JP2007289850A - Indoor oiling decomposing device and indoor oiling decomposing method - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000011941 photocatalyst Substances 0.000 claims abstract description 49
- 239000004094 surface-active agent Substances 0.000 claims abstract description 29
- 230000003197 catalytic effect Effects 0.000 claims abstract description 12
- 230000003647 oxidation Effects 0.000 claims abstract description 12
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000010419 fine particle Substances 0.000 claims description 11
- 238000005507 spraying Methods 0.000 claims description 8
- 239000002245 particle Substances 0.000 claims description 6
- 238000000889 atomisation Methods 0.000 abstract description 5
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
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- 229910052760 oxygen Inorganic materials 0.000 description 10
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9
- 239000001301 oxygen Substances 0.000 description 9
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 9
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- -1 superoxide ions Chemical class 0.000 description 5
- 229910001335 Galvanized steel Inorganic materials 0.000 description 4
- 238000010411 cooking Methods 0.000 description 4
- 239000008397 galvanized steel Substances 0.000 description 4
- 229910010413 TiO 2 Inorganic materials 0.000 description 3
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
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- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 125000004433 nitrogen atom Chemical group N* 0.000 description 2
- 239000002736 nonionic surfactant Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 description 2
- 229910005855 NiOx Inorganic materials 0.000 description 1
- 229910019897 RuOx Inorganic materials 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000012644 addition polymerization Methods 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
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- 239000003599 detergent Substances 0.000 description 1
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- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
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- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
Description
本願発明は、室内油汚れ分解装置と室内油汚れ分解方法に関するものである。 The present invention relates to an indoor oil stain decomposing apparatus and an indoor oil stain decomposing method.
住宅等の台所や調理場においては、調理行為に伴って調理に使用される油分が飛散し、壁面や床面等が汚染する。このような油汚れを分解・洗浄する方法のひとつとして、酸化チタンに代表される光触媒を汚染される表面に担持させ、光触媒の触媒酸化作用によって油分を分解する方法が知られている（たとえば、特許文献１参照）。また、別の方法としては、前記の光触媒に水を噴霧、吸着させることによって、油分解反応に寄与する水分、および溶存酸素を補給して、油汚れを分解する方法が知られている（たとえば、特許文献２参照）。
前者の方法によれば、光触媒による触媒酸化作用は、光触媒表面に光が照射されることにより発現するが、大量の油汚れが付着すると油分により光が遮断されて触媒酸化作用を発現するのに十分な光量が光触媒表面に到達しない場合があった。このような場合には、触媒酸化作用による分解速度が低下するため、油汚れを十分に分解・洗浄することができない場合があった。また、後者の方法によれば、油汚れの分解を効率よく進めることができるものであるが、大量の油汚れが発生するような環境下では、さらに効果的に油汚れを分解する方法が求められていた。 According to the former method, the catalytic oxidation action by the photocatalyst appears when light is irradiated on the surface of the photocatalyst. However, when a large amount of oil stains adhere, the light is blocked by the oil and the catalytic oxidation action is exhibited. In some cases, a sufficient amount of light did not reach the surface of the photocatalyst. In such a case, since the decomposition rate due to the catalytic oxidation action is reduced, the oil stains may not be sufficiently decomposed and washed. Further, according to the latter method, it is possible to efficiently decompose oil stains. However, in an environment where a large amount of oil stains are generated, a method for more effectively decomposing oil stains is required. It was done.
そこで、本願発明は、以上の通りの背景から、室内の床面や壁面等に付着した油汚れを効果的に分解することができる室内油汚れ分解装置と室内油汚れ分解方法を提供することを課題としている。 Therefore, the present invention provides an indoor oil stain decomposing apparatus and an indoor oil stain decomposing method capable of effectively decomposing oil stains adhering to an indoor floor surface or wall surface from the background as described above. It is an issue.
本願発明は、上記の課題を解決するものとして、第１には、室内油汚れ分解装置として、室内の壁面や床面等の表面に設けられ、この壁面や床面等に付着した油汚れを光照射による触媒酸化作用で分解する光触媒と、この光触媒に向けて界面活性剤を含む水分を噴霧する霧化手段とを備えていることを特徴とする。 In order to solve the above-mentioned problems, the present invention is, firstly, as an indoor oil dirt decomposing apparatus, provided on the surface of an indoor wall surface or floor surface, and the oil stain adhering to the wall surface or floor surface is removed. It is characterized by comprising a photocatalyst that decomposes by a catalytic oxidation action by light irradiation, and an atomizing means for spraying water containing a surfactant toward the photocatalyst.
第２には、上記の室内油汚れ分解装置において、界面活性剤を含む水分は、粒子径１μｍ以下の微粒子水であることを特徴とする。 Second, in the indoor oil stain decomposing apparatus, the water containing the surfactant is fine particle water having a particle diameter of 1 μm or less.
第３には、上記の室内油汚れ分解装置において、霧化手段は、界面活性剤を含む水分を霧化し帯電微粒子水を発生させる静電霧化装置であることを特徴とする。 Thirdly, in the indoor oil stain decomposing apparatus, the atomizing means is an electrostatic atomizing apparatus that atomizes water containing a surfactant and generates charged fine particle water.
第４には、室内油汚れ分解方法として、室内の壁面や床面等の表面に設けられた光触媒に向けて界面活性剤を含む水分を噴霧し、壁面や床面等に付着した油汚れを光触媒によって分解することを特徴とする。 Fourth, as a method for decomposing indoor oil stains, water containing a surfactant is sprayed toward the photocatalyst provided on the surface of the indoor wall surface, floor surface, etc., and the oil stain attached to the wall surface, floor surface, etc. is removed. It is decomposed by a photocatalyst.
上記第１の発明によれば、室内油汚れ分解装置として、室内の壁面や床面等の表面に設けられ、この壁面や床面等に付着した油汚れを光照射による触媒酸化作用で分解する光触媒と、この光触媒に向けて界面活性剤を含む水分を噴霧する霧化手段とを備えていることにより、壁面や床面等に付着した油汚れに界面活性剤を浸透させて、油汚れを形成している油分を薄膜化させることができる。そして、この薄膜化によって、光触媒表面に到達する光量が十分に確保されるとともに光触媒表面と接する油分の面積が拡大されるため、油汚れを効果的に分解することができる。また、以上の光触媒は、光の照射下においてヒドロキシラジカルやスーパーオキサイドイオン等の活性酸素種を発生させて、この活性酸素種により強力な酸化作用を発現させて油汚れを分解しているが、本願発明では前記活性酸素種の発生源である水が光触媒表面に潤沢に供給されるため、光触媒の触媒酸化作用がより効率的に発揮される。したがって、室内の床面や壁面等に付着した油汚れを効果的に分解することができる。 According to the first aspect of the present invention, the indoor oil stain decomposing device is provided on a surface such as an indoor wall surface or floor surface, and the oil stain adhering to the wall surface or floor surface is decomposed by catalytic oxidation by light irradiation. By providing a photocatalyst and an atomizing means for spraying water containing a surfactant toward the photocatalyst, the surfactant is infiltrated into the oil stain adhering to the wall surface, floor surface, etc. The oil component being formed can be made thin. This thinning ensures a sufficient amount of light reaching the photocatalyst surface and enlarges the area of the oil component in contact with the photocatalyst surface, so that the oil stain can be effectively decomposed. In addition, the above photocatalyst generates active oxygen species such as hydroxy radicals and superoxide ions under light irradiation, and develops a strong oxidizing action with this active oxygen species to decompose oil stains. In the present invention, water, which is the source of the active oxygen species, is sufficiently supplied to the surface of the photocatalyst, so that the catalytic oxidation action of the photocatalyst is more efficiently exhibited. Therefore, oil stains adhering to the indoor floor or wall surface can be effectively decomposed.
上記第２の発明によれば、界面活性剤を含む水分は、粒子径１μｍ以下の微粒子水であることにより、上記の効果に加え、壁面や床面等に付着した油汚れに界面活性剤をさらに効果的に浸透させて、油汚れを形成している油分を薄膜化させることができる。また、以上の微粒子水が光触媒表面に付着した際には水滴を形成しないため、表面に水漏れを生じさせて不快感や絶縁不良等の不具合を発生させることがない。 According to the second aspect of the invention, the water containing the surfactant is fine particle water having a particle diameter of 1 μm or less, and in addition to the above effects, the surfactant is applied to oil stains adhering to the wall surface or floor surface. Further, the oil can be effectively penetrated and the oil component forming the oil stain can be thinned. Moreover, when the above fine particle water adheres to the surface of the photocatalyst, water droplets are not formed, so that water leakage does not occur on the surface, causing problems such as discomfort and poor insulation.
上記第３の発明によれば、霧化手段は、界面活性剤を含む水分を霧化し帯電微粒子水を発生させる静電霧化装置であることにより、上記の効果に加え、壁面や床面等に付着した油汚れに界面活性剤をより一層効果的に浸透させるとともに光触媒表面に水分を供給することができる。 According to the third aspect of the invention, the atomizing means is an electrostatic atomizing device that atomizes moisture containing a surfactant and generates charged fine particle water. It is possible to more effectively infiltrate the surfactant into the oil stain adhering to the surface and to supply moisture to the surface of the photocatalyst.
上記第４の発明によれば、室内油汚れ分解方法として、室内の壁面や床面等の表面に設けられた光触媒に向けて界面活性剤を含む水分を噴霧し、壁面や床面等に付着した油汚れを光触媒によって分解することにより、室内の床面や壁面等に付着した油汚れを簡便かつ効果的に分解することができる。 According to the fourth aspect of the invention, as a method for decomposing indoor oil stains, water containing a surfactant is sprayed toward the photocatalyst provided on the surface of the indoor wall surface, floor surface, etc., and adheres to the wall surface, floor surface, etc. By decomposing the oil stains with the photocatalyst, the oil stains adhering to the indoor floor or wall surface can be easily and effectively decomposed.
本願発明は上記のとおりの特徴をもつものであるが、以下にその実施の形態について詳しく説明する。 The present invention has the features as described above, and the embodiments thereof will be described in detail below.
本願発明の室内油汚れ分解装置は、室内の壁面や床面等の表面に設けられ、この壁面や床面等に付着した油汚れを光照射による触媒酸化作用で分解する光触媒と、この光触媒に向けて界面活性剤を含む水分を噴霧する霧化手段とを備えている。 The indoor oil stain decomposing apparatus of the present invention is provided on a surface such as a wall surface or floor surface in a room, and a photocatalyst that decomposes oil stains attached to the wall surface or floor surface by catalytic oxidation action by light irradiation, and the photocatalyst. And an atomizing means for spraying water containing a surfactant.
本願発明における光触媒としては、ＴｉＯ２、ＺｎＯ、ＷＯ３、ＦｅＯ３、ＺｎＳ、Ｐｔ／ＴｉＯ２などが例示されるが、特に、入手のしやすさ、コスト等を考慮するとＴｉＯ２（酸化チタン）が好ましく、室内で使用することを考慮すると、酸素欠陥型酸化チタン、色素増感型酸化チタン、金属担持型酸化チタン等の可視光型光触媒であることがより好ましい。たとえば、酸化チタンの酸素サイトの一部を窒素原子で置換、あるいは酸化チタン結晶の格子間、結晶粒界に窒素原子またはＮＯｘを配してなる、Ｔｉ、Ｏ、Ｎの元素で構成されている窒素ドープ型酸化チタンや、これらに助触媒として白金、パラジウム、ロジウム、ルテニウムなどの白金族金属や、ＮｉＯｘ、ＲｕＯｘ、ＲｈＯｘなどを担持させたものなどが挙げられる。これらは粉体であってもゾル状のものであってもよい。ゾル状のものとする場合、水分散性であっても、アルコールなどの非水系有機溶媒分散性であってもよい。そして、たとえば、以上の光触媒を含んだ塗料を床面や壁面等に塗布することにより、床面や壁面等の表面に光触媒を設けている。 Examples of the photocatalyst in the present invention include TiO 2 , ZnO, WO 3 , FeO 3 , ZnS, Pt / TiO 2, etc. In particular, considering availability and cost, TiO 2 (titanium oxide) In view of use indoors, visible light photocatalysts such as oxygen-deficient titanium oxide, dye-sensitized titanium oxide, and metal-supported titanium oxide are more preferable. For example, a part of the oxygen site of titanium oxide is replaced with nitrogen atoms, or it is composed of Ti, O, and N elements formed by arranging nitrogen atoms or NOx between lattices of titanium oxide crystals and crystal grain boundaries. Nitrogen doped titanium oxide, platinum group metals such as platinum, palladium, rhodium, and ruthenium, and NiOx, RuOx, RhOx, etc. supported thereon as promoters. These may be powder or sol. In the case of a sol form, it may be water dispersible or non-aqueous organic solvent dispersible such as alcohol. And the photocatalyst is provided in the surfaces, such as a floor surface and a wall surface, for example by apply | coating the coating material containing the above photocatalysts to a floor surface or a wall surface.
霧化手段で噴霧された界面活性剤を含む水分は、粒子径５μｍ以下の微粒子水であることが考慮される。これによって、床面や壁面等の表面に設けられた光触媒まで効果的に到達させることができる。特に粒子径を１μｍ以下の微粒子水とした場合には、光触媒表面に付着した際に水滴を形成することがないため、表面に水漏れを生じさせて不快感や絶縁不良等の不具合を発生させることがないため好ましい。 It is considered that the water containing the surfactant sprayed by the atomizing means is fine particle water having a particle diameter of 5 μm or less. Thereby, the photocatalyst provided on the surface such as the floor surface or the wall surface can be effectively reached. In particular, when fine particle water having a particle diameter of 1 μm or less is formed, water droplets are not formed when adhering to the surface of the photocatalyst, causing water leakage on the surface and causing problems such as discomfort and poor insulation. It is preferable because there is nothing.
本願発明では、界面活性剤を含む水分が光触媒に到達することで、付着した油汚れに界面活性剤が浸透し、油汚れを形成している油分を薄膜化させている。この薄膜化によって、光触媒表面に到達する光量が十分に確保されるとともに光触媒表面と接する油分の面積が拡大されるため、油汚れを効果的に分解することができる。また、以上の光触媒は、光の照射下においてヒドロキシラジカルやスーパーオキサイドイオン等の活性酸素種を発生させて、この活性酸素種により強力な酸化作用を発現させて油汚れを分解しているが、前記活性酸素種の発生源である水が光触媒表面に潤沢に供給されるため、光触媒の触媒酸化作用がより効率的に作用する。したがって、室内の床面や壁面等に付着した油汚れを効果的に分解することができる。 In this invention, when the water | moisture content containing surfactant reaches | attains a photocatalyst, surfactant penetrate | infiltrate to the oil stain which adhered, and the oil component which forms oil stain is made into a thin film. This thinning ensures a sufficient amount of light reaching the surface of the photocatalyst and enlarges the area of the oil component in contact with the surface of the photocatalyst, so that oil stains can be effectively decomposed. In addition, the above photocatalyst generates active oxygen species such as hydroxy radicals and superoxide ions under light irradiation, and develops a strong oxidizing action with this active oxygen species to decompose oil stains. Since water, which is a generation source of the active oxygen species, is sufficiently supplied to the surface of the photocatalyst, the catalytic oxidation action of the photocatalyst acts more efficiently. Therefore, oil stains adhering to the indoor floor or wall surface can be effectively decomposed.
以上の界面活性剤としては、一般的には陰イオン系、非イオン系等の界面活性剤が例示されるが、付着した油汚れに浸透し、油汚れを形成している油分を薄膜化させるものであれば特に制限されるものではない。たとえば、石けんをはじめ各種の洗浄剤に用いられるようなものであってよく、具体的には、高級アルコールやアルキルフェノール等、水酸基をもつ原料に主として酸化エチレン（エチレンオキシド）を付加重合したもの、あるいは後述の実施例で用いたポリオキシエチレンラウリルエーテル等を例示することができる。また、水に対する含有率としては、特に制限するものではなく、たとえば、水に対して界面活性剤の重量固形分が０．５〜５％程度含まれるようにすることが考慮される。 Examples of the above-mentioned surfactants are generally anionic and nonionic surfactants, but they penetrate into the attached oil stain and reduce the thickness of the oil component forming the oil stain. If it is a thing, it will not restrict | limit in particular. For example, it may be used for various detergents including soap, and specifically, a material obtained by addition polymerization of ethylene oxide (ethylene oxide) mainly on a raw material having a hydroxyl group, such as higher alcohol and alkylphenol, or described later. Examples thereof include polyoxyethylene lauryl ether used in the examples. Moreover, it does not restrict | limit especially as content rate with respect to water, For example, it is considered that the weight solid content of surfactant is included about 0.5 to 5% with respect to water.
界面活性剤を含む水分を噴霧する霧化手段としては、界面活性剤を含む水分をミスト状にして床面や壁面等の表面に設けられた光触媒に向けて放出可能なものであれば、特に制限されるものではなく、一般に市販されているものを用いることができる。たとえば、界面活性剤を含む水分に超音波の振動エネルギーを与え、キャビテーションを発生させることにより、液体の表面張力を減少させて規則的分裂を行うような超音波霧化方式であってもよいし、あるいは静電霧化方式であってもよい。この静電霧化方式とする静電霧化装置は、たとえば、特開２００３−７９７１４号公報に記載されているように、界面活性剤を含む水分の液溜め部とキャピラリ電極と高電圧発生部とで構成されており、キャピラリ電極に高電圧を印加することにより静電霧化するようにしている。この静電霧化装置によって霧化することにより、室内の床面や壁面に付着し易い帯電微粒子水とすることができる。したがって、壁面や床面等に付着した油汚れに界面活性剤をより一層効果的に浸透させるとともに光触媒表面に水分を供給することができる。 As the atomizing means for spraying the water containing the surfactant, the water containing the surfactant is mist and can be released toward the photocatalyst provided on the surface such as the floor surface or the wall surface. It does not restrict | limit and what is generally marketed can be used. For example, it may be an ultrasonic atomization system in which regular vibrations are generated by reducing the surface tension of a liquid by applying ultrasonic vibration energy to moisture containing a surfactant to generate cavitation. Alternatively, an electrostatic atomization method may be used. An electrostatic atomizing apparatus that employs this electrostatic atomization system is, for example, as described in Japanese Patent Application Laid-Open No. 2003-79714, a water reservoir containing a surfactant, a capillary electrode, and a high voltage generator. The electrostatic atomization is performed by applying a high voltage to the capillary electrode. By atomizing with this electrostatic atomizer, it can be set as the charged fine particle water which adheres easily to the indoor floor surface or wall surface. Therefore, it is possible to more effectively infiltrate the surfactant into the oil stains adhering to the wall surface or floor surface and to supply moisture to the photocatalyst surface.
以上の霧化手段の設置場所としては、霧化手段によって霧化された界面活性剤を含む水分が床面や壁面等に到達するような場所であれば制限されるものではない。たとえば、床面や壁面に直接設置してもよいし、室内に給気を行うダクト内に設置してもよい。 The installation location of the above atomizing means is not limited as long as the water containing the surfactant atomized by the atomizing means reaches the floor surface or the wall surface. For example, you may install directly in a floor surface or a wall surface, and you may install in the duct which supplies air indoors.
以下に本願発明の実施例を示すが、本願発明はこれらに制限されるものではない。 Examples of the present invention are shown below, but the present invention is not limited thereto.
＜実施例１＞
テトラエトキシシラン（商品名：エチルシリケート２８ コルコート株式会社製）３４部にメタノール６０部を加え、さらに水３部および０．０１Ｎの塩酸３部を混合し、ディスパーを用いてよく混合し、６０℃恒温槽中にて２時間加熱することにより、無機系塗膜のレジンとなる有機ケイ素アルコキシドの加水分解物および部分加水分解物を得た。ここに光触媒であるアナターゼ型酸化チタン（商品名：ＳＴ−０１ 石原産業株式会社製）２０部を添加した後に全固形分が５％になるようにメタノールで希釈することによって、光触媒含有無機系塗料を得た。この光触媒含有無機系塗料を脱脂洗浄した亜鉛鋼板にスプレーで２０ｇ／ｍ２塗布し、１５０℃１分の条件で乾燥させることにより、表面に光触媒を含有する塗膜を有する亜鉛鋼板（試験用サンプル１）を得た。この亜鉛鋼板を調理場の壁面にシリコンコーキング剤を用いて接着して設置した。
<Example 1>
60 parts of methanol is added to 34 parts of tetraethoxysilane (trade name: ethyl silicate 28 manufactured by Colcoat Co., Ltd.), 3 parts of water and 3 parts of 0.01N hydrochloric acid are further mixed, and mixed well using a disper, 60 ° C. By heating in a thermostatic bath for 2 hours, a hydrolyzate and partial hydrolyzate of organosilicon alkoxide, which becomes a resin for an inorganic coating film, were obtained. After adding 20 parts of anatase-type titanium oxide (trade name: ST-01, manufactured by Ishihara Sangyo Co., Ltd.) as a photocatalyst, the mixture is diluted with methanol so that the total solid content becomes 5%. Got. This photocatalyst-containing inorganic paint is degreased and washed on a galvanized steel plate by spraying at 20 g / m 2 and dried under conditions of 150 ° C. for 1 minute, whereby a galvanized steel plate having a coating film containing a photocatalyst on its surface (test sample) 1) was obtained. This galvanized steel plate was attached to the wall surface of the kitchen using a silicon caulking agent.
また、非イオン系界面活性剤であるポリオキシエチレンラウリルエーテル（商品名：エマルゲン１０８ 花王株式会社製）を重量固形分で１％含む水を粒径１０〜１００ｎｍの微粒子水として０．５ｇ／ｈ発生させる静電霧化装置を調理場に設置した。 Further, water containing 1% by weight solid content of polyoxyethylene lauryl ether (trade name: Emulgen 108 manufactured by Kao Corporation), which is a nonionic surfactant, is 0.5 g / h as fine particle water having a particle size of 10 to 100 nm The electrostatic atomizer to be generated was installed in the kitchen.
なお、参考例として、光触媒含有無機系塗料を塗布しない亜鉛鋼板（試験用サンプル２）を作製し、上記の試験用サンプル１と同様に調理場の壁面に設置した。 As a reference example, a galvanized steel sheet (test sample 2) to which a photocatalyst-containing inorganic coating was not applied was prepared and installed on the wall surface of the cooking place in the same manner as the test sample 1 described above.
この状態で１ヶ月間調理場を一般的な使い方で使用し、その使用前後で試験用サンプル１と試験用サンプル２の色差変化を分光測色計（ＣＭ−２６００ｄ：コニカミノルタ社製）により測定した。
＜比較例１＞
実施例１において静電霧化装置を調理場に設置しなかった以外は、実施例１と同様である。試験用サンプル１と試験用サンプル２を調理場の壁面に設置し、この状態で１ヶ月間調理場を一般的な使い方で使用し、その使用前後で試験用サンプル１と試験用サンプル２の色差変化を分光測色計（ＣＭ−２６００ｄ：コニカミノルタ社製）により測定した。
In this state, the kitchen is used in a general manner for one month, and the color difference between the test sample 1 and the test sample 2 is measured with a spectrocolorimeter (CM-2600d: manufactured by Konica Minolta) before and after the use. did.
<Comparative Example 1>
Example 1 is the same as Example 1 except that the electrostatic atomizer was not installed in the cooking area. Test sample 1 and test sample 2 are installed on the wall of the kitchen, and in this state, the kitchen is used in general usage for a month, and the color difference between test sample 1 and test sample 2 before and after use The change was measured with a spectrocolorimeter (CM-2600d: manufactured by Konica Minolta).
以上の結果より、実施例１では、試験用サンプル１の色差は△Ｅ＝０．６であったのに対し、試験用サンプル２の色差は△Ｅ＝２．４であった。この値が大きいほど使用前の試験用サンプルに対して着色していることを示しており、試験用サンプル１は試験用サンプル２に比べてあまり着色していないことが確認された。この着色は油汚れによるものであるため、試験用サンプル１の方が試験用サンプル２と比べて効果的に油汚れが分解されていることが確認された。 From the above results, in Example 1, the color difference of the test sample 1 was ΔE = 0.6, whereas the color difference of the test sample 2 was ΔE = 2.4. The larger the value, the more colored the test sample before use, and it was confirmed that the test sample 1 was not colored as much as the test sample 2. Since this coloring is caused by oil stains, it was confirmed that the test sample 1 was more effectively decomposed than the test sample 2.
なお、比較例１では、試験用サンプル１の色差は△Ｅ＝１．９で、試験用サンプル２の色差は△Ｅ＝２．７であった。試験用サンプル１の方が試験用サンプル２に比べてその値が小さいものの、実施例１の試験用サンプル１と比べるとその値が大きく、油汚れが分解されていないことがわかる。 In Comparative Example 1, the color difference of the test sample 1 was ΔE = 1.9, and the color difference of the test sample 2 was ΔE = 2.7. Although the value of the test sample 1 is smaller than that of the test sample 2, the value is larger than that of the test sample 1 of Example 1, and it can be seen that the oil stain is not decomposed.
以上、室内の壁面や床面等の表面に設けられ、この壁面や床面等に付着した油汚れを光照射による触媒酸化作用で分解する光触媒と、この光触媒に向けて界面活性剤を含む水分を噴霧する霧化手段とを備えていることにより、壁面に付着した油汚れを効果的に分解することができることが確認された。 As described above, a photocatalyst that is provided on a surface such as an indoor wall surface or floor surface and decomposes oil stains adhering to the wall surface or floor surface by catalytic oxidation action by light irradiation, and water containing a surfactant toward the photocatalyst. It was confirmed that the oil stain attached to the wall surface can be effectively decomposed by providing the atomizing means for spraying the water.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009081546A1 (en) * | 2007-12-21 | 2009-07-02 | Panasonic Corporation | Air conditioner |
| CN101903706B (en) * | 2007-12-21 | 2012-05-23 | 松下电器产业株式会社 | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2009081546A1 (en) * | 2007-12-21 | 2009-07-02 | Panasonic Corporation | Air conditioner |
| CN101903706B (en) * | 2007-12-21 | 2012-05-23 | 松下电器产业株式会社 | Air conditioner |
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