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Ethylene glycol-based magnetic fluid composite film and preparation method thereof

A ethylene glycol, magnetic fluid technology, applied in the direction of magnetic objects, magnetic films, magnetic liquids, etc., can solve the problem that the dispersion degree of magnetic nanoparticles is not significantly improved, and achieve excellent superparamagnetic performance, good elasticity, and avoid agglomeration. Effect

Inactive Publication Date: 2017-11-14
XINJIANG UNIVERSITY
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] Magnetic fluid composite membranes are generally prepared from polymers and water-based magnetic fluids or oil-based magnetic fluids, and the degree of dispersion of magnetic nanoparticles in the magnetic fluid determines the paramagnetic properties of magnetic fluid composite membranes. The ferrofluid-carrier liquid matrix is ​​generally water-based and oil-based, and the direction of improving the dispersion of magnetic nanoparticles is concentrated on the selection of dispersants, resulting in no significant improvement in the degree of dispersion of magnetic nanoparticles in ferrofluid.

Method used

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  • Ethylene glycol-based magnetic fluid composite film and preparation method thereof
  • Ethylene glycol-based magnetic fluid composite film and preparation method thereof
  • Ethylene glycol-based magnetic fluid composite film and preparation method thereof

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[0042] 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 composite membrane, comprising the following steps:

[0043] (a) mixing ethylene glycol, a dispersion stabilizer and nano ferric oxide, and dispersing evenly to obtain an ethylene glycol-based magnetic fluid;

[0044] (b) dissolving polyvinyl alcohol in deionized water, then adding ethylene glycol-based magnetic fluid, uniformly dispersed, and then coating a film to obtain an ethylene glycol-based magnetic fluid composite film.

[0045] The preparation method of the ethylene glycol-based magnetic fluid composite membrane provided by the invention has the advantages of safe and convenient operation, mild reaction conditions, and does not require harsh equipment conditions, so that it can be used in industrialized production.

[0046] In a preferred embodiment of the present invention, in step (a), disper...

Embodiment 1

[0064] This embodiment provides an ethylene glycol-based magnetic fluid composite film, which is prepared from the following components in parts by mass: 90 parts of ethylene glycol-based magnetic fluid, 25 parts of polyvinyl alcohol, and 85 parts of deionized water , wherein the ethylene glycol-based magnetic fluid is prepared from the following components in parts by mass: 25 parts of nano-ferric oxide, 40 parts of ethylene glycol, 35 parts of a dispersion stabilizer, and the dispersion stabilizer is citric acid.

Embodiment 2

[0066] This embodiment provides an ethylene glycol-based magnetic fluid composite film, which is prepared from the following components in parts by mass: 110 parts of ethylene glycol-based magnetic fluid, 20 parts of polyvinyl alcohol, and 70 parts of deionized water , wherein the ethylene glycol-based magnetic fluid is prepared from the following components in parts by mass: 35 parts of nanometer ferric oxide, 30 parts of ethylene glycol, 35 parts of a dispersion stabilizer, and the dispersion stabilizer is sodium citrate.

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Abstract

The invention provides an ethylene glycol-based magnetic fluid composite film and a preparation method thereof, which relate to the technical field of magnetic composite materials and are mainly prepared from the following components in parts by mass: ethylene glycol-based magnetic fluid 90-110 15-25 parts of polyvinyl alcohol, 70-90 parts of deionized water, among which, the ethylene glycol-based magnetic fluid is mainly prepared from nano ferric oxide, ethylene glycol and a dispersion stabilizer, which relieves the existing magnetic fluid Among them, the carrier liquid matrix is ​​water-based or oil-based, so that the degree of dispersion of magnetic nanoparticles has not been significantly improved, resulting in the technical problem that the performance of the magnetic fluid composite film is limited. The ionic water cooperates with each other to make the magnetic particles evenly distributed in the composite film, so that the composite film can maintain good paramagnetic properties, the saturation magnetization is larger, the magnetic susceptibility per unit mass is higher, and the strain capacity is better. The technical effect of better magnetic properties.

Description

technical field [0001] The invention relates to the technical field of magnetic composite materials, in particular to an ethylene glycol-based magnetic fluid composite film 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, the research work has carried out extensive exploration and research on ferrofluid, and prepared it with polymers to form a ferrofluid composite film, which is used in medical equipment, aerospace, magnetic sealing, chemical industry, fast magnetic printing and other ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F10/00H01F1/44H01F10/18H01F41/22
CPCH01F10/005H01F1/445H01F10/18H01F41/22
Inventor 郑国华张殿君陈洁
Owner XINJIANG UNIVERSITY
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