CN104892829B - For electromagnetic-field-shielded absorbing material - Google Patents
For electromagnetic-field-shielded absorbing material Download PDFInfo
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- CN104892829B CN104892829B CN201510260481.4A CN201510260481A CN104892829B CN 104892829 B CN104892829 B CN 104892829B CN 201510260481 A CN201510260481 A CN 201510260481A CN 104892829 B CN104892829 B CN 104892829B
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Abstract
The present invention disclose it is a kind of be used for electromagnetic-field-shielded absorbing material, the absorbing material is composed of the following components：100 parts of wave-absorbing powder, 20 ~ 35 parts of butyl acrylate, 10 ~ 20 parts of acrylic acid, 20 ~ 35 parts of Isooctyl acrylate monomer, 10 ~ 30 parts of methyl methacrylate, 1 ~ 3 part of vinyl acetate, 0.1 ~ 1 part of 2 hydroxyl ethyl ester of methacrylic acid, 0.5 ~ 2 part of Sodium Polyacrylate, 0.4 ~ 1 part of methyl ethyl ketone peroxide；The wave-absorbing powder is composed of the following components：BaFe12O19, nickel sesquioxide, Nano graphite powder, naphthoic acid cobalt, unsaturated polyester (UP), acrylic compounds levelling agent.The present invention reaches 88% in the attenuation rates of 2 ~ 10GHz electromagnetic waves, and it is gluing to not only improve polymer, also mixed powder is uniformly dispersed in the polymer, so as to ensure that the reliability of electromagnetic performance.
Description
Technical field
The invention belongs to technical field of electronic materials, more particularly to a kind of it is used for electromagnetic-field-shielded absorbing material.
Background technology
With the development of electronics industry, increasing electric equipment products has come into the life of people, and these products
The influence for the Electromagnetic Radiation on Environment brought also increasingly increases.The electromagnetic wave of electronic product release, other electronics of surrounding can be given
Equipment belt carrys out electromagnetic interference, makes its operation irregularity；Health can also be damaged simultaneously.Therefore, research and development can weaken electricity
The absorbing material of magnetic radiation, have become the heat subject of material science concern.
Absorbing material is a kind of material for referring to effectively absorb incident electromagnetic wave and make it decay, and it passes through different damages
Incident electromagnetic wave is changed into heat energy or other form of energy to reach the purpose of suction ripple by consumption mechanism.In absorbing material, paster
Type absorbing material thickness of thin, it is easy to use, for reducing electromagnetic radiation, preventing electromagnetic interference from having good effect, relatively it is adapted to
Apply in electronic product.And the main trend of electronic product development is miniaturization, Highgrade integration, interiors of products space is relative
It is narrow and small.Therefore, on the premise of absorbing property is ensured how by material manufacture enough to it is thin be the biggest problem that people face.
The content of the invention
Present invention offer is a kind of to be used for electromagnetic-field-shielded absorbing material, and the absorbing material declines 2 ~ 10GHz electromagnetic waves
Lapse rate reaches 88%, and it is gluing to not only improve polymer, also mixed powder is uniformly dispersed in the polymer, so as to ensure that electricity
The reliability of magnetic property.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：It is a kind of to be used for electromagnetic-field-shielded absorbing material, bag
Include the graphite flake as reflecting layer, absorbed layer and separated type material layer；It is gluing that first is provided between the graphite flake, absorbed layer
Layer；The second adhesive layer is provided between the absorbed layer, separated type material layer；
The suction ripple layer is composed of the following components：
100 parts of wave-absorbing powder,
20 ~ 35 parts of butyl acrylate,
10 ~ 20 parts of acrylic acid,
20 ~ 35 parts of Isooctyl acrylate monomer,
10 ~ 30 parts of methyl methacrylate,
1 ~ 3 part of vinyl acetate,
0.1 ~ 1 part of 2-hydroxyethyl methacry-late,
0.5 ~ 2 part of Sodium Polyacrylate,
0.4 ~ 1 part of methyl ethyl ketone peroxide；
The wave-absorbing powder is composed of the following components：
BaFe12O19100 parts,
38 ~ 42 parts of nickel sesquioxide,
9 ~ 12 parts of Nano graphite powder,
12 ~ 22 parts of naphthoic acid cobalt,
50 ~ 60 parts of unsaturated polyester (UP),
40 ~ 50 parts of acrylic compounds levelling agent.
Further improved technical scheme is as follows in above-mentioned technical proposal：
1st, in such scheme, BaFe in the wave-absorbing powder12O19, nickel sesquioxide, Nano graphite powder and naphthoic acid cobalt according to
10：4：1：2 weight ratios mix.
2nd, in such scheme, the separated type material layer is off-style paper layer or release film layer.
3rd, in such scheme, first adhesive layer, the second adhesive layer are esters of acrylic acid adhesive layer.
4th, in such scheme, the unsaturated polyester (UP) synthesized by maleic anhydride, phthalic anhydride and propane diols and
Into.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：
The present invention is used for electromagnetic-field-shielded absorbing material, and it uses composite wave-absorbing powder BaFe12O19100 parts, three oxidations
20 ~ 35 parts of two nickel, Nano graphite powder, naphthoic acid cobalt and butyl acrylate, 10 ~ 20 parts of acrylic acid, 20 ~ 35 parts of Isooctyl acrylate monomer,
0.1 ~ 1 part of methyl methacrylate 10 ~ 30, vinyl acetate 1 ~ 3,2-hydroxyethyl methacry-late synergy, have stronger
Electromaganic wave absorbing property, reach 88% in the attenuation rate of 2 ~ 10GHz electromagnetic waves, further add 0.5 ~ 2 part of Sodium Polyacrylate, mistake
0.4 ~ 1 part of MEKP, it is gluing to not only improve polymer, also mixed powder is uniformly dispersed in the polymer, so as to protect
The reliability of electromagnetic performance is demonstrate,proved；Secondly, further it is equipped with unsaturated polyester (UP) in formula, acrylic compounds levelling agent improves entirely
The heat conductivility of ripple layer is inhaled, the stability and product for being advantageous to, by heat expanding caused by electromagnetic wave, improve performance use the longevity
Life.
Embodiment
With reference to embodiment, the invention will be further described：
Embodiment 1 ~ 4：A kind of to be used for electromagnetic-field-shielded absorbing material, the absorbing material is composed of the following components, group
Divide and content is as shown in table 1：
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| Wave-absorbing powder | 100 parts | 100 parts | 100 parts | 100 parts |
| Butyl acrylate | 20 parts | 32 parts | 30 parts | 28 parts |
| Acrylic acid | 10 parts | 15 parts | 18 parts | 20 parts |
| Isooctyl acrylate monomer | 25 parts | 22 parts | 32 parts | 35 parts |
| Methyl methacrylate | 18 parts | 26 parts | 12 parts | 28 parts |
| Vinyl acetate | 1 part | 2.8 part | 1.8 part | 2 parts |
| 2-hydroxyethyl methacry-late | 0.2 part | 0.5 part | 0.8 part | 0.6 part |
| Sodium Polyacrylate | 1.5 part | 2 parts | 1.2 part | 0.9 part |
| Methyl ethyl ketone peroxide | 0.6 part | 0.9 part | 0.6 part | 0.8 part |
The wave-absorbing powder as shown in Table 2 content groups packet into：
Table 2
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | |
| BaFe12O19 | 100 parts | 100 parts | 100 parts | 100 parts |
| Nickel sesquioxide | 38 parts | 40 parts | 42 parts | 40 parts |
| Nano graphite powder | 12 parts | 10 parts | 9 parts | 10 parts |
| Naphthoic acid cobalt | 19 parts | 20 parts | 22 parts | 20 parts |
| Unsaturated polyester (UP) | 52 parts | 60 parts | 55 parts | 50 parts |
| Acrylic compounds levelling agent | 40 parts | 50 parts | 48 parts | 42 parts |
Above-mentioned unsaturated polyester (UP) is synthesized by maleic anhydride, phthalic anhydride and propane diols and formed.
Embodiment 1 ~ 4 is as shown in table 3 in the maximum reflection coefficient and effective bandwidth of 2 ~ 18GHz frequency ranges：
Table 3
| Inhale ripple thickness degree | Maximum reflection coefficient（dB） | ≤ -8 dB effective bandwidths（GHz） | |
| Embodiment 1 | 0.2mm | -21 | 2~13 |
| Embodiment 2 | 0.4mm | -23 | 2~15 |
| Embodiment 3 | 0.6mm | -30 | 2~16 |
| Embodiment 4 | 0.8mm | -35 | 2~18 |
Inhale ripple layer and the electromagnetic wave that electronic product discharges is converted into heat energy or other forms in a manner of electrical loss, magnetic loss etc.
Energy with reach reduce electromagnetic radiation effect, have preferable absorption in the range of 2 ~ 18GHz, can by incidence electromagnetic wave
Reflection resorption ripple layer forms multiple absorption.
Above-described embodiment is used for the preparation technology of electromagnetic-field-shielded absorbing material, comprises the following steps：
The first step：By BaFe12O19100 parts, 38 ~ 42 parts of nickel sesquioxide, 9 ~ 12 parts of Nano graphite powder, naphthoic acid cobalt 18 ~ 22
Part, 50 ~ 60 parts of unsaturated polyester (UP), 40 ~ 50 parts of acrylic compounds levelling agent are well mixed, and 84 ~ 86 DEG C of conditions stir to be formed it is mixed
Close powder；
Second step：By 20 ~ 35 parts of butyl acrylate, 10 ~ 20 parts of acrylic acid, 20 ~ 35 parts of Isooctyl acrylate monomer, metering system
Sour methyl esters 10 ~ 30, vinyl acetate 1 ~ 3,0.1 ~ 1 part of 2-hydroxyethyl methacry-late, 0.5 ~ 2 part of Sodium Polyacrylate and the first step
Mixed powder mixing, and disperse 1 ~ 2 hour through high speed agitator, mixture formed so as to well mixed；
3rd step：It is incubated after the mixture of second step is heated into 80 ~ 85 DEG C in a kettle, point 1 in insulating process ~
3 0.4 ~ 1 part of addition methyl ethyl ketone peroxides, which obtain, inhales ripple mixed liquor, and the soaking time is 4 ~ 10 hours；
4th step：The suction ripple mixed liquor that 3rd step obtains is coated on substrate；
5th step：Baking is carried out to the suction ripple mixed liquor in the 4th step and forms suction ripple layer.
Using it is above-mentioned be used for electromagnetic-field-shielded absorbing material when, there is stronger electromaganic wave absorbing property, in 2 ~ 10GHz
The attenuation rate of electromagnetic wave reaches 88%, further adds 0.5 ~ 2 part of Sodium Polyacrylate, 0.4 ~ 1 part of methyl ethyl ketone peroxide, both favorably
It is gluing in polymer, also mixed powder is uniformly dispersed in the polymer, so as to ensure that the reliability of electromagnetic performance；Its
It is secondary, further it is equipped with unsaturated polyester (UP) in formula, acrylic compounds levelling agent improves the whole heat conductivility for inhaling ripple layer, is advantageous to
By heat expanding caused by electromagnetic wave, the stability and product service life of performance are improved.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all according to the present invention
The equivalent change or modification that Spirit Essence is made, it should all be included within the scope of the present invention.
Claims (3)
1. a kind of be used for electromagnetic-field-shielded absorbing material, it is characterised in that：The absorbing material is composed of the following components：
100 parts of wave-absorbing powder,
20 ~ 35 parts of butyl acrylate,
10 ~ 20 parts of acrylic acid,
20 ~ 35 parts of Isooctyl acrylate monomer,
10 ~ 30 parts of methyl methacrylate,
1 ~ 3 part of vinyl acetate,
0.1 ~ 1 part of 2-hydroxyethyl methacry-late,
0.5 ~ 2 part of Sodium Polyacrylate,
0.4 ~ 1 part of methyl ethyl ketone peroxide；
The wave-absorbing powder is composed of the following components：
BaFe12O19100 parts,
38 ~ 42 parts of nickel sesquioxide,
9 ~ 12 parts of Nano graphite powder,
18 ~ 22 parts of naphthoic acid cobalt,
50 ~ 60 parts of unsaturated polyester (UP),
40 ~ 50 parts of acrylic compounds levelling agent.
2. according to claim 1 be used for electromagnetic-field-shielded absorbing material, it is characterised in that：In the wave-absorbing powder
BaFe12O19, nickel sesquioxide, Nano graphite powder and naphthoic acid cobalt be according to 10：4：1：2 weight ratios mix.
3. according to claim 1 be used for electromagnetic-field-shielded absorbing material, it is characterised in that：The unsaturated polyester (UP) by
Maleic anhydride, phthalic anhydride and propane diols synthesis form.
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| CN201510260481.4A CN104892829B (en) | 2015-05-21 | 2015-05-21 | For electromagnetic-field-shielded absorbing material |
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| CN201510260481.4A CN104892829B (en) | 2015-05-21 | 2015-05-21 | For electromagnetic-field-shielded absorbing material |
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| CN104892829A CN104892829A (en) | 2015-09-09 |
| CN104892829B true CN104892829B (en) | 2017-12-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110144058A (en) * | 2019-04-26 | 2019-08-20 | 吉翔宝（太仓）离型材料科技发展有限公司 | A kind of release film with suction wave energy |
| CN116487849A (en) * | 2019-12-27 | 2023-07-25 | 阿里巴巴集团控股有限公司 | Filter and quantum chip measurement and control system |
| CN113493898B (en) * | 2020-04-08 | 2022-05-24 | 中国科学院物理研究所 | Ferromagnetic insulating material and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830691A (en) * | 2009-03-13 | 2010-09-15 | 中国科学院福建物质结构研究所 | Method for synthesizing nano ferrite soft magnetic material |
| CN103740233A (en) * | 2014-01-08 | 2014-04-23 | 南京信息工程大学 | Micrometer wave absorbing coating material and preparation method thereof |
| CN103923337A (en) * | 2014-04-30 | 2014-07-16 | 湖南兆恒材料科技有限公司 | Composite polymethacrylimide foam wave absorption material |
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2015
- 2015-05-21 CN CN201510260481.4A patent/CN104892829B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830691A (en) * | 2009-03-13 | 2010-09-15 | 中国科学院福建物质结构研究所 | Method for synthesizing nano ferrite soft magnetic material |
| CN103740233A (en) * | 2014-01-08 | 2014-04-23 | 南京信息工程大学 | Micrometer wave absorbing coating material and preparation method thereof |
| CN103923337A (en) * | 2014-04-30 | 2014-07-16 | 湖南兆恒材料科技有限公司 | Composite polymethacrylimide foam wave absorption material |
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