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Glass article with photocatalyst film

A technology for photocatalyst films and articles, applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, chemical/physical process, etc., can solve problems such as decrease in reflectivity, and achieve the effect of increasing transmittance

Active Publication Date: 2017-05-24
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the refractive index of the photocatalyst film is sufficiently reduced, the reflectance of light incident on the glass plate can be reduced

Method used

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  • Glass article with photocatalyst film
  • Glass article with photocatalyst film
  • Glass article with photocatalyst film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 22.5 g of ethylene glycol ethyl ether (manufactured by Sigma-Aldrich; organic solvent), 1.1 g of tetraethoxysilane (KBE-04 by Shin-Etsu Chemical Co., Ltd.; binder supply source), colloidal silica fine particles Dispersion (PL-7 manufactured by Fuso Chemical Industry Co., Ltd.; solid content concentration 22.9%, primary particle diameter (average particle diameter) 75nm, dispersion medium: water) 12.7g, titanium oxide fine particle dispersion liquid (solid content concentration 30%, primary particle diameter (average particle diameter) 10nm, dispersion medium: water) 2.2g, 1N hydrochloric acid (hydrolysis catalyst) 0.4g weighed in the glass container, it was stirred in the oven kept at 40 ℃ for 8 hours to obtain a high concentration solution. The solid content concentration in this high-concentration solution is 10%, and silicon oxide particles (colloidal silica particles), titanium oxide particles, and SiO 2 The mass ratio of the binder components is 75:17:8. Next, 234...

Embodiment 2～8 and comparative example 1～7

[0077] Except having changed the quantity of each component which comprises a coating liquid like description in Table 1, it carried out similarly to Example 1, and obtained the glass plate with a photocatalyst film. In addition, in some comparative examples, propylene glycol or 3-methoxybutanol was added to the coating liquid. Table 1 shows the evaluation results of the above characteristics. Also, use Figure 7 (comparative example 1) and Figure 9 (Comparative Example 5) shows the state obtained by observing the formed photocatalyst film with SEM, with Figure 8 (comparative example 1) and Figure 10 (Comparative example 5) shows the state which observed the formed photocatalyst film by AFM.

[0078] When the cross section of the glass plate with the photocatalyst film obtained by each Example was observed by SEM, it could be confirmed that in the photocatalyst film, more than 80% of the titanium oxide particles were concentrated in the lower 60% region of the film thic...

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Abstract

The present invention provides a glass article comprising a photocatalyst film (1) comprising silicon oxide particles (6) and titanium oxide particles (5), capable of maintaining the film strength and photocatalytic function of the photocatalyst film (1) , so that the reflection suppression function is improved, and the transmittance is further increased. In the photocatalyst film (1), silicon oxide is contained in a range of 72 to 79% by mass relative to the total amount of silicon oxide particles (6), titanium oxide particles (5) and a binder component mainly composed of silicon oxide. The particles contain titanium oxide particles in the range of 13 to 18 mass%, and contain the binder component in the range of 8 to 14 mass%. The average particle diameter of the silicon oxide particles is 30 to 200 nm, the average particle diameter of the titanium oxide particles is 5 to 20 nm, and the average particle diameter of the silicon oxide particles is at least 5 times the average particle diameter of the titanium oxide particles. When the film thickness of the photocatalyst film is T, 80% or more of the titanium oxide particles are concentrated in the range from the surface of the glass plate (2) to 0.6T.

Description

technical field [0001] The present invention relates to a glass article including a glass plate and a photocatalyst film. More specifically, the present invention relates to improvement of a photocatalyst film having both a photocatalytic function and a light reflection suppressing function. Background technique [0002] A glass plate utilizing the photocatalytic function of a titanium oxide film is produced and marketed as a so-called "self-cleaning glass". As we all know, the photocatalytic function of the titanium oxide film can decompose the organic matter attached to the surface of the glass plate to weaken the adhesion of the organic matter, and use rainwater to clean the organic matter. [0003] The refractive index of titanium oxide (about 2.5 in the case of anatase type) is higher than that of glass, so when a titanium oxide film is formed on the surface of a glass plate, the light reflectance of the glass plate increases. Therefore, a photocatalyst film capable o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/23B01J21/08B01J35/02C03C17/25B01J35/00
CPCC03C2217/71C03C17/007C03C2217/45C03C2217/477C03C2217/478C03C17/23B01J37/0219B01J21/063Y10T428/256B01J21/08B01J35/30B01J35/23B01J35/40B01J35/39B01J37/0236C03C17/25B01J35/00C03C2217/42C03C2217/48G02B27/0006G02B1/18C03C17/256C03C2217/445
Inventor 籔田武司近藤史佳河津光宏
Owner NIPPON SHEET GLASS CO LTD
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