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A kind of resin wave-absorbing coating and preparation method thereof

A technology of wave-absorbing paint and resin, applied in epoxy resin paint, radiation-absorbing paint, coating, etc., can solve the problems of poor wave-absorbing performance of wave-absorbing paint, limited application range, narrow frequency band, etc. The effect of uneven and easy to agglomerate, low cost and wide absorption frequency band

Active Publication Date: 2019-12-24
SHANDONG OBO NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the research of many microwave-absorbing materials, microwave-absorbing coatings have received widespread attention from researchers in the field due to their wide application range and flexible application forms. The absorbing agents in the prior art mainly include ferrite absorbing materials, carbon fiber structure absorbing materials, nano absorbing materials, chiral absorbing materials, polycrystalline iron fiber absorbing materials and conductive polymer absorbing materials, etc. , but these absorbing materials still have many shortcomings such as narrow frequency band, low efficiency, and high density, and their application range is limited to a certain extent, and the absorbing performance of the absorbing coating made from them is not good

Method used

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  • A kind of resin wave-absorbing coating and preparation method thereof
  • A kind of resin wave-absorbing coating and preparation method thereof

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preparation example Construction

[0074] The present invention also provides a preparation method of resin wave-absorbing coating, comprising the following steps:

[0075] A) after mixing graphene oxide and ferric oxide for the first time, obtain the composite material of graphene and ferric oxide;

[0076]B) After mixing the composite material of graphene and ferroferric oxide obtained in the above steps, resin, dispersant, anti-sedimentation agent and solvent, the resin wave-absorbing coating is obtained.

[0077] In the present invention, the selection and composition of raw materials required in the above-mentioned preparation process, as well as the corresponding optimization principles, can correspond to the selection and composition of the corresponding raw materials in the aforementioned resin wave-absorbing coating, as well as the corresponding optimization principles, and will not be repeated here Let me repeat them one by one.

[0078] In the present invention, firstly, the composite material of gr...

Embodiment 1

[0127] Graphene / Ferric Oxide Composite

[0128]1. Prepare a graphene oxide aqueous solution, and obtain a 0.1mg / ml graphene oxide dispersion solution after ultrasonic dispersion treatment; then prepare a ferrous sulfate aqueous solution with a concentration of 0.2mol / L;

[0129] 2. Heat the graphene oxide dispersion solution in step 1 to 50°C and continue ultrasonication for 30 minutes, slowly add the ferrous sulfate aqueous solution to the graphene oxide dispersion solution at a rate of 5ml / min to obtain a precursor mixed solution;

[0130] 3. Heat the precursor mixed solution in step 2 to 90°C and continue ultrasonication for 30 minutes, add 30ml of 0.1mol / L sodium hydroxide aqueous solution, and adjust the pH of the system to 10;

[0131] 4. After the reaction system was kept at 90°C and the ultrasonic reaction was continued for 120 minutes, the reaction product was obtained, and after magnetic separation several times, it was vacuum-dried at 60°C for 8 hours, and the black...

Embodiment 2

[0138] In terms of weight percentage, first add 20.7% xylene and 34.5% graphene / iron tetroxide composite material and mix and ultrasonically stir for 30 minutes, then add 0.5% polyvinylpyrrolidone and mix and stir for 10 minutes at a speed of 300r / min; 10.3% xylene and 27.6% epoxy resin DY128 medium-speed ultrasonic dispersion, then cast 5% carbon black, 0.5% MONORAL 3300 for 1500r / min high-speed dispersion, add 0.4% phthalate, then 900r / min low-speed dispersion, and then filter, paint and filter, blend and defoam and pack to get the finished product.

[0139] The application performance test of the wave-absorbing coating prepared in Example 2 of the present invention was carried out.

[0140] see figure 2 , figure 2 The section result diagram of the coating when the wave-absorbing coating prepared for the present invention is used. Depend on figure 2 It can be seen that the graphene / ferroferric oxide is densely arranged at the cross-section, showing a sheet state, and...

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Abstract

The invention provides a resin wave-absorbing coating, which comprises: a composite material of resin, graphene and ferric oxide, a dispersant, an anti-sedimentation agent and a solvent. The present invention creatively changes the way of adding graphene materials in the resin wave-absorbing coating. Firstly, the graphene and the hard material in the coating—ferric oxide are compounded to obtain a composite of graphene and ferric oxide. The material is then combined with other ingredients to obtain resinous absorbing coatings. The invention can not only solve the problem of graphene dispersion well, ensure the perfect performance of its excellent performance, solve the disadvantage of uneven mixing of flexible graphene materials in the coating system, but also realize the The uniform dispersion on the surface can better exert its performance; more importantly, it can be used in conjunction with specific components, so that the prepared wave-absorbing coating has thin film, high strength, strong wave-absorbing ability, wide wave-absorbing frequency band, and low cost. low and has broad application prospects.

Description

technical field [0001] The invention belongs to the technical field of wave-absorbing paint, and relates to a wave-absorbing paint and a preparation method thereof, in particular to a wave-absorbing paint containing a graphene / ferric oxide composite material and a preparation method thereof. Background technique [0002] Electromagnetic pollution refers to natural and artificial interference of various electromagnetic waves and harmful electromagnetic radiation. 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, which has reached the level of direct threat to human health. The alternating changes of electric and magnetic fields produce electromagnetic waves. The phenomenon of electromagnetic waves launching or sinking into the air is called electromagnetic radiation. Excessive electromagnetic radiation causes electromagnetic po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D1/00C09D163/00C09D5/32C09D7/61C09D7/63C09D7/65
CPCC08K2201/003C08K2201/011C08K2201/014C09D1/00C09D5/32C09D7/61C09D7/63C09D7/65C09D163/00C08L87/00C08K5/12C08K9/00C08K7/00C08K3/04C08K2003/2275
Inventor 赵永彬张在忠李伟铭刘海波
Owner SHANDONG OBO NEW MATERIAL CO LTD
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