CN116855121A - Preparation method of bi-component capsule wave-absorbing layer structure - Google Patents
Preparation method of bi-component capsule wave-absorbing layer structure Download PDFInfo
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- CN116855121A CN116855121A CN202310865322.1A CN202310865322A CN116855121A CN 116855121 A CN116855121 A CN 116855121A CN 202310865322 A CN202310865322 A CN 202310865322A CN 116855121 A CN116855121 A CN 116855121A
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- 239000002775 capsule Substances 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 239000006229 carbon black Substances 0.000 claims abstract description 36
- 239000000203 mixture Substances 0.000 claims abstract description 36
- 239000000945 filler Substances 0.000 claims abstract description 22
- 230000002745 absorbent Effects 0.000 claims abstract description 21
- 239000002250 absorbent Substances 0.000 claims abstract description 21
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 150000001412 amines Chemical class 0.000 claims abstract description 11
- 239000003822 epoxy resin Substances 0.000 claims abstract description 11
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 11
- 239000002994 raw material Substances 0.000 claims abstract description 6
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 20
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 20
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 18
- 239000002122 magnetic nanoparticle Substances 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 15
- -1 tetraethoxysilane modified ferroferric oxide Chemical class 0.000 claims description 15
- 238000005303 weighing Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 10
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 229920002125 Sokalan® Polymers 0.000 claims description 10
- 239000004964 aerogel Substances 0.000 claims description 10
- 239000004917 carbon fiber Substances 0.000 claims description 10
- 239000004584 polyacrylic acid Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 239000002904 solvent Substances 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000011049 filling Methods 0.000 claims description 5
- 239000006249 magnetic particle Substances 0.000 claims description 4
- 238000001308 synthesis method Methods 0.000 claims description 3
- 239000011358 absorbing material Substances 0.000 abstract description 4
- 230000032683 aging Effects 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 39
- 238000000576 coating method Methods 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 239000002131 composite material Substances 0.000 description 3
- 230000005291 magnetic effect Effects 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002105 nanoparticle Substances 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Manufacturing Of Micro-Capsules (AREA)
Abstract
The invention provides a preparation method of a bi-component capsule wave-absorbing layer structure, and relates to the technical field of wave-absorbing materials. The preparation method of the bi-component capsule wave-absorbing layer structure comprises a wave-absorbing layer, wherein the wave-absorbing layer is prepared from the following raw materials in parts by weight: 30-90 parts of epoxy resin, 18-55 parts of fatty amine curing agent, 100-300 parts of absorbent filler and 2-3 parts of carbon black mixture. When the part of the wave-absorbing outer layer structural member is damaged by impact, the two inner wave-absorbing capsules are broken by impact, the components in the two wave-absorbing capsules are quickly mixed, the curing and repairing time is quick, the curing and self-repairing capability is strong, the damage and aging of the wave-absorbing outer layer structural member can be reduced to a certain extent after repairing, and the wave-absorbing performance of the wave-absorbing outer layer structural member is not reduced.
Description
Technical Field
The invention relates to the technical field of wave-absorbing materials, in particular to a preparation method of a bi-component capsule wave-absorbing layer structure.
Background
The wave-absorbing coating is a multifunctional composite material with novel structure, which is formed by taking electromagnetic medium as a matrix and chemically modifying the dielectric layer or doping various wave-absorbing materials into the matrix. The traditional wave-absorbing coating mainly comprises resin, a curing agent and a filler, and is generally liquid; the biggest difference between capsule structured coatings and traditional coatings is their self-repairing ability. In capsule structured coatings, when the surface of the coating is damaged, the capsules break to release the internal material for self-repair. The capsule structure coating has the advantages that: 1. the self-repairing capability is achieved, and damage and aging of the coating can be reduced to a certain extent; 2. the wear-resistant and corrosion-resistant alloy has good wear resistance and corrosion resistance, and can be used in severe environments; 3. the maintenance and repair cost can be reduced, and the service life of the coating can be prolonged.
At present, domestic research and application of capsule coatings are mainly focused on structural materials, and the coatings mainly repair composite materials, but do not consider repair of wave-absorbing composite materials. Therefore, how to effectively improve the wave absorbing effect and solve the problems of poor fluidity, poor weather resistance and the like of the capsule wave absorbing coating become the direction of the wave absorbing material to be explored in the future in China.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a preparation method of a bi-component capsule wave-absorbing layer structure, which solves the problems of poor fluidity and weather resistance of the existing capsule wave-absorbing coating.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: the preparation method of the bi-component capsule wave-absorbing layer structure comprises a wave-absorbing layer, wherein the wave-absorbing layer is prepared from the following raw materials in parts by weight: 30-90 parts of epoxy resin, 18-55 parts of fatty amine curing agent, 100-300 parts of absorbent filler and 2-3 parts of carbon black mixture;
the preparation method of the bi-component capsule wave-absorbing layer structure comprises the following specific steps:
s1, weighing epoxy resin, adding absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component A mixture;
s2, weighing a carbon black mixture, and placing the carbon black mixture in a grinder to grind to 100 meshes;
s3, weighing the fatty amine curing agent, the carbon black mixture and the residual absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component B mixture;
s4, injecting A, B components into the capsule shell to form A, B wave-absorbing capsules;
s5, placing A, B wave-absorbing capsules in the wave-absorbing outer layer structural member at intervals, and filling light auxiliary materials in gaps to prepare the wave-absorbing layer structure, wherein the light auxiliary materials comprise aerogel and tetraethoxysilane modified ferroferric oxide magnetic nano particles.
Preferably, the absorbent filler is carbonyl iron powder and a solvent, the solvent comprises dimethylbenzene, n-butanol and acetone, and the mass ratio of the dimethylbenzene, the n-butanol and the acetone is 2:1:1.
Preferably, the carbon black mixture consists of carbon fibers and carbon black, and the mass ratio of the carbon fibers to the carbon black is 2:1.
Preferably, the capsule shell is made of polyvinyl alcohol and polyacrylic acid in a mixing mode, and the mass ratio of the polyvinyl alcohol to the polyacrylic acid is 2:1.
Preferably, the tetraethoxysilane modified ferroferric oxide magnetic nano particles account for 5-8% of the weight of the light auxiliary materials.
Preferably, the tetraethoxysilane modified ferroferric oxide magnetic nanoparticle is a ferroferric oxide magnetic particle prepared by a Lassart synthesis method.
Preferably, the particle size of the ferroferric oxide magnetic particles is 4.5-6 μm.
(III) beneficial effects
The invention provides a preparation method of a bi-component capsule wave-absorbing layer structure. The beneficial effects are as follows:
1. according to the invention, when the part of the wave-absorbing outer layer structural member is damaged by impact, the two inner wave-absorbing capsules are broken by impact, and the components in the two wave-absorbing capsules are quickly mixed, so that the wave-absorbing outer layer structural member has the advantages of quick curing, repairing and aging, strong curing self-repairing capability, capability of reducing the damage and aging of the wave-absorbing outer layer structural member to a certain extent after repairing, and no reduction in the wave-absorbing performance of the wave-absorbing outer layer structural member.
2. According to the invention, the light auxiliary materials are injected into the gaps of the capsules in the wave-absorbing outer layer structural member, the ferroferric oxide nano particles are embedded in the aerogel, so that the aerogel is ferromagnetic, and then the aerogel with a magnetic field can be compressed and extruded by itself, so that extrusion and blockage of a damaged opening after damage are realized, meanwhile, the ferroferric oxide nano particles are added into the aerogel for dispersion and reinforcement, so that the wave-absorbing performance reinforcing function of the wave-absorbing outer layer structure of the surface layer is realized, and meanwhile, the high specific surface area and low surface energy characteristics of the wave-absorbing outer layer structural member can be improved, the adhesive force and adhesive force of the wave-absorbing outer layer structural member with the capsules are improved, the strong support of the outer layer wave-absorbing structural member is ensured, and a certain magnetic network is provided, so that the wave-absorbing performance is improved.
3. According to the invention, the ferroferric oxide magnetic particles prepared by the Lassart synthesis method are in various forms from spherical to cubic, and have higher surface activity and magnetic property after being modified by tetraethoxysilane, so that the adsorption between aerogel and particles is further enhanced, and the overall structural strength and the wave-absorbing strength reinforcing property of the wave-absorbing outer structural member are improved.
Drawings
FIG. 1 is a diagram of a performance test chart according to an embodiment;
FIG. 2 is a diagram of a second embodiment of a performance test;
FIG. 3 is a diagram of a three-performance test chart according to an embodiment;
fig. 4 is a schematic diagram of the structure of a dual-component capsule wave-absorbing layer.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
as shown in fig. 1 and fig. 4, the embodiment of the invention provides a preparation method of a dual-component capsule wave-absorbing layer structure, which comprises a wave-absorbing layer, wherein the wave-absorbing layer is prepared from the following raw materials in parts by weight: 30 parts of epoxy resin, 18 parts of fatty amine curing agent, 100 parts of absorbent filler and 2 parts of carbon black mixture;
the preparation method of the bi-component capsule wave-absorbing layer structure comprises the following specific steps:
s1, weighing 30 epoxy resin, adding 30 parts of absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component A mixture;
s2, weighing 2 parts of carbon black mixture, and placing the carbon black mixture in a grinder to grind to 100 meshes;
s3, weighing 18 parts of fatty amine curing agent, 2 parts of carbon black mixture and the rest 30 parts of absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component B mixture;
s4, injecting A, B components into the capsule shell to form A, B wave-absorbing capsules;
s5, placing A, B wave-absorbing capsules in the wave-absorbing outer layer structural member at intervals, and filling light auxiliary materials in gaps to prepare the wave-absorbing layer structure, wherein the light auxiliary materials comprise aerogel and tetraethoxysilane modified ferroferric oxide magnetic nano particles.
The absorbent filler is carbonyl iron powder and a solvent, the solvent comprises dimethylbenzene, n-butanol and acetone, the mass ratio of the dimethylbenzene, the n-butanol and the acetone is 2:1:1, the carbon black mixture is composed of carbon fibers and carbon black, the mass ratio of the carbon fibers to the carbon black is 2:1, the capsule shell is prepared by mixing polyvinyl alcohol and polyacrylic acid, and the mass ratio of the polyvinyl alcohol to the polyacrylic acid is 2:1.
The tetraethoxysilane modified ferroferric oxide magnetic nano particles account for 5% of the weight of the light auxiliary material, and the particle size of the tetraethoxysilane modified ferroferric oxide magnetic nano particles is 4.5 mu m.
As can be seen from fig. 1, the frequency has good performance at 12-18GHz, thickness: 1mm, areal density: 3.2 kg/square meter, and moderate thickness surface density; the frequency is 2.6-4GHz and the performance is 8-12GHz worse.
Wherein A in fig. 4 is an A wave-absorbing capsule, and B is a B wave-absorbing capsule.
Embodiment two:
as shown in fig. 2 and fig. 4, the embodiment of the invention provides a method for preparing a dual-component capsule wave-absorbing layer structure, which comprises a wave-absorbing layer, wherein the wave-absorbing layer is prepared from the following raw materials in parts by weight: 90 parts of epoxy resin, 55 parts of fatty amine curing agent, 300 parts of absorbent filler and 3 parts of carbon black mixture;
the preparation method of the bi-component capsule wave-absorbing layer structure comprises the following specific steps:
s1, weighing 90 epoxy resin, adding 210 parts of absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component A mixture;
s2, weighing 3 parts of carbon black mixture, and placing the carbon black mixture in a grinder to grind to 100 meshes;
s3, weighing 18 parts of fatty amine curing agent, 3 parts of carbon black mixture and the rest 90 parts of absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component B mixture;
s4, injecting A, B components into the capsule shell to form A, B wave-absorbing capsules;
s5, placing A, B wave-absorbing capsules in the wave-absorbing outer layer structural member at intervals, and filling light auxiliary materials in gaps to prepare the wave-absorbing layer structure, wherein the light auxiliary materials comprise aerogel and tetraethoxysilane modified ferroferric oxide magnetic nano particles.
The absorbent filler is carbonyl iron powder and a solvent, the solvent comprises dimethylbenzene, n-butanol and acetone, the mass ratio of the dimethylbenzene, the n-butanol and the acetone is 2:1:1, the carbon black mixture is composed of carbon fibers and carbon black, the mass ratio of the carbon fibers to the carbon black is 2:1, the capsule shell is prepared by mixing polyvinyl alcohol and polyacrylic acid, and the mass ratio of the polyvinyl alcohol to the polyacrylic acid is 2:1.
The mass of the tetraethoxysilane modified ferroferric oxide magnetic nano-particles accounts for 8% of the mass of the light auxiliary material, and the particle size of the tetraethoxysilane modified ferroferric oxide magnetic nano-particles is 6 mu m.
As can be seen from fig. 2, the frequencies are 2.6-4GHz and 8-12GHz, which have good performance; the frequency is poor in 12-18GHz performance, and the thickness is as follows: 1.2mm, areal density: 4 kg/square meter, higher thickness area density deviation
Embodiment III:
as shown in fig. 3 and fig. 4, the embodiment of the invention provides a preparation method of a dual-component capsule wave-absorbing layer structure, which comprises a wave-absorbing layer, wherein the wave-absorbing layer is prepared from the following raw materials in parts by weight: 60 parts of epoxy resin, 40 parts of fatty amine curing agent, 250 parts of absorbent filler and 2.4 parts of carbon black mixture;
the preparation method of the bi-component capsule wave-absorbing layer structure comprises the following specific steps:
s1, weighing 2.4 parts of epoxy resin, adding 175 parts of absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component A mixture;
s2, weighing 2.4 parts of carbon black mixture, and placing the carbon black mixture in a grinder to grind to 100 meshes;
s3, weighing 40 parts of fatty amine curing agent, 2.4 parts of carbon black mixture and 75 parts of absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component B mixture;
s4, injecting A, B components into the capsule shell to form A, B wave-absorbing capsules;
s5, placing A, B wave-absorbing capsules in the wave-absorbing outer layer structural member at intervals, and filling light auxiliary materials in gaps to prepare the wave-absorbing layer structure, wherein the light auxiliary materials comprise aerogel and tetraethoxysilane modified ferroferric oxide magnetic nano particles.
The absorbent filler is carbonyl iron powder and a solvent, the solvent comprises dimethylbenzene, n-butanol and acetone, the mass ratio of the dimethylbenzene, the n-butanol and the acetone is 2:1:1, the carbon black mixture is composed of carbon fibers and carbon black, the mass ratio of the carbon fibers to the carbon black is 2:1, the capsule shell is prepared by mixing polyvinyl alcohol and polyacrylic acid, and the mass ratio of the polyvinyl alcohol to the polyacrylic acid is 2:1.
The mass of the tetraethoxysilane modified ferroferric oxide magnetic nano-particles accounts for 6% of the mass of the light auxiliary material, and the particle size of the tetraethoxysilane modified ferroferric oxide magnetic nano-particles is 4.98 mu m.
As can be seen from FIG. 3, the frequencies are less than or equal to-8 dB at 8-18GHz, and the low frequency (2.6-4 GHz) also has better wave absorbing performance (average value is less than or equal to 2.5 dB), and the thickness is as follows: 1mm, areal density: 3.5 kg/square meter, and moderate thickness surface density.
In summary, the third embodiment has the best wave absorbing performance, and has better reflection loss in the frequency range of 8-18 GHz.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A preparation method of a bi-component capsule wave-absorbing layer structure is characterized by comprising the following steps: the wave absorbing layer is prepared from the following raw materials in parts by weight: 30-90 parts of epoxy resin, 18-55 parts of fatty amine curing agent, 100-300 parts of absorbent filler and 2-3 parts of carbon black mixture;
the preparation method of the bi-component capsule wave-absorbing layer structure comprises the following specific steps:
s1, weighing epoxy resin, adding absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component A mixture;
s2, weighing a carbon black mixture, and placing the carbon black mixture in a grinder to grind to 100 meshes;
s3, weighing the fatty amine curing agent, the carbon black mixture and the residual absorbent filler, and uniformly stirring and mixing in a stirrer to obtain a component B mixture;
s4, injecting A, B components into the capsule shell to form A, B wave-absorbing capsules;
s5, placing A, B wave-absorbing capsules in the wave-absorbing outer layer structural member at intervals, and filling light auxiliary materials in gaps to prepare the wave-absorbing layer structure, wherein the light auxiliary materials comprise aerogel and tetraethoxysilane modified ferroferric oxide magnetic nano particles.
2. The method for preparing the dual-component capsule wave-absorbing layer structure according to claim 1, wherein the method comprises the following steps: the absorbent filler is carbonyl iron powder and a solvent, the solvent comprises dimethylbenzene, n-butanol and acetone, and the mass ratio of the dimethylbenzene to the n-butanol to the acetone is 2:1:1.
3. The method for preparing the dual-component capsule wave-absorbing layer structure according to claim 1, wherein the method comprises the following steps: the carbon black mixture consists of carbon fibers and carbon black, and the mass ratio of the carbon fibers to the carbon black is 2:1.
4. The method for preparing the dual-component capsule wave-absorbing layer structure according to claim 1, wherein the method comprises the following steps: the capsule shell is prepared by mixing polyvinyl alcohol and polyacrylic acid, and the mass ratio of the polyvinyl alcohol to the polyacrylic acid is 2:1.
5. The method for preparing the dual-component capsule wave-absorbing layer structure according to claim 1, wherein the method comprises the following steps: the tetraethoxysilane modified ferroferric oxide magnetic nano particles account for 5-8% of the weight of the light auxiliary materials.
6. The method for preparing the dual-component capsule wave-absorbing layer structure according to claim 1, wherein the method comprises the following steps: the tetraethoxysilane modified ferroferric oxide magnetic nanoparticle is prepared by a Lassart synthesis method.
7. The method for preparing the dual-component capsule wave-absorbing layer structure according to claim 6, wherein the method comprises the following steps: the particle size of the ferroferric oxide magnetic particles is 4.5-6 mu m.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211757A (en) * | 2019-05-24 | 2019-09-06 | 清华大学 | With amphipathic and magnetic nano particle and preparation method thereof |
| CN110882702A (en) * | 2019-12-16 | 2020-03-17 | 生态环境部环境规划院 | Preparation method and application of catalytic material based on magnetic layered double hydroxide |
| CN113352706A (en) * | 2021-06-15 | 2021-09-07 | 武汉中科先进技术研究院有限公司 | Basalt fiber structural wave-absorbing composite material and preparation method thereof |
| CN116023841A (en) * | 2022-11-16 | 2023-04-28 | 武汉中科先进材料科技有限公司 | Coating with rapid repair function and preparation method thereof |
-
2023
- 2023-07-14 CN CN202310865322.1A patent/CN116855121A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110211757A (en) * | 2019-05-24 | 2019-09-06 | 清华大学 | With amphipathic and magnetic nano particle and preparation method thereof |
| CN110882702A (en) * | 2019-12-16 | 2020-03-17 | 生态环境部环境规划院 | Preparation method and application of catalytic material based on magnetic layered double hydroxide |
| CN113352706A (en) * | 2021-06-15 | 2021-09-07 | 武汉中科先进技术研究院有限公司 | Basalt fiber structural wave-absorbing composite material and preparation method thereof |
| CN116023841A (en) * | 2022-11-16 | 2023-04-28 | 武汉中科先进材料科技有限公司 | Coating with rapid repair function and preparation method thereof |
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