CN109910385A - Composite material is used in shielding - Google Patents
Composite material is used in shielding Download PDFInfo
- Publication number
- CN109910385A CN109910385A CN201910075358.3A CN201910075358A CN109910385A CN 109910385 A CN109910385 A CN 109910385A CN 201910075358 A CN201910075358 A CN 201910075358A CN 109910385 A CN109910385 A CN 109910385A
- Authority
- CN
- China
- Prior art keywords
- composite material
- graphene
- shielding
- layer
- electro
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The present invention provides a kind of shielding composite material, and composite material is disposed with insulating layer, magnetic shielding layer, electro-magnetic screen layer and wearing layer from the inside to the outside.Be conducive to as the shielding composite material while insulation, magnetic shielding, electromagnetic shielding, shock proof ability being provided, is conducive to the applicability for improving composite material.
Description
Technical field
The present invention relates to a kind of novel shielding composite materials.
Background technique
Electronic product is seen everywhere, and electronic component is the basis for forming electronic product.Electronic component can generate at work
There is electromagnetic signal, other elements can be interfered to work normally, and electronic component also needs to guard against other electromagnetic signals at work
The normal operation of the electronic component is impacted.Therefore appearance now is shielded for the electromagnetic signal to electronic component
Screening arrangement.But influence the factor that electronic component works normally and be not limited to electromagnetism, magnetostatic, temperature, impact also will affect electricity
The work of subcomponent.
Summary of the invention
Primary and foremost purpose of the present invention is to provide a kind of shielding composite material that shielding properties is high.
To achieve the above object, the present invention provides a kind of shielding composite material, and composite material is set gradually from the inside to the outside
There are insulating layer, magnetic shielding layer, electro-magnetic screen layer and wearing layer.Be conducive to for the shielding composite material and meanwhile provide insulation,
Magnetic shielding, electromagnetic shielding, shock proof ability are conducive to the applicability for improving composite material.
Further scheme is that insulating layer is fine by glass fiber resin, quartz fibre resin, basalt fibre resin, aramid fiber
The composite material of at least one insulation such as dimension resin, polyparaphenylene's benzo dioxazole fibre resin is made.Be conducive to insulation, it is resistance to
The fire-retardant effect of temperature.
Further scheme is resin composite materials system of the magnetic shielding layer by permalloy or with high magnetic conduction coating fiber
At.Be conducive to external magnetic field and magnetic loop is formed by permeability magnetic material, to realize composite material to magnetostatic shielding action.
Further scheme is that electro-magnetic screen layer includes basis material and fiber cloth.Fiber cloth is fine by metallic fiber, carbon system
Dimension, conductive metal chemical combination fibres, conducting polymer fiber type at least one fiber are made.Be conducive to lead by low-resistance
Electric fiber, shields high-frequency electromagnetic signal.Also help the weight for reducing composite material.
Further scheme is that graphene is deployed on electro-magnetic screen layer by way of spraying graphite alkene suspension and is formed
Wearing layer, the spraying initial velocity of graphene suspension are greater than 381m/s, and graphene anchoring has lipophilic group.Graphene suspension tool
There is higher spraying initial velocity to be conducive to graphene suspension to be atomized in spraying, is conducive to the even application of graphene.At a high speed
When the drop of ejection hits electro-magnetic screen layer, conducive to thermal energy is converted kinetic energy into, promote the lipophilic group and electromagnetic screen of graphene
The group for covering the basis material of layer establishes chemical bond, and the edge for also helping graphene is re-engaged, and forms smooth wearing layer.
The wear-resistant strength and shock proof ability for greatling improve composite material, improve the durability of composite material, while improving electromagnetism
Screening ability.
Further scheme is, graphene have methyl, ethyl, propyl, butyl, phenyl, cyclohexyl, vinyl, acrylic,
At least one of amino, aminopropyl, aminoethylaminopropyl, mercaptopropyi and anilinomethyl amido lipophilic group.Advantageous graphene
Group and electro-magnetic screen layer basis material group between there is stronger chemical bond, improve graphene and electromagnetic screen
The binding force between layer is covered, the structural strength and surface abrasion resistance of composite material are improved.
Further scheme is that suspension includes at least one of methanol, ethyl alcohol, acetone, butanone and DMF liquid, graphite
The mass ratio of alkene and graphene suspension is between 7% to 9.5%.The degree of overlapping of graphite ene coatings is advantageously reduced, graphite is increased
The EDGE CONTACT of alkene and electromagnetic shielding layer surface, reduces the contact resistance of graphene and electro-magnetic screen layer, improves electromagnetic shielding energy
Power, while it being easily achieved the single thin layer of graphene, be conducive to the impact resistance for improving composite material.
Further scheme is to preheat before spraying to the electro-magnetic screen layer.Further be conducive to promote graphene group with
The group of basis material generates stronger chemical bond, improves the evaporation rate of liquid in graphene suspension, reduces drop
Probability is sprung back, is conducive to graphene and is adhered on electro-magnetic screen layer, form smooth wearing layer.It is also beneficial to reduce the temperature difference, subtract
The temperature difference between few graphene wearing layer and electro-magnetic screen layer, prevents from expanding with heat and contract with cold and leading to wear-resisting delamination layer.
Further scheme is that nozzle is preheating between 300 DEG C to 340 DEG C before spraying.Dynamic spraying is advantageously formed,
Graphene activity is improved, is effectively adhered on electro-magnetic screen layer conducive to graphene.
Further scheme is that graphene suspension spraying is completed after electro-magnetic screen layer gel and before being fully cured.Favorably
In the bonding force for improving graphene and electro-magnetic screen layer.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of composite material of the present invention.
Specific embodiment
There are many types of graphene.By the number of plies point, can be divided into single-layer graphene, bilayer graphene, few layer graphene and
Multi-layer graphene.By functionalised forms point, graphene oxide, redox graphene, hydrogenation graphene, fluorination stone common are
Black alkene etc..By external morphology point, including flake graphite alkene, film graphene, quantum dot graphene, nanobelt graphene, three-dimensional
Shape graphene etc..
First specific embodiment
As shown in Figure 1, the shielding box 100 is made of shielding of the invention of composite material, the composite material from the inside to the outside according to
It is secondary to be provided with insulating layer 101, magnetic shielding layer 102, electro-magnetic screen layer 103 and wearing layer 104.Be conducive to as the shielding with compound
Material provides insulation, magnetic shielding, electromagnetic shielding, shock proof ability simultaneously, is conducive to the applicability for improving composite material.
Insulating layer 101 is by glass fiber resin, quartz fibre resin, basalt fibre resin, aramid fiber resin, poly- pair
The composite material of at least one insulation such as penylene benzo dioxazole fibre resin is made.Be conducive to increase insulation, heatproof flame-retardant
Effect.Insulating layer 101 is preferably made of glass fiber resin.Insulating layer 101 can also be fabricated separately by the resin to insulate.
Resin composite materials of the magnetic shielding layer 102 by permalloy or with high magnetic conduction coating fiber are made.Be conducive to
External magnetic field forms magnetic loop by permeability magnetic material, to realize composite material to magnetostatic shielding action.Magnetic shielding layer 102 is excellent
Choosing is made of permalloy.Magnetic shielding layer 102 is not limited to be made of permalloy, can also by silicon steel etc. other high magnetic conduction materials
Material is made.
Electro-magnetic screen layer 103 includes basis material and fiber cloth.Fiber cloth is by metallic fiber, carbon series fiber, conductivity type gold
Belong to chemical combination fibres, conducting polymer fiber type at least one fiber is made.Be conducive to by low-resistance conductive fiber, to height
Frequency electromagnetic signal is shielded.Also help the weight for reducing composite material.Electro-magnetic screen layer 103 is preferably by carbon cloth and ring
Oxygen resin is made.
Shielding of the invention is preferably made up of stamper forming process with composite material.One layer of band is wound first on type core
There is the glass fibre of resin, insulating layer 101 is formed by first time pressing mold.Then permalloy is spread on the outside of insulating layer 101
With the carbon cloth for being mixed with resin, magnetic shielding layer 102 and electro-magnetic screen layer 103 are formed by second of pressing mold.The present invention
Resin be not limited to epoxy resin, can also be other resins such as phenolic resin, unsaturated polyester resin.
Further, when being conductive material as the high permeability material of magnetic shielding layer 102, which can also be with
Serve as electro-magnetic screen layer.
Preferably, auxiliary agent of the invention further includes fire retardant.The fire retardant includes melamine polyphosphate and methylphosphine
Dimethyl phthalate is conducive to the water resistance and tensile strength that improve wear-resisting prepreg to the excellent flame retardancy of epoxy resin.It can
Choosing, which can also be made of montmorillonite, melamine and melamine polyphosphate.
Preferably, 102 layers of magnetic shielding are double-layer structure, are provided with one layer of non-magnetic layer between two magnetic shielding layers, into
One step is conducive to magnetic shielding.
Preferably, the fiber cloth of electro-magnetic screen layer 103 is fiber cloth with holes, is conducive to the matrix material of the two sides of fiber with holes
Material through hole is attached.Be conducive to improve 103 structural strength of electro-magnetic screen layer.
Preferably, conductive filler is filled in the basis material of electro-magnetic screen layer 103, conductive filler includes graphene, leads
Electric carbon black, graphite powder, carbon nanotube, copper powder, silver powder etc..Be conducive to enhance the electromagnetic shielding of electro-magnetic screen layer.
Preferably, graphene suspension spraying is completed after electro-magnetic screen layer gel and before being fully cured, by spraying stone
Graphene is deployed in molding wearing layer 104 on electro-magnetic screen layer by the mode of black alkene suspension.Be conducive to improve graphene and electricity
The bonding force of magnetic masking layer.The spraying initial velocity of graphene suspension is greater than 381m/s, and graphene has lipophilic group.Graphene
Suspension spraying initial velocity with higher is conducive to graphene suspension and is atomized in spraying, is conducive to the uniform spray of graphene
It applies.When the drop of high speed ejection hits electro-magnetic screen layer, conducive to thermal energy is converted kinetic energy into, graphene is promoted to promote graphene
The group of the basis material of lipophilic group and electro-magnetic screen layer establishes chemical bond, and the edge for also helping graphene is re-engaged,
Form smooth wearing layer.The wear-resistant strength and shock proof ability for greatling improve composite material, improve the resistance to of composite material
With property, while improving electromagnetic shielding capability.Preferably, graphene of the invention spraying initial velocity is 420m/s.
Graphene can have methyl, ethyl, propyl, butyl, phenyl, cyclohexyl, vinyl, acrylic, amino, ammonia third
At least one of base, aminoethylaminopropyl, mercaptopropyi and anilinomethyl amido lipophilic group.Be conducive to the group of graphene with
There is stronger chemical bond between the group of the basis material of electro-magnetic screen layer, improve between graphene and electro-magnetic screen layer
Binding force, improve the structural strength and surface abrasion resistance of composite material.
Suspension includes at least one of methanol, ethyl alcohol, acetone, butanone and DMF liquid.Preferably, stone graphene with
The mass ratio of graphene suspension is between 7% to 9.5%.Advantageously reduce the degree of overlapping of graphite ene coatings, increase graphene with
It is electromagnetically shielded the EDGE CONTACT of layer surface, reduces the contact resistance of graphene and electro-magnetic screen layer, improves electromagnetic shielding capability, together
When be easily achieved the single thin layer of graphene, be conducive to the impact resistance for improving composite material.
Preferably, the electro-magnetic screen layer is preheated before spraying.Further it is conducive to promote the group and matrix material of graphene
The group of material generates stronger chemical bond, improves the evaporation rate of liquid in graphene suspension, and it is several to reduce droplet bounce
Rate is conducive to graphene and is adhered on electro-magnetic screen layer, forms smooth wearing layer.It is also beneficial to reduce the temperature difference, reduces graphite
The temperature difference between alkene wearing layer and electro-magnetic screen layer prevents from expanding with heat and contract with cold and leading to wear-resisting delamination layer.
Preferably, nozzle is preheating between 300 DEG C to 340 DEG C before spraying.Dynamic spraying is advantageously formed, stone is improved
The activity of black alkene, is effectively adhered on electro-magnetic screen layer conducive to graphene.
Preferably, the nozzle of spraying graphite alkene suspension is less than 5.5cm at a distance from electro-magnetic screen layer.Advantageously reduce stone
The loss of black alkene kinetic energy in course of injection is conducive between the lipophilic group of graphene and the resin group of electro-magnetic screen layer
Anchorage effect.
Preferably, flake graphite alkene is filled in the resin matrix of electro-magnetic screen layer, which is layering, staggered row
Column constitute mazy shielding framework by forming curved channel, realize labyrinth seal.Be conducive to improve electro-magnetic screen layer cause
Close property, so that its waterproof performance, effectively inhibits the infiltration, infiltration and diffusion of corrosive medium.
Shielding composite material of the invention can be used for making electronic lock, control electronics, electronics mobile communication are set
The electronic equipment shieldings layer such as standby, electronic computer, data storage, for protecting in equipment electronic component not by magnetostatic and electromagnetism
Interference, be not used as by high temperature and impact and damaged.
Graphene supersonic spray coating of the invention is not limited to use on shielding composite material, applies also for gear, spiral shell
Mother, screw rod, screw and key surface production, the system on the surfaces such as casing, the motor case of mobile devices can also be incorporated in
Make.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those of ordinary skill in the art to which the present invention belongs, exist
Several equivalent substitute or obvious modifications are made under the premise of not departing from present inventive concept, and performance or use is identical, all should
It is considered as belonging to present invention scope of patent protection determined by the appended claims.
Claims (10)
1. a kind of shielding composite material, it is characterised in that:
The composite material is disposed with insulating layer, magnetic shielding layer, electro-magnetic screen layer and wearing layer from the inside to the outside.
2. composite material according to claim 1, it is characterised in that:
The insulating layer is by glass fiber resin, quartz fibre resin, basalt fibre resin, aramid fiber resin, poly- to benzene
The composite material of at least one insulation such as support benzo dioxazole fibre resin is made.
3. shielding composite material according to claim 1, it is characterised in that:
Resin composite materials of the magnetic shielding layer by permalloy or with high magnetic conduction coating fiber are made.
4. shielding composite material according to claim 1, it is characterised in that:
The electro-magnetic screen layer includes basis material and fiber cloth；
The fiber cloth is by metallic fiber, carbon series fiber, conductive metal chemical combination fibres, conducting polymer fiber type at least one
Kind fiber is made.
5. shielding composite material according to claim 1, it is characterised in that:
Graphene is deployed on the electro-magnetic screen layer by way of spraying graphite alkene suspension and forms the wearing layer；
The spraying initial velocity of the graphene suspension is greater than 381m/s；
The graphene tool anchoring has lipophilic group.
6. shielding composite material described in the claim 5, it is characterised in that:
The graphene have methyl, ethyl, propyl, butyl, phenyl, cyclohexyl, vinyl, acrylic, amino, aminopropyl,
At least one of aminoethylaminopropyl, mercaptopropyi and anilinomethyl amido lipophilic group.
7. shielding composite material described in the claim 6, it is characterised in that:
The suspension includes at least one of methanol, ethyl alcohol, acetone, butanone and DMF liquid；
The mass ratio of the graphene and the graphene suspension is between 7% to 9.5%.
8. any shielding composite material of claim 5 to 7, it is characterised in that:
The electro-magnetic screen layer is preheated before spraying.
9. any shielding composite material of claim 5 to 7, it is characterised in that:
The nozzle is preheating between 300 DEG C to 340 DEG C before spraying.
10. any shielding composite material of claim 5 to 7, it is characterised in that:
The graphene suspension spraying is completed after electro-magnetic screen layer gel and before being fully cured.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923888 | 2018-08-11 | ||
| CN2018109238884 | 2018-08-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109910385A true CN109910385A (en) | 2019-06-21 |
Family
ID=66960805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910075358.3A Pending CN109910385A (en) | 2018-08-11 | 2019-01-25 | Composite material is used in shielding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109910385A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090163103A1 (en) * | 2007-12-20 | 2009-06-25 | Fih (Hong Kong) Limited | Multi-layered molded article with emi protection |
| CN101474897A (en) * | 2009-01-16 | 2009-07-08 | 南开大学 | Grapheme-organic material layered assembling film and preparation method thereof |
| CN108076618A (en) * | 2016-11-09 | 2018-05-25 | 安特丽屋株式会社 | Electromagnetic wave shielding electronic element packaging body and its manufacturing method |
-
2019
- 2019-01-25 CN CN201910075358.3A patent/CN109910385A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090163103A1 (en) * | 2007-12-20 | 2009-06-25 | Fih (Hong Kong) Limited | Multi-layered molded article with emi protection |
| CN101474897A (en) * | 2009-01-16 | 2009-07-08 | 南开大学 | Grapheme-organic material layered assembling film and preparation method thereof |
| CN108076618A (en) * | 2016-11-09 | 2018-05-25 | 安特丽屋株式会社 | Electromagnetic wave shielding electronic element packaging body and its manufacturing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhang et al. | Fabrication and assessment of a thin flexible surface coating made of pristine graphene for lightning strike protection | |
| US20080036241A1 (en) | Vehicle body, chassis, and braking systems manufactured from conductive loaded resin-based materials | |
| CN108136694B (en) | Prepreg material capable of providing lightning strike protection and burn-through resistance | |
| CN104039121B (en) | One kind inhales waveguide magnetic shield film and preparation method thereof | |
| US20100059243A1 (en) | Anti-electromagnetic interference material arrangement | |
| CN107825810A (en) | A kind of lightweight lightning Protection superficial layer and its preparation and application | |
| KR102310727B1 (en) | Housing for electromagnetic shielding | |
| CN102140316A (en) | Conductive adhesive film and preparation method thereof | |
| KR102178678B1 (en) | Thermal sheet comprising vertical-aligned graphene and a fabrication thereof | |
| CN109831904A (en) | High shielding emi shielding film and preparation method thereof | |
| US20110318981A1 (en) | Composite material structure protected against the effects of lightning | |
| CN103552296A (en) | Electric conducting layer for lightning protection as well as preparation method thereof | |
| US9855681B2 (en) | Ferrite compositions | |
| CN206350295U (en) | A kind of electromagnetic shielding film | |
| CN105020540A (en) | Glass fiber composite thermal insulation felt with hollow microspheres as basic core and preparation method thereof | |
| CN109910385A (en) | Composite material is used in shielding | |
| KR102225637B1 (en) | Composite material for battery pack case | |
| CN104883865A (en) | High-efficient low-cost electromagnetic shielding film and manufacturing method thereof | |
| CN208745455U (en) | A kind of unmanned plane carbon fiber composite board | |
| JPH0639930A (en) | Reinforced conductive plastic | |
| CN105799246A (en) | High-inflaming-retarding low-warping carbon fiber sheet and manufacturing process thereof | |
| Zhang et al. | Microwave absorption and bending properties of three‐dimensional gradient honeycomb woven composites | |
| CN204616270U (en) | A kind of high-effect Low-cost electric magnetic shield film | |
| CN201576464U (en) | Electromagnetic-wave shielding material for environment-friendly antenna microstructure | |
| Albert et al. | Review on recent progress in epoxy‐based composite materials for Electromagnetic Interference (EMI) shielding applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190621 |