CN106572626A - Absorbing material with improved substrate - Google Patents

Absorbing material with improved substrate Download PDF

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Publication number
CN106572626A
CN106572626A CN201610989236.1A CN201610989236A CN106572626A CN 106572626 A CN106572626 A CN 106572626A CN 201610989236 A CN201610989236 A CN 201610989236A CN 106572626 A CN106572626 A CN 106572626A
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powder
graphene
absorbing material
carbon black
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张达明
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Wuxi Mingsheng Strong Blower Co Ltd
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Wuxi Mingsheng Strong Blower Co Ltd
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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
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/02—Layered products comprising a layer of natural or synthetic rubber with fibres or particles being present as additives in the layer
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/042—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of natural rubber or synthetic rubber
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber 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
    • 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
    • B32B25/00—Layered products comprising a layer of natural or synthetic rubber
    • B32B25/18—Layered products comprising a layer of natural or synthetic rubber comprising butyl or halobutyl rubber
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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    • C08K3/02—Elements
    • C08K3/08—Metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances
    • 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
    • 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
    • B32B2264/102—Oxide or hydroxide
    • 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
    • B32B2264/104—Oxysalt, e.g. carbonate, sulfate, phosphate or nitrate particles
    • 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
    • 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
    • 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
    • B32B2264/12—Mixture of at least two particles made of different materials
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/08—Metals
    • C08K2003/0856—Iron
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2265—Oxides; Hydroxides of metals of iron
    • C08K2003/2275—Ferroso-ferric oxide (Fe3O4)

Abstract

The invention discloses an absorbing material with an improved substrate, which is composed of an impedance matching layer, a loss layer and a reflection layer from top to bottom, wherein graphene powder/barium titanate powder is dispersed in polyaniline to form the impedance matching layer; carbonyl iron powder is dispersed in chloroprene rubber to form the loss layer; 5 to 20 wt% of a silica/carbon black composite material is dispersed in chloroprene rubber to form the reflection layer; and the impedance matching layer contains 2 to 5% of graphene/barium titanate powder or graphene/magnetite powder. The shielding performance of the absorbing material of the invention can be increased to -39.7 to -43.8dB.

Description

A kind of absorbing material for improving substrate
Technical field
The present invention relates to new material technology field, more particularly to a kind of absorbing material for improving substrate.
The present invention is earlier application " a kind of Graphene modified ferroferric oxide wave absorbing material " and " a kind of Graphene is modified Barium metatitanate. absorbing material " improvement invention.
Background technology
With the development of modern science and technology, impact of the electromagenetic wave radiation to environment increasingly increases.Airport, machine flight because Electromagnetic Interference cannot take off and overdue；The normal work of various electronic instrument for diagnosing and curing diseases devices can be often disturbed in hospital, mobile phone.Cause This, administers electromagnetic pollution, finds a kind of material that can be kept out and weaken electromagenetic wave radiation --- absorbing material, it has also become material supply section The big problem learned.
Absorbing material refers to can be absorbed, decaying projects the electromagnetic wave energy of material surface, and by electromagnetic energy by material The dielectric loss in portion is converted into into the class functional material that the energy dissipation of the other forms such as heat energy is fallen.Absorbing material is by absorbing Agent, adhesive and various auxiliary agents composition, the electromagnetic performance of wherein absorbent determines the quality of microwave absorbing coating performance, in cell material Misusing for key is played in material.
Present inventors have proposed a kind of absorbing material structure, it is from top to bottom by impedance matching layer, depletion layer and reflecting layer Composition, per layer of effect is different, and its material for containing also is not quite similar.Through various verification experimental verifications, it was demonstrated that the structure design is to close Reason is effective.Therefore the present inventor carries out material to each functional layer and selects Optimal improvements, to optimizing its absorbing property, research And the specific matching relationship between each functional layer material is improved, while having derived a series of applications.
With the development of modern crafts, the requirement more and more higher to absorbing material, it is desirable to while wave-absorbing effect is preferable, Possess preferable physical and mechanical propertiess, preferable heat-resisting quantity and working service simple etc..
The content of the invention
It is an object of the invention to propose a kind of absorbing material of improvement substrate, absorbing material performance protrusion is enabled to.
A kind of earlier application " Graphene modified Barium metatitanate. absorbing material " of inventor and " a kind of Graphene be modified four Fe 3 O absorbing material " is made using the modified Barium metatitanate. absorbing material of graphene powder/ferroso-ferric oxide powder body and Graphene To inhale ripple main material, the substrate of its impedance matching layer is neoprene.Inventor is optimized to the absorbing material, to substrate It is optimized, seeks the absorbing material of higher performance, to improves absorbing property.
It is that, up to this purpose, the present invention is employed the following technical solutions：
A kind of absorbing material, especially a kind of absorbing material for improving substrate, it is from top to bottom by impedance matching layer, loss Layer and reflecting layer composition, impedance matching layer by 2-5% Graphene/barium carbonate powder or Graphene/ferroso-ferric oxide powder body point It is scattered to be formed in polyaniline, depletion layer is distributed in neoprene for hydroxy iron powder and is formed, and reflecting layer is by 5-20wt% quartz/charcoal Black composite is distributed in neoprene and is formed.
White carbon black belongs to a kind of conductive filler, therefore the quartz/carbon black composite material of the present invention, and it is to shielding electromagnetic waves master Depend on the reflection to incident electromagnetic wave.When quartz/carbon black composite material surface of the electromagnetic wave incident to the present invention, There is serious polarization in its material internal, the concussion for making electromagnetic field forms vortex in material internal conductive network, turn electromagnetic energy Turn to heat energy and consume.Increase when content of carbon black forms conductive network number in material internal, the electric conductivity of material strengthens, So that electromagnetic wave strengthens in the reflecting properties of material surface, the shielding propertiess of material also strengthen therewith.
Due to the high conductivity and tunnel conduction effect of white carbon black, little white carbon black addition is typically only needed to, it is possible to shape Into relatively advanced conductive network, can ensure that matrix material has good mechanical property after mixing with matrix material, Therefore in the quartz/carbon black composite material of the present invention, the volumn concentration of white carbon black is 1-15vol%.
The preparation method of the quartz/carbon black composite material of the present invention is as follows：
(1) proportionally silica flour and white carbon black is put into into ball mill, ball milling 4-6 hours obtain powder；
(2) add and account for the waterglass of powder quality 20-30wt%, it is 8- to add and account for the concentration of powder quality 20-30wt The polyvinyl alcohol of 12wt%, it is compressing after being uniformly mixed；
(3) moulded products that the molding is obtained are heated to into 180-220 DEG C, constant temperature at least 3 hours；
(4) profiled member after heat treatment is ground into into powder, obtains the quartz/carbon black composite material.
Preferably, the graphene powder/ferroso-ferric oxide powder preparation method is as follows：
(1) under condition of ice bath, under mechanical agitation, crystalline graphite powder is added in 98% concentrated sulphuric acid, adds and account for The sodium nitrate of graphite powder 50-80wt%, and account under the potassium permanganate of 2-4 times of weight of graphite powder, ice bath and react 30-120min；
(2) 30-40 DEG C of constant temperature 4-5h is heated to, deionized water and hydrogen peroxide is added, 1-3h is stirred, 5% concentration is added HCl centrifuge washings are until sulfate radical-free ion, after being dried graphene oxide is obtained；
(3) described graphene oxide is distributed in ethanol solution, ultrasonic disperse obtains graphene oxide colloid Solution；
(4) the graphene oxide colloid solution is heated to into 65-75 DEG C, stirring is lower to add mass concentration to be 70-85% Hydrazine hydrate, reaction 0.5-2 hours after, according to Graphene:Ferroso-ferric oxide mass ratio is 2:1～1:2 ratio, adds four oxygen Change three iron powders, mix homogeneously；
(5) centrifugation and wash, vacuum drying obtains graphene powder/ferroso-ferric oxide powder body.
Preferably, the graphene powder/barium titanate powder preparation of the invention is as follows：
(1) under condition of ice bath, under mechanical agitation, crystalline graphite powder is added in 98% concentrated sulphuric acid, adds and account for The sodium nitrate of graphite powder 50-80wt%, and account under the potassium permanganate of 2-4 times of weight of graphite powder, ice bath and react 30-120min；
(2) 30-40 DEG C of constant temperature 4-5h is heated to, deionized water and hydrogen peroxide is added, 1-3h is stirred, 5% concentration is added HCl centrifuge washings are until sulfate radical-free ion, after being dried graphene oxide is obtained；
(3) described graphene oxide is distributed in ethanol solution, ultrasonic disperse obtains graphene oxide colloid Solution；
(4) the graphene oxide colloid solution is heated to into 65-75 DEG C, stirring is lower to add mass concentration to be 70-85% Hydrazine hydrate, reaction 0.5-2 hours after, according to Graphene:Barium metatitanate. mass ratio is 2:1～1:2 ratio, adds barium titanate powder End, mix homogeneously；
(5) centrifugation and wash, vacuum drying obtains graphene powder/barium carbonate powder.
The present invention is combined by specific recipe ingredient, devise impedance matching layer/depletion layer/reflecting layer composition three layers Thin film, its positive wave-absorbing effect is significantly better than reverse side, it was demonstrated that the membrane structure design it is correct.
Absorbing material of the present invention, its thickness be 0.2mm when, when using graphite as reflecting layer principal goods matter, Its absorption maximum is only -15.2dB.When the quartz/carbon black composite material of the present invention is replaced with, its shielding properties increases to- 39.7～-43.8dB, the reflecting material excellent performance of the present invention.
Specific embodiment
Technical scheme is further illustrated below by specific embodiment.
Embodiment 1
A kind of absorbing material for improving substrate, it is made up of from top to bottom impedance matching layer, depletion layer and reflecting layer, impedance Matching layer is distributed in polyaniline and is formed by 2% graphene powder/barium carbonate powder, and depletion layer is distributed to neoprene for hydroxy iron powder Formed in rubber, reflecting layer is distributed in neoprene and is formed by quartz/carbon black composite material.The quartz/white carbon black composite wood In material, white carbon black accounts for 8wt%.
The preparation method of the quartz/carbon black composite material is as follows：
(1) proportionally silica flour and white carbon black is put into into ball mill, ball milling 4 hours obtains powder；
(2) waterglass for accounting for powder quality 20wt% is added, the concentration for accounting for powder quality 20wt% is added for 8wt%'s Polyvinyl alcohol, it is compressing after being uniformly mixed；
(3) moulded products that the molding is obtained are heated to into 180 DEG C, constant temperature at least 3 hours；
(4) profiled member after heat treatment is ground into into powder, obtains the quartz/carbon black composite material.
Jing is tested, the absorbing material, and, when thickness is 0.2mm, shielding propertiess increase to -39dB for it.
Comparative example 1
A kind of absorbing material for improving substrate, it is made up of from top to bottom impedance matching layer, depletion layer and reflecting layer, impedance Matching layer is distributed in polyaniline and is formed by graphene powder/barium carbonate powder, and depletion layer is distributed to neoprene rubber for hydroxy iron powder Formed in glue, reflecting layer by being formed in graphite dispersion to neoprene, the impedance matching layer contain 2% graphene powder/ Barium carbonate powder.
The graphene powder/barium titanate powder preparation is as follows：
(1) under condition of ice bath, under mechanical agitation, crystalline graphite powder is added in 98% concentrated sulphuric acid, adds and account for The sodium nitrate of graphite powder 80wt%, and account under the potassium permanganate of 2 times of weight of graphite powder, ice bath and react 30min；
(2) 30 DEG C of constant temperature 4h are heated to, deionized water and hydrogen peroxide is added, 1h is stirred, the HCl centrifugations of 5% concentration are added Washing is until sulfate radical-free ion, after being dried graphene oxide is obtained；
(3) described graphene oxide is distributed in ethanol solution, ultrasonic disperse obtains graphene oxide colloid Solution；
(4) the graphene oxide colloid solution is heated to into 65 DEG C, stirring is lower to add the hydration that mass concentration is 85% Hydrazine, after reacting 0.5 hour, according to Graphene:Barium metatitanate. mass ratio is 1:2 ratio, adds barium titanate powder, mix homogeneously；
(5) centrifugation and wash, vacuum drying obtains graphene powder/barium carbonate powder.
Embodiment 2
A kind of absorbing material for improving substrate, it is made up of from top to bottom impedance matching layer, depletion layer and reflecting layer, impedance Matching layer is distributed in polyaniline and is formed by Graphene/ferroso-ferric oxide powder body, and depletion layer is distributed to neoprene rubber for hydroxy iron powder Formed in glue, reflecting layer by being formed in graphite dispersion to neoprene, the impedance matching layer contain 2% graphene powder/ Ferroso-ferric oxide powder body.
The graphene powder/ferroso-ferric oxide powder preparation method is as follows：
(1) under condition of ice bath, under mechanical agitation, crystalline graphite powder is added in 98% concentrated sulphuric acid, adds and account for The sodium nitrate of graphite powder 80wt%, and account under the potassium permanganate of 2 times of weight of graphite powder, ice bath and react 30min；
(2) 30 DEG C of constant temperature 4h are heated to, deionized water and hydrogen peroxide is added, 1h is stirred, the HCl centrifugations of 5% concentration are added Washing is until sulfate radical-free ion, after being dried graphene oxide is obtained；
(3) described graphene oxide is distributed in ethanol solution, ultrasonic disperse obtains graphene oxide colloid Solution；
(4) the graphene oxide colloid solution is heated to into 65 DEG C, stirring is lower to add the hydration that mass concentration is 85% Hydrazine, after reacting 0.5 hour, according to Graphene:Ferroso-ferric oxide mass ratio is 1:2 ratio, adds ferroferric oxide powder, mixes Close uniform；
(5) centrifugation and wash, vacuum drying obtains graphene powder/ferroso-ferric oxide powder body.
Its absorption maximum of the absorbing material of comparative example 1 is more than -15.2dB.
Embodiment 1 proves that quartz/carbon black composite material of the present invention can significantly increase suction with the contrast of comparative example 1 Ripple performance.

Claims (5)

1. it is a kind of improve substrate absorbing material, it is made up of from top to bottom impedance matching layer, depletion layer and reflecting layer, impedance It is distributed in polyaniline and is formed by the Graphene/barium carbonate powder or Graphene/ferroso-ferric oxide powder body of 2-5% with layer, is lost Layer is distributed in neoprene for hydroxy iron powder and is formed, and reflecting layer is distributed to neoprene by 5-20wt% quartz/carbon black composite material Formed in rubber.
2. the absorbing material of substrate is improved as claimed in claim 1, it is characterised in that the Graphene/ferroso-ferric oxide powder Preparation is as follows：
(1) under condition of ice bath, under mechanical agitation, crystalline graphite powder is added in 98% concentrated sulphuric acid, adds and account for graphite The sodium nitrate of powder 50-80wt%, and account under the potassium permanganate of 2-4 times of weight of graphite powder, ice bath and react 30-120min；
(2) be heated to 30-40 DEG C of constant temperature 4-5h, add deionized water and hydrogen peroxide, stir 1-3h, add the HCl of 5% concentration from Heart washing is until sulfate radical-free ion, after being dried graphene oxide is obtained；
(3) described graphene oxide is distributed in ethanol solution, ultrasonic disperse obtains graphene oxide colloid solution；
(4) the graphene oxide colloid solution is heated to into 65-75 DEG C, stirring is lower to add mass concentration for the water of 70-85% Hydrazine is closed, after reaction 0.5-2 hours, according to Graphene:Ferroso-ferric oxide mass ratio is 2:1～1:2 ratio, adds four oxidations three Iron powder, mix homogeneously；
(5) centrifugation and wash, vacuum drying obtains graphene powder/ferroso-ferric oxide powder body.
3. the absorbing material of substrate is improved as claimed in claim 1, it is characterised in that the Graphene/barium titanate powder system Preparation Method is as follows：
(1) under condition of ice bath, under mechanical agitation, crystalline graphite powder is added in 98% concentrated sulphuric acid, adds and account for graphite The sodium nitrate of powder 50-80wt%, and account under the potassium permanganate of 2-4 times of weight of graphite powder, ice bath and react 30-120min；
(2) be heated to 30-40 DEG C of constant temperature 4-5h, add deionized water and hydrogen peroxide, stir 1-3h, add the HCl of 5% concentration from Heart washing is until sulfate radical-free ion, after being dried graphene oxide is obtained；
(3) described graphene oxide is distributed in ethanol solution, ultrasonic disperse obtains graphene oxide colloid solution；
(4) the graphene oxide colloid solution is heated to into 65-75 DEG C, stirring is lower to add mass concentration for the water of 70-85% Hydrazine is closed, after reaction 0.5-2 hours, according to Graphene:Barium metatitanate. mass ratio is 2:1～1:2 ratio, adds barium titanate powder, Mix homogeneously；
(5) centrifugation and wash, vacuum drying obtains graphene powder/barium carbonate powder.
4. the absorbing material of the improvement substrate as described in one of claim 1-3, it is characterised in that the quartz/white carbon black is combined In material, white carbon black accounts for 1-15vol%.
5. the absorbing material of the improvement substrate as described in one of claim 1-4, it is characterised in that the quartz/white carbon black is combined The preparation method of material is as follows：
(1) proportionally silica flour and white carbon black is put into into ball mill, ball milling 4-6 hours obtain powder；
(2) add and account for the waterglass of powder quality 20-30wt%, it is 8- to add and account for the concentration of powder quality 20-30wt The polyvinyl alcohol of 12wt%, it is compressing after being uniformly mixed；
(3) moulded products that the molding is obtained are heated to into 180-220 DEG C, constant temperature at least 3 hours；
(4) profiled member after heat treatment is ground into into powder, obtains the quartz/carbon black composite material.
CN201610989236.1A 2016-11-10 2016-11-10 Absorbing material with improved substrate Pending CN106572626A (en)

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CN107123500A (en) * 2017-06-13 2017-09-01 安徽中研辐射防护有限公司 A kind of composite wave-suction material

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Application publication date: 20170419