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A high-performance γ‑fe 2 o 3 Magnetic fluid and its preparation method

A high-performance, magnetic fluid technology, applied in the field of nanotechnology and material preparation, can solve the problems of complex process and high cost, and achieve the effect of simple production process, low product cost and low production investment

Inactive Publication Date: 2017-02-15
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of these preparation methods are complex and expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Magnetic Fe 3 o 4 Preparation and Surface Modification of Nanoparticles

[0020] Prepare magnetic nanoparticles by chemical co-precipitation method, weigh 29g of FeCl 3 ·6H 2 O solid and 16 g of FeSO 4 ·7H 2 O powder, mix and dissolve it in 270ml of deionized water, then put it in a constant temperature water bath, keep the temperature at 70°C; after keeping it warm for 10 minutes, measure 63ml of 25-28% NH 3 ·H 2 O was quickly added to the beaker and kept stirring. After 11 minutes of reaction, 2.7g of sodium oleate powder was added, and the stirring was continued for 40 minutes to obtain black Fe 3 o 4 The turbid solution was left to stand under a magnetic field until it separated, the supernatant was removed, and the lower layer of Fe was washed several times with deionized water and acetone. 3 o 4 colloid; dried to Fe 3 o 4 magnetic nanoparticles;

[0021] (2) Magnetic γ-Fe 2 o 3 Preparation of nanoparticles

[0022] Fe will be produced 3 o 4 Th...

Embodiment 2

[0026] (1) Magnetic Fe 3 o 4 Preparation and surface modification of nanoparticles

[0027] Prepare magnetic nanoparticles by chemical co-precipitation method, weigh 80g of FeCl 3 ·6H 2 O solid and 55 g of FeSO 4 ·7H 2 O powder, mix and dissolve it in 650ml of deionized water, then put it into a constant temperature water bath, keep the temperature at 80°C; after keeping it warm for 8 minutes, measure 180ml of 25-28% NH 3 ·H 2O was quickly added to the beaker and kept stirring. After 10 minutes of reaction, 29g of sodium oleate powder was added, and the stirring was continued for 60 minutes to obtain black Fe 3 o 4 The turbid solution was left to stand under a magnetic field until it separated, the supernatant was removed, and the lower layer of Fe was washed several times with deionized water and acetone. 3 o 4 colloid; dried to Fe 3 o 4 magnetic nanoparticles;

[0028] (2) Magnetic γ-Fe 2 o 3 Preparation of nanoparticles

[0029] Fe will be produced 3 o 4 Th...

Embodiment 3

[0033] (1) Magnetic Fe 3 o 4 Preparation and surface modification of nanoparticles

[0034] Prepare magnetic nanoparticles by chemical co-precipitation method, weigh 55g of FeCl 3 ·6H 2 O solid and 25 g of FeSO 4 ·7H 2 O powder, mix and dissolve it in 470ml of deionized water, then put it into a constant temperature water bath, keep the temperature at 75°C; after 12 minutes of heat preservation, measure 120ml of 25-28% 3 ·H 2 O was quickly added to the beaker and kept stirring. After 8 minutes of reaction, 14g of sodium oleate powder was added, and the stirring was continued for 50 minutes to obtain black Fe 3 o 4 The turbid solution was left to stand under a magnetic field until it separated, the supernatant was removed, and the lower layer of Fe was washed several times with deionized water and acetone. 3 o 4 colloid; dried to Fe 3 o 4 magnetic nanoparticles;

[0035] (2) Magnetic γ-Fe 2 o 3 Preparation of nanoparticles

[0036] Fe will be produced 3 o 4 The...

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Abstract

The invention relates to high-performance gamma-Fe2O3 magnetofluid and a preparation method of the high-performance gamma-Fe2O3 magnetofluid, and belongs to the technical field of nanoscale science and technology and material preparation. The preparation method is characterized in that magnetic nanometer particles are prepared through a chemical coprecipitation method, after ferrous salt solutions and ferric salt solutions are evenly mixed, superfluous alkaline solutions are added till complete reaction is finished, then moderate surfactants are added and surface modification treatment is conducted, and finally the magnetic nanometer particles are obtained after sediment is conducted; after the magnetic Fe3O4 nanometer particles are cleaned and dried, the gamma-Fe2O3 magnetic particles are obtained after the cleaned and dried gamma-Fe2O3 magnetic particles are subjected to oxidation at a certain temperature in a certain time period; quantitative surfactants and carrier liquids are added to a gamma-Fe2O3 magnetic particle solution , dispersion is conducted, and the high-performance gamma-Fe2O3 magnetofluid is obtained. The high-performance gamma-Fe2O3 magnetofluid prepared through the preparation method is simple in process and high in specific magnetization, and industrial batch production can be achieved conveniently.

Description

[0001] field of invention [0002] The invention relates to a high-performance gamma-Fe 2 o 3 The magnetic fluid and its preparation method belong to the field of nano science technology and material preparation technology. [0003] Background of the invention [0004] Magnetic fluid is magnetic liquid (Magnetic Liquid), also known as magnetic fluid (Magnetic Fluid) or magnetic colloid (Magnetic Colloid), referred to as magnetic fluid. Magnetic fluid is a ferromagnetic or superparamagnetic fine particle, which is stably dispersed in a colloidal solution or suspension in a carrier liquid by means of a surfactant. It is a new type of important liquid functional material with very special physical and chemical properties. Since it was discovered in the 1940s, after decades of research and development, it has been widely used, and its application range has been extended to various fields such as aerospace, electronics, chemical industry, machinery, energy, metallurgy, instrumenta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/44C01G49/06
Inventor 邵慧萍郑航刘万斌林涛赵子粉
Owner UNIV OF SCI & TECH BEIJING
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