CN104387880B - A kind of aqueous solar energy heat absorbing coating - Google Patents
A kind of aqueous solar energy heat absorbing coating Download PDFInfo
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- CN104387880B CN104387880B CN201410685738.6A CN201410685738A CN104387880B CN 104387880 B CN104387880 B CN 104387880B CN 201410685738 A CN201410685738 A CN 201410685738A CN 104387880 B CN104387880 B CN 104387880B
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Abstract
The invention discloses a kind of aqueous solar energy heat absorbing coating, this solar energy heat absorbing coating is by organosilicon-modified acrylic emulsion (silicone acrylic emulsion), sulfonated graphene, Co Al2O3Nano composite powder, yttrium stable zirconium oxide powder, SiC powder, superfine iron powder, extra-fine nickel powder, crystalline graphite powder, Ludox, deionized water, levelling agent and wetting agent etc., the aqueous solar energy heat absorbing coating being at room temperature uniformly mixed according to certain proportioning defibrination on skin grinder.Aqueous solar energy heat absorbing coating of the present invention have 0.90 0.94 absorbance, the emissivity of 0.18 0.20, the coating adhesion of 4B 5B level, the performances such as the pencil hardness of H, high stability and environmental protection, and preparation technology is simple, with low cost, it is prone to industrialized production, is particularly suitable for the solar energy heat absorbing coating of solar heat absorber.
Description
Technical field
The present invention relates to a kind of aqueous solar energy heat absorbing coating and preparation method thereof；Belong to new coating skill
Art field.
Background technology
Utilization of energy occupies very important status in human social development, but excessive exploiting natural resources
The utilization of resources with inefficient, makes facing mankind acid test.It is well known that solar energy is a kind of
Originate regenerative resource that is the abundantest and that can extensively obtain, to solving energy crisis and environmental problem has
Great effect, and solar energy with unique reserves unlimitedness, the universality existed, exploitation clear
Clean property so that it is become the focus that various countries are competitively studied.
Solar energy optical-thermal application be human use's solar energy the most simply, the most directly, most efficient method it
One, but after arriving the earth due to solar energy, energy density is less discontinuous, therefore, on a large scale again
Exploitation bring difficulty.For a long time, how low-grade solar energy is converted into high-grade
Heat energy, and solar energy is enriched with, in order to maximally utilise solar energy, become the heat of research
Door topic.In the middle of existing Photo-thermal technology application technology, coating for selective absorption technology is acknowledged as it
In the technology of more core, it is to improving solar heat conversion efficiency, large-scale promotion solar energy optical-thermal
Application plays vital effect.
Solar energy absorbing coating is broadly divided into spectral selective absorbing coating and high-absorbility absorber coatings,
Spectral selection heat absorbing coating is that one has visible-near-infrared high-selenium corn, reflects infrared light height
Special coating, i.e. it can effectively absorb solar energy, and the heat loss that after being heated, self long wave causes is very
Little, it is widely used in solar energy hot-cast socket, such as solar water heater, solar electrical energy generation etc..Solar energy
Heat absorbing coating is responsible for the important function receiving and absorbing solar energy, affects whole solar energy heat absorbing
The stability of system and the height of efficiency.Different with coating structure according to principle of absorption, can be selectivity
Heat absorbing coating is divided into interference filter type coating, body absorption-type coating, surface blacking type coating, convex-concave table
Face type coating.
There is the material of spectral selection absorption characteristic, it is necessary to be a kind of composite, i.e. by absorbing too
Solar irradiation and reflection absorption ftir spectroscopy two sections of material composition.Absorb radiation to refer to when material is passed through in radiation
Time, the radiation of some of which frequency absorbs with being combined into the particle selection of material, so that radiation is strong
The phenomenon that degree weakens.Absorb the essence of radiation, be that material particle occurs by low-lying level (generally ground state)
Transition to high level (excited state).In solar spectrum district, wavelength is at the sun spoke of 0.3～2.5 μm
Penetrating maximum intensity, the light quantum absorption to these spectral regions is crucial, therefore, only deposits in coating material
In the energy level transition corresponding with the energy of wavelength 0.3～2.5 μm photon, just there is preferably selection
Absorbability.
Chinese patent application 201410041807.X (Publication No. CN103788371 A) discloses one
Planting the application in preparing solar energy heat absorbing coating Han thiazole ring diamine compound, it is to use containing thiazole
Ring diamine compound carries out polyreaction prepare the polyimides containing thiazole ring with dianhydride monomer or derivant
Resin；Again resin is mixed with paint box solvent, be uniformly dispersed by ball milling and obtain solar energy heat absorbing painting
Material.Solar energy heat absorbing coating prepared by this invention has higher solar absorptance and relatively low transmitting
Rate, can be effectively improved the photothermal conversion efficiency of solar thermal collector.But due to the polyamides containing thiazole ring
Imide resin preparation time is longer, is required for adding substantial amounts of when in polymerization and using as coating simultaneously
Organic solvent, will produce bigger pollution to environment.
Chinese patent application 201210287343.1 (Publication No. CN103589275 A) discloses one
Plant solar energy heat absorbing coating and preparation method thereof, at normal temperatures by nano magnetic iron powder, multiple nano metal
Powder, ceramics, epoxy resin and multiple additives stir and are prepared from.The painting of the present invention
Material has high-absorbility, high thermal conductivity, low-E, can be widely applied to the suction of solar thermal collector
Hot coating.Cause its price higher and epoxy resin owing to coating employing multiple nanopowder
Firming agent is not mentioned, these factors can affect the application of the solar paint of this invention.
In sum, in the case of current energy source crisis is day by day serious, development and utilization includes solar energy
It is main path and the economic means solving crisis at interior new forms of energy.Solar thermal collector core technology
Heat absorbing coating cause relatively costly due to complicated process of preparation, key technology does not also make a breakthrough.This
Invention is intended to develop the solar energy heat absorbing that a kind of preparation technology flow process is simple, solar energy heat conversion is high
Coating.
Summary of the invention
It is an object of the invention to provide one and there is high-absorbility, high thermal conductivity, low-E, height
The aqueous solar energy heat absorbing coating of stability
A kind of aqueous solar energy heat absorbing coating, it counts its formula by weight and is:
Described aqueous solar energy heat absorbing coating, it is characterized in that, described sulfonated graphene,
Co-Al2O3Nano composite powder, yttrium stable zirconium oxide powder, SiC powder, superfine iron powder, extra-fine nickel powder and squama
The particle diameter of sheet graphite powder is respectively less than 10 microns.
Described aqueous solar energy heat absorbing coating, it is characterized in that, its preparation method is under room temperature
Solid powder and liquid material defibrination 30min-60min on skin grinder according to weight make it
Uniformly mixing, finally filters prepared solution with 1000 mesh drainage screens, molten by filtered
Liquid is loaded on sealed storage in container for paint, obtains aqueous solar energy heat absorbing coating.
Described aqueous solar energy heat absorbing coating, it is characterized in that, described Co-Al2O3Nano combined
The preparation technology of powder is by Al (NO3)3.9H2O and Co (NO3)2.6H2O is dissolved in a certain amount of deionized water
Form mixed solution, be added dropwise to the NH of 3-5mol/L4HCO3In solution, in order to prevent powder reuniting, adopt
With ultrasonic disperse and add Polyethylene glycol-2000 (PEG-2000) in solution as dispersant, same to time control
The pH value of solution processed is 8-9 and rate of titration is 20-40mL/min, analyses under continuous Quick mechanical stirs
Go out precipitate；Being dried at 90 DEG C after having deionized water wash repeatedly precipitate, gained powder body is lazy
Property atmosphere under 1200-1750 DEG C sintering 2h, finally powder body is put into and tube furnace is passed through hydrogen,
700-900 DEG C of reduction 1h i.e. obtains Co-Al2O3Nano composite powder.
Described aqueous solar energy heat absorbing coating, it is characterized in that, described aqueous solar energy is inhaled
Hot coating has the coating attachment of the absorbance of 0.90-0.94, the emissivity of 0.18-0.20,4B-5B level
Power, the pencil hardness of H, high stability and environmental protection performance.
Described aqueous solar energy heat absorbing coating, it is characterized in that, described wetting agent be SN-5027,
SN-5034、SuperChemSP-1211、SN-5040、BD-3071、ZC-290、DP512、X-405、
A kind of or at least two kinds of mixtures in PE-100 and YCK-2550.
Described aqueous solar energy heat absorbing coating, it is characterized in that, described levelling agent selects EFKA
3570, one or at least two in EFKA 3580, YCK-1360, BYK-333 and TEGO Glide 100
Plant mixture.
This aqueous solar energy heat absorbing coating is evenly applied to zinc surface of steel plate, and room temperature obtains after being fully cured
Aqueous solar energy heat absorbing coating to black.Coating performance is tested: employing Lambda 950 type ultraviolet/can
See/near infrared spectrometer and IR-2 type infrared emittance measuring instrument to assess coating absorbance and
Emissivity, measures the coating emissivity at certain wave band, respectively further according to international standard ISO 9845-1
Calculate solar absorptance and the emissivity of coating；The adhesive force of coating uses ASTMD 3359 standard to comment
Valency；Pencil hardness is tested according to GB/T 6739-96.
Beneficial effects of the present invention: coating prepared by aqueous solar energy heat absorbing coating of the present invention has high suction
Yield, high thermal conductivity, low-E, high stability, be particularly suitable for solar heat absorber too
Sun can heat-absorbing paint；Additionally, the preparation technology of the present invention is simple, with low cost, equipment requirements is low,
Production process environmental protection, it is easy to industrialized production.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
A kind of aqueous solar energy heat absorbing coating, it counts by weight:
By silicone acrylic emulsion 100 parts, sulfonated graphene 1 part, Co-Al2O3Nano composite powder 12 parts, yttrium
6 parts of stabilizing zirconia powder, 6 parts of SiC powder, superfine iron powder 10 parts, extra-fine nickel powder 4 parts, scale stone
Powdered ink 15 parts, Ludox 3 parts, deionized water 4 parts, levelling agent 0.5 part and wetting agent 0.5 part.
Under room temperature, solid powder and liquid material defibrination 30min on skin grinder according to weight proportion make material
Uniformly mixing, finally filters prepared solution with 1000 mesh drainage screens, molten by filtered
Liquid is loaded on sealed storage in container for paint, obtains described aqueous solar energy heat absorbing coating.
This aqueous solar energy heat absorbing coating is evenly applied to zinc surface of steel plate, and room temperature obtains after being fully cured
Aqueous solar energy heat absorbing coating to black.Coating detects its solar absorptance up to through performance
93.8%, emissivity is 18%, coating adhesion 4B-5B level, pencil hardness H.
Co-Al2O3The preparation technology of nano composite powder is by Al (NO3)3.9H2O and Co (NO3)2.6H2O is dissolved in
A certain amount of deionized water is formed mixed solution, is added dropwise to the NH of 3-5mol/L4HCO3In solution, for
Prevent powder reuniting, use ultrasonic disperse also to add Polyethylene glycol-2000 (PEG-2000) in solution
As dispersant, control the pH value of solution is 8-9 and rate of titration is 20-40mL/min, not simultaneously
Precipitate is separated out under disconnected Quick mechanical stirring；After having deionized water wash repeatedly precipitate at 90 DEG C
It is dried, gained powder body 1200-1750 DEG C of sintering 2h under an inert atmosphere, finally powder body is put into tube furnace
In be passed through hydrogen, 700-900 DEG C reduction 1h i.e. obtain Co-Al2O3Nano composite powder.
Embodiment 2
A kind of aqueous solar energy heat absorbing coating, it counts by weight:
By silicone acrylic emulsion 100 parts, sulfonated graphene 0.5 part, Co-Al2O3Nano composite powder 18 parts,
3 parts of yttrium stable zirconium oxide powder, 4 parts of SiC powder, superfine iron powder 5 parts, extra-fine nickel powder 8 parts, scale stone
Powdered ink 12 parts, Ludox 3 parts, deionized water 4 parts, levelling agent 0.5 part and wetting agent 0.5 part.
Under room temperature, solid powder and liquid material defibrination 40min on skin grinder according to weight proportion make material
Uniformly mixing, finally filters prepared solution with 1000 mesh drainage screens, molten by filtered
Liquid is loaded on sealed storage in container for paint, obtains described aqueous solar energy heat absorbing coating.
This aqueous solar energy heat absorbing coating is evenly applied to zinc surface of steel plate, and room temperature obtains after being fully cured
To the solar energy heat absorbing coating of black, coating detects its solar absorptance through performance and is up to 92.4%, sends out
The rate of penetrating is 24%, coating adhesion 4B-5B level, pencil hardness H.
Embodiment 3
A kind of aqueous solar energy heat absorbing coating, it counts by weight:
By silicone acrylic emulsion 100 parts, sulfonated graphene 2 parts, Co-Al2O3Nano composite powder 30 parts, yttrium
9 parts of stabilizing zirconia powder, 8 parts of SiC powder, superfine iron powder 15 parts, extra-fine nickel powder 12 parts, scale stone
Powdered ink 18 parts, Ludox 10 parts, deionized water 4 parts, levelling agent 0.5 part and wetting agent 0.5 part.
Under room temperature, solid powder and liquid material defibrination 60min on skin grinder according to weight proportion make material
Uniformly mixing, finally filters prepared solution with 1000 mesh drainage screens, molten by filtered
Liquid is loaded on sealed storage in container for paint, obtains described aqueous solar energy heat absorbing coating.
This aqueous solar energy heat absorbing coating is evenly applied to zinc surface of steel plate, and room temperature obtains after being fully cured
To the solar energy heat absorbing coating of black, coating detects its solar absorptance through performance and is up to 90.1%, sends out
The rate of penetrating is 20%, coating adhesion 4B level, pencil hardness H.
Embodiment 4
A kind of aqueous solar energy heat absorbing coating, its weight is:
Above-described is only the preferred embodiments of the present invention.It should be pointed out that, for this area
Those of ordinary skill for, without departing from the principles of the present invention, it is also possible to make some changing
Entering and modification, this is also considered as protection scope of the present invention.
Claims (6)
1. an aqueous solar energy heat absorbing coating, it is characterised in that counting its formula by weight is:
Described sulfonated graphene, Co-Al2O3The particle diameter of nano composite powder, yttrium stable zirconium oxide powder, SiC powder, superfine iron powder, extra-fine nickel powder and crystalline graphite powder is respectively less than 10 microns.
2. an aqueous solar energy heat absorbing coating as claimed in claim 1, it is characterized in that: its preparation method is that under room temperature, solid powder and liquid material defibrination 30min-60min on skin grinder according to weight makes it uniformly mix, and obtains described aqueous solar energy heat absorbing coating.
3. aqueous solar energy heat absorbing coating as claimed in claim 1 or 2, it is characterised in that: described Co-Al2O3The preparation technology of nano composite powder is by Al (NO3)3·9H2O and Co (NO3)2·6H2O is dissolved in a certain amount of deionized water formation mixed solution, is added dropwise to the NH of 3-5mol/L4HCO3In solution, in order to prevent powder reuniting, using ultrasonic disperse and add Polyethylene glycol-2000 (PEG-2000) in solution as dispersant, control the pH value of solution is 8-9 and rate of titration is 20-40ml/min simultaneously, separates out precipitate under continuous Quick mechanical stirs；It is dried at 90 DEG C after precipitate is washed with deionized repeatedly, gained powder body 1200-1750 DEG C of sintering 2h under an inert atmosphere, finally powder body is put into and tube furnace is passed through hydrogen, i.e. obtain Co-Al at 700-900 DEG C of reduction 1h2O3Nano composite powder.
4. aqueous solar energy heat absorbing coating as claimed in claim 1, it is characterized in that, described aqueous solar energy heat absorbing coating has the absorbance of 0.90-0.94, the emissivity of 0.18-0.20, the coating adhesion of 4B-5B level, the pencil hardness of H, high stability and environmental protection performance.
5. aqueous solar energy heat absorbing coating as claimed in claim 1, it is characterized in that, described wetting agent is a kind of in SN-5027, SN-5034, SuperChemSP-1211, SN-5040, BD-3071, ZC-290, DP512, X-405, PE-100 and YCK-2550 or at least two kinds of mixtures.
6. aqueous solar energy heat absorbing coating as claimed in claim 1, it is characterised in that described levelling agent selects a kind of in EFKA 3570, EFKA 3580, YCK-1360, BYK-333 and TEGO Glide 100 or at least two kinds of mixtures.
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Families Citing this family (26)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105038459A (en) * | 2015-08-21 | 2015-11-11 | 苏州高通新材料科技有限公司 | High-performance graphene-containing water-based acrylate coating as well as preparation method and application thereof |
| CN105820624A (en) * | 2016-05-13 | 2016-08-03 | 珠海市远康企业有限公司 | Nanometer ceramic and graphene compound paint for outdoor lamp and preparation method thereof |
| CN105860777A (en) * | 2016-06-21 | 2016-08-17 | 广西吉宽太阳能设备有限公司 | Nano modified solar heat-absorbing paint |
| CN106085224A (en) * | 2016-06-21 | 2016-11-09 | 广西吉宽太阳能设备有限公司 | Solar energy heat absorbing coating |
| CN106085065A (en) * | 2016-06-21 | 2016-11-09 | 广西吉宽太阳能设备有限公司 | The solar energy heat absorbing coating that a kind of nano-carbon powder is modified |
| CN106470505A (en) * | 2016-07-29 | 2017-03-01 | 李哲元 | Energy-conserving and environment-protective high temperature resistant type far-infrared health-care semiconductor heating slurry |
| CN106336801A (en) * | 2016-08-25 | 2017-01-18 | 黄万忠 | Solar heat absorption paint |
| CN106568206A (en) * | 2016-10-11 | 2017-04-19 | 西安电子科技大学 | TiC nanometer solar energy absorbent applied to solar water heater |
| CN106500373A (en) * | 2016-10-11 | 2017-03-15 | 西安电子科技大学 | A kind of SiC nano solar absorbent for being applied to solar water heater |
| CN106524525A (en) * | 2016-10-11 | 2017-03-22 | 西安电子科技大学 | Carbon black-graphene nanometer solar absorber applied to solar water heater |
| CN106546009A (en) * | 2016-10-11 | 2017-03-29 | 西安电子科技大学 | It is applied to the SiC Si of solar water heater3N4Solar absorption agent |
| CN106546010A (en) * | 2016-10-11 | 2017-03-29 | 西安电子科技大学 | It is applied to the TiC TiN nano solar absorbent of solar water heater |
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| CN1099782A (en) * | 1993-09-04 | 1995-03-08 | 青岛建筑工程学院 | Solar energy absorbing paint |
| DE10117785A1 (en) * | 2001-04-10 | 2002-10-17 | Bayer Ag | Heat absorbing layer system containing IR and UV absorbers useful for heat insulation in automobile and building industries has outstanding long term weather resistance and excellent transparency and glaze |
| CN101705037A (en) * | 2009-11-19 | 2010-05-12 | 上海第二工业大学 | Method for preparing solar selective heat-absorbing paint |
| CN102134428B (en) * | 2010-12-31 | 2012-09-19 | 西安经建油漆股份有限公司 | Solar-absorbing coating |
| CN103360803A (en) * | 2013-07-03 | 2013-10-23 | 余历军 | Preparation method of heteromultimeric solar modified silica sol selective heat absorbing coating |
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