CN106752490A - A kind of broadband electromagnetical shielding material - Google Patents
A kind of broadband electromagnetical shielding material Download PDFInfo
- Publication number
- CN106752490A CN106752490A CN201610989209.4A CN201610989209A CN106752490A CN 106752490 A CN106752490 A CN 106752490A CN 201610989209 A CN201610989209 A CN 201610989209A CN 106752490 A CN106752490 A CN 106752490A
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- China
- Prior art keywords
- shielding material
- coupling agent
- broadband electromagnetical
- titanate coupling
- carbon black
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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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
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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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/45—Anti-settling agents
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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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Paints Or Removers (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses a kind of broadband electromagnetical shielding material, peace percentage by weight includes：Acrylic resin 85 95%, titanate coupling agent 2 10%, CNT 0.5 10%, carbon black 0.2 5%.The addition of carbon nanotubes of the invention and carbon black coating, effectively increase the efficiency of electromagnetic shielding, in 10KHz~2MHz shield effectiveness >=40dB, 2MHz~7GHz shield effectiveness >=42dB, 7GHz~8GHz >=47dB, 8GHz~18GHz >=46dB, and physical property to film do not have any impact.
Description
Technical field
The present invention relates to new material technology field, more particularly to a kind of broadband electromagnetical shielding material.
Background technology
In modern society, electronization, informationization is developed rapidly, brings a very important problem --- and electromagnetism is dirty
Dye, while electronic component develops to miniaturization, Highgrade integration direction, sensitivity more and more higher, it is easy to by external interference.
Electromagnetic Interference, electromagnetic wave information are divulged a secret and the harm etc. of electromagnetic environment has turned into the problem that people increasingly pay close attention to.After making an uproar
After sound pollution, air pollution, water pollution, Contamination of Electromagnetic Wave turns into the fourth-largest public hazards for threatening human health.Explore efficient
Electromagnetic shielding material, prevents electromagenetic wave radiation from polluting with environmental protection and health, prevents from electromagnetic-wave leakage to ensure information
Safety, has become current problem in the urgent need to address in the world.
Shielding is one of important measures of raising electronic system and electronic equipment Electro Magnetic Compatibility, and electromagenetic wave radiation is carried out
The relatively effective technical cue that control is usually taken, mainly there is two aspects：One is by optimization design；Two is shield technology.
Shielding is divided into electrical shielding, magnetic screen and electromagnetic shielding by its mechanism.Electromagnetic shielding is to prevent electromagnetic field in space using shield
A kind of method propagated.The shield effectiveness of shield and the electrical conductivity of shielding material and magnetic conductivity, the structure of shield and shielded
The frequency for covering electromagnetic field is relevant.The good material of research lightweight, shield effectiveness is one of key of solution shielding problem.
Currently used shielding material has：Amorphous metal electromagnetic shielding material, conducting polymer composite (conducting polymer
Plastics, electrically-conducting paint, conductive adhesive), foaming metal, fabric composite etc..Divided by technological requirement, can be divided into again
Individual layer template, Multi-layer composite, application type, structural type etc..When screen method and material is selected, effect and cost are taken into account.Mesh
In preceding selection electromagnetic shielding material, coating account for critical role.In the U.S., according to statistics in the application of various screen methods, coating
The method of electrically-conducting paint accounts for 80%.Coating as new functional towards wideband, highfield, highly attenuating degree, the long-life,
Inexpensive easy construction direction is developed.
Electromagnetic screen coating is generally made up of synthetic resin, conductive filler or wave absorbing agent, solvent and additive, conductive filler
There are metal system, carbon system, metal oxide and compounded mix system etc..
The content of the invention
It is an object of the invention to propose a kind of broadband electromagnetical shielding material, there are more preferably electric conductivity, broader shielding band
Width, more preferable Electro Magnetic Compatibility；Meanwhile, low thickness, high adhesion force, excellent weatherability, low-density, low cost, nuisanceless etc..
It is that, up to this purpose, the present invention uses following technical scheme：
A kind of broadband electromagnetical shielding material, peace percentage by weight includes：
Acrylic resin 85-95%
Titanate coupling agent 2-10%
CNT 0.5-10%
Carbon black 0.2-5%.
Preferably, acrylic resin viscosity of the present invention is in 8000~110000 mpas.
The effect of titanate coupling agent mainly improves dispersiveness of the color stuffing in organic base-material, Yi Jijie in coating
Save raw material and energy consumption.Titanate coupling agent use in the coating can reduce pigment in binding material (base-material) content, be allowed to connect
It is bordering on the concentration of critical pigment volume.In various resin-filler systems, titanate coupling agent can be greatly lowered system and glue
Degree, thus in addition to improving the anti-settling performance of color stuffing, solvent load can be also greatlyd save, high concentration mill base is obtained.Due to titanium
Modified effect is generated after acid esters coupling agent treatment color stuffing, so as to various physical properties of paint film can be improved, such as vividness, resistance to
Mill property, anti-flammability, corrosion resistance etc..
The structure of titanate coupling agent can be represented with below formula：(RO)4-nIn-Ti (OX-R '-Y) n formulas：n：2-3；
RO：Hydrolyzable lower alkyloxy, OX-：- COOH ,-SO3H ,-R, phosphorous acyloxy；R：Long chain alkane base；Y：-OH、-NH2：、
Epoxy radicals.For example, isopropyl alkyl three (dioctylphyrophosphoric acid) titanate esters.
If CNT is merely thought as a kind of addition of filler in coating, the performance of film may be caused
Certain influence, but CNT its good mechanical performance, and antifatigue, creep resistant, scantling stabilization, its friction system
Number is small, therefore sliding capability is good.Influence to film is smaller.
The performance of conductive filler directly affects the shield effectiveness of electromagnetic screen coating, but, single conductive filler is difficult
There is the requirement of preferable shield effectiveness in frequency range wider to meet, such as the good conductor of copper electricity is to high impedance electric field
There is preferable shielding action, and the shielding to Low ESR magnetic field is undesirable.
For these reasons, with carbon black be used in conjunction CNT by the present invention.The present invention by experimental verification, receive by single carbon
Its wave-absorbing effect of mitron is poor, and after being only combined with carbon black, wave-absorbing effect could be improved, and the two has collaboration in the system
Effect.
The addition of carbon nanotubes of the invention and carbon black coating, effectively increases the efficiency of electromagnetic shielding, 10KHz~
2MHz shield effectiveness >=40dB, 2MHz~7GHz shield effectiveness >=42dB, 7GHz~8GHz >=47dB, 8GHz~18GHz >=
46dB, and physical property to film do not have any impact.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of broadband electromagnetical shielding material, peace percentage by weight includes：
Acrylic resin 85%
Titanate coupling agent 10%
CNT 4%
Carbon black 1%.
Embodiment 2
A kind of broadband electromagnetical shielding material, peace percentage by weight includes：
Acrylic resin 95%
Titanate coupling agent 2%
CNT 2%
Carbon black 1%.
Embodiment 3
A kind of broadband electromagnetical shielding material, peace percentage by weight includes：
Acrylic resin 90%
Titanate coupling agent 3%
CNT 4%
Carbon black 3%.
The addition of the carbon nanotubes and carbon black coating of embodiment 1-3, effectively increases the efficiency of electromagnetic shielding,
10KHz~2MHz shield effectiveness >=40dB, 2MHz~7GHz shield effectiveness >=42dB, 7GHz~8GHz >=47dB, 8GHz~
18GHz >=46dB, and physical property to film do not have any impact.
Comparative example 1
The carbon black in embodiment 1 is omitted, remaining is same as Example 1.
Comparative example 2
The CNT of embodiment 1 is omitted, remaining is same as Example 1.
Comparative example 3
Acrylic resin in embodiment 1 is substituted for epoxy resin.
The shield effectiveness of each frequency range of comparative example 1-3 is respectively less than 30dB.Thus prove that material of the invention produces collaboration
Effect.
Claims (4)
1. a kind of broadband electromagnetical shielding material, peace percentage by weight includes：
Acrylic resin 85-95%
Titanate coupling agent 2-10%
CNT 0.5-10%
Carbon black 0.2-5%.
2. broadband electromagnetical shielding material as claimed in claim 1, it is characterised in that acrylic resin viscosity of the present invention
In 8000~110000 mpas.
3. broadband electromagnetical shielding material as claimed in claim 1 or 2, it is characterised in that the structure of titanate coupling agent is as follows：
(RO)4-nIn-Ti (OX-R '-Y) n formulas：n：2-3；RO：Hydrolyzable lower alkyloxy, OX-：- COOH ,-SO3H ,-R, phosphorous acyl
Epoxide；R：Long chain alkane base；Y：-OH、-NH2：, epoxy radicals.
4. broadband electromagnetical shielding material as claimed in claim 3, it is characterised in that titanate coupling agent is isopropyl alkyl three
(dioctylphyrophosphoric acid) titanate esters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989209.4A CN106752490A (en) | 2016-11-10 | 2016-11-10 | A kind of broadband electromagnetical shielding material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610989209.4A CN106752490A (en) | 2016-11-10 | 2016-11-10 | A kind of broadband electromagnetical shielding material |
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| Publication Number | Publication Date |
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| CN106752490A true CN106752490A (en) | 2017-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610989209.4A Pending CN106752490A (en) | 2016-11-10 | 2016-11-10 | A kind of broadband electromagnetical shielding material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501905A (en) * | 2020-11-19 | 2021-03-16 | 嘉兴立一新材料有限公司 | Super-hydrophobic electromagnetic shielding fabric and preparation method thereof |
| CN115386179A (en) * | 2022-08-31 | 2022-11-25 | 洛阳理工学院 | Preparation method of polyvinyl chloride composite material with electromagnetic shielding and cold resistance |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417610A (en) * | 2011-07-13 | 2012-04-18 | 青岛科技大学 | Graphene/carbon nanotube hybrid polymer composite material |
| CN104837926A (en) * | 2013-12-06 | 2015-08-12 | Lg化学株式会社 | Thermoplastic resin composition for radar cover |
-
2016
- 2016-11-10 CN CN201610989209.4A patent/CN106752490A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417610A (en) * | 2011-07-13 | 2012-04-18 | 青岛科技大学 | Graphene/carbon nanotube hybrid polymer composite material |
| CN104837926A (en) * | 2013-12-06 | 2015-08-12 | Lg化学株式会社 | Thermoplastic resin composition for radar cover |
Non-Patent Citations (1)
| Title |
|---|
| 吕霞娟: "含碳纳米管新型宽频轻质电磁屏蔽材料的研制", 《工程科技Ⅰ辑》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112501905A (en) * | 2020-11-19 | 2021-03-16 | 嘉兴立一新材料有限公司 | Super-hydrophobic electromagnetic shielding fabric and preparation method thereof |
| CN115386179A (en) * | 2022-08-31 | 2022-11-25 | 洛阳理工学院 | Preparation method of polyvinyl chloride composite material with electromagnetic shielding and cold resistance |
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Application publication date: 20170531 |
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