CN109096773A - The preparation method and application of electromagnetic shielding material, cellular board and cellular board - Google Patents
The preparation method and application of electromagnetic shielding material, cellular board and cellular board Download PDFInfo
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- CN109096773A CN109096773A CN201810898232.1A CN201810898232A CN109096773A CN 109096773 A CN109096773 A CN 109096773A CN 201810898232 A CN201810898232 A CN 201810898232A CN 109096773 A CN109096773 A CN 109096773A
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- cellular board
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- 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
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
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- 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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- Nanotechnology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention provides a kind of electromagnetic shielding material, the preparation method and application of cellular board and cellular board.The mass fraction of raw material contained by electromagnetic shielding material provided by the invention and each raw material are as follows: silicone rubber matrix: 100 parts；Carbon nanotube: 5~30 parts；Silane coupling agent: 1~5 part；Dispersing agent: 5~20 parts；Vulcanizing agent: 1~10 part.For electromagnetic shielding material provided by the invention with the raising of wave frequency, effectiveness is more preferable.
Description
Technical field
The present invention relates to electromangnetic spectrum field more particularly to a kind of electromagnetic shielding materials, cellular board and cellular board
Preparation method and application.
Background technique
In the related fieldss such as network communication apparatus, Medical Devices, aerospace, intelligent driving, Internet of Things, setting ventilation
Plate effectively shields electromagnetic wave, prevents electromagnetic wave leakage while meeting equipment ventilation and heat.
In the prior art, using the ventilating board of honeycomb, air can be allowed to enter while stopping electromagnetic wave.Ventilating board
It is formed by numerous bee nests, the performance for shielding electromagnetic wave is good.
But the material of the ventilating board of existing honeycomb is usually the metallic conductors such as aluminium alloy, when on wave frequency
It rises, electromagnetic wave cutoff wavelength is smaller and smaller, and cellular board gap cannot infinitely become smaller (heat dissipation needs).Therefore, high-frequency is coped with
When (10GHz or more) electromagnetic wave, the performance of the ventilation version shielding electromagnetic wave of existing aluminum alloy material is poor.
Summary of the invention
The present invention provides a kind of electromagnetic shielding material, the preparation method and application of cellular board and cellular board, solves existing
The ventilating board of honeycomb shields the poor problem of the performance of electromagnetic wave when coping with high-frequency electromagnetic wave.
The present invention provides a kind of electromagnetic shielding material, the mass fraction of raw material contained by electromagnetic shielding material and each raw material are as follows:
Silicone rubber matrix: 100 parts；Carbon nanotube: 5~30 parts；Silane coupling agent: 1~5 part；Dispersing agent: 1~20 part；Sulphur
Agent: 1~10 part.
As a kind of optional mode, electromagnetic shielding material provided by the invention, silicone rubber matrix is methyl ethylene silicon
At least one of rubber, methyl phenyl vinyl silicone rubber or fluorine silicone rubber.
As a kind of optional mode, electromagnetic shielding material provided by the invention, the diameter of carbon nanotube is 2~40nm.
As a kind of optional mode, electromagnetic shielding material provided by the invention, the length of carbon nanotube is 1~400 μm.
The present invention also provides a kind of cellular boards, are made of above-mentioned electromagnetic shielding material.
The present invention also provides a kind of preparation methods of above-mentioned cellular board, include the following steps,
Step 1 mixes after weighing the raw material of electromagnetic shielding material according to mass parts ratio, and mixture is made；
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made；
Film is put into vulcanizing press and is molded by step 3, and cellular board blank is made；
Cellular board blank is heat-treated by step 4, obtains cellular board.
As a kind of optional mode, the preparation method of cellular board provided by the invention, film placement is less than or equal to
Vulcanizing press is put into afterwards for 24 hours to be molded；
Rubber mixing machine is two rollers or three roller rubber mixing machines.
As a kind of optional mode, the preparation method of cellular board provided by the invention, curing temperature is 100 in step 3
~300 DEG C, vulcanization time is 1~10min；
Heat treatment temperature is 120~300 DEG C in step 4, and heat treatment time is 60~600min.
The present invention also provides a kind of above-mentioned electromagnetic shielding materials in network communication apparatus, Medical Devices, aerospace, intelligence
It can drive, the application in internet of things field.
Electromagnetic shielding material provided by the invention, the preparation method and application of cellular board and cellular board, electromagnetic shielding material
It is provided simultaneously with electromagnetic shielding effectiveness and electro-magnetic wave absorption effect, when frequency electromagnetic waves excite carbon nanotube polarization, energy is inhaled
It receives and decays, and the electric conductivity of carbon nanotube improves, and electromagnetic shielding capability is promoted to increase.Add this high knot of carbon nanotube
Structure, high activity the electromagnetic shielding material of non-metal kind electrical-conductive nanometer material there is electromagnetic wave absorption simultaneously and shield electromagnetic wave
Effect, and the increase of wave frequency are positively correlated with its polarization effect, and the cellular board prepared with the electromagnetic shielding material is to height
The shield effectiveness of frequency electromagnetic waves is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to make simply to introduce, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the flow chart of the preparation method of cellular board provided in an embodiment of the present invention；
Fig. 2 is the cellular board the performance test results figure of first embodiment of the invention preparation；
Fig. 3 is the cellular board the performance test results figure of second embodiment of the invention preparation；
Fig. 4 is the cellular board the performance test results figure of third embodiment of the invention preparation.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described,
Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the scope of protection of the invention.
The present embodiment provides a kind of electromagnetic shielding material, the mass fraction of raw material contained by electromagnetic shielding material and each raw material
Are as follows:
Silicone rubber matrix: 100 parts；Carbon nanotube: 5~30 parts；Silane coupling agent: 1~5 part；Dispersing agent: 1~20 part；Sulphur
Agent: 1~10 part.
Optionally, electromagnetic shielding material provided in this embodiment, silicone rubber matrix are methyl vinyl silicone rubber, methylbenzene
At least one of base vinylsiloxane rubber or fluorine silicone rubber.
Optionally, electromagnetic shielding material provided in this embodiment, carbon nanotube (Carbon Nanotube, abridge CNT) tool
There are special electromagnetic property, excellent mechanical property and stable physico-chemical property.Its low-density, it is good with silica gel substrate compatibility,
The characteristic of bandwidth.
1, the good electric conductivity of carbon nanotube ensure that material to the very strong screening ability of electromagnetic wave.
2, the higher complex dielectric permittivity real part of carbon nanotube improves the ability of material storage electromagnetic wave energy, modified doping
The CNT spin density of states is improved afterwards promotes the ability of material loss electromagnetic wave to improve complex dielectric permittivity imaginary part.It integrates
Come, the wave-absorbing effect of high band is more obvious.
Optionally, electromagnetic shielding material provided in this embodiment, the diameter of carbon nanotube are 2~40nm, length is 1~
400μm。
Optionally, electromagnetic shielding material provided in this embodiment, silane coupling agent are that silane coupling agent is three second of vinyl
Oxysilane, vinyltrimethoxysilane, vinyl tris silane, γ mercaptopropyitrimethoxy silane, γ-aminopropyl three
At least one of Ethoxysilane or n-octytriethoxysilane.
Optionally, electromagnetic shielding material provided in this embodiment, vulcanizing agent are di-t-butyl peroxide, peroxidating diisopropyl
At least one of benzene, 2,5- dimethyl -2,5- bis(t-butylperoxy) hexane or Pt catalyst.
Optionally, electromagnetic shielding material provided in this embodiment, dispersing agent are fatty acid, metal fatty acid salt, fatty acid
The metal of ester, the condensation product of higher fatty acids or higher fatty acids is at least one of saponified.
Table one is the minimum electromagnet shield effect under electromagnetic shielding material difference wave frequency provided in this embodiment, from
Data can be seen that the raising with wave frequency in table one, and effectiveness is more preferable.
Table one
The present embodiment additionally provides a kind of cellular board, is made of above-mentioned electromagnetic shielding material.
Fig. 1 is the flow chart of the preparation method of cellular board provided in an embodiment of the present invention.As shown in Figure 1, the present embodiment mentions
The preparation method of the cellular board of confession, includes the following steps,
Step 1 mixes after weighing the raw material of electromagnetic shielding material according to mass parts ratio, and mixture is made；
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made；
Film is put into vulcanizing press and is molded by step 3, and cellular board blank is made；
Cellular board blank is heat-treated by step 4, obtains cellular board.
As a kind of optional mode, the preparation method of cellular board provided in this embodiment, film placement is less than or waits
It is molded in being put into vulcanizing press afterwards for 24 hours.
As a kind of optional mode, the preparation method of cellular board provided in this embodiment, rubber mixing machine is two rollers or three rollers
Rubber mixing machine.
As a kind of optional mode, the preparation method of cellular board provided in this embodiment, curing temperature is in step 3
100~300 DEG C, vulcanization time is 1~10min.
As a kind of optional mode, the preparation method of cellular board provided in this embodiment, heat treatment temperature is in step 4
120~300 DEG C, heat treatment time is 60~600min.
The preparation method first embodiment of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made.
Film is put into vulcanizing press and is molded by step 3, and cellular board blank is made, and wherein curing temperature is 160
DEG C, vulcanization time 5min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 180 DEG C, heat treatment
Time is 240min.
Fig. 2 is the cellular board the performance test results figure of first embodiment of the invention preparation.Bee prepared by first embodiment
Nest plate is tested for the property, and test results are shown in figure 2, it can thus be seen that with the raising of wave frequency, electromagnetic shielding
Effect is more preferable.
The preparation method second embodiment of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is three roller rubber mixing machines.
Step 3 is molded after film to be placed to 2h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 130 DEG C, vulcanization time 9min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 150 DEG C, heat treatment
Time is 500min.
Fig. 3 is the cellular board the performance test results figure of second embodiment of the invention preparation.Bee prepared by second embodiment
Nest plate is tested for the property, and test results are shown in figure 3, it can thus be seen that with the raising of wave frequency, electromagnetic shielding
Effect is more preferable.
The preparation method 3rd embodiment of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is three roller rubber mixing machines.
Step 3 is molded after film to be placed to 4h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 200 DEG C, vulcanization time 3min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 200 DEG C, heat treatment
Time is 400min.
Fig. 4 is the cellular board the performance test results figure of third embodiment of the invention preparation.Bee prepared by 3rd embodiment
Nest plate is tested for the property, and test results are shown in figure 4, it can thus be seen that with the raising of wave frequency, electromagnetic shielding
Effect is more preferable.
The preparation method fourth embodiment of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is three roller rubber mixing machines.
Step 3 is molded after film to be placed to 6h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 170 DEG C, vulcanization time 7min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 180 DEG C, heat treatment
Time is 300min.
The 5th embodiment of preparation method of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is three roller rubber mixing machines.
Step 3 is molded after film to be placed to 8h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 180 DEG C, vulcanization time 6min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 200 DEG C, heat treatment
Time is 200min.
The preparation method sixth embodiment of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is two roller rubber mixing machines.
Step 3 is molded after film to be placed to 10h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 180 DEG C, vulcanization time 5min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 210 DEG C, heat treatment
Time is 100min.
The 7th embodiment of preparation method of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is two roller rubber mixing machines.
Step 3 is molded after film to be placed to 12h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 175 DEG C, vulcanization time 4min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 240 DEG C, heat treatment
Time is 60min.
The 8th embodiment of preparation method of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is two roller rubber mixing machines.
Step 3 is molded after film to be placed to 14h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 175 DEG C, vulcanization time 3min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 260 DEG C, heat treatment
Time is 160min.
The 9th embodiment of preparation method of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is two roller rubber mixing machines.
Step 3 is molded after film to be placed to 18h being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 175 DEG C, vulcanization time 2min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 280 DEG C, heat treatment
Time is 260min.
The tenth embodiment of preparation method of cellular board
Step 1 mixes after weighing the raw material of electromagnetic shielding material respectively, and mixture is made；
Wherein:
Mixture is put into rubber mixing machine and is kneaded by step 2, and film is made, wherein rubber mixing machine is two roller rubber mixing machines.
Step 3 is molded after placing film for 24 hours being put into vulcanizing press, cellular board blank is made, wherein vulcanizing
Temperature is 180 DEG C, vulcanization time 2min.
Cellular board blank is heat-treated by step 4, obtains cellular board, and wherein heat treatment temperature is 300 DEG C, heat treatment
Time is 60min.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (9)
1. a kind of electromagnetic shielding material, which is characterized in that the mass fraction of raw material contained by the electromagnetic shielding material and each raw material
Are as follows:
Silicone rubber matrix: 100 parts；Carbon nanotube: 5~30 parts；Silane coupling agent: 1~5 part；Dispersing agent: 1~20 part；Vulcanization
Agent: 1~10 part.
2. electromagnetic shielding material according to claim 1, which is characterized in that the silicone rubber matrix is methyl ethylene silicon
At least one of rubber, methyl phenyl vinyl silicone rubber or fluorine silicone rubber.
3. electromagnetic shielding material according to claim 1, which is characterized in that the diameter of the carbon nanotube is 2~40nm.
4. electromagnetic shielding material according to claim 1, which is characterized in that the length of the carbon nanotube is 1~400 μ
m。
5. a kind of cellular board, which is characterized in that be made of the described in any item electromagnetic shielding materials of claim 1-4.
6. a kind of preparation method of cellular board described in claim 5, which is characterized in that include the following steps,
Step 1 mixes after weighing the raw material of electromagnetic shielding material according to mass parts ratio, and mixture is made；
The mixture is put into rubber mixing machine and is kneaded by step 2, and film is made；
The film is put into vulcanizing press and is molded by step 3, and cellular board blank is made；
The cellular board blank is heat-treated by step 4, obtains cellular board.
7. the preparation method of cellular board according to claim 6, which is characterized in that the film placement is less than or equal to
Vulcanizing press is put into afterwards for 24 hours to be molded；
The rubber mixing machine is two rollers or three roller rubber mixing machines.
8. the preparation method of cellular board according to claim 7, which is characterized in that in the step 3 curing temperature be 100~
300 DEG C, vulcanization time is 1~10min；
Heat treatment temperature is 120~300 DEG C in the step 4, and heat treatment time is 60~600min.
9. electromagnetic shielding material described in claim 1 is in network communication apparatus, Medical Devices, aerospace, intelligent driving, object
Application in networking arenas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810898232.1A CN109096773A (en) | 2018-08-08 | 2018-08-08 | The preparation method and application of electromagnetic shielding material, cellular board and cellular board |
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| CN201810898232.1A CN109096773A (en) | 2018-08-08 | 2018-08-08 | The preparation method and application of electromagnetic shielding material, cellular board and cellular board |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070018142A1 (en) * | 2003-10-16 | 2007-01-25 | Jong-Hwa Kwon | Electromagnetic shielding material having carbon nanotube and metal as eletrical conductor |
| CN105196622A (en) * | 2015-09-22 | 2015-12-30 | 北京新立机械有限责任公司 | Cellular high-temperature-resistant material of wave-absorbing structure |
| CN107974069A (en) * | 2016-10-21 | 2018-05-01 | 洛阳尖端技术研究院 | A kind of carbon nanotubes base absorbing meta-material base material and preparation method thereof |
-
2018
- 2018-08-08 CN CN201810898232.1A patent/CN109096773A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070018142A1 (en) * | 2003-10-16 | 2007-01-25 | Jong-Hwa Kwon | Electromagnetic shielding material having carbon nanotube and metal as eletrical conductor |
| CN105196622A (en) * | 2015-09-22 | 2015-12-30 | 北京新立机械有限责任公司 | Cellular high-temperature-resistant material of wave-absorbing structure |
| CN107974069A (en) * | 2016-10-21 | 2018-05-01 | 洛阳尖端技术研究院 | A kind of carbon nanotubes base absorbing meta-material base material and preparation method thereof |
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Application publication date: 20181228 |