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Preparation method of magnetic attapulgite surface imprinted hydrophilic nanocomposite

A technology of nanocomposite materials and attapulgite, applied in chemical instruments and methods, magnetic/electric field water/sewage treatment, alkali metal compounds, etc., to achieve uniform distribution, uniform size, and excellent regeneration performance

Inactive Publication Date: 2015-12-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the preparation and application of most molecularly imprinted polymers are limited to organic solvents, and the natural recognition system and the actual application environment of molecularly imprinted polymers are mostly aqueous systems. Therefore, the development of hydrophilic imprinted materials for Aqueous phase recognition system is a research target in the field of molecular imprinting

Method used

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  • Preparation method of magnetic attapulgite surface imprinted hydrophilic nanocomposite
  • Preparation method of magnetic attapulgite surface imprinted hydrophilic nanocomposite
  • Preparation method of magnetic attapulgite surface imprinted hydrophilic nanocomposite

Examples

Experimental program
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Effect test

Embodiment 1

[0031] (1) Preparation of magnetic attapulgite

[0032] According to the mass ratio of ethanol: attapulgite (ATPs): ferric nitrate nonahydrate is 20:0.5:0.4 (g / g / g), add ethanol, attapulgite and ferric nitrate nonahydrate successively to the flask, ultrasonic Disperse evenly, stir magnetically at room temperature for 12h, place at 60 o C oven dry. After grinding, put it into a magnetic boat, add a sufficient amount of ethylene glycol (EG) dropwise, fully soak for 12 hours, and heat it in a tube furnace at 3.0 o C / min heating up to 300 o C, maintaining the temperature for calcination for 1.0 h, and the calcined product was washed with ethanol several times, and then dried to constant weight to obtain magnetic attapulgite (MATPs).

[0033] (2) Preparation of vinyl-functionalized magnetic attapulgite

[0034] According to the ratio of magnetic attapulgite: 3-(methacryloyloxy)propyltrimethoxysilane (KH570): toluene mass ratio of 1.0:1.0:100 (g / g / g), add to the three-necked fla...

Embodiment 2

[0040] (1) Preparation of magnetic attapulgite

[0041] According to the ratio of ethanol: attapulgite (ATPs): ferric nitrate nonahydrate mass ratio of 20:2.0:1.0 (g / g / g), add ethanol, attapulgite and ferric nitrate nonahydrate to the flask successively, ultrasonic Disperse evenly, stir magnetically at room temperature for 18h, place at 80 o C oven dry. After grinding, put it into a magnetic boat, add a sufficient amount of ethylene glycol (EG) dropwise, and fully soak for 12 hours. o C / min heating up to 500 o C, maintaining the temperature for calcination for 3.0 h, and the calcined product was washed with ethanol several times, and then dried to constant weight to obtain magnetic attapulgite (MATPs).

[0042] (2) Preparation of vinyl-functionalized magnetic attapulgite

[0043] According to the ratio of magnetic attapulgite: 3-(methacryloyloxy)propyltrimethoxysilane (KH570): toluene mass ratio of 1.0:3.0:100 (g / g / g), add to the three-necked flask in sequence Magnetic at...

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Abstract

The present invention relates to a magnetic attapulgite surface imprinting hydrophilic nanometer composite material preparation method, and belongs to the technical field of environmental function material preparation. According to the preparation method, an impregnation method and a high temperature reduction method are adopted to synthesize a magnetic attapulgite nanometer composite material, wherein the magnetic nanoparticles have characteristics of uniform size and uniform distribution; with a surface silanization reaction, vinyl is grafted on the surface of magnetic halloysite, and with reverse atom transfer radical precipitation polymerization, the molecular imprinting polymerization layer covered on the magnetic attapulgite surface can be well controlled to tens of nanometers; and due to the presence of the ATRP active group on the outer surface, the hydrophilic polymer brush is successfully grafted, and is successfully applied for selective removal and rapid magnetic separation of sulfamethazine in the water environment, and an excellent reproduction performance is provided.

Description

technical field [0001] The invention relates to a preparation method and application of a hydrophilic nanocomposite material imprinted on the surface of magnetic attapulgite, and belongs to the technical field of preparation of environmental functional materials. Background technique [0002] Molecularly imprinted polymers are polymers synthesized by molecular imprinting technology that have specific recognition and selective adsorption of specific target molecules (template molecules) and their structural analogs, and have structure-effect predetermined, specific recognition and wide practicability. , and has good stability. However, the traditional molecular imprinting preparation method obtains a block-like highly cross-linked rigid polymer, which causes the active recognition site to be embedded in the body of the imprinted polymer, so there are some defects, such as: the active site is embedded too deeply, and the transmission The kinetic rate of mass and charge transf...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/32C02F1/28C02F1/48C02F1/58
Inventor 戴江栋邹永立孟敏佳周志平邹天边闫永胜
Owner JIANGSU UNIV
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