WO2000006300A1 - Method for producing high-performance material having photocatalytic function and device therefor - Google Patents
Method for producing high-performance material having photocatalytic function and device therefor Download PDFInfo
- Publication number
- WO2000006300A1 WO2000006300A1 PCT/JP1999/004126 JP9904126W WO0006300A1 WO 2000006300 A1 WO2000006300 A1 WO 2000006300A1 JP 9904126 W JP9904126 W JP 9904126W WO 0006300 A1 WO0006300 A1 WO 0006300A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- metal oxide
- photocatalytic
- coating composition
- substrate
- heating
- Prior art date
Links
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 239000012761 high-performance material Substances 0.000 title abstract 4
- 238000010438 heat treatment Methods 0.000 claims abstract description 137
- 239000000463 material Substances 0.000 claims abstract description 97
- 239000008199 coating composition Substances 0.000 claims abstract description 82
- 229910044991 metal oxide Inorganic materials 0.000 claims abstract description 67
- 150000004706 metal oxides Chemical class 0.000 claims abstract description 67
- 238000000034 method Methods 0.000 claims abstract description 50
- 239000002243 precursor Substances 0.000 claims abstract description 42
- 239000000758 substrate Substances 0.000 claims description 102
- 239000011941 photocatalyst Substances 0.000 claims description 45
- 239000002585 base Substances 0.000 claims description 39
- 238000000576 coating method Methods 0.000 claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 35
- 239000002184 metal Substances 0.000 claims description 35
- 239000011248 coating agent Substances 0.000 claims description 34
- 239000000203 mixture Substances 0.000 claims description 26
- -1 platinum group metals Chemical class 0.000 claims description 21
- 239000011230 binding agent Substances 0.000 claims description 20
- 239000002245 particle Substances 0.000 claims description 19
- 239000002904 solvent Substances 0.000 claims description 19
- 238000001816 cooling Methods 0.000 claims description 18
- 238000001035 drying Methods 0.000 claims description 17
- 239000011521 glass Substances 0.000 claims description 17
- 229910052710 silicon Inorganic materials 0.000 claims description 16
- 239000008204 material by function Substances 0.000 claims description 15
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- 150000001875 compounds Chemical class 0.000 claims description 10
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- 239000007787 solid Substances 0.000 claims description 10
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 9
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- 230000015572 biosynthetic process Effects 0.000 description 1
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- 239000005416 organic matter Substances 0.000 description 1
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- 239000003002 pH adjusting agent Substances 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- FABOKLHQXVRECE-UHFFFAOYSA-N phenyl(tripropoxy)silane Chemical compound CCCO[Si](OCCC)(OCCC)C1=CC=CC=C1 FABOKLHQXVRECE-UHFFFAOYSA-N 0.000 description 1
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- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
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- WFIZEGIEIOHZCP-UHFFFAOYSA-M potassium formate Chemical compound [K+].[O-]C=O WFIZEGIEIOHZCP-UHFFFAOYSA-M 0.000 description 1
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- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
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- 229910000077 silane Inorganic materials 0.000 description 1
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- HLBBKKJFGFRGMU-UHFFFAOYSA-M sodium formate Chemical compound [Na+].[O-]C=O HLBBKKJFGFRGMU-UHFFFAOYSA-M 0.000 description 1
- 235000019254 sodium formate Nutrition 0.000 description 1
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- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
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- 230000002588 toxic effect Effects 0.000 description 1
- GYZQBXUDWTVJDF-UHFFFAOYSA-N tributoxy(methyl)silane Chemical compound CCCCO[Si](C)(OCCCC)OCCCC GYZQBXUDWTVJDF-UHFFFAOYSA-N 0.000 description 1
- INUOIYMEJLOQFN-UHFFFAOYSA-N tributoxy(phenyl)silane Chemical compound CCCCO[Si](OCCCC)(OCCCC)C1=CC=CC=C1 INUOIYMEJLOQFN-UHFFFAOYSA-N 0.000 description 1
- WAAWAIHPWOJHJJ-UHFFFAOYSA-N tributoxy(propyl)silane Chemical compound CCCCO[Si](CCC)(OCCCC)OCCCC WAAWAIHPWOJHJJ-UHFFFAOYSA-N 0.000 description 1
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 description 1
- YNJBWRMUSHSURL-UHFFFAOYSA-N trichloroacetic acid Chemical compound OC(=O)C(Cl)(Cl)Cl YNJBWRMUSHSURL-UHFFFAOYSA-N 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- DAOVYDBYKGXFOB-UHFFFAOYSA-N tris(2-methylpropoxy)alumane Chemical compound [Al+3].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-] DAOVYDBYKGXFOB-UHFFFAOYSA-N 0.000 description 1
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- 238000003911 water pollution Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
- B01J35/39—Photocatalytic properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/22—Surface treatment of glass, not in the form of fibres or filaments, by coating with other inorganic material
- C03C17/23—Oxides
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5041—Titanium oxide or titanates
-
- 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
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C30/00—Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/212—TiO2
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/20—Materials for coating a single layer on glass
- C03C2217/21—Oxides
- C03C2217/229—Non-specific enumeration
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2217/00—Coatings on glass
- C03C2217/70—Properties of coatings
- C03C2217/71—Photocatalytic coatings
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2218/00—Methods for coating glass
- C03C2218/30—Aspects of methods for coating glass not covered above
- C03C2218/32—After-treatment
-
- 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
- C04B2111/2061—Materials containing photocatalysts, e.g. TiO2, for avoiding staining by air pollutants or the like
Definitions
- the present invention relates to a method for producing a functional material having a photocatalytic function exhibiting an anti-bactericidal function, a deodorizing function, and an antifouling function, which is excellent in wastewater treatment and purification of harmful gases, and an apparatus therefor.
- Light is attracting attention as a substance that exerts a function of promoting the decomposition (oxidation) of organic compounds such as fungi, molds, and odorous components by irradiating them with light, causing adsorption or desorption of oxygen molecules. ing. Many attempts have been made to clean the surface by fixing the photocatalyst to the substrate surface.
- PCT / WO96 / 293375 discloses that the surface of a photocatalyst-containing layer formed on the surface of a substrate has a high degree of hydrophilicity (for example, with water) (Converted to a contact angle of 10 ° or less). By utilizing this property, it is said that it is possible to improve the anti-fog and visibility enhancement of transparent members such as glass, lenses and mirrors, and to improve the water washability and rainfall washability of the product surface.
- the production of functional materials utilizing such photocatalytic functions is performed by preparing a coating solution containing a photocatalytic metal oxide or a precursor thereof, applying the coating solution, and drying or sintering the coating solution.
- a coating solution containing a photocatalytic metal oxide or a precursor thereof for example, titanium alkoxide and alcohol amines Toka et prepared titania sol or T i 0 2, Z n O ,, S r T i O. It is manufactured by applying a sol prepared by dispersing particles such as particles in an aqueous solvent to the surface of a substrate, and drying or sintering. More specifically, it is disclosed in the specification of Patent No. 2517874. As shown, after coating the titania sol on the substrate, the temperature was gradually increased from room temperature to 600. It is manufactured by heating and raising the temperature to a final temperature of C to 700 ° C., followed by firing to fix the photocatalyst.
- the present inventors have now found that a functional material having sufficient light and function can be efficiently manufactured by rapid heating. It was also found that by performing this rapid heating continuously immediately after the production of the base material, it is possible to produce a functional material having light and functions more efficiently.
- the present invention is based on this finding.
- an object of the present invention is to provide a method capable of manufacturing a functional material having sufficient light and function having sufficient performance and an apparatus therefor.
- the method for producing a functional material having a photocatalytic function according to the present invention comprises:
- a photocatalytic coating composition containing a photocatalytic metal oxide and / or a precursor thereof is applied to a substrate surface
- the method includes rapidly heating the surface of the base material to fix the light and the metal oxide on the surface of the base material.
- the apparatus for producing a functional material having a photocatalytic function according to the present invention includes:
- Coating means for coating a photocatalytic coating composition containing a photocatalytic metal oxide and a photocatalyst or a precursor thereof on a substrate surface
- Heating means for rapidly heating the surface of the base material and fixing the light and the metal oxide to the surface of the base material
- ADVANTAGE OF THE INVENTION while being able to fix a photocatalytic metal oxide to a base-material surface reliably in a short time, surface smoothness is high, photocatalytic function is excellent, and abrasion resistance, A functional material with excellent chemical resistance can be obtained.
- the manufacturing apparatus can be reduced in size, which simplifies the manufacturing process and saves space. Furthermore, by shortening the time required for heating, it is possible to obtain an advantage that cost can be reduced and generated exhaust gas can be reduced. [Brief description of drawings]
- FIGS. 1 (a) and 1 (b) are explanatory views of a method for producing a functional material having a photocatalytic function according to the present invention.
- the light and coating composition layer 2a applied to the substrate 1 becomes a thin film 2b that imparts a photocatalytic function to the substrate 1 by rapid heating.
- FIGS. 2A and 2B are explanatory diagrams of a method for producing a functional material having a solvent function according to the present invention.
- the light applied to the substrate 1, the layer 2 a of the coating composition, and the layer 4 a composed of the binder and ⁇ j are formed by a thin film 2 b that imparts a luminous function to the substrate 1 by rapid heating.
- the layer 4a becomes the layer 4b having non-crosslinking oxygen and contributing to exhibiting hydrophilicity.
- FIG. 3 is an explanatory view of a functional material manufacturing apparatus according to the present invention.
- the equipment shown in the figure is composed of a molding device 5, a glaze device 6, and a baking device 7 that first produce so-called pottery as a base material, a photocatalyst coating composition coating device 8, a rapid heating device 9, and a cooling zone 1.
- the apparatus according to the present invention further includes a transfer device 16 which is continuously connected to the device according to the present invention, and which can continuously transfer the base material within each device and between the devices.
- FIG. 4 is a diagram schematically showing the structure of the rapid heating device 9 in FIG.
- the rapid heating device 9 holds the heating element 21, a heat-resistant material 22 that covers the heating element and forms a heating space, and a base material 23 to be heated in the heating space and in the direction of arrow A in the figure.
- Transport means 16 for transporting the substrate to the heating space; and a carry-in port 24 and a carry-out port 25 for carrying the substrate into and out of the heating space.
- FIG. 5 shows an apparatus provided with a preheating device 11 for preheating the substrate surface before applying the photocatalytic coating composition and a drying device 12 for drying the substrate on which the composition has been applied.
- the present invention is a method for producing a functional material having a photocatalytic function.
- the functions imparted to the substrate by having a photocatalytic function include various functional capabilities, such as hydrophilicity, antibacterial properties, antifouling properties, antialgal properties, antifogging properties, NOX purification, and antistatic functions.
- the “functional material” produced by the method according to the present invention means a material that has been provided with a photocatalytic function and has at least one of the various functions described above.
- the “substrate” to which the method according to the present invention can be applied include metals, inorganic materials, organic materials and composite materials thereof, and specifically, interior materials, exterior materials, tiles, sanitary materials, and the like. Examples include building materials such as pottery, food gaical plates, cement extruded plates or ceramic substrates, new ceramics such as semiconductors, insulators, glass, mirrors, wood, and resins.
- a photocatalytic coating composition material to be applied to the above-mentioned material (2) is prepared.
- the photocatalyst coating composition used in the method according to the invention comprises light, a metal oxide and a precursor or a precursor thereof.
- the photometal oxide refers to a valence band when irradiated with light (excitation light) having an energy larger than the energy gap between the conduction band and the valence band of the crystal (ie, shorter wavelength).
- Excitation of electrons inside (photoexcitation) A substance that can be generated strongly to generate conduction electrons and holes.
- photocatalytic metal oxide preferably, T i ⁇ 2, Z n 0, S N_ ⁇ 2, S r T i 0. , W0 3 , B i 20 . , Fe. 0 3 , and V 2 ⁇ “are selected from the group consisting of
- the photocatalytic coating composition may include a precursor of a photocatalytic metal oxide.
- the precursor of the photocatalytic metal oxide means a precursor which becomes the above-mentioned photocatalytic metal oxide by rapid heating described later.
- such a precursor is at least one metal selected from the group consisting of Ti, Zn, Sn, Sr, W, Bi, Fe, and V. And a compound that becomes a corresponding metal oxide by rapid heating described below.
- the photocatalyst coating composition comprises a binder -Powerful taste, further comprising.
- the addition of the binder is advantageous because the light-sensitive metal oxide can be more firmly fixed to the substrate surface.
- Preferred specific examples of the binder are selected from the group consisting of inorganic oxide particles, a silicone resin film precursor capable of forming a silicone resin film, and a silicide film precursor capable of forming a sily force. And a mixture of at least one solvent and a solvent.
- M e 2 0 ⁇ n S I_ ⁇ 2 Arukarishirike one preparative represented by (where M e represents an alkali metal) (e.g., water glass, potassium silicate , Lithium silicate, sodium silicate, and silica) and Si, A1, K, Li, Na, Cs, Ca, Mg, Ti, P, B, Zr, Alternatively, a mixture with a lanthanoid such as Ce or a compound thereof is preferably used.Si, Al, K, Li, Na, CS, Ca, Mg, Ti, P, B, Z
- the compounds of r and Ce are represented by the general formula MO, MO H, MX, or MO R (where M represents the above element, X represents a halogen atom, and R represents an alkyl group).
- a functional material having excellent chemical and physical durability can be obtained.
- a precursor of the alkali silicate can be used.
- precursors of the alkali silicate include Li, K, Na, and Si. water Product, and the like.
- the concentration of the photocatalytic metal oxide and Z or the precursor thereof in the photocatalytic coating composition is from 0.001% by weight to 35% by weight in terms of solid content. And more preferably in the range of 0.1% by weight to 10% by weight.
- a photocatalyst having good performance and good strength A medium surface is obtained. Further, it is possible to obtain an organic material having a uniform and smooth surface and good gloss.
- the photocatalyst coating composition can increase the amount of non-crosslinked oxygen on the surface of the functional material described later.
- the non-crosslinked oxygen has the following meaning.
- Many of the binder components are M-OH (where M represents a metal element, specifically M is Si, Ti, Al, Zr, Sn, Ta, Bi, etc.), but crosslinked by rapid heating Then, by forming an M-0-M bond, the polymer is polymerized and adheres to the surface of the base material together with light and a metal oxide. At this time, some M-OH exists without forming an M-0-M bond while being incorporated into the formed polymer molecule.
- this M-0H is ionically bonded to an ionic species (for example, sodium or the like) present in the photocatalytic coating composition, and M-0-X + (here, And X represents a cation such as a sodium ion).
- an ionic species for example, sodium or the like
- M-0-X + here, And X represents a cation such as a sodium ion
- the non-crosslinked oxygen is more likely to bind to the water molecules than to the molecules that were present on the substrate surface before water, and therefore is present on the substrate surface first.
- the water molecules and the water molecules are exchanged, and as a result, the molecular force previously existing on the surface of the base material is dropped off. Therefore, the presence of the non-crosslinkable oxygen on the surface of the substrate, combined with the hydrophilicity of the photocatalytic metal oxide, causes the surface of the substrate to exhibit extremely high hydrophilicity. As a result of this hydrophilicity, it is possible to obtain an advantage that it is possible to easily wash off lipophilic stains with water, not to mention hydrophilic stains.
- the photocatalytic coating composition contains 0.001 to 100 parts by weight of a binder relative to 1 part by weight of the photocatalytic metal oxide and its precursor. And more preferably 0.1 to 5 parts by weight.
- the photocatalytic coating composition comprises a metal and / or a metal oxide, such as Cu, Ag, Ni, Fe, Zn, Pt, Au, Rh, V, Cr, Co.
- metals or metal oxides selected from platinum group metals and their oxides.
- the Cu, Ag, Pt, Co, Fe, Ni, Cu 2 ⁇ , Ag 2 ⁇ , Au, Zn, Cr is selected from the group consisting of Mn and Mo Metal particles.
- platinum group metals such as Pt, Pd, Ru, Rh, Ir, and 0 s or oxidized compounds enhance the redox activity of light, and as a result, decompose and harm organic matter.
- Addition power is preferable because it can improve the decomposability of gases and odors.
- another preferred example of the metal oxidized product is an oxide of at least one metal selected from the group consisting of Si, Al, K, Li, Na, Cs, Rb and Fr. Is mentioned.
- the metal oxide may be added as having the above-mentioned function as the binder at the same time.
- it is preferable that the metal and the metal oxide are supported on the surface of a photocatalytic metal oxide.
- the above-mentioned metal and metal oxide are supported on the surface of the photocatalytic metal oxide by, for example, adding a metal salt such as silver nitrate or copper acetate to the sol of the photocatalyst particles and irradiating the sol with ultraviolet light or the like.
- a metal salt such as silver nitrate or copper acetate
- the method can be carried out by a method in which a metal is supported on the particle surface, or a method in which the metal is doped into a photocatalyst.
- the photocatalyst coating composition preferably comprises a surfactant.
- the surfactant By adding the surfactant, the photocatalyst coating composition is uniformly formed on the surface of the substrate. It becomes possible to apply.
- the photocatalyst coating composition basically comprises (1) a photocatalytic metal oxide, (2) at least one selected from the group consisting of inorganic oxide particles, a silicone resin film precursor capable of forming a silicon resin film, and a silicon film precursor capable of forming a silicon film; and
- the average crystallite diameter of this photocatalytic metal oxide is preferably 100 nm or less.
- the upper limit is preferably about 20 nm or less, more preferably about 10 nm or less. Further, the lower limit is preferably about 1 nm or more, more preferably about 3 nm or more.
- inorganic oxide particles examples include silica, alumina, zirconia, ceria, Italy, boronia, magnesia, luciferia, ferrite, amorphous titania, hafnia and the like.
- composite oxides such as barium titanate, calcium gayate, water glass, aluminogate, calcium phosphate and the like can be mentioned.
- these inorganic oxides may be in the form of an aqueous colloid using water as a dispersion medium, or an organosol dispersed colloidally in a hydrophilic solvent such as ethyl alcohol, isopropyl alcohol or ethylene glycol. It is preferred that this be done. In particular, use of colloidal silica is preferred.
- the particle size of the inorganic oxide particles is not particularly limited. When formed into an aqueous colloid or an organosol, the particle size of about 5 to 50 nm is the gloss, turbidity, or cloudiness of the final photocatalytic hydrophilic coating. It is preferable from the viewpoint of transparency and the like.
- Preferred examples of the silicon film precursor capable of forming a silicon film usable in the composition according to the present invention include an average composition formula
- R is a group selected from the group consisting of one or more groups of a hydrogen atom and an organic group, X is an alkoxy group or a halogen atom,
- p is a number that satisfies 0 ⁇ P ⁇ 2
- q is a number that satisfies 0 ⁇ q ⁇ 4).
- X is an alkoxy group or a halogen atom
- P is 1 or 2).
- the organic group represented by R is alkyl (more preferably unsubstituted alkyl having 1 to 18 carbon atoms, most preferably alkyl having 3 to 18 carbon atoms) or aryl (preferably fuunyl. Means).
- hydrolyzable silane derivative examples include methyltrimethoxysilane, methyltriethoxysilane, methyltripropoxysilane, methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, ethyltripropoxysilane, and ethyltrimethoxysilane.
- siloxane a partial hydrolysis and dehydration condensation polymerization of the hydrolyzable silane derivative, or a partial hydrolyzate of the hydrolyzable silane derivative
- Those prepared by dehydration condensation with a partial hydrolyzate such as tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane, or ethoxydimethoxysilane can be used.
- the silicone resin obtained by partially hydrolyzing or dehydrating polycondensation of the above-mentioned precursor by a method described below is represented by the following average composition formula:
- R is as defined above
- X is an alkoxy group or a halogen atom
- P is a number that satisfies 0 ⁇ p ⁇ 2).
- the amount of the precursor contained in the composition according to the present invention may be appropriately determined.
- the amount is preferably 10 parts by weight or less in terms of sily force with respect to 1 part by weight of photocatalyst particles, and more preferably. Not more than 5 parts by weight, most preferably not more than 1 part by weight, and more preferably not less than 0.05 part by weight, more preferably not less than 0.1 part by weight, most preferably not less than 0.2 part by weight. is there.
- the solvent contained in the composition according to the present invention is not limited as long as the photocatalyst particles and the precursor are stably dispersed and a hydrophilized surface is finally obtained, but for example, water or an organic solvent or a mixture thereof. Solvents are mentioned as examples. Particularly, water or alcohol or a mixed solvent thereof is preferable.
- the use of alcohol at room temperature and having a molecular weight of 60 to 300, preferably 60 to 100, is preferred.
- the alcohol examples include methanol, ethanol, n-propanol, isopropanol, t-butanol, isobutanol, n-butanol, 2-methylpropanol, pentanol, ethylene glycol, monoacetone alcohol, Diacetone alcohol, ethylene glycol monomethyl ether, 4—hydroxy-1-4-methyl-2-pentanone, dipropylene glycol, propylene glycol, tripropylene glycol, 1-ethoxy-12-propanol, 1-butoxy-1— Propanol, 1-propoxy-1-propanol, propylene glycol monomethyl ether, dipropylene glycol monomethyl ester , Dipropylene glycol monoethyl ether, tripropylene glycol monomethyl ether, 2-butoxyethanol, and the like.
- silica film precursor is an average composition formula
- X is an alkoxy group or a halogen atom, and q is a number satisfying 0 ⁇ q ⁇ 4).
- silica film precursor is a compound represented by the general formula:
- X is an alkoxy group or a halogen atom
- tetrafunctional hydrolyzable silane derivative examples include tetramethoxysilane, tetraethoxysilane, tetrapropoxysilane, tetrabutoxysilane, ethoxydimethoxysilane and the like.
- silicates include partial hydrolysis and dehydration-condensation polymerization of the tetrafunctional hydrolyzable silane derivative.
- a solvent for the composition water, alcohol, and the like can be used.
- a liquid alcohol having a molecular weight of 60 to 300 is preferred.
- Such alcohols can moderate fluctuations in the dispersibility of the composition due to evaporation of the solvent when the composition is applied, because the evaporation is moderately slow. This is because it becomes possible to form an excellent coating film.
- liquid alcohols having a molecular weight of 60 to 300 include n-propanol, isopropanol, t-butanol, isobutanol, n-butanol, 2-methylpropanol, pentanol, ethylene glycol, and mono.
- the composition may contain, in addition to the above components, a surfactant, a polymerization hardener, a hydrolysis catalyst, a leveling agent, an antibacterial metal, a pH adjuster, a fragrance, a storage stabilizer and the like.
- polymer examples include aluminum compounds such as aluminum chelates, aluminum acetyl acetate, aluminum perchlorate, aluminum chloride, aluminum isobutoxide, and aluminum isopropoxide; tetraisopropyl citrate, and tetrabutoxy.
- aluminum compounds such as aluminum chelates, aluminum acetyl acetate, aluminum perchlorate, aluminum chloride, aluminum isobutoxide, and aluminum isopropoxide; tetraisopropyl citrate, and tetrabutoxy.
- Titanium compounds such as titanates; sodium hydroxide, lithium hydroxide, hydroxide hydroxide, sodium methylate, sodium acetate, sodium formate, acetate lithium, potassium formate, potassium propionate, potassium hydroxide
- Basic compounds such as tramethylammonium hydroxide; ⁇ -hexylamine, triptylamine, diazabicycloundecene, ethylenediamine, hexanediamine, diethylenetriamine, tetraethylenebenzymine, triethylamine Of tetramethylamine, ethanolamines, aminopropyltrimethoxysilane, 7-aminopropylmethyldimethoxysilane, amino (2-aminomethyl) aminopropyltrimethoxysilane, and amino (2-aminomethyl) aminopropylmethyldimethoxysilane
- amine compounds tin compounds such as tin acetylacetonate and dibutyltin octarate
- metal compounds such
- hydrolysis catalyst examples include nitric acid, hydrochloric acid, acetic acid, sulfuric acid, sulfonic acid, maleic acid, propionic acid, adipic acid, fumaric acid, phthalic acid, valeric acid, lactic acid, butyric acid, citric acid, and lingo with ⁇ 2 to 5. Acids, picric acid, formic acid, carbonic acid, phenol, and the like can be suitably used.
- Leveling agents include diacetone alcohol, ethylene glycol monomethyl ether, 4-hydroxy-14-methyl-12-pentanone, dipropylene glycol, tripropylene glycol, 1-ethoxy-2-propanol, 1 beave Toxic 2-propanol, propylene glycol monomethyl ether, 1-port oxy-2-propanol, dipropylene glycol monomethyl ether, dipropylene dalicol monoethyl ether, tripropylene dalicol monoethyl ether, etc. are preferred. Available.
- the above-described photocatalytic coating composition is applied to a substrate.
- Applicable coating methods include spray coating, dip coating, flow coating, spin coating, roll coating, brush coating, and sponge coating.
- the composition is preferably applied by spraying.
- the substrate surface is prepared and heated before the application of the photocatalytic coating composition.
- the preheating is performed by heating the surface of the substrate to 20 to 400 ° C.
- the light coating composition applied to the heated substrate surface is advantageous because it spreads uniformly and a uniform coating film can be obtained.
- the surface of the substrate on which the photocatalytic coating composition has been applied may be dried before rapid heating.
- a large amount of heat is applied to the substrate by rapid heating described later. If excess water or solvent components are present on the substrate, there is a possibility that the smoothness of the substrate surface may be lost due to rapid evaporation of water or solvent components due to a rapid temperature change. Therefore, it may be desirable to remove excess water or solvent components in advance by drying. Drying may be performed by blowing or heating.
- FIG. 1 (a) schematically shows a state where a layer 2a of a photocatalyst coating composition is applied to a substrate 1.
- the layer 2a of the photocatalyst coating composition becomes a thin film 2b that imparts a light function to the substrate 1, and the functional material 3 having an optical function is obtained.
- the photocatalyst coating composition on the surface of the substrate in a laminated or multilayered manner.
- the photocatalyst coating composition one having the same or different composition is prepared, and these are described above. It is applied sequentially to the surface of the substrate.
- the application in a laminated or multilayered form is a so-called multi-coating, which enables uniform and even application.
- a composition comprising a binder and a solvent and containing substantially no photocatalytic metal oxide and Z or a precursor thereof is applied.
- a photocatalytic coating composition containing a precursor thereof or a photocatalytic coating composition containing a photocatalytic metal oxide and / or a precursor thereof and a binder As a mode of fully exerting the function of non-crosslinking oxygen, a lamination or multilayer structure is preferred, in which a photocatalyst composition is applied first, and then a composition comprising a binder and ⁇ ij is applied.
- Fig. 2 schematically shows a functional material according to this mode. Layer 2 a of the optical coating composition is applied to the substrate 1. Further, on this layer 2 a, a layer 4 a composed of a binder and a solvent is applied.
- the layer 2a of the light and coating composition becomes a thin film 2b that imparts a photocatalytic function to the substrate 1 by rapid heating described later, and the layer 4a has non-crosslinked oxygen and contributes to exhibiting hydrophilicity. b, and a functional material 3 having a photocatalytic function is obtained.
- the substrate surface coated with the photocatalytic coating composition as described above is subjected to rapid heating.
- rapid heating means that the photocatalyst coating composition on the substrate is uniformly distributed, but the time is such that the entire substrate is not heated to the same temperature as the surface. It means heating. Therefore, it is preferable that the rapid heating is performed only by giving concentrated heat to the surface of the substrate.
- the heating is preferably performed by heating the surface temperature of the base material to 100 ° C. to 800 ° C., more preferably 150 ° C. to 600 ° C. C range. Further, as described above, the substrate is heated for such a time that the entire temperature does not reach the above-mentioned temperature. Specifically, the rapid heating time is preferably about 2 to 60 seconds, more preferably 5 to 30 seconds.
- the rapid heating time is preferably about 2 to 60 seconds, more preferably 5 to 30 seconds.
- the heating temperature is kept substantially constant during the rapid heating. Further, according to a preferred embodiment of the present invention, it is preferable that the temperature of the atmosphere in which the substrate is placed during the rapid heating is 100 ° C. to 100 ° C.
- the rapid heating reduces the power generation per unit area.
- the heating be performed by a heat generating means of 120 MJ / m 2 ⁇ h or more, more preferably 400 MJ / m 2 * h or more.
- the rapidly heated substrate is then cooled and turned into the final functional material. According to a preferred embodiment of the present invention, this cooling may be performed rapidly.
- FIG. 3 is an explanatory view of a functional material manufacturing apparatus according to the present invention.
- the apparatus shown in the figure is an apparatus in which an apparatus according to the present invention and an apparatus for manufacturing a substrate are continuously arranged.
- the equipment shown in the figure is composed of a molding device 5, a glaze device 6, and a baking device 7, which first produces so-called pottery as a base material, a coating device 8 for the photocatalytic coating composition, a rapid heating device 9, and a cooling device.
- the apparatus further includes a transfer device 16 which is disposed in a continuous manner with the device according to the present invention in the region 10 and the force, and which can continuously transfer the base material within each device and between the devices.
- an apparatus for producing a substrate comprising the substrate forming apparatus 5, the glaze apparatus 6, and the baking apparatus 7 may be appropriately selected according to the substrate to which the method according to the present invention is applied, and may have another configuration.
- the apparatus according to the present invention includes not only an apparatus comprising a photocatalyst coating composition coating apparatus 8, a rapid heating apparatus 9, and a cooling area 10, but also the production of a substrate as shown in FIG. It is used to include equipment that can consistently produce functional materials having photocatalytic functions from the field.
- the scope of the present invention also includes a configuration in which the photocatalyst coating composition coating device 8, the rapid heating device 9, and the cooling zone 10 are disposed immediately downstream of the device for manufacturing a base material for the substrate. Included in It is what is done.
- the base material is formed by the forming device 5 in the figure and the glaze is applied by the glaze device 6, the base material is fired by the firing device 7.
- the base material fired by the firing device 7 still has a high temperature.
- the photocatalytic coating composition is applied in a state where the substrate is at a somewhat high temperature.
- the coating device 8 in the figure may be configured according to the method selected as the coating method.
- the apparatus includes a device for spraying the photocatalytic coating composition.
- FIG. 4 schematically shows the structure of the rapid heating device 9 in FIG.
- This rapid heating device 9 holds a heating element 21, a heat-resistant material 22 that covers the heating element and forms a heating space, and a base material 23 to be heated in the heating space and an arrow in FIG. It is basically composed of a transport means 16 for transporting the substrate in the direction A, and a carry-in port 24 and a carry-out port 25 for carrying the substrate into and out of the heating space.
- the heating element 21 is not particularly limited as long as it can rapidly heat the substrate, and may be an electric heating element, a heating element that generates gas by burning gas or other fuels, or the like. As described above, the rapid heating is preferably performed by a heating means having a heat generation amount per unit area of 120 MJ / h or more, more preferably 40 OMJ m ⁇ * h or more. It is preferable to use a heating element capable of generating heat.
- the distance from the heating element to the surface of the substrate may be appropriately determined within a range in which the substrate is applied to the thermal power substrate sufficient for rapid heating, but is generally about 5 mm to 30 O mm. Therefore, it is preferable that the heating element is provided so as to be fixed or movable so as to be within the range of the distance force between the substrates.
- the heating space of the rapid heating device be sufficiently insulated by the heat insulating material 22 and that the influence of heat loss from the carry-in port 24 and the carry-out port 25 be reduced.
- the carry-in port 24 and the carry-out port 25 may be open at all times as shown in FIG. 4, but may be configured to open and close as the base material is carried in and carried out.
- the length of the region where the temperature of the rapid heating is kept substantially constant may be appropriately determined. However, it will be general that the force is set to be 5 cm or more and 3 O m or less.
- the transport device 16 may have any configuration as long as the substrate can be held and transported in the heating space, but a belt conveyor or a roller conveyor is preferably used. According to a preferred embodiment of the present invention, it is preferable that the transfer device 16 is configured so that the heating space is not unnecessarily thermally partitioned so that heat transfer in the heating space is performed well. For example, it is preferable to use a heat-resistant multi-hole belt having a surface aperture ratio of 20% or more or a belt conveyor or a roller conveyor composed of a group of rollers as the conveying means.
- the conveying means is a belt conveyor made of a heat-resistant mesh having a mesh of 50 mm x 5 Omm or less, or a continuous heat-resistant roller group having a pitch of lmm or more and 30 Omm or less. It is preferable to use a roller conveyor.
- the rapidly heated substrate surface is cooled to room temperature by the cooling device 10.
- This device has a function of placing a substrate in a room temperature atmosphere and lowering the temperature of the substrate surface to room temperature. As long as it has the ability to lower the temperature of the substrate surface to room temperature, the device may be configured so that the substrate surface simply touches the air at room temperature, and forcing air at room temperature or slightly above or below room temperature. You may be comprised so that the temperature of the base material surface may be reduced by spraying on a material. However, rapid cooling may cause cracks and the like on the surface of the functional material, and therefore it is desirable to cool rapidly as long as such adverse effects do not occur. FIG.
- FIG. 5 shows an apparatus provided with a preheating device for preheating the surface of the base material before applying the photocatalytic coating composition.
- the substrate surface can be heated by the preheating device, and the substrate surface temperature can be raised to a temperature at which the photocatalyst coating composition can be uniformly applied.
- the device shown in FIG. 5 shows a configuration in which the preheating device 11 is provided in front of the coating device 8. As described above, it is preferable to heat the surface of the base material to 20 ° C. to 400 ° C. by the preheating device. It is a matter of course that an upstream device of the preheating device 11 may be connected to a device comprising a molding device 5, a glazing device 6, and a firing device 7 for producing the base material shown in FIG.
- the base material fired by the baking apparatus 7 still has a high temperature, if a functional material having a photocatalytic function is manufactured consistently with the manufacture of the base material, this preliminary Generally, no heating device is required. Therefore, this pre-heating device Typically, this will be necessary if a separate substrate is manufactured and does not have a sufficient temperature.
- a drying device 12 for drying the substrate to which the coating composition has been applied is provided before the rapid heating device 9.
- the drying device 12 has a blowing means or a heating means and removes excess water or solvent components from the surface of the substrate.
- the rapid heating device 9 and the cooling device 10 may be the same as the device shown in FIG.
- titanium sol manufactured by Ishihara Sangyo Co., Ltd., trade name: STS-21
- silica sol manufactured by Nissan Chemical Co., Ltd., trade name: Snowtex S
- lithium silicate manufactured by Nippon Chemical Co., Ltd., trade name: lithium silicate 35
- 1 part by weight of titanium oxide, 1 part by weight of a 1% aqueous solution of silver nitrate and 2 parts by weight of a 0.3% aqueous solution of copper acetate are added, and irradiated with ultraviolet light (ultraviolet light intensity: about lmW / cm ⁇ ) for 4 hours. did.
- the solution was stirred so that ultraviolet rays were sufficiently irradiated.
- the final concentration of the photocatalyst coating composition was 0.2% by weight of titanium sol in which silver and copper were supported on titanium oxide light (solid content: 0.1%), 0.3% by weight of silica sol, and 0.3% by weight of lithium silicate.
- a mixed sol of 0.4% by weight was prepared.
- the ceramic material was press-molded with a molding device 5 of the device shown in FIG. 3 to obtain ⁇ , and then a glaze was applied to the surface of the obtained base material with a glaze device 6. Subsequently, it was baked by passing through a porch Iraha kiln, which is a sintering apparatus 7 set at a sintering temperature of 1150 ° C, for 40 minutes to obtain a tile.
- a porch Iraha kiln which is a sintering apparatus 7 set at a sintering temperature of 1150 ° C, for 40 minutes to obtain a tile.
- the photocatalytic coating composition prepared above was applied to the surface of the tile.
- the applied amount was 15 gZm. Since the tile temperature was as high as 150 ° C, excess moisture was instantaneously steamed. ⁇ ⁇ Only solids are uniformly laminated on the tile surface, forming a thin film of about 0.1 lm.
- the tiles were transported into a furnace, which is a rapid heating device continuously arranged in coating apparatus 8. Heating elements in the furnace top is arranged at a high density, the furnace atmosphere temperature is about 800 ⁇ 1000 ° C, ⁇ fi is approximately per unit area of the furnace 1600M J / m 2 ⁇ h, heat The area was 30 cm x 150 cm. The time the tiles were placed in the furnace was about 30 seconds, and the time they were placed under the tile heating elements was about 10 seconds. As a result, the thin film formed on the tile surface was completely immobilized on the tile surface.
- the surface temperature of the tiles removed from the furnace had risen from 300 ° C to 350 ° C.
- the tiles were then introduced into a cooling device that cools the tiles by blowing cool air from above and below the tiles, and cooled to 100 ° ( ⁇ 150 ° C) for 3 m.
- the functional material tile thus obtained had a photocatalytic function, a high antibacterial, antifouling, deodorizing and other degrading function, and was also hydrophilic.
- the strength (hardness) of the thin film formed on the tile surface was 4 or more in Mohs hardness, and it was a strong film with excellent wear resistance and chemical resistance.
- the preparation of the photocatalyst coating composition was performed in the same manner as in Example 1 except that 1 part by weight of a 1% aqueous solution of silver nitrate and 1 part by weight of a 3% aqueous solution of copper acetate were used instead of 2 parts by weight of an aqueous solution of 0.3% copper acetate. I went.
- Example 1 a large tile (0.9mxl. 8m) was prepared. That is, after the ceramic raw material is extruded and formed by the forming apparatus 5 of the apparatus shown in FIG. 3, glaze is applied to the surface of the base material by the glazing apparatus 6 and the firing temperature is set to 1150 ° C. as the firing apparatus 7. After passing through the specified roller and hearth kiln for 3 hours, it was fired to obtain a large tile.
- the same optical coating composition as in Example 1 was spray-coated on the surface of the tile.
- the coating amount was 15 gZn ⁇ . Since the tile temperature was as high as 80 ° C, excess water evaporated instantaneously, and only the solid content was uniformly deposited on the tile surface, forming a thin film of about 0.1.
- the tiles were transported into a furnace, which is a rapid heating device continuously arranged in coating apparatus 8.
- the heating elements in the upper part of the furnace are arranged at high density, the atmosphere temperature in the furnace is about 800 to 1000 ° C, fi is about 1600 MJ / m ⁇ h per area in the furnace, and the heating area is 1. It was 5mx28m.
- the time spent in the tile furnace was about 60 seconds, and the time the tiles were placed under the heating element was about 50 seconds. As a result, the thin film formed on the tile surface was completely immobilized on the tile surface.
- the surface temperature of the tiles removed from the furnace had risen from 200 ° C to 250 ° C.
- the dull was subsequently introduced into a cooling system that cools the tiles by spraying water and was cooled to 100 ° C to 150 ° C for 10m.
- the functional material tile having a photocatalytic function obtained in this way had a photocatalytic function, a high antibacterial property, an antifouling property, a deodorizing property, etc., and a hydrophilic property.
- the strength (hardness) of the thin film formed on the tile surface was 4 or more in Mohs hardness, and it was a strong film with excellent wear resistance and chemical resistance.
- titanium alkoxide titanium tetraisopropoxide
- tetraethyl orthosilicate tetraethyl orthosilicate
- a glass plate having a size of lmx lm was prepared as a substrate. (c) Production of functional materials
- the coating device 8 and the drying device 12 are alternately and repeatedly provided three times.
- the surface temperature of the glass was heated to 40 ° C by the preheating device 11 set to a temperature of 40 ° C.
- the light and coating composition was spray applied to the glass surface.
- the application amount was 5 g / m 2 .
- the temperature of the glass is as low as 40 ° C, and it is difficult to evaporate water and alcohol. Therefore, after application, the glass is dried at 100 ° C, and the application and drying are repeated three times to laminate. Only the solid content was uniformly deposited on the glass surface, and a thin film of about 0.1 was formed.
- the glass was carried into a furnace, which was a rapid heating device 9 continuously disposed in the last drying device 12.
- the heating elements in the upper part of the furnace were arranged at high density, and the ambient temperature in the furnace was about 550 ° C.
- the glass was placed in the furnace for about 2 seconds, so that the thin film formed on the glass surface was completely fixed on the glass surface.
- the surface temperature of the glass discharged from the furnace had risen from 250 ° C to 350 ° C.
- the glass was then introduced into a cooling device that cooled the glass by forcibly blowing air, and was cooled to 50 ° C to 150 ° C over 3 m.
- the resulting functional material had a high surface smoothness, a photocatalytic function, a high decomposition function, and a high hydrophilicity.
- the hardness (Mohs altitude) of the thin film formed on the glass surface was as high as 4 or more, and it was a strong film with excellent abrasion resistance and chemical resistance.
- an inorganic decorative board having a surface coated with an acrylic urethane coating and a fluororesin coating was prepared.
- the obtained functional material having a solvent function was a strong film having high surface smoothness, having a decomposition function and oil repellency, and having excellent wear resistance and chemical resistance.
- a titanium sol (STS-21), a silica sol (Nissan Chemical Co., Ltd., trade name Snowtex 0), a lithium silicate (Nissan Yidaku Co., Ltd., trade name lithium silicate 35), a surfactant (Kao Emulgen 707), 1 part by weight of 1% silver nitrate aqueous solution and 2 parts by weight of 0.3% copper acetate aqueous solution are added to 1 part by weight of titanium oxide, and ultraviolet light (ultraviolet light intensity about lmW / cm 2 ) is added. Irradiated for 4 hours. During this time, the solution was stirred so that ultraviolet rays were sufficiently irradiated.
- the final concentration of the photocatalyst coating composition was 0.1% by weight of titanium sol having silver and copper supported on the titanium oxide photocatalyst, 0.1% by weight of silica sol, and 0.1% by weight of lithium silicate.
- a mixed sol was prepared at 5% by weight and 0.001% by weight of surfactant.
- a Western tableware was prepared as a base material.
- the surface temperature of the dish was heated to 100 ° C by the preheating device 11 set to 100 ° C. Then, the surface was spray-coated with the photocatalytic coating composition. The coating amount was 40 g / m 2 . Since the temperature of the dish was as high as 100 ° C, the water evaporated instantaneously, and only the solid content was uniformly deposited on the dish surface, forming a thin film of about 0.4 / m. Next, the plate was carried into a furnace, which was a rapid heating device 9 continuously arranged in the drying device 12.
- the heating elements in the upper part of the furnace are arranged at high density, the ambient temperature in the furnace is about 800 to 1000 ° C, 3 ⁇ 4 * is about 1600 MJZcm 2 ⁇ 1 ⁇ per area in the furnace, and the heating area is 30 cm x 150 cm.
- the dish was placed in the oven for about 10 seconds, and as a result, the thin film formed on the surface was completely fixed on the dish surface.
- the surface temperature of the pan removed from the furnace had risen from 250 ° C to 300 ° C.
- the dishes were subsequently introduced into a cooling device, which was cooled by air cooling, and was cooled to between 50 ° C and 150 ° C within 3 m.
- the obtained dish had a light) ⁇ function and was excellent in antibacterial properties.
- the salad oil adhering to the surface could be easily removed only by washing with water.
- the strength (hardness) of the thin film formed on the surface of the dish was a hard film with Mohs hardness of 4 or more, and was a strong film with excellent wear resistance and chemical resistance.
- Functional materials were manufactured using the apparatus shown in FIG. First, the surface temperature of the tile was heated to 100 ° C by the preheating device 11 set to 100 ° C. Thereafter, 0.05% of titanium chelate, which is a photocatalytic coating composition, was spray-coated on the surface of the base material. The water evaporated immediately, solids were immobilized on the tile surface and a film force of about 0.2 m was formed.
- titanium chelate which is a photocatalytic coating composition
- the tiles were carried into a furnace, which is a rapid heating device 9 continuously arranged in the drying device 12.
- the heating elements in the upper part of the furnace are arranged at high density, the atmosphere temperature in the furnace is about 800 to; L 000 ° C, and the heat quantity is about 1600 iJ / m 2 ⁇ h per furnace area.
- the heating area was 30 cm x 150 cm.
- the tile was placed in the furnace for about 10 seconds, and as a result, the thin film formed on the surface was completely immobilized on the surface. '
- the surface temperature of the tiles removed from the furnace had risen from 250 ° C to 300 ° C.
- the evening roll was subsequently introduced into a cooling system that cooled by air cooling, and was cooled to 50 ° C to 150 ° C over 3 m.
- the obtained tile with photocatalytic function has photocatalytic function, hydrophilic and antibacterial It had excellent properties.
- the strength (hardness) of the thin film formed on the tile surface was a hard film with Mohs hardness of 4 or more, and was a strong film with excellent wear resistance and chemical resistance.
- the time was about 15 seconds, resulting in the formation of a thin film on the surface
- the color difference ( ⁇ ) after the measurement was about 18.
- the contact angle of water was about 5 degrees after the sample was left under the BLB lamp for 24 hours.
- the furnace was fired at a furnace temperature of about 750 ° C, a calorific value of 1200 MJZ 1: "*], and a heating area of 0.6 m 2 with the rapid heating device 9 installed continuously.
- the temperature was 350 ° C.
- the time the tile was placed in the furnace was about 10 seconds, A thin film was formed on the surface.
- a 1% silver nitrate solution was applied to the sample surface, and the color difference ( ⁇ ⁇ ) was measured after being left under a BLB lamp for 5 minutes. The antibacterial activity of the sample surface was high.
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Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU49319/99A AU4931999A (en) | 1998-07-30 | 1999-07-30 | Method for producing high-performance material having photocatalytic function and device therefor |
EP99933202.6A EP1118385B1 (en) | 1998-07-30 | 1999-07-30 | Method for producing high-performance material having photocatalytic function and device therefor |
ES99933202.6T ES2534892T3 (es) | 1998-07-30 | 1999-07-30 | Procedimiento para producir material de alto rendimiento que tiene función fotocatalítica y dispositivo para el mismo |
JP2000562142A JP3852284B2 (ja) | 1998-07-30 | 1999-07-30 | 光触媒機能を有する機能材の製造方法およびそのための装置 |
US09/518,909 US6368668B1 (en) | 1998-07-30 | 2000-03-03 | Method and apparatus for producing a photocatalytic material |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
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JP10/230120 | 1998-07-30 | ||
JP23012098 | 1998-07-30 | ||
JP31684798 | 1998-10-19 | ||
JP10/316847 | 1998-10-19 | ||
JP1486899 | 1999-01-22 | ||
JP11/14868 | 1999-01-22 | ||
JP11/164364 | 1999-06-10 | ||
JP16436499 | 1999-06-10 |
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US09/518,909 Continuation US6368668B1 (en) | 1998-07-30 | 2000-03-03 | Method and apparatus for producing a photocatalytic material |
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WO2000006300A1 true WO2000006300A1 (en) | 2000-02-10 |
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PCT/JP1999/004126 WO2000006300A1 (en) | 1998-07-30 | 1999-07-30 | Method for producing high-performance material having photocatalytic function and device therefor |
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US (1) | US6368668B1 (ja) |
EP (1) | EP1118385B1 (ja) |
JP (1) | JP3852284B2 (ja) |
AU (1) | AU4931999A (ja) |
CZ (1) | CZ295546B6 (ja) |
ES (1) | ES2534892T3 (ja) |
TW (1) | TWI229617B (ja) |
WO (1) | WO2000006300A1 (ja) |
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Also Published As
Publication number | Publication date |
---|---|
EP1118385B1 (en) | 2015-01-21 |
AU4931999A (en) | 2000-02-21 |
EP1118385A4 (en) | 2003-07-02 |
EP1118385A1 (en) | 2001-07-25 |
US6368668B1 (en) | 2002-04-09 |
CZ2001378A3 (cs) | 2001-11-14 |
CZ295546B6 (cs) | 2005-08-17 |
TWI229617B (en) | 2005-03-21 |
JP3852284B2 (ja) | 2006-11-29 |
ES2534892T3 (es) | 2015-04-30 |
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