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A temperature-sensitive polymer-wrapped metal-organic framework magnetic material and its application

A technology of metal-organic frameworks and magnetic materials, which is applied to the magnetism of organic materials/organic magnetic materials, material separation, and analysis of materials. It can solve the problems of complex samples with large interference, poor selectivity and specificity, and prone to false positive results. , to achieve the effect of avoiding secondary pollution, low detection limit, simple and fast separation and elution process

Active Publication Date: 2016-11-30
SHANDONG ANALYSIS & TEST CENT
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  • Claims
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Problems solved by technology

However, the selectivity and specificity of gas chromatography or gas chromatography-mass spectrometry are relatively poor, and the interference to complex samples is relatively large, and false positive results are prone to occur.

Method used

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  • A temperature-sensitive polymer-wrapped metal-organic framework magnetic material and its application
  • A temperature-sensitive polymer-wrapped metal-organic framework magnetic material and its application
  • A temperature-sensitive polymer-wrapped metal-organic framework magnetic material and its application

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] (1) 1.35g ferric chloride hexahydrate (FeCl 3 ·6H 2O) Dissolve in 50mL of ethylene glycol, stir until clear, then slowly add 3.6g of sodium acetate (NaAC), and continue stirring for 30 minutes. After that, it was transferred to a reaction kettle and reacted at 200°C for 8 hours. After the reaction kettle was lowered to normal temperature, a black product was obtained under the action of an external magnetic field, washed several times with deionized water and ethanol, and dried overnight at 60°C;

[0028] (2) 20mg of synthetic Fe 3 o 4 Ultrasonic dispersion in 20mL ethanol, add 4mL H 2 O and 100 μL ammonia water continued to sonicate for 30 minutes, and then 100 μL tetraethylorthosilicate (TEOS) was added to continue sonicating for 5 hours. Product Fe 3 o 4 @SiO 2 Separated under the action of an external magnetic field, washed several t...

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Abstract

The invention discloses a temperature-sensitive polymer-coated metal organic framework magnetic material and application thereof. A temperature-sensitive polymer and a magnetic material are introduced into a metal organic framework, and the obtained composite material has a high specific surface area and can realize enrichment and separation of target pollutants; through introduction of magnetic ferriferrous oxide, enrichment and separation become more convenient and faster under the action of an applied magnetic field, so time for enrichment is substantially shortened, and an adsorbent material can be easily recovered for cyclic usage; and through introduction of the temperature-sensitive polymer, the prepared material has hydrophilic groups on the surface, which enables dispersibility and stability of the material in water to be improved, and temperature-sensitive changes unique to the polymer enable the adsorbent material to have high enrichment efficiency to the target pollutants at low temperature, volatilization of organic solvents in the process of extraction and elution to be reduced and secondary pollution to the environment to be reduced.

Description

technical field [0001] The invention relates to a temperature-sensitive polymer-wrapped metal organic framework magnetic material and its application. Background technique [0002] Polybrominated diphenyl ethers (PBDEs) can be divided into ten homologous groups according to the number of bromine atoms, and there are 209 homologue isomers, which are persistent, hydrophobic and bioaccumulative. Due to its cheap and efficient flame retardant properties, it is widely used in the production of the electronics industry, but PBDEs do not have a chemical bond between the product and the material, so they are inevitably released to the environment during production, transportation and use middle. Their chemical properties are extremely stable, it is difficult to be degraded by organisms in the environment, and they can remain in various ways, eventually leading to global pollution. Therefore, the enrichment and detection of PBDEs in the environment are very important. [0003] At p...

Claims

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Application Information

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IPC IPC(8): B01J20/22B01J20/28B01J20/30B01J20/292B01J20/285B01J20/286H01F1/42H01F41/02G01N30/02
CPCB01J20/226B01J20/28009B01J20/285B01J20/286B01J20/292B01J20/30G01N30/02G01N2030/025H01F1/42H01F41/02
Inventor 陈相峰贾玉倩苏浩曹莹莹
Owner SHANDONG ANALYSIS & TEST CENT
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