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Magnetic polymer particle, its preparation method and its application

A technology of polymer particles and polymers, applied in chemical instruments and methods, the magnetism of organic materials/organic magnetic materials, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem that the magnetic retention rate needs to be further improved and other problems, to achieve the effect of high magnetic retention rate, good compatibility and strong interaction force

Active Publication Date: 2012-11-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Yet, the magnetic retention rate after the regeneration of described composite magnetic cation exchange resin disclosed by CN101440166A still needs to be further improved

Method used

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  • Magnetic polymer particle, its preparation method and its application
  • Magnetic polymer particle, its preparation method and its application
  • Magnetic polymer particle, its preparation method and its application

Examples

Experimental program
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preparation example Construction

[0030] The present invention also provides a method for preparing magnetic polymer particles, the method comprising: forming a silicon dioxide coating layer on the surface of the magnetic particles to obtain a magnetic core; and embedding the magnetic core in a polymer to obtain Magnetic polymer particles are formed.

[0031] According to the method of the invention, the ratio between the magnetic particles and the silica coating can be varied within a wide range. Preferably, the amount of the magnetic particles and the amount of the silica coating layer are such that the ratio between the average particle diameter of the magnetic particles and the average particle diameter of the obtained magnetic core is preferably 1:1.1-3.5, More preferably 1:1.2-2.5.

[0032] According to the method of the invention, the ratio between the amount of the magnetic core and the amount of the polymer can be varied within wide ranges. Generally, the ratio between the amount of the magnetic cor...

Embodiment 1

[0078] This example is used to illustrate the magnetic polymer particle and its preparation method according to the present invention.

[0079] (1) Add 5g of iron powder with an average particle diameter of 50nm (the specific saturation magnetization is 121emu / g) into the three-necked flask, and then add 200mL of deionized water to the above-mentioned three-necked flask with stirring, followed by adding 20mL of 0.01mol / L of 3-aminopropyltriethoxysilane in water. After stirring for 30 minutes, 55 mL of an aqueous sodium silicate solution with a pH value of 8 and a concentration of 0.2 mol / L was added. After stirring at 75° C. for 24 hours, the resulting solution was centrifuged to obtain a solid component. Then, the obtained solid component was dispersed in a mixed solution of 150 mL of water and ethanol (the volume ratio of water and ethanol was 1:9), and then with stirring, 87 mL of a concentration of 0.2 mol / L was added dropwise to the above solution. An ethanol solution ...

Embodiment 2

[0087] This example is used to illustrate the magnetic polymer particle and its preparation method according to the present invention.

[0088] (1) Add 5g of Fe with an average particle diameter of 20nm in a three-necked flask 3 o 4 powder (the specific saturation magnetization is 78.7emu / g), and then with stirring, add 150mL of a mixture of water and ethanol (the volume ratio of water to ethanol is 1:9) into the above-mentioned three-necked flask, and then add 145mL of 0.2mol The ethanol solution of tetraethyl orthosilicate in / L, the above-mentioned three-neck flask is placed in the ultrasonic disperser and carries out ultrasonic treatment for 10 minutes, and in the solution after ultrasonic treatment along with stirring, drip the ammoniacal liquor that concentration is 25% by weight, make reaction The pH value of the solution was 10±0.2, and the stirring was continued at 35°C for 6h. Finally, solid-liquid separation was carried out, and the obtained solid was washed twice w...

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Abstract

The invention provides a magnetic polymer particle. The magnetic polymer particle contains a polymer and one or more magnetic nuclei embedded in the polymer, wherein the magnetic nucleus is a magnetic particle with the surface having a silica coating. The invention also provides a preparation method of the magnetic polymer particle. The method comprises the following steps: forming the silica coating on the surface of the magnetic particle to obtain the magnetic nucleus; and embedding the magnetic nucleus in the polymer to form the magnetic polymer particle. The invention also provides an application of the magnetic polymer particle as a solid acid catalyst when the polymer in the magnetic polymer particle is a sulfonic acid cation exchange resin. The magnetic polymer particle prepared through the preparation method has a good structure stability, and still has a high magnetic retention rate even after multi-time physical or chemical treatment.

Description

technical field [0001] The invention relates to a magnetic polymer particle and its preparation method and application. Background technique [0002] Since the advent of phenolic ion exchange resins in the 1930s, after more than 70 years of development, the types of ion exchange resins have continued to increase, their performance has continued to improve, and their application fields have also been greatly expanded. In order to solve the problems of slow self-sedimentation rate of small particle powder resin in adsorption and ion exchange, difficult filter regeneration operation, easy agglomeration during operation, and large bed pressure drop during operation, Weiss and his collaborators worked in the 20th century. In the 1970s, the concept of magnetic resin was proposed. Since then, domestic and foreign scientific and technical personnel have carried out a lot of research work on magnetic polymer materials, and the research scope involves various magnetic polymer materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L101/00C08K9/10C08K3/08C08K3/22H01F1/42C08L101/02B01J31/28
Inventor 胡见波宗保宁
Owner CHINA PETROLEUM & CHEM CORP
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