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Photocatalyst coating liquid, photocatalyst film and photocatalyst member

A photocatalyst film, photocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of lack of versatility, high surface energy of coating liquid, and achieve excellent stability, The effect of good durability

Inactive Publication Date: 2005-11-23
UBE NITTO KASEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high surface energy of the obtained coating liquid itself, the material of the substrate to be coated is limited, especially for substrates with relatively low surface energy such as various organic substrates, there must be pretreatment steps, etc., so it is expected that it is not universal. sex

Method used

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  • Photocatalyst coating liquid, photocatalyst film and photocatalyst member
  • Photocatalyst coating liquid, photocatalyst film and photocatalyst member
  • Photocatalyst coating liquid, photocatalyst film and photocatalyst member

Examples

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preparation example Construction

[0053] The method for preparing the photocatalyst coating solution of the present invention is not particularly limited, and it can be prepared as follows.

[0054] First, in an organic solvent composed of ethylene glycol monoalkyl ethers or a mixture of ethylene glycol monoalkyl ethers and monohydric alcohols having 4 or less carbon atoms, relative to a predetermined amount of titanium alkoxide, Add 0.5 to 4 times moles, preferably 1 to 3 times moles of water, and a specified amount of inorganic acid, and add titanium alkoxide in the temperature range of 0 to 70°C, preferably in the temperature range of 20 to 50°C for hydrolysis After the binder obtained by the condensation reaction, a predetermined amount of anatase crystal titanium oxide sol or colloidal silica is added to disperse it uniformly, thereby preparing the photocatalyst coating liquid of the present invention.

[0055] The photocatalyst coating solution prepared in this way is prepared by known methods such as di...

manufacture example 1

[0117] Fabrication of Thin Films with Organic-Inorganic Composite Gradient Membranes

[0118] After dissolving 0.1 g of 2,2'-azobisisobutyronitrile in a mixed solution of 10.9 g of methyl methacrylate and 1.36 g of γ-methacryloxypropyl trimethoxysilane, stir at 75 The reaction was carried out at °C for 3 hours, and a copolymer having a weight average molecular weight of about 70,000 in terms of polystyrene obtained by gel permeation chromatography (GPC) was obtained. 1.0 g of this copolymer was dissolved in 100 ml of methyl isobutyl ketone to obtain an organic component solution having a concentration of 10 g / liter.

[0119] Tetraisopropyl titanium alkoxide 10.0g (0.036 mole) is dissolved in solution after 19.9g (0.221 mole) of ethylene glycol ethyl ether, stirs and slowly drips into 60 mass % nitric acid aqueous solution 1.68g (0.016 mole), water 0.61g ( 0.034 mol) and 7.8 g (0.087 mol) of ethylene glycol ether were stirred at 30° C. for 4 hours to obtain an inorganic compon...

manufacture example 2

[0122] Prepare the binder solution

[0123] After 10.00 g (0.035 moles) of tetraisopropyl titanium alkoxide was dissolved into a solution in 19.9 g (0.221 moles) of ethylene glycol ether, stirred and slowly dripped into 60 mass % nitric acid aqueous solution 1.68 g (0.016 moles), water 0.61 g ( 0.034 mol) and 7.80 g (0.087 mol) of ethylene glycol ether, and then stirred at 30° C. for 4 hours. Thereafter, add 77.60 g (0.863 moles) of ethylene glycol ether to prepare TiO 2 The converted solid content concentration was a binder solution of 2.38% by mass.

[0124] Here, the water in the binder solution, including the water (0.67 g) contained in the 60 mass % nitric acid aqueous solution and the added water (0.61 g), totaled 1.28 g, and the nitric acid contained in the 60 mass % nitric acid aqueous solution was 1.01 g .

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Abstract

The present invention relates to a photocatalyst coating liquid capable of forming on an organic substrate a photocatalyst film that is excellent in photocatalytic functions such as super-hydrophilic nature and the performance of maintaining super-hydrophilic nature in a dark place and that has excellent durability, the photocatalyst coating liquid being excellent in stability, and a photocatalyst film formed therefrom, and there are provided a photocatalyst coating liquid comprising (A) titanium oxide fine particles formed of anatase type crystal, (B) colloidal silica and (C) a binder formed of a hydrolysis-condensate of a titanium alkoxide, and having, based on the total solid content, a component (A) content of 5 to 50 mass%, a component (B) content, as a solid content, of 25 to 75 mass% and a component (C) content, as a TiO2 slid content, of 10 to 55 mass%, and a photocatalyst film formed from the above coating liquid.

Description

technical field [0001] The present invention relates to a photocatalyst coating liquid, a photocatalyst film, and a photocatalyst member. More specifically, the present invention particularly relates to photocatalytic functions such as superhydrophilicity and maintaining superhydrophilicity in the dark, and the ability to form on organic substrates that maintain these functions for a long time and have good durability. A photocatalyst film, a photocatalyst coating solution with excellent stability, a photocatalyst film with the above-mentioned characteristics formed by the coating solution, and a photocatalyst member such as an antifouling film having the photocatalyst film on the surface. Background technique [0002] It is known that photocatalytically active materials (hereinafter simply referred to as photocatalysts) generate electrons in the excited conduction band and generate holes in the valence band when irradiated with light having an energy higher than the energy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/00B01J37/00C01G23/047C09C1/36C09D185/00
CPCB01J37/0009C09D185/00C09C1/3653B01J35/004C01G23/047B01J35/39C08L2666/54B01J21/06B01J21/08
Inventor 田中尚树铃木宏和小池匡
Owner UBE NITTO KASEI CO LTD
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