JPH05155726A - Material for preventing proliferation of saprophytic bacteria - Google Patents

Abstract

PURPOSE:To provide a material for easily and safely preventing the proliferation of saprophytic bacteria with reduced energy consumption at a low cost and effective for preventing the generation of slime in a swimming pool and a sink and the proliferation of saprophytic bacteria in water. CONSTITUTION:A substrate optionally having an electrically conductive coating film is coated with a titanium oxide film. The titanium oxide film is optionally further coated with a platinum film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the prevention of the propagation of bacteria in water.

[0002]

2. Description of the Related Art In the summer, when you go to the pool to play in the water, the temperature is high and it is easy for bacteria to propagate. And can be very dangerous. In addition, slimming is likely to occur even in a place where water is often used such as a sink or a wash basin. On the other hand, when storing drinking water in bottles and the like, if left at room temperature for a long period of time, various bacteria will proliferate and spoil and become unusable.

[0003] Conventionally, in order to prevent the generation of such slime and the propagation of various bacteria in water, the water in the pool is replaced, the pool and the sink are cleaned to remove the slime, and disinfection is performed by using chlorine or a disinfectant. Things are being done. Moreover, when storing drinking water etc. for a long period of time, it is performed by adding a preservative or sterilizing by boiling or the like and then sealing (Heibonsha, Encyclopedia, Volume 11, p.
473, vol. 9, p. 514). However, all of these methods have problems in terms of toxicity, safety, and economic efficiency.
Chlorine reacts with organic substances contained in water to generate carcinogenic trihalomethanes and organochlorine compounds, and decolorizes swimwear, and disinfectants and preservatives are also problematic in terms of safety. There is.

[0004]

SUMMARY OF THE INVENTION In view of the above points, the present invention has an object to provide an economical germ cell growth preventive body which is energy-saving, can easily and safely prevent the germ cell growth.

[0005]

According to the present invention, this object is achieved by coating a substrate or a substrate coated with a conductive film with a titanium oxide film, or by further coating a platinum film thereon. To be done. When the antimicrobial propagation material according to the present invention is stretched inside the pool or placed in a container containing drinking water or the like, electrons or holes are generated in the titanium oxide film in response to light such as sunlight or electric light. As a result, oxidation and reduction are carried out, and the effect thereof can prevent the propagation of various bacteria.

The substrate used in the present invention may be made of any material such as concrete, glass, plastic, ceramics and metal as long as it has the required strength. Further, the substrate used in the present invention may be transparent or opaque, but the transparent substrate is convenient because light can pass through the substrate from the outside and enter.

The substrate coated with a conductive film used in the present invention may be a substrate coated with copper or aluminum. When the substrate is placed in a container containing drinking water or the like to prevent the growth of germs. Is preferably a transparent conductive film such as tin oxide, ITO (indium tin oxide), or zinc oxide.

The substrate used in the present invention may have any shape such as a prismatic shape, a cylindrical shape, a spherical shape, a conical shape, a gourd shape or a rugby ball shape. Further, the substrate may be in a closed shape, may or may not have a lid, and may have a circular tubular shape or a rectangular tubular shape.

The anti-proliferative body according to the present invention is prepared by preparing a titania sol from a titanium alkoxide obtained by the reaction of titanium tetrachloride and an alcohol, and dip coating, spin coating, coating, spray pyrolysis or the like on a substrate. It may be manufactured by baking after coating on, or may be manufactured by heating a titanium substrate with a gas flame or the like and oxidizing it to form titanium oxide. Alternatively, a suspension of ultra-fine particles of titanium oxide may be coated on the substrate by a dip coating method, a spin coating method, a coating method, a spray method, or the like, and then baked to manufacture. The firing temperature at that time is most preferably about 500 ° C.

Examples of the method for coating the conductive film on the substrate used in the present invention include electrolytic plating method, CVD method, PVD method and sputtering method. Examples of the method for coating the platinum film on the substrate coated with the titanium oxide film used in the present invention include photoelectric deposition method, CVD method, PVD method, and sputtering method.

The thus obtained substrate or a substrate provided with a conductive film is coated with a titanium oxide film to prevent bacterial growth, or a platinum film is further coated to prevent bacterial growth on the inside of the pool. Or, if you put it in a container containing drinking water, etc., it will receive electrons such as sunlight and electric light, and will generate electrons and holes in the titanium oxide film, which will carry out redox. Since it can prevent breeding, it can prevent slippery slippers from being attached to the bottom, walls, tiles, etc. of the pool, and drinking water can be stored at room temperature for a long time. The germ growth preventive body according to the present invention is not limited to the pool wall, but also a bathroom tile, a sludge,
It can be used in a wide range of applications such as bath tubs, bathtubs, fountain tiles, sinks, triangular corners of sinks, banquets for pools and bathrooms, washbasins, cutting boards, washbasins, and fish showcases.

[0012]

EXAMPLES Among the examples of the present invention, particularly representative ones are shown below.

Example 1 A metal washbasin was coated with a titanium oxide film by the sol-gel method, and the fishbowl was filled with water and allowed to stand under a fluorescent lamp for one month, but the surface did not become slimy. The water remained clear and no germs or algae grew. When a metal washbasin not coated with a titanium oxide film was used, algae grew and slimy occurred within one week, and the water became cloudy.

Example 2 A colorless and transparent glass ball coated with a transparent conductive film of ITO and coated with a titanium oxide film by a sol-gel method was placed in a 2 g / 1 aqueous solution of potassium chloroplatinate in ethanol, and the magnetic stirrer was used. With stirring, the light of a 100 W mercury lamp was irradiated for 4 hours, and the surface of the titanium oxide film was coated with platinum by the photoelectric deposition method. The obtained bacteria-preventing body was put in a transparent glass bottle containing natural fresh water, and left in a bright place for one month. As a result, the water became white and turbid and the bacteria propagated when the bacterial growth preventer was not added, but the water remained transparent and the bacteria were hardly detected when the bacteria preventive body was added. ..

Example 3 A platinum ceramic tile was coated with a titanium oxide film by the sol-gel method, and then the surface was coated with platinum, which was then attached to the wall of the pond and water of the pond was filled. I left it for two months as it was, but the tile did not get slimy.

[0016]

INDUSTRIAL APPLICABILITY As described above, the present invention provides an energy-saving, easy, safe and economical antibacterial bacterial growth preventive agent for preventing slimming in pools and sinks and propagation of various bacteria in water. It is intended to be provided. A substrate or a substrate coated with a conductive film is coated with a titanium oxide film to prevent bacterial growth, or a platinum film is further coated to prevent bacterial growth on the inside of a pool, etc., or drinking water. By putting it in a container that contains, etc., the germ growth prevention body receives light such as sunlight and electric lights,
Electrons and holes are generated in the titanium oxide film to carry out redox,
Because of the effect of preventing the growth of germs, it is possible to prevent slippery slippery slips on the bottom, walls, and tiles of the pool, and to store drinking water at room temperature for a long time. When placed in a transparent fishbowl, vase, etc., water is activated by the redox action of the titanium oxide film, allowing fish and flowers to live longer. The titanium oxide used in the present invention is also used in paints, cosmetics, toothpaste, etc., and has the advantages of durability, nontoxicity, and safety. Further, the antimicrobial propagation material according to the present invention is not limited to the wall of the pool, but also the tiles of the bathroom, the slats, the sink, the triangular corners of the sink, the bath tub, the bathtub, the tiles of the fountain, the railing of the pool or the bathroom, and the washbasin. It can be used in a wide range of applications such as vessels, cutting boards, washbasins, fish showcases, and humidifier outlet nozzles. Moreover, since it produces beautiful colors such as red, blue, purple and green due to light interference, it is also suitable for decoration.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Amada 1-70 Heiwagaoka, Meito-ku, Nagoya City Inoko, No. 4, No. 301, Ishi Housing 4 (72) Inventor Tatsuro Horiuchi 2-109, Yatsushiro-cho, Kita-ku, Nagoya Dormitory 101 (72) Inventor Takahiro Suzuki 3-11 Kitahara-cho, Mizuho-ku, Nagoya City Sanoh Mansion Mizuho Kitahara 102 (72) Inventor Toshihiko Ozaki 91 (72) Inventor Kazumi Kaichi Kato Aichi Kato Machine Co., Ltd. 400, Iwaki, Komaki City, Kumamoto Prefecture (72) Inventor Hiroaki Yokoi 56 Nobata, Yaruge Town, Iwakura City, Aichi Prefecture Aiwa Co., Ltd.

Claims (4)

[Claims] 1. A bacterial growth preventive body comprising a substrate coated with a titanium oxide film. 2. A bacterial growth preventive body comprising a substrate having a conductive film coated with a titanium oxide film. 3. A bacterial growth preventive body comprising a substrate coated with a titanium oxide film, and a platinum film further coated thereon. 4. A bacterial growth preventive body comprising a substrate having a conductive film coated with a titanium oxide film, and a platinum film further coated thereon.