MXPA98003394A - Braun pipe that has an anti-bacterial cover film and its fabricac method - Google Patents
Braun pipe that has an anti-bacterial cover film and its fabricac methodInfo
- Publication number
- MXPA98003394A MXPA98003394A MXPA/A/1998/003394A MX9803394A MXPA98003394A MX PA98003394 A MXPA98003394 A MX PA98003394A MX 9803394 A MX9803394 A MX 9803394A MX PA98003394 A MXPA98003394 A MX PA98003394A
- Authority
- MX
- Mexico
- Prior art keywords
- titanium dioxide
- braun tube
- coating film
- range
- silicate
- Prior art date
Links
- 230000000844 anti-bacterial Effects 0.000 title claims abstract description 37
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000000576 coating method Methods 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 40
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 25
- 239000006185 dispersion Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 7
- -1 silicate compound Chemical class 0.000 claims description 16
- 239000000203 mixture Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 230000032683 aging Effects 0.000 claims description 6
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 3
- LFQCEHFDDXELDD-UHFFFAOYSA-N Tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052914 metal silicate Inorganic materials 0.000 claims description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N silicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 241000894006 Bacteria Species 0.000 abstract description 3
- 230000001699 photocatalysis Effects 0.000 abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N oxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 244000005700 microbiome Species 0.000 description 7
- 241000588724 Escherichia coli Species 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- OGIDPMRJRNCKJF-UHFFFAOYSA-N TiO Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 230000036740 Metabolism Effects 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000003115 biocidal Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000011247 coating layer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000011081 inoculation Methods 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 230000035786 metabolism Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N oxygen atom Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 230000035943 smell Effects 0.000 description 1
- 238000009718 spray deposition Methods 0.000 description 1
- 230000003068 static Effects 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Abstract
The present invention relates to a Braun tube having an antibacterial coating film, which is manufactured by means of the following steps: dispersing titanium dioxide (TiO2) in alcohol to prepare a dispersion, then coating the dispersion on a tube of Braun, to subsequently carry out a heat treatment. By means of a photocatalytic reaction of the titanium dioxide contained in the antibacterial coating film, oxygen (O2) and water (H2O) in the air are decomposed to transform them into superoxide (o-2) and the hydroxy radical ( OH), which destroy the bacteria and mold around the Braun tube and eliminate the bad ol
Description
BRAUN PIPE THAT HAS AN ANTIBACTERIAL COATING FILM AND ITS MANUFACTURING METHOD. * FIELD OF THE INVENTION.
The present invention relates to a Braun tube and its manufacturing method, and more particularly, to a Braun tube having an antibacterial coating film 10 and to a method of manufacturing
# 1 to my sm.
BACKGROUND OF THE INVENTION
In one aspect of an operating mechanism, a Braun tube generates a lot of heat and has an electrifying property. In this way the dust that is in the air is easily adhered to the Braun tube and various
types of microorganisms can inhabit there. To solve these problems an antistatic treatment has been proposed. This anti-static treatment prevents the generation of static electricity,
thus reducing the adhesion of REF: 27388 powder. However, antistatic treatment can neither block the heat generated from the Braun tube nor prevent the generation of microorganisms. In this way, problems related to hygiene, caused by the multiplication of microorganisms, continue. However, no research has been conducted regarding a technology that provides the function of preventing the spread of microorganisms. Most of the research has focused on an antibacterial composition as well as the application of the antibacterial composition to a fiber or a sanitary container. Likewise, most of said compositions are formed of substances or substances.
BRIEF DESCRIPTION OF THE INVENTION
To solve the aforementioned problems, the purpose of the present invention is to provide a Braun tube that has an antibacterial function.
* Another purpose of the present invention is to provide a method for the manufacture of the aforementioned Braun tube. To achieve the first purpose, a Braun tube consisting of an antibacterial coating film containing titanium dioxide (Ti02) is provided. Preferably, the thickness of the
# Antibacterial coating film should be within a range of 500 to 5,000 A Preferably, the content of titanium dioxide with respect to the antibacterial coating film should be between 5 and 10% based on weight. Preferably, the antibacterial coating film further comprises at least one silicate compound. Here, the proportion of the mixture of titanium dioxide 20 and the silicate compound can be within a range of 1: 1 to 1: 2, and the sum of the titanium dioxide and the silicate compound can be within a range between 10 and 20% based on the total weight of the antibacterial coating film 25. Also, the silicate compound may be methyl silicate, ethyl silicate or metal silicate. Also, preferably, titanium dioxide 5 has the structure of anatase and the average particle diameter is within a range of 1 to 50 nm. To achieve the second purpose, a manufacturing method has been provided
of a Braun tube having an antibacterial coating film, consisting of the following steps: (a) dispersing titanium dioxide (Ti02) in alcohol to prepare a dispersion; and (b) coat the dispersion on
the Braun tube and carry out a heat treatment. Preferably, titanium dioxide has the structure of anatase and the average particle diameter is within
a range that is between 1 and 50 nm. Preferably, the concentration of the titanium dioxide in the dispersion is within a range that is between 5 and 10% based on the weight. 25 Preferably, the ^ is performed. coating until reaching a thickness that is within a range that is between 500 and 5,000 Á. Also, preferably, the heat treatment is carried out after the coating at a temperature between 130 and 150 ° C for a time of 30 to 60 minutes. Preferably, between steps (a) and (b), the method further comprises the
next steps: (al) mix the dispersion with a solution of silicate compound; and (a2) adjusting the pH of the mixture, re-dispersing the mixture using ultrasonic waves and subjecting the dispersion to aging.
Here, the aging can be carried out at a temperature between 30 and 60 ° C for a time of 30 to 60 minutes.
DESCRIPTION OF THE PREFERRED MODALITY 20 In the following, a detailed description will be made of the method for the manufacture of an antibacterial Braun tube and the principle of operation thereof. According to the preferred embodiment, an antibacterial Braun tube suitable for the present invention is manufactured by means of the following method. First, the titanium dioxide is dispersed in alcohol with a final concentration of 5 to 10% based on weight, to prepare a dispersion. Here, the dispersion of a silicate compound in alcohol or other solvent is mixed with the dispersion
cited above, to then adjust the pH so that it is acid, preferably, a pH of 2 to 3, to subsequently disperse the mixture for 10 minutes or more using ultrasonic waves of 10 to 50 kHz. After, to
The resulting solution is subjected to a heat treatment to age it at a temperature of 30 to 60 ° C for a time of 30 to 60 minutes. By means of this aging, the
The silicate compound, and the obtained polymer acts as a binder between the glass Braun tube and the antibacterial coating film, in a subsequent process. To the solution obtained through the treatment
mentioned above is covered > in the Braun tube and heat treated, to form an antibacterial coating film, resulting in the Braun tube having an antibacterial coating film 5 according to the present invention. Preferably, a general coating method such as rotary coating, spray coating and deposition can be used,
carrying out the heat treatment at a temperature of 130 to 150 ° C for a time of 30 to 60 minutes. During the heat treatment, the solvent is completely vaporized from the coated composition in
the glass surface, which results in a hard and compact coating film containing silicon dioxide (Si02) and titanium dioxide (Ti0). Preferably, the dioxide
Titanium, the main component of the antibacterial coating film of the present invention, has the structure of anatase and an average particle diameter of 10 to 20 nm. Here, the particle size is
determines taking into account the properties of * coating and the solvent that is used and the agglomeration in the silicate. Also, preferably, the coating film has a thickness of between 500 and 5,000 A. If the thickness of the coating film is less than 500 Á, its antibacterial effect is negligible. At the same time, if the thickness of the coating film
* exceeds 5,000 A, which exceeds
In the normal thickness of a Braun tube, it is difficult to form a coating film that is uniform. If a silicate compound is additionally used, the coating properties
and the hardness of the coating film are conveniently maintained at a mixing ratio of 1: 1-1: 2 between the titanium dioxide and the added silicate compound based on weight. The principle of the antibacterial function of a Braun tube having an antibacterial coating film according to the present invention, manufactured by the aforementioned method is as
follows: * By means of a photocatalytic reaction of the titanium dioxide contained in the antibacterial coating film of the Braun tube, it is decomposed to oxygen (0) and water (H20) that are in the air to generate a superoxide (O2-) and a hydroxy (OH) radical. These decomposed products have the function of
* exterminate bacteria and mold that are
around the Braun tube, as well as eliminate the bad smell. The photocatalytic reaction can be carried out by means of sunlight, and of a lighting or fluorescent lamp. This reaction is also presented thanks to the
own Braun tube light. In this way, the antibacterial effect can be achieved in a Braun tube having an antibacterial coating layer. Speaking in detail, the 02 what is in the air is
transforms into O-2 by means of the electrons generated during which the Ti cation is formed from the decomposition of TiO ^ thanks to the light, and the hydroxy group is transformed into a hydroxy radical. Said
resulting substances adversely affect the metabolism and the electron transport system of microorganisms, thereby eliminating the spread of bacteria or mold. In the following, a detailed description of the present invention will be made by means of an example. However, the present invention is not limited to the following example. 10 g of Ti02, having the structure of anatase and an average particle diameter of about 30 nm, were dissolved in 600 g of ethanol to obtain a dispersion. Then they added
300 g of methyl silicate dispersion (10%) to subsequently mix uniformly, adjusting the pH of the solution to approximately 4.5. After the mixture was dispersed for 15 minutes using waves
ultrasonics of around 30 kHz, carrying out the aging process at 35 ° C for 40 minutes, which results in an antibacterial coating composition. After spraying the antibacterial coating compound 5 on the Braun tube, a heat treatment was performed at 150 ° C for about 1 hour to form a coating film having an approximate thickness of 1,000 A, 5 thereby completing the tube of Braun according to the present invention. E. coli (10-6 / cm2) was inoculated onto the surface of the antibacterial coating films of
«Two Braun tubes illuminated with a lamp
fluorescent. The surfaces of the antibiotic coating films were also continuously exposed to sunlight during daylight hours. Here, one of Braun's tubes was activated, while at
another one was deactivated. After 24 hours, the number of E. coli that were still alive was counted. As a result of this, the number of E. coli from the Braun tube that was deactivated
decreased by 90% compared to the initial inoculation. The results were the same in the Braun tube that was activated. That is, in the Braun tube, according to the present invention, the number of E. coli
decreased greatly.
* However, the number of E. coli could increase logarithmically for 24 hours through various cycles of duplication if the necessary circumstances for the growth of the microorganisms do not change unfavorably. In this way, it can be seen that the Braun tube of the present invention eliminates the growth of
# microorganisms, which is achieved based on the
operating principle described above. As already stated, the Braun tube of the present invention shows a high level of antibacterial performance, so that
can be used effectively from the perspective of a hygienic environment. Thus, the present invention can be applied to various fields that require antibacterial characteristics, particularly, in the
screen of a visualization device.
It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:
Claims (15)
- CLAIMS 1. A Braun tube characterized in that it comprises a coating film 5 antibacterial containing titanium dioxide (Ti02).
- 2. The Braun tube of # conformance with rei indication 1, 10 characterized in that the content of titanium dioxide with respect to the antibacterial coating film is between 5 and 10% based on weight.
- 3. The Braun tube according to claim 1, characterized in that the titanium dioxide has the structure of the anatase and the average particle diameter is within a range of 1 to 50 nm.
- 4. The Braun tube according to claim 1, characterized in that the thickness of the antibacterial coating film is within a range of 25 between 500 and 5,000 Á. «The Braun tube according to claim 1, characterized in that the antibacterial coating film also comprises at least one silicate compound selected from the group consisting of methyl silicate, ethyl silicate and metal silicate. 6. The Braun tube according to the indication 5, characterized in that the mixing ratio of the titanium dioxide and the silicate compound is within a range of 15: 1 and 1: 2, and the sum of the titanium dioxide and the silicate compound is within a range of between 10 and 20% based on the total weight of the antibacterial coating film. 7. A method for manufacturing a Braun tube having an antibacterial coating film, characterized in that it comprises the following steps: (a) disperse titanium dioxide * Ti02) in alcohol to prepare a dispersion; And (b) coat the dispersion on the Braun tube and perform a heat treatment. The method according to claim 7, characterized in that the titanium dioxide has the structure of the 10 anatase and the average particle diameter is within a range of between 1 and 50 nm. 9. The method according to claim 7, characterized in that the concentration of titanium dioxide in the dispersion is within a range of 5 to 10% based on weight. 10. The method according to claim 7, characterized in that the coating is applied until it reaches a thickness within a range of 500 to 5,000 A. 11. The method according to claim 7, characterized in that the Heat treatment after coating is carried out at a temperature between 130 and 150 ° C, for a time of 30 to 60 minutes. 12. The method according to claim 7, characterized in that between steps (a) and (b), the method further comprises the following steps: (a) mixing the dispersion with a solution of silicate compound; and (a2) adjusting the pH of the mixture, re-dispersing the mixture using ultrasonic waves and aging the dispersion. 13. The method according to claim 12, characterized in that the silicate compound is at least one selected from the group consisting of silicate 20 methyl, ethyl silicate and metal silicate i co. 14. The method according to claim 13, characterized in that the The proportion of the mixture of the titanium dioxide and the silicate compound is within a range of 1: 1 to 1: 2, and the sum of the titanium dioxide and the silicate compound is within a range of 10 to 20% based on the total weight of the complete mixture. 15. The method according to claim 13, characterized in that the aging is carried out at a temperature of 30 to 60 ° C, for a time of 30 to 60 minutes.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KP97-17235 | 1997-05-06 | ||
| KR9717235 | 1997-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| MXPA98003394A true MXPA98003394A (en) | 2000-01-01 |
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