WO2006087986A1 - チタン酸化物粒子の分散液、チタン酸化物薄膜、有機機能膜形成用溶液、有機機能膜形成基体及びその製造方法 - Google Patents
チタン酸化物粒子の分散液、チタン酸化物薄膜、有機機能膜形成用溶液、有機機能膜形成基体及びその製造方法 Download PDFInfo
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- WO2006087986A1 WO2006087986A1 PCT/JP2006/302454 JP2006302454W WO2006087986A1 WO 2006087986 A1 WO2006087986 A1 WO 2006087986A1 JP 2006302454 W JP2006302454 W JP 2006302454W WO 2006087986 A1 WO2006087986 A1 WO 2006087986A1
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- Prior art keywords
- solution
- group
- titanium
- dispersion
- organic functional
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Classifications
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
- C01G23/047—Titanium dioxide
- C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/36—Compounds of titanium
- C09C1/3607—Titanium dioxide
- C09C1/3669—Treatment with low-molecular organic compounds
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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
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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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0215—Coating
- B01J37/0219—Coating the coating containing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
- C01G23/00—Compounds of titanium
- C01G23/04—Oxides; Hydroxides
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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
- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
Definitions
- the present invention is formed from a dispersion of titanium oxide particles obtained by adding a large excess of water to an organic solvent solution containing a titanium chelate compound, a method for producing the same, and this dispersion.
- the present invention relates to a titanium oxide thin film, a solution for forming an organic functional film obtained by adding a solution of a metal compound having a hydrolyzable group to the dispersion, an organic functional film-forming substrate obtained using this solution, and a method for producing the same .
- a coating film may be formed using a fluorine-containing silane coupling agent.
- Patent Document 1 discloses a mixture containing at least an alkoxysilane-based surfactant, a non-aqueous solvent not containing active hydrogen, and a silanol condensation catalyst.
- a method for forming a chemically adsorbed film covalently bonded via a siloxane bond by bringing the solution into contact with the substrate surface has been proposed.
- the silanol condensation catalyst at least one substance in which carboxylic acid metal salt, carboxylic acid ester metal salt, carboxylic acid metal salt polymer, carboxylic acid metal salt chelate, titanate ester and titanate ester chelate power are also selected is exemplified. Has been.
- Patent Document 2 discloses a transparent ceramic characterized in that it is uniformly dissolved or dispersed in a mixed solvent consisting of water and organic solvent. A film-forming composition is described. The technology described in this document can freely control the refractive index and dielectric constant, which have high durability and scratch resistance, on the surface of substrates such as glass and plastic, and can cure transparent ceramic coatings at low temperatures. A composition for forming a transparent ceramic film.
- Patent Document 3 discloses that (a) —general formula: R x Si (OR y ) (R x represents an organic group having 1 to 8 carbon atoms, R y
- a characteristic coating composition is described.
- the technique described in this document is a coating composition for forming a coating film excellent in water resistance, chemical resistance, crack resistance, weather resistance and adhesion on the surface of metal or plastic products.
- Non-Patent Document 1 describes that after treating Ti (OPri) with acetylacetone (acacH), ethanol
- Non-Patent Document 2 discloses that a chelating agent such as acetylacetone is added to a Ti (OPri) solution.
- Patent Documents 2 and 3 and Non-Patent Documents 1 and 2 a large excess of water (5 times mol or more with respect to the titanium atom) is added to the titanate salt. There is no statement that a dispersion of titanium oxide particles suitable for forming a thin film can be obtained.
- Patent Document 1 Japanese Patent Application Laid-Open No. 8-337654
- Patent Document 2 Japanese Patent Laid-Open No. 2-048403
- Patent Document 3 Japanese Patent No. 22924081
- Non-patent literature l Mat. Res. Symp. Proc., Vol. 121, P317-322, 1988
- Non-patent literature 2 Bull. Korean. Chem. Soc., Vol. 20, No. 12, 1999 Disclosure
- the present invention has been made in view of such a state of the art, and a titanium oxide that can rapidly form a dense organic thin film with few impurities and can be a titanate thin film forming material.
- the present inventors have intensively studied a method for forming a coating film on the surface of a substrate using an organic solvent solution containing a (partial) hydrolysis product of a titanium alkoxide that solves the above-mentioned problems.
- an organic solvent solution containing a titanium chelate compound fine particles of titanium oxide having a particle diameter of 1 to 20 nm are uniformly dispersed. It has been found that a dispersion can be obtained, and that when this dispersion is applied onto the substrate surface and dried, a dense titanate thin film with few impurities can be quickly and easily formed.
- the present inventors can rapidly obtain an organic functional film applicable to an optical lithography method or the like by mixing the dispersion with a solution of a metal compound having a hydrolyzable group at a predetermined ratio.
- the inventors have found that an organic functional film can be easily and efficiently formed on a substrate, and have completed the present invention.
- a titanium chelate compound obtained by bonding a hydrolyzable group or hydroxyl group and a chelate ligand to a titanium atom, and 5 times mole or more of water with respect to the titanium chelate compound A dispersion of titanic acid oxide particles obtained as described above, wherein the content of the titanium oxide is 0.1 to 10% by weight in terms of acid / titanium equivalent with respect to the total dispersion. A characteristic dispersion of titanium oxide particles.
- the amount of water to be mixed is 10 times mol or more with respect to the titanium chelate compound, (1) to (4), any one of the dispersions.
- the titanium chelate compound has the formula (I)
- X represents a chelate ligand
- R 1 represents an alkoxyl group which may have a substituent
- nl represents an integer of 1 to 3, and when nl is 2 or more, R 1 may be the same or different, and when (4-nl) is 2 or more, X may be the same or different.
- (1) to (6) V a dispersion of any one of the above.
- a predetermined amount of a chelate compound is added to an organic solvent solution of a titanium alkoxide compound.
- a dispersion of titanic acid oxide particles obtained by mixing a solution obtained by mixing the above-mentioned solution with water of 5 times mol or more with respect to the titanium alkoxide compound.
- a predetermined amount of a chelate compound is added to an organic solvent solution of a titanium alkoxide compound, and more than 5 times moles of water is added to the titanium alkoxide compound.
- the following titanium oxide thin films (14) to (26) are provided.
- a titanium oxide thin film characterized in that any one of the dispersions (1) to (11) is brought into contact with the surface of a substrate.
- Organic functional film-forming solution obtained by mixing 5 times or more moles of water with respect to the number of moles.
- the organic compound film forming solution is any one of (29) to (31), wherein a metal compound is used in an amount of 2 times or more per 1 mol of the titanium chelate compound.
- a metal compound is used in an amount of 2 times or more per 1 mol of the titanium chelate compound.
- the total content of the titanium chelate compound and the metal compound is 0.1 to 10% by weight in terms of metal oxide (29) to (32) Solution for forming organic functional film.
- the metal of the metal compound is at least one selected from the group force consisting of titanium, zirconium, aluminum, silicon, germanium, indium, tin, tantalum, zinc, tungsten, and lead. (27) to (35) Any V solution for forming an organic functional film.
- hydrolyzable group of the metal compound has a substituent! /, But may be an alkoxyl group.
- the metal compound has the formula (II)
- R 2 represents a hydrocarbon group which may have a substituent, a halogenated hydrocarbon group which may have a substituent, a hydrocarbon group containing a linking group or a linking group.
- R 3 represents a substituent.
- n2 represents an integer from 0 to (m — 1). When n2 is 2 or more, R 2 may be the same or different. When (m — 1) is 2 or more, R 3 is They may be the same or different. (27) to (37) Any one solution for forming an organic functional film.
- the organic solvent is a water-miscible solvent (27) to (38), Organic functional film forming solution.
- An organic functional film-forming substrate comprising an organic thin film formed by bringing the organic functional film-forming solution described in any one of (27) to (40) V in contact with the surface of the substrate.
- the organic functional film is a thin film that becomes a hydrophilic film with a water contact angle of 20 ° or less when irradiated with light.
- Organic functional film forming substrate
- the organic functional film-forming substrate according to any one of (41) to (50) V which is a thin film having a carbon element content of 2 to 40%.
- the titanium oxide thin film forming substrate on which a titanium oxide thin film having a V deviation is formed on the surface thereof is used as the organic functional film having any of the above (27) to (40) V.
- the dispersion of titanate oxide particles of the present invention is obtained by stably dispersing titanate oxide fine particles having an average particle diameter of the order of nanometers in an aqueous solvent.
- the dispersion of the present invention is stable and hardly changes even after storage for 3 months at room temperature.
- a titanium oxide thin film which is a fine monomolecular film with few impurities can be formed quickly and easily.
- the dispersion of titanic acid oxide particles of the present invention is also useful as the material for forming an organic functional film of the present invention.
- an organic functional film applicable to an optical lithography method and the like can be quickly and easily formed on a substrate.
- the organic functional film-forming substrate of the present invention is one in which an organic functional film is formed on the substrate, and can be suitably used for a photolithographic method.
- FIG. 1 is a view showing the particle size distribution of titanate oxide particles contained in an A-3 solution.
- FIG. 2 is a diagram showing the results of TG-DTA analysis of powder obtained by vacuum drying the A-3 solution at room temperature.
- FIG. 3 is a diagram showing the zeta potential measurement results of A-3 solution.
- FIG. 4 is an observation view with a scanning probe microscope before and after coating with an A-3 solution.
- (a) is a surface view of a polyester substrate before coating A-3
- (b) is a surface view of a thin film formed from an A-3 solution.
- FIG. 5 is a diagram showing the XPS analysis result of the element distribution of a thin film (C-1) formed using the A-1 solution.
- FIG. 6 is a diagram showing the XPS analysis result of the element distribution of a thin film (C-8) formed using the A-4 solution.
- FIG. 7 is a diagram showing an XPS analysis result of an element distribution of a thin film (CH-1) formed using an H-1 solution.
- FIG. 8 is a diagram showing an XPS analysis result of an element distribution of a thin film (CH-2) formed by using an H-2 solution V.
- a titanium chelate hydrate compound in which a hydrolyzable group and a chelate ligand are bonded to a titanium atom, and a large excess of water with respect to the titanium chelate hydrate mixture are mixed.
- This is a dispersion of titanic acid oxide particles.
- the titanium chelate compound used in the present invention is not particularly limited as long as it is a titanium compound obtained by binding a hydrolyzable group and a chelate ligand to a titanium atom.
- the valence of the titanium atom as the central metal atom is usually 24, preferably 4.
- the hydrolyzable group is not particularly limited as long as it is a group that reacts with water and decomposes. Specific examples include an alkoxyl group which may have a substituent, an acyloxy group which may have a substituent, a halogen atom, an isocyanate group, a cyano group, an amino group and an amide group.
- the acyloxy group includes an acetoxy group, a propionyloxy group, an n-propylcarboxoxy group, an isopropylcarboxoxy group, an n-butylcarbonyloxy group Etc.
- Examples of the substituent for the alkoxyl group and acyloxy group include a halogen atom, a carboxy group. Examples thereof include a syl group, an amide group, an imide group, an ester group, and a hydroxyl group.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom.
- an alkoxyl group which may have a substituent an alkoxyl group which may have a substituent, an alkoxyl group which may have a substituent, an alkoxyl group which may preferably have a substituent such as an acyloxy group, a halogen atom or an isocyanate group.
- an alkoxyl group having 1 to 4 carbon atoms which is more preferred.
- the chelate ligand is not particularly limited as long as it is a ligand capable of binding to a metal to form a chelate, and may be a neutral ligand or an anion. It may be a monodentate ligand or a multidentate ligand as long as it is bonded to a metal atom at at least one location. Also, for example, bidentate ligands do not have to be bound to a single metal atom in bidentate.
- chelate ligand include the following. However, it is exemplified as a chelate compound that can be a chelate ligand.
- Saturated aliphatic dicarboxylic acids such as oxalic acid, malonic acid, succinic acid, gnoretanolic acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, etc .; j8-diketones; j8-ketoesters such as methyl acetoacetate and cetylacetate; glycols such as ethylene glycol; daricholic acids such as oxyacetic acid; ethylenediamintetraacetic acid (EDTA) and its sodium salt, ethylenediamin, 1, 3 —Nitrogen-containing compounds such as propanediamine, diethylenetriamine, pentamethyldiethylenetriamine, hexamethyltriethylenetetramine, tris [2- (dimethylamino) ethyl] amine, tri (pyridylmethyl) amine;
- j8-diketones such as methyl acetoacetate and cetylacetate
- 2-Mercapto alcohols such as mercaptoethanol; dithio such as ethanedithiol Sulfur-containing compounds such as: all compounds; mercaptoamines such as 2-mercaptoethylamine; dithioketones such as 2,4-pentanedithione;
- titanium chelate compound examples include one or more of the compounds represented by the formula (I).
- R 1 represents an alkoxyl group which may have a substituent
- X represents a chelate ligand.
- R 1 include the same groups as those exemplified as the alkoxyl group optionally having a substituent of the hydrolyzable group.
- Specific examples of X include the same as those exemplified as the chelate ligand.
- nl represents an integer of 1 to 3. In order to form a high-density organic thin film, nl is preferably 1.
- R 1 When nl is 2 or more, R 1 may be the same or different. When (4-nl) is 2 or more, X may be the same or different.
- the method for producing a titanium chelate compound is not particularly limited, and examples thereof include a method of adding a predetermined amount of a chelate compound to an organic solvent solution of a titanium alkoxide compound described later.
- the amount of the chelate compound added is usually 1 to 5 times mol, preferably 1 to 3 times mol per mol of titanium alkoxide compound.
- the water used for the preparation of the dispersion of the present invention is not particularly limited as long as it is neutral. From the viewpoint of obtaining a dense titanate thin film with few impurities, pure water, distilled water, or ion exchange is used. It is preferable to use water.
- the amount of water used is a large excess with respect to the titanium chelate compound. Specifically, the amount is 5 times mol or more, preferably 10 times mol or more, more preferably 20 times the titanium chelate compound. It is more than double mole.
- the maximum amount of water used is determined by the concentration of the titanium chelate compound in the dispersion to be adjusted.
- the amount of water used in a dispersion with a concentration of 0.1% or more is on the other hand, it is 10000 times mol or less, preferably 5000 times mol or less. If the dispersion has a concentration of 0.1% or less, the maximum amount of water used is even greater.
- Water can also be used after diluted with an organic solvent. Also, even if water is added at once, several times It may be divided and added in portions, or a constant amount may be added continuously.
- organic solvent to be used examples include the same organic solvents as those used for the solution of the titanium chelate compound described below.
- Examples of the method of mixing the titanium chelate compound with a large excess of water include, for example, a method of adding water to an organic solvent solution of a titanium chelate compound, an organic solvent solution of a titanium chelate compound or a titanium chelate compound. The method of adding to water is mentioned.
- the organic solvent used in the organic solvent solution of the titanium chelate compound is not particularly limited, and examples thereof include alcohols such as methanol, ethanol and isopropanol; halogens such as methylene chloride, black mouth form and black mouth benzene.
- Hydrocarbons such as hexane, cyclohexane, benzene, toluene and xylene; ethers such as tetrahydrofuran, jetyl ether and dioxane; ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Amides such as dimethylformamide and N-methylpyrrolidone; Sulfoxides such as dimethylsulfoxide; Methylpolysiloxane, Otamethylcyclotetrasiloxane, Decamethylcyclopentanesiloxane, Methylphenylpolysiloxane, Dimethyl silicone, Phenol Recone, alkyl-modified silicones, silicone (JP-A-9 208 438 Publication) such as polyether silicones; fluorocarbons; CBr C1CF, CC1F CF
- the hydrolysis reaction of the titanium chelate compound and the like easily proceeds to form a dense and uniform titanic acid oxide thin film and does not solidify at a low temperature.
- a solvent containing alcohols which is preferably a water-miscible solvent, is more preferable.
- Examples of the solvent containing alcohols include a solvent that is one or more of alcohols, or a mixed solvent such as alcohols and other organic solvents. Preferred is a mixed solvent.
- a mixed solvent As the mixed solvent consisting of the alcohol and other organic solvent, a mixed solvent in which hydrocarbons such as toluene and xylene and lower alcohols such as methanol, ethanol, isopropanol, and t-butanol are combined is preferable. Masashi.
- the mixing ratio of the mixed solvent is not particularly limited, but it is preferable to use hydrocarbons and lower alcohols in a volume ratio of 99 Zl to 50 Z50.
- the concentration of the titanium chelate compound in the organic solvent is not particularly limited as long as it has a fluidity that suppresses rapid heat generation and can be stirred when water is added. 1-50 properly preferred weight 0/0, more preferably from 5 to 30 wt%.
- the reaction temperature of the hydrolysis reaction of the titanium chelate compound is a force depending on the reactivity and stability of the titanium chelate compound used.
- the reaction temperature ranges from 100 ° C to the reflux temperature of the organic solvent used, preferably The temperature range is from 20 ° C to room temperature.
- the temperature of the reaction solution is raised from room temperature to the reflux temperature of the solvent to be used for hydrolysis and dehydration condensation reaction. Can also be performed.
- the stirring time is usually several minutes and several hours. In this case, it is also preferable to perform ultrasonic treatment in order to obtain a uniform dispersion.
- an acid, a base, or a dispersion stabilizer may be added in the hydrolysis reaction of the titanium chelate compound with water.
- Acids and bases are used as a deflocculant to re-disperse the precipitate formed by condensation, and to produce dispersoids such as colloidal particles by hydrolyzing and dehydrating and condensing titanium chelate compounds.
- dispersoids such as colloidal particles by hydrolyzing and dehydrating and condensing titanium chelate compounds.
- acids used include mineral acids such as hydrochloric acid, nitric acid, boric acid and borohydrofluoric acid, acetic acid, formic acid, oxalic acid, carbonic acid, trifluoroacetic acid, p organic acids such as toluenesulfonic acid and methanesulfonic acid, etc.
- Photoacid generators that generate acid upon irradiation with light, such as diphenyl-hexahexafluorophosphate and triphenylphospho-hexafluorophosphate;
- Examples of the base used include triethanolamine, triethylamine, 1,8 diazabicyclo [5.4.0] -7 undecene, ammonia, dimethylformamide, phosphine and the like. It is.
- the dispersion stabilizer refers to an agent such as a deflocculating agent, a protective colloid, a coagulation inhibitor such as a surfactant and the like, which has the effect of stably dispersing the dispersoid in the dispersion medium.
- polyhydric carboxylic acids such as glycolic acid, gluconic acid, lactic acid, tartaric acid, citrate, malic acid and succinic acid; hydroxycarboxylic acids; phosphoric acids such as pyrophosphoric acid and tripolyphosphoric acid; acetylethylacetone, methyl acetoacetate, aceto Ethyl acetate, acetoacetate-n-propyl, acetoacetate-i-propyl, acetoacetate n-butyl, acetoacetate sec butyl, acetoacetate t-butyl, 2,4 hexanedione, 2,4 heptanedione, 3,5 heptanedione, 2, 4 octanedione, 2, 4 nonanedione, 5-methyl-hexanedione, etc., multidentate compounds with strong chirality against metal atoms; snorose 3000, 9000, 17000, 200
- Phosphoric acid-based, polyesteramine dimethylpolysiloxane 'methyl (polysiloxyalkylene) siloxane copolymer, trimethylsiloxykey acid, carboxy-modified silicone oil, amine-modified silicone, etc. (JP-A-9 208438, JP-A-2000-53421) No. gazette)) and the like.
- the content of titanium oxide in the dispersion of the present invention is 0.1 to: L0% by weight, preferably 0.1 to 5% by weight, in terms of titanium oxide conversion concentration with respect to the entire dispersion.
- the dispersion of the present invention fine particles of titanic acid salt, which is a hydrolysis product of a titanium chelate compound, are stably dispersed without agglomerating in an aqueous solvent or an organic solvent.
- This is a dispersion of titanic acid oxide particles having properties.
- the state of stable dispersion without agglomeration refers to a state in which the dispersoids of hydrolysis products such as titanium chelate compounds are not condensed and not separated in an organic solvent.
- it represents a transparent and homogeneous state.
- transparent means a state in which the transmittance in visible light is high.
- the concentration of the dispersoid is 0.5% by weight in terms of oxide
- the optical path length of the quartz cell is lcm
- the control sample is Expressed as a spectral transmittance measured with an organic solvent and a light wavelength of 550 nm, it preferably represents a transmittance of 80 to 100%.
- the titanate oxide particles contained in the dispersion of the present invention are preferably amphiphilic. That is, it is preferable for obtaining a uniform and stable dispersion that the titanic acid oxide particles have an affinity for an organic solvent as well as for an aqueous solvent. Such a dispersion containing titanic acid oxide particles may cause repelling when coated on a substrate even if the water content exceeds 50% by weight with respect to the total dispersion. It gives a titanic acid thin film with uniform film quality.
- the particle diameter of titanic acid oxide particles contained in the dispersion of the present invention is not particularly limited, but is usually in the range of 1 to 100 nm, preferably 1 to 50 nm, more preferably 1 to 20 nm.
- the titanate salt particles are preferably monodispersed.
- the dispersion of the present invention is excellent in storage stability. That is, even after the dispersion of the present invention is sealed and stored at room temperature for 3 months, the average particle size of the titanic acid oxide particles contained in the dispersion does not cause white turbidity. . In addition, even when a dispersion after storage for 3 months is used, a titanium oxide thin film having a uniform film quality can be formed.
- the dispersion and thin film of the present invention include an inorganic film for pattern formation, a surface treatment film for printing plate, a base inorganic film for SAM film formation, which uses fine photosensitivity with less impurities, which will be described later.
- Optical films such as low refractive films, thin films for semiconductor elements, photocatalyst films and their precursor films, ink adhesion improving films, modified films on plastic surfaces, etc., and wetting to form these films
- Production of cloudy glass formed on the surface of glass substrates such as adhesives, coating materials and curing agents or crosslinking agents for coating agents and coating agents, reaction catalysts such as esterification, etc. ⁇ ⁇ ⁇ ⁇ ⁇ Binders or carriers such as agents It can be used for.
- the dispersion of the present invention is useful as a raw material for producing the titanium oxide thin film and the organic functional film of the present invention, as will be described later.
- the second of the present invention is a solution obtained by adding a predetermined chelate compound to an organic solvent solution of a titanium alkoxide compound, and a large excess of water with respect to the titanium alkoxide compound. It is a manufacturing method of the dispersion liquid of this invention characterized by mixing. According to this method The dispersion of the present invention can be easily and efficiently produced using a readily available titanium alkoxide compound.
- titanium alkoxide compound used in the present invention examples include titanium alkoxide, a hydrolysis product of titanium alkoxide, and a composite alkoxide containing a titanium atom.
- titanium alkoxide examples include Ti (OCH), Ti (OC H), Ti (OC H— i)
- Tan alkoxide can be used alone or in combination of two or more
- the titanium alkoxide hydrolysis product is a compound obtained by hydrolyzing the titanium alkoxide in whole or in part with water.
- the amount of water used to obtain the partial hydrolysis product of titanium alkoxide is at least twice the equivalent of titanium alkoxide.
- the composite alkoxide includes (i) a composite alkoxide obtained by a reaction between a titanium alkoxide and a metal alkoxide, (ii) one or two or more titanium alkoxides, and one or more metal salts. And a composite alkoxide obtained by the reaction.
- Examples of the composite alkoxide obtained by the reaction of titanium alkoxide and metal alkoxide (i) include a composite alkoxide obtained by reaction of an alkali metal or alkaline earth metal alkoxide with titanium alkoxide, and the like. Can do.
- Specific examples of the composite alkoxide (i) include BaTi (OR) and SrTi (OR). Where R is
- Metal salts used for the synthesis of the composite alkoxide (ii) include metal chlorides, nitrates, sulfates, acetates, formates, and oxalates.
- Examples of the metal of the metal salt include metals of Group 1 to Group 14 of the periodic table (long period type).
- the chelate compound used in the present invention is not particularly limited as long as it can coordinate to a titanium atom.
- the chelate compound that can be a chelate ligand of the titanium chelate compound The same thing as illustrated as a compound can be mentioned.
- the addition amount of the chelate compound is usually 1 to 5 times mol, preferably 1 to 3 times mol for 1 mol of titanium atom.
- the organic solvent used in the present invention is not particularly limited, for example, alcohols such as methanol, ethanol and isopropanol; halogenated hydrocarbons such as methylene chloride, chloroform and benzene; hexane, Hydrocarbons such as cyclohexane, benzene, toluene, and xylene; Ethers such as tetrahydrofuran, jetyl ether, and dioxane; Ketones such as acetone, methyl ethyl ketone, and methyl isobutyl ketone; Dimethylformamide, N-methylpyrrolidone, and the like Amides; sulfoxides such as dimethyl sulfoxide; methylpolysiloxane, otamethylcyclotetrasiloxane, decamethylcyclopentanesiloxane, methylphenylpolysiloxane, dimethylsilicone, phenylsilicon
- Fluorocarbons such as CF CC1, C1 (CF CFC1) CI;
- organic solvent to be used hydrolysis reaction of the titanium chelate compound can easily proceed to form a dense and uniform titanate oxide thin film at a low temperature.
- Solvents containing alcohols which are preferably water-miscible solvents, are more preferred because a non-coagulated dispersion is obtained.
- Examples of the solvent containing an alcohol include a solvent that is one or more of alcohols, or a mixed solvent such as an alcohol and another organic solvent. Preferred is a mixed solvent.
- the mixed solvent consisting of the alcohol and other organic solvent
- a mixed solvent in which hydrocarbons such as toluene and xylene and lower alcohols such as methanol, ethanol, isopropanol, and t-butanol are combined is preferable.
- the mixing ratio of the mixed solvent is not particularly limited, but it is preferable to use hydrocarbons and lower alcohols in a volume ratio of 99 Zl to 50 Z50.
- the water to be used is not particularly limited as long as it is neutral, but it is preferable to use pure water, distilled water or ion exchange water from the viewpoint of obtaining a dense titanate thin film with few impurities.
- Water can also be used after diluted with an organic solvent.
- water may be added at once, or may be dividedly added in several times, or a constant amount may be added continuously.
- organic solvent used here include the same organic solvents that dissolve the titanium alkoxide compound.
- the amount of water used is a large excess with respect to the titanium alkoxide compound, specifically, 5 times mol or more, preferably 10 with respect to the titanium chelate compound or titanium alkoxide compound. It is more than double mole, more preferably more than 20 mole.
- the maximum amount of water used is determined by the concentration of the titanium chelate compound in the dispersion to be adjusted.
- the amount of water used in a dispersion with a concentration of 0.1% or more is on the other hand, it is 10000 times mol or less, preferably 5000 times mol or less. If the dispersion has a concentration of 0.1% or less, the maximum amount of water used is even greater.
- a chelate compound is added to the organic solvent solution of the titanium alkoxide compound.
- a method of adding water or water diluted with an organic solvent to the solution obtained by addition, a chelating compound in an organic solvent solution of titanium alkoxide compound in water or an organic solvent in which water is suspended or dissolved is preferable.
- the reaction temperature of this hydrolysis reaction is a force that depends on the reactivity and stability of the titanium alkoxide compound used or the chelate compound used. Usually, the temperature ranges from 100 ° C to the reflux temperature of the organic solvent used. The temperature range is preferably from 20 ° C to room temperature.
- the temperature of the reaction solution is adjusted to room temperature. The temperature can be raised to the reflux temperature to further carry out hydrolysis and dehydration condensation reactions.
- the stirring time is usually several minutes for several minutes. In this case, in order to obtain a uniform solution for forming an organic thin film, it is preferable to perform ultrasonic treatment.
- a chelating compound is added to an organic solvent solution of a titanium alkoxide compound.
- an acid, a base or a dispersion stabilizer may be added.
- Specific examples of the acid, base and dispersion stabilizer include the same acid, base and dispersion stabilizer that can be added when the titanium chelate compound is hydrolyzed with water. .
- the solution strength obtained by adding the chelate compound to the organic solvent solution of the titanium alkoxide compound is also isolated from the titanium chelate compound, and the isolated titanium chelate compound is used as the organic solvent.
- the dispersion of the present invention can also be produced by a method of redissolving and adding water.
- insoluble matters may precipitate in the prepared dispersion, these precipitates can be removed by operations such as filtration and decantation to obtain a uniform dispersion.
- the dispersion of the present invention is formed by contacting a surface of a substrate having at least one kind of force selected from the group consisting of metal, ceramics, glass and plastic. It is a thin film.
- the substrate used in the present invention is more preferably a substrate having a plastic force, in which a substrate having at least one kind of force selected from a group force including metal, ceramics, glass and plastic force is preferred.
- the plastic is not particularly limited.
- polyimide, polyamide, polyamideimide, polyphenylene ether, polyetherketone, polyetheretherketone, polyolefin, polyester, polycarbonate, polysulfone, polyether examples thereof include sulfone, polyphenylene sulfide, polyarylate, acrylic resin, cycloolefin polymer, and aromatic polymer.
- the substrate used in the present invention is not particularly limited, but a substrate having an active hydrogen such as a hydroxyl group on the surface thereof may be used for the purpose of improving the adhesion to the thin film.
- the method of bringing the dispersion of the present invention into contact with the substrate surface is not particularly limited, and a known method can be employed. Specific examples include a dip method, a spin coating method, a spray method, a roller coating method, a Meyaba method, a screen printing method, and a brush coating method.
- the titanate oxide thin film of the present invention is capable of decomposing and Z or removing organic substances in contact with the thin film by light irradiation.
- the organic material to be brought into contact with the thin film is not particularly limited, but a monomolecular film is efficient because it can be rapidly decomposed. In particular, in the case of a key compound such as a silane-based surfactant, a monomolecular film is formed on the titanate thin film in a self-organizing manner, which is effective.
- a method for forming a monomolecular film of an organic material there are various methods such as a vapor deposition method, a chemical adsorption method using a solution force in which an organic material is dissolved, and an LB method, any of which may be used.
- the temperature at which the solution is brought into contact with the substrate surface is not particularly limited as long as the solution can maintain stability. Usually, the temperature ranges from room temperature to the reflux temperature of the organic solvent used. To heat to a temperature suitable for contact, either heat the dispersion or the substrate itself.
- ultrasonic waves can be used to promote film formation.
- the step of contacting the surface of the substrate may be performed for a long time at once, or may be performed by dividing the short-time coating into several times.
- a cleaning step may be provided in order to remove excess reagents, impurities, etc. adhering to the film surface.
- the film thickness can be controlled more.
- the cleaning method is not particularly limited as long as it can remove surface deposits!
- a method of immersing the substrate in a solvent capable of dissolving the titanium chelate compound used a method of evaporating by leaving it in the atmosphere under vacuum or normal pressure; and spraying an inert gas such as dry nitrogen gas The method of blowing away;
- the substrate is preferably heated in order to stabilize the film formed on the surface of the substrate.
- the heating temperature can be appropriately selected depending on the type of substrate, the stability of the formed monomolecular film, and the like.
- the thickness of the titanate oxide thin film of the present invention obtained as described above is not particularly limited.
- 1S is usually 500 nm or less, preferably 1 nm to 100 nm, more preferably 5 to 50 nm.
- the titanic acid oxide thin film of the present invention is preferably a thin film containing 2 to 40% of carbon element, which is preferably a thin film containing an organic substance.
- the titanate oxide thin film of the present invention is excellent in flatness.
- the average surface roughness Ra of the titanate oxide thin film of the present invention is 2 nm or less, preferably 1 nm or less. Therefore, as will be described later, a flat organic functional film can be formed on this titanate thin film.
- the titanic acid thin film is a thin film having a property that some thin film physical properties are generally changed by light irradiation.
- the titanate oxide thin film of the present invention is preferably a photocatalytically active film capable of decomposing and Z or removing organic substances in contact with the titanate oxide thin film when irradiated with light. .
- the irradiation light used for the light irradiation is more preferably an ultraviolet ray having a wavelength of 250 to 350 nm, which is preferably an ultraviolet ray.
- the amount of irradiation light is 40 jZcm 2 or less, preferably 5 jZcm 2 or less.
- the titanate oxide thin film of the present invention is more preferably a hydrophilic film having a water contact angle of 20 ° or less when irradiated with light.
- a resist film having a predetermined pattern is formed, or light irradiation is performed in a predetermined pattern, so that only a specific part is formed. Can be converted into a hydrophilic thin film.
- the titanate oxide thin film of the present invention is rapidly formed on the surface of the substrate by using the dispersion of the present invention, and has a small amount of impurities regardless of the type of the substrate used. is there.
- Such titanic acid oxide thin films are not only photocatalytically active films, but also design pattern formation for electrical devices, etc., electronics products, especially electrical appliances, automobiles, industrial equipment, mirrors, eyeglass lenses, etc. It can be applied to ultra-thin coating of heat resistance, weather resistance and wear resistance.
- the titanium oxide thin film functions as a photocatalytic layer, Photolithography can be easily performed.
- a fourth aspect of the present invention is an organic functional film forming solution obtained by adding the dispersion of the present invention to an organic solvent solution of a metal compound having a hydrolyzable group.
- the metal compound used in the present invention is not particularly limited as long as it has at least one hydrolyzable group.
- the hydrolyzable group is not particularly limited as long as it is a group that reacts with water and decomposes. Specifically, an alkoxyl group which may have a substituent; an acyloxy group which may have a substituent; a halogen atom such as a fluorine atom, a chlorine atom, a bromine atom or an iodine atom; an isocyanate group; a cyano group Amino group; or amide group.
- Specific examples thereof include the same as those listed as specific examples of the hydrolyzable group of the titanium chelate compound, and among them, may have a substituent.
- it is an alkoxyl group.
- a specific example of the alkoxyl group may be the same as those listed as specific examples of the alkoxyl group having the substituent of the titanium chelate compound. Can be mentioned.
- the metal of the metal compound used in the present invention is not particularly limited.
- titanium, zirconium, aluminum, silicon, germanium, indium, tin, tantalum, zinc, tungsten, and lead force are selected.
- R 2 is a hydrocarbon group which may have a substituent, may have a substituent 1, a halogenated hydrocarbon group, a hydrocarbon group containing a linking group or a linking group. Represents a halogenated hydrocarbon group containing a group.
- the halogenated hydrocarbon group of the halogenated hydrocarbon group includes a halogenated alkyl group having 1 to 30 carbon atoms and a halogen atom having 2 to 30 carbon atoms. And a halogenated aryl group and a halogenated aryl group. Specific examples include groups in which one or more hydrogen atoms in the hydrocarbon groups exemplified above are substituted with halogen atoms such as fluorine atom, chlorine atom or bromine atom.
- a group in which 2 or more of the hydrogen atoms in the alkyl group having 1 to 30 carbon atoms are substituted with halogen atoms is preferable, and 2 or more of the hydrogen atoms in the alkyl group having 1 to 30 carbon atoms are preferable. More preferred is a fluorinated alkyl group substituted on the top with a fluorine atom. Further, when the fluorinated alkyl group has a branched structure, the branched portion is preferably a short chain having 1 to 4 carbon atoms, preferably 1 to 2 carbon atoms! /.
- fluorinated alkyl group a group having at least one fluorine atom bonded to the terminal carbon atom is preferred, and a group having a CF group portion having three fluorine atoms bonded to the terminal carbon atom is more preferable.
- h represents an integer of 1 to 6, preferably an integer of 2 to 4.
- the group having an alkylene group represented by The number of fluorine atoms in the fluorinated alkyl group is [(number of fluorine atoms in the fluorinated alkyl group) Z (number of hydrogen atoms present in the alkyl group of the same carbon number corresponding to the fluorinated alkyl group) X 100 ] When expressed in%, it is preferably 60% or more, more preferably 80% or more.
- the substituent of the halogenated hydrocarbon group may be a hydrocarbon group or a substituent, and may be a carboxyl group; an amide group; an imide group; An ester group; an alkoxyl group such as a methoxy group or an ethoxy group; or a hydroxyl group.
- the number of these substituents is preferably 0-3! /.
- hydrocarbon group of the hydrocarbon group containing a linking group include the same hydrocarbon groups as those described above as the hydrocarbon group of the hydrocarbon group which may have a substituent.
- halogeno-hydrocarbon group of the halogeno-hydrocarbon group containing a linking group includes: Specifically, the same as those mentioned as the halogeno-hydrocarbon group of the halogeno-hydrocarbon group which may have a substituent may be mentioned.
- the linking group is preferably present between carbon-carbon bonds of a hydrocarbon group or a halogenated hydrocarbon group, or between carbon of the hydrocarbon group and a metal atom M described later.
- R 21 represents a hydrogen atom; an alkyl group such as a methyl group, an ethyl group, an n propyl group or an isopropyl group).
- R 1 is an alkyl group having 1 to 30 carbon atoms, a fluorinated alkyl group having 1 to 30 carbon atoms, or a fluorinated alkyl group containing a linking group. It is preferably a group.
- R 2 More preferable specific examples of R 2 include CH-, CH CH-, (CH) CH-, (CH) C
- M represents at least one metal atom selected from the group force consisting of a key atom, a germanium atom, a tin atom, a titanium atom, and a zirconium atom, and a key atom is particularly preferable.
- R 3 may have a substituent and may represent an alkoxyl group.
- an alkoxyl machine having a substituent it may have a substituent of the titanium chelate compound and listed in the section of an optional alkoxyl group. The same thing is mentioned.
- m represents the valence of M.
- n2 represents an integer of from 0 (m- 1), when n2 is 2 or more, R 2 when Yogu also be different from one phase be the same (m-1) is 2 or more, R 3 May be the same or different.
- M, R 3 , m and n2 represent the same meaning as described above.
- R 4 and R 5 each independently represents a hydrogen atom or a fluorine atom.
- R 6 represents an alkylene group, a beylene group, an ethylene group, an arylene group, or a divalent linking group containing a silicon atom and Z or an oxygen atom. Specific examples of R 6 are shown below.
- W is a hydrogen atom; methyl group, ethyl group, n propyl group, isopropyl group, n butyl group, isobutyl group, sec butyl group, t butyl group, n pentyl group, isopentyl group, neopentyl group, t-pentyl group, n Alkyl groups such as xyl group and isohexyl group; methoxy group, ethoxy group, n-propoxy group, isopropoxy group, n-butoxy group, sec-butoxy group, t-butoxy group, n-pentyloxy group, n xyloxy group Alkoxyl groups such as: fluorine-containing alkyl groups in which some or all of the hydrogen atoms are substituted with fluorine atoms; or some or all of the alkoxyl groups are substituted with fluorine atoms A fluorine-containing alkoxyl group;
- n2 is preferably 0 for forming a high-density organic thin film.
- W may be the same or different.
- R 3 is the same.
- the total content of titanic acid oxide and metal compound in the organic functional film forming solution is preferably 0.1 to 10% by weight in terms of metal oxide.
- the organic functional film-forming solution of the present invention is obtained by a method of adding a predetermined amount of the dispersion of the present invention to (a) an organic solvent solution of a metal compound having a hydrolyzable group. be able to.
- the organic functional film-forming solution of the present invention includes (b) a predetermined amount of the titanium chelate compound added to an organic solvent solution of a metal compound having a hydrolyzable group.
- the dispersion of the present invention is prepared in the system in the presence of a metal compound having a hydrolyzable group.
- a titanium chelate compound is prepared in the system in the presence of a metal compound having a hydrolyzable group, and a large excess of water is added thereto to add the main compound in the system.
- the dispersion of the invention is prepared.
- the amount of water to be added is a large excess with respect to the total number of moles of the titanium chelate compound and metal compound, preferably 5 times mole or more.
- the amount is preferably 10 times mol or more, particularly preferably 20 times mol or more.
- the maximum amount of water used is determined by the concentration of the titanium chelate compound in the dispersion to be adjusted.
- the amount of water used in a dispersion with a concentration of 0.1% or more is on the other hand, it is 10000 times mol or less, preferably 5000 times mol or less. If the dispersion has a concentration of 0.1% or less, the maximum amount of water used is even greater.
- the amount of water to be added is a large excess relative to the total number of moles of the titanium alkoxide compound and the metal compound, preferably 5 times mole or more, more preferably The amount is 10 times mol or more, particularly preferably 20 times mol or more.
- the maximum amount of water used is determined by the concentration of the titanium chelate compound in the dispersion to be adjusted. For example, the amount of water used in a dispersion with a concentration of 0.1% or more is On the other hand, it is 10000 times mol or less, preferably 5000 times mol or less. 0.1% or more If the dispersion has a lower concentration, the maximum amount of water used is further increased.
- hydrolysis or hydrolytic condensation polymerization reaction of the metal compound and the titanium chelate compound can be initiated.
- This reaction normally proceeds smoothly by adding water or water diluted with an organic solvent to an organic solvent solution of a metal compound and a titanium chelate compound.
- a metal compound and a titanium chelate compound or an organic solvent solution of a metal compound and a titanium chelate compound can be added to an organic solvent in which water is suspended or dissolved.
- reaction conditions such as reaction temperature and reaction time, the same conditions as those used in the preparation of the dispersion of the present invention described above can be employed.
- the same acid, base or dispersion stabilizer as described above may be added to the reaction solution to carry out the reaction.
- a fifth aspect of the present invention is an organic functional film-forming substrate characterized by having an organic thin film formed from the organic functional thin film forming solution of the present invention on the surface of the substrate.
- the organic functional film-forming substrate of the present invention is produced by bringing the organic functional film-forming solution into contact with the surface of the substrate or the titanium oxide thin film-forming substrate on which the titanium oxide thin film is formed. can do.
- the substrate to be used is not particularly limited, but is the same as that exemplified as the substrate for forming the titanium oxide thin film, or a titanium oxide formed on the substrate from the dispersion of the present invention.
- Examples include a titanium oxide thin film-forming substrate having a thin film, the latter being preferred.
- the organic functional film-formed substrate in which an organic functional film is formed on the titanium oxide thin film of the substrate is the same as that of photolithography due to the photocatalytic activity function of the titanium oxide thin film. It can be applied to.
- the thickness of the organic functional film obtained is not particularly limited, but is usually 500 nm or less.
- the organic functional film obtained is preferably a thin film containing an organic substance having a carbon element content of 2 to 40%, which is preferably a thin film containing an organic substance.
- an organic material that is in contact with the organic functional film by light irradiation is used. It is preferred that the material can be decomposed and z or removed.
- the organic functional film is preferably a hydrophilic film having a water contact angle of 20 ° or less when irradiated with light.
- a hydrophilic film having a water contact angle of 20 ° or less when irradiated with light.
- the irradiation light used for the light irradiation is more preferably an ultraviolet ray having a wavelength of 250 to 350 nm, which is preferably an ultraviolet ray.
- the amount of irradiation light is 40 jZcm 2 or less, preferably 5 jZcm 2 or less.
- A-1 solution a yellow transparent transparent film-forming solution containing titanium oxide particles (average particle size 4.3 nm) with a titanium oxide equivalent concentration of 2% by weight (hereinafter referred to as “A-1 solution”). All of these operations were performed at room temperature.
- Diisopropoxybis ⁇ cetyl ⁇ Seto inert titanium (manufactured by Nippon Soda Co., Ltd., T-50, Sani ⁇ Chi Tan converted solid content 16.5 wt 0/0) 363. 6 g is 2-butanol 2336. 4g ⁇ this dissolution It was. To this solution, 300 g of ion-exchanged water (22.2 moles with respect to diisopropoxybisacetylacetonate titanium) was slowly added dropwise at room temperature with stirring. After completion of the addition, the mixture was stirred for 2 hours, and then further washed. By standing for 2 days and hydrolyzing, a yellow transparent transparent film-forming solution containing titanic acid oxide particles (average particle size: 5. Onm) with a titanium oxide equivalent concentration of 1 wt% (Hereinafter abbreviated as “A-2 solution”). All of these operations were performed at room temperature.
- Diisopropoxybisacetylacetonate titanium (manufactured by Nippon Soda Co., Ltd., T-50, solid content of acid equivalent of 16.5% by weight) 181.8 g of ion-exchanged water 281.8. Titanium oxide by dripping slowly while stirring at room temperature (417 times the amount of settonate titanium), stirring for 2 hours after the completion of dripping, and then letting it stand for 1 day and hydrolyzing.
- a yellow transparent thin film forming solution hereinafter abbreviated as “A-3 solution”) containing titanium oxide particles (average particle size 4. Onm) with a converted concentration of 1% by weight was obtained. These operations were performed at room temperature.
- a thin film forming solution (hereinafter abbreviated as “A-4 solution”) was obtained. All of these operations were performed at room temperature.
- 24.3 g of ion-exchanged water (3.6 mol per mol of diisopropoxybisacetylacetonatotitanium) was slowly added dropwise with stirring at room temperature to obtain a titanium oxide equivalent concentration of 1% by weight.
- a yellow transparent thin film forming solution containing titanium oxide particles (hereinafter abbreviated as “H-2 solution”) was obtained. All of these operations were performed at room temperature.
- the particle size of the metal compound in the solution was measured with a particle size meter (HPPS, manufactured by Malvern Instruments Ltd).
- the particle size of the solution for thin film formation (A-1 to A-5, H-1, H-2) after storage at room temperature for 3 months was also measured.
- the titanium chelate compound As shown in Table 1, in the A-1 solution to A-5 solution, the titanium chelate compound is hydrolyzed and condensed due to the addition of a large amount of water, and is polymerized. It became a titanium oxide particle with a particle size of 4-10nm with a near V structure!
- Fig. 1 shows the particle size distribution of titanate oxide particles contained in the A-3 solution.
- the horizontal axis represents the average particle diameter (nm), and the vertical axis represents the peak intensity (Intensity).
- the titanate oxide particles contained in the A-3 solution showed very sharp monodispersity.
- the A-3 solution was concentrated under reduced pressure at 50 ° C, and then vacuum dried at 50 ° C to obtain a powder.
- TGZDTA Different Thermogravimetric Analysis
- Figure 2 shows the measurement and analysis results. From Figure 2, the raw material diisopropoxy diacetate The sharp endothermic peaks associated with the decomposition of isopropoxy groups and acetylethylacetonate groups observed in the case of lucacetonate titanium (T-50) were not observed in the case of the A-3 solution. This suggests that almost all of the isopropoxy group and the acetylacetonate group are hydrolyzed in the A-3 solution. The decrease in weight is presumed to be due to the desorption of moisture, isopropanol, acetylacetone alcohol and surface hydroxyl groups adsorbed on the particles.
- the zeta potential was measured by changing the pH of the A-3 solution of Example 3 from 2 to 12 using 0.2 mol Z liter hydrochloric acid and 0.2 mol Z liter aqueous sodium hydroxide solution.
- Figure 3 shows the measurement results. From the zeta potential measurement results of the A-3 solution shown in Fig. 3, the isoelectric point pH was 6.29, which was almost the same as that of anatase-type titanium oxide. Since the pH of the A-3 solution is around 5, it is suggested that the particles are positively charged and stabilized.
- the following thin film forming substrates were prepared, and the surface of each substrate was washed with ethanol and dried. Next, on each substrate surface, the thin film forming solution prepared in Examples 1 to 5 above. (A-1 solution to A-5 solution) and the thin film forming solutions (H-1 solution, H-2 solution) prepared in Comparative Examples 1 and 2 were used with a Mayer bar (bar No. 3 used). It was coated and dried at 60 ° C for 10 minutes to form a thin film. The obtained thin films are designated as J1 to J12, CH-1, and CH-2.
- the film was obtained by drying at 60 ° C, it could be applied to substrates with no heat resistance such as plastic.
- the thin film forming substrate As the thin film forming substrate, the following was used.
- Table 1 summarizes the types of substrates and thin film forming solutions.
- the crystallinity of the thin film was examined by measuring with an X-ray diffractometer.
- the thin films (C-1 to C-12) were all amorphous films having a thickness of 10 to 40 nm.
- the change in haze rate due to the thin film coat was measured and visually observed for the appearance of the thin film and evaluated as follows.
- Evaluation X Change in haze ratio 0.5% or more, with film spots
- Figure 4 shows the average surface roughness (Ra) measured with a scanning probe microscope before and after coating the A-3 solution. From Fig. 4, the average surface roughness of the polyester substrate was 1.37 nm, and when the film was coated, the average surface roughness Ra was 0.70 nm, which improved the surface roughness and smoothed the surface. You can see that
- the distribution in the depth direction of the elements in the thin film was measured using an XPS apparatus (Quntum 2000, ULVAC-FAI).
- the film was scraped at an IkV interval of 0.25 minutes by argon sputtering, and the content of carbon atoms, oxygen atoms, titanium atoms, etc. of the film was measured by X-ray photoelectron spectroscopy and determined by the following formula.
- A-1 Solution Force Figure 5 shows the results of XPS study of elemental distribution in the formed thin film (C-1).
- the substrate is polyester, coated with A-1 solution, and dried at 60 ° C.
- the analysis results in the depth direction. It can be seen that the carbon content of organic matter in the thin film is almost 10% or less, which is almost as low as titanium oxide.
- Fig. 6 shows the results of XPS study of the element distribution in the formed thin film (C-8). Even in this case, the amount of residual carbon in the thin film was very small and less than 10% by weight despite being formed by drying at 60 ° C.
- the thin film (CH-1) similarly formed using the H-1 solution of Comparative Example 1 has a film surface (depth 0 to: LOnm) as shown in FIG. Hydrolysis proceeds with moisture in the air and the carbon content is relatively low. A large amount of charcoal is found inside the membrane (depth 10 to 40 nm). Elemental remains, non-uniformity and weakness!
- a thin film formed in the same manner using the H-2 solution of Comparative Example 2 also has a high content of carbon atoms derived from organic substances in the film, as shown in FIG. It was not a jar and was a weak film.
- the microsyringe force was also dropped on the surface layer of each sample 51, and 30 seconds later, the contact angle of the sample surface was measured using a contact angle measuring device (Elmer Co., Ltd., Model 360S).
- UV irradiation lamps The following two types of UV irradiation lamps were used.
- UV1 germicidal lamp (Toshiba GL-15: 254nm UV), intensity 4mWZcm 2
- UV2 Black light (Toshiba FL15BLB: 365nm UV), intensity 2mWZcm 2
- the thin film was irradiated with the above ultraviolet rays, and the change in surface wettability was evaluated by measuring the contact angle of water.
- the UV irradiation energy was calculated until the water contact angle was 20 ° or less (until it became hydrophilic).
- the contact angle of the thin film of Example 13 showed hydrophilicity of around 20 ° even before irradiation with UV light, and was further hydrophilicized when irradiated with 254 nm UV.
- the thin film was treated with UV ozone for 3 minutes using a UV ozone device (IZEGRAPH Corp., eye ozone cleaning device, low-pressure mercury lamp).
- IZEGRAPH Corp. eye ozone cleaning device, low-pressure mercury lamp.
- the water contact angle of the thin film became hydrophilic to 10 ° or less. The same effect was obtained as when UV1 was used.
- Example 1 was not hydrophilized by irradiation with 365 nm UV light, and in the case of a normal anatase-type titanium oxide photocatalyst, it was different from hydrophilizing with 365 nm light (Reference Example D o
- a thin film C-13 was formed on the substrate B-1 using the A-3 solution.
- a belt comparator with this substrate mounted on top with a high-pressure mercury lamp (made by iGraphics, lamp intensity of 160 WZcm, lamp height of 10 cm, wavelength distribution as shown in Table 3 below) with the thin film C-13 on top. It is mounted on top and passes under the high-pressure mercury lamp at a conveyor speed of 16. 67 cm / sec. I let it go. At this time, the irradiation time with the high-pressure mercury lamp was 0.60 seconds. This operation was repeated 10 times, and the contact angle of each thin film C 13 with water was measured each time. The measurement results are shown in Table 4 below.
- the dispersion of titanium oxide particles of the present invention is obtained by stably dispersing fine particles of titanic acid oxide having an average particle size of the order of nanometers in an aqueous solvent.
- the dispersion of the present invention is stable and hardly changes even after storage for 3 months at room temperature.
- a titanium oxide thin film which is a fine monomolecular film with few impurities.
- a film can be formed quickly and easily.
- the dispersion of titanic acid oxide particles of the present invention is also useful as the material for forming an organic functional film of the present invention.
- an organic functional film applicable to a photolithographic method or the like can be quickly and easily formed on a substrate.
- the organic functional film-forming substrate of the present invention is one in which an organic functional film is formed on the substrate, and can be suitably used for a photolithographic method.
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- 2006-02-13 JP JP2007503641A patent/JP4746032B2/ja active Active
- 2006-02-13 WO PCT/JP2006/302454 patent/WO2006087986A1/ja not_active Application Discontinuation
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JP2009149706A (ja) * | 2007-12-18 | 2009-07-09 | Nippon Soda Co Ltd | 光触媒含有コーティング用組成物 |
JP2014139133A (ja) * | 2008-02-14 | 2014-07-31 | Crystal Usa Inc | コロイド性二酸化チタンゾル |
JP2011521870A (ja) * | 2008-02-14 | 2011-07-28 | ミレニアム・イノーガニック・ケミカルス・インコーポレイテッド | コロイド性二酸化チタンゾル |
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JP2011190152A (ja) * | 2010-03-16 | 2011-09-29 | Tayca Corp | 無定形チタニアゾルおよびその製造方法 |
JP2011236106A (ja) * | 2010-05-13 | 2011-11-24 | Jgc Catalysts & Chemicals Ltd | 酸化チタン系微粒子の製造方法および酸化チタン系微粒子、該酸化チタン系微粒子を用いた抗菌・消臭剤ならびに抗菌・消臭性塗膜形成用塗布液および抗菌・消臭性塗膜付基材 |
JP2012072003A (ja) * | 2010-09-28 | 2012-04-12 | Mitsui Chemicals Inc | チタン錯体溶液、該溶液から得られる薄膜およびその製造方法 |
JP2013072063A (ja) * | 2011-09-29 | 2013-04-22 | Tokai Rubber Ind Ltd | 誘電膜およびその製造方法、並びにそれを用いたトランスデューサ |
US10381547B2 (en) | 2011-09-29 | 2019-08-13 | Sumitomo Riko Company Limited | Dielectric film, method for manufacturing the same, and transducer including the same |
WO2013118442A1 (ja) * | 2012-02-08 | 2013-08-15 | 日本曹達株式会社 | 薄膜積層体 |
JPWO2013118442A1 (ja) * | 2012-02-08 | 2015-05-11 | 日本曹達株式会社 | 薄膜積層体 |
CN105858721A (zh) * | 2016-03-31 | 2016-08-17 | 无锡治洁超材料科技有限公司 | 一种单原子层氧化钛纳米片胶体溶液的制备方法 |
JPWO2019138989A1 (ja) * | 2018-01-12 | 2020-12-24 | 日本化学工業株式会社 | チタンキレート化合物の製造方法 |
Also Published As
Publication number | Publication date |
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CN100594184C (zh) | 2010-03-17 |
JPWO2006087986A1 (ja) | 2008-07-03 |
KR100902529B1 (ko) | 2009-06-15 |
CN101115682A (zh) | 2008-01-30 |
JP4746032B2 (ja) | 2011-08-10 |
KR20070095454A (ko) | 2007-09-28 |
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