A kind of magnetic composite nanomaterial and its preparation method and application

A magnetic composite nano and magnetic nano technology, applied in the field of nano materials, can solve problems such as very different requirements, and achieve the effects of large surface area, increased adsorption capacity, and multiple adsorption sites

Active Publication Date: 2021-06-04
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these preparation methods have very different requirements on their equipment and operating procedures, and the morphology and properties of the obtained products are also very different.

Method used

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  • A kind of magnetic composite nanomaterial and its preparation method and application
  • A kind of magnetic composite nanomaterial and its preparation method and application
  • A kind of magnetic composite nanomaterial and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (mass ratio: 3-aminopropyltriethoxysilane: Fe 3 o 4 =14.19:1; Fe 3 o 4 : cellulose acetate = 20: 1; cellulose acetate: triolein = 6.67: 1)

[0045] (1) Fe 3 o 4 Ferromagnetic nanoparticles were uniformly dispersed in absolute ethanol solution, and the volume was adjusted to 55mL to obtain 40mg / mL Fe 3 o 4 Ethanol dispersion of ferromagnetic nanoparticles.

[0046] (2) 3 mL of 3-aminopropyltriethoxysilane (KH550) was dissolved in 40 mL of toluene organic solvent, and transferred to a three-neck round bottom flask. 5mLFe 3 o 4 Add the ethanol dispersion of ferromagnetic nanoparticles into the above-mentioned round bottom flask. Ultrasonic 5min, increase Fe 3 o 4 Dispersion of ferromagnetic nanoparticles and promote their uniform mixing with KH550. Under the condition of mechanical stirring at 350r / min and heating at 90°C, let KH550 and Fe 3 o 4 The ferromagnetic nanoparticles were reacted for 3 hours. Use the condensing reflux device to prevent toluene fro...

Embodiment 2

[0050] (mass ratio: 3-aminopropyltriethoxysilane: Fe 3 o 4 =15:1; Fe 3 o 4 : cellulose acetate = 16: 1; cellulose acetate: triolein = 6: 1)

[0051] (1) Fe 3 o 4 The ferromagnetic nanoparticles were evenly dispersed in absolute ethanol solution, and the volume was adjusted to 55mL to obtain a 40mg / mL MNPs ethanol dispersion.

[0052] (2) 2.28 mL of 3-aminopropyltriethoxysilane was dissolved in 40 mL of toluene organic solvent, and transferred to a three-neck round bottom flask. 3.6mLFe 3 o 4 Add the ethanol dispersion of ferromagnetic nanoparticles into the above-mentioned round bottom flask. Ultrasonic 2min, increase Fe 3 o 4 Dispersion of ferromagnetic nanoparticles and promote their uniform mixing with KH550. Under the conditions of mechanical stirring at 350r / min and heating at 50°C, let KH550 and Fe 3 o 4 The ferromagnetic nanoparticles were reacted for 3 hours. Use the condensing reflux device to prevent toluene from escaping from the bottle due to heating....

Embodiment 3

[0056] (mass ratio: 3-aminopropyltriethoxysilane: Fe 3 o 4 =15:1; Fe 3 o 4 : cellulose acetate = 23:1; cellulose acetate: triolein = 6:1)

[0057] (1) Fe 3 o 4 Ferromagnetic nanoparticles were uniformly dispersed in methanol solution, and the volume was adjusted to 40mL to obtain 50mg / mL Fe 3 o 4 Methanol dispersion of ferromagnetic nanoparticles.

[0058] (2) 3.28ml of 3-aminopropyltriethoxysilane was dissolved in 30ml of toluene organic solvent, and transferred to a three-neck round bottom flask. 4.14mLFe 3 o 4 The methanol dispersion of ferromagnetic nanoparticles was added to the above-mentioned round bottom flask. Ultrasonic 10min, increase Fe 3 o 4 Dispersion of ferromagnetic nanoparticles and promote their uniform mixing with KH550. Under the condition of mechanical stirring at 200r / min and heating at 45°C, let KH550 and Fe 3 o 4 The ferromagnetic nanoparticles were reacted for 2 hours. Use the condensing reflux device to prevent toluene from escaping fr...

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Abstract

The invention belongs to the field of nanometer materials, and specifically discloses a magnetic composite nanometer material, a preparation method and an application thereof. The raw materials for the preparation of the magnetic composite nanomaterial include Fe 3 o 4 Ferromagnetic nanoparticles, cellulose acetate and glyceryl trioleate, by modifying the surface of magnetic nanoparticles of cellulose acetate, and fixing glyceryl trioleate in the microporous structure of cellulose acetate; by controlling the ratio of solvent addition and temperature and other conditions, magnetic composite nanoparticles can be prepared. The preparation method of the magnetic composite nanomaterial is a chemical co-precipitation synthesis technology, which has the advantages of simple preparation process and equipment requirements, high stability of the produced material, and the obtained magnetic composite nanoparticle not only has a large specific surface area, but also has the advantages of being resistant to pollutants. The adsorption efficiency is fast, and it can be used for the adsorption of organic matter in sewage treatment; and there is less superparamagnetic interference to the material itself, and it can be quickly recovered under an external magnetic field, avoiding environmental pollution.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and in particular relates to a magnetic composite nanometer material and its preparation method and application. Background technique [0002] Industrial development has led to an increasing number and types of organic pollutants in environmental water bodies. After these organic compounds are ingested by aquatic organisms, they will destroy the cell structure, cause biological diseases and even death, and finally lead to the deterioration of water environment quality. After being ingested by organisms, most persistent organic substances enter and accumulate in cells through passive diffusion. When the concentration of a pollutant that is enriched by the organism exceeds a certain threshold, the pollutant has a toxic effect on the organism. Therefore, effective assessment of the toxic effects of pollutants in environmental water bodies on aquatic organisms is an important prerequisite for eva...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30
CPCB01J20/06B01J20/22B01J20/28009C02F1/288C02F2101/20C02F2101/30
Inventor 汪浩虢清伟龚天尧卓琼芳赵晓丽韩雪娇
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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