Preparation method of hydrophobic magnetic composite material

A magnetic composite material and hydrophobicity technology, applied in the direction of the magnetism of inorganic materials, can solve the problems of dispersion, production intermediate reaction conditions, poor product stability and uniformity, difficult to control the synthesis process, etc. uniform size, strong magnetism, and low production cost

Active Publication Date: 2017-08-18
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this method uses one-step synthesis, it is relatively simple, but it is difficult to control the intermediate process of synthesis. Factors such as its dispersibility and yield are greatly affected by the intermediate reaction conditions, and the stability and uniformity of the product of the one-step synthesis method are not as good as those of the multi-step synthesis method.
[0005] In addition, most of the preparation methods of magnetic composite nanoparticles similar to the traditional ones are limited to the research of hydrophilic magnetic nanocomposites, and there is no research on hydrophobic Fe 3 o 4 -Research on Au materials

Method used

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  • Preparation method of hydrophobic magnetic composite material
  • Preparation method of hydrophobic magnetic composite material
  • Preparation method of hydrophobic magnetic composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Dissolve anhydrous ferric chloride (0.811g, 5mM) in ethylene glycol, stir for 30min, add anhydrous sodium acetate (3.6g) and polyethylene glycol (1g), stir for 5h, transfer the mixture to 50mL In a polytetrafluoroethylene autoclave, react at 200°C for 8h to obtain a precipitate, wash with ethanol and pure water in sequence, and dry at 60°C for 6h to obtain Fe 3 o 4 powder;

[0036]2) get the Fe obtained in step 1) 3 o 4 Disperse the powder (0.3g) into 30mL of pure water, add 0.5g of glucose, sonicate for 30min, transfer to a 50mL polytetrafluoroethylene autoclave, react at 200°C for 12h, obtain a precipitate, wash with pure water, and dry at 60°C for 6h , get Fe 3 o 4 / C powder;

[0037] 3) get the 0.3g Fe obtained in step 2) 3 o 4 / C powder is dispersed in isopropanol, add 200μL 3-aminopropyltriethoxysilane (APTES), react at 80°C for 2h, wash with ethanol and pure water in sequence, and dry at 60°C for 6-8h to obtain a black product ;

[0038] 4) Dissolve ...

Embodiment 2

[0044] 1) Dissolve anhydrous ferric chloride (0.811g, 5mM) in ethylene glycol, stir for 30min, add anhydrous sodium acetate (3.6g) and polyethylene glycol (1g), stir for 5h, transfer the mixture to 50mL In a polytetrafluoroethylene autoclave, react at 180°C for 8h to obtain a precipitate, wash with ethanol and pure water in sequence, and dry at 60°C for 6h to obtain Fe 3 o 4 powder;

[0045] 2) get the Fe obtained in step 1) 3 o 4 The powder (0.3g) was dispersed in 30mL of pure water, 1.0g of glucose was added, ultrasonicated for 30min, transferred to a 50mL polytetrafluoroethylene autoclave, and reacted at 200°C for 10h to obtain a precipitate, which was washed with pure water and dried at 60°C for 6 ~8h, get Fe 3 o 4 / C powder;

[0046] 3) get the 0.3g Fe obtained in step 2) 3 o 4 / C powder is dispersed in isopropanol, add 100 μL 3-aminopropyltriethoxysilane (APTES), react at 80°C for 4 hours, wash with ethanol and pure water in sequence, and dry at 60°C for 6-8 hour...

Embodiment 3

[0050] 1) Dissolve anhydrous ferric chloride (0.811g, 5mM) in ethylene glycol, stir for 30min, add anhydrous sodium acetate (3.6g) and polyethylene glycol (1g), stir for 5h, transfer the mixture to 50mL In a polytetrafluoroethylene autoclave, react at 200°C for 8h to obtain a precipitate, wash with ethanol and pure water in sequence, and dry at 60°C for 6h to obtain Fe 3 o 4 powder;

[0051] 2) get the Fe obtained in step 1) 3 o 4 The powder (0.3g) was dispersed in 30mL of pure water, 2.0g of glucose was added, ultrasonicated for 30min, transferred to a 50mL polytetrafluoroethylene autoclave, and reacted at 200°C for 10h to obtain a precipitate, which was washed with pure water and dried at 60°C for 6 ~8h, get Fe 3 o 4 / C powder;

[0052] 3) get the 0.3g Fe obtained in step 2) 3 o 4 Disperse the / C powder in isopropanol, add 150 μL 3-aminopropyltriethoxysilane (APTES), react at a constant temperature of 90°C for 2 hours, wash with ethanol and pure water in sequence, an...

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Abstract

The invention relates to a preparation method of a hydrophobic magnetic composite material. The preparation method comprises the following steps of 1) preparing Fe3O4 nanoparticles; 2) dispersing the Fe3O4 nanoparticles in the step 1) in water for hydrothermal reaction with glucose to obtain Fe3O4 / C powder; 3) dispersing the Fe3O4 / C powder in the step 2) in isopropyl alcohol, and adding 3-aminopropyltriethoxysilane for surface modification to obtain an intermediate product; 4) preparing nanoparticle colloid by a sodium citrate method; and 5) dispersing the intermediate product in the step 3) in the water, adding gold nanoparticle colloid for continuous ultrasound under an ultrasound state, performing cleaning, dispersing the gold nanoparticle colloid in n-hexane, adding 1H, 1H, 2H, 2H-perfluorooctyl trichlorosilane for hydrophobic processing, and performing separation and drying to obtain the hydrophobic Fe3O4 / C / Au magnetic composite material. The Fe3O4 / C / Au magnetic composite material prepared by the method is stable in structure and has hydrophobicity.

Description

technical field [0001] The invention relates to a preparation method of a magnetic composite material, in particular to a preparation method of a hydrophobic magnetic composite material. Background technique [0002] In recent years, due to their unique physical and chemical properties, magnetic nanomaterials have broad application prospects in medical, biological, chemical, optical and other fields, and have attracted widespread attention. where Fe 3 o 4 Magnetic nanoparticles have the advantages of strong magnetic sensitivity and easy control of particle size, and their preparation and performance control have become a research hotspot. As the most stable metal nanomaterial, gold nanoparticles have excellent properties such as chemical catalysis and biosensing, and have become a hot material for scientific research and engineering applications. Therefore Fe 3 o 4 Combined with the function of Au nanoparticles to form magnetic composite nanoparticles, the function is f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/09
CPCH01F1/09
Inventor 叶苗苗陈蓉张土乔刘小为朱科杭
Owner ZHEJIANG UNIV
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