Preparation method of half-carbonized iron phthalocyanine wave absorbing agent and wave absorbing agent and application of wave absorbing agent

A technology of semi-carbonized iron phthalocyanine and carbonized iron phthalocyanine, which is applied in chemical instruments and methods, organic chemistry, and other chemical processes, and can solve problems such as high cost, complicated preparation process, and high specific gravity, and achieve low specific gravity and high preparation efficiency. The method is simple and efficient, and the effect of specific gravity

Active Publication Date: 2015-02-04
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although there are many studies on microwave absorbing materials at home and abroad, the performance of traditional microwave absorbing materials cannot fully meet this requirement. For example, domestic scientific researcher Wang Meng et al. (Absorption properties of carbonyl-iron / carbon black double-layer microwave absorbers, Journal of Magnetism and Magnetic Materials, 2009, 321:3442–3446) clearly pointed out that ferrite absorbers have certain limitations, such as high cost, high specific weight, sintering and ball milling, and complicated preparation process.

Method used

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  • Preparation method of half-carbonized iron phthalocyanine wave absorbing agent and wave absorbing agent and application of wave absorbing agent
  • Preparation method of half-carbonized iron phthalocyanine wave absorbing agent and wave absorbing agent and application of wave absorbing agent
  • Preparation method of half-carbonized iron phthalocyanine wave absorbing agent and wave absorbing agent and application of wave absorbing agent

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preparation example Construction

[0038] Preparation of semi-carbonized iron phthalocyanine absorber:

[0039] 1) prepolymerization: with commercially available N-methylpyrrolidone as solvent, commercially available raw material bisphthalonitrile monomer and catalyst ferrocene formaldehyde are dissolved, wherein the bisphthalonitrile monomer in the solution The mass ratio is 94% to 98%, and the mass ratio of ferrocene formaldehyde is 2% to 6%. The mixed solution is heated at 200°C and refluxed for 4 hours, and then the solution is poured into distilled water and stirred, and the stirred Filtrate the precipitate precipitated in the phthalocyanine to obtain the iron phthalocyanine oligomer, wash the iron phthalocyanine oligomer with distilled water for 2 to 3 times, and then dry it;

[0040] 2) Curing: The iron phthalocyanine oligomer obtained in step 1) is cured under the curing program to obtain the iron phthalocyanine polymer. The curing program is: the initial temperature is 250 ° C, and the temperature is r...

Embodiment 1

[0044] 1) according to the mass ratio of two phthalonitrile monomers and ferrocene formaldehyde is 98:2 to take raw materials;

[0045] 2) Solution prepolymerization: Pour bisphthalonitrile monomer and ferrocene formaldehyde into a three-necked flask, add solvent N-methylpyrrolidone, heat, and reflux at 200°C for 4 hours;

[0046] 3) After the prepolymerization is finished, pour the solution into distilled water, stir, filter after precipitation, wash the filtrate, i.e. iron phthalocyanine oligomer, with distilled water for 2 to 3 times, and finally dry it;

[0047] 4) The dried sample was cured according to the program of constant temperature of 250°C for 4 hours, then constant temperature of 280°C for 4 hours, and then constant temperature of 300°C for 4 hours to form iron phthalocyanine polymer;

[0048] 5) Under nitrogen atmosphere, divide the iron phthalocyanine polymer obtained in step 4) into 3 groups for pyrolysis. The initial temperature of the cracking program is 300...

Embodiment 2

[0051] 1) according to the mass ratio of two phthalonitrile monomers and ferrocene formaldehyde is 98:2 to take raw materials;

[0052] 2) Solution prepolymerization: Pour bisphthalonitrile monomer and ferrocene formaldehyde into a three-necked flask, add solvent N-methylpyrrolidone, heat, and reflux at 200°C for 4 hours;

[0053] 3) After the prepolymerization is finished, pour the solution into distilled water, stir, filter after precipitation, wash the filtrate, i.e. iron phthalocyanine oligomer, with distilled water for 2 to 3 times, and finally dry it;

[0054] 4) The dried sample was cured according to the program of constant temperature of 250°C for 4 hours, then constant temperature of 280°C for 4 hours, and then constant temperature of 300°C for 4 hours to form iron phthalocyanine polymer;

[0055] 5) Under a nitrogen atmosphere, the iron phthalocyanine polymer was pyrolyzed at a high temperature. The pyrolysis program was an initial temperature of 300°C, then raised ...

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Abstract

The invention discloses a preparation method of an electromagnetic wave absorbing material, in particular relates to preparation of a wave absorbing agent based on diphthalonitrile resin, and discloses the wave absorbing agent and application of the wave absorbing agent. The wave absorbing agent is prepared as follows: an iron phthalocyanine polymer is obtained by addition and solidification of diphthalonitrile with good thermostability and oxidation stability under the catalysis of ferrocene carboxaldehyde, high temperature pyrolyzing of the iron phthalocyanine polymer is performed, and the pyrolyzing degree is controlled to obtain the wave absorbing agent comprising amorphous carbon, the iron phthalocyanine polymer, iron particles and iron carbon compounds, and the wave absorbing agent is good in wave absorbing performanceand low in cost, and has a good application prospect.

Description

technical field [0001] The invention relates to a preparation method of an electromagnetic wave absorbing material, in particular to the preparation of a wave absorbing agent based on bisphthalonitrile resin. The invention also relates to the wave absorbing agent and its application. Background technique [0002] With the rapid development of avionics technology and radar detection technology, weapon systems and strategic targets on the battlefield are facing serious threats. As an effective means to improve the survivability of weapon systems, stealth technology has been highly valued by the military fields of all countries in the world. Radar stealth technology is a technology that weakens, suppresses, absorbs, and deflects target radar waves to reduce its radar cross section (RCS), making it difficult for enemy radars to identify and detect within a certain range. One of the technical approaches is to apply materials that can absorb radar waves on the radar detection targ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C07D487/22
Inventor 雷雅杰刘涛芦艾贺江平王宪忠孙素明徐翔
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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