Electromagnetic shielding cement board and semi-dry preparation process thereof

A technology of electromagnetic shielding and preparation technology, which is applied in the field of cement boards, can solve the problems of rising raw material costs, high prices, and high prices of cement boards, and achieve the effects of reducing volume shrinkage and cracking, low porosity, and low water absorption

Active Publication Date: 2019-06-07
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Yet the present invention thinks, the wood fiber of my country mainly relies on import at present, and the price is higher, and the cost of raw materials rises, and the price of the cement board made is higher

Method used

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  • Electromagnetic shielding cement board and semi-dry preparation process thereof
  • Electromagnetic shielding cement board and semi-dry preparation process thereof
  • Electromagnetic shielding cement board and semi-dry preparation process thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] 1. An electromagnetic shielding cement board, comprising material A and solution B. In parts by weight, said material A comprises the following raw materials: 60 parts of Portland cement, 8 parts of glass fiber, 3 parts of silica fume, 12 parts of fly ash Parts, polyvinylpyrrolidone (molecular weight is 2.0×10 4 ) 1.5 parts; the solution B is made up of the following raw materials in parts by weight: 95 parts of water, 3 parts of KH550 type silane coupling agent, ferroferric oxide modified graphene oxide (GO-Fe 3 o 4 ) 0.1 part, wherein; the GO-Fe 3 o 4 The loading amount of ferric oxide in the medium is 5% (mol fraction).

[0047] 2. In the present embodiment, the preparation method of the modified graphene oxide by ferric oxide is as follows: (1) dilute the graphene oxide solution to 0.5mg / ml, then add ferric oxide to graphene oxide in proportion In the solution, the obtained mixed solution was placed in a magnetic stirrer with a water bath heating function and st...

Embodiment 2

[0054] 1. An electromagnetic shielding cement board, comprising material A and solution B. In parts by weight, said material A comprises the following raw materials: 70 parts of Portland cement, 5 parts of glass fiber, 6 parts of silica fume, 5 parts of fly ash Parts, polyvinylpyrrolidone (molecular weight is 3.4×10 4 ) 1.2 parts; the solution B is made up of the following raw materials in weight parts: 98 parts of water, 5 parts of KH550 type silane coupling agent, ferroferric oxide modified graphene oxide (GO-Fe 3 o 4 ) 0.15 parts, wherein; the GO-Fe 3 o 4 The loading amount of ferric oxide in the medium is 2% (mol fraction).

[0055] 2. In the present embodiment, the preparation method of the modified graphene oxide by ferric oxide is as follows: (1) dilute the graphene oxide solution to 0.3 mg / ml, and then add ferric oxide to graphene oxide in proportion In the solution, the obtained mixed solution was placed in a magnetic stirrer with a water bath heating function and...

Embodiment 3

[0062] 1. An electromagnetic shielding cement board, comprising material A and solution B. In parts by weight, said material A comprises the following raw materials: 50 parts of Portland cement, 10 parts of glass fiber, 7 parts of silica fume, and 10 parts of fly ash Parts, polyvinylpyrrolidone (molecular weight is 1.3×10 4 ) 0.5 part; the solution B is made up of the raw materials of following weight parts: 92 parts of water, 6 parts of KH550 type silane coupling agent, ferroferric oxide modified graphene oxide (GO-Fe 3 o 4 )0.05 part, wherein; the GO-Fe 3 o 4 The loading amount of ferric oxide in the medium is 7% (mol fraction).

[0063]2. In the present embodiment, the preparation method of the modified graphene oxide by ferric oxide is as follows: (1) dilute the graphene oxide solution to 0.4 mg / ml, and then add ferric oxide to graphene oxide in proportion In the solution, the obtained mixed solution was placed in a magnetic stirrer with a water bath heating function a...

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Abstract

The invention belongs to the technical field of production of a cement board, and particularly relates to a cement board which has an electromagnetic shielding function and is prepared by adopting a semi-dry method. The electromagnetic shielding cement board comprises a material A and a solution B, wherein the material A comprises the following raw materials in parts by weight: 5-70 parts of cement, 5-10 parts of glass fibers, 3-7 parts of silica fume, 5-15 parts of fly ash and 0.3-1.5 parts of polyvinylpyrrolidone. The solution B is prepared from the following raw materials in parts by weight: 90 to 98 parts of water, 1 to 6 parts of silane coupling agent and 0.05 to 0.15 part of Fe3O4-modified graphene oxide. The cement board is low in water content, high in density, low in porosity, lowin water absorption rate, excellent in breaking strength and good in anti-freezing performance, and has good mechanical properties and excellent shielding performance. The product can completely meetthe performance requirements when the cement board is used as a decorative board and an external wall board, and has wide application potential.

Description

technical field [0001] The invention belongs to the technical field of cement board preparation, in particular to a cement board prepared by a semi-dry method with electromagnetic shielding function. Background technique [0002] With the rapid development of wireless communication technology, electromagnetic wave radiation pollution has become an increasingly serious pollution problem after noise pollution and light pollution. issues such as decline. Electromagnetic radiation can also cause information leakage, affect information security, and also affect the normal operation of other electronic equipment, which can easily cause deviation or even malfunction of equipment, and directly or indirectly cause economic losses. [0003] At present, most of them add metal powder, carbon fiber or other conductive materials to the concrete to play the role of electromagnetic shielding. For example, patent document 201511015421.2 discloses an electromagnetic shielding concrete. , ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
Inventor 芦令超闫振李来波黄世峰程新
Owner UNIV OF JINAN
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