CN102924990A - Transparent antireflection coating liquid and preparation method and application thereof - Google Patents
Transparent antireflection coating liquid and preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to transparent antireflection coating liquid and a preparation method and application thereof. The coating liquid is prepared by mixing the following components in part by weight: 1 to 10 parts of nano slurry, 1 to 10 parts of film-forming material, 0.1 to 1 part of auxiliary and 80 to 98 parts of solvent. The coating liquid is coated on glass and after the glass is baked for 2 to 15 minutes at a temperature of 300 to 720 DEG C, antireflection coated glass can be obtained; and the visible light transmittance of the glass can be improved by over 3 percent. Compared with the prior art, the transparent antireflection coating liquid can be applied to preparation on the antireflection glass of a solar cell cover board so as to effectively improve the light transmittance of the glass and fulfill the aim of improving the power generation power of a solar cell.
Description
Technical field
The present invention relates to chemical industry, material and field of Environment Protection, is about a kind of antireflective coating liquid and preparation method thereof.The antireflective coating liquid has good sticking power with glass, and can reduce the reflectivity of glass after film forming on glass, improves the visible light transmissivity of glass.The coated glass that adopts this coating liquid to make is applied on the solar covering, reaches the purpose that improves solar cell power generation power.
Background technology
Glass material (sheet material, tubing) is indispensable important materials in present solar water heater industry and the photovoltaic industry.In the situation that solar energy optical-thermal, photoelectric transformation efficiency be progressively near theoretical limit, the energy transformation ratio of every raising one percentage point all will be paid larger cost, and has difficulty in taking a step, and glass still has the space that can improve the solar transmission ratio.Therefore reduce the reflectivity of glass material, improve transmittance, to energy conversion efficiency positive effect without being suspected to have reality of further raising solar product.
The main sol-gel method that adopts is produced anti-reflection liquid both at home and abroad at present., CN201336310, CN201336311 and CN1336312 be that typical sol-gel method prepares anti-reflection liquid; CN101318776 is take collosol and gel as raw material, by its surface modification is obtained anti-reflection liquid; CN101308878 prepares anti-reflection liquid with the inorganic materials that is dissolved in organic solvent as starting material, can confirm that from the method selected inorganic materials also is the sol-gel method preparation, otherwise inorganic powder can't be dissolved in organic solvent; But there is a more serious problem in sol gel process, collosol and gel generally is in metastable state, be subjected to various factors in the preparation process, add the control difficulty of parameter tuning of coating process, therefore quality product can't be stablized, glass production producer needs additive method to obtain the stable coated glass technique of anti-reflection rate, the stability of guaranteeing batch.Therefore select new method to obtain antireflective effect and seem very necessary.The present invention with special nano-dispersed technique, prepares nano dispersion fluid directly from powder, then add filmogen, acquisition has the anti-reflection liquid of antireflective effect, and greater than more than 3%, and technology stability improves greatly in the anti-reflection rate of coatings on the ultra-clear glasses.Although CN102326099 has adopted nano particle, it is that using plasma etches away nanodispersed phase to form nanostructure (or nanoporous) surface, directly adopts porous powder to compare with the present invention, needs to increase extras and treatment process.
Summary of the invention
Purpose of the present invention is exactly to provide a kind of loose porous powder is ground by special grinding plant to make corresponding nano pulp for the defective that overcomes above-mentioned prior art existence, the dispersion energy of powder in slurry reaches nano level (10-200nm), and energy stable dispersion, the solvent of its slurry mates with the solvent phase of the filmogen of preparing, so transparent antireflective coating liquid of the stability of the coating liquid of assurance preparation and its preparation method and application.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of transparent antireflective coating liquid is mixed to get by the component of following weight part content: nano pulp 1～10, filmogen 1～10, auxiliary agent 0.1～1, solvent 80～98.
The solid content of described nano pulp is 5～25wt%, and the size distribution of nano pulp is at 10～200nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment.
Preferred 50～the 150nm of the particle diameter of described nano pulp.
Described nano pulp is mixed to get by the component of following weight part content: nano-powder 5～25, wetting agent 2～25, hyper-dispersant 2～25, dispersion medium 25～91.
Described nano-powder be initial size at the loose porous powder of 5～100 nanometers, comprise silicon carbide, titanium dioxide, the gas-phase silica or alumina powder jointed of vapor phase process or precipitator method preparation, or aerogel; Because selected nano-powder has loose porous characteristic, cause the specific refractory power of loose porous coatings far below the specific refractory power (1.52) of ultra-clear glasses, under appropriate thickness of coating, can reduce the visible reflectance of glass surface, thus the transmittance of Effective Raise glass.
Described wetting agent and hyper-dispersant have group anchoring and sterically hindered stable dual function, and wherein, described wetting agent is polyprotonic acid polymkeric substance, modified poly ester class, polyoxyethylene, and consumption accounts for 40～200wt% of nano-powder gross weight.
Described hyper-dispersant is modified polyacrylate, modified poly ester class dispersion agent or fatty amines dispersion agent, and consumption accounts for 40～200wt% of nano-powder gross weight.
Described dispersion medium adopts aqueous dispersion medium or solvent borne dispersion agent according to the resin system of selected filmogen, is selected from water, ethanol, butanols, dimethylbenzene or the N-BUTYL ACETATE one or more.
Described filmogen has the resin of better sticking power to glass for choosing, comprise polyacrylic resin, urethane resin, Synolac, aminoresin, polyester, silicone resin, inorganic silicate or its aqueous liquid dispersion or emulsion.
For solvent type resin such as polyacrylic resin, urethane resin, Synolac, aminoresin, polyester, silicone resin, solvent that suitable coating liquid uses, flow agent, defoamer, adhesion promoter etc. be can add and single component or two-pack transparent varnish are deployed into, resin such as organic silicone resin of preferred good weatherability, consumption accounts for the 1-10wt% of coating liquid gross weight.
Described auxiliary agent is selected from one or more in dispersion agent, wetting agent, flow agent or the thickening material.
Described solvent is selected according to the resin system of selected filmogen, is selected from water, ethanol, butanols, propylene glycol, dimethylbenzene, N-BUTYL ACETATE, acetone or the methylpent hexanone one or more.
A kind of preparation method of transparent antireflective coating liquid may further comprise the steps:
(1) preparation of nano slurry
A, get the raw materials ready by following ingredients weight parts content: nano-powder 5～25, wetting agent 2～25, hyper-dispersant 2～25, dispersion medium 25～91;
B, said components is mixed, grinds after evenly by ultra-sonic dispersion and obtain nano pulp, nano pulp solid content be 5～25wt%, size distribution is at 10～200nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment;
(2) the transparent antireflective coating liquid of preparation:
A, get the raw materials ready by following ingredients weight parts content: nano pulp 1～10, filmogen 1～10, auxiliary agent 0.1～1, solvent 80～98;
B, said components is fully mixed, i.e. preparation obtains transparent antireflective coating liquid.
A kind of application of transparent antireflective coating liquid directly is coated in transparent antireflective coating liquid on glassly, and coating liquid has good sticking power to glass surface.
A kind of application of transparent antireflective coating liquid, adopt the method for showering, dip-coating, spraying or roller coat evenly to be coated in the antireflective coating liquid on glass, then through 2～15 minutes drying and forming-films of 300～720 ℃ of bakings, obtain antireflecting coated glass, can effectively reduce the visible reflectance of glass.
Compared with prior art, the present invention is by selecting loose porous powder, and initial size is dispersed into nano dispersion fluid in 5～100 nanometers with these powders in coordinative solvent, and adds filmogen, prepares the coating liquid with anti-reflection function.Because selected powder has loose porous characteristic, cause the specific refractory power of loose porous coatings far below the specific refractory power (1.52) of ultra-clear glasses, under appropriate thickness of coating, can reduce the visible reflectance of glass surface, thereby the transmittance of Effective Raise glass reaches the purpose that increases solar cell power generation power.
Description of drawings
Fig. 1 is the nano pulp size distribution figure that embodiment 1 prepares;
Fig. 2 is the nano pulp size distribution figure that embodiment 2 prepares;
Fig. 3 is the variation of visible light transmittance rate before and after embodiment 3 films;
Fig. 4 is the variation of visible light transmittance rate before and after embodiment 4 films.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
The used analysis and characterization instrument of the present invention is as follows:
The size distribution test: the laser particle tester by the Coulter N4 Plus of U.S. Beckman company is measured;
Transmission measurement: measured by the Japanese HITACHI U-4100 of company ultraviolet/Vis/NIR instrument.
The preparation of aqueous functional nano pulp:
Wetting agent, defoamer and hyper-dispersant are added to the water first, after stirring, under stirring, middling speed adds above-mentioned powder, after these powders mixed in water, sand milling was 4 hours in sand mill, obtains the slurry about median size 81nm, its size distribution figure as shown in Figure 1, as can be seen from the figure, the median size of nano pulp is 80.97nm, dispersion coefficient P.I=0.149.
Embodiment 2
The preparation of solvent borne function nano slurry:
Join first wetting agent (ByK 104s) and hyper-dispersant (Hyperdisper-5410) in the ethanol, after stirring, under stirring, middling speed adds above-mentioned powder, after these powders mixed in solvent, sand milling was 6 hours in sand mill, obtains the slurry about median size 58nm, its size distribution figure as shown in Figure 2, as can be seen from the figure, the median size of nano pulp is 58.33nm, dispersion coefficient P.I=0.171.
Embodiment 3
The preparation of aqueous transparent antireflective coating liquid:
Above-mentioned materials is added by the prescription consumption, stir with dispersion machine, obtain the varnish of certain viscosity.
Above-mentioned water varnish and embodiment 1 waterborne nano slurry are mixed in 100: 40 ratio, then add 1400 water, being sprayed on transmittance is on 89.5% glass baseplate, behind its surface drying, obtain the Clear coating that film thickness is 120 nanometers through 550 ℃ of bakings of 15 minutes again, transmittance is 92.6% after measured, film before and after visible light transmittance rate variation as shown in Figure 3, transmittance has increased by 3.1%.
Embodiment 4
The transparent antireflective coating liquid of solvent borne material preparation:
Said components is mixed, it is on 89.5% glass baseplate that roller coat is coated in transmittance, behind its surface drying, obtain the Clear coating that film thickness is 120 nanometers through 700 ℃ of bakings of 3 minutes again, transmittance is 92.5% after measured, film before and after visible light transmittance rate variation as shown in Figure 4, transmittance has increased by 3.0%.
A kind of transparent antireflective coating liquid, component by following content is mixed to get: nano pulp 1kg, filmogen 1kg, auxiliary agent 0.1kg, solvent 80kg, wherein, the solid content of nano pulp is 5wt%, the size distribution of nano pulp is at 10～200nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment.Adopt flow agent as auxiliary agent, ethanol is as solvent.
Nano pulp is mixed to get by the component of following content: nano-powder 5kg, wetting agent 2kg, hyper-dispersant 2kg, dispersion medium 25kg.Employed nano-powder is that initial size is at the loose porous powder of 5～100 nanometers, what the application adopted is the silicon carbide of vapor phase process or precipitator method preparation, because selected nano-powder has loose porous characteristic, cause the specific refractory power of loose porous coatings far below the specific refractory power (1.52) of ultra-clear glasses, under appropriate thickness of coating, can reduce the visible reflectance of glass surface, thus the transmittance of Effective Raise glass.Wetting agent and hyper-dispersant have group anchoring and sterically hindered stable dual function, and wherein, wetting agent is the polyprotonic acid polymkeric substance, and hyper-dispersant is modified polyacrylate.Dispersion medium adopts ethanol according to the resin system of selected filmogen, and filmogen has the polyacrylic resin of better sticking power to glass for choosing.
The preparation method of transparent antireflective coating liquid may further comprise the steps:
(1) preparation of nano slurry
A, get the raw materials ready by following component concentration: nano-powder 5kg, wetting agent 2kg, hyper-dispersant 2kg, dispersion medium 25kg;
B, said components is mixed, grinds after evenly by ultra-sonic dispersion and obtain nano pulp, nano pulp solid content be 5wt%, size distribution is at 10～200nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment;
(2) the transparent antireflective coating liquid of preparation:
A, get the raw materials ready by following component concentration: nano pulp 1kg, filmogen 1kg, auxiliary agent 0.1kg, solvent 80kg;
B, said components is fully mixed, i.e. preparation obtains transparent antireflective coating liquid.
The transparent antireflective coating liquid of this kind can directly be coated on glass, and coating liquid has good sticking power to glass surface.
Embodiment 6
A kind of transparent antireflective coating liquid, component by following content is mixed to get: nano pulp 5kg, filmogen 5kg, auxiliary agent 0.5kg, solvent 90kg, wherein, the solid content of nano pulp is 20wt%, the size distribution of nano pulp is at 50nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment.Adopt thickening material as auxiliary agent, dimethylbenzene is as solvent.
Nano pulp is mixed to get by the component of following content: nano-powder 20kg, wetting agent 10kg, hyper-dispersant 10kg, dispersion medium 80kg.Employed nano-powder is that initial size is at the loose porous powder of 5～100 nanometers, what the application adopted is the gas-phase silica of vapor phase process preparation, because selected nano-powder has loose porous characteristic, cause the specific refractory power of loose porous coatings far below the specific refractory power (1.52) of ultra-clear glasses, under appropriate thickness of coating, can reduce the visible reflectance of glass surface, thus the transmittance of Effective Raise glass.Wetting agent and hyper-dispersant have group anchoring and sterically hindered stable dual function, and wherein, wetting agent is the polyprotonic acid polymkeric substance, and hyper-dispersant is modified polyacrylate.Dispersion medium adopts ethanol according to the resin system of selected filmogen, and filmogen has the polyacrylic resin of better sticking power to glass for choosing.
The preparation method of transparent antireflective coating liquid may further comprise the steps:
(1) preparation of nano slurry
A, get the raw materials ready by following component concentration: nano-powder 20kg, wetting agent 10kg, hyper-dispersant 10kg, dispersion medium 80kg;
B, said components is mixed, grinds after evenly by ultra-sonic dispersion and obtain nano pulp, nano pulp solid content be 20wt%, size distribution is at 50nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment;
(2) the transparent antireflective coating liquid of preparation:
A, get the raw materials ready by following component concentration: nano pulp 5kg, filmogen 5kg, auxiliary agent 0.5kg, solvent 90kg;
B, said components is fully mixed, i.e. preparation obtains transparent antireflective coating liquid.
Transparent antireflective coating liquid can adopt the method for showering, dip-coating, spraying or roller coat evenly to be coated in the antireflective coating liquid on glass, then through 15 minutes drying and forming-films of 300 ℃ of bakings, obtain antireflecting coated glass, can effectively reduce the visible reflectance of glass.
Embodiment 7
A kind of transparent antireflective coating liquid, component by following content is mixed to get: nano pulp 10kg, filmogen 10kg, auxiliary agent 1kg, solvent 98kg, wherein, the solid content of nano pulp is 25wt%, the size distribution of nano pulp is at 150nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment.Adopt thickening material as auxiliary agent, water is as solvent.
Nano pulp is mixed to get by the component of following content: nano-powder 25kg, wetting agent 25kg, hyper-dispersant 25kg, dispersion medium 91kg.Employed nano-powder is that initial size is at the loose porous powder of 5～100 nanometers, what the application adopted is the titanium dioxide of vapor phase process preparation, because selected nano-powder has loose porous characteristic, cause the specific refractory power of loose porous coatings far below the specific refractory power (1.52) of ultra-clear glasses, under appropriate thickness of coating, can reduce the visible reflectance of glass surface, thus the transmittance of Effective Raise glass.Wetting agent and hyper-dispersant have group anchoring and sterically hindered stable dual function, and wherein, wetting agent is modified poly ester, and hyper-dispersant is the fatty amines dispersion agent.Dispersion medium adopts ethanol according to the resin system of selected filmogen, and filmogen has the aminoresin of better sticking power to glass for choosing.
The preparation method of transparent antireflective coating liquid may further comprise the steps:
(1) preparation of nano slurry
A, get the raw materials ready by following component concentration; Nano-powder 25kg, wetting agent 25kg, hyper-dispersant 25kg, dispersion medium 91kg;
B, said components is mixed, grinds after evenly by ultra-sonic dispersion and obtain nano pulp, nano pulp solid content be 25wt%, size distribution is at 150nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment;
(2) the transparent antireflective coating liquid of preparation:
A, get the raw materials ready by following component concentration: nano pulp 10kg, filmogen 10kg, auxiliary agent 1kg, solvent 98kg;
B, said components is fully mixed, i.e. preparation obtains transparent antireflective coating liquid.
Transparent antireflective coating liquid can adopt the method for showering, dip-coating, spraying or roller coat evenly to be coated in the antireflective coating liquid on glass, then through 2 minutes drying and forming-films of 720 ℃ of bakings, obtain antireflecting coated glass, can effectively reduce the visible reflectance of glass.
Claims (10)
1. a transparent antireflective coating liquid is characterized in that, this coating liquid is mixed to get by the component of following weight part content: nano pulp 1～10, filmogen 1～10, auxiliary agent 0.1～1, solvent 80～98.
2. a kind of transparent antireflective coating liquid according to claim 1 is characterized in that, the solid content of described nano pulp is 5～25wt%, and the size distribution of nano pulp is at 10～200nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment.
3. a kind of transparent antireflective coating liquid according to claim 2 is characterized in that the preferred 50～150nm of the particle diameter of described nano pulp.
4. a kind of transparent antireflective coating liquid according to claim 2 is characterized in that, described nano pulp is mixed to get by the component of following weight part content: nano-powder 5～25, wetting agent 2～25, hyper-dispersant 2～25, dispersion medium 25～91;
Described nano-powder be initial size at the loose porous powder of 5～100 nanometers, comprise silicon carbide, titanium dioxide, the gas-phase silica or alumina powder jointed of vapor phase process or precipitator method preparation, or aerogel;
Described wetting agent is polyprotonic acid polymkeric substance, modified poly ester or polyoxyethylene, and consumption accounts for 40～200wt% of nano-powder gross weight;
Described hyper-dispersant is modified polyacrylate, modified poly ester class dispersion agent or fatty amines dispersion agent, and consumption accounts for 40～200wt% of nano-powder gross weight;
Described dispersion medium adopts aqueous dispersion medium or solvent borne dispersion agent according to the resin system of selected filmogen, is selected from water, ethanol, butanols, dimethylbenzene or the N-BUTYL ACETATE one or more.
5. a kind of transparent antireflective coating liquid according to claim 1, it is characterized in that, described filmogen has the resin of better sticking power to glass for choosing, comprise polyacrylic resin, urethane resin, Synolac, aminoresin, polyester, silicone resin, inorganic silicate or its aqueous liquid dispersion or emulsion.
6. a kind of transparent antireflective coating liquid according to claim 1 is characterized in that, described auxiliary agent is selected from one or more in dispersion agent, wetting agent, flow agent or the thickening material.
7. a kind of transparent antireflective coating liquid according to claim 1, it is characterized in that, described solvent is selected according to the resin system of selected filmogen, is selected from water, ethanol, butanols, propylene glycol, dimethylbenzene, N-BUTYL ACETATE, acetone or the methylpent hexanone one or more.
8. the preparation method of a transparent antireflective coating liquid as claimed in claim 1 is characterized in that, the method may further comprise the steps:
(1) preparation of nano slurry
A, get the raw materials ready by following ingredients weight parts content: nano-powder 5～25, wetting agent 2～25, hyper-dispersant 2～25, dispersion medium 25～91;
B, said components is mixed, grinds after evenly by ultra-sonic dispersion and obtain nano pulp, nano pulp solid content be 5～25wt%, size distribution is at 10～200nm, through 5 minutes 5000 rev/mins of high speed centrifugations without obvious sediment;
(2) the transparent antireflective coating liquid of preparation:
A, get the raw materials ready by following ingredients weight parts content: nano pulp 1～10, filmogen 1～10, auxiliary agent 0.1～1, solvent 80～98;
B, said components is fully mixed, i.e. preparation obtains transparent antireflective coating liquid.
9. the application of a transparent antireflective coating liquid as claimed in claim 1 is characterized in that, transparent antireflective coating liquid directly is coated on glass, and coating liquid has good sticking power to glass surface.
10. the application of a transparent antireflective coating liquid as claimed in claim 1, it is characterized in that, adopt the method for showering, dip-coating, spraying or roller coat evenly to be coated in the antireflective coating liquid on glass, then through 2～15 minutes drying and forming-films of 300～720 ℃ of bakings, obtain antireflecting coated glass, can effectively reduce the visible reflectance of glass.
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Application publication date: 20130213 |