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Ferrite-graphene modified polycarboxyl pyrrole wave-absorbing material and preparation method thereof

A technology of graphene modification and wave-absorbing materials, which is applied in the direction of electrical components, magnetic field/electric field shielding, etc., can solve the problem of poor electromagnetic impedance matching performance of wave-absorbing materials, low relative complex permittivity of polypyrrole, and inability to effectively absorb electromagnetic waves and other problems, to achieve the effect of enhancing electromagnetic impedance matching performance, promoting cyclic migration, and high resistivity

Inactive Publication Date: 2019-11-26
厦门珉瑶贸易有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a ferrite-graphene modified polycarboxypyrrole absorbing material and its preparation method, which solves the poor magnetic permeability performance of the existing polypyrrole absorbing material, The electromagnetic attenuation coefficient is low, which cannot effectively absorb and attenuate the incident electromagnetic wave. At the same time, it solves the problem that the relative complex dielectric constant of polypyrrole is low, which leads to poor conductivity of the wave-absorbing material, which affects the dielectric constant and magnetic properties. The balance of the conductivity makes the electromagnetic impedance matching performance of the absorbing material poor

Method used

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  • Ferrite-graphene modified polycarboxyl pyrrole wave-absorbing material and preparation method thereof

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preparation example Construction

[0026] In order to achieve the above object, the present invention provides the following technical solution: a ferrite-graphene modified polycarboxypyrrole wave-absorbing material and its preparation method, including the following raw materials in parts by weight: 20-23 parts of hexahydrate three Ferric chloride, 4-6 parts of anhydrous aluminum sulfate, 5-7 parts of cobalt chloride hexahydrate, 15-17 parts of oxalic acid, 30-34 parts of pyrrole, 1-3 parts of synergistic catalyst, 10-25 parts of graphene , ferric chloride hexahydrate as FeCl 3 ·6H 2 O, where FeCl 3 The mass fraction is 56.2-58.4%, Al in anhydrous aluminum sulfate 2 (SO 4 ) 3 The mass fraction is 97.3-98.8%, cobalt chloride hexahydrate is CoCl 3 ·6H 2 O, where CoCl 3 The mass fraction is 50.6-52.2%, the simplified structural formula of oxalic acid is COOH-COOH, wherein the mass fraction of COOH-COOH is 96.8-99.2%, and the structural formula of pyrrole is Its mass fraction is 96.5-98.8%, and the synerg...

Embodiment 1

[0033] (1) Preparation of CoAl ferrite Co 0.65-0.85 Al 0.15-0.35 Fe 2 o 4 : Add 300mL of N-methylpyrrolidone and 400mL of distilled water into a 1000mL beaker, then weigh 20 parts of ferric chloride hexahydrate, 4 parts of anhydrous aluminum sulfate and 5 parts of cobalt chloride hexahydrate into the beaker, and stir the materials evenly Finally, place the beaker in an ultrasonic processor, heat it to 60-65°C, and ultrasonic frequency is 28KHz, and perform ultrasonic treatment for 4-5 hours, so that the material is evenly dispersed in the solvent to form a sol, and then the mixture in the beaker is filtered to remove the solvent , and washed with 3000-3500mL distilled water. After drying the water, place the mixed material in a tubular resistance furnace at a heating rate of 10°C / min, heat it to 750-760°C for 4-5h, and heat it to Carry out annealing for 3-4 hours. After the annealing is completed, cool the material to room temperature, and then use 500-700mL of dilute hydro...

Embodiment 2

[0039] 1) Preparation of CoAl ferrite Co 0.65-0.85 Al 0.15-0.35 Fe 2 o 4 : Add 300mL of N-methylpyrrolidone and 400mL of distilled water to a 1000mL beaker, then weigh 21 parts of ferric chloride hexahydrate, 4 parts of anhydrous aluminum sulfate and 6 parts of cobalt chloride hexahydrate in the beaker, and stir the materials evenly Finally, place the beaker in an ultrasonic processor, heat it to 60-65°C, and ultrasonic frequency is 28KHz, and perform ultrasonic treatment for 4-5 hours, so that the material is evenly dispersed in the solvent to form a sol, and then the mixture in the beaker is filtered to remove the solvent , and washed with 3000-3500mL distilled water. After drying the water, place the mixed material in a tubular resistance furnace at a heating rate of 10°C / min, heat it to 750-760°C for 4-5h, and heat it to Carry out annealing for 3-4 hours. After the annealing is completed, cool the material to room temperature, and then use 500-700mL of dilute hydrochlor...

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Abstract

The invention relates to the technical field of polypyrrole wave-absorbing materials, and discloses a ferrite-graphene modified polycarboxyl pyrrole wave-absorbing material and a preparation method thereof. The formula of the ferrite-graphene modified polycarboxyl pyrrole wave-absorbing material comprises the following experimental raw materials: ferric trichloride hexahydrate, anhydrous aluminumsulfate, cobalt chloride hexahydrate, oxalic acid, pyrrole, a synergistic catalyst, graphene and the like. CoAl ferrite Co0.65-0.85Al0.15-0.35Fe2O4 is added to modify polypyrrole, and Fe and Al have excellent electrical conductivity, so the conductivity of the wave-absorbing material is improved; when the wave-absorbing material senses an external magnetic field, a mass induced current can be generated, and an induction magnetic field opposite to the external magnetic field is generated, so the absorbing and shielding effects on electromagnetic waves are achieved; and Co has the magnetic advantages of high resistivity and low high-frequency loss, so the eddy current loss of the magnetic loss in the high frequency band of ferrite is effectively improved when the external magnetic field andthe metal Co compound form interactive resonance.

Description

technical field [0001] The invention relates to the technical field of polypyrrole wave-absorbing materials, in particular to a ferrite-graphene modified polycarboxypyrrole wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of the economy and the great progress of science and technology, electronic communication technology has developed rapidly. Due to the development of radio, television, and microwave technology, the power of radio frequency equipment has doubled, and the electromagnetic radiation on the ground has increased significantly, making electromagnetic waves useless. Everywhere, the interactive changes of the electric field and the magnetic field generate electromagnetic waves. The phenomenon of electromagnetic waves launching or sinking into the air is called electromagnetic radiation. Excessive electromagnetic radiation causes electromagnetic pollution to the extent that it directly threatens human ...

Claims

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Application Information

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IPC IPC(8): C08L79/04C08K3/04C08K3/22C08G73/06H05K9/00
CPCC08G73/0611C08K3/22C08K3/042H05K9/0081C08L79/04
Inventor 马海龙郭臣唐阔海
Owner 厦门珉瑶贸易有限公司
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