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Preparation method of green electromagnetic shielding building material

A technology for electromagnetic shielding and building materials, applied in the fields of magnetic field/electric field shielding, nanotechnology for materials and surface science, electrical components, etc., which can solve the problems of difficult to meet the needs of use, high density of absorbing materials, and poor high temperature characteristics. , to achieve the effect of easy industrialized large-scale production, good absorbing performance, and improved high temperature characteristics

Inactive Publication Date: 2020-11-17
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The invention provides a preparation method of green electromagnetic shielding building materials, which solves the problems of high density of absorbing materials, poor high-temperature characteristics, and insufficient environmental protection in traditional electromagnetic shielding building materials, which are difficult to meet people's use needs

Method used

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  • Preparation method of green electromagnetic shielding building material
  • Preparation method of green electromagnetic shielding building material
  • Preparation method of green electromagnetic shielding building material

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no. 1 example

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Please refer to figure 1 , figure 2 , image 3 and Figure 4 ,in, figure 1 SEM schematic diagram of graphene oxide nanobelt in the preparation method of the green electromagnetic shielding building material provided by the invention; figure 2 In the preparation method of the green electromagnetic shielding building material provided by the present invention, the SEM schematic diagram of the graphene oxide nanoribbons supported by nano ferric oxide particles; image 3 For the preparation method of the green electromagnetic shielding building material provided by the present invention, the SEM schematic diagram of the graphene nanoribbons supported by nano ferric oxide particles; Figure 4 It is a simulated diagram of electromagnetic wave reflectivity at 2-14 GHz of continuous thickness samples in the preparation method of green electromagne...

no. 2 example

[0052] Based on the first embodiment of the present invention, a method for preparing a green electromagnetic shielding building material, the second embodiment of the present invention provides another method for preparing a green electromagnetic shielding building material, wherein the second embodiment does not hinder the first An independent implementation of the technical solution of an embodiment.

[0053] Concretely, the present invention provides another kind of preparation method of green electromagnetic shielding building material difference in that:

[0054] The difference between this embodiment and the first embodiment is that in S5, the molar ratio of ferroferric oxide and graphene oxide nanobelts is 2:1, and an appropriate amount of FeCl is weighed respectively. 3 Crystals and FeCl 2 The crystal is the same as the first embodiment, and the finally obtained sample is F:G=2:1.

no. 3 example

[0056] Based on the preparation method of a green electromagnetic shielding building material in the first embodiment of the present invention, the third embodiment of the present invention provides another preparation method of a green electromagnetic shielding building material, wherein the third embodiment does not hinder the preparation method of the first green electromagnetic shielding building material. An independent implementation of the technical solution of an embodiment.

[0057] Concretely, the present invention provides another kind of preparation method of green electromagnetic shielding building material difference in that:

[0058] The difference between this embodiment and the first embodiment is that in S5, the molar ratio of ferroferric oxide and graphene oxide nanobelts is 4:1, and an appropriate amount of FeCl3 crystals and FeCl2 crystals are weighed respectively, and other details are implemented in the first embodiment Similarly, the final sample obtain...

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Abstract

The invention provides a preparation method of a green electromagnetic shielding building material, which comprises the following operation steps: selecting a proper amount of carbon nanotubes, and cutting the carbon nanotubes by a chemical longitudinal cutting method. Nano Fe3O4 particles and graphene oxide nanobelts are compounded to prepare a ferroferric oxide-graphene oxide nanobelt compositematerial, the ferroferric oxide-graphene oxide nanobelt composite material is reduced to obtain a Fe3O4-graphene nanobelt composite material; and the ferroferric oxide-graphene nanobelt composite material with different Fe3O4 loading capacities is prepared by adjusting the Fe3O4 loading capacity. The wave-absorbing performance of the material with the continuous thickness of 0.5 mm and 5 mm is calculated, the wave-absorbing performance of the material with the ratio of F to G being 1: 1 and the wave-absorbing performance of the material with the ratio of 2: 1 are the best, and the optimal loading capacity and the optimal thickness of Fe3O4 can be determined. The green electromagnetic shielding building material has the characteristics of light weight and wide wave absorption, and is convenient for industrial large-scale production. The material can be used in a multimedia indoor venue with a large number of electronic devices, not only can protect the health of visitors, but also can improve the visiting experience.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a preparation method of a green electromagnetic shielding building material. Background technique [0002] Building materials are various materials used in construction engineering. There are many kinds of building materials, which can be roughly divided into: inorganic materials, which include metal materials and non-metal materials, such as natural stone, burnt earth products, cement, concrete and silicate Products, etc.; organic materials, which include plant materials, synthetic polymer materials and asphalt materials, and composite materials, which include asphalt concrete, polymer concrete, etc., which are generally composed of inorganic non-metallic materials and organic materials. [0003] Electromagnetic shielding material belongs to a new type of building material, mainly used in the filler of conductive polymer materials. Ferrite in traditional electromagnetic shieldi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01B32/184B82Y40/00B82Y30/00H05K9/00
CPCB82Y30/00B82Y40/00C01G49/08C01P2004/03C01P2004/80C01B32/184H05K9/0081
Inventor 潘沪生张烈杨寒冰曹四喜
Owner TSINGHUA UNIV
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