CN106413367A - Novel multifunctional macromolecule based multilayer electromagnetic shielding material and preparation method thereof - Google Patents
Novel multifunctional macromolecule based multilayer electromagnetic shielding material and preparation method thereof Download PDFInfo
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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
- H05K9/0088—Electromagnetic shielding materials, e.g. EMI, RFI shielding comprising a plurality of shielding layers; combining different shielding material structure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/24—All layers being polymeric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/105—Metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
- B32B2264/10—Inorganic particles
- B32B2264/107—Ceramic
- B32B2264/108—Carbon, e.g. graphite particles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/212—Electromagnetic interference shielding
Abstract
The invention discloses a novel multifunctional macromolecule based multilayer electromagnetic shielding material and a preparation method thereof. The material prepared by the method is composed of a conductive function layer and a composite function layer and is subjected to melt extrusion of a multilayer extrusion system to form a multilayer structure with two alternately arranged phases. The conductive function layer is a macromolecule based conductive composite material filled with conducting particles; the composite function layer is a macromolecule based conductive composite material filled with composite function particles; and the composite function particles are formed by mixing the conductive particles and other function particles. A plenty of laminar interfaces exist in the material, and conductivity exists in the direction which is parallel with the laminar interfaces and the direction which is vertical to the laminar interfaces. The alternate multilayer material prepared by the provided preparation method is controllable in layer number, layer thickness, layer structure and performance; the formula of the raw materials is adjustable; the electromagnetic shielding performance and other composite functions are excellent; the needed raw materials are commercially available and low in cost; and the preparation method is simple, the production efficiency is high, and the continuous batch production can be realized.
Description
Technical field
The invention belongs to polymer matrix functional composite material preparation technology field is and in particular to a kind of Multifunction high score
Subbase multilamellar electromagnetic shielding material and preparation method thereof.
Background technology
With with microelectronic device, the development that the modern science and technology as representative such as is wirelessly transferred, electromagnetic wave is in the life for the mankind
Producing lives while provide convenient, day by day become impact human health, information security, equipment stablize very important " stealthy
Killer ".Electromagnetic radiation has become the another severe contamination after atmospheric pollution, water pollution.The use of shielding material is a kind of letter
Method that is single, effectively suppressing electromagnetic radiation.Compared with metal material, the polymer matrix electromagnetic shielding material of conducting particles filling
Because its light weight, plastic, anti-corrosion the advantages of, be gradually applied to the fields such as electric, instrument communication, national defense and military.But with
Every profession and trade grows with each passing day to material thin wall, lightweight requirements, proposes more harsh challenge to its capability of electromagnetic shielding.
Meanwhile, with social development, the material of simple function has been difficult to meet the demand of people, the multifunction gesture of material
The trend of social development must be become.If making it have fire-retardant several functions of Denging on the basis of there is electro-magnetic screen function, will
Greatly improve its application in protective material field.Therefore, how to design preparation and there is capability of electromagnetic shielding and excellent flame etc.
Multifunctional polymer based composites have important theory and realistic meaning.
For the polymer matrix electromagnetic shielding material of conducting particles filling, the key that will obtain excellent electromagnetic shielding propertiess exists
In how improving dispersion in polymeric matrix for the conducting particles to construct perfect conductive network, thus increase composite with
The thermal losses producing in material internal during the resistance difference of external agency and electromagnetic conversion.Multifunction to be realized, needs
Add other functions particle to be combined, and traditional blend method is difficult to the synergistic of conducting particles and other functions particle
Compound.Therefore, the key problem realizing high-efficiency multi-function under low conducting particles loading is how in polymeric matrix
Construct composite network multi-functional with synergistic effect.
Compared to single-layer shield structural material, multilayer screen structural material has at the aspect such as material selection and structure optimization
Bigger design space.By rational optimization design, introduce more bed boundarys, conducting particles divides in limited space
Dissipate, forming fine and close conductive network, making electromagnetic wave in material internal through multiple reflections, thus obtaining more preferable shield effectiveness.With
This simultaneously, the design multiple structure that is arranged alternately with complex functional layer of conductive functional layers, may be easy to regulation and control conducting particles and its
The dispersion of his functional particles, thus constructing compound multifunctional network, makes the combination property of material be greatly improved.
Content of the invention
The purpose of the present invention is the preparation present situation of the polymer matrix electromagnetic shielding material for conducting particles filling, and provides
A kind of preparation method of the polymer-based multilamellar electromagnetic shielding material of Multifunction, i.e. polymer-matrix electric conduction functional layer and polymer
The multilayer screen material that base complex functional layer is arranged alternately, to solve, existing electromagnetic shielding material shield effectiveness is poor, morphosiss
Be difficult to design, single function the problems such as.
The technical scheme is that：Thing by the material of polymer-based conductive functional layers and polymer-based complex functional layer
Material extruded machine fusion plastification extrusion respectively, and after junction station exit is superimposed together the following initiating structure of formation, then warp
If crossing the multiple stratiform overlapping effect of the dried layer multiplexer being connected with described junction station, having of formation biphase is arranged alternately multilamellar
The extrudate of structure, i.e. polymer-based multilayer materials：
(1) material of described polymer-based conductive functional layers is the polymer-based conduction composite wood particle-filled by conducting function
Material；
(2) material of described polymer-based complex functional layer is the polymer-based conduction composite wood particle-filled by complex function
Material, wherein：Described complex function particle is mixed by conducting function particle and other functional particles；
(3) described initiating structure can be formed by stacking by polymer-based conductive functional layers and polymer-based complex functional layer
Two-layer structure, or by polymer-based conductive functional layers, polymer-based complex functional layer, polymer-based conductive functional layers overlapping
Three-decker, or by polymer-based complex functional layer, polymer-based conductive functional layers, polymer-based complex function
The three-decker that layer is formed by stacking.
In technique scheme, the macromolecule matrix in described polymer-based multilamellar electromagnetic shielding material is selected from poly- second
Alkene, polypropylene, polrvinyl chloride, polymethyl methacrylate, polystyrene, Kynoar, polyamide, polyester, polyformaldehyde, poly-
Urethane, styrene analog thermoplastic elastomer, polyester-type thermoplastic elastomer, polyolefins thermoplastic elastomer, polyacrylate
One of analog thermoplastic elastomer, EP rubbers, butadiene-styrene rubber, neoprene, silicone rubber, fluorubber, natural rubber or many
Kind；Wherein, the macromolecule matrix in described polymer-based conductive functional layers and described polymer-based complex functional layer is selected from upper
State same or not of the same race in material.
In technique scheme, the conducting function particle in described polymer-based conductive functional layers is metal, white carbon black, carbon
One or more of nanotube, Graphene, carbon fiber, mass fraction is 0.01-60%.
In technique scheme, the conducting function particle in described polymer-based complex functional layer is metal, white carbon black, carbon
One or more of nanotube, Graphene, carbon fiber, other functional particles are the ball not including above-mentioned conducting function particle
One or more of shape, threadiness, lamellar, different form inorganic particulate or organic filler；Described polymer-based complex functional layer
The mass fraction of middle complex function particle is 0.01-60%, and in complex function particle, the mass fraction of conducting function particle is
0.01-99.9%.
In technique scheme, described polymer-based multilamellar electromagnetic shielding material is parallel to bed boundary direction and vertical
It is respectively provided with electric conductivity in bed boundary direction, and electrical conductivity, capability of electromagnetic shielding and other complex functions can pass through function grain
Sub- content, Thickness ratio, the number of plies, functional particles particle diameter, alternately one or more of initiating structure of stratified material mode carry out
Regulation and control.
In technique scheme, described extrudate is by two extruderses（A、B）, junction station（C）If, dried layer multiplexer
（D）, outlet mold（E）And cooling tractor（F）The multilayer extrusion system of composition is passed through to melt extrude to prepare, and its performance can
By the gross thickness of described extrudate, the thickness ratio of total number of plies, polymer-based conductive functional layers and polymer-based complex functional layer,
The loading of functional particles is regulated and controled, wherein：The gross thickness of extrudate is 0.01-10mm；Total number of plies number is 2-32769；
The thickness of described polymer-based conductive functional layers and polymer-based complex functional layer is than for 1:99-99:1.
The number of plies of described extrudate initiating structure can pass through described junction station（C）In switch runner number is adjusted
Control：The initiating structure that the initiating structure that 2 runners obtain is 2 layers, 3 runners obtain is 3 layers.
In technique scheme, the number of plies of described extrudate can by the initiating structure number of plies and layer multiplexer number according to
In the following manner is regulated and controled：
(1) when initiating structure is 2 layers, and during using n layer multiplexer, the number of plies of extrudate is 2(n+1)Layer, wherein：N is 0-
14；
(2) when initiating structure is 3 layers, and during using n layer multiplexer, the number of plies of extrudate is 2(n+1)+ 1 layer, wherein：N is
0-14.
In technique scheme, needing, according to practical application, the material being obtained is thin film, sheet material, sheet material, special section, fibre
Dimension.
The invention has the advantages that：1st, the preparation method that the present invention provides adopts the one-shot forming work of lamellar composite extrusion
Skill, its preparation method is simple, convenient operation and control, and production efficiency is high；By adjusting junction station（C）Runner number, can adjust
The initiating structure of whole how described alternate multiple material is 2 layers or 3 layers；By adjusting and controlling the extrusion rotating speed of two extruderses
Ratio can adjust polymer-based conductive functional layers and the thickness of polymer-based complex functional layer；Number by key-course multiplexer
Amount, can adjust total number of plies of described alternate multiple material.
2nd, the polymer-based multilamellar electromagnetic shielding material prepared by the present invention is polymer-based conductive functional layers and is combined
The multiple structure that functional layer is arranged alternately, this structure is perpendicular to bed boundary direction and being respectively provided with parallel to bed boundary direction leading
Electrically, the capability of electromagnetic shielding of material can be effectively improved.
3rd, the polymer-based multilamellar electromagnetic shielding material prepared by the present invention is parallel to bed boundary direction, conducting particles
It is distributed in restricted clearance, the conductive network of densification can be formed.Especially in complex functional layer, due to other functions particle
Exist, both can induce the dispersion of conducting particles, volume excretion can be played again, thus reducing conductive excess effusion value, raising
Electrical conductivity is so that multilayer screen material can realize high capability of electromagnetic shielding under low conducting particles content.
4th, multifunctionality is had by polymer-based multilamellar electromagnetic shielding material prepared by the present invention, polymer-based conduction work(
Ergosphere is arranged alternately with complex functional layer, the dispersion of reciprocal induction conducting particles and other functions particle, Effective Regulation conduction-many
Function and service network forms synergistic effect, thus obtaining high-performance Multifunctional electromagnetic shielding material.
The present invention also has some advantages otherwise.
Brief description
Fig. 1 is co-extrusion device structural representation involved in the present invention（Layer multiplication extruding technology alternate multiple is combined
The preparation of material）.In in figure, A, B:Extruder, C:Junction station, D:Layer multiplexer, E:Outlet mold, F:Traction cooling
Device, G- extrudes sample.
Specific embodiment
By the following examples the present invention is further described specifically.In following embodiment, each component
Consumption is quality consumption.Be necessary it is pointed out here that be that following examples are served only for that the present invention is described further, no
It is understood that for limiting the scope of the invention, this art skilled person do to the present invention according to the invention described above content
Go out some nonessential improvement and adjust, still fall within protection scope of the present invention.
The good effect that the present invention produces can be illustrated with embodiment.
Embodiment 1
（1）Raw material is thermoplastic polyurethane（TPU）(58A, BASF), CNT（CNT）, expansion type flame retardant（IFR）, conductive
Functional layer is carbon nano-tube filled thermoplastic polyurethane, complex functional layer is CNT and the composite filled heat of expansion type flame retardant
Plastic polyurethane.24h is dried in 80 DEG C of vacuum drying ovens and removes moisture using front be placed in raw material.Prepare conductive functional layers first
With complex functional layer master batch, by dried TPU and CNT melting mixing pelletize in double screw extruder, temperature is 185 DEG C,
Prepare the TPU/CNT complex master batch containing 6wt%CNT；Dried TPU is molten in double screw extruder with CNT, IFR
Melt mixing granulation, temperature is 185 DEG C, prepares the TPU/CNT/IFR complex master batch containing 1wt%CNT, 30wt%IFR；
（2）Conductive functional layers and complex functional layer master batch are put into respectively two extruders of multilayer extrusion system（A、B）（See figure
1）In, adjust the rotating ratio 1 of extruder:1, each section of temperature of extruder controls respectively at 175 DEG C -180 DEG C -185 DEG C -185 DEG C.Squeeze
After going out the material melts plasticizing in machine, two strands of melts are made to overlap in the junction station C of two runners, obtaining the number of plies is 2 layers initial
Flow out from the outlet mold E of rectangularl runner after structure, then the cutting through 6 layer multiplexer D and layering superposition, wherein junction station C,
The temperature of layer multiplexer D and outlet mold E is 185 DEG C about, then the traction of the compacting through tri-roll press machine and traction machine, that is,
Can get thickness 1.6mm, conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is that 128 layers of lamellar replaces stratiform again
Condensation material.Electric performance test result shows, this material is being led parallel to bed boundary direction and being respectively provided with perpendicular to bed boundary direction
Electrically, parallel to bed boundary direction electrical conductivity be 60 S/m, perpendicular to bed boundary direction electrical conductivity be 26S/m;Electromagnetic wave shielding
Can test show, X-band masking value reaches 55dB, and limited oxygen index test result shows, limited oxygen index reaches 33%.
Comparative example 1
As a comparison, in the master batch preparation of the first step, prepare the TPU/CNT complex master batch containing 6wt%CNT respectively and contain
The TPU/CNT/IFR complex master batch of 1wt%CNT, 20wt%IFR.Second step implementation is same as Example 1, finally obtains
Thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is that 128 layers of lamellar replaces stratiform composite wood
Material.Electric performance test result shows, this material is respectively provided with electric conductivity parallel to bed boundary direction and perpendicular to bed boundary direction,
It is 50S/m parallel to bed boundary direction electrical conductivity, be 20S/m perpendicular to bed boundary direction electrical conductivity；Capability of electromagnetic shielding is tested
Display, X-band masking value reaches 47dB；Limited oxygen index test result shows, limited oxygen index reaches 29%.As can be seen here, originally
Invention according to actual needs, can regulate and control the conductance of this multilayer material by the content changing functional particles in complex functional layer
Rate, electromagnetic shielding and fire resistance.
Embodiment 2
（1）Raw material is polypropylene（PP）, white carbon black（CB）, nano imvite（MMT）, conductive functional layers be carbon black filled polypropylene,
Complex functional layer is white carbon black and the composite filled polypropylene of nano imvite.It is dried using front raw material is placed in 80 DEG C of vacuum drying ovens
24h is to remove moisture.Prepare conductive functional layers and complex functional layer master batch first, by dried PP and CB in twin-screw extrusion
Melting mixing pelletize in machine, temperature is 200 DEG C, prepares the PP/CB complex master batch containing 15wt%CB；By dried PP
The melting mixing pelletize in double screw extruder with CB, MMT, temperature is 200 DEG C, prepares containing 15wt%CB, 20wt%MMT
PP/CB/MMT complex master batch；
（2）Conductive functional layers and complex functional layer master batch are put into respectively two extruders of multilayer extrusion system（A、B）（See figure
1）In, adjust the rotating ratio 1 of extruder:3, each section of temperature of extruder controls respectively at 185 DEG C -190 DEG C -200 DEG C -200 DEG C.Squeeze
After going out the material melts plasticizing in machine, two strands of melts are made to overlap in the junction station C of three runners, obtaining the number of plies is 3 layers initial
Flow out from the outlet mold E of rectangularl runner after structure, then the cutting through 8 layer multiplexer D and layering superposition, wherein junction station C,
The temperature of layer multiplexer D and outlet mold E is 200 DEG C about, then the traction of the compacting through tri-roll press machine and traction machine, that is,
Can get thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:3, the number of plies is that 513 layers of lamellar replaces stratiform
Composite.Electric performance test result shows, this material is respectively provided with parallel to bed boundary direction and perpendicular to bed boundary direction
Electric conductivity, is 10S/m parallel to bed boundary direction electrical conductivity, is 5 S/m perpendicular to bed boundary direction electrical conductivity；;Electromagnetic shielding
Performance test shows, X-band masking value reaches 35dB；Barrier property test result shows, O2Infiltration coefficient can reach 4.205*
10-15cm3·cm/cm2·s·Pa.
Comparative example 2
As a comparison, in second step, the rotating ratio of conductive functional layers and complex functional layer is adjusted to 3:1, other same embodiments
2.It is computed, material gross thickness is 1.6mm, the thickness of conductive functional layers and complex functional layer ratio is for 3:1, total number of plies is 513 layers.
Electric performance test result shows, this material is respectively provided with electric conductivity parallel to bed boundary direction and perpendicular to bed boundary direction, puts down
Row is 6 S/m in bed boundary direction electrical conductivity, is 2 S/m perpendicular to bed boundary direction electrical conductivity;Capability of electromagnetic shielding test is aobvious
Show, X-band masking value reaches 30dB；Barrier property test result shows, O2Infiltration coefficient is 8.215*10-15cm3·cm/
cm2·s·Pa.As can be seen here, the present invention can according to actual needs, by changing the layer of complex functional layer and conductive functional layers
Thickness rate is regulating and controlling electrical conductivity, electromagnetic shielding and the barrier property of this multilayer material.
Embodiment 3
（1）Raw material is polyethylene（PE）, Graphene（Gr）, expansion type flame retardant（IFR）, conductive functional layers are filled poly- for Graphene
Ethylene, complex functional layer are Graphene and the composite filled polyethylene of expansion type flame retardant.Using front, raw material is placed in 80 DEG C of vacuum
24h is dried to remove moisture in baking oven.Prepare conductive functional layers and complex functional layer master batch first, dried PE and Gr is existed
Melting mixing pelletize in double screw extruder, temperature is 200 DEG C, prepares the PE/Gr complex master batch containing 4wt%Gr；To do
PE after dry and Gr, IFR melting mixing pelletize in double screw extruder, temperature is 200 DEG C, prepare containing 4wt%Gr,
The PE/Gr/IFR complex master batch of 20wt%IFR；
（2）Conductive functional layers and complex functional layer master batch are put into respectively two extruders of multilayer extrusion system（A、B）（See figure
1）In, adjust the rotating ratio 1 of extruder:1, each section of temperature of extruder controls respectively at 170 DEG C -185 DEG C -200 DEG C -200 DEG C.Squeeze
After going out the material melts plasticizing in machine, two strands of melts are made to overlap in the junction station C of three runners, obtaining the number of plies is 3 layers initial
Flow out from the outlet mold E of rectangularl runner after structure, then the cutting through 9 layer multiplexer D and layering superposition, wherein junction station C,
The temperature of layer multiplexer D and outlet mold E is 200 DEG C about, then the traction of the compacting through tri-roll press machine and traction machine, that is,
Can get thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is 1025 layers of lamellar alternating layer
Shape composite.Electric performance test result shows, this material all has parallel to bed boundary direction and perpendicular to bed boundary direction
Conductive, it is 55 S/m parallel to bed boundary direction electrical conductivity, be 25 S/m perpendicular to bed boundary direction electrical conductivity;Electromagnetism
Shielding propertiess test display, X-band masking value reaches 45dB；Limited oxygen index test result shows, limited oxygen index reaches
30%.
Comparative example 3
As a comparison, in second step, the number of multiplexer is changed to 3, other are with embodiment 3.Obtaining thickness is 1.6mm, leads
The thickness of electric functional layer and complex functional layer is than for 1:1st, the number of plies is that 17 layers of lamellar replaces laminar composite.Electric performance test
Result shows, this material is respectively provided with electric conductivity parallel to bed boundary direction and perpendicular to bed boundary direction, parallel to bed boundary
Direction electrical conductivity is 50 S/m, is 20S/m perpendicular to bed boundary direction electrical conductivity;Capability of electromagnetic shielding test display, X-band screen
Cover value and reach 35dB；Limited oxygen index test result shows, limited oxygen index reaches 27%.As can be seen here, the present invention can basis
It is actually needed, regulate and control electrical conductivity, electromagnetic shielding and the fire resistance of this multilayer material by changing the multilayer material number of plies.
Embodiment 4
（1）Raw material is polyolefin elastomer（POE）, copper powder（Cu）, hollow glass micropearl（HGB, 60 μm of particle diameter）, conductive functional layers
For copper powder filled polyolefin elastomer, complex functional layer is copper powder and the hollow glass micropearl with sound insulation effect is composite filled poly-
Olefin elastomer.24h is dried in 80 DEG C of vacuum drying ovens and removes moisture using front be placed in raw material.Prepare conductive functional layers first
With complex functional layer master batch, by dried POE and Cu melting mixing pelletize in double screw extruder, temperature is 190 DEG C, system
The standby POE/Cu complex master batch obtaining containing 20wt% Cu；Dried POE and Cu, HGB are melted in double screw extruder
Mixing granulation, temperature is 190 DEG C, prepares the POE/Cu/ HGB complex master batch containing 10wt%Cu, 15wt% HGB；
（2）Conductive functional layers and complex functional layer master batch are put into respectively two extruders of multilayer extrusion system（A、B）（See figure
1）In, adjust the rotating ratio 1 of extruder:1, each section of temperature of extruder controls respectively at 115 DEG C -170 DEG C -185 DEG C -190 DEG C.Squeeze
After going out the material melts plasticizing in machine, two strands of melts are made to overlap in the junction station C of three runners, obtaining the number of plies is 3 layers initial
Flow out from the outlet mold E of rectangularl runner after structure, then the cutting through 7 layer multiplexer D and layering superposition, wherein junction station C,
The temperature of layer multiplexer D and outlet mold E is 190 DEG C about, then the traction of the compacting through tri-roll press machine and traction machine, that is,
Can get thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is that 257 layers of lamellar replaces stratiform
Composite.Electric performance test result shows, this material is respectively provided with parallel to bed boundary direction and perpendicular to bed boundary direction
Electric conductivity, is 20 S/m parallel to bed boundary direction electrical conductivity;It is 14 S/m perpendicular to bed boundary direction electrical conductivity;Electromagnetic screen
Cover performance test to show, X-band masking value reaches 35dB；The performance test results such as sound insulation show, at 1/3 times of 100-2500Hz
The mean transmission loss of sound interval can reach 25dB.
Comparative example 4
As a comparison, the hollow glass micropearl particle diameter selecting in embodiment 4 is changed into 20 μm, other, with embodiment 4, finally obtain
Thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is that 257 layers of lamellar replaces stratiform composite wood
Material.Electric performance test result shows, this material is respectively provided with electric conductivity parallel to bed boundary direction and perpendicular to bed boundary direction,
It is 15 S/m parallel to bed boundary direction electrical conductivity;It is 8 S/m perpendicular to bed boundary direction electrical conductivity；Capability of electromagnetic shielding is surveyed
Examination display, X-band masking value reaches 28dB；Sound insulation etc. the performance test results show, 100-2500Hz third-octave put down
All oise insulation factors can reach 23dB.As can be seen here, the present invention can according to actual needs, by changing function grain in complex functional layer
Electrical conductivity, electromagnetic shielding and sound insulation property to regulate and control this multilayer material for the particle diameter of son.
Embodiment 5
（1）Raw material is polypropylene（PP）, CNT（CNT）, nm-class boron nitride（BN）, conductive functional layers are carbon nano-tube filled
Polypropylene, complex functional layer are CNT and the composite filled polypropylene of nm-class boron nitride.Using front, raw material is placed in 80 DEG C very
24h is dried to remove moisture in empty baking oven.Prepare conductive functional layers and complex functional layer master batch first, by dried PP with
CNT melting mixing pelletize in double screw extruder, temperature is 200 DEG C, and the PP/CNT complex preparing containing 6wt%CNT is female
Grain；By dried PP and CNT, BN melting mixing pelletize in double screw extruder, temperature is 200 DEG C, prepares and contain
The PP/CNT/BN complex master batch of 1wt%CNT, 30wt%BN；
（2）Conductive functional layers and complex functional layer master batch are put into respectively two extruders of multilayer extrusion system（A、B）（See figure
1）In, adjust the rotating ratio 1 of extruder:1, each section of temperature of extruder controls respectively at 185 DEG C -190 DEG C -200 DEG C -200 DEG C.Squeeze
After going out the material melts plasticizing in machine, two strands of melts are made to overlap in the junction station C of three runners, obtaining the number of plies is 3 layers initial
Flow out from the outlet mold E of rectangularl runner after structure, then the cutting through 9 layer multiplexer D and layering superposition, wherein junction station C,
The temperature of layer multiplexer D and outlet mold E is 200 DEG C about, then the traction of the compacting through tri-roll press machine and traction machine, that is,
Can get thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies be 1025 layers complex functional layer-
The flaky composite material that conductive functional layers-complex functional layer is arranged alternately, outermost layer is complex functional layer（See Fig. 1）.Obtained
Composite have excellent capability of electromagnetic shielding and heat conductivility concurrently.Electric performance test result shows, this material parallel to
Bed boundary direction and be respectively provided with electric conductivity perpendicular to bed boundary direction, is 56 S/m parallel to bed boundary direction electrical conductivity, vertically
It is 28S/m in bed boundary direction electrical conductivity；Capability of electromagnetic shielding test display, X-band masking value reaches 57dB；Heat conductivility is surveyed
Test result shows, thermal conductivity reaches 3.0W/ (m K).
Comparative example 5
As a comparison, in second step, exchange in two extruders（A,B）The master batch of middle addition, other are with embodiment 5.I.e. final
This sheet material is arranged alternately structure for conductive functional layers-complex functional layer-conductive functional layers, and outermost layer is conductive functional layers（See figure
1）.It is computed, material gross thickness is 1.6mm, conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is 1025 layers.Electricity
The performance test results show, this material is respectively provided with electric conductivity parallel to bed boundary direction and perpendicular to bed boundary direction, parallel
It is 50 S/m in bed boundary direction electrical conductivity, be 20S/m perpendicular to bed boundary direction electrical conductivity；；Capability of electromagnetic shielding test is aobvious
Show, X-band masking value reaches 48dB；Heat conductivility test result shows, thermal conductivity reaches 3.1W/ (m K).As can be seen here, originally
Invention can according to actual needs, by change replace stratified material initiating structure regulate and control this multilayer material electrical conductivity,
Electromagnetic shielding and heat conductivility.
Embodiment 6
（1）Raw material is thermoplastic polyurethane（TPU）(58A, BASF), carbon fiber（CF）, APP（APP）, conductive functional layers
It is carbon fiber and the composite filled thermoplastic polyurethane of APP for carbon fiber filled thermoplastic's polyurethane, complex functional layer.Make
24h is dried with front raw material is placed in 80 DEG C of vacuum drying ovens to remove moisture.Prepare conductive functional layers and complex functional layer first
Master batch, by dried TPU and CF melting mixing pelletize in double screw extruder, temperature is 185 DEG C, prepares and contain
The TPU/CF complex master batch of 10wt%CF；By dried TPU and CF, APP melting mixing pelletize in double screw extruder,
Temperature is 185 DEG C, prepares the TPU/CF/APP complex master batch containing 5wt%CF, 20wt%APP；
（2）Conductive functional layers and complex functional layer master batch are put into respectively two extruders of multilayer extrusion system（A、B）（See figure
1）In, adjust the rotating ratio 1 of extruder:1, each section of temperature of extruder controls respectively at 175 DEG C -180 DEG C -185 DEG C -185 DEG C.Squeeze
After going out the material melts plasticizing in machine, two strands of melts are made to overlap in the junction station C of two runners, obtaining the number of plies is 2 layers initial
From rectangularl runner after structure, then the cutting through 6 layer multiplexer D and layering superposition, outlet mold E in flow out, wherein junction station
C, the temperature of layer multiplexer D and outlet mold E are 185 DEG C about, then the traction of the compacting through tri-roll press machine and traction machine,
Can get thickness is 1.6mm, and conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is 128 layers of lamellar alternating layer
Shape composite.
Comparative example 6-1
As a comparison, embodiment 6 second step middle outlet mould E thickness is changed into 0.2mm, other are with embodiment 6.Finally obtain thickness
For 0.2 mm, conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is 128 layers of alternately stratiform electromagnetic wave shield film.
As can be seen here, the present invention can prepare the electromagnetism with different-thickness by changing the thickness of outlet mold according to actual needs
Shielding material.
Comparative example 6-2
As a comparison, embodiment 6 second step middle outlet mould E is changed to the porous outlet mold for 0.1mm with internal diameter, other are with real
Apply example 6.Finally obtain a diameter of 0.1 mm, conductive functional layers and complex functional layer Thickness ratio are 1:1, the number of plies is 128 layers of friendship
For Fiber Laminated.As can be seen here, the present invention can be prepared with electromagnetism by the shape changing outlet mold according to actual needs
The fibrous material of shielding propertiess.
Claims (9)
1. polymer-based multilamellar electromagnetic shielding material of a kind of Multifunction and preparation method thereof is it is characterised in that described macromolecule
Quito layer electromagnetic shielding material is the material of material by following polymer-based conductive functional layers and polymer-based complex functional layer
Extruded machine fusion plastification extrusion respectively, and after junction station exit is superimposed together the following initiating structure of formation, then pass through
If the multiple stratiform overlapping effect of the dried layer multiplexer being connected with described junction station, the biphase multilamellar that is arranged alternately that has of formation is tied
The extrudate of structure：
(1) material of described polymer-based conductive functional layers is the polymer-based conduction composite wood particle-filled by conducting function
Material；
(2) material of described polymer-based complex functional layer is the polymer-based conduction composite wood particle-filled by complex function
Material, wherein：Described complex function particle is mixed by conducting function particle and other functional particles；
(3) described initiating structure can be formed by stacking by polymer-based conductive functional layers and polymer-based complex functional layer
Two-layer structure, or by polymer-based conductive functional layers, polymer-based complex functional layer, polymer-based conductive functional layers overlapping
Three-decker, or by polymer-based complex functional layer, polymer-based conductive functional layers, polymer-based complex function
The three-decker that layer is formed by stacking.
2. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that the macromolecule matrix in described polymer-based multilamellar electromagnetic shielding material is selected from polyethylene, polypropylene, polychlorostyrene
Ethylene, polymethyl methacrylate, polystyrene, Kynoar, polyamide, polyester, polyformaldehyde, polyurethane, phenylethylene
Thermoplastic elastomer (TPE), polyester-type thermoplastic elastomer, polyolefins thermoplastic elastomer, polyacrylate thermoplastic elastic
One or more of body, EP rubbers, butadiene-styrene rubber, neoprene, silicone rubber, fluorubber, natural rubber；Wherein, described
Macromolecule matrix in polymer-based conductive functional layers and described polymer-based complex functional layer is same in above-mentioned material
A kind of or not of the same race.
3. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that conducting function particle in described polymer-based conductive functional layers be metal, white carbon black, CNT, Graphene,
One or more of carbon fiber, mass fraction is 0.01-60%.
4. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that conducting function particle in described polymer-based complex functional layer be metal, white carbon black, CNT, Graphene,
One or more of carbon fiber, other functional particles be do not include above-mentioned conducting function particle spherical, fibrous, lamellar,
One or more of different form inorganic particulate or organic filler；Complex function particle in described polymer-based complex functional layer
Mass fraction is 0.01-60%, and in complex function particle, the mass fraction of conducting function particle is 0.01-99.9%.
5. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that described polymer-based multilamellar electromagnetic shielding material is parallel to bed boundary direction and equal perpendicular to bed boundary direction
There is electrical conductance, and electrical conductivity, capability of electromagnetic shielding and other complex functions can by functional particles content, Thickness ratio,
The number of plies, functional particles particle diameter, alternately one or more of initiating structure of stratified material mode regulated and controled.
6. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that described extrudate is by two extruderses（A、B）, junction station（C）If, dried layer multiplexer（D）, outlet mold（E）With
Cooling tractor（F）The multilayer extrusion system of composition is passed through to melt extrude to prepare, and its performance can pass through described extrudate
Gross thickness, the thickness ratio of total number of plies, polymer-based conductive functional layers and polymer-based complex functional layer, the filling of functional particles
Amount is regulated and controled, wherein：The gross thickness of extrudate is 0.01-10mm；Total number of plies number is 2-32769；Described polymer-based lead
The thickness of electric functional layer and polymer-based complex functional layer is than for 1:99-99:1.
7. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that the number of plies of described extrudate initiating structure can pass through described junction station（C）In switch runner number is carried out
Regulation and control：The initiating structure that the initiating structure that 2 runners obtain is 2 layers, 3 runners obtain is 3 layers.
8. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that the number of plies of described extrudate can be adjusted in such a way by the initiating structure number of plies and layer multiplexer number
Control：
(1) when initiating structure is 2 layers, and during using n layer multiplexer, the number of plies of extrudate is 2(n+1)Layer, wherein：N is 0-
14；
(2) when initiating structure is 3 layers, and during using n layer multiplexer, the number of plies of extrudate is 2(n+1)+ 1 layer, wherein：N is 0-
14.
9. according to a kind of Multifunction polymer-based multilamellar electromagnetic shielding material described in claim 1 and preparation method thereof,
It is characterized in that needing, according to practical application, the material being obtained is thin film, sheet material, sheet material, special section, fiber.
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101032198A (en) * | 2004-09-29 | 2007-09-05 | 新田株式会社 | Electromagnetic wave absorber |
| CN101214722A (en) * | 2007-12-28 | 2008-07-09 | 四川大学 | Method for preparing designable layered polymer base conductive composite material |
| CN102555375A (en) * | 2011-12-29 | 2012-07-11 | 四川大学 | Novel polymer-based electromagnetic shielding film or sheet and preparation method thereof |
| CN102837430A (en) * | 2012-07-11 | 2012-12-26 | 四川大学 | Preparation method of designable polymer-based conductive composite material |
| CN103336098A (en) * | 2013-07-15 | 2013-10-02 | 四川大学 | Method for forecasting effective action range of functional particles on polymer matrix |
| CN103333394A (en) * | 2013-07-15 | 2013-10-02 | 四川大学 | Preparation method capable of designing polymer matrix functional film |
| CN103342027A (en) * | 2013-07-15 | 2013-10-09 | 四川大学 | Preparation method of contrivable polymer-based multi-layer dielectric composite material |
| CN103481393A (en) * | 2013-09-06 | 2014-01-01 | 四川大学 | Polymer material with continuously-alternating layer structure and preparation method for same |
| TW201615390A (en) * | 2014-09-22 | 2016-05-01 | 塞特工業公司 | Composite materials with high Z-direction electrical conductivity |
| CN105538647A (en) * | 2015-07-13 | 2016-05-04 | 四川大学 | Low-cost multifunctional high-efficiency polymer-based insulation and heat conduction composite material and preparation method thereof |
-
2016
- 2016-09-05 CN CN201610801400.1A patent/CN106413367B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101032198A (en) * | 2004-09-29 | 2007-09-05 | 新田株式会社 | Electromagnetic wave absorber |
| CN101214722A (en) * | 2007-12-28 | 2008-07-09 | 四川大学 | Method for preparing designable layered polymer base conductive composite material |
| CN102555375A (en) * | 2011-12-29 | 2012-07-11 | 四川大学 | Novel polymer-based electromagnetic shielding film or sheet and preparation method thereof |
| CN102837430A (en) * | 2012-07-11 | 2012-12-26 | 四川大学 | Preparation method of designable polymer-based conductive composite material |
| CN103336098A (en) * | 2013-07-15 | 2013-10-02 | 四川大学 | Method for forecasting effective action range of functional particles on polymer matrix |
| CN103333394A (en) * | 2013-07-15 | 2013-10-02 | 四川大学 | Preparation method capable of designing polymer matrix functional film |
| CN103342027A (en) * | 2013-07-15 | 2013-10-09 | 四川大学 | Preparation method of contrivable polymer-based multi-layer dielectric composite material |
| CN103481393A (en) * | 2013-09-06 | 2014-01-01 | 四川大学 | Polymer material with continuously-alternating layer structure and preparation method for same |
| TW201615390A (en) * | 2014-09-22 | 2016-05-01 | 塞特工業公司 | Composite materials with high Z-direction electrical conductivity |
| CN105538647A (en) * | 2015-07-13 | 2016-05-04 | 四川大学 | Low-cost multifunctional high-efficiency polymer-based insulation and heat conduction composite material and preparation method thereof |
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107234794A (en) * | 2017-06-02 | 2017-10-10 | 四川大学 | A kind of preparation method of multi-functional neutron current shielding composite |
| CN107234794B (en) * | 2017-06-02 | 2019-07-26 | 四川大学 | A kind of preparation method of multi-functional neutron current shielding composite |
| CN107189157B (en) * | 2017-06-02 | 2019-12-20 | 四川大学 | Preparation method of efficient neutron flow shielding composite material |
| CN107189157A (en) * | 2017-06-02 | 2017-09-22 | 四川大学 | A kind of preparation method of efficient neutron current shielding composite |
| CN109664562A (en) * | 2017-10-13 | 2019-04-23 | 苏州上品嘉新材料科技有限公司 | Polymer-based multilayer foamed composite damping material of one kind and preparation method thereof |
| CN108215385A (en) * | 2018-01-31 | 2018-06-29 | 华南理工大学 | A kind of electromagnetic wave shield film of high-absorbable energy and preparation method thereof |
| CN108943921A (en) * | 2018-07-20 | 2018-12-07 | 四川大学 | A kind of multilayer insulation thermal interfacial material and preparation method thereof |
| CN109233100A (en) * | 2018-09-07 | 2019-01-18 | 安徽华网电缆有限公司 | A kind of special plastic substitution shielding material and its manufacturing method |
| CN110028742A (en) * | 2018-11-15 | 2019-07-19 | 许文强 | A kind of preparation method of the electromagnetic shielding material composite modified based on boron nitride nanosheet/carbon fiber |
| CN110418560B (en) * | 2019-06-10 | 2020-10-23 | 江西蓝海芯科技集团有限公司 | Graphene-based electromagnetic shielding adhesive tape and preparation method thereof |
| CN110418560A (en) * | 2019-06-10 | 2019-11-05 | 江西蓝海芯科技集团有限公司 | A kind of graphene-based electromagnetic shielding adhesive tape and preparation method thereof |
| CN114080424A (en) * | 2019-07-04 | 2022-02-22 | 科德宝两合公司 | Method for producing a component for shielding electromagnetic radiation |
| KR20220011739A (en) * | 2019-07-04 | 2022-01-28 | 칼 프로이덴베르크 카게 | Method for manufacturing parts shielded against electromagnetic radiation |
| KR102616163B1 (en) * | 2019-07-04 | 2023-12-19 | 칼 프로이덴베르크 카게 | Method for manufacturing components shielded against electromagnetic radiation |
| CN110628101B (en) * | 2019-09-05 | 2021-07-13 | 四川大学 | Bionic shell-shaped graphene/styrene butadiene rubber composite electric heating material and preparation method thereof |
| CN110628101A (en) * | 2019-09-05 | 2019-12-31 | 四川大学 | Bionic shell-shaped graphene/styrene butadiene rubber composite electric heating material and preparation method thereof |
| CN111590987A (en) * | 2020-05-30 | 2020-08-28 | 郑州大学 | Three-layer electromagnetic shielding material and preparation method thereof |
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