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Preparation method and application of microwave absorbing composite material used as coating or packing layer

A composite material and filling layer technology, which is applied in chemical instruments and methods, and other chemical processes, can solve the problems of narrow microwave absorption bandwidth, single absorption frequency band, and low absorption decibels, and achieve widening of microwave absorption bandwidth, absorption Excellent wave performance, the effect of improving the wave absorption decibel

Inactive Publication Date: 2014-08-06
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of single absorbing frequency band, narrow absorbing bandwidth and low absorbing decibels in the microwave-absorbing composite materials prepared in the prior art, and provide a kind of microwave-absorbing composite materials used as coating or filling layer. Preparation method and application

Method used

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  • Preparation method and application of microwave absorbing composite material used as coating or packing layer
  • Preparation method and application of microwave absorbing composite material used as coating or packing layer

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specific Embodiment approach 1

[0031] Specific implementation mode 1: This implementation mode is a preparation method of a wave-absorbing composite material as a coating or filling layer, which is completed according to the following steps:

[0032] 1. Preparation of polyethylene glycol 6000 / dispersion solvent mixture: mix polyethylene glycol 6000 with dispersion solvent, and stir for 15min to 30min under the condition of rotating speed of 200r / min~400r / min to obtain polyethylene glycol 6000 / Dispersed solvent mixture;

[0033] The concentration of polyethylene glycol 6000 in the polyethylene glycol 6000 / dispersion solvent mixture described in step 1 is 0.01g / mL~0.1g / mL;

[0034] 2. Preparation of mixed solution A: Add carbon nanotubes, lanthanum oxide powder with a particle size of 20nm to 60nm, metal nickel powder with a particle size of 1 μm to 3 μm, and ytterbium oxide powder with a particle size of 2 μm to 4 μm to polyethylene glycol 6000 / dispersion solvent mixed solution to obtain mixed solution A; ...

specific Embodiment approach 2

[0052] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the dispersion solvent described in step one is absolute ethanol, acetone, 1-methyl-2-pyrrolidone, dimethyl sulfoxide or dimethyl formaldehyde amides. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0053] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the carbon nanotubes described in step 2 are single-walled carbon nanotubes or multi-walled carbon nanotubes. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method and application of the microwave absorbing composite material used as coating or a packing layer and relates to a preparation method and application of a microwave absorbing composite material. The preparation method is used for solving the problem that a microwave absorbing composite material prepared by adopting the prior art is single in microwave absorbing frequency, narrow in microwave absorbing bandwidth and low in microwave absorbing decibel. The preparation method of the microwave absorbing composite material comprises the following steps: firstly, preparing a polyethylene glycol 600 / dispersing solvent mixed liquor; secondly, preparing a mixed liquor A; thirdly, carrying out ball milling; fourthly, carrying out ultrasonic treatment; fifthly, preparing a mixture B; sixthly, carrying out ultrasonic treatment; seventhly, solidifying and curing. The microwave absorbing composite material used as the coating or packing layer can be taken as a coating coated on the surface of a composite material or a packing layer packed into an interlayer of a composite material structure. The prepared microwave absorbing composite material used as the coating or packing layer has obvious microwave absorbing property and can be applied to the fields of aviation, communication and military. By adopting the preparation method provided by the invention, the microwave absorbing composite material used as the coating or packing layer can be obtained.

Description

technical field [0001] The invention relates to a preparation method and application of a wave-absorbing composite material. Background technique [0002] The so-called absorbing material refers to a class of materials that can absorb the energy of electromagnetic waves projected onto its surface. With the development of modern science and technology, the influence of electromagnetic wave radiation on the environment and people's body is increasing day by day, which has adverse effects on the concealment of military facilities. Finding a material that can resist and weaken electromagnetic radiation has become a major topic in material science. [0003] Traditional absorbing materials are divided into coating type and structural type. At present, the coating of most coated absorbing materials is mainly ferrite. Although ferrite has relatively excellent wave-absorbing performance, its wave-absorbing frequency band is relatively high, and it is not sensitive to low-frequency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/00C08K7/00C08K3/04C08K3/22C09K3/00
Inventor 何亚飞王荣国郝立峰陆小龙矫维成杨帆刘文博
Owner HARBIN INST OF TECH
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