A kind of petroleum asphalt/ferric oxide composite wave absorbing agent and its preparation method, wave absorbing material

A technology of ferric tetroxide and petroleum asphalt, which is used in building thermal insulation materials, magnetic field/electric field shielding, building components, etc. Conductivity, enhanced magnetic loss performance, stable modification effect

Active Publication Date: 2022-03-01
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the absorbing material made of petroleum asphalt has a thicker coating and a narrower effective absorbing bandwidth, and the absorbing performance needs to be improved

Method used

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  • A kind of petroleum asphalt/ferric oxide composite wave absorbing agent and its preparation method, wave absorbing material
  • A kind of petroleum asphalt/ferric oxide composite wave absorbing agent and its preparation method, wave absorbing material
  • A kind of petroleum asphalt/ferric oxide composite wave absorbing agent and its preparation method, wave absorbing material

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preparation example Construction

[0024] The invention provides a preparation method of a petroleum asphalt / ferric oxide composite wave absorbing agent, comprising the following steps: pyrolyzing a mixture of petroleum asphalt and sodium chloride to obtain pyrolyzed asphalt;

[0025] Ferric chloride hexahydrate, anhydrous acetate, polyethylene glycol, ethylene glycol and pyrolysis asphalt are mixed, and the obtained mixed solution is subjected to solvothermal reaction to obtain a petroleum asphalt / ferric oxide composite wave absorbing agent.

[0026] In the present invention, unless otherwise specified, the raw materials used are commercially available products well known in the art.

[0027] The invention pyrolyzes the mixture of petroleum asphalt and sodium chloride to obtain pyrolysis asphalt.

[0028] In the present invention, the mass ratio of the petroleum pitch to sodium chloride is preferably 1:4. Prior to pyrolysis, the present invention preferably ball mills the mixture of petroleum pitch and sodium...

Embodiment 1

[0049] After weighing 0.5g of powdered petroleum pitch and 2g of sodium chloride, pour the two powders into a ball mill tank, and ball mill for 9 hours under dry milling conditions. After the ball milling, take out the powder and transfer it to a tube furnace for pyrolysis , the temperature is 900°C, and Ar gas is used throughout the experiment. After the experiment is over, the instrument is turned off to allow the entire device to cool down to room temperature naturally, and the powder is taken out;

[0050] The obtained powder was repeatedly rinsed with deionized water, and then placed in a drying oven for drying treatment. The temperature was set at 80°C, and the drying time was 18 hours. After drying, pyrolysis pitch was obtained;

[0051] Weigh 3.2g of anhydrous sodium acetate, 1g of polyethylene glycol-2000, 0.26g of ferric chloride hexahydrate and 300mg of pyrolyzed asphalt and disperse them into a beaker containing 40mL of ethylene glycol, and stir thoroughly at a temp...

Embodiment 2

[0053] After weighing 0.5g of powdered petroleum pitch and 2g of sodium chloride, pour the two powders into a ball mill tank, and ball mill for 9 hours under dry milling conditions. After the ball milling, take out the powder and transfer it to a tube furnace for pyrolysis , the temperature is 900°C, and Ar gas is used throughout the experiment. After the experiment is over, the instrument is turned off to allow the entire device to cool down to room temperature naturally, and the powder is taken out;

[0054] The obtained powder was repeatedly rinsed with deionized water, and then placed in a drying oven for drying treatment. The temperature was set at 80°C, and the drying time was 18 hours. After drying, pyrolysis pitch was obtained;

[0055] Weigh 3.2g of anhydrous sodium acetate, 1g of polyethylene glycol-2000, 0.52g of ferric chloride hexahydrate and 300mg of pyrolytic pitch and disperse them into a beaker filled with 40mL of ethylene glycol, and stir thoroughly at a tempe...

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Abstract

The invention provides a petroleum asphalt / ferric oxide composite wave absorbing agent, a preparation method thereof, and a wave absorbing material, which belong to the technical field of electromagnetic wave absorbing materials. In the present invention, after the petroleum asphalt and sodium chloride are pyrolyzed, the pyrolyzed asphalt obtained is a hydrocarbon rich in polycyclic aromatic hydrocarbons and has a porous nanosheet structure, which is conducive to improving the conductivity of the petroleum asphalt, and then combined with six Ferric chloride hydrate undergoes solvothermal reaction, and iron ferric oxide nanoparticles are formed during the solvothermal reaction process, which can effectively and stably modify petroleum asphalt. The conductive loop further enhances the magnetic loss performance of the composite material itself.

Description

technical field [0001] The invention relates to the technical field of electromagnetic wave-absorbing materials, in particular to a petroleum pitch / ferric iron tetroxide composite wave-absorbing agent, a preparation method thereof, and a wave-absorbing material. Background technique [0002] With the rapid development of modern science and technology, the derived electromagnetic radiation has caused many complex problems such as electromagnetic pollution, electromagnetic interference, information leakage, etc., hindering the development of information industry, electronics industry and other fields; for national defense construction, especially microwave electronic technology With the emergence of advanced radar and advanced radar, stealth, as an effective means to improve the survival, penetration and depth capabilities of weapon systems, has become a hot spot in the world's military powers competing for military high-tech fields. Therefore, the development of materials tha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08K3/22C08K3/04C08L91/06H05K9/00
CPCC08K3/22C08K3/04C08L91/06H05K9/0081C08K2003/2275C08K2201/011C08L95/00
Inventor 王廷梅马巍王齐华谢海
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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