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Photocuring microwave absorbing coating with barium ferrite doped with polypyrrole as wave absorber

A technology of barium ferrite and wave-absorbing coatings, applied in radiation-absorbing coatings, polyurea/polyurethane coatings, coatings, etc., can solve the problems of narrow absorption frequency band of conductive high polymer materials, and achieve excellent mechanical properties and weather resistance performance, simple production process, widening absorption band effect

Active Publication Date: 2013-07-17
GUANGZHOU SHENWEI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In an earlier study, it was shown that a single conductive polymer material has a narrow absorption band

Method used

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  • Photocuring microwave absorbing coating with barium ferrite doped with polypyrrole as wave absorber
  • Photocuring microwave absorbing coating with barium ferrite doped with polypyrrole as wave absorber
  • Photocuring microwave absorbing coating with barium ferrite doped with polypyrrole as wave absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Preparation of barium ferrite doped polypyrrole absorber

[0023] Dissolve 1 g of ammonium persulfate (APS) solution in 30 mL of 0.1 mol / L hydrochloric acid and put it in the refrigerator for later use.

[0024] 0.48g of barium ferrite BaFe 12 o 19 (BaF 2 ) and 3.48g of sodium dodecylbenzenesulfonate (DBSA) were added to a 100mL0.1mol / L hydrochloric acid flask, ultrasonically dispersed for 1h, then 7mL of pyrrole (Py) was added, and then ultrasonically dispersed for 1h to obtain a uniformly dispersed The solution. Keep the solution at 0-2°C in an ice-water bath, slowly add 30mL of ammonium persulfate hydrochloric acid solution dropwise therein, drop it in about 15 minutes, and keep the reaction temperature at 0-2°C for 12h. After the reaction is completed, filter with suction, wash with a large amount of ethanol and deionized water until the filtrate is colorless, dry the reaction product in vacuum at 60°C for 24 hours, and grind it evenly to obtain barium ferrite-d...

Embodiment 2

[0034] The preparation of barium ferrite-doped polypyrrole absorber is as in Example 1.

[0035] Preparation of paint:

[0036]The mass ratio formula of 200g specification paint components is: 45% (90g) of hexafunctional aliphatic urethane acrylate, 25% (50g) of tripropylene glycol diacrylate as monomer diluent; 5% of trimethylolpropane triacrylate (10g); barium ferrite BaFe 12 o 19 Doped polypyrrole absorber 20% (40g); 1173 photoinitiator 4% (8g); defoamer (modified polysiloxane-cyclohexanone / aromatic hydrocarbon solvent) and leveling agent (poly Acrylate solution) each 0.5% (1g). According to the proportion of the formula, hexafunctional aliphatic urethane acrylate, monomer diluent tripropylene glycol diacrylate, barium ferrite BaFe 12 o 19 Doped with polypyrrole wave absorber, triacrylate adhesion promoter, photoinitiator, defoamer and leveling agent and mixed uniformly to make light-cured wave absorbing coating.

[0037] The coating can be applied to the magnesium-al...

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Abstract

The invention discloses a photocuring microwave absorbing coating with barium ferrite doped with polypyrrole as a wave absorber. The barium ferrite doped with polypyrrole as the wave absorber is prepared by in situ polymerization. The wave absorbing material is uniformly mixed with six degree of functionality aliphatic polyurethane acrylate, a monomer diluent tripropylene glycol diacrylate, an accelerant, an optical initiator, a defoamer and a leveling agent to prepare the photocuring microwave absorbing material. The wave absorbing material is quickly cured through UV-irradiation, and the wave absorbing coating obtained has the properties of good adhesive force, hardness, weather fastness and the like.

Description

technical field [0001] The invention relates to a wave absorbing agent prepared by inorganic-organic doping, which is cured into a film through ultraviolet light curing, and belongs to the field of electromagnetic wave absorbing materials. technical background [0002] At present, with the development of the electronic industry, various electronic devices are increasing day by day, and electromagnetic wave pollution is also becoming more and more serious. At the same time, radar is widely used as a mature military detection method, and the research on stealth technology for it has become the research focus of relevant institutions at home and abroad. Regardless of civilian or military use, the demand for electromagnetic wave absorbing materials is more urgent. [0003] Absorbing absorbing materials refer to a class of materials that can convert incident electromagnetic waves into other forms of energy and dissipate them through their own absorption, thereby reducing the ref...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D5/32C08G73/06C08K3/22
Inventor 曹朝贵冯杰姜许钟荣
Owner GUANGZHOU SHENWEI NEW MATERIAL TECH
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