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A method for preparing monodisperse magnetic melamine resin microspheres

A melamine resin and monodisperse technology, applied in the field of monodisperse magnetic melamine resin microspheres, can solve the problems of affecting modified grafting, difficulty in later removal, etc., and achieve the effects of uniform particle size and simple processing.

Inactive Publication Date: 2017-10-10
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Aiming at the difficulty of later removal and the defects affecting its further modification and grafting caused by the use of dispersants, emulsifiers, surfactants and other substances, the present invention aims to disclose a single-unit preparation with high purity, uniform size and smooth surface. Method for dispersing magnetic melamine resin microspheres

Method used

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  • A method for preparing monodisperse magnetic melamine resin microspheres

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 120g of water into the four-necked flask, raise the temperature to 60°C, then add 10g of formaldehyde solution, raise the temperature to 70°C again, adjust the pH to 8, add 2g of melamine, react for 2 hours, add 1g of ferric oxide nanoparticles, and stir The reaction was carried out for 2 hours at a speed of 200 rpm. Then transferred to an ice-water bath, repeatedly washed and centrifuged three times, air-dried at room temperature, transferred to a vacuum oven, dried in vacuum at 80°C for 9 hours, and ground with an agate mortar to obtain magnetic melamine resin microspheres. 99% of the size of the prepared magnetic melamine resin microspheres is 500±6nm.

Embodiment 2

[0025] Add 200g of water into the four-necked flask, raise the temperature to 60°C, then add 10g of formaldehyde solution, raise the temperature to 70°C again, adjust the pH to 9, add 2.5g of melamine, react for 1h, add 1g of ferric oxide nanoparticles, The reaction was carried out for 1 h at a stirring speed of 200 rpm. Then transferred to an ice-water bath, repeatedly washed and centrifuged three times, air-dried at room temperature, transferred to a vacuum oven, dried in vacuum at 80°C for 8 hours, and ground with an agate mortar to obtain magnetic melamine resin microspheres. 98% of the size of the prepared magnetic melamine resin microspheres is 600±5nm.

Embodiment 3

[0027] Add 200g of water into the four-neck flask, raise the temperature to 70°C, then add 15g of formaldehyde solution, adjust the pH to 9 after raising the temperature to 80°C, add 3.75g of melamine, react for 1h, add 1g of ferric oxide nanoparticles, and stir The reaction was carried out for 2 hours at a speed of 200 rpm. Then transferred to an ice-water bath, repeatedly washed and centrifuged three times, air-dried at room temperature, transferred to a vacuum oven, dried in vacuum at 80°C for 8 hours, and ground with an agate mortar to obtain magnetic melamine resin microspheres. 97% of the prepared magnetic melamine resin microspheres have a size of 800±5nm.

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Abstract

The invention discloses a method for preparing resin microspheres, in particular to a method for preparing monodisperse magnetic melamine resin microspheres. Use melamine and formaldehyde solution as the base material, control the molar ratio of the base material to water, stir evenly, and react under certain conditions to form a melamine resin prepolymer, then add the prepared magnetic ferric iron tetroxide nanoparticles, and react for a period of time , placed in an ice-water bath to terminate the reaction. Wash and centrifuge repeatedly, air-dry at room temperature, and then transfer to a vacuum oven for drying to obtain monodisperse magnetic melamine resin microspheres. The magnetic melamine resin microspheres prepared by the method have a uniform particle size and a particle size distribution of 500 nm to 5 μm, and the size can be controlled by changing the preparation conditions. The prepared magnetic melamine resin microspheres can be used in fields such as chromatographic fillers, catalyst supports, supercapacitor materials, and heavy metal adsorption materials.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to monodisperse magnetic melamine resin microspheres. Background technique [0002] Magnetic polymer microspheres have both magnetic responsiveness and surface functionality of ordinary polymer microspheres, and have shown broad application prospects in many fields such as medicine, biochemistry, molecular biology, and industrial applications, and have been widely recognized by scholars at home and abroad. focus on. [0003] The magnetic microspheres of polymer matrix, especially the polymer magnetic microspheres with monodisperse particle size are the most important ones. This kind of monodisperse magnetic microspheres can be used as carriers to combine with various drugs, and can be used as chromatographic fillers, Catalyst carrier, supercapacitor material and heavy metal adsorption material and other fields. [0004] In recent years, there have been many m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/14C08G12/32
Inventor 孟霞段洪东
Owner QILU UNIV OF TECH