A kind of single-layer cement-based wave-absorbing body mixed with nano wave-absorbing agent and preparation method thereof

Abstract

The invention discloses a single-layer cement-based wave-absorbing body compounded with a nano-wave absorbing agent and a preparation method thereof. The wave-absorbing body includes cement, silica fume, water, reduced graphene oxide, nano-ferric oxide, and nickel Multi-walled carbon nanotubes and water reducer, other components account for 5-20%, 30-40%, 0.01-0.1%, 1-3%, 0.2-1.5% and 0.1-0.5% of the cement mass respectively; preparation method The method includes the following steps: weighing required materials; pouring cement and silica fume into a stirring pot and stirring evenly; after stirring evenly, pouring nano ferric oxide and nickel-plated multi-walled carbon nanotubes into the stirring pot; stirring at a low speed for 2 to 5 minutes; Then add the dispersion of reduced graphene oxide and mix evenly; then add water and water reducing agent, stir the mixer at low speed for 2-5 minutes, stop for 10-30 seconds, stir at high speed for 2-5 minutes, inject the mixed slurry into the mold for vibration molding, And put it in a constant temperature and humidity box for curing, demould after 24 hours, continue curing under this condition, and you will get it. The invention is green, environment-friendly, non-radioactive, has a simple preparation process, is convenient to form, can be produced in a standardized manner, and is well integrated with buildings.

Description

technical field [0001] The invention belongs to a novel modified cement-based composite material, and in particular relates to a single-layer cement-based wave-absorbing body compounded with nano wave-absorbing agents and a preparation method thereof. Background technique [0002] With the rapid development of the electronic information industry, electromagnetic waves, as an important carrier of information dissemination, have penetrated into all aspects of people's lives. Electromagnetic radiation is generated when electrical equipment is working, and it propagates to the surrounding environment in the form of conduction coupling and radiation coupling. At present, electromagnetic radiation has been listed as the fourth largest pollution source after water, air and noise by relevant organizations. Electromagnetic radiation not only reduces the use efficiency, performance and reliability of electronic equipment, but also reduces the service life and safety of electronic equ...

AI Technical Summary

Problems solved by technology

Traditional carbon-based materials such as graphite, modified graphite, and carbon black have good electrical conductivity and microwave absorption properties, but when they are mixed into cement-based materials, a "ball effect" will appear, which will significantly reduce the mechanical properties of the composite material.

[0010] At the same time, because it is difficult to achieve the goal of broadband absorption for single-component absorbers, the absorbing performance is often poor, which can no longer meet the requirements of high efficiency and light absorbing materials. Therefore, the preparation of nano-absorbers with both dielectric loss and magnetic loss Wave agent has become a hot spot in the field of wave-absorbing materials research

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