol / L 2 solution, adding dropwise a sodium hydroxide solution with a concentration of 10 wt% to adjust the pH to 10, ultrasonically reacting for 3 hours, centrifuging, washing, and drying to obtain magnetic attapulgite nanoparticles;

[0035] 2) Alkylation treatment: Add magnetic attapulgite nanoparticles to 150 mL of toluene solution of KH550 epoxy silane coupling agent with a concentration of 20wt%, raise the temperature to 30°C, and keep warm for 2 hours to obtain alkylated magnetic attapulgite nanoparticles. particles;

[0036] 3) Grafting: Add polypropyleneimine to deionized ...

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Abstract

The invention relates to the technical field of molecular imprinting, and discloses a preparation method of magnetic attapulgite surface imprinted polymer modified by dendritic macromolecules. The preparation method comprises the following steps: 1) preparing magnetic attapulgite nanoparticles; 2) alkylating that magnetic attapulgite nanoparticles; 3) grafting: adding alkylate magnetic attapulgitenanoparticles into polypropylene imine solution, stirring and reacting to obtain polypropylene imine magnetic attapulgite nanoparticles; 4) preparing imprinted polymer: mixing template molecules, polypropylene imine magnetic attapulgite nanoparticles and acetonitrile, standing, separating solid particles, adding solid particles, functional monomer, crosslinking agent and initiator into acetonitrile, stirring, reacting, magnetically separating and drying, washing template molecules through Soxhlet extraction, separating and drying. The magnetic attapulgite surface imprinted polymer prepared bythe invention has the characteristics of large adsorption capacity and no easy desorption.

Description

technical field [0001] The invention relates to the technical field of molecular imprinting, in particular to a method for preparing dendrimer-modified magnetic attapulgite surface-imprinted polymers. Background technique [0002] Molecular imprinting technology is a technology for preparing polymers with specific recognition properties for target molecules, and surface molecular imprinting is one of the current research focuses in the field of molecular imprinting technology. Molecular imprinting technology is a new technology for preparing polymers with molecular recognition ability, but there are still some serious defects, such as incomplete removal of template molecules, low utilization of active sites, poor adsorption-desorption performance, poor mechanical properties, etc. Surface molecular imprinting technology can better solve the limitations of traditional molecular imprinting technology by establishing molecular recognition sites on the surface of matrix materials...

Claims

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Application Information

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IPC IPC(8): C08F283/00C08F220/06C08F2/44C08K9/12C08K9/06C08K3/34C08K3/22B01J20/26B01J20/28B01J20/30
CPCC08F283/00C08F2/44C08K9/12C08K9/06C08K3/346C08K3/22B01J20/261B01J20/28009B01J20/12B01J20/0229C08K2003/2275C08K2201/011C08K2201/01C08F220/06
Inventor 郁迪欧阳小琨黄芳芳杨立业孙骁潇
Owner ZHEJIANG OCEAN UNIV
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