CN105713502A - High-light-absorptivity solar heat-absorbing paint - Google Patents
High-light-absorptivity solar heat-absorbing paint Download PDFInfo
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- CN105713502A CN105713502A CN201610248189.5A CN201610248189A CN105713502A CN 105713502 A CN105713502 A CN 105713502A CN 201610248189 A CN201610248189 A CN 201610248189A CN 105713502 A CN105713502 A CN 105713502A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/32—Radiation-absorbing paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/41—Organic pigments; Organic dyes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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Abstract
The invention discloses a high-light-absorptivity solar heat-absorbing paint which can be used for any heat collection device capable of converting solar energy into heat energy. The paint is formed by dispersing and uniformly mixing a resin, a light absorber, a solvent and aids according to certain parts by weight by a sand mill. By using the light absorber treated by a novel simple mode as the critical raw material for preparing the paint, the sunlight absorptivity of the paint is greatly enhanced, so that the light-heat conversion efficiency of the heat collection device is enhanced. Besides, the paint has the advantages of excellent weather resistance and longer service life.
Description
[technical field]
The present invention relates to heat-absorbing paint, particularly relate to a kind of solar paint that sunlight absorbance is high.
[background technology]
Under the present situation increasingly rare at world today's energy, problem of environmental pollution is increasingly severe, as the energy cleaned most, Solar use had obtained extensive attention both domestic and external already, and wherein solar energy heating utilization research and application are one of very important modes.But it is low to make to directly utilize efficiency owing to solar energy density is low, even cannot utilize.Therefore, the absorbance size of sunlight is just become the core utilizing solar energy by solar paint.Solar paint mainly has reflected solar energy coating and absorbs solar paint.Reflected solar energy coating is mainly used in heat-insulating, absorbs and is then used forBuilding heat preservationCollection with solar energy and application.Solar selective heat-absorbing paint is a kind of functional coating, has high absorbance α in sunlight wavelength region, has low emissivity ε in low-temp radiating region.The thin film of solar energy density can being enriched with thus solar radiant energy being converted into heat energy by covering the surface formation one layer of heat collector, improving photo-thermal energy conversion efficiency.
Common solar energy heat absorbing coating, often that the absorbance of light is not high, photo-thermal conversion efficiency is low, to such an extent as to the practicality of heat collector is not high.Certainly, currently also have and be much devoted to improve the heat-absorbing paint research to the absorbance of sunlight.Such as, Chinese patent CN102286243B, the absorbance to sunlight is improved as optical absorbing agent using a kind of spinel type pigment, but it utilizes sol-gel auto-combustion preparation and calcines the black spinel type pigment obtained at a certain temperature, difference due to calcining heat, structure and the performance of product can be impacted, there is restricted and unstability；Also there is the heat-absorbing paint utilizing various nano-substance to prepare to improve coating to the absorbance of sunlight, but high cost, for instance Chinese patent CN103589275A.
[summary of the invention]
It is an object of the invention to: for above-mentioned Problems existing, a kind of solar paint that sunlight has high-absorbility is provided, by the important source material as this solar paint of the optical absorbing agent after processing by the simple method of novelty, make this solar paint that sunlight have high absorbance, weatherability is strong, long service life, and preparation technology is safe and simple, easily operated, there is bigger practicality.
To achieve these goals, the technical solution used in the present invention is as follows:
The solar energy heat absorbing coating that a kind of absorptivity is high, it is to be utilized sand mill dispersion mix homogeneously preparation to obtain by resin, optical absorbing agent, solvent and auxiliary agent by certain weight part ratio；Described resin, optical absorbing agent, solvent and auxiliary agent are calculated as according to ratio of weight and number: resin 55-75 part；Optical absorbing agent 35-45 part；Solvent 15-25 part；Auxiliary agent 3-8 part.
In the present invention, further, described resin is the one in modified polyurethane resin, modified organic silicone resin and modified epoxy resin.
In the present invention, further, described optical absorbing agent is formulated by certain weight part ratio by channel black, iron oxide black, red, modified phthalocyanine blue, Pulvis Talci and aluminium powder；Described channel black, iron oxide black, red, copper phthalocyanine blue, Pulvis Talci and aluminium powder are calculated as according to ratio of weight and number: channel black 35-40 part；Iron oxide black 30-35 part, red 8-12 part, modified phthalocyanine blue 20-25 part, Pulvis Talci 3-5 part and aluminium powder 4-8 part.
In the present invention, further, the preparation method of described modified phthalocyanine blue is: first take out phthalocyanine blue 15-20 part by weight, add the concentrated sulphuric acid of 40-50mL, after stirring 5-10min, heating is heated to reflux to 80-100 DEG C, sucking filtration while hot, with deionized water, filtrate is washed till pH=7, dry at 8-12 DEG C；Add dibutyl amine class copper phthalocyanine derivative thing 2-5 part and amino acid type surfactant 1-3 part more by ratio of weight and the number of copies, mix homogeneously, add the concentrated sulphuric acid of 50-70mL, after stirring 5-10min, after carrying out ultrasonic 10-15min with ultrasound wave, filter, at 8-12 DEG C after drying, regrinding, mix homogeneously, namely obtain the phthalocyanine blue modifiied.
In the present invention, further, the preparation method of described optical absorbing agent is: first, according to ratio of weight and number meter, by channel black, iron oxide black, red, modified phthalocyanine blue, Pulvis Talci and aluminium powder carry out Homogeneous phase mixing, and with sand mill sand milling 10-15 minute, control particle diameter and be 15-25 μm, it is subsequently adding the deionized water of 50-60mL, 3-5min is stirred with the mixing speed of 60-80r/min at 70-80 DEG C, non-shock chilling is to room temperature, sucking filtration, wash 3 times, add again the deionized water of 50-60mL, use centrifuge 3-5min, by the bulky grain except precipitation with outer portion sucking filtration once more, wash 3 times, at 60-80 DEG C, filtrate is dried, at 1000-1600 DEG C, filtrate is sintered, and the product after sintering is pulverized, sand milling, described optical absorbing agent can be obtained.
In the present invention, further, described solvent is the one in the mixture (volume ratio 9:1) of the mixture (volume ratio 9:1) of acetone and toluene, oxolane and toluene, ethyl acetate and phosphate mixture (volume ratio 9:1), and solvent is technical grade.
In the present invention, further, described auxiliary agent is defoamer, plasticizer and drier, and the weight part ratio of defoamer, plasticizer and drier is: 1-3:1-2:2-3.
Further, described defoamer is the one in polyoxyethylene polyoxypropylene tetramethylolmethane ether, polyoxyethylene polyoxy propanol amidogen ether, polypropylene glycerol aether and polyoxyethylene polyoxypropylene glycerin ether.
Further, described plasticizer is the one in diethyl phthalate and dibutyl phthalate.
Further, described drier is 2 kinds or 3 kinds in manganese dioxide naphthenic soap, cobalt naphthenic soap, plumbous naphthenic soap and manganese naphthenic soap.
The raw material related in this application and equipment all can obtain in buying on the market.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1. the present invention utilizes sand mill to carry out mixed grinding, and sand mill inner integument volume is little, and surface area is big, and the shearing point in wear smooth is more, particle is ground thinner, particle diameter all within 15-25 μm, good dispersion, without adding extra dispersant, save cost, improve efficiency.The optical absorbing agent ground in this approach, has high degree of scatter, has high tinting strength, tinting power, substantially increases the absorbing power to light.
2. the modified phthalocyanine blue that prepared by the present invention, is first heated backflow with concentrated sulphuric acid, improves its purity phthalocyanine blue, after utilize structure close and dibutyl amine class copper phthalocyanine derivative thing for alkalescence carries out surface treatment；Add again the amino acid type surfactant of alkalescence, carry out supersound process with ultrasound wave, add the surface activity of surfactant so that it is be more easy to low with polarity and for acidity phthalocyanine blue strong bonded；With dibutyl amine class copper phthalocyanine derivative thing and amino acid type surfactant, phthalocyanine blue is modified so that modified phthalocyanine blue has higher wettability and dispersibility, is more easy to by resin and wet with solvent, mix homogeneously than common phthalocyanine blue, has good anticoagulant wadding property.
2. the optical absorbing agent radiothermy district that prepared by the present invention absorbs the modified phthalocyanine blue of pigment and combines with long-wavelength region absorption pigment red, and add channel black, iron oxide black, both, Pulvis Talci and aluminium powder, it is made for black light-absorbing agent, and optical absorbing agent and resin also carry out proportioning according to certain part by weight 35%-45%, triplicity makes coating have high absorbance.The more important thing is, selected pigment mutually supplements in physical property, and aluminium powder can uv reflectance, iron oxide black has the ultraviolet ability of strong absorption, and both effects improve the ageing resistance of optical absorbing agent, strengthens the ruggedness of coating, increase the service life, high financial profit；And channel black can increase system viscosity, Pulvis Talci is possible to prevent coating sagging, in combination with the adhesive force and the adhesion strength that add with use surface so that coating is more easy to and heat collector surface strong bonded, solves easily and the problem come off by maxxaedium；Coating is made to have higher weatherability, long service life；It addition, selected optical absorbing agent raw material is respectively provided with stronger covering power, therefore under be combineding with each other so that the extinction efficiency of coating is greatly improved, and coating is made to have better stability and weatherability.
3. the present invention prepares the method for optical absorbing agent and coating and is physical process, and simple to operation, feasibility is high, and the coating prepared, and various physical properties are strong, have very big use value.
[detailed description of the invention]
Below in conjunction with embodiment, the present invention is further illustrated, but following embodiment is not used in the practical range of the restriction present invention.
Embodiment 1:
The solar paint that a kind of absorptivity is high, its raw material is:
Resin: modified polyurethane resin 55Kg；
Optical absorbing agent: use channel black 35Kg, iron oxide black 30Kg, red 8Kg, modified phthalocyanine blue 20Kg, Pulvis Talci 3Kg and aluminium powder 4Kg；
Solvent: the mixture (volume ratio 9:1) of acetone and toluene；
Auxiliary agent is defoamer, plasticizer and drier, wherein,
Defoamer: polyoxyethylene polyoxypropylene tetramethylolmethane ether 1Kg；
Plasticizer: diethyl phthalate 1Kg；
Drier: manganese dioxide naphthenic soap 1Kg, cobalt naphthenic soap 1Kg；
The step preparing the high solar energy heat absorbing coating of absorptivity according to above-mentioned raw material is as follows:
(1) taking out phthalocyanine blue 15Kg first by weight, add the concentrated sulphuric acid of 40mL, after stirring 5min, heating is heated to reflux to 80 DEG C, and filtrate is washed till pH=7 with deionized water by sucking filtration while hot, dry at 8 DEG C；Add dibutyl amine class copper phthalocyanine derivative thing 2Kg and amino acid type surfactant 1Kg more by ratio of weight and the number of copies, mix homogeneously, add the concentrated sulphuric acid of 50mL, after stirring 5min, after carrying out ultrasonic 10min with ultrasound wave, filter, at 8 DEG C after drying, regrinding, mix homogeneously, namely obtain the modified phthalocyanine blue of 20Kg.
(2) will according to ratio of weight and number channel black 35Kg, iron oxide black 30Kg, red 8Kg, modified phthalocyanine blue 20Kg, Pulvis Talci 3Kg and aluminium powder 5Kg carries out Homogeneous phase mixing, and with sand mill sand milling 10 minutes, controlling particle diameter is 15 μm, it is subsequently adding the deionized water of 50mL, 3min is stirred with the mixing speed of 60r/min at 70 DEG C, non-shock chilling is to room temperature, sucking filtration, wash 3 times, add again the deionized water of same volume, use centrifuge 3min, by the bulky grain except precipitation with outer portion sucking filtration once more, wash 3 times, at 60 DEG C, filtrate is dried, at 1000 DEG C, filtrate is sintered, and the product after sintering is pulverized, sand milling, described optical absorbing agent can be obtained.
(3) according to ratio of weight and number, resin, optical absorbing agent, solvent and auxiliary agent are put into operation 5min in sand mill, disperse mix homogeneously, the solar energy heat absorbing coating that absorptivity is high can be obtained.
Embodiment 2:
The solar paint that a kind of absorptivity is high, its raw material is:
Resin: modified polyurethane resin 65Kg；
Optical absorbing agent: use channel black 37Kg, iron oxide black 32Kg, red 10Kg, modified phthalocyanine blue 22Kg, Pulvis Talci 4Kg and aluminium powder 6Kg；
Solvent: the mixture (volume ratio 9:1) of oxolane and toluene；
Auxiliary agent is defoamer, plasticizer and drier, wherein,
Defoamer: polyoxyethylene polyoxy propanol amidogen ether 1Kg；
Plasticizer: dibutyl phthalate 1.5Kg；
Drier: plumbous naphthenic soap 1Kg, cobalt naphthenic soap 1Kg；
The step preparing the high solar energy heat absorbing coating of absorptivity according to above-mentioned raw material is as follows:
(1) taking out phthalocyanine blue 18Kg first by ratio of weight and the number of copies, add the concentrated sulphuric acid of 45mL, after stirring 8min, heating is heated to reflux to 90 DEG C, and filtrate is washed till pH=7 with deionized water by sucking filtration while hot, dry at 10 DEG C；Add dibutyl amine class copper phthalocyanine derivative thing 3Kg and amino acid type surfactant 2Kg more by ratio of weight and the number of copies, mix homogeneously, add the concentrated sulphuric acid of 60mL, after stirring 8min, after carrying out ultrasonic 12min with ultrasound wave, filter, at 10 DEG C after drying, regrinding, mix homogeneously, namely obtain the modified phthalocyanine blue of 22Kg.
(2) will according to ratio of weight and number channel black 37Kg, iron oxide black 32Kg, red 10Kg, modified phthalocyanine blue 22Kg, Pulvis Talci 4Kg and aluminium powder 6Kg carries out Homogeneous phase mixing, and with sand mill sand milling 12 minutes, controlling particle diameter is 20 μm, it is subsequently adding the deionized water of 55mL, 4min is stirred with the mixing speed of 70r/min at 75 DEG C, non-shock chilling is to room temperature, sucking filtration, wash 3 times, add again the deionized water of same volume, use centrifuge 4min, by the bulky grain except precipitation with outer portion sucking filtration once more, wash 3 times, at 70 DEG C, filtrate is dried, at 1200 DEG C, filtrate is sintered, and the product after sintering is pulverized, sand milling, described optical absorbing agent can be obtained.
(3) according to ratio of weight and number, resin, optical absorbing agent, solvent and auxiliary agent are put into operation 8min in sand mill, disperse mix homogeneously, the solar energy heat absorbing coating that absorptivity is high can be obtained.
Embodiment 3:
The solar paint that a kind of absorptivity is high, its raw material is:
Resin: modified polyurethane resin 75Kg；
Optical absorbing agent: use channel black 40Kg, iron oxide black 35Kg, red 12Kg, modified phthalocyanine blue 25Kg, Pulvis Talci 5Kg and aluminium powder 8Kg；
Solvent: ethyl acetate and phosphate mixture (volume ratio 9:1)；
Auxiliary agent is defoamer, plasticizer and drier, wherein,
Defoamer: polypropylene glycerol aether 3Kg；
Plasticizer: dibutyl phthalate 2Kg；
Drier: plumbous naphthenic soap 1Kg, cobalt naphthenic soap 1Kg, manganese dioxide naphthenic soap 1Kg；
The step preparing the high solar energy heat absorbing coating of absorptivity according to above-mentioned raw material is as follows:
(1) taking out phthalocyanine blue 20Kg first by ratio of weight and the number of copies, add the concentrated sulphuric acid of 50mL, after stirring 10min, heating is heated to reflux to 100 DEG C, and filtrate is washed till pH=7 with deionized water by sucking filtration while hot, dry at 12 DEG C；Add dibutyl amine class copper phthalocyanine derivative thing 3Kg and amino acid type surfactant 2Kg more by ratio of weight and the number of copies, mix homogeneously, add the concentrated sulphuric acid of 70mL, after stirring 10min, after carrying out ultrasonic 15min with ultrasound wave, filter, at 12 DEG C after drying, regrinding, mix homogeneously, namely obtain the modified phthalocyanine blue of 25Kg.
(2) will according to ratio of weight and number channel black 40Kg, iron oxide black 35Kg, red 12Kg, modified phthalocyanine blue 25Kg, Pulvis Talci 5Kg and aluminium powder 8Kg carries out Homogeneous phase mixing, and with sand mill sand milling 15 minutes, controlling particle diameter is 25 μm, it is subsequently adding the deionized water of 60mL, 5min is stirred with the mixing speed of 80r/min at 80 DEG C, non-shock chilling is to room temperature, sucking filtration, wash 3 times, add again the deionized water of same volume, use centrifuge 5min, by the bulky grain except precipitation with outer portion sucking filtration once more, wash 3 times, at 80 DEG C, filtrate is dried, at 1500 DEG C, filtrate is sintered, and the product after sintering is pulverized, sand milling, described optical absorbing agent can be obtained.
(3) according to ratio of weight and number, resin, optical absorbing agent, solvent and auxiliary agent are put into operation 12min in sand mill, disperse mix homogeneously, the solar energy heat absorbing coating that absorptivity is high can be obtained.
The solar energy heat absorbing coating that absorptivity prepared in embodiment 1-3 is high, direct spraying or brushing are on the heat sink metal layer surface absorbing heat glass tube with vacuum inner layer sheet surface or flat-plate solar collector at normal temperatures, before stenciling coating, need that glass or metal surface carry out clean process, metal surface reaches metal true qualities, and coating is stirred, then according to heat collector type brushing this coating thickness 50-160 μm of coating or thicker.
By above-mentioned application operating procedure step, to obtaining this coating solar energy heat absorbing coating that thickness is 60 μm and common black solar energy heat absorbing coating carries out technical specification verification test, test result is as shown in table 1:
As can be seen from the table, compared to common black solar energy heat absorbing coating, this solar energy heat absorbing coating is only small to absorbance and the emissivity of light, and the absorbance of light is greatly increased, up to more than 90%.Further, on the basis of high-absorbility, there is other excellent performance.
Claims (7)
1. the solar energy heat absorbing coating that an absorptivity is high, it is characterised in that it is to be utilized sand mill dispersion mix homogeneously preparation to obtain by resin, optical absorbing agent, solvent and auxiliary agent by certain weight part ratio；Described resin, solvent, auxiliary agent, optical absorbing agent are calculated as according to ratio of weight and number: resin 55-75 part；Optical absorbing agent 35-45 part；Solvent 15-25 part；Auxiliary agent 3-8 part.
2. the solar energy heat absorbing coating that a kind of absorptivity according to claim 1 is high, it is characterised in that described resin is the one in modified polyurethane resin, modified organic silicone resin and modified epoxy resin.
3. the solar energy heat absorbing coating that a kind of absorptivity according to claim 1 is high, it is characterised in that described optical absorbing agent is formulated by certain weight part ratio by channel black, iron oxide black, red, modified phthalocyanine blue, Pulvis Talci and aluminium powder；Described channel black, iron oxide black, red, modified phthalocyanine blue, Pulvis Talci and aluminium powder are calculated as according to weight part ratio: channel black 35-40 part；Iron oxide black 30-35 part, red 8-12 part, modified phthalocyanine blue 20-25 part, Pulvis Talci 3-5 part and aluminium powder 4-8 part.
4. optical absorbing agent according to claim 3, it is characterized in that, the preparation method of described modified phthalocyanine blue is: first take out phthalocyanine blue 15-20 part by weight, add the concentrated sulphuric acid of 40-50mL, after stirring 5-10min, heating is heated to reflux to 80-100 DEG C, sucking filtration while hot, with deionized water, filtrate is washed till pH=7, dry at 8-12 DEG C；Add dibutyl amine class copper phthalocyanine derivative thing 2-5 part and amino acid type surfactant 1-3 part more by ratio of weight and the number of copies, mix homogeneously, add the concentrated sulphuric acid of 50-70mL, after stirring 5-10min, after carrying out ultrasonic 10-15min with ultrasound wave, filter, at 8-12 DEG C after drying, regrinding, mix homogeneously, namely obtain the phthalocyanine blue modifiied.
5. optical absorbing agent according to claim 3, it is characterized in that, the preparation method of described optical absorbing agent is: first, according to ratio of weight and number meter, by channel black, iron oxide black, red, modified phthalocyanine blue, Pulvis Talci and aluminium powder carry out Homogeneous phase mixing, and with sand mill sand milling 10-15 minute, control particle diameter and be 15-25 μm, it is subsequently adding the deionized water of 50-60mL, 3-5min is stirred with the mixing speed of 60-80r/min at 70-80 DEG C, non-shock chilling is to room temperature, sucking filtration, wash 3 times, add again the deionized water of 50-60mL, use centrifuge 3-5min, by the bulky grain except precipitation with outer portion sucking filtration once more, wash 3 times, at 60-80 DEG C, filtrate is dried, under 1000-1600 DEG C of condition, filtrate is sintered, and the product after sintering is pulverized, sand milling, optical absorbing agent can be obtained.
6. the solar energy heat absorbing coating that a kind of absorptivity according to claim 1 is high, it is characterized in that, described solvent is the one in the mixture (volume ratio 1:9) of the mixture (volume ratio 1:9) of acetone and toluene, oxolane and toluene, ethyl acetate and phosphate mixture (volume ratio 1:9), and solvent is technical grade.
7. the solar energy heat absorbing coating that a kind of absorptivity according to claim 1 is high, it is characterised in that described auxiliary agent is defoamer, plasticizer and drier, the weight part ratio of defoamer, plasticizer and drier is: 1-3:1-2:2-3.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106752915A (en) * | 2016-12-14 | 2017-05-31 | 上海电力学院 | A kind of nano level metal ceramic solar heat absorbing coating material and preparation method thereof |
| CN109439092A (en) * | 2018-11-14 | 2019-03-08 | 安徽兆拓新能源科技有限公司 | A kind of solar panel heat-absorbing paint and preparation method thereof |
| CN113354974A (en) * | 2021-07-09 | 2021-09-07 | 广州特种承压设备检测研究院 | Black paint and preparation method thereof |
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|---|---|---|---|---|
| CN102134428A (en) * | 2010-12-31 | 2011-07-27 | 西安利澳科技股份有限公司 | Solar-absorbing coating |
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| CN105482603A (en) * | 2016-02-03 | 2016-04-13 | 广西超星太阳能科技有限公司 | Flat plate solar energy heat absorption coating |
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