CN105599392B - Glued board with Electro Magnetic Compatibility and preparation method thereof - Google Patents
Glued board with Electro Magnetic Compatibility and preparation method thereof Download PDFInfo
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- CN105599392B CN105599392B CN201610036623.3A CN201610036623A CN105599392B CN 105599392 B CN105599392 B CN 105599392B CN 201610036623 A CN201610036623 A CN 201610036623A CN 105599392 B CN105599392 B CN 105599392B
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
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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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/10—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
-
- 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
- B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
- B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
-
- 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
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/08—Coating on the layer surface on wood layer
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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
- B32B2255/00—Coating on the layer surface
- B32B2255/20—Inorganic coating
-
- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
-
- 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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Building Environments (AREA)
Abstract
The invention discloses a kind of glued board with electromagnetic compatibility function, including：Sandwich unit, it includes sandwich layer and plank top layer, and the top and bottom that the plank top layer is located at sandwich layer clamp the sandwich layer, the electromagnetic wave absorbing layer that the sandwich layer is formed for brushing after nickel-zinc ferrite expanded graphite and isocyanates mixing on the top layer；Aluminium foil layer, it is arbitrarily bonded in the upper and lower surface of the sandwich unit, forms reflection of electromagnetic wave layer；Mixed layer, it is upper surface or lower surface and, the composition electromagnetic wave impedance matching layer relative with the aluminium foil layer that the sandwich unit is bonded in after titanium dioxide, silica and polyurethane mix.The present invention has mixed layer, sandwich unit and aluminium foil layer, electromagnetic wave can be absorbed and be shielded.The present invention sets the sandwich layer that nickel-zinc ferrite expanded graphite is formed in sandwich unit, improves the absorbability of wide band electromagnetic wave.
Description
Technical field
The present invention relates to wood-based plate field, it is more particularly related to a kind of gluing with Electro Magnetic Compatibility
Plate and preparation method thereof.
Background technology
With the rapid development of science and technology, various electronic apparatus largely use, and electromagnetic interference and electromagnetic radiation pollution are
As a kind of environmental hazard.Using the reflection of electromagnetic compatibility material and electromagnetic wave absorption, these harm can be reduced.Because timber is
It is unique renewable in four big material of the world today (steel, cement, timber and plastics), can natural degradation living resources, wooden base
Electromagnetic shielding material turns into one of focus direction paid close attention to now, Zhao Guangjie and Li Jian seminars successively plate to wood surface
Ni, plating Cu or plating Ni-Cu-P ternary alloy three-partalloys, there is good effectiveness.Fu Feng, Liu Yixing, Zhang Xianquan et al. are artificial
Wire netting is filled in plate, Su Chuwang, Yuan Quan equality have carried out the research of nickel-coated carbon fibers and the research of miberal powder and stainless steel cloth.
The characteristics of current wooden base electromagnetic screen material has oneself, but also have limitation, such as filling density metal is big, construction is complicated,
The hard more difficult shaping of quality, surface chemical metal plating are concentrated on reflection-type wooden electromagnetic screen material, iing is required that low reflection is high
The occasion of absorption is restricted.Therefore, studying light, soft, wideband electromagnetic compatibility composite has stronger reality
Application value.Expanded graphite density is small, matter is soft, heat endurance and chemical stability are good, and itself and Wood Fiber Composite will have
Extraordinary application potential.However, because graphite is diamagnetic in itself, low-frequency range electromagnet shield effect is relatively low, first
Must be particle loaded into expanded graphite by magnetic metal, the relation of regulation matching composite electrical property and magnetic property, obtain
The excellent material of wide frequency range electromagnet shield effect.EG has layer structure, and interlayer is linked with Van der Waals force, is total in layer with C-C
Valence link links, and this structure allows intercalation thing to enter graphite interbed without destroying the hexgonal net structure in layer.So can be with
The ability of electromagnetic wave wideband absorption is improved by way of inserting magnetic material.Ferrite has higher magnetic conductivity and dielectricity
Can, soft magnetic ferrite therein has the features such as eddy-current loss is small, and cost is low, and resistivity is big, and in high frequency light current field, application is wide
It is general, it is the excellent material of capability of electromagnetic shielding, and be advantageous to improve the wave of material and widen it to absorb frequency range.It is more important
, nanometer phase and the compound magnetic nano-particle that is also prevented from of polymer of magnetic loss function admirable are reunited.Therefore, it is utilized
Respective premium properties and it is compound caused by cooperative effect can greatly improve the absorbing property of compound.Based on above-mentioned
Contemplate, the nickel-zinc ferrite (Ni of the invention by magnetic loss typexZn1-xFe2O4) conductive component EG interlayer is incorporated into, prepare
NixZn1-xFe2O4/ EG composites, make electromagnetic compatibility glued board, in the hope of obtain it is a kind of have lightweight, softness, good flame resistance,
The electromagnetic compatibility glued board that wideband is shielded and absorbed.
The content of the invention
It is an object of the invention to solve at least the above defect, and provide the advantages of at least will be described later.
It is a still further object of the present invention to provide a kind of glued board with Electro Magnetic Compatibility, and it has mixed layer, folder
Heart unit and aluminium foil layer, electromagnetic wave can be absorbed and be shielded.
A further object of the invention is that the sandwich layer that nickel-zinc ferrite expanded graphite is formed is set in sandwich unit, is improved
The absorbability of wide band electromagnetic wave.
It is a still further object of the present invention to provide a kind of preparation method of the glued board with Electro Magnetic Compatibility, and it will be mixed
Close layer, sandwich unit and aluminium foil layer to press to form glued board, mitigate weight, improve electromagnetic shielding and absorbent properties.
In order to realize that the present invention, which provides one kind, has electromagnetic compatibility function according to object of the present invention and further advantage
Glued board, wherein, including：
Sandwich unit, it includes sandwich layer and plank top layer, and the plank top layer is located at the top and bottom of sandwich layer by the sandwich layer
Clamping, the electromagnetic wave that the sandwich layer is formed for brushing after nickel-zinc ferrite expanded graphite and isocyanates mixing on the top layer
Absorbed layer；
Aluminium foil layer, it is arbitrarily bonded in the upper and lower surface of the sandwich unit, forms reflection of electromagnetic wave layer；
Mixed layer, it is the upper surface that the sandwich unit is bonded in after titanium dioxide, silica and polyurethane mix
Or lower surface and, composition electromagnetic wave impedance matching layer relative with the aluminium foil layer.
Preferably, in the described glued board with electromagnetic compatibility function, the sandwich unit is arranged to 1-5 layers.
Preferably, in the described glued board with electromagnetic compatibility function, nickel-zinc ferrite expanded graphite preparation method
Including：
Step 1: a certain amount of six water nickel nitrate, zinc nitrate hexahydrate and nine water ferric nitrates are weighed, wherein, nickel ion and zinc
The mol ratio of ion is 1: 9-9: 1, and the summation of nickel zinc ion and the mol ratio of iron ion are 1: 2；
Step 2: a certain amount of citric acid is weighed, wherein, mole of the nickel zinc iron ion summation and citrate ion
Than 1: 1-1.5；
Step 3: the six water nickel nitrate, zinc nitrate hexahydrate, nine water ferric nitrates and citric acid and distilled water are mixed
To being completely dissolved, it is 8-9 to reuse ammoniacal liquor regulation pH value, after adding a certain amount of expanded graphite, in 89-91 DEG C of water-bath
Stirring to solution becomes gel, wherein, the quality of the expanded graphite of addition is the 15-45 of the amount of the nine water nitric acid iron substance
Times；
Step 4: gained gel is put in micro-wave oven, being fired to nature with the high fire of 650-700w power extinguishes, and produces
To described nickel-zinc ferrite expanded graphite.
Preferably, in the described glued board with electromagnetic compatibility function, the nickel-zinc ferrite expanded graphite and different
The mass ratio of cyanate is 88: 12~92: 8.
Preferably, in the described glued board with electromagnetic compatibility function, the matter of the titanium dioxide and silica
Amount is than being 1: 1-1: 3.
Preferably, in the described glued board with electromagnetic compatibility function, the titanium dioxide and silica it is total
The ratio of quality and polyurethane quality is 7: 3-9: 1.
Preferably, in the described glued board with electromagnetic compatibility function, the thickness of the glued board is 5-8mm.
A kind of preparation method of the glued board with electromagnetic compatibility function, wherein, including：
Step 1: aluminium foil layer and mixed layer are superimposed upon what the upper and lower surface of sandwich unit was paved respectively
Battenboard；
Step 2: the filled board pre-molding that gained paves is obtained into precompressed battenboard, the wherein temperature of precompressed is 20-
30 DEG C, time 10-15min, pressure 2-3Mpa；
Step 3: the glued board of the electromagnetic compatibility function is obtained by the precompressed battenboard of gained is hot-forming, wherein, institute
The temperature for stating hot pressing is 155-165 DEG C, time 9-11min, pressure 7-9Mpa.
The present invention comprises at least following beneficial effect：First, the present invention is provided with mixed layer, sandwich unit and aluminium foil layer,
Mixed layer can carry out impedance matching to electromagnetic wave, make electromagnetic wave as much as possible by mixed layer, and then by sandwich elementary layer
Absorb, last aluminium foil layer reaches the effect of electromagnetic wave shielding to ELECTROMAGNETIC REFLECTION.According to test, glued board electromagnetic screen of the present invention
Cover efficiency and reach more than 51dB in the range of 0.3~18GHz, the reflectance factor of composite is small in the range of 2GHz~18GHz
In -10dB frequency range 3.05GHz.
Secondly, mixed layer of the invention is mixed to form impedance matching layer using titanium dioxide, silica and polyurethane, should
Mixed layer is minimum to the reflectivity of electromagnetic wave, and electromagnetic wave can absorb to great extent by means of mixed layer, and then by sandwich unit,
And polyurethane strengthens the bond strength between mixed layer and sandwich unit, the mechanical property of glued board is improved.
Again, sandwich unit of the invention includes sandwich layer and plank top layer, sandwich layer by nickel-zinc ferrite expanded graphite and
Isocyanates is mixed to form, and nickel-zinc ferrite expanded graphite can be good to the effective absorption of electromagnetic wave, isocyanic acid adhesive property
And it is cheap, plank top layer can ensure the mechanical strength of glued board well, overcome traditional wooden base electro-magnetic screen material
The defects of material filling density metal is big, construction is complicated, quality hard more difficult shaping, solves surface chemical metal plating and concentrates on instead
On emitting wooden electromagnetic screen material, the problem of low occasion for reflecting high-selenium corn is restricted is being required.
Finally, the present invention is by the use of aluminium foil layer as electro-magnetic screen layer, can thoroughly prevent electromagnetic wave by improving electricity
The shield effectiveness of magnetic wave.
Further advantage, target and the feature of the present invention embodies part by following explanation, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Brief description of the drawings
Fig. 1 is the structural representation of the glued board of electromagnetic compatibility function of the present invention.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
As shown in figure 1, glued board of the present invention includes, sandwich unit, it includes sandwich layer 3 and plank top layer 2, the wood
The top and bottom that plate top layer 2 is located at sandwich layer clamp the sandwich layer 3, and the sandwich layer 3 is nickel-zinc ferrite expanded graphite and isocyanic acid
The electromagnetic wave absorbing layer formed on the top layer 2 is brushed after ester mixing；Aluminium foil layer 4, it is arbitrarily bonded in the sandwich unit
Upper and lower surface, form reflection of electromagnetic wave layer；Mixed layer 1, it is to be bonded in after titanium dioxide, silica and polyurethane mix
The upper surface or lower surface of the sandwich unit and, composition electromagnetic wave impedance matching layer relative with the aluminium foil layer 4.
Embodiment 1
Step 1: the preparation of mixed layer：By TiO2/SiO2The veneer plate surface of/polyurethane coating coated in thickness for 1mm,
As matching layer, coating thickness 1.2mm.
Step 2: EG (expanded graphite) preparation：Crystalline flake graphite 30.0g is weighed first to be put in 2L round-bottomed flasks, is added
Nitric acid 40ml, phosphoric acid 80ml, 6g potassium permanganate, are stirred 60 minutes at normal temperatures using agitating paddle, and filtration drying obtains being acidified stone
Ink.It is 50g to weigh dried acidifying graphite quality, is put into 2L round-bottomed flasks, adds acetic acid 250ml, nitric acid 75ml, Gao Meng
Sour potassium 7.5g, is stirred 60 minutes at normal temperatures using agitating paddle, is filtered, is dried to obtain acidifying graphite.Acidifying is finally aoxidized into stone
Ink, which is put into micro-wave oven to be heated 1 minute with high fire, can obtain EG of the expansion multiplying power more than 200 times.
Step 3: NixZn1-xFe2O4/ EG preparation：Six water nickel nitrate 10g, zinc nitrate hexahydrate 40.91g, nine are weighed first
Water ferric nitrate 138.89g, Citric Acid Mono 84.09g are dissolved in a small amount of distilled water together, the use of ammoniacal liquor regulation pH value of solution are 8；So
Add 4.50gEG in the solution afterwards, put it into stirring in 90 DEG C of distilled water until solution turns into xerogel；Finally will be dry solidifying
Glue is put in micro-wave oven using high fire calcining until combustion reaction terminates, and obtains Ni0.2Zn0.8Fe2O4It is 2: 3 with EG mass ratioes
Ni0.2Zn0.8Fe2O4/ EG composites.
Step 4: the preparation of sandwich unit：By gained Ni0.2Zn0.8Fe2O4/ EG composites, apply 10% isocyanic acid
Ester adhesive and 2% titanate coupling agent, it is well mixed, Ni is made0.2Zn0.8Fe2O4/ EG/ isocyanate coatings, coated in thickness
The veneer upper and lower faces for 1mm are spent, coating thickness is to obtain sandwich unit per face 1.2mm.
Step 5: the preparation of aluminium foil layer：Aluminum foil plate is pasted onto the veneer bottom surface that thickness is 1mm, thickness 0.5mm.
Step 6: the matching layer of gained, sandwich unit and aluminium foil layer are passed through into precompressed and hot pressing in the way of lamination
It is standby go out the glued board with Electro Magnetic Compatibility.
Step 7: performance test：The electromagnet shield effect of glued board through test gained reaches in the range of 0.3~18GHz
To more than 51dB, the reflectance factor of composite is less than -10dB frequency range 3.05GHz in the range of 2GHz~18GHz.
Embodiment 2
Step 1: the preparation of mixed layer：By TiO2/SiO2The veneer plate surface of/polyurethane coating coated in thickness for 1mm,
As matching layer, coating thickness 1.0mm.
Step 2: EG (expanded graphite) preparation：Crystalline flake graphite 30.0g is weighed first to be put in 2L round-bottomed flasks, is added
Nitric acid 40ml, phosphoric acid 80ml, 6g potassium permanganate, are stirred 60 minutes at normal temperatures using agitating paddle, and filtration drying obtains being acidified stone
Ink.It is 50g to weigh dried acidifying graphite quality, is put into 2L round-bottomed flasks, adds acetic acid 250ml, nitric acid 75ml, Gao Meng
Sour potassium 7.5g, is stirred 60 minutes at normal temperatures using agitating paddle, is filtered, is dried to obtain acidifying graphite.Acidifying is finally aoxidized into stone
Ink, which is put into micro-wave oven to be heated 1 minute with high fire, can obtain EG of the expansion multiplying power more than 200 times.
Step 3: NixZn1-xFe2O4/ EG preparation：Six water nickel nitrate 10g, zinc nitrate hexahydrate 15.36g, nine are weighed first
Water ferric nitrate 89.63g, Citric Acid Mono 44.10g are dissolved in a small amount of distilled water together, the use of ammoniacal liquor regulation pH value of solution are 8；So
Add 5.15gEG in the solution afterwards, put it into stirring in 90 DEG C of distilled water until solution turns into xerogel；Finally will be dry solidifying
Glue is put in micro-wave oven using high fire calcining until combustion reaction terminates, and obtains Ni0.4Zn0.6Fe2O4It is 3: 2 with EG mass ratioes
Ni0.4Zn0.6Fe2O4/ EG composites.
Step 4: the preparation of sandwich unit：By Ni obtained by (3)0.4Zn0.6Fe2O4/ EG composites, apply 10% isocyanide
Acid esters adhesive and 2% titanate coupling agent, it is well mixed, Ni is made0.4Zn0.6Fe2O4/ EG/ isocyanate coatings, are coated in
Thickness is 0.8mm veneer upper and lower faces, and coating thickness is per face 0.9mm.
Step 5: the preparation of aluminium foil layer：Aluminum foil plate is pasted onto the veneer bottom surface that thickness is 1mm, thickness 0.5mm.
Step 6: the matching layer of gained, sandwich unit and aluminium foil layer are prepared into electricity in the way of lamination by hot pressing
Magnetic compatibility glued board.
Step 7: performance test：The electromagnet shield effect of glued board through test gained reaches in the range of 0.3~18GHz
To more than 53dB, the reflectance factor of composite is less than -10dB frequency range 3.2GH in the range of 2GHz~18GHz.
Embodiment 3
Step 1: the preparation of mixed layer：By TiO2/SiO2The veneer plate surface of/polyurethane coating coated in thickness for 1mm,
As matching layer, coating thickness 1.5mm.
Step 2: EG (expanded graphite) preparation：Crystalline flake graphite 30.0g is weighed first to be put in 2L round-bottomed flasks, is added
Nitric acid 40ml, phosphoric acid 80ml, 6g potassium permanganate, are stirred 60 minutes at normal temperatures using agitating paddle, and filtration drying obtains being acidified stone
Ink.It is 50g to weigh dried acidifying graphite quality, is put into 2L round-bottomed flasks, adds acetic acid 250ml, nitric acid 75ml, Gao Meng
Sour potassium 7.5g, is stirred 60 minutes at normal temperatures using agitating paddle, is filtered, is dried to obtain acidifying graphite.Acidifying is finally aoxidized into stone
Ink, which is put into micro-wave oven to be heated 1 minute with high fire, can obtain EG of the expansion multiplying power more than 200 times.
Step 3: NixZn1-xFe2O4/ EG preparation：Six water nickel nitrate 10g, zinc nitrate hexahydrate 6.8g, nine water are weighed first
Ferric nitrate 46.19g, Citric Acid Mono 29.18g are dissolved in a small amount of distilled water together, the use of ammoniacal liquor regulation pH value of solution are 8；Then
5.85gEG is added in the solution, puts it into stirring in 90 DEG C of distilled water until solution turns into xerogel；Finally by xerogel
It is put in micro-wave oven using high fire calcining until combustion reaction terminates, obtains Ni0.6Zn0.4Fe2O4It is 3: 2 with EG mass ratioes
Ni0.6Zn0.4Fe2O4/ EG composite.
Step 4: the preparation of sandwich unit：By gained Ni0.6Zn0.4Fe2O4/ EG composites, apply 10% isocyanic acid
Ester adhesive and 2% titanate coupling agent, it is well mixed, Ni is made0.6Zn0.4Fe2O4/ EG/ isocyanate coatings, coated in thickness
The veneer upper and lower faces for 0.8mm are spent, coating thickness is per face 0.6mm.
Step 5: the preparation of aluminium foil layer：It is that 0.5mm aluminum foil plates are pasted onto veneer bottom surface by thickness.
Step 6: the matching layer of gained, sandwich unit and aluminium foil layer are prepared into electricity in the way of lamination by hot pressing
Magnetic compatibility glued board.
Step 7: performance test：The electromagnet shield effect of glued board through test gained reaches in the range of 0.3~18GHz
To more than 55dB, the reflectance factor of composite is less than -10dB frequency range 3.5GH in the range of 2GHz~18GHz.
Although embodiment of the present invention is disclosed as above, it is not restricted in specification and embodiment listed
With.It can be applied to various suitable the field of the invention completely., can be easily for those skilled in the art
Realize other modification.Therefore it is of the invention and unlimited under the universal limited without departing substantially from claim and equivalency range
In specific details and shown here as the legend with description.
Claims (5)
1. a kind of glued board with electromagnetic compatibility function, wherein, including：
Sandwich unit, it includes sandwich layer and plank top layer, and the top and bottom that the plank top layer is located at sandwich layer clamp the sandwich layer,
The electromagnetic wave that the sandwich layer is formed for brushing after nickel-zinc ferrite expanded graphite and isocyanates mixing on the plank top layer
Absorbed layer；
Aluminium foil layer, it is arbitrarily bonded in the upper and lower surface of the sandwich unit, forms reflection of electromagnetic wave layer；
Mixed layer, its be titanium dioxide, silica and polyurethane mixing after be bonded in the sandwich unit upper surface or
Lower surface and, composition electromagnetic wave impedance matching layer relative with the aluminium foil layer；The mass ratio of the titanium dioxide and silica
For 1:1-1:3；The gross mass of the titanium dioxide and silica is 7 with the ratio of polyurethane quality:3-9:1.
2. there is the glued board of electromagnetic compatibility function as claimed in claim 1, wherein, nickel-zinc ferrite expanded graphite preparation side
Method includes：
Step 1: a certain amount of six water nickel nitrate, zinc nitrate hexahydrate and nine water ferric nitrates are weighed, wherein, nickel ion and zinc ion
Mol ratio be 1：9-9：1, the summation of nickel zinc ion and the mol ratio of iron ion are 1：2；
Step 2: a certain amount of citric acid is weighed, wherein, the mol ratio 1 of the nickel zinc iron ion summation and citrate ion：
1-1.5；
Step 3: the six water nickel nitrate, zinc nitrate hexahydrate, nine water ferric nitrates and citric acid and distilled water are mixed to
Fully dissolved, it is 8-9 to reuse ammoniacal liquor regulation pH value, after adding a certain amount of expanded graphite, is stirred in 89-91 DEG C of water-bath
Become gel to solution, wherein, the quality of the expanded graphite of addition is 15-45 times of the nine water ferric nitrate；
Step 4: gained gel is put in micro-wave oven, being fired to nature with the high fire of 650-700w power extinguishes, that is, obtains institute
The nickel-zinc ferrite expanded graphite stated.
3. as claimed in claim 2 have electromagnetic compatibility function glued board, wherein, the nickel-zinc ferrite expanded graphite and
The mass ratio of isocyanates is 88:12~92:8.
4. there is the glued board of electromagnetic compatibility function as claimed in claim 1, wherein, the thickness of the glued board is 5-8mm.
5. a kind of preparation method of the glued board as claimed in claim 1 with electromagnetic compatibility function, wherein, including：
Step 1: aluminium foil layer and mixed layer are superimposed upon the sandwich that the upper and lower surface of sandwich unit paved respectively
Plate；
Step 2: the battenboard pre-molding that gained paves is obtained into precompressed battenboard, the wherein temperature of precompressed is 20-30
DEG C, time 10-15min, pressure 2-3Mpa；
Step 3: the glued board of the electromagnetic compatibility function is obtained by the precompressed battenboard of gained is hot-forming, wherein, the heat
The temperature of pressure is 155-165 DEG C, time 9-11min, pressure 7-9MPa.
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| CN201610036623.3A CN105599392B (en) | 2016-01-20 | 2016-01-20 | Glued board with Electro Magnetic Compatibility and preparation method thereof |
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| CN105599392B true CN105599392B (en) | 2018-02-06 |
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| CN107554000A (en) * | 2017-10-16 | 2018-01-09 | 广西南宁英凡达科技有限公司 | Display device shell with moisture absorbing |
| CN111286097A (en) * | 2018-12-06 | 2020-06-16 | 洛阳尖端技术研究院 | Wave-absorbing material and preparation method thereof |
| CN112255854B (en) * | 2020-11-06 | 2022-12-23 | 广西大学 | Zinc ion driven titanium dioxide electrochromic device and preparation method thereof |
| CN113059876B (en) * | 2021-03-20 | 2022-05-13 | 中南林业科技大学 | Shell structure wave-absorbing material and preparation method thereof |
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