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

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 ...

AI Technical Summary

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.

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