Cement-based wave-absorbing material doped by graphene oxide and preparation method thereof

A technology of wave absorbing material and graphene, applied in the field of cement-based wave absorbing material doped with graphene oxide and its preparation, can solve the problems of narrow frequency band, undiscovered, unable to reach broadband, etc. The effect of remarkable electromagnetic wave shielding performance and convenient forming

Inactive Publication Date: 2017-11-03
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The cement-based material mixed with a single conductive wave-absorbing filler only has good absorption and shielding performance for electromagnetic waves in a certain frequency range, but the frequency band is narrow and cannot achieve the purpose of broadband. The double-

Method used

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  • Cement-based wave-absorbing material doped by graphene oxide and preparation method thereof
  • Cement-based wave-absorbing material doped by graphene oxide and preparation method thereof
  • Cement-based wave-absorbing material doped by graphene oxide and preparation method thereof

Examples

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Example Embodiment

[0032] Example 1:

[0033] A preparation method of cement-based wave absorbing material mixed with graphene oxide includes the following steps: weighing cement for use, taking the cement mass as 1, weighing 10% silica fume according to the mass ratio, and pour the two into a mixing pot and stir Evenly, after stirring evenly, weigh 2% nano ferroferric oxide and 0.7% nano nickel, stir at low speed for 2.5 min; then add graphene oxide (0.05%) dispersion to the stirred mixture, and vibrate ultrasonically; finally Weigh 42% water and 0.5% water reducing agent, add them to the mixture, stir at low speed for 2.5 min with a mixer, stop for 20 seconds, stir at high speed for 2.5 min, and pour the mixed slurry into 300×300×30mm 3 The mold is formed by vibration and placed in a constant temperature and humidity box, keeping the temperature at 18-22°C and relative humidity> 90%. After 24h, the mold will be demolded and continue to be maintained under this condition for 7d, 28d and 28d and the...

Example Embodiment

[0035] Example 2:

[0036] A preparation method of cement-based wave absorbing material mixed with graphene oxide includes the following steps: weighing cement for use, taking the cement mass as 1, weighing 10% silica fume according to the mass ratio, and pour the two into a mixing pot and stir Evenly, after stirring evenly, weigh 2% nano ferroferric oxide and 2.1% nano nickel, stir at low speed for 3 min; then add graphene oxide (0.03%) dispersion to the stirred mixture, and vibrate ultrasonically; finally weigh Take 40% water and 0.4% water reducing agent, add to the mixture, stir at low speed for 2.5min with agitator, stop for 15s, stir at high speed for 2min, pour the mixed slurry into 300×300×30mm 3 The mold is formed by vibration and placed in a constant temperature and humidity box, keeping the temperature at 18-22°C and relative humidity> 90%. After 24h, the mold will be demolded and continue to be maintained under this condition for 7d, 28d and 28d and then maintained in ...

Example Embodiment

[0038] Example 3:

[0039] A preparation method of cement-based wave absorbing material mixed with graphene oxide includes the following steps: weighing cement for use, taking the cement mass as 1, weighing 10% silica fume according to the mass ratio, and pour the two into a mixing pot and stir Evenly, after stirring evenly, weigh 2% nano ferroferric oxide and 0.7% nano nickel, stir at low speed for 2 min; then add graphene oxide (0.01%) dispersion to the stirred mixture, and vibrate ultrasonically; finally weigh Take 42% water and 0.5% water reducing agent, add to the mixture, stir with the mixer at low speed for 2 minutes, stop for 10 seconds, stir at high speed for 2 minutes, and pour the mixed slurry into 300×300×30mm 3 The mold is formed by vibration and placed in a constant temperature and humidity box, keeping the temperature at 18-22°C and relative humidity> 90%. After 24h, the mold will be demolded and continue to be maintained under this condition for 7d, 28d and 28d and...

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Abstract

The invention discloses a cement-based wave-absorbing material doped by graphene oxide and a preparation method thereof. The preparation method comprises the following steps: weighing cement for subsequent usage; weighing silica fume according to a certain mass ratio, pouring the cement and silica fume into a stirring pot, carrying out uniform mixing under stirring, then weighing nanometer ferriferrous oxide and nanometer nickel according to a certain mass ratio, pouring the weighed nanometer ferriferrous oxide and nanometer nickel into the stirring pot and carrying out low-speed stirring for 2 to 5 min; adding dispersion liquid of graphene oxide into a mixture obtained in the previous step and carrying out ultrasonic vibration; and finally, weighing water and a water reducer according to a mass ratio, adding the weighed water and water reducer into the mixture, carrying out low-speed stirring with an agitator for 2 to 5 min, stopping stirring for 10 to 30 s, then carrying out high-speed stirring for 2 to 5 min, injecting obtained slurry into a mold, carrying out vibration molding, then carrying out maintenance in a constant-temperature constant-humidity case, carrying out demolding in 24 h and then continuing maintenance under same conditions so as to obtain the cement-based wave-absorbing material. The cement-based wave-absorbing material doped by graphene oxide has the advantages of good wave absorption performance, wide frequency range, environment friendliness and no radioactivity; the preparation method is simple in process, easy in shaping and suitable for standard production; and the prepared material can be well bonded with buildings.

Description

technical field [0001] The invention belongs to a novel modified cement-based composite material, in particular to a cement-based wave-absorbing material mixed with graphene oxide and a preparation method thereof. Background technique [0002] At present, electromagnetic wave radiation has been listed as the fourth largest pollution source after water pollution, air pollution and noise pollution by relevant organizations. Cement-based materials have abundant resources and good environmental adaptability, and are the main source of building materials, but they have weak electromagnetic wave absorption and shielding properties, and are almost transparent to electromagnetic waves. Add wave-absorbing fillers to cement-based materials, use its high conductivity to form a closed conductive path to prevent electromagnetic waves from penetrating, and convert electromagnetic waves transmitted to cement-based materials into heat or other forms of energy consumption. This technical pa...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B14/02C04B14/30C04B14/34C04B20/00
CPCC04B28/04C04B14/024C04B14/308C04B14/34C04B20/008C04B2111/00258C04B2201/50C04B18/146C04B22/002C04B24/24
Inventor 孙亚飞高培伟刘宏伟周天舒李隽陈敏
Owner YANCHENG INST OF TECH
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