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Antibacterial, antiviral photocatalytic titanium oxide, and antibacterial, antiviral photocatalytic titanium oxide slurry dispersed in a neutral area, as well as method for manufacturing same

A technology of photocatalyst and manufacturing method, which is applied in the fields of antibacterial and antiviral coating films, antibacterial and antiviral articles, and antibacterial and antiviral coating agents, and can solve the problems of low copper content addition, undisclosed antibacterial and antiviral properties, and inability to Solve problems such as solid-liquid separation of dispersion liquid, achieve excellent design, good antibacterial and antiviral effects

Inactive Publication Date: 2015-10-28
SHOWA DENKO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Patent Document 9 does not disclose antibacterial and antiviral properties
In addition, there is no description of using phosphoric acid or the like as a simple dispersant or reacting copper components with phosphoric acid.
In addition, the copper component exists as +1 valence or 0 valence in the coating film, and there is a problem of color spots due to oxidation
Furthermore, when a large amount of copper component is added, the problem of solid-liquid separation of the dispersion cannot be solved, and the addition amount of the copper component has to be kept low.

Method used

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  • Antibacterial, antiviral photocatalytic titanium oxide, and antibacterial, antiviral photocatalytic titanium oxide slurry dispersed in a neutral area, as well as method for manufacturing same
  • Antibacterial, antiviral photocatalytic titanium oxide, and antibacterial, antiviral photocatalytic titanium oxide slurry dispersed in a neutral area, as well as method for manufacturing same
  • Antibacterial, antiviral photocatalytic titanium oxide, and antibacterial, antiviral photocatalytic titanium oxide slurry dispersed in a neutral area, as well as method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0104] In an aqueous solvent, the water-soluble ortho-copper salt is reacted with at least one selected from phosphate and pyrophosphate to obtain at least one selected from water-insoluble copper phosphate and copper pyrophosphate (II), further Disperse 50% of titanium oxide particles having a cumulative particle size (D50) of 5 to 200 nm in an aqueous medium, and at the same time, at least one selected from the water-insoluble copper (II) phosphate and copper pyrophosphate (II) is supported on the At least a part of the surface of the titanium oxide particles is used to obtain an antibacterial and antiviral photocatalyst titanium oxide dispersion, and then the antibacterial and antiviral photocatalyst titanium oxide is separated from the dispersion, and the separated antibacterial and antiviral photocatalyst titanium oxide is washed. Afterwards, it was dispersed in an aqueous solvent.

[0105] Examples of methods for separating antibacterial and antiviral photocatalyst titan...

manufacture example 2

[0110] In an aqueous solvent, the water-soluble ortho-copper salt is reacted with at least one selected from phosphate and pyrophosphate to obtain at least one selected from water-insoluble copper phosphate and copper pyrophosphate (II), further Disperse 50% of titanium oxide particles having a cumulative particle size (D50) of 5 to 200 nm in an aqueous medium, and at the same time, at least one selected from the water-insoluble copper (II) phosphate and copper pyrophosphate (II) is supported on the At least a part of the surface of the titanium oxide particles is used to obtain an antibacterial and antiviral photocatalyst titanium oxide dispersion, and then an aqueous solvent is further added to the antibacterial and antiviral photocatalyst titanium oxide dispersion, and ultrafiltration is performed simultaneously to separate the The antibacterial and antiviral photocatalyst titanium oxide is then dispersed in an aqueous solvent.

[0111] The separation and washing of the ant...

Embodiment 1

[0142] Anatase-type titanium oxide (50% cumulative particle size (D50%) (light scattering intensity standard): 80 nm, manufactured by Showa Titanium Co., Ltd.) was dispersed in 1000 mL of distilled water while stirring to obtain a titanium oxide slurry material. A copper (II) chloride aqueous solution was obtained by dissolving 13.3 g of copper (II) chloride dihydrate 5 parts by mass (addition amount) based on copper with 100 parts by mass of titanium oxide in 10 mL of distilled water. 10 mL of this copper (II) chloride aqueous solution was thrown into the titanium oxide slurry while stirring, and the slurry was heated to 40°C. 8.5 g of sodium phosphate was dissolved in 50 mL of distilled water to obtain a sodium phosphate aqueous solution. Next, 50 mL of sodium phosphate aqueous solution was injected|thrown-in to the slurry heated at 40 degreeC, and it reacted for 1 hour, stirring. Then, the mixed solution was filtered with 5C filter paper, washed with 300 mL of distilled w...

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Abstract

Provided are a photocatalytic titanium oxide capable of demonstrating antibacterial and antiviral effect when used in various applications, as well as an antibacterial, antiviral photocatalytic titanium oxide slurry in which the photocatalytic titanium oxide has been stably dispersed in a neutral area, and a method for manufacturing same. An antibacterial, antiviral photocatalytic titanium oxide, wherein 0.1 to 50 mass by weight in terms of the copper standard of at least one species selected from copper (II) phosphate and copper (II) pyrophosphate with respect to 100 mass by weight of titanium oxide particles is carried on at least the surface of the titanium oxide particles, and the 50% cumulative particle diameter (D50) (light scattering intensity standard) is 5 to 200 nm.

Description

technical field [0001] The present invention relates to a photocatalyst titanium oxide having antibacterial and antiviral properties, an antibacterial and antiviral photocatalyst titanium oxide slurry obtained by stably dispersing the photocatalyst titanium oxide in a neutral region, and a production method thereof, as well as a slurry containing antibacterial and antiviral materials. Antibacterial and antiviral coating agent for viral photocatalyst titanium oxide slurry, antibacterial and antiviral coating film and antibacterial and antiviral articles. Background technique [0002] In recent years, new highly pathogenic viruses such as avian influenza and SARS and fungicide-resistant bacteria such as MRS have emerged. As one of the comprehensive measures to ensure a hygienic indoor environment and prevent nosocomial infections, it is desired to maintain a safe environment. In particular, in public facilities such as hospitals, viruses and highly pathogenic microorganisms te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/02A01N25/04A01N59/16A01N59/20A01P1/00A01P3/00B01J27/18C09D5/14C09D7/12C09D201/00B01J35/00C09D7/61
CPCA01N59/20A01N59/16B01J21/06B01J23/72B01J27/18B01J27/185B01J35/004B01J35/02B01J37/0215B01J37/031C09D5/14C09D7/12C09D201/00C09D7/61B01J35/39A01N2300/00A01N25/04
Inventor 李定黑田靖
Owner SHOWA DENKO KK
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