CN106630927B - A kind of heat-insulation composite material - Google Patents
A kind of heat-insulation composite material Download PDFInfo
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- CN106630927B CN106630927B CN201610942759.0A CN201610942759A CN106630927B CN 106630927 B CN106630927 B CN 106630927B CN 201610942759 A CN201610942759 A CN 201610942759A CN 106630927 B CN106630927 B CN 106630927B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B30/00—Compositions for artificial stone, not containing binders
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/04—Silica-rich materials; Silicates
- C04B14/06—Quartz; Sand
- C04B14/064—Silica aerogel
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B14/02—Granular materials, e.g. microballoons
- C04B14/34—Metals, e.g. ferro-silicon
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/00258—Electromagnetic wave absorbing or shielding materials
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/30—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values
- C04B2201/32—Mortars, concrete or artificial stone characterised by specific physical values for heat transfer properties such as thermal insulation values, e.g. R-values for the thermal conductivity, e.g. K-factors
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Civil Engineering (AREA)
- Dispersion Chemistry (AREA)
- Thermal Insulation (AREA)
- Laminated Bodies (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
This application involves a kind of heat-insulation composite material, the heat-insulated phase of the heat-insulation composite material is SiO2The electromagnetic shielding of aeroge, the heat-insulation composite material is mutually copper mesh；The SiO2Aeroge is plate, and intermediate course is the copper mesh, good for electromagnetic shielding and heat insulation, is had wide range of applications, and has certain market prospects.
Description
Technical field
This application involves heat-barrier material field more particularly to a kind of heat-insulation composite materials.
Background technology
Heat-barrier material is a kind of functional material, is a kind of material that can block heat flow transmission, such material has spy
Fixed high thermal resistance function, has the characteristics that light-weight, porous, thermal conductivity is low.
In terms of thermal insulation protection, for some equipment sensitive to environment temperature, due to device housings heat insulation not
It is good, the development of some equipment such as high-power has seriously been hindered, such as in terms of thermal cell, in terms of vehicle, there is an urgent need to
A kind of high efficiency heat insulation material；In terms of energy conservation, efficient heat-barrier material can improve the utilization rate of the energy and save energy
Source.
Invention content
For realistic problem set forth above, the present invention is intended to provide a kind of heat-insulation composite material.
A kind of heat-insulation composite material is provided in the embodiment of the present invention, the heat-insulated phase of the heat-insulation composite material is SiO2
The electromagnetic shielding of aeroge, the heat-insulation composite material is mutually copper mesh；The SiO2Aeroge is plate, and intermediate course is described
Copper mesh.
The technical solution that the embodiment of the present invention provides can include the following benefits：
Heat-insulation composite material of the present invention has heat-insulated and electromagnetic shielding double effects, and structure and preparation process are simpler
It is single, it is good for electromagnetic shielding and heat insulation, it has wide range of applications, there are certain market prospects, to solve above-mentioned carry
It goes wrong.
The additional aspect of the application and advantage will be set forth in part in the description, and will partly become from the following description
It obtains obviously, or recognized by the practice of the application.It should be understood that above general description and following detailed description are only
It is exemplary and explanatory, the application can not be limited.
Description of the drawings
Using attached drawing, the invention will be further described, but the embodiment in attached drawing does not constitute any limit to the present invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the structural schematic diagram of heat-insulation composite material of the present invention.
Specific implementation mode
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.On the contrary, they be only with it is such as appended
The example of the consistent device and method of some aspects being described in detail in claims, of the invention.
Embodiments herein is related to a kind of heat-insulation composite material, such as the structure for the heat-insulation composite material that Fig. 1 is the application
The heat-insulated phase of schematic diagram, the heat-insulation composite material is SiO2The electromagnetic shielding of aeroge 10, the heat-insulation composite material is mutually
Copper mesh 20；The SiO2Aeroge 10 is plate, and intermediate course is the copper mesh 20, the SiO of the plate210 thickness of aeroge is
2mm。
In the application, in order to reach electromagnetic shielding and heat-insulated double effects, with SiO2Aeroge is heat insulator, and is adopted
With gel integral forming process；The forming process of the heat-insulation composite material is：SiO is prepared first2Then colloidal sol adds wherein
Enter anti-Electromagnetic enhancement body and opacifier, obtain colloidal sol mixture, then make colloidal sol mixture that the copper mesh is coated on centre, passes through
After crossing aging, supercritical drying, colloidal sol mixes body formed formation SiO2Aeroge, the heat-insulation composite material of construction cost application；
The copper mesh can both enhance SiO2The mechanical property of aeroge, and there is effectiveness.
Preferably, 20 string diameter of the copper mesh is 0.1mm, aperture 0.1mm；The copper mesh electroplating surface has nickel layer, described
Nickel layer thickness is 5 microns.
The electromagnetic shielding of heat-insulation composite material is mutually copper mesh, and the copper mesh processing technology is simple, cheap, and netted knot
SiO can be filled among structure2Aeroge so that the SiO of copper mesh both sides2Aeroge physics is continuous, avoids to heat insulation
It influences；The copper mesh surface is coated with one layer of nickel layer simultaneously, since simple metallic copper screen covers ineffective, the plating one on its surface
Layer nickel layer, with SiO2Anti- Electromagnetic enhancement body contact in aeroge, forms the three-dimensional structure of electromagnetic shielding, substantially increases electricity
Magnetic Shielding Effectiveness.
Preferably, the SiO2In aeroge 10, opacifier is carbon black, TiO2, ceramic powder mixture, the mixture
Middle carbon black, TiO2, ceramic powder mass ratio be 1:4:9.
Due to SiO2Aeroge has stronger permeability to the near-infrared of 3~8 microns of wavelength at high temperature, cause its
Thermal conductivity is higher under high temperature, and heat insulation is poor, using carbon black, TiO in the application heat-insulation composite material2, ceramic powder mixing
Object can effectively absorb or scatter near-infrared radiation as opacifier, to effectively reduce the high temperature of heat-insulation composite material
Radiant heat conductanc enhances its high temperature insulating effect.
It is further preferred that the preparation process of the heat-insulation composite material is as follows：
Step 1 prepares SiO2Colloidal sol
Use ethyl orthosilicate for silicon source, ethyl alcohol is solvent, and hydrochloric acid-ammonium hydroxide two-step catalysis method prepares SiO2Colloidal sol, first
Prepare ethyl orthosilicate and ethyl alcohol mixed solution, then while stirring be added deionized water, HCl and ethyl alcohol mixed liquor, it is quiet
Set a period of time, CuO particles be added, as catalyst so that ethyl orthosilicate is fully hydrolyzed, add going of centainly matching from
Sub- water, NH3·H2O and ethyl alcohol three's mixture, obtain SiO2Colloidal sol；Wherein, each component molar ratio is：1 ethyl orthosilicate：
5H2O：10 ethyl alcohol：1.8×10-3HCl：3.6×10-3NH3·H2O；
Step 2 adds anti-Electromagnetic enhancement body and opacifier
Use nickel-coated carbon fibers, tin grain for anti-Electromagnetic enhancement body, carbon black, TiO2, ceramic powder mixture be opacifier,
A diameter of 50 microns of middle nickel-coated carbon fibers, tin grain, carbon black, TiO2, ceramic powder grain size be 10 microns；By what is obtained in step 1
SiO2Colloidal sol pours into the container equipped with nickel-coated carbon fibers, is then proportionally added into carbon black, TiO2, ceramic powder mixture, machinery
Stirring, adds tin grain, continues to stir evenly, obtain colloidal sol mixture；
Wherein, nickel-coated carbon fibers volume fraction is 8~15%；
Step 3 prepares copper mesh
The copper mesh of suitable size is taken, then electroplating technology is utilized to plate one layer of nickel layer on copper mesh surface；
Step 4, cladding and aging
The copper mesh of nickel plating is immersed in the colloidal sol mixture that step 2 obtains, after colloidal sol mixture gel, pours into ethyl alcohol
To prevent the ethyl alcohol in gel from volatilizing, prevent gel surface from cracking, and wet gel is made to stand 1~2 day in alcohol solvent, so that
The polycondensation reaction of gel continues, and network structure continues to grow up, and skeleton is more secured；
Step 5, supercritical drying
A) the colloidal sol mixture and alcohol solvent of aging are placed in the autoclave of sealing, are slowly heated up, pressure increases
Greatly, when temperature and pressure is more than the super critical point of solvent, one liquid interface of alcohol solvent gas disappears, and surface tension has not existed,
20h is kept the temperature in this state；
B) keep temperature-resistant, by solvent slow release until pressure is reduced to normal pressure；
C) when pressure reaches normal pressure, temperature in the kettle is reduced to room temperature, kettle sampling is opened and can be obtained SiO2Aeroge；
D) SiO obtained above is taken2Aeroge is cut into the thin plate of thickness 3mm, and the copper mesh is located at
To get to heat-insulation composite material among thin plate.
The heat-insulation composite material of the application is in terms of experiment effect：
In terms of heat insulation, under room temperature, the thermal conductivity of composite heat-insulated material is 0.015W/mK, and is increased with temperature
Increase slowly, at 100 DEG C, thermal conductivity 0.019W/mK, at 500 DEG C, thermal conductivity 0.031W/mK；At 800 DEG C
Under, thermal conductivity 0.049W/mK；
In terms of electromagnetic shielding, in the heat-insulation composite material of the application, when electromagnetic wave is fixed as 1500MHz, nickel-plated carbon
Fiber volume fraction influences electromagnet shield effect, if the following table 1 is the corresponding electromagnetic shielding effect of different nickel-coated carbon fibers volume fractions
Can, when nickel-coated carbon fibers volume fraction is 12%, the effectiveness of the heat-insulation composite material is best.
The corresponding electromagnet shield effect of 1 nickel-coated carbon fibers volume fraction of table
| Nickel-coated carbon fibers volume fraction % | Electromagnet shield effect dB |
| 8 | 63 |
| 10 | 74 |
| 12 | 79 |
| 14 | 73 |
| 15 | 66 |
The foregoing is merely the preferred modes of the present invention, are not intended to limit the invention, all spirit and original in the present invention
Within then, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (2)
1. a kind of heat-insulation composite material, which is characterized in that the heat-insulated phase of the heat-insulation composite material is SiO2Aeroge, it is described every
The electromagnetic shielding of hot composite material is mutually copper mesh；The SiO2Aeroge is plate, and intermediate course is the copper mesh；The copper mesh
String diameter be 0.1mm, aperture 0.1mm；It is 5 microns that the copper mesh electroplating surface, which has nickel layer, the nickel layer thickness,；The SiO2
In aeroge, opacifier is carbon black, TiO2, ceramic powder mixture, carbon black, TiO in the mixture2, ceramic powder mass ratio
Example is 1:4:9；
The preparation process of the heat-insulation composite material is as follows：
Step 1 prepares SiO2Colloidal sol
Use ethyl orthosilicate for silicon source, ethyl alcohol is solvent, and hydrochloric acid-ammonium hydroxide two-step catalysis method prepares SiO2Colloidal sol is prepared just first
The mixed solution of silester and ethyl alcohol, then while stirring be added deionized water, HCl and ethyl alcohol mixed liquor, stand one section
Time, be added CuO particles, as catalyst so that ethyl orthosilicate is fully hydrolyzed, add the deionized water centainly matched,
NH3·H2O and ethyl alcohol three's mixture, obtain SiO2Colloidal sol；Wherein, each component molar ratio is：1 ethyl orthosilicate：5H2O：10
Ethyl alcohol：1.8×10-3HCl：3.6×10-3NH3·H2O；
Step 2 adds anti-Electromagnetic enhancement body and opacifier
Use nickel-coated carbon fibers, tin grain for anti-Electromagnetic enhancement body, carbon black, TiO2, ceramic powder mixture be opacifier, wherein plating
Nickel carbon fiber diameter is 50 microns, tin grain, carbon black, TiO2, ceramic powder grain size be 10 microns；The SiO that will be obtained in step 12
Colloidal sol pours into the container equipped with nickel-coated carbon fibers, is then proportionally added into carbon black, TiO2, ceramic powder mixture, machinery stirs
It mixes, adds tin grain, continue to stir evenly, obtain colloidal sol mixture；
Wherein, nickel-coated carbon fibers volume fraction is 8~15%；
Step 3 prepares copper mesh
The copper mesh of suitable size is taken, then electroplating technology is utilized to plate one layer of nickel layer on copper mesh surface；
Step 4, cladding and aging
The copper mesh of nickel plating is immersed in the colloidal sol mixture that step 2 obtains, after colloidal sol mixture gel, pour into ethyl alcohol to prevent
The only ethyl alcohol volatilization in gel, prevents gel surface from cracking, and wet gel is made to stand 1~2 day in alcohol solvent, so that gel
Polycondensation reaction continue, network structure continues to grow up, and skeleton is more secured；
Step 5, supercritical drying
A) the colloidal sol mixture and alcohol solvent of aging are placed in the autoclave of sealing, are slowly heated up, pressure increases, and waits for
When temperature and pressure is more than the super critical point of solvent, one liquid interface of alcohol solvent gas disappears, and surface tension has not existed, in the shape
20h is kept the temperature under state；
B) keep temperature-resistant, by solvent slow release until pressure is reduced to normal pressure；
C) when pressure reaches normal pressure, temperature in the kettle is reduced to room temperature, kettle sampling is opened and can be obtained SiO2Aeroge；
D) SiO obtained above is taken2Aeroge is cut into the thin plate of thickness 3mm, and the copper mesh is made to be located at thin plate
Centre is to get to heat-insulation composite material.
2. a kind of heat-insulation composite material according to claim 1, which is characterized in that the SiO of the plate2Aeroge thickness
For 2mm.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628804A (en) * | 2008-07-18 | 2010-01-20 | 山东鲁阳股份有限公司 | Aerogel heat insulation composite material and preparation method thereof |
| CN104250070A (en) * | 2013-06-28 | 2014-12-31 | 深圳光启高等理工研究院 | Microwave absorbing material and preparation method thereof |
| CN104496403A (en) * | 2014-12-23 | 2015-04-08 | 南京唯才新能源科技有限公司 | Reinforced aerogel composite material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101628804A (en) * | 2008-07-18 | 2010-01-20 | 山东鲁阳股份有限公司 | Aerogel heat insulation composite material and preparation method thereof |
| CN104250070A (en) * | 2013-06-28 | 2014-12-31 | 深圳光启高等理工研究院 | Microwave absorbing material and preparation method thereof |
| CN104496403A (en) * | 2014-12-23 | 2015-04-08 | 南京唯才新能源科技有限公司 | Reinforced aerogel composite material and preparation method thereof |
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