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Glycol-based magnetic fluid and its preparation method

A ethylene glycol and magnetic fluid technology, applied in the field of magnetic fluid, can solve the problem that the dispersion degree of nano-iron tetroxide is not significantly improved, and achieve the effects of excellent superparamagnetic performance, mild reaction conditions, and improved crystallization performance.

Inactive Publication Date: 2017-09-22
XINJIANG UNIVERSITY
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Problems solved by technology

[0005] One of the purpose of the present invention is to provide a kind of ethylene glycol base ferrofluid, to relieve that the existing ferrofluid carrier liquid matrix is ​​generally water-based and oil-based, the direction of improvement is all focused on the selection of dispersant, resulting in nanometer four The degree of dispersion of ferric oxide has not been significantly improved technically

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  • Glycol-based magnetic fluid and its preparation method
  • Glycol-based magnetic fluid and its preparation method

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preparation example Construction

[0034] According to another aspect of the present invention, the present invention also provides a method for preparing the above-mentioned ethylene glycol-based magnetic fluid, which includes the following steps: mixing ethylene glycol, a dispersion stabilizer and nano ferric oxide, and dispersing them evenly, that is, preparing Ethylene glycol-based magnetic fluid was obtained.

[0035] The preparation method of the ethylene glycol-based magnetic fluid provided by the invention has safe and easy-to-obtain raw materials, safe and convenient operation, mild reaction conditions, and does not require harsh equipment conditions, so that it can be used in industrialized production.

[0036] In a preferred embodiment of the invention, dispersion is carried out by mechanical stirring or ultrasound.

[0037] During the preparation process of the ethylene glycol-based magnetic fluid, the dispersant and nano ferric oxide are added to the ethylene glycol at the same time, mechanically v...

Embodiment 1

[0054] The invention provides an ethylene glycol-based magnetic fluid, which is prepared according to the following method:

[0055] (s1) Mix the ferrous chloride solution with a concentration of 0.05mol / L and the ferric sulfate solution with a concentration of 0.3mol / L to form a mixture of ferrous ions and ferric ions with a mass ratio of 1:1.5 solution;

[0056] (s2) Slowly add the sodium hydroxide solution with a concentration of 0.5mol / L to the mixed solution of the ferrous salt and the ferric salt, and vigorously stir while adding, to obtain a nano ferric oxide solution ; After magnetically separating the nano ferric oxide solution, wash it with deionized water and absolute ethanol several times until the pH value is 7, stop the washing, and perform suction filtration to obtain the ferric ferric oxide nanometer;

[0057] (s3) Add 1.24g of nano ferric oxide and 3.27g of sodium hexametaphosphate into 100ml of ethylene glycol, and vigorously stir for 4 hours to prepare an e...

Embodiment 2

[0059] This embodiment provides an ethylene glycol-based magnetic fluid. The difference between this embodiment and Embodiment 1 is that in (s1), a ferrous chloride solution with a concentration of 0.2mol / L and a concentration of 0.06 The ferric nitrate solution of mol / L prepares ferric salt mixed solution; In step (s2), adopt concentration to be the ammoniacal liquor of 3mol / L as precipitating agent; In step (s3), 1.24g nano ferric oxide and 2.14g Polyethylene glycol with a molecular weight of 400 was added to 300 ml of ethylene glycol, and ultrasonically dispersed for 30 minutes to prepare an ethylene glycol-based magnetic fluid with an iron content of 3 mg / ml.

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Abstract

The invention provides an ethylene glycol-based magnetic fluid and a preparation method thereof, which relate to the technical field of magnetic fluids and are mainly composed of nano ferric oxide, a dispersion stabilizer and ethylene glycol, and the dispersion stabilizer is mercaptosuccinic acid , citric acid, sodium citrate, gluconic acid, sodium gluconate, sodium hexametaphosphate, sodium polyphosphate, sodium pyrophosphate, diethylenetriaminepentaacetic acid, disodium edetate, nitrilotri At least one of acetic acid, low-molecular-weight dextran, low-molecular-weight chitosan and low-molecular-weight polyethylene glycol relieves the existing ferrofluid improvement direction from focusing on the selection of dispersants, resulting in The technical problem that the degree of dispersion has not been significantly improved has achieved the use of ethylene glycol as the carrier liquid matrix to prepare ferrofluid, which not only improves the crystallization performance, makes the superparamagnetic performance more excellent, but also improves the dispersion stability of the ferrofluid, making it It can maintain the technical effect of stable dispersion for more than 90 days.

Description

technical field [0001] The invention relates to the technical field of magnetic fluid, in particular to an ethylene glycol-based magnetic fluid and a preparation method thereof. Background technique [0002] Magnetic fluid refers to a stable colloidal system formed by the highly dispersed nano-magnetic particles adsorbed with stabilizers in the carrier liquid. The magnetic fluid has both the magnetism of the magnet and the fluidity of the liquid. When there is no external magnetic field, it is the same as an ordinary liquid. , has fluidity and a certain viscosity, but when there is an external magnetic field, the magnetic fluid exhibits paramagnetism. Because of this characteristic, scientific research work has carried out extensive exploration and research on magnetic fluid, and successfully applied it to medical equipment, aerospace, magnetic sealing, chemical industry, fast magnetic printing and other fields. [0003] The magnetic fluid is mainly composed of nano-magneti...

Claims

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Application Information

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IPC IPC(8): H01F1/44H01F41/00
CPCH01F1/445H01F41/00
Inventor 郑国华张殿君陈洁
Owner XINJIANG UNIVERSITY
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