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A kind of electromagnetic wave transmission composite material and its preparation method and application

A composite material, electromagnetic wave technology, applied in the field of composite materials, can solve problems such as low compressive strength, inability to guarantee internal porosity, and mechanical properties that cannot meet engineering requirements

Active Publication Date: 2020-11-10
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the concrete electromagnetic wave transmission layer made by this method cannot meet the needs of the project in terms of related mechanical properties, such as low compressive strength, easy to collapse in the early stage, and cannot guarantee internal porosity, etc., which limits the cement-based wave transmission layer. Application of materials in actual building structures

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  • A kind of electromagnetic wave transmission composite material and its preparation method and application

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preparation example Construction

[0039] An embodiment of the present invention provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0040] (1) prepare alkali activator: water, water glass and sodium hydroxide are mixed, stir, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=(45~55 ):1:2;

[0041] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir evenly to obtain a mixed ash body, then add an alkali activator, and stir evenly to obtain the first alkali-activated slag Cementitious material; by mass ratio, fly ash: slag = (7:5) ~ (10:3), mixed ash body: alkali activator = 1: (0.4 ~ 0.5);

[0042] (3) Sodium bicarbonate is added in the epoxy resin glue, stir evenly, obtain mixture A; According to mass volume ratio, sodium bicarbonate: epoxy resin glue=2~3g:20~30mL;

[0043] (4) Wash the expanded polystyrene partic...

Embodiment 1

[0050] Embodiment 1 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0051] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=50: 1:2;

[0052] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:3, mixed ash body: alkali activator=1:0.4;

[0053] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=1g:10mL;

[0054] (4) Wash the expanded polystyrene particles with deionized water fo...

Embodiment 2

[0061] Embodiment 2 provides an electromagnetic wave transmission composite material, the preparation method of which includes the following steps:

[0062] (1) prepare alkali activator: mix water, water glass and sodium hydroxide, stir 8~10min, then leave standstill 24h, obtain alkali activator; By mass ratio, water: water glass: sodium hydroxide=45: 1:2;

[0063] (2) Preparation of the first alkali-activated slag cementitious material: add fly ash and slag to a slurry mixer, stir for 120-150 seconds to obtain a mixed ash body, then add an alkali activator, and stir for 4-5 minutes to obtain the first A kind of alkali-activated slag cementitious material; By mass ratio, fly ash: slag=7:5, mixed ash body: alkali activator=1:0.45;

[0064] (3) Sodium bicarbonate is added in the epoxy resin glue, stirs 3~5min, obtains mixture A; According to mass volume ratio, sodium bicarbonate:epoxy resin glue=2g:30mL;

[0065] (4) Wash the expanded polystyrene particles with deionized water...

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Abstract

The invention discloses an electromagnetic wave transmission composite material and its preparation method and application. The electromagnetic wave transmission composite material uses fly ash and slag as excited materials, reacts with an alkali activator to form a gelling material, and adds the Modified modified expanded polystyrene particles, foam stabilizer and blowing agent. The electromagnetic wave transmission composite material of the present invention has a porous structure, not only has high electromagnetic wave transmission rate, excellent electromagnetic wave transmission performance, but also has good mechanical properties, high compressive strength, good frost resistance and corrosion resistance, and is not easy to collapse. The porosity is stable, the preparation cost is low, environmental protection and pollution-free, and has good application prospects in building wave-absorbing materials. The electromagnetic wave transmission layer on the surface of the wave-absorbing material is prepared by using the electromagnetic wave-transmitting composite material of the present invention, which can effectively improve the impedance characteristics of the surface of the wave-absorbing material, allow more electromagnetic waves to be incident into the interior of the wave-absorbing material, and reduce the resistance of the surface of the wave-absorbing material to electromagnetic waves. Reflectivity.

Description

technical field [0001] The invention relates to a composite material, in particular to an electromagnetic wave transmission composite material and its preparation method and application. Background technique [0002] With the rapid development of the information society and the widespread use of electronic machines, the density of electromagnetic radiation in urban living spaces is increasing. While electronic products and technologies have brought great convenience to people, they have also brought harm. Studies have shown that working and living under electromagnetic radiation conditions for a long time will cause harm to people's physical and mental health. In addition, electromagnetic radiation will interfere with electronic machines, cause malfunctions of electronic machines, affect the normal operation of the machine, and even cause serious accidents and hazards. It will also affect the reception of radio and television, cause information leakage, and cause serious in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/08C04B38/10C04B111/40
CPCC04B28/08C04B38/10C04B2111/40C04B16/08C04B2103/48
Inventor 赵若红梅超徐安傅继阳刘爱荣吴玖荣
Owner GUANGZHOU UNIVERSITY
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