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Fulvic acid-based magnetic ion-imprinted polymer and preparation method thereof

A technology for imprinting polymers and magnetic ions, which is applied in the fields of alkali metal compounds, chemical instruments and methods, and other chemical processes. It can solve problems such as difficult reuse, no industrial promotion value, deep ion embedding, etc., and achieves good results. , Excellent selective recognition performance, fast adsorption effect

Inactive Publication Date: 2018-10-19
NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using fulvic acid directly as an adsorption material has problems such as deep ion embedding and difficulty in reusing, and it does not have industrial promotion value.

Method used

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  • Fulvic acid-based magnetic ion-imprinted polymer and preparation method thereof
  • Fulvic acid-based magnetic ion-imprinted polymer and preparation method thereof
  • Fulvic acid-based magnetic ion-imprinted polymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Fe was prepared by the following steps 3 o 4 / SiO 2 Composite magnetic particles:

[0027] a) Preparation of Fe by co-precipitation method 3 o 4 Nanoparticles: FeSO 4 ·7H 2 O and FeCl 3 ·6H 2 O is dissolved in a water solvent with nitrogen as a protective gas at a molar ratio of 1:2.0, stirred and dissolved at a constant temperature; the temperature is raised to 60°C, and NH is added under rapid stirring.3 ·H 2 O; continue to heat up to 90 °C, react for 30 min, wash with distilled water and absolute ethanol alternately, and then separate Fe 3 o 4 Nanoparticles (denoted as Fe 3 o 4 ).

[0028] b) Using the sol-gel method on the Fe 3 o 4 Si-O-Si structure wrapped on the surface of nanoparticles: take 0.4 g of Fe prepared in step a) 3 o 4 Nanoparticles were dispersed in 100 mL of ethanol / water mixed solvent (volume ratio 4:1), 1 mL of ammonia water and 1.5 mL of ethyl orthosilicate were added under mechanical stirring, and stirred at room temperature for 6 ...

Embodiment 2

[0030] Fulvic acid-based magnetic ionically imprinted polymer, Fe 3 o 4 / SiO 2 The composite magnetic particle is a core-shell structure in which the magnetic core is coated with a functional shell; the functional shell is an ion-imprinted polymer obtained by cross-linking the functional monomer of fulvic acid with metal ions as a template.

Embodiment 3

[0032] The preparation method of fulvic acid-based magnetic ion imprinting polymer comprises the following steps:

[0033] 1) Using surface imprinting technology, using fulvic acid as a functional monomer, using metal ions as a template, under the action of cross-linking agent KH-560, on Fe 3 o 4 / SiO 2 Composite magnetic particles coated with fulvic acid cross-linked polymer: Take 35 mL of fulvic acid solution with a concentration of 0.01 g / mL and 14 mL of NiCl with a concentration of 0.03 g / mL 2 ·6H 2 O solution was mixed, and 1.6 mL of cross-linking agent KH-560 was added, and after stirring evenly, 0.6 g of the prepared Fe 3 o 4 / SiO 2 Composite magnetic particles were mechanically stirred at 70 °C for 24 h after ultrasonic oscillation for 10 min.

[0034] 2) The product obtained in step 1) is washed with distilled water, put into disodium ethylenediaminetetraacetic acid (EDTA disodium salt) with a concentration of 0.25 mol / L, and soaked to desorb the metal ion Ni 2...

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Abstract

Belonging to the technical field of ion imprinting, the invention provides a fulvic acid based magnetic ion imprinted polymer and a preparation method thereof. Specifically, the fulvic acid based magnetic ion imprinted polymer has a core-shell structure with Fe3O4 / SiO2 composite magnetic particles as the magnetic core, and the magnetic core is coated with a functional shell. The functional shell is an ion imprinted polymer that adopts metal ion as the template and is obtained by crosslinking of a fulvic acid functional monomer. The product has the characteristics of stable structure, excellent selective recognition performance, fast adsorption of template ions, large adsorption capacity, reusability, and good magnetic separation effect. The preparation method comprises the steps of: 1) adopting a surface imprinting technique, taking fulvic acid as the functional monomer and metal ions as the template, under the action of a cross-linking agent, coating a Fe3O4 / SiO2 composite magnetic particle surface with a fulvic acid crosslinked polymer; and 2) desorbing the metal ions to obtain the fulvic acid based magnetic ion imprinted polymer. The method has the advantages of simple process, low cost and small environmental pollution, and is convenient for intra-industry popularization and application.

Description

technical field [0001] The invention belongs to the technical field of ion imprinting, and in particular relates to a fulvic acid-based magnetic ion imprinting polymer and a preparation method thereof. Background technique [0002] Ion imprinted polymer is a new type of polymer material with ion recognition performance, which has the ability to quickly select and identify template ions. In recent years, ion-imprinted polymers have been used in the fields of solid-phase extraction, chromatographic analysis, electrochemical sensors, and drug analysis, especially surface ion-imprinted polymers and their applications, which are research hotspots. [0003] In addition to having a large specific surface area, nanometer ferroferric oxide also has superparamagnetism, and is easy to magnetize under the action of an external magnetic field, and the residual magnetism is zero after the external magnetic field disappears. Nano Fe 3 o 4 As the core and the organic polymer material as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
CPCB01J20/268B01J20/28009B01J20/28026
Inventor 尚宏周闫莉张鑫何俊男赵敬东孙晓然
Owner NORTH CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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