CN111393948A - Preparation method of material with good wave-absorbing effect - Google Patents
Preparation method of material with good wave-absorbing effect Download PDFInfo
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- CN111393948A CN111393948A CN202010232452.8A CN202010232452A CN111393948A CN 111393948 A CN111393948 A CN 111393948A CN 202010232452 A CN202010232452 A CN 202010232452A CN 111393948 A CN111393948 A CN 111393948A
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- 239000000463 material Substances 0.000 title claims abstract description 116
- 230000000694 effects Effects 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000011358 absorbing material Substances 0.000 claims abstract description 31
- 229910052751 metal Inorganic materials 0.000 claims abstract description 30
- 239000002184 metal Substances 0.000 claims abstract description 30
- 239000004964 aerogel Substances 0.000 claims abstract description 28
- 239000003822 epoxy resin Substances 0.000 claims abstract description 28
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 28
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 27
- 229920005992 thermoplastic resin Polymers 0.000 claims abstract description 24
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000004005 microsphere Substances 0.000 claims abstract description 18
- 229920003023 plastic Polymers 0.000 claims abstract description 18
- 239000004033 plastic Substances 0.000 claims abstract description 18
- 239000006096 absorbing agent Substances 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims description 20
- 238000000227 grinding Methods 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 20
- 238000002156 mixing Methods 0.000 claims description 15
- 238000010009 beating Methods 0.000 claims description 14
- 238000004537 pulping Methods 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 10
- 239000006185 dispersion Substances 0.000 claims description 10
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- 239000004952 Polyamide Substances 0.000 claims description 5
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- 238000010521 absorption reaction Methods 0.000 claims description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 claims description 5
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- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical group NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 5
- 239000004843 novolac epoxy resin Substances 0.000 claims description 5
- 229920002492 poly(sulfone) Polymers 0.000 claims description 5
- 229920002647 polyamide Polymers 0.000 claims description 5
- 229920000515 polycarbonate Polymers 0.000 claims description 5
- 239000004417 polycarbonate Substances 0.000 claims description 5
- 229920000573 polyethylene Polymers 0.000 claims description 5
- 229920006324 polyoxymethylene Polymers 0.000 claims description 5
- 229920002223 polystyrene Polymers 0.000 claims description 5
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- 239000004576 sand Substances 0.000 claims description 5
- 238000010008 shearing Methods 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 229920013636 polyphenyl ether polymer Polymers 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 18
- 239000002131 composite material Substances 0.000 abstract description 10
- 229910052742 iron Inorganic materials 0.000 abstract description 9
- 239000000969 carrier Substances 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000006386 neutralization reaction Methods 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
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- 229920001187 thermosetting polymer Polymers 0.000 abstract description 4
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- 229930040373 Paraformaldehyde Natural products 0.000 description 4
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- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 230000002195 synergetic effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000004967 Metal oxide aerogel Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229910000314 transition metal oxide Inorganic materials 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
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- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
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- 238000003745 diagnosis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007709 nanocrystallization Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 239000002245 particle Substances 0.000 description 1
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- 230000008569 process Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
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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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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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
- C09D5/24—Electrically-conducting paints
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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
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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
- C09D5/38—Paints containing free metal not provided for above in groups C09D5/00 - C09D5/36
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- 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
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- 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
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/18—Spheres
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a preparation method of a material with a good wave-absorbing effect, which comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of curing agent, 5-15 parts of accelerator, 50-150 parts of wave absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water. Through neutralization preparation, aerogel materials are used as carriers, magnetic metal powder such as iron materials are deposited inside the aerogel, thermoplastic resin is added inwards, the insulating property of the thermoplastic resin is utilized to prepare the thermoplastic wave-absorbing material, the composite wave-absorbing material substrate with high resistivity is prepared, the thermosetting property of epoxy resin and plastic microspheres is utilized, the curing reaction of the epoxy resin is enhanced by adding a curing agent and an accelerating agent inwards, the integral wave-absorbing performance and the heat resistance of the wave-absorbing material are improved, the density of the composite material is reduced, the antistatic effect is improved, the light weight of the material is achieved, and the utilization rate of the material is improved.
Description
Technical Field
The invention relates to a production process of a wave-absorbing material, in particular to a preparation method of a material with a good wave-absorbing effect.
Background
With the development of modern science and technology, the influence of electromagnetic wave radiation on the environment is increasing day by day. In airport and airplane flight, the normal work of various electronic diagnosis and treatment instruments is often interfered by electromagnetic wave interference,% in hospitals and mobile phones, and electromagnetic radiation causes direct and indirect damage to human bodies through thermal effect, non-thermal effect and accumulation effect. The material can be applied to electronic equipment to absorb leaked electromagnetic radiation and achieve the aim of eliminating electromagnetic interference. According to the propagation rule of electromagnetic waves from low magnetic conduction to high magnetic conduction directions in a medium, the ferrite with high magnetic conductivity is used for guiding the electromagnetic waves, a large amount of radiation energy of the electromagnetic waves is absorbed through resonance, and then the energy of the electromagnetic waves is converted into heat energy through coupling, so that the treatment of electromagnetic pollution is a research target which needs to be paid great attention.
In the prior art, rubber such as polysulfide rubber, hydroxyl-terminated butyl ester rubber and the like is adopted to modify epoxy resin, but the method can greatly lose the mechanical property and the high-temperature property of the resin; although the organic silicon resin modification can improve the dielectric property, the toughness and the high temperature resistance and reduce the internal stress, the compatibility of the organic silicon resin and the epoxy resin is poor; the method of adding rigid particles into epoxy resin is adopted to reduce the material cost, control the thermal expansion and contraction of the material and improve the tensile elastic modulus of the material, but the internal stress of an epoxy resin composite system can be increased, the base materials of the existing wave-absorbing material comprise FR-4 materials, ceramic materials, ferroelectric materials, ferrite materials and the like, some patent documents disclose that transition metal base aerogel, transition metal oxide aerogel, composite transition metal oxide aerogel and the like are used as the wave-absorbing material, and the iron-based material is typically realized by using the iron oxide aerogel. The FR-4 material is heavy in mass and cannot meet the requirement of light weight in many environments, the ferroferric oxide aerogel is poor in wave absorbing effect if being directly used as a wave absorbing material, and if the ferroferric oxide aerogel is directly reduced into nano iron, a network can collapse along with the loss of oxygen in the reduction process, nano holes disappear, and the rest iron is easy to agglomerate due to the action of a magnetic field of the iron, so that the nanocrystallization of the iron and the light weight of the whole wave absorbing material cannot be realized.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a preparation method of a material with good wave-absorbing effect, through neutralization preparation, aerogel materials are taken as carriers, magnetic metal powder such as iron materials are deposited inside the aerogel, thermoplastic resin is added, the insulating property of the thermoplastic resin is utilized to prepare the thermoplastic wave-absorbing material, the composite wave-absorbing material substrate with high resistivity is prepared, and the thermosetting property of epoxy resin and plastic microspheres is utilized, the curing reaction of the epoxy resin is enhanced by adding the curing agent and the accelerator into the microwave absorbing material, and the added plastic microspheres have foamability, so that the overall microwave absorbing performance and heat resistance of the microwave absorbing material are improved, meanwhile, the density of the composite material is reduced, the antistatic effect is improved, the light weight of the material is achieved, and the utilization rate of the material is improved.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of a material with a good wave-absorbing effect comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of curing agent, 5-15 parts of accelerator, 50-150 parts of wave absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water, and the method comprises the following steps:
s1, weighing materials: 70 parts of water, 20 parts of plastic microspheres, 60 parts of aerogel, 20 parts of thermoplastic resin and 40 parts of magnetic metal powder;
s2, pulping and dispersing: pouring the raw materials into a dispersion beater to carry out beating dispersion treatment, and beating different types of classified pulp;
s3, conveying materials: transferring the materials subjected to pulping and dispersing treatment to the interior of a grinding machine;
s4, grinding materials: starting the grinder, operating the grinder to carry out high-efficiency grinding treatment on the materials in the grinder, and eliminating air in the raw materials under the action of shearing force;
s5, mixing materials: 8 parts of curing agent, 10 parts of accelerator and 100 parts of wave absorbing agent are injected into the ground material;
s6, mixing materials: pouring the paint-mixed materials into stirring equipment for stirring treatment, so that the materials are uniformly mixed;
s7, filtering the materials: and filtering the mixed material by using a filtering device to remove metal scraps, impurities and the like which are not ground and ground.
Preferably, the beating and dispersing time is 10-15 minutes, the material grinding time is 10-20 minutes, and the material mixing time is 20-40 minutes.
Preferably, the aerogel is a silica aerogel.
Preferably, a metal microstructure for cooperative wave absorption is formed on the surface of the wave absorbing material.
Preferably, the thermoplastic resin is polyethylene, polyvinyl chloride, polystyrene, polyamide, polyoxymethylene, polycarbonate, polyphenylene oxide, polysulfone or rubber.
Preferably, the grinder is a sand grinder, and the filtering equipment is a plate and frame filter.
Preferably, the wave-absorbing material also comprises fibers, and the volume percentage of the fibers is not higher than 30%.
Preferably, the epoxy resin is composed of a bisphenol epoxy resin or a novolac epoxy resin.
Preferably, the curing agent is a dicyandiamide curing agent.
Preferably, the accelerator is aromatic urea, and the wave absorber is made of carbon black or metal powder.
The invention has the technical effects and advantages that:
according to the invention, through neutralization preparation, aerogel materials are taken as carriers, magnetic metal powder such as iron materials are deposited inside aerogel, thermoplastic resin is added inwards, the insulating property of the thermoplastic resin is utilized to prepare the thermoplastic wave-absorbing material, the composite wave-absorbing material substrate with high resistivity is prepared, the thermosetting property of epoxy resin and plastic microspheres is utilized, the curing reaction of the epoxy resin is enhanced by adding curing agent and accelerant inwards, and the added plastic microspheres have foamability, so that the integral wave-absorbing performance and heat resistance of the wave-absorbing material are improved, the density of the composite material is reduced, the antistatic effect is improved, the material is lightened, and the utilization rate of the material is improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation method of a material with a good wave-absorbing effect comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of curing agent, 5-15 parts of accelerator, 50-150 parts of wave absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water, and the method comprises the following steps:
s1, weighing materials: 70 parts of water, 20 parts of plastic microspheres, 60 parts of aerogel, 20 parts of thermoplastic resin and 40 parts of magnetic metal powder;
s2, pulping and dispersing: pouring the raw materials into a dispersion beater to carry out beating dispersion treatment, and beating different types of classified pulp;
s3, conveying materials: transferring the materials subjected to pulping and dispersing treatment to the interior of a grinding machine;
s4, grinding materials: starting the grinder, operating the grinder to carry out high-efficiency grinding treatment on the materials in the grinder, and eliminating air in the raw materials under the action of shearing force;
s5, mixing materials: 8 parts of curing agent, 10 parts of accelerator and 100 parts of wave absorbing agent are injected into the ground material;
s6, mixing materials: pouring the paint-mixed materials into stirring equipment for stirring treatment, so that the materials are uniformly mixed;
s7, filtering the materials: and filtering the mixed material by using a filtering device to remove metal scraps, impurities and the like which are not ground and ground.
Preferably, the beating and dispersing time is 12 minutes, the material grinding time is 15 minutes, and the material mixing time is 30 minutes.
Preferably, the aerogel is a silica aerogel.
Preferably, a metal microstructure for synergistic wave absorption is formed on the surface of the wave-absorbing material.
Preferably, the thermoplastic resin is polyethylene, polyvinyl chloride, polystyrene, polyamide, polyoxymethylene, polycarbonate, polyphenylene oxide, polysulfone or rubber.
Preferably, the grinder is a sand grinder, and the filtering equipment is a plate and frame filter.
Preferably, the wave-absorbing material also comprises fibers, and the volume percentage of the fibers is not higher than 30%.
Preferably, the epoxy resin is composed of a bisphenol epoxy resin or a novolac epoxy resin.
Preferably, the curing agent is a dicyandiamide curing agent.
Preferably, the accelerator is an aromatic urea and the wave absorber is composed of carbon black or metal powder.
The wave-absorbing material obtained by the method is smeared outside the equipment plate, and the smeared equipment plate is tested by the same electromagnetic wave strength in the same time, so that the wave-absorbing property can be continuously achieved: 22dB, thereby achieving excellent wave absorbing effect.
Example 2
A preparation method of a material with a good wave-absorbing effect comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of curing agent, 5-15 parts of accelerator, 50-150 parts of wave absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water, and the method comprises the following steps:
s1, weighing materials: 60 parts of water, 10 parts of plastic microspheres, 50 parts of aerogel, 10 parts of thermoplastic resin and 30 parts of magnetic metal powder;
s2, pulping and dispersing: pouring the raw materials into a dispersion beater to carry out beating dispersion treatment, and beating different types of classified pulp;
s3, conveying materials: transferring the materials subjected to pulping and dispersing treatment to the interior of a grinding machine;
s4, grinding materials: starting the grinder, operating the grinder to carry out high-efficiency grinding treatment on the materials in the grinder, and eliminating air in the raw materials under the action of shearing force;
s5, mixing materials: 4 parts of curing agent, 5 parts of accelerant and 50 parts of wave absorbing agent are injected into the ground material;
s6, mixing materials: pouring the paint-mixed materials into stirring equipment for stirring treatment, so that the materials are uniformly mixed;
s7, filtering the materials: and filtering the mixed material by using a filtering device to remove metal scraps, impurities and the like which are not ground and ground.
Preferably, the beating and dispersing time is 10 minutes, the material grinding time is 10 minutes, and the material mixing time is 20 minutes.
Preferably, the aerogel is a silica aerogel.
Preferably, a metal microstructure for synergistic wave absorption is formed on the surface of the wave-absorbing material.
Preferably, the thermoplastic resin is polyethylene, polyvinyl chloride, polystyrene, polyamide, polyoxymethylene, polycarbonate, polyphenylene oxide, polysulfone or rubber.
Preferably, the grinder is a sand grinder, and the filtering equipment is a plate and frame filter.
Preferably, the wave-absorbing material also comprises fibers, and the volume percentage of the fibers is not higher than 30%.
Preferably, the epoxy resin is composed of a bisphenol epoxy resin or a novolac epoxy resin.
Preferably, the curing agent is a dicyandiamide curing agent.
Preferably, the accelerator is an aromatic urea and the wave absorber is composed of carbon black or metal powder.
The wave-absorbing material obtained by the method is smeared outside the equipment plate, and the smeared equipment plate is tested by the same electromagnetic wave strength in the same time, so that the wave-absorbing property can be continuously achieved: 19dB, and achieves excellent wave absorbing effect.
Example 3
A preparation method of a material with a good wave-absorbing effect comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of curing agent, 5-15 parts of accelerator, 50-150 parts of wave absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water, and the method comprises the following steps:
s1, weighing materials: 80 parts of water, 30 parts of plastic microspheres, 70 parts of aerogel, 30 parts of thermoplastic resin and 50 parts of magnetic metal powder;
s2, pulping and dispersing: pouring the raw materials into a dispersion beater to carry out beating dispersion treatment, and beating different types of classified pulp;
s3, conveying materials: transferring the materials subjected to pulping and dispersing treatment to the interior of a grinding machine;
s4, grinding materials: starting the grinder, operating the grinder to carry out high-efficiency grinding treatment on the materials in the grinder, and eliminating air in the raw materials under the action of shearing force;
s5, mixing materials: injecting 10 parts of curing agent, 15 parts of accelerator and 150 parts of wave absorbing agent into the ground material;
s6, mixing materials: pouring the paint-mixed materials into stirring equipment for stirring treatment, so that the materials are uniformly mixed;
s7, filtering the materials: and filtering the mixed material by using a filtering device to remove metal scraps, impurities and the like which are not ground and ground.
Preferably, the beating and dispersing time is 15 minutes, the material grinding time is 20 minutes, and the material mixing time is 40 minutes.
Preferably, the aerogel is a silica aerogel.
Preferably, a metal microstructure for synergistic wave absorption is formed on the surface of the wave-absorbing material.
Preferably, the thermoplastic resin is polyethylene, polyvinyl chloride, polystyrene, polyamide, polyoxymethylene, polycarbonate, polyphenylene oxide, polysulfone or rubber.
Preferably, the grinder is a sand grinder, and the filtering equipment is a plate and frame filter.
Preferably, the wave-absorbing material also comprises fibers, and the volume percentage of the fibers is not higher than 30%.
Preferably, the epoxy resin is composed of a bisphenol epoxy resin or a novolac epoxy resin.
Preferably, the curing agent is dicyandiamide curing agent, and the wave absorbing agent is composed of carbon black or metal powder.
The wave-absorbing material obtained by the method is smeared outside the equipment plate, and the smeared equipment plate is tested by the same electromagnetic wave strength in the same time, so that the wave-absorbing property can be continuously achieved: and (8) 26dB, so that an excellent wave absorbing effect is achieved.
In summary, the following steps: compared with other treatment processes, the preparation method of the material with good wave-absorbing effect provided by the invention has the following advantages: through neutralization preparation, aerogel materials are used as carriers, magnetic metal powder such as iron materials are deposited inside the aerogel, thermoplastic resin is added inwards, the insulating property of the thermoplastic resin is utilized to prepare the thermoplastic wave-absorbing material, the composite wave-absorbing material substrate with high resistivity is prepared, the thermosetting property of epoxy resin and plastic microspheres is utilized, the curing reaction of the epoxy resin is enhanced by adding a curing agent and an accelerating agent inwards, the added plastic microspheres have foamability, the integral wave-absorbing performance and heat resistance of the wave-absorbing material are improved, the density of the composite material is reduced, the antistatic effect is improved, the light weight of the material is achieved, and the utilization rate of the material is improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. A preparation method of a material with good wave-absorbing effect is characterized by comprising the following steps: comprises the following raw materials in parts by weight: 90-110 parts of epoxy resin, 10-30 parts of plastic microspheres, 4-10 parts of curing agent, 5-15 parts of accelerator, 50-150 parts of wave absorbing agent, 50-70 parts of aerogel, 10-30 parts of thermoplastic resin, 30-50 parts of magnetic metal powder and 60-80 parts of water, and the method comprises the following steps:
s1, weighing materials: 70 parts of water, 20 parts of plastic microspheres, 60 parts of aerogel, 20 parts of thermoplastic resin and 40 parts of magnetic metal powder;
s2, pulping and dispersing: pouring the raw materials into a dispersion beater to carry out beating dispersion treatment, and beating different types of classified pulp;
s3, conveying materials: transferring the materials subjected to pulping and dispersing treatment to the interior of a grinding machine;
s4, grinding materials: starting the grinder, operating the grinder to carry out high-efficiency grinding treatment on the materials in the grinder, and eliminating air in the raw materials under the action of shearing force;
s5, mixing materials: 8 parts of curing agent, 10 parts of accelerator and 100 parts of wave absorbing agent are injected into the ground material;
s6, mixing materials: pouring the paint-mixed materials into stirring equipment for stirring treatment, so that the materials are uniformly mixed;
s7, filtering the materials: and filtering the mixed material by using a filtering device to remove metal scraps, impurities and the like which are not ground and ground.
2. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the pulping and dispersing time is 10-15 minutes, the material grinding time is 10-20 minutes, and the material mixing time is 20-40 minutes.
3. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the aerogel is a silica aerogel.
4. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: and a metal microstructure for cooperative wave absorption is formed on the surface of the wave absorbing material.
5. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the thermoplastic resin is polyethylene, polyvinyl chloride, polystyrene, polyamide, polyformaldehyde, polycarbonate, polyphenyl ether, polysulfone or rubber.
6. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the grinder is a sand grinder, and the filtering equipment is a plate and frame filter.
7. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the wave-absorbing material also comprises fibers, and the volume percentage of the fibers is not higher than 30%.
8. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the epoxy resin is composed of bisphenol epoxy resin or novolac epoxy resin.
9. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the curing agent is dicyandiamide curing agent.
10. The method for preparing the material with good wave-absorbing effect according to claim 1, which is characterized in that: the accelerator is aromatic urea, and the wave absorbing agent is composed of carbon black or metal powder.
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| CN112011180A (en) * | 2020-08-28 | 2020-12-01 | 武汉市莎卡娜尔科技有限公司 | Wave-absorbing radiation-proof plastic and preparation method thereof |
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