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Preparation method of phthalate magnetic molecularly imprinted polymer extraction material

A technology of phthalic acid and imprinted polymers, applied in alkali metal compounds, chemical instruments and methods, water pollutants, etc., can solve problems such as increasing the cost of environmental samples, interference in chromatographic analysis, and poor selectivity of fillers

Pending Publication Date: 2022-03-08
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Traditional solid-phase extraction often uses solid-phase extraction cartridges such as C18 and HLB for extraction, but the fillers in these extraction cartridges have poor selectivity and cannot be reused. When extracting complex environmental samples, there are a large number of impurities. Chromatographic analysis is interfering and increases the cost of environmental sample processing

Method used

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  • Preparation method of phthalate magnetic molecularly imprinted polymer extraction material
  • Preparation method of phthalate magnetic molecularly imprinted polymer extraction material
  • Preparation method of phthalate magnetic molecularly imprinted polymer extraction material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) Weigh 2.2500g urea and 0.8325g CTAB and add them into 140mL of deionized water and ultrasonically to a clear solution, continue to add 3.6000g (NH4)2Fe(SO4)2·6H2O and stir, add 0.6674g Ni ( NO3)2·6H2O and 0.6827g Zn(NO3)2·6H2O were stirred for 10min, then transferred to a 200mL hydrothermal reactor, and reacted at 160°C for 6h. The obtained Ni0.5Zn0.5Fe2O4 magnetic core was washed three times with ethanol and deionized water respectively, the product was collected by a magnet, and dried in vacuum at 80°C for 12h.

[0036](2) Weigh 700 mg of the magnetic nucleus synthesized in step (1) and ultrasonically disperse it in a mixed solution of 50 mL of deionized water and ethanol (1:4, V / V). Ethyl silicate was stirred at room temperature for 6 hours. The obtained product was separated by a magnet, washed three times with ethanol and deionized water, and dried in vacuum at 50°C for 12 hours to obtain Ni0.5Zn0.5Fe2O4@SiO2 nanoparticles.

[0037] (3) Add 5mL of 3-aminopropy...

Embodiment 2

[0053] The difference from Example 1 is that the molar ratio of the template molecule (dimethyl phthalate or dipropyl phthalate) to the functional monomer (methacrylic acid) is 1:2, and the functional monomer and crosslinking agent, the molar ratio of the functional monomer to the crosslinking agent is the same as in Example 1, the molar ratio of the template molecule, the functional monomer to the crosslinking agent is 1:2:10, and the rest are the same as in Example 1.

Embodiment 3

[0055] The difference from Example 1 is that the molar ratio of the template molecule (dimethyl phthalate or dipropyl phthalate) to the functional monomer (methacrylic acid) is 1:6, and the functional monomer and crosslinking Agent, the molar ratio of functional monomer and crosslinking agent is the same as in Example 1, the molar ratio of template molecule, functional monomer and crosslinking agent is 1:6:30, and the rest are the same as in Example 1.

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Abstract

The invention belongs to the new technical field of sample pretreatment and enrichment, and provides a preparation method of a dimethyl phthalate magnetic molecularly imprinted polymer extraction material, which comprises the following steps: preparing a Ni0. 5Zn0. 5Fe2O4 magnetic core by adopting a hydrothermal method, modifying the magnetic core by using tetraethoxysilane (TEOS) and 3-(methacryloyloxy) propyltrimethoxysilane (MPS), and preparing the dimethyl phthalate magnetic molecularly imprinted polymer extraction material. Then preparing phthalate magnetic template molecularly imprinted polymers (DMP-MMIPs) by adopting a precipitation polymerization method and taking dipropyl phthalate (DPRP) as a template molecule, methacrylic acid (MAA) as a functional monomer, ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent and azodiisobutyronitrile (AIBN) as an initiator; the dimethyl phthalate adsorption capacity of the prepared phthalate magnetic molecularly imprinted polymer can reach 2.50 mg / g or above, and the phthalate magnetic molecularly imprinted polymer can be applied to targeted enrichment and extraction of phthalate organic matters in an environmental water sample.

Description

technical field [0001] The invention relates to the field of sample pretreatment and enrichment technology, in particular to a preparation method of a phthalate-based magnetic molecular imprinted polymer extraction material. Background technique [0002] Phthalates (PAEs), as the most commonly used plasticizers in the world, are used in flexible adhesives and sealants in food packaging materials, medical blood bags and hoses, vinyl floors and wallpapers, waterproof membranes, power cables Found in insulating protective covers, pool liners, waterproof shoes and garden hoses, and more. Phthalates play a role similar to estrogen in humans and animals, can interfere with endocrine, and reduce the amount of semen and sperm in men. Therefore, the preparation of solid-phase extraction materials with targeted adsorption and enrichment functions for phthalates in the environment is an important application direction in the field of environmental analysis. [0003] Molecularly impri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28C08F222/14C08F220/06B01J20/30C02F101/34
CPCB01J20/06B01J20/103B01J20/268B01J20/28009C08F222/102C02F1/281C02F1/285C02F2101/34C08F220/06
Inventor 李陆天沈翔秦雨昕李继勇
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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