Graphene oxide-ferroferric oxide magnetic liquid-cement based composite material and preparation method thereof

Abstract

The invention discloses a graphene oxide-ferroferric oxide magnetic liquid-cement based composite material and a preparation method thereof. The graphene oxide is doped into the graphene oxide-Fe3O4 magnetic liquid-cement based composite material, so holes in a cement stone are reduced, the hole structure of the cement stone is improved and gel in the cement is more uniform and compact. Meanwhile,due to doping of the graphene oxide, the generation of needle-shaped ettringite can be reduced and the structure of the cement stone is more compact. In addition, the magnetic material, namely the Fe3O4 magnetic liquid, is added, and the magnetic conductance of the composite material is increased, so that the electromagnetic shielding performance of the cement based composite material is improved. Meanwhile, the invention innovatively provides a ball-milling mode to replace stirring, so that the difficulty that the ferroferric oxide magnetic liquid is difficult to distribute on the cement based material uniformly is overcome. Therefore, the composite material provided by the invention has wide application prospect.

Description

technical field [0001] The invention relates to an electromagnetic shielding composite material, in particular to a graphene oxide-ferric oxide (Fe 3 o 4 ) Ferrofluid-cement based composite material and preparation method thereof. Background technique [0002] The existing cement-based electromagnetic shielding composite materials usually use metal materials or carbon materials, but due to the characteristics of the added materials, electromagnetic shielding can generally only be performed through the reflective properties of metal materials or the wave-absorbing properties of carbon materials, and the cost is high. It is difficult to stir evenly, and it is easy to have leakage points. However, according to the characteristics that the electromagnetic field is composed of electric field and magnetic field, if materials with high conductivity and high magnetism can be added to the cement base, the dielectric constant and magnetic permeability of the cement base material can...

AI Technical Summary

Problems solved by technology

If the magnetic fluid is directly added to the same relatively viscous cement-based material, it will not be able to use conventional methods to stir evenly

In addition, the commonly used cement-based stirring devices usually contain iron elements, so during the stirring process, it is easy to make the ferroferric oxide magnetic fluid adsorb on the stirring device, resulting in separation from the cement-based material

[0004] In addition, at present, graphene and cement dry powder are usually mixed together by dry mixing, and then mixed with water. In fact, it is difficult to achieve a uniform distribution of graphene in cement-based materials.

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