Titanium oxide-containing material and process for preparing the same

A manufacturing method and technology of titanium oxide, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., can solve the problems of titanium oxide falling off, affecting material properties, and titanium oxide deterioration.

Inactive Publication Date: 2000-06-21
森敏股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the method of incorporation is followed, it is difficult for titanium oxide to be carried on the surface of the material, so that various functions such as antibacterial, deodorizing and antifouling cannot be effectively exerted.
Therefore, in order to make the necessary amount of titanium oxide exist on the surface of the material, a large amount of titanium oxide must be doped. As a result, not only the characteristics of the material are affected, but also the cost is disadvantageous.
In addition, materials made of organic substances such as synthetic fibers and resins tend to degrade the titanium oxide-carrying part, which often causes the titanium oxide to fall off.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Titanium oxide was introduced into synthetic fibers (type: polyester fibers) and synthetic fibers containing titanium oxide were produced in the following procedure.

[0043] First, titanium tetrafluoride is dissolved in water at a ratio of 2.0% owf. The above-mentioned synthetic fibers were immersed in the aqueous solution, and treated at normal temperature for 30 minutes. Then, a mixture of boric acid: citric acid: D, L-malic acid = 0.5: 1: 1 was added to the above aqueous solution at a ratio of 0.5% owf, and treated at 50°C for 30 minutes . At this point the pH of the solution was 3. Then, washing with water was carried out to obtain the desired titanium oxide-containing synthetic fiber.

[0044] The synthetic fibers containing titanium oxide thus obtained were investigated for their antibacterial properties, deodorizing properties, antifouling properties, and shedding of titanium oxide by the following methods.

[0045] (antibacterial)

[0046] The investigatio...

Embodiment 2

[0066] In addition to using stainless steel (20cm 2 ) to replace the polyester fiber, the remaining titanium oxide was introduced into the surface of the stainless steel according to the same method as in the above-mentioned Example 1. Then, the stain resistance and deodorization properties of the stainless steel were investigated in the same manner as above. The results are shown in Table 5 and Table 6 below. In Table 6 below, the treated stainless steel represents the titanium oxide-containing stainless steel of Example 2, and the untreated stainless steel represents stainless steel that has not been treated with titanium oxide.

[0067] table 5

[0068] (deodorization)

[0069] early stage

[0070] Table 6

[0071] (fouling resistance)

[0072] initial coloring

[0073] From the results of Table 5 and Table 6 above, it can be seen that the titanium oxide-treated stainless steel has excellent antifouling and deodorizing properties. It was also c...

Embodiment 3

[0075] Using titanium oxide and gold, polyester fibers were treated as shown below. First, titanium ions were generated in the solution using titanium fluoride in the same manner as above. In addition, chloroauric acid (0.001 by weight relative to the above-mentioned titanium oxide) was added to this solution to simultaneously generate titanium ions and gold ions from this solution. Then, a mixture of boric acid, citric acid, and D,L-malic acid (weight mixing ratio: 0.5:1:1) was added to the above solution in the same manner as in Example 1. As a result, generated titanium oxide ions and gold ions are deposited on the surface of the polyester according to the same principle as electroless plating (electroless plating), and are strongly bonded to the polyester.

[0076] Then, the antibacterial, deodorizing, and antifouling properties of the titanium oxide and gold-treated polyester fibers thus obtained were investigated in the above-mentioned manner. The results are shown in ...

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PUM

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Abstract

A titanium oxide-containing material having a surface plated with titanium oxide. It is prepared by dissolving titanium fluoride (such as titanium tetrafluoride) in an amount of 2.0 % owf in water, immersing a raw material in the obtained aqueous solution to treat the material with the aqueous solution at room temperature for 30 min, and adding a 0.5 : 1 : 1 (on a weight basis) mixture of boric acid, citric acid, and DL-malic acid in an amount of 0.5 % owf to the aqueous solution to treat the material with the aqueous solution at 50 DEG C for 30 min, followed by washing with water. The raw materials usable herein include synthetic fibers, metals, glass, and woods, and may be in the form of sheet, plate, fiber, rod, or the like. Introduction of a noble metal, such as gold or silver, in addition to titanium oxide, into the surface of the material enables the acceleration of the photocatalytic action of titanium oxide.

Description

technical field [0001] The present invention relates to a material containing titanium oxide, which has various functions such as deodorization, antifouling and antibacterial due to the photocatalytic action of titanium oxide, and a method for producing the same. Background technique [0002] The fact that titanium oxide has a photocatalytic action by which organic matter can be decomposed has been known in the past. The mechanism of decomposition of organic substances due to this photocatalytic action is as follows. That is, when light such as visible light or ultraviolet light is irradiated on titanium oxide, it will cause charge decomposition and generate electrons and holes with strong oxidizing power. This hole reacts with water vapor or oxygen in the air and produces OH groups or O 2 - Such a reactive core can instantly decompose the organic matter existing around it. Now, using this photocatalysis, titanium oxide can be used in environmental ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/053C03C17/25
CPCC03C17/256C03C2217/212C01G23/0536C03C2218/111C03C2217/71C01G23/00
Inventor 森竹典
Owner 森敏股份有限公司
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