JP2020069438A - In-air floating matter collection material, air purifying member with use thereof and air purification device - Google Patents
In-air floating matter collection material, air purifying member with use thereof and air purification device Download PDFInfo
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- 238000004887 air purification Methods 0.000 title claims abstract description 66
- 239000000463 material Substances 0.000 title claims abstract description 60
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000007787 solid Substances 0.000 claims abstract description 40
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 229910052700 potassium Inorganic materials 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims description 34
- 239000010936 titanium Substances 0.000 claims description 14
- 239000011148 porous material Substances 0.000 abstract description 7
- 230000004931 aggregating effect Effects 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 description 17
- 239000013618 particulate matter Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 241000894006 Bacteria Species 0.000 description 6
- 238000001179 sorption measurement Methods 0.000 description 6
- 241000233866 Fungi Species 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 230000001788 irregular Effects 0.000 description 5
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 4
- 241000700605 Viruses Species 0.000 description 4
- 238000001878 scanning electron micrograph Methods 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000001917 fluorescence detection Methods 0.000 description 1
- 230000002538 fungal effect Effects 0.000 description 1
- 230000002070 germicidal effect Effects 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- QWPPOHNGKGFGJK-UHFFFAOYSA-N hypochlorous acid Chemical compound ClO QWPPOHNGKGFGJK-UHFFFAOYSA-N 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 239000011941 photocatalyst Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/003—Ventilation in combination with air cleaning
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
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- Organic Chemistry (AREA)
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- General Health & Medical Sciences (AREA)
- Public Health (AREA)
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- Inorganic Chemistry (AREA)
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Abstract
Description
本発明は、空気中浮遊物捕集材、これを用いる空気浄化部材及び空気浄化装置に関する。 The present invention relates to an airborne material trapping material, an air purifying member and an air purifying apparatus using the same.
従来、空気中の浮遊物に荷電させて凝集させることによりこれを捕集して空気を浄化する空気浄化装置が知られている（例えば、特許文献１参照）。 BACKGROUND ART Conventionally, there is known an air purifying device that purifies air by collecting floating matters in the air by charging and aggregating the suspended matters (see, for example, Patent Document 1).
特許文献１記載の装置は、電極針に対向して接地電極が配置された不平等電界発生装置と、不平等電界発生装置を通過した空気をろ過する超高性能フィルターとを備えている。そして、特許文献１記載の装置によれば、電極針と接地電極との間に２．５〜５．０ｋＶの電圧を印加してコロナ放電を発生させ、不平等電界発生装置を通過する空気中のエアロゾル粒子を凝集させることにより超高性能フィルターで捕捉し、空気を浄化できるとされている。 The device described in Patent Document 1 includes an unequal electric field generator in which a ground electrode is arranged so as to face an electrode needle, and an ultra-high performance filter that filters air that has passed through the unequal electric field generator. Then, according to the device described in Patent Document 1, a voltage of 2.5 to 5.0 kV is applied between the electrode needle and the ground electrode to generate corona discharge, and in the air passing through the unequal electric field generator. It is said that by aggregating the aerosol particles of, the particles can be captured by an ultra-high performance filter and the air can be purified.
しかしながら、特許文献１記載の装置では、空気中の浮遊物に荷電させて凝集させるために２．５〜５．０ｋＶの電圧を印加する必要があるという不都合がある。 However, the device described in Patent Document 1 has a disadvantage that it is necessary to apply a voltage of 2.5 to 5.0 kV in order to charge and aggregate the suspended matter in the air.
本発明は、かかる不都合を解消して、空気中の浮遊物に荷電させて凝集させることなく、該浮遊物を捕集することができる空気中浮遊物捕集材を提供することを目的とする。 An object of the present invention is to solve the above-mentioned inconvenience and to provide an airborne material trapping material that can collect the airborne material without causing the airborne material to be charged and aggregated. ..
また、本発明は、前記空気中浮遊物捕集材を用いる空気浄化部材及び空気浄化装置を提供することを目的とする。 Another object of the present invention is to provide an air purification member and an air purification device that use the airborne material trapping material.
本発明者らは、空気中の浮遊物を荷電させて凝集させることなく捕集できる材料について検討した結果、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなる多孔質体により該浮遊物を捕集できることを見出し、本発明を完成した。 The present inventors have investigated a material that can collect suspended matter in the air without being charged and agglomerated, and as a result, solid long fibrous nano-titanium oxide having a composition of (K, H) 2 Ti 2 O 5 is obtained. The present invention has been completed by discovering that the suspended matter can be collected by a porous body composed of.
前記中実長繊維状ナノ酸化チタンは、光触媒として使用できることが特許第４３９２２３１号公報に記載されており、除湿剤として用いることが特許第３９４４２３３号公報に記載されている。しかし、前記中実長繊維状ナノ酸化チタンからなる多孔質体により、空気中の浮遊物を荷電させて凝集させることなく捕集できることは知られていない。 It is described in Japanese Patent No. 4392231 that the solid long fibrous nano-titanium oxide can be used as a photocatalyst, and it is described in Japanese Patent No. 3944233 that it is used as a dehumidifying agent. However, it has not been known that a porous material composed of the solid long fibrous nano-titanium oxide can collect suspended matter in the air without charging and aggregating it.
そこで、前記目的を達成するために、本発明の空気中浮遊物捕集材は、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなる多孔質体であり、空気中の浮遊物の捕集に用いられることを特徴とする。 Therefore, in order to achieve the above-mentioned object, the airborne material trapping material of the present invention is a porous body made of solid long fibrous nano-titanium oxide having a composition of (K, H) 2 Ti 2 O 5. Yes, it is used to collect suspended matter in the air.
本発明の空気中浮遊物捕集材は、前記中実長繊維状ナノ酸化チタンが相互に絡み合って形成された多孔質体からなるので、空気中の浮遊物の捕集に適した気孔を備えており、該浮遊物を荷電させて凝集させることなく捕集することができる。前記空気中の浮遊物としは、菌類の胞子、細菌、ウィルス等の微生物、ＰＭ２．５と呼ばれる微小粒子状物質等を挙げることができる。 Since the airborne material trapping material of the present invention comprises a porous body formed by intertwining the solid long-fiber nanotitanium oxides, it has pores suitable for collecting airborne material. Therefore, the suspended matter can be collected without being charged and agglomerated. Examples of the suspended matter in the air include spores of fungi, microorganisms such as bacteria and viruses, and fine particulate matter called PM2.5.
本発明の空気中浮遊物捕集材において、前記中実長繊維状ナノ酸化チタンは２〜８０ｎｍの範囲の直径と１００ｎｍ以上の長さとを備え、相互に絡み合うことにより５〜５０μｍの範囲の平均粒子径を備える不定形多孔質粒子を形成していることが好ましい。この結果、前記中実長繊維状ナノ酸化チタンは、空気中の浮遊物の捕集に適した気孔を備える多孔質体を形成することができる。 In the airborne material trapping material of the present invention, the solid long fibrous nano-titanium oxide has a diameter in the range of 2 to 80 nm and a length of 100 nm or more, and by entwining with each other, an average in the range of 5 to 50 μm. It is preferable to form amorphous porous particles having a particle size. As a result, the solid long fibrous nano-titanium oxide can form a porous body having pores suitable for collecting suspended matter in the air.
また、本発明の空気中浮遊物捕集材において、前記多孔質体は、１００〜１４００ｍ２／ｇの範囲の比表面積と、７０〜９７％の範囲の空隙率とを備えることが好ましい。前記空隙率は、下式により求めることができる。 Moreover, in the airborne material trapping material of the present invention, it is preferable that the porous body has a specific surface area in the range of 100 to 1400 m 2 / g and a porosity in the range of 70 to 97%. The porosity can be calculated by the following formula.
空隙率（％）＝（真密度−嵩密度）×１００／真密度
前記多孔質体は、前記範囲の比表面積と空隙率とを備えることにより、空気中の浮遊物を荷電させて凝集させることなく捕集することができる。
Porosity (%) = (true density−bulk density) × 100 / true density The porous body has a specific surface area and a porosity in the above range, so that suspended matter in the air is charged and aggregated. Can be collected without.
本発明の空気浄化部材は、枠体と、該枠体内に位置し複数の中空筒状体からなる支持体と、該支持体に担持された前記多孔質体とからなることを特徴とする。 The air purification member of the present invention is characterized by comprising a frame body, a support body located inside the frame body and comprising a plurality of hollow cylindrical bodies, and the porous body carried on the support body.
本発明の空気浄化部材によれば、前記多孔質体からなる空気中浮遊物捕集材をユニット化することができ、空気浄化装置等の部品として用いることができる。 According to the air purification member of the present invention, the airborne material trapping material composed of the porous body can be unitized, and can be used as a component of an air purification apparatus or the like.
本発明の空気浄化装置は、一方の端部を吸気口とし他方の端部を還気口とするダクトと、該ダクト内に配置される前記空気浄化部材とを備えることを特徴とする。 The air purification apparatus of the present invention is characterized by including a duct having one end as an intake port and the other end as a return port, and the air purification member arranged in the duct.
本発明の空気浄化装置は、前記吸気口から導入された空気を前記空気浄化部材に通すことにより、導入された空気中の微生物、微小粒子状物質等の浮遊物を該空気浄化部材に捕集させることができ、浄化された空気を前記還気口から放出することができる。 The air purification apparatus of the present invention collects suspended matter such as microorganisms and fine particulate matter in the introduced air into the air purification member by passing the air introduced from the intake port through the air purification member. The purified air can be discharged from the return air port.
また、本発明の空気浄化装置は、前記空気浄化部材の前記吸気口側又は前記還気口側に紫外線を照射する紫外線照射手段を備えることが好ましい。本発明の空気浄化装置は、前記紫外線照射手段を備えることにより、該紫外線照射手段から前記空気浄化部材に紫外線を照射して該空気浄化部材に捕集された浮遊物の分解や前記微生物の滅菌を行うことができる。 Further, it is preferable that the air purification apparatus of the present invention includes an ultraviolet irradiation unit that irradiates the air purification member with the ultraviolet rays on the intake port side or the return air port side. The air purification apparatus of the present invention is provided with the ultraviolet irradiation means, whereby the ultraviolet irradiation means irradiates the air purification member with ultraviolet rays to decompose the suspended matter collected in the air purification member and sterilize the microorganisms. It can be performed.
前記紫外線照射手段は、前記空気浄化部材の前記吸気口側と前記還気口側とのどちらか一方に設けられていてもよく、両方に設けられていてもよい。 The ultraviolet irradiation means may be provided on either the intake port side or the return air port side of the air purification member, or may be provided on both sides.
次に、添付の図面を参照しながら本発明の実施の形態についてさらに詳しく説明する。 Next, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.
本実施形態の空気中浮遊物捕集材は、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなる多孔質体であり、空気中の浮遊物の捕集に用いられる。ここで、前記中実長繊維状ナノ酸化チタンは、図１Ａの走査型電子顕微鏡写真から明らかなように、２〜８０ｎｍの範囲の直径と１００ｎｍ以上の範囲の長さとを備えている。また、前記中実長繊維状ナノ酸化チタンは、図１Ａの走査型電子顕微鏡写真から明らかなように、中実である。 The airborne material trapping material of the present embodiment is a porous body made of solid long fibrous nano-titanium oxide having a composition of (K, H) 2 Ti 2 O 5 , and is used to collect airborne material. Used for collection. Here, the solid long fibrous nano-titanium oxide has a diameter in the range of 2 to 80 nm and a length in the range of 100 nm or more, as is apparent from the scanning electron micrograph of FIG. 1A. The solid long fibrous nano-titanium oxide is solid, as is clear from the scanning electron micrograph of FIG. 1A.
前記中実長繊維状ナノ酸化チタンは、例えば、酸化チタンを主成分とする材料をアルカリ性水溶液中で加熱処理することにより得ることができる。前記酸化チタンを主成分とする材料は、粉末状でもよく、含水酸化チタン若しくは水和酸化チタン又はこれらを含むスラリーでもよい。 The solid long fibrous nano titanium oxide can be obtained, for example, by subjecting a material containing titanium oxide as a main component to a heat treatment in an alkaline aqueous solution. The material containing titanium oxide as a main component may be in the form of powder, or may be hydrous titanium oxide, hydrated titanium oxide, or a slurry containing these.
前記アルカリ性水溶液としては、水酸化ナトリウム又は水酸化カリウムの水溶液を用いることができ、その濃度は５〜２５モル／ｋｇの範囲であることが好ましい。また、処理温度は７０〜１５０℃の範囲とすることが好ましく、処理時間は１０〜３０時間の範囲とすることが好ましい。 An aqueous solution of sodium hydroxide or potassium hydroxide can be used as the alkaline aqueous solution, and the concentration thereof is preferably in the range of 5 to 25 mol / kg. Further, the treatment temperature is preferably in the range of 70 to 150 ° C., and the treatment time is preferably in the range of 10 to 30 hours.
このように処理することにより、２〜８０ｎｍの範囲の直径と１００ｎｍ以上の長さとを備える前記中実長繊維状ナノ酸化チタンが相互に絡み合うことにより５〜５０μｍの範囲の平均粒子径を備える不定形多孔質粒子を得ることができる。また、前記処理により得られる前記中実長繊維状ナノ酸化チタンは、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備えることが特許第４３９２２３１号公報に記載されている。 By such treatment, the solid long fibrous nano-titanium oxide having a diameter in the range of 2 to 80 nm and a length of 100 nm or more is intertwined with each other so that the average particle diameter in the range of 5 to 50 μm is not obtained. It is possible to obtain shaped porous particles. Further, Japanese Patent No. 4392231 discloses that the solid long fibrous nano-titanium oxide obtained by the treatment has a composition of (K, H) 2 Ti 2 O 5 .
前記中実長繊維状ナノ酸化チタンが絡み合った不定形多孔質粒子は、１００〜１４００ｍ２／ｇの範囲の比表面積と、７０〜９７％の範囲の空隙率とを備える多孔質体を形成することができるので、該多孔質体を本実施形態の空気中浮遊物捕集材とすることができる。 The amorphous porous particles in which the solid long fibrous nano-titanium oxides are intertwined form a porous body having a specific surface area in the range of 100 to 1400 m 2 / g and a porosity in the range of 70 to 97%. Therefore, the porous body can be used as the airborne material trapping material of the present embodiment.
本実施形態の空気中浮遊物捕集材によれば、空気中の浮遊物として、菌類の胞子、細菌、ウィルス等の微生物、ＰＭ２．５と呼ばれる微小粒子状物質等を荷電させて凝集させることなく捕集することができる。前記菌類の胞子は５〜１２μｍ程度、前記細菌は０．５〜５μｍ程度、前記ウィルスは５０〜数百ｎｍ程度、前記ＰＭ２．５は２．５μｍ以下の大きさを備えている。 According to the airborne material trapping material of this embodiment, fungal spores, microorganisms such as bacteria and viruses, and fine particulate matter called PM2.5 are charged and aggregated as airborne material. Can be collected without. The spores of the fungus have a size of about 5 to 12 μm, the bacterium has a size of about 0.5 to 5 μm, the virus has a size of about 50 to several hundred nm, and the PM2.5 has a size of 2.5 μm or less.
次に、図２を参照して、本実施形態の空気浄化部材１の構成について説明する。 Next, with reference to FIG. 2, the configuration of the air purification member 1 of the present embodiment will be described.
空気浄化部材１は、枠体２と、枠体２の内側に取り付けられた支持体３と、支持体３に担持された多孔質体４とからなる。前記支持体３は、紙又は繊維の成形体からなる複数の中空筒状体からなり、該中空筒状体はハニカム状、コルゲート状、メッシュ状等の形状とすることができる。前記多孔質体４としては、本実施形態の空気中浮遊物捕集材を用いることができる。前記多孔質体４は前記支持体３に担持されていればよく、前記中空筒状体に完全に隙間無く充填されていなくてもよい。 The air purification member 1 includes a frame body 2, a support body 3 attached to the inside of the frame body 2, and a porous body 4 carried by the support body 3. The support 3 is composed of a plurality of hollow tubular bodies made of paper or fiber moldings, and the hollow tubular bodies can be formed into a honeycomb shape, a corrugated shape, a mesh shape, or the like. As the porous body 4, the airborne material trapping material of this embodiment can be used. It suffices that the porous body 4 is supported by the support body 3, and the hollow cylindrical body need not be completely filled with no space.
尚、空気浄化部材１は、枠体２の内側に、多孔質体４を含むフィルター状体が配設された構成であってもよい。 The air purification member 1 may have a configuration in which a filter-like body including the porous body 4 is disposed inside the frame body 2.
次に、図３を参照して、本実施形態の空気浄化装置１１の構成について説明する。 Next, with reference to FIG. 3, the configuration of the air purification device 11 of the present embodiment will be described.
空気浄化装置１１は角型ダクト１２の一方の側面に吸気口１３を備え、吸気口１３に対向する側面に還気口１４を備える一方、吸気口１３と還気口１４との間に空気浄化部材１５を備え、空気浄化部材１５により角型ダクト１２を吸気口１３側の空間と還気口１４側の空間とに分けている。空気浄化部材１５としては、図２に示す空気浄化部材１を用いることができる。角型ダクト１２の吸気口１３側の空間には吸気口１３から空気を吸引する送風機１６が配設されている。 The air purifier 11 includes an intake port 13 on one side surface of the rectangular duct 12 and a return air port 14 on a side surface facing the intake port 13, while air purification is performed between the intake port 13 and the return air port 14. The member 15 is provided, and the air-purifying member 15 divides the rectangular duct 12 into a space on the intake port 13 side and a space on the return air port 14 side. As the air purification member 15, the air purification member 1 shown in FIG. 2 can be used. A blower 16 that sucks air from the intake port 13 is arranged in a space on the intake port 13 side of the rectangular duct 12.
また、空気浄化装置１１は角型ダクト１２の吸気口１３側の空間と還気口１４側の空間との両方の空気浄化部材１５に対向する側面に、空気浄化部材１５に紫外線を照射する紫外線照射手段としての紫外線発光ダイオード１７を備えている。 Further, in the air purification device 11, ultraviolet rays that irradiate the air purification member 15 with ultraviolet rays are applied to the side surfaces of the rectangular duct 12 facing the air purification member 15 in both the space on the intake port 13 side and the space on the return air port 14 side. An ultraviolet light emitting diode 17 as an irradiation means is provided.
次に、本実施形態の空気浄化装置１１の構成について説明する。 Next, the configuration of the air purification device 11 of the present embodiment will be described.
空気浄化装置１１は、例えば、空気浄化を必要とする室内に配置され、該室内の空気を送風機１６により吸気口１３から吸引して空気浄化部材１５（１）に導入する。吸気口１３から空気浄化部材１５（１）に導入された空気中には前記微生物や微小粒子状物質等が浮遊しているが、空気浄化部材１５（１）は前記中実長繊維状ナノ酸化チタンからなる多孔質体４を備えているので、該微生物や微小粒子状物質等は多孔質体４に捕集される。この結果、浄化された空気が空気浄化部材１５（１）を透過し、還気口１４から前記室内に放出（還気）される。 The air purification device 11 is arranged, for example, in a room requiring air purification, and sucks the air in the room from the intake port 13 by the blower 16 and introduces the air into the air purification member 15 (1). Although the microorganisms and fine particulate matter are suspended in the air introduced into the air purifying member 15 (1) from the intake port 13, the air purifying member 15 (1) has the solid long fibrous nano-oxidized state. Since the porous body 4 made of titanium is provided, the microorganisms and the fine particulate matter are collected in the porous body 4. As a result, the purified air passes through the air purifying member 15 (1) and is discharged (return air) from the return air port 14 into the room.
このとき、空気浄化装置１１では、紫外線発光ダイオード１７から空気浄化部材１５（１）に紫外線を照射することにより、多孔質体４に捕集された浮遊物の分解や前記微生物の滅菌を行うことができる。紫外線発光ダイオード１７は、波長３６５ｎｍの紫外線を照射することにより、酸化チタンの光触媒効果を得られる一方、波長２６０ｎｍの殺菌灯に近い効果を得ることができる。 At this time, in the air purification device 11, the ultraviolet light emitting diode 17 irradiates the air purification member 15 (1) with ultraviolet rays to decompose the suspended matter collected in the porous body 4 or sterilize the microorganisms. You can The ultraviolet light emitting diode 17 can obtain the photocatalytic effect of titanium oxide by irradiating it with ultraviolet light having a wavelength of 365 nm, while obtaining an effect close to that of a germicidal lamp having a wavelength of 260 nm.
空気浄化装置１１では、前記微生物の滅菌のために、紫外線発光ダイオード１７に代えて紫外線ライト、水銀灯、ハロゲン灯等を用いてもよく、オゾン、次亜塩素酸、二酸化塩素等のガスを作用させてもよい。 In the air purifying apparatus 11, in order to sterilize the microorganisms, an ultraviolet light, a mercury lamp, a halogen lamp or the like may be used instead of the ultraviolet light emitting diode 17, and a gas such as ozone, hypochlorous acid, chlorine dioxide or the like is used. May be.
また、空気浄化装置１１では、紫外線等の光線を空気浄化部材１５（１）に照射すると、酸化チタンの自浄作用により、空気中の浮遊物の捕集、浄化、滅菌の作用を持続させることができる。 Further, in the air purifying apparatus 11, when the air purifying member 15 (1) is irradiated with light rays such as ultraviolet rays, the self-cleaning action of titanium oxide makes it possible to continue the action of collecting, purifying, and sterilizing suspended matter in the air. it can.
次に、本発明の実施例を示す。 Next, examples of the present invention will be described.
本実施例では、まず、容器に単粒子径２０ｎｍの酸化チタン粉末０．２１ｇを取り、１７モル／ｋｇの濃度の水酸化カリウム水溶液を投入して撹拌後、容器を密封して乾燥機に収容し、１１０℃の温度で２０時間静置した。２０時間経過後に容器を取り出し、希塩酸で余剰のアルカリ分を中和処理した。次に、遠心分離機を用いて固形分を分離し、得られた固形分をイオン交換水で洗浄した後、凍結乾燥機で乾燥して、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンを得た。 In this example, first, 0.21 g of titanium oxide powder having a single particle diameter of 20 nm was placed in a container, an aqueous potassium hydroxide solution having a concentration of 17 mol / kg was added and stirred, and then the container was sealed and housed in a dryer. Then, it was allowed to stand at a temperature of 110 ° C. for 20 hours. After 20 hours, the container was taken out and the excess alkali content was neutralized with dilute hydrochloric acid. Next, the solid content is separated using a centrifuge, the obtained solid content is washed with ion-exchanged water, and then dried with a freeze dryer to obtain a composition of (K, H) 2 Ti 2 O 5 . A solid long fibrous nano titanium oxide was prepared.
前記中実長繊維状ナノ酸化チタンは、５〜２０ｎｍ程度の直径に対して、長さが数百ｎｍ、あるいは、数ｍｍに及び、相互に絡み合うことにより平均粒子径２３μｍの不定形多孔質粒子を形成しており、特許第３９４４２３３号公報に記載されている乾燥重量の３０質量％以上の水分吸着能力を備える特徴を有し、温度２５℃での水蒸気吸着量の測定において、その乾燥質量に対して相対湿度７２％以上で３０質量％を超え、相対湿度９５％では８５質量％となる水蒸気吸着量を備えていた。本実施例では、前記不定形多孔質粒子を用い、比表面積３７６ｍ２／ｇ、空隙率は、９１．２％の多孔質体を得た。 The solid long fibrous nano-titanium oxide has a diameter of about 5 to 20 nm and a length of several hundreds nm or several mm, and by being entangled with each other, the irregular particle having an average particle diameter of 23 μm is formed. And has a characteristic of having a water adsorption capacity of 30% by mass or more of the dry weight described in Japanese Patent No. 3944233, and in the measurement of the water vapor adsorption amount at a temperature of 25 ° C., the dry mass is On the other hand, the amount of water vapor adsorption was more than 30% by mass at a relative humidity of 72% or more and 85% by mass at a relative humidity of 95%. In this example, using the amorphous porous particles, a porous body having a specific surface area of 376 m 2 / g and a porosity of 91.2% was obtained.
次に、本実施例で得られた前記中実長繊維状ナノ酸化チタンからなる多孔質体を用いて、図２に示す空気浄化部材１を形成し、空気浄化部材１を空気浄化部材１５として、図３に示す空気浄化装置１１を形成した。本実施例の空気浄化装置１１では、波長３６５ｎｍの紫外線を照射する紫外線発光ダイオード１７を空気浄化部材１５の表面から５００ｍｍ離して配置した。 Next, the air purification member 1 shown in FIG. 2 is formed using the porous body made of the solid long fibrous nano-titanium oxide obtained in this example, and the air purification member 1 is used as the air purification member 15. The air purification device 11 shown in FIG. 3 was formed. In the air purification apparatus 11 of the present embodiment, the ultraviolet light emitting diode 17 that radiates ultraviolet rays having a wavelength of 365 nm is arranged 500 mm away from the surface of the air purification member 15.
次に、紫外線発光ダイオード１７から紫外線を照射しなかった場合（実施例１）と、紫外線を照射した場合（実施例２）とのそれぞれについて、空気浄化装置１１に５ｍ3／分の風量で１２０分間通風し、その間、吸気口１３及び還気口１４付近の空気をサンプリングして、通過前と通過後の空気中の浮遊物としての微粒子と微生物の量とを比較した。 Next, with respect to each of the case where the ultraviolet light emitting diode 17 did not radiate the ultraviolet ray (Example 1) and the case where the ultraviolet ray was radiated (Example 2), the air purifying device 11 was operated at an air flow rate of 5 m 3 / min to 120 The air was blown for a minute, and during that time, the air around the intake port 13 and the return air port 14 was sampled, and the amounts of fine particles and microorganisms as suspended matter in the air before and after passing were compared.
微粒子量は、ＳＰＭ（浮遊粒子状物質）として、ＫＡＮＯＭＡＸ社製粉じん計を用い、光散乱法により測定した。また、微生物量は、シャープ株式会社製微生物センサを用い、蛍光検出法により測定した。微生物量の単位ｖ／秒は、真菌や細菌等を区別しない不特定多数の微生物の蛍光の総量であり、０．１ｖ／秒は真菌換算で約２０００個／ｍ３、細菌換算で約５０００個／ｍ３に相当する。結果を表１に示す。 The amount of fine particles was measured by a light scattering method using a dust meter manufactured by KANOMAX as SPM (suspended particulate matter). The amount of microorganisms was measured by a fluorescence detection method using a microorganism sensor manufactured by Sharp Corporation. The unit v / sec of the amount of microorganisms is the total amount of fluorescence of unspecified large numbers of microorganisms that do not distinguish between fungi and bacteria, and 0.1 v / sec is approximately 2000 cells / m 3 in terms of fungi, and 5000 cells in terms of bacteria. corresponding to the / m 3. The results are shown in Table 1.
表１から、本実施例の空気浄化装置１１によれば、空気中の浮遊物を荷電させて凝集させることなく捕集して空気を浄化することができることが明らかであり、空気浄化部材１５に紫外線を照射することにより浮遊物の分解や微生物の滅菌についてさらに優れた効果を得ることができることが明らかである。 It is clear from Table 1 that according to the air purification apparatus 11 of the present embodiment, the suspended matter in the air can be charged and collected without being aggregated to purify the air. It is clear that irradiation with ultraviolet rays can bring about more excellent effects on the decomposition of suspended solids and the sterilization of microorganisms.
１，１５…空気浄化部材、 ２…枠体、 ３…支持体、 ４…多孔質体、 １１…空気浄化装置、 １２…ダクト、 １３…吸気口、 １４…還気口、 １７…紫外線照射手段。 1, 15 ... Air purification member, 2 ... Frame body, 3 ... Support body, 4 ... Porous body, 11 ... Air purification device, 12 ... Duct, 13 ... Intake port, 14 ... Return air port, 17 ... Ultraviolet irradiation means ..
そこで、前記目的を達成するために、本発明の空気中浮遊物捕集材は、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備え、２〜８０ｎｍの範囲の直径と１００ｎｍ以上の長さとを備える中実長繊維状ナノ酸化チタンが相互に絡み合うことにより形成された、５〜５０μｍの範囲の平均粒子径を備える不定形多孔質粒子が、紙又は繊維の成形体からなる複数の中空筒状体からなる支持体に、該中空筒状体に完全に隙間無く充填されることなく担持されて、空気中の５０ｎｍ〜１２μｍの大きさの浮遊物を捕集に用いられることを特徴とする。 Therefore, in order to achieve the above object, airborne matter trapping material of the present invention, (K, H) comprises a composition of 2 Ti 2 O 5, and the length of the diameter and 100nm or more ranges of 2~80nm A plurality of hollow cylinders, each of which is formed by intertwining solid long fibrous nano-titanium oxide with each other and has an average particle size in the range of 5 to 50 μm It is characterized in that it is supported on a support made of a spherical body without being completely filled in the hollow cylindrical body without any gap , and is used for collecting suspended matter in the air having a size of 50 nm to 12 μm. ..
本発明の空気中浮遊物捕集材は、前記中実長繊維状ナノ酸化チタンが相互に絡み合って形成された不定形多孔質粒子からなるので、空気中の浮遊物の捕集に適した気孔を備えており、該浮遊物を荷電させて凝集させることなく捕集することができる。前記空気中の浮遊物としは、菌類の胞子、細菌、ウィルス等の微生物、ＰＭ２．５と呼ばれる微小粒子状物質等を挙げることができる。 The airborne material trapping material of the present invention is composed of amorphous porous particles formed by intertwining the solid long fibrous nano-titanium oxides, and therefore has pores suitable for trapping airborne material. Is provided, and the suspended matter can be collected without being charged and aggregated. Examples of the suspended matter in the air include spores of fungi, microorganisms such as bacteria and viruses, and fine particulate matter called PM2.5.
本発明の空気中浮遊物捕集材において、前記中実長繊維状ナノ酸化チタンは２〜８０ｎｍの範囲の直径と１００ｎｍ以上の長さとを備え、相互に絡み合うことにより５〜５０μｍの範囲の平均粒子径を備える不定形多孔質粒子を形成している。この結果、前記中実長繊維状ナノ酸化チタンは、空気中の浮遊物の捕集に適した気孔を備える多孔質体を形成することができる。 In the airborne material trapping material of the present invention, the solid long fibrous nano-titanium oxide has a diameter in the range of 2 to 80 nm and a length of 100 nm or more, and by entwining with each other, an average in the range of 5 to 50 μm. that form a irregular porous particles with a particle diameter. As a result, the solid long fibrous nano-titanium oxide can form a porous body having pores suitable for collecting suspended matter in the air.
また、本発明の空気中浮遊物捕集材において、前記不定形多孔質粒子は、１００〜１４００ｍ２／ｇの範囲の比表面積と、７０〜９７％の範囲の空隙率とを備えることが好ましい。前記空隙率は、下式により求めることができる。 Further, in the airborne material collecting material of the present invention, it is preferable that the irregular-shaped porous particles have a specific surface area in the range of 100 to 1400 m 2 / g and a porosity in the range of 70 to 97%. .. The porosity can be calculated by the following formula.
本発明の空気浄化部材は、枠体と、該枠体内に位置し紙又は繊維の成形体からなり複数の中空筒状体からなる支持体と、該中空筒状体に完全に隙間無く充填されることなく担持された不定形多孔質粒子とからなり、該不定形多孔質粒子は（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなることを特徴とする。 The air purification member of the present invention includes a frame body, a support body located inside the frame body and formed of a plurality of hollow cylindrical bodies made of paper or fibers, and a hollow cylindrical body completely filled with no space. It consists of a Rukoto without supported irregular porous particles, the irregular porous particles and characterized in that it consists of actual length fibrous nano titanium oxide in comprising the composition of (K, H) 2 Ti 2 O 5 To do.
本発明の空気浄化部材によれば、前記不定形多孔質粒子からなる空気中浮遊物捕集材をユニット化することができ、空気浄化装置等の部品として用いることができる。 According to the air purification member of the present invention, the airborne material trapping material composed of the irregular-shaped porous particles can be unitized, and can be used as a component of an air purification device or the like.
本発明の空気浄化装置は、一方の端部を吸気口とし他方の端部を還気口とするダクトと、該ダクト内に配置される空気浄化部材とを備え、該空気浄化部材は、枠体と、該枠体内に位置し紙又は繊維の成形体からなり複数の中空筒状体からなる支持体と、該中空筒状体に完全に隙間無く充填されることなく担持され、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなる不定形多孔質粒子とからなることを特徴とする。 The air purification apparatus of the present invention includes a duct having one end as an intake port and the other end as a return port, and an air purification member disposed in the duct, and the air purification member is a frame. A body, a support body formed of a plurality of hollow tubular bodies made of a paper or fiber molded body located in the frame body, and carried on the hollow tubular body without being completely filled with a gap (K, characterized in that consisting of amorphous porous particles made of the actual length fibrous nano titanium oxide in comprising the composition of H) 2 Ti 2 O 5.
本実施形態の空気中浮遊物捕集材は、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなる不定形多孔質粒子であり、空気中の浮遊物の捕集に用いられる。ここで、前記中実長繊維状ナノ酸化チタンは、図１Ａの走査型電子顕微鏡写真から明らかなように、２〜８０ｎｍの範囲の直径と１００ｎｍ以上の範囲の長さとを備えている。また、前記中実長繊維状ナノ酸化チタンは、図１Ａの走査型電子顕微鏡写真から明らかなように、中実である。 The airborne material trapping material of the present embodiment is amorphous porous particles composed of solid long fibrous nano-titanium oxide having a composition of (K, H) 2 Ti 2 O 5 , and is a suspended material in the air. Used to collect the. Here, the solid long fibrous nano-titanium oxide has a diameter in the range of 2 to 80 nm and a length in the range of 100 nm or more, as is apparent from the scanning electron micrograph of FIG. 1A. Further, the solid long fibrous nano-titanium oxide is solid as is clear from the scanning electron micrograph of FIG. 1A.
空気浄化部材１は、枠体２と、枠体２の内側に取り付けられた支持体３と、支持体３に担持された不定形多孔質粒子４とからなる。前記支持体３は、紙又は繊維の成形体からなる複数の中空筒状体からなり、該中空筒状体はハニカム状、コルゲート状、メッシュ状等の形状とすることができる。前記不定形多孔質粒子４としては、本実施形態の空気中浮遊物捕集材を用いることができる。前記不定形多孔質粒子４は前記支持体３に担持されていればよく、前記中空筒状体に完全に隙間無く充填されていなくてもよい。 The air purification member 1 is composed of a frame body 2, a support body 3 attached to the inside of the frame body 2, and amorphous porous particles 4 carried on the support body 3. The support 3 is composed of a plurality of hollow tubular bodies made of paper or fiber moldings, and the hollow tubular bodies can be formed into a honeycomb shape, a corrugated shape, a mesh shape, or the like. As the irregular-shaped porous particles 4, the airborne material trapping material of the present embodiment can be used. The irregular-shaped porous particles 4 need only be supported on the support 3, and may not be completely filled in the hollow cylindrical body without a gap.
空気浄化装置１１は、例えば、空気浄化を必要とする室内に配置され、該室内の空気を送風機１６により吸気口１３から吸引して空気浄化部材１５（１）に導入する。吸気口１３から空気浄化部材１５（１）に導入された空気中には前記微生物や微小粒子状物質等が浮遊しているが、空気浄化部材１５（１）は前記中実長繊維状ナノ酸化チタンからなる不定形多孔質粒子４を備えているので、該微生物や微小粒子状物質等は不定形多孔質粒子４に捕集される。この結果、浄化された空気が空気浄化部材１５（１）を透過し、還気口１４から前記室内に放出（還気）される。 The air purification device 11 is arranged, for example, in a room requiring air purification, and sucks the air in the room from the intake port 13 by the blower 16 and introduces the air into the air purification member 15 (1). Although the microorganisms and fine particulate matter are suspended in the air introduced into the air purifying member 15 (1) from the intake port 13, the air purifying member 15 (1) has the solid long fibrous nano-oxidized state. Since the amorphous porous particles 4 made of titanium are provided, the microorganisms, the fine particulate matter, and the like are collected by the amorphous porous particles 4. As a result, the purified air passes through the air purifying member 15 (1) and is discharged (return air) from the return air port 14 into the room.
前記中実長繊維状ナノ酸化チタンは、５〜２０ｎｍ程度の直径に対して、長さが数百ｎｍ、あるいは、数ｍｍに及び、相互に絡み合うことにより平均粒子径２３μｍの不定形多孔質粒子を形成しており、特許第３９４４２３３号公報に記載されている乾燥重量の３０質量％以上の水分吸着能力を備える特徴を有し、温度２５℃での水蒸気吸着量の測定において、その乾燥質量に対して相対湿度７２％以上で３０質量％を超え、相対湿度９５％では８５質量％となる水蒸気吸着量を備えていた。本実施例では、前記不定形多孔質粒子を用い、比表面積３７６ｍ２／ｇ、空隙率は、９１．２％の不定形多孔質粒子を得た。 The solid long fibrous nano-titanium oxide has a diameter of about 5 to 20 nm and a length of several hundreds nm or several mm, and by being entangled with each other, the irregular particle having an average particle diameter of 23 μm is formed. And has a characteristic of having a water adsorption capacity of 30% by mass or more of the dry weight described in Japanese Patent No. 3944233, and in the measurement of the water vapor adsorption amount at a temperature of 25 ° C., the dry mass is On the other hand, the amount of water vapor adsorption was more than 30% by mass at a relative humidity of 72% or more and 85% by mass at a relative humidity of 95%. In this embodiment, using the amorphous porous particles, specific surface area of 376m 2 / g, porosity was obtained amorphous porous particles 91.2%.
次に、本実施例で得られた前記中実長繊維状ナノ酸化チタンからなる不定形多孔質粒子を用いて、図２に示す空気浄化部材１を形成し、空気浄化部材１を空気浄化部材１５として、図３に示す空気浄化装置１１を形成した。本実施例の空気浄化装置１１では、波長３６５ｎｍの紫外線を照射する紫外線発光ダイオード１７を空気浄化部材１５の表面から５００ｍｍ離して配置した。 Next, the air purifying member 1 shown in FIG. 2 is formed by using the amorphous porous particles composed of the solid long fibrous nano titanium oxide obtained in this example, and the air purifying member 1 is replaced with the air purifying member. As 15, the air purification device 11 shown in FIG. 3 was formed. In the air purification apparatus 11 of the present embodiment, the ultraviolet light emitting diode 17 that radiates ultraviolet rays having a wavelength of 365 nm is arranged 500 mm away from the surface of the air purification member 15.
１，１５…空気浄化部材、 ２…枠体、 ３…支持体、 ４…不定形多孔質粒子、 １１…空気浄化装置、 １２…ダクト、 １３…吸気口、 １４…還気口、 １７…紫外線照射手段。 1, 15 ... Air purification member, 2 ... Frame body, 3 ... Support body, 4 ... Amorphous porous particles , 11 ... Air purification device, 12 ... Duct, 13 ... Intake port, 14 ... Return air port, 17 ... Ultraviolet ray Irradiation means.
Claims (6)
該多孔質体は（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなることを特徴とする空気浄化部材。 A frame body, a support body located in the frame body and formed of a plurality of hollow cylindrical bodies, and a porous body carried by the support body,
The air purification member, wherein the porous body is made of solid long fibrous nano-titanium oxide having a composition of (K, H) 2 Ti 2 O 5 .
該空気浄化部材は、枠体と、該枠体内に位置し複数の中空筒状体からなる支持体と、該支持体に担持され、（Ｋ、Ｈ）２Ｔｉ２Ｏ５の組成を備える中実長繊維状ナノ酸化チタンからなる多孔質体とからなることを特徴とする空気浄化装置。 A duct having one end as an intake port and the other end as a return port, and an air purifying member disposed in the duct,
The air purification member has a frame body, a support body located in the frame body and formed of a plurality of hollow cylindrical bodies, and a carrier supported on the support body and having a composition of (K, H) 2 Ti 2 O 5. An air purification device comprising a porous body made of real long fibrous nano titanium oxide.
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| JP6570153B1 (en) | 2019-09-04 |
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