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

A composite material and graphene technology, which is applied in the field of graphene oxide-ferric oxide ferrofluid-cement-based composite materials and its preparation, can solve the problems that it is difficult to achieve uniform distribution of graphene and cannot be used to stir evenly. Achieve the effect of compact structure, good electromagnetic shielding performance and wide application prospects

Active Publication Date: 2018-07-24
GUANGZHOU UNIVERSITY
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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 magn

Method used

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

Examples

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[0034] Example 1

[0035] Step A: Preparation of ordinary cement-based composite material, number C0. Use ordinary 325 Portland cement with a water-cement ratio of 0.5, weigh 500g cement, 250g water, pour the cement powder into the pure slurry mixer, stir for 10 seconds, pour in water, and continue stirring for 2 minutes. Pour the mixed cement slurry into the mold, smooth the surface, leave it for 24 hours, remove the mold, put it in a standard curing box (20°C, 98% humidity) for 28 days, and take it out for use.

[0036] Step B: Preparation of graphene oxide-cement-based composite material, numbered C1. Using ordinary 325 Portland cement with a water-cement ratio of 0.4, weigh 500g cement, 200g water, and 50g graphene oxide suspension. Pour the cement powder into the pure slurry mixer. After stirring for 10 seconds, pour in water, continue stirring for 2 minutes, pour into the graphene oxide suspension, and stir for 1 minute. Pour the mixed cement slurry into the mold, smooth t...

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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...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B40/00
CPCC04B28/04C04B40/0028C04B2111/00258C04B14/024C04B14/308
Inventor 赵若红袁迪徐安傅继阳刘爱荣吴玖荣
Owner GUANGZHOU UNIVERSITY
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