CN112521743A - Composite material of electromagnetic shielding layer of power frequency electric field probe - Google Patents
Composite material of electromagnetic shielding layer of power frequency electric field probe Download PDFInfo
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- CN112521743A CN112521743A CN202011262701.4A CN202011262701A CN112521743A CN 112521743 A CN112521743 A CN 112521743A CN 202011262701 A CN202011262701 A CN 202011262701A CN 112521743 A CN112521743 A CN 112521743A
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- electric field
- frequency electric
- power frequency
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- shielding layer
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- 230000005684 electric field Effects 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 32
- 239000000523 sample Substances 0.000 title claims abstract description 29
- 239000000835 fiber Substances 0.000 claims abstract description 24
- 239000011347 resin Substances 0.000 claims abstract description 16
- 229920005989 resin Polymers 0.000 claims abstract description 16
- 239000011159 matrix material Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 229920001643 poly(ether ketone) Polymers 0.000 claims abstract description 13
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 11
- 239000004917 carbon fiber Substances 0.000 claims abstract description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229920000728 polyester Polymers 0.000 claims abstract description 11
- 238000000576 coating method Methods 0.000 claims abstract description 7
- 239000011248 coating agent Substances 0.000 claims abstract description 6
- 238000013329 compounding Methods 0.000 claims abstract description 5
- 238000005470 impregnation Methods 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- QZHBYJZCGCZMDC-UHFFFAOYSA-N OC=1C(C2=CC3=CC=CC=C3C2=CC1O)=O Chemical compound OC=1C(C2=CC3=CC=CC=C3C2=CC1O)=O QZHBYJZCGCZMDC-UHFFFAOYSA-N 0.000 claims description 2
- 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 2
- 238000007334 copolymerization reaction Methods 0.000 claims description 2
- 238000012643 polycondensation polymerization Methods 0.000 claims description 2
- 230000005686 electrostatic field Effects 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 5
- 238000011156 evaluation Methods 0.000 abstract description 4
- 230000005672 electromagnetic field Effects 0.000 abstract description 3
- 239000000805 composite resin Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000011257 shell material Substances 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
- C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
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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
- H05K9/009—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising electro-conductive fibres, e.g. metal fibres, carbon fibres, metallised textile fibres, electro-conductive mesh, woven, non-woven mat, fleece, cross-linked
-
- 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
- C08K2201/001—Conductive additives
-
- 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
- C08L2205/16—Fibres; Fibrils
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses an electromagnetic shielding layer composite material for a power frequency electric field probe, which is characterized in that: the polyester fiber structure of the electromagnetic shielding layer composite material for the power frequency electric field probe is formed by compounding a polyether ketone resin matrix and nickel-plated carbon fiber powder through wet impregnation, and the nickel-plated carbon fiber powder is uniformly dispersed in the polyether ketone resin matrix. According to the invention, the conductivity and the refraction and reflection rate are improved by the staggered micro-structure formed by the conductive fiber powder composite resin matrix, and the shielding efficiency of various high-frequency electromagnetic fields can be improved by uniformly coating six surfaces in the plastic shell to form a closed package, so that the interference of an internal electrostatic field and an external high-frequency electric field is reduced, and the measurement accuracy and the evaluation reliability of a power frequency electric field are improved.
Description
Technical Field
The invention relates to the technical field of shielding composite materials, in particular to an electromagnetic shielding layer composite material for a power frequency electric field probe.
Background
The power frequency electric field measuring equipment of the transformer substation is mainly a comprehensive integration body of various electronic components, and in view of cost reduction and convenience for large-scale industrial production, most of shell materials of the electronic products are made of engineering plastics, and the plastics have no conductivity and lose shielding capability to electromagnetic disturbance. On one hand, electromagnetic wave radiation causes interference to surrounding electronic and electrical equipment, and false actions are generated; on the other hand, the electromagnetic interference sensor is sensitive to the surrounding electromagnetic interference, thereby causing serious social problems such as information leakage and the like.
The traditional electric field shielding mostly adopts a metal plate grounding mode, or the plastic surface is metallized to reflect electromagnetic waves, so that the corona interference is large under the complex environment that equipment such as a transformer substation is distributed in a large number, the shielding efficiency cannot meet the use requirement, the electric field measurement accuracy is seriously influenced, and the evaluation of the environmental evaluation reliability of the transformer substation is questioned.
Disclosure of Invention
The invention aims to provide an electromagnetic shielding layer composite material for a power frequency electric field probe, which improves the conductivity and the refraction and reflection rate through a staggered micro-structure formed by a conductive fiber powder composite resin matrix, adopts a plastic shell with six surfaces uniformly coated to form a closed package, can improve the shielding efficiency of various high-frequency electromagnetic fields, reduces the interference of an internal electrostatic field and an external high-frequency electric field, and improves the measurement accuracy and the evaluation reliability of the power frequency electric field.
In order to realize the purpose, the electromagnetic shielding layer composite material of the power frequency electric field probe is characterized in that: the polyester fiber structure of the electromagnetic shielding layer composite material for the power frequency electric field probe is formed by compounding a polyether ketone resin matrix and nickel-plated carbon fiber powder through wet impregnation, and the nickel-plated carbon fiber powder is uniformly dispersed in the polyether ketone resin matrix.
The invention has the beneficial effects that:
the composite fiber coating is light in weight, the weight of a probe and the power frequency electromagnetic field measurement accuracy are not changed after spraying, the energy of electromagnetic waves can be effectively absorbed by the vertically and horizontally staggered structure, and the shielding efficiency can reach more than 35dB within the frequency range of 30-1000 MHz. The influence of the electrostatic field effect that inside components and parts produced to measuring can effectively be eliminated to the sealed parcel that forms behind six internal coating in the plastic casing, and measurement accuracy effectively improves. The fiber material has the characteristics of good rigidity, high impact strength, strong oxidation resistance stability and good mechanical property, and has the function of keeping shielding on electromagnetic waves with different frequencies for a long time.
The invention can be used for shielding aerospace and military instruments and equipment, and is suitable for high-precision and high-sensitivity products with strict requirements.
Drawings
FIG. 1 is a diagram of a composite shielding material double layer structure;
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the invention relates to an electromagnetic shielding layer composite material for a power frequency electric field probe, which is characterized in that a polyester fiber structure is formed by compounding a polyether ketone resin matrix and nickel-plated carbon fiber powder through wet impregnation, and the nickel-plated carbon fiber powder is uniformly dispersed in the polyether ketone resin matrix to form a stable system structure.
In the technical scheme, the mass filling ratio of the nickel-plated carbon fiber powder to the polyether ketone resin matrix is 15-30%, so that the flexibility, heat resistance and mechanical property of the resin are improved.
In the technical scheme, the polyester fiber structure is formed by one-time compression molding through a micro-vibration cutting filling method, so that the material with a flat and smooth surface and controllable fiber content and size is prepared.
In the technical scheme, the fibers in the polyester fiber structure are transversely and longitudinally arranged in a 90-degree multilayer transverse staggered manner, so that the non-polarity of the resin is increased, the water absorption is reduced, and the humidity and heat resistance are greatly improved.
In the technical scheme, the polyether ketone resin matrix is prepared by carrying out polycondensation and copolymerization on dihydroxy fluorenone and bisphenol A.
In the technical scheme, the length-diameter ratio of the fibers in the polyester fiber structure is 159, so that the problems of poor resin plasticizing and melting, surface wrinkling and the like are solved.
In the technical scheme, the composite material of the electromagnetic shielding layer of the power frequency electric field probe is uniformly coated inside the power frequency electric field plastic waterproof shell.
According to the technical scheme, the six internal sides of the power frequency electric field plastic shell are all sprayed by a two-layer spraying method, one layer of power frequency electric field probe electromagnetic shielding layer composite material is sprayed on the surface of the plastic, the other layer of power frequency electric field probe electromagnetic shielding layer composite material is sprayed after drying and curing, the spraying thickness of each layer of shielding coating is 1mm after drying, and the adhesive force and the service life of the coating are improved.
Referring to the attached drawing 1, when electromagnetic waves are radiated on the shielding material, the radiation-proof fibers uniformly distributed in the material become a conductive medium, so that part of the electromagnetic waves can be reflected back, the transmission amount of the electromagnetic waves is reduced, the electromagnetic shielding effect is the sum of the reflection loss of the electromagnetic waves, the absorption loss of the electromagnetic waves and the loss of the electromagnetic waves in the multiple reflection process in the shielding material, and the whole electromagnetic shielding effect is mainly the reflection loss.
The polyether ketone based nickel-plated carbon fiber composite material is prepared by high-filling compounding of conductive fiber powder and resin, wherein the filling mass proportion of the fiber powder is 15%, and the production process adopts a micro-vibration cutting filling method for one-time compression molding. The polyester fiber is a microstructure which is staggered at 90 degrees, and after two layers of coatings are uniformly sprayed, the grid structure of the composite fiber matrix can be more compact. When the power frequency electric field probe is designed to be shielded, composite fibers with the length-diameter ratio of 159 are used, after 6 surfaces of a plastic shell of the power frequency electric field probe are uniformly coated and are attenuated by two layers of refraction and reflection, the shielding efficiency can reach more than 35dB within the frequency range of 30-1000 MHz, and the frequency ranges of an internal electrostatic field and an external high-frequency electromagnetic wave are basically covered. The material has the characteristics of good rigidity, high impact strength, strong oxidation resistance stability and good mechanical property, and has the function of keeping shielding on electromagnetic waves with different frequencies for a long time.
Experiments show that the electromagnetic shielding layer composite material of the power frequency electric field probe has the shielding effects of 67dB, 48dB and 37dB respectively when the frequency is 100 MHz, 500 MHz and 1000MHz, and can effectively shield the interference effect of an internal electrostatic field and an external high-frequency electric field. Within the frequency range of 30-1000 MHz, the shielding efficiency can reach more than 35 dB. The composite material has the characteristics of good rigidity, high impact strength, strong oxidation resistance stability and good mechanical property, and has the function of keeping shielding on electromagnetic waves with different frequencies for a long time.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (9)
1. The utility model provides a power frequency electric field probe electromagnetic shield layer combined material which characterized in that: the polyester fiber structure of the electromagnetic shielding layer composite material for the power frequency electric field probe is formed by compounding a polyether ketone resin matrix and nickel-plated carbon fiber powder through wet impregnation, and the nickel-plated carbon fiber powder is uniformly dispersed in the polyether ketone resin matrix.
2. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 1, wherein: the mass filling ratio of the nickel-plated carbon fiber powder to the polyether ketone resin matrix is 15-30%.
3. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 1, wherein: the polyester fiber structure is formed by one-time compression molding through a micro-vibration cutting filling method.
4. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 1, wherein: the fibers in the polyester fiber structure are transversely and longitudinally staggered in a 90-degree multilayer mode.
5. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 1, wherein: the polyether ketone resin matrix is prepared by carrying out polycondensation and copolymerization on dihydroxy fluorenone and bisphenol A.
6. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 1, wherein: the aspect ratio of the fibers in the polyester fiber structure was 159.
7. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 1, wherein: the composite material of the electromagnetic shielding layer of the power frequency electric field probe is used for being uniformly coated inside a plastic waterproof shell of the power frequency electric field.
8. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 7, wherein: six surfaces inside the power frequency electric field plastic shell are sprayed by a two-layer spraying method, wherein one layer of power frequency electric field probe electromagnetic shielding layer composite material is sprayed on the surface of the plastic, and the other layer of power frequency electric field probe electromagnetic shielding layer composite material is sprayed after drying and curing.
9. The power frequency electric field probe electromagnetic shielding layer composite material as claimed in claim 8, wherein: after drying, the spraying thickness of each shielding coating is 1 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262701.4A CN112521743A (en) | 2020-11-12 | 2020-11-12 | Composite material of electromagnetic shielding layer of power frequency electric field probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011262701.4A CN112521743A (en) | 2020-11-12 | 2020-11-12 | Composite material of electromagnetic shielding layer of power frequency electric field probe |
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| Publication Number | Publication Date |
|---|---|
| CN112521743A true CN112521743A (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011262701.4A Pending CN112521743A (en) | 2020-11-12 | 2020-11-12 | Composite material of electromagnetic shielding layer of power frequency electric field probe |
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Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5717160A (en) * | 1994-08-05 | 1998-02-10 | Vermont Composities, Inc. | Electromagnetic shielding enclosure for electronic components |
| CN101087500A (en) * | 2002-12-27 | 2007-12-12 | 东丽株式会社 | Shell for electric device and manufacturing method thereof |
| CN102070932A (en) * | 2011-01-14 | 2011-05-25 | 东华大学 | Wideband wave absorbing material and application thereof |
| CN102321338A (en) * | 2011-07-15 | 2012-01-18 | 吉林大学 | Polyetheretherketone-base composite electromagnetic shielding material and preparation method thereof |
| US20120319055A1 (en) * | 2009-12-23 | 2012-12-20 | Cheil Industries Inc. | Multi-functional Resin Composite Material and Molded Product Using the Same |
| CN103724930A (en) * | 2013-05-28 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | Nickel coating carbon fiber composite material and preparation method thereof |
| JP2016196156A (en) * | 2015-04-06 | 2016-11-24 | 東邦テナックス株式会社 | Prepreg and fiber-reinforced composite material |
| US20170043562A1 (en) * | 2015-08-14 | 2017-02-16 | Crompton Technology Group Limited | Composite material |
| CN106536605A (en) * | 2014-07-28 | 2017-03-22 | 东邦特耐克丝株式会社 | Prepreg and fiber reinforced composite material |
| CN108034345A (en) * | 2017-12-16 | 2018-05-15 | 国网辽宁省电力有限公司电力科学研究院 | A kind of coating of efficient absorption power frequency electromagnetic field |
| CN110746740A (en) * | 2019-10-21 | 2020-02-04 | 暨南大学 | PEEK electromagnetic shielding material and preparation method and application thereof |
| CN111732815A (en) * | 2020-07-13 | 2020-10-02 | 扬州市维纳复合材料科技有限公司 | Preparation method of functional polyether-ether-ketone carbon fiber composite material |
-
2020
- 2020-11-12 CN CN202011262701.4A patent/CN112521743A/en active Pending
Patent Citations (12)
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| US5717160A (en) * | 1994-08-05 | 1998-02-10 | Vermont Composities, Inc. | Electromagnetic shielding enclosure for electronic components |
| CN101087500A (en) * | 2002-12-27 | 2007-12-12 | 东丽株式会社 | Shell for electric device and manufacturing method thereof |
| US20120319055A1 (en) * | 2009-12-23 | 2012-12-20 | Cheil Industries Inc. | Multi-functional Resin Composite Material and Molded Product Using the Same |
| CN102070932A (en) * | 2011-01-14 | 2011-05-25 | 东华大学 | Wideband wave absorbing material and application thereof |
| CN102321338A (en) * | 2011-07-15 | 2012-01-18 | 吉林大学 | Polyetheretherketone-base composite electromagnetic shielding material and preparation method thereof |
| CN103724930A (en) * | 2013-05-28 | 2014-04-16 | 太仓派欧技术咨询服务有限公司 | Nickel coating carbon fiber composite material and preparation method thereof |
| CN106536605A (en) * | 2014-07-28 | 2017-03-22 | 东邦特耐克丝株式会社 | Prepreg and fiber reinforced composite material |
| JP2016196156A (en) * | 2015-04-06 | 2016-11-24 | 東邦テナックス株式会社 | Prepreg and fiber-reinforced composite material |
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Application publication date: 20210319 |
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