JPH08266864A - Curtain - Google Patents

Abstract

PURPOSE: To easily destroy an offensive odor from one's cigarette, etc., in a room by the action of a photocatalytic reaction without disposing a special deodorizing device by carrying a photocatalyst on the surface of a curtain. CONSTITUTION: In order to destroy an offensive odor from one's cigarette, a house pet, a toilet stool, etc., by a photocatalytic reaction, a photocatalyst is carried on the surface of a curtain of org. fibers such as a cloth or lace curtain or a curtain of inorg. fibers such as glass or ceramic fibers. The photocatalyst is a photocatalyst causing a photocatalytic reaction under low energy light of <=4eV such as light from a fluorescent lamp or an incandescent electric lamp used in everyday life and especially titanium oxide is used. When titanium oxide is carried on a curtain, an SiO2 -contg. material such as SiO2 - contg. glass or ceramic fibers are suitable for use as the material of the curtain from the viewpoint of bonding strength to titanium oxide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curtain capable of decomposing and removing various odors in a room.

[0002]

2. Description of the Related Art Conventionally, as a device for removing various odors in a room, a light transmission surface of 254 nm was formed on the upper part of a fluorescent lamp as shown in Japanese Utility Model Laid-Open No. 3-30314 and passed through it. BACKGROUND ART A fluorescent lamp illuminator with a deodorizing mechanism that excites a photocatalyst provided above a fluorescent lamp with light of 254 nm to perform deodorizing is known. Air cleaners and the like are also known.

[0003]

However, in the case of the above-described conventional lighting fixture, a new manufacturing process which is not performed in the usual manufacturing process of forming a surface not coated with fluorescent paint inside the fluorescent lamp,
It has to go through a very difficult process. In addition, the material of the fluorescent lamp must also be one that transmits light of 254 nm, and expensive quartz glass must be used for that, which leads to an increase in cost. For photocatalyst, 25
Since the photocatalytic reaction occurs only with light having a high energy of 4 nm (4.88 eV), it is also disadvantageous in terms of energy cost. Note that this 254 nm light is generally used as a germicidal lamp and is harmful to the human body, especially to the eyes. Therefore, it is not preferable to use light of this wavelength.

Further, an apparatus newly installed in the room such as an air purifier is expensive, and in addition to its initial cost, running costs such as utilities and maintenance such as periodical cleaning are required. The purpose of the present invention is to
It is an object of the present invention to provide a curtain capable of decomposing and removing various odors in a room with light from a normal fluorescent lamp or incandescent lamp or sunlight without providing a complicated device or a new device.

[0005]

The curtain of the present invention is characterized in that a photocatalyst is carried on the surface thereof in order to achieve the above object. The "curtain" as used in the present invention includes ones made of general organic fibers such as cloth curtains and lace curtains, and heat-resistant curtains made of inorganic fibers made of glass or ceramic. However, the present invention is not limited to these types.

As the photocatalyst, one that causes a photocatalytic reaction with low energy light of 4 eV or less, particularly titanium oxide is suitable. The titanium oxide may be in the rutile type or the anatase type, or in the coexisting form thereof. The rutile form is suitable for reacting with lower energy light, and the anatase form is suitable for increasing the activity of the reaction.

When titanium oxide is carried on the curtain, the material of the curtain is S from the viewpoint of the bonding force with the titanium oxide.
Those containing iO ₂ are preferred. Specifically, S
A curtain composed of glassy or ceramic inorganic fibers containing iO ₂ is suitable. In the case where the material itself of the curtain does not contain SiO ₂ in the surface of the curtain may be provided containing SiO ₂ layer.

When the curtain is composed of a glassy or ceramic inorganic fiber containing SiO ₂ and carries a titanium oxide photocatalyst, it is desirable to bond the interface with a Ti--O--Si bond. As described below, the Ti-O-Si bond can be used for bonding by using a solution of a titanium oxide precursor that becomes titanium oxide by heating and an organic resin as a starting material. As the titanium oxide precursor, titanium alkoxide, titanium chloride, titanium sulfide, titanium acetate and the like can be used. However, when alcohols are used as a compatible solvent, titanium is used because of the compatibility with the organic resin. Alkoxide,
When water is used as a compatible solvent, titanium chloride, titanium sulfide, and titanium acetate are preferably selected. However, when the precursor and the organic resin are compatible with each other, any combination may be selected.

As the organic resin, acrylic resin,
Olefin-based compounds are generally used, but the decomposition temperature is 2 because oxidative decomposition is required in the firing process during the manufacturing process.
It is sufficient that the resin is at least 00 ° C. and not more than the firing temperature, and it is compatible with the titanium oxide precursor, and is not limited by the type or molecular weight of the monomer. As described above, a solution obtained by dissolving the selected precursor and the organic resin in a compatible solvent is used as a starting material for producing a titanium oxide photocatalyst. That is, in order to obtain a photocatalyst from this starting raw material, a curtain serving as a carrier may be dipped in this raw material liquid, or the raw material liquid may be applied or sprayed on the curtain, dried, and then baked. This drying is 1
It is preferably carried out at 50 ° C. or lower for 30 minutes or longer. The temperature rising rate from the liquid loading to the drying and the drying to the firing is preferably 10 ° C./min or less. The final firing step needs to be performed in consideration of the heat resistance of the base material, but it is preferable to perform firing at a temperature of 550 ° C or lower.

When the one carrying the photocatalyst is a curtain made of an organic fiber such as a natural fiber or an organic synthetic fiber, for example, a precursor of the above titanium oxide or a titanium oxide fine powder having a particle size of 1 micron or less is adhered to the organic system. It is also possible to disperse or mix with the agent and apply or spray it onto the curtain of organic fibers. Further, the above photocatalyst supporting noble metals is also within the scope of the present invention. In this case, precious metals include platinum, palladium,
Noble metals such as rhodium, gold, silver and copper, or nitrates, sulfates and acetates of these noble metals are preferable. As a method for supporting noble metals, for example, photodeposition method.For example, spraying metal ion water, dipping metal ion water and then irradiating light, or irradiating light while dipping metal ion water is used for photoreduction. It is easy to use the method of fixing by plating.

[0011]

Since the photocatalyst such as titanium oxide has a small band gap of 3 to 3.2 eV, it can be easily excited by light having a small energy. The light of fluorescent lamps and incandescent lamps, which are usually used in daily life, contains almost no ultraviolet light having high energy of 4.5 eV or more, but contains light having energy more than the band gap of titanium oxide. Therefore, the photocatalyst used in the present invention is easily excited by these ordinary lights to cause a photocatalytic reaction. Also,
3.7 eV of sunlight is transmitted through normal transparent window glass
The energy light is as follows, but since it also has energy equal to or higher than the band cap of titanium oxide, the photocatalyst used in the present invention is easily excited by the sunlight passing through these window glasses to cause a photocatalytic reaction. Due to this photocatalytic reaction, odors such as nicotine, tar, tar and the like that are produced in the room such as cigarette odor, pet odor and toilet odor are easily decomposed.

Further, in the present invention, titanium oxide as a photocatalyst is supported on a curtain composed of an inorganic fiber containing SiO ₂ , and the surface of the curtain and the interface of the photocatalyst are bonded by a Ti—O—Si bond. In the case of using a mixture of an organic resin and a titanium oxide precursor as a starting material of the photocatalyst, the heat of combustion generated by the oxidative decomposition reaction of the organic residues constituting them is applied to the surface of the curtain.
i-O-Si bond is formed. Thus, the base material and the photocatalyst are joined together by a strong bond, and the photocatalyst does not fall off.

According to the photocatalyst-carrying curtain of the present invention produced by the above method, the photocatalytic reaction proceeds due to the light generated from the usual lighting equipment such as a fluorescent lamp or an incandescent lamp and the sunlight transmitted through the window glass. Offensive odors generated indoors such as tobacco odors in the surrounding area are decomposed and removed. Moreover, even if a precious metal is supported on the surface of the photocatalyst such as titanium oxide, a photocatalytic reaction is caused, but if a metal such as silver or copper having an antibacterial effect is supported, the antibacterial effect due to a strong oxidizing / reducing power is exerted. In addition to the photocatalyst having the above, the antibacterial property against MRSA, Escherichia coli, and Pseudomonas aeruginosa can be further enhanced.

[0014]

【Example】

(Example 1) 760 g of titanium isopropoxide, which is a precursor of titanium oxide, was applied to a curtain made of glass fibers.
And 400 g of organic resin were dissolved in 840 g of ethyl alcohol to apply a solution. This curtain, 1 at 60 ℃
After drying for 1 hour, the temperature was raised to 350 ° C. at a rate of 1 ° C./min and baked at 350 ° C. for 12 hours. By this treatment, the organic resin was completely removed, and titanium isopropoxide was changed to titanium oxide mainly composed of anatase type, and the surface of the glass fiber constituting the curtain could be firmly coated with titanium oxide. The thickness of the obtained titanium oxide was about 0.3 micron.

Experiments for deodorizing and deodorizing effects were conducted as follows. Two meeting rooms A and B were used, each having a size of 3.6 m × 2.7 m and a ceiling height of 2.6 m. In each room, six 1.2 m fluorescent lamps (40 W) are attached to the ceiling and the lights are turned on. The experiment was done at night, so there is no sunlight.
Two curtains with a height of 1750 mm and a width of 900 mm are attached to each of the two chambers. Two curtains supporting the photocatalyst are attached to the chamber A, and two ordinary curtains not supporting the photocatalyst are attached to the chamber B. There is no ventilation door in both rooms. Six cigarette users (male) entered each of these rooms and smoked for one hour so that two people always smoked. After the smoking experiment, all the subjects left the room,
Immediately after and 1 hour later, 5 non-cigarette users (female)
Room B and Room B were respectively entered, and the odor and the degree of physiological reaction due to cigarette smoke at that time were evaluated, and the results are shown in Table 1.

The odor was evaluated in the following 6 stages. Rank 0: "no odor"; no sense Rank 1: “Clear”; can be easily sniffed by a normal person, but is not uncomfortable. Rank 2: "Normal"; Not unpleasant but not uncomfortable. The strength of tolerance in the room. Rank 3: "Strong"; unpleasant. The air is disliked. Rank 4: "Furious"; Furious and uncomfortable. Rank 5: "Unbearable"; Vomiting occurs.

[0017]

[Table 1]

A equipped with a curtain carrying a photocatalyst
In the room, the average value for the odor judgment of the five panelers was 1.6, which was a small value, and 0.8 after 1 hour, which was a small value, as compared with the room B equipped with a normal curtain. Thus, it was confirmed that the bad odor such as cigarette odor was decomposed in the room where the curtain carrying the photocatalyst was installed.

Example 2 A polyester curtain was coated with water-soluble titanium oxide sol to carry a photocatalyst. The deodorizing / deodorizing effect was examined in the same manner as in Example 1 below by using the curtain supporting the photocatalyst and the ordinary curtain not supporting the photocatalyst. As a result, the average value of the odor judgment of room B with a normal curtain that does not perform any processing is
Immediately after was 3.4 and 1 hour later was 2.8, while
The average value of the odor determination in the room A equipped with the curtain supporting the photocatalyst was 1.8, which was small immediately after, and 1.0 after 1 hour, which was a small value. Thus, it was confirmed that the bad odor such as cigarette odor was decomposed and removed in the room where the curtain supporting the photocatalyst was attached.

[0020]

According to the present invention, since the photocatalyst is carried on the curtain, it is possible to easily decompose a bad odor such as cigarette odor in a room without providing a special deodorizing device. Further, since the photocatalyst used in the present invention causes a photocatalytic reaction by low energy light of 4 eV or less such as a fluorescent lamp or an incandescent lamp obtained in a normal room and sunlight passing through a window glass, nicotine, tar, and tar It is possible to decompose and remove various odors such as tobacco odor, pet odor, toilet odor, etc. In addition, the photocatalyst carrying a noble metal can further enhance the antibacterial effect against MRSA, Escherichia coli, Pseudomonas aeruginosa and the like in addition to the photocatalytic reaction. Further, even when it is dark, it has the above-mentioned antibacterial effect.

Claims (5)

[Claims] 1. A curtain having a surface on which a photocatalyst is supported. 2. The curtain according to claim 1, wherein the photocatalyst is TiO ₂ . 3. The curtain according to claim ₂ , wherein the curtain body is composed of an inorganic fiber containing SiO ₂ , and an interface between the photocatalyst and the inorganic fiber is bonded by a Ti—O—Si bond. . 4. The curtain according to claim 1, wherein the photocatalyst causes a photocatalytic reaction with energy light of 4 eV or less. 5. The curtain according to claim 1, wherein the photocatalyst is a photocatalyst carrying a noble metal.