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A kind of preparation method of magnetic temperature-sensitive surface strontium ion imprinting adsorbent

An imprinted adsorption and temperature-sensitive technology, applied in chemical instruments and methods, alkali metal oxides/hydroxides, inorganic chemistry, etc., can solve the problems of low adsorption capacity, poor rigidity, etc.

Inactive Publication Date: 2015-08-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on this, temperature-sensitive molecularly imprinted gels have been reported, but their poor rigidity and low adsorption capacity limit their practical application.
However, there are no reports on the establishment of temperature-sensitive imprinted polymers on the surface of mesoporous materials, especially on the surface of magnetic composite mesoporous materials.

Method used

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  • A kind of preparation method of magnetic temperature-sensitive surface strontium ion imprinting adsorbent
  • A kind of preparation method of magnetic temperature-sensitive surface strontium ion imprinting adsorbent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Magnetic core Fe 3 o 4 preparation of

[0041] Weigh 0.675 g FeCl 3 ·6H 2 O was dissolved in 40 mL of ethylene glycol and stirred until a yellow homogeneous solution formed. Add 3.6 g of anhydrous sodium acetate (NaOAc) and 1.0 g of polyethylene glycol (PEG10000) to the above solution in turn, continue to stir for 30 min, then quickly transfer it to a 50 mL polytetrafluoroethylene autoclave, 200 o C for 8 h, cooled to room temperature, washed with ethanol, 60 o C dried overnight.

[0042] (2) Synthesis of PEI-SBA-15

[0043] Weigh 5.00 g of SBA-15 and 7 mL of γ-chloropropyltrimethoxysilane (CP) in 40 mL of xylene solution, slowly drop into 1.4 mL of deionized water, 80 o The reaction was carried out under the condition of C for 6 h, and the excess CP was washed with toluene to obtain the surface chloropropylated SBA-15 (CP-SBA-15). The prepared CP-SBA-15 (5.00 g) was added to 25 mL of 20% polyethyleneimine (PEI) aqueous solution, 90 o The reaction w...

Embodiment 2

[0054] (1) Magnetic core Fe 3 o 4 preparation of

[0055] Weigh 1.35 g FeCl 3 ·6H 2 O was dissolved in 40 mL of ethylene glycol and stirred until a yellow homogeneous solution formed. Add 3.6 g of anhydrous sodium acetate (NaOAc) and 1.0 g of polyethylene glycol (PEG10000) to the above solution in turn, continue to stir for 30 min, then quickly transfer it to a 50 mL polytetrafluoroethylene autoclave, 200 o C for 10 h, cooled to room temperature, washed with ethanol, 60 o C dried overnight.

[0056] (2) Synthesis of PEI-SBA-15

[0057] Weigh 5.00 g of SBA-15 and 14 mL of γ-chloropropyltrimethoxysilane (CP) in 40 mL of xylene solution, slowly drop into 2.0 mL of deionized water, 80 o The reaction was carried out under the condition of C for 6 h, and the excess CP was washed with toluene to obtain the surface chloropropylated SBA-15 (CP-SBA-15). The prepared CP-SBA-15 (5.00 g) was added to 50 mL of 20% polyethyleneimine (PEI) aqueous solution, 90 o The reaction ...

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Abstract

The invention relates to a preparation method of a magnetic temperature-sensitive surface strontium ion imprinted adsorbent, which belongs to the technical field of preparation of environmental functional materials. Firstly, the effective combination of Fe3O4 and aminated SBA-15 (PEI-SBA-15) was realized by the post-grafting method (Fe3O4PEI-SBA-15), and then the vinyl modification of Fe3O4PEI-SBA-15 was carried out to obtain Fe3O4PEI-SBA -15 MPS. Finally, using Fe3O4PEI-SBA-15MPS as the matrix and Sr(II) as the template, a magnetic temperature-sensitive surface strontium ion imprinted adsorbent was prepared, and its adsorption performance for Sr(II) was investigated. The adsorbent has remarkable thermal and magnetic stability, sensitive magnetic and thermal induction effects, remarkably reversible adsorption / release function with temperature, and obvious Sr(II) recognition performance.

Description

technical field [0001] The invention relates to a preparation method of a magnetic temperature-sensitive surface strontium ion imprinted adsorbent, which belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Molecular imprinting technology is a synthetic technology for the preparation of polymers with specific recognition performance (specific selectivity) for a specific template molecule (ion, molecule, complex, biomacromolecule or microorganism). Its core lies in the preparation of molecular imprinted polymer substances (MIPs). There are a large number of imprinted cavities of template molecules distributed inside MIPs, and these cavities are highly matched with template molecules in terms of spatial structure, binding sites, etc., so that molecularly imprinted polymers have specific recognition selectivity and excellent binding to template molecules. Affinity. When metal ions are directly used as template mole...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30
Inventor 刘燕陈瑞孟敏佳孟祥国宋志龙胡兆勇刘方方王娟
Owner JIANGSU UNIV
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