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Photocatalytic film, method for production of photocatalytic film, article, and hydrophilization method

A photocatalytic film and hydrophilization technology, which is applied in the fields of hydrophilization, articles and hydrophilization, can solve complex surface treatment and other problems, and achieve the effect of efficient manufacturing

Inactive Publication Date: 2010-12-01
UBE NITTO KASEI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these proposals all require complex surface treatment to prevent the high oxidative power of anatase titanium oxide from affecting the base material, and these proposals are accompanied by the need for micron-order thickness due to surface segregation of titanium oxide, and the titanium oxide particles themselves Only particles with a diameter of a few microns can form a film and many other constraints

Method used

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  • Photocatalytic film, method for production of photocatalytic film, article, and hydrophilization method
  • Photocatalytic film, method for production of photocatalytic film, article, and hydrophilization method
  • Photocatalytic film, method for production of photocatalytic film, article, and hydrophilization method

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Embodiment

[0257] Hereinafter, the present invention will be described in more detail in conjunction with examples, but the present invention is not limited by these examples.

[0258]In addition, various evaluation and measurement methods are as follows.

[0259] (1) Conditions of carbon arc sunlight weather resistance test machine (SWM)

[0260] Device name: Suga Tester Co., Ltd. "Sunshine Weather Resistance Tester S300"

[0261] Setting conditions: illuminance 255±55W / m 2 , irradiated light wavelength range 250 ~ 1200nm

[0262] Cycle: 102 minutes of irradiation, 18 minutes of irradiation + rainfall, 2 hours as a cycle

[0263] Black plate temperature: 63±3℃

[0264] Relative humidity: 55±5%RH

[0265] (2) Constant temperature and humidity treatment

[0266] Device name: "IG-42M" manufactured by Yamato Science Co., Ltd.

[0267] (3) Transmission electron microscope (TEM) observation

[0268] (i) Sample preparation (in the case of a resin substrate): After cutting to an appropr...

Synthetic example 1

[0343] Synthesis of Hydrolyzed Condensation Liquid of Titanium Alkoxide

[0344] To 149 g of ethyl cellosolve, 75.7 g of titanium tetraisopropoxide (trade name: A-1, manufactured by Nippon Soda Co., Ltd.) was added dropwise while stirring, to obtain a solution (A). A mixed solution of 58.3 g of ethyl cellosolve, 4.55 g of distilled water, and 12.6 g of 60 mass % concentrated nitric acid was added dropwise to this solution (A) while stirring, to obtain a solution (B). Then, the solution (B) was stirred at 30° C. for 4 hours to obtain a hydrolysis-condensation liquid (C) of titanium alkoxide.

Synthetic example 2

[0346] Fabrication of PET film with weather-resistant primer

[0347] A hindered amine-based light stabilizer ( HALS) UV-absorbing coating agent (manufactured by Nippon Shokubai Co., Ltd., UW series UV-G301) mixed with 12 parts by mass of isocyanate-based hardener (manufactured by Sumitomo Bayer Urethane Co., Ltd., Desmodur N3200) Ethyl acetate solution, the thickness of the dry film reaches 6μm, and then it is thermally cross-linked to make a PET film (E) with a weather-resistant primer.

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PUM

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Abstract

Disclosed is a photocatalytic film which contains a photosemiconductor particle in at least one main surface thereof, wherein the main surface can be hydrophilized by the irradiation with light. When the photocatalytic film is irradiated with a light having a half-value width of 15 nm or less after being kept in a dark place, the rate of hydrophilization is less than 2 (1 / deg / min / 105) in the region where the irradiated light has a wavelength of 370 nm or longer, and 2 (1 / deg / min / 105) or more in at least a part of the region where the irradiated light has a wavelength of 300 to 360 nm.

Description

technical field [0001] The present invention relates to a photocatalytic film, a manufacturing method of the photocatalytic film, an article and a hydrophilization method. In more detail, the present invention relates to a novel photocatalytic film that does not require special treatment on the surface of titanium oxide, exhibits photoexcited superhydrophilicity under the irradiation of a solar light source, but shows little decomposition activity, and a method for efficiently producing the photocatalytic film. A method, an article having the above-mentioned photocatalyst film on its surface, and a hydrophilization method using the article. Background technique [0002] In general, photocatalysts excite electrons in the conduction band and generate holes in the valence band when irradiated with light having an energy higher than the band gap. Moreover, it is known that excited electrons reduce surface oxygen to superoxide anion (·O 2- ), and the holes oxidize the surface h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/02B01J21/06B01J37/10B01J35/00
CPCB01J35/0033C02F1/32B01J37/10B01J31/06B01J37/0215B01J21/063C02F2305/10Y02W10/37Y10T428/25B01J35/33
Inventor 田中尚树北川武末松大辅高见和之
Owner UBE NITTO KASEI CO LTD