JPH07113272A - Building material with moisture-absorptive and desorptive functions - Google Patents
Building material with moisture-absorptive and desorptive functionsInfo
- Publication number
- JPH07113272A JPH07113272A JP26253293A JP26253293A JPH07113272A JP H07113272 A JPH07113272 A JP H07113272A JP 26253293 A JP26253293 A JP 26253293A JP 26253293 A JP26253293 A JP 26253293A JP H07113272 A JPH07113272 A JP H07113272A
- Authority
- JP
- Japan
- Prior art keywords
- moisture
- photocatalyst
- building material
- film
- absorbent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004566 building material Substances 0.000 title claims abstract description 17
- 239000011941 photocatalyst Substances 0.000 claims abstract description 31
- 239000002250 absorbent Substances 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 230000002745 absorbent Effects 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 4
- 239000002184 metal Substances 0.000 claims abstract description 4
- 239000000741 silica gel Substances 0.000 claims abstract description 4
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 4
- 229910021536 Zeolite Inorganic materials 0.000 claims abstract description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims abstract description 3
- -1 sulfide metals Chemical class 0.000 claims abstract description 3
- 239000010457 zeolite Substances 0.000 claims abstract description 3
- 239000003230 hygroscopic agent Substances 0.000 claims description 26
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 6
- 239000004744 fabric Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 3
- 229910052602 gypsum Inorganic materials 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 229910052976 metal sulfide Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 14
- 238000010521 absorption reaction Methods 0.000 abstract description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- 229960001866 silicon dioxide Drugs 0.000 abstract 1
- 229910003158 γ-Al2O3 Inorganic materials 0.000 abstract 1
- 239000000843 powder Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 5
- 229910052753 mercury Inorganic materials 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000003213 activating effect Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004070 electrodeposition Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 229920002785 Croscarmellose sodium Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Building Environments (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、雰囲気を快適湿度に維
持するのに好適な吸湿・放湿機能を備えた建材に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a building material having a moisture absorbing / releasing function suitable for maintaining an atmosphere of comfortable humidity.
【０００２】[0002]
【従来の技術】人が快適に感じる環境は、温度２０〜２
６℃及び相対湿度５０〜７０％の雰囲気である。快適温
度を得るため、各種のヒータ，クーラ，冷暖房機器等が
使用されている。快適湿度は、除湿器，加湿器等の空調
機器で得ている。何れの機器においても、電気や化石燃
料に代表されるエネルギーを多量に消費する。最近で
は、省エネルギーを狙った建築構造が採用されるように
なってきている。たとえば、窓，出入り口等の開口部を
少なくし、建屋の断熱性を高めた構造がある。また、太
陽光を直接，間接に取り入れ、屋内を暖房又は冷房する
こともある。温度調節に関しては、これらの方法によっ
て快適環境の条件を達成することができる。しかし、湿
度調節は、床下や天井に吸湿剤，吸湿シート等を敷設す
ること等が採用されているものの、エネルギー消費型の
機器に代わる有効な手段が実用化されていない。2. Description of the Related Art An environment in which a person feels comfortable is at a temperature of 20 to 2
The atmosphere is 6 ° C. and a relative humidity of 50 to 70%. Various types of heaters, coolers, and heating / cooling equipment are used to obtain a comfortable temperature. Comfortable humidity is obtained with air conditioners such as dehumidifiers and humidifiers. Both devices consume a large amount of energy typified by electricity and fossil fuels. Recently, building structures aiming to save energy have been adopted. For example, there is a structure in which the number of openings such as windows and doorways is reduced to improve the heat insulation of the building. In addition, sunlight may be directly or indirectly introduced to heat or cool the interior of the room. With regard to temperature regulation, the conditions of a comfortable environment can be achieved by these methods. However, for humidity control, although laying a hygroscopic agent, a hygroscopic sheet, or the like under the floor or ceiling is adopted, an effective means to replace an energy-consuming device has not been put into practical use.
【０００３】[0003]
【発明が解決しようとする課題】シリカゲル等の吸湿剤
を配置するだけでは、吸着水分が飽和量に達すると吸湿
特性が示されなくなる。そのため、高湿雰囲気が長期に
わたって続く梅雨時期等では、吸湿機能を持続させるこ
とができない。また、風呂場や炊事場等のように水分が
定常的に多い環境では、吸湿剤の特性が短期間で失われ
る。その結果、このような環境は、清潔に保つことが強
く要求される居住空間であるにも拘らず、カビの発生が
激しい環境となる。また、ツーバイフォア工法やプレハ
ブ等の工業化住宅では、断熱性，遮音性，気密性等を改
善するため、窓，出入り口等の開口部面積を小さく設計
している。そのため、工業化住宅は、一般の住宅に比較
して換気が悪く、床，壁，天井等に結露が生じ易い。結
露水は、建材表面に模様となって残り、住環境が醸し出
す印象を著しく悪化させる。本発明は、このような問題
を解消すべく案出されたものであり、吸湿能を繰り返し
高める機能を付与することにより、長期間にわたって最
適湿度条件を維持することができる建材を提供すること
を目的とする。If only a hygroscopic agent such as silica gel is arranged, the hygroscopic property will not be exhibited when the adsorbed moisture reaches the saturated amount. Therefore, the moisture absorption function cannot be maintained during the rainy season when the high humidity atmosphere continues for a long period of time. Further, in an environment such as a bathroom or a kitchen where the water content is constantly high, the characteristics of the moisture absorbent are lost in a short period of time. As a result, although such an environment is a living space that is strongly required to be kept clean, it is an environment where mold is severely generated. In addition, in industrialized houses such as the two-by-fore method and prefabricated houses, the opening area of windows, doorways, etc. is designed to be small in order to improve heat insulation, sound insulation, and airtightness. Therefore, the ventilation of an industrialized house is poorer than that of a general house, and dew condensation easily occurs on the floor, walls, ceiling, and the like. Condensed water remains as a pattern on the surface of building materials, and significantly deteriorates the impression that the living environment creates. The present invention has been devised to solve such a problem, and by providing a function of repeatedly increasing the moisture absorption capacity, it is possible to provide a building material capable of maintaining optimum humidity conditions for a long period of time. To aim.
【０００４】[0004]
【課題を解決するための手段】本発明の建材は、その目
的を達成するため、吸湿剤と光触媒とを配合した皮膜が
基材の表面に形成されており、光触媒によって吸湿剤が
賦活される。吸湿剤としては、γ−Ａｌ2 Ｏ3 ，ゼオラ
イト，シリカゲル，吸水性高分子等が使用される。吸水
性コウブンシトシテハ、澱粉，アクリル酸塩のクラフト
重合体，カルボキシメチルセルロース架橋体等がある。
光触媒としては、ＴｉＯ2 ，ＷＯ3 ，ＺｎＯ，ＳｒＴｉ
Ｏ3 ，ＢａＴｉ4 Ｏ9 ，ＲｂＰｂ2 Ｎｂ3 Ｏ10，ＺｒＯ
2 ，金属硫化物等が使用される。吸湿剤は、水分吸着を
効果的に行う上から、比表面積が大きなものほど好まし
い。具体的には、１０ｍ2 ／ｇ以上の比表面積であれ
ば、本発明の吸湿剤として使用される。光触媒も、吸湿
剤に対する賦活作用を考慮し、１０ｍ2 ／ｇ以上の比表
面積をもつものが好ましい。また、小径の光触媒を使用
し、吸湿剤の表面に光触媒を付着させることもできる。In order to achieve the object, the building material of the present invention has a film formed by mixing a hygroscopic agent and a photocatalyst on the surface of a substrate, and the photocatalyst activates the hygroscopic agent. . As the hygroscopic agent, γ-Al 2 O 3 , zeolite, silica gel, water-absorbing polymer and the like are used. There are water absorbent water, starch, kraft polymer of acrylate, crosslinked carboxymethyl cellulose, etc.
As the photocatalyst, TiO 2 , WO 3 , ZnO, SrTi
O 3 , BaTi 4 O 9 , RbPb 2 Nb 3 O 10 , ZrO
2 , metal sulfide, etc. are used. The hygroscopic agent preferably has a larger specific surface area in terms of effectively adsorbing moisture. Specifically, if it has a specific surface area of 10 m 2 / g or more, it is used as the moisture absorbent of the present invention. The photocatalyst also preferably has a specific surface area of 10 m 2 / g or more in consideration of the activating effect on the hygroscopic agent. It is also possible to use a photocatalyst having a small diameter and attach the photocatalyst to the surface of the hygroscopic agent.
【０００５】吸湿剤と光触媒との配合物は、吹付け，塗
装，電着等の適宜の形態で基体表面に塗布され、吸湿・
放湿機能を備えた皮膜となる。基材としては、従来建材
として知られている金属板，紙，合成樹脂板，パーティ
クルボード，石膏板，織布，不織布又はコンクリート板
等が使用される。吸湿剤及び光触媒の種類にもよるが、
通常、吸湿剤１重量部に対し光触媒０．３〜３重量部で
配合され、基材の表面に塗布される。光触媒の配合比率
が０．３重量部を下回ると、吸湿剤を賦活する作用が小
さくなる。他方、光触媒の配合比率が３重量部を超える
と、賦活作用は大きいものの、吸湿剤の割合が相対的に
小さく、必要な吸湿特性が得られない。皮膜は、常用の
塗膜形成剤を更に含むことができる。The mixture of the hygroscopic agent and the photocatalyst is applied to the surface of the substrate by an appropriate method such as spraying, painting, electrodeposition, etc.
It becomes a film with a moisture releasing function. As the base material, a metal plate, a paper, a synthetic resin plate, a particle board, a gypsum plate, a woven cloth, a non-woven cloth, a concrete board or the like which has been conventionally known as a building material is used. Depending on the type of hygroscopic agent and photocatalyst,
Usually, 0.3 to 3 parts by weight of the photocatalyst is mixed with 1 part by weight of the hygroscopic agent and applied on the surface of the base material. If the mixing ratio of the photocatalyst is less than 0.3 part by weight, the action of activating the hygroscopic agent becomes small. On the other hand, when the compounding ratio of the photocatalyst exceeds 3 parts by weight, the activating effect is large, but the ratio of the hygroscopic agent is relatively small, and the required hygroscopic property cannot be obtained. The film may further contain conventional film-forming agents.
【０００６】[0006]
【作用】約４００ｎｍ以下の波長を持つ光をＴｉＯ2 粉
末に照射すると、電子及び正孔がＴｉＯ2 粉末に生成す
る現象がある。電子は、空中酸素の還元反応に消費され
る。正孔は、表面にある水を酸素と水素に分解する作用
を呈する。このような作用は、ＴｉＯ2 粉末以外の他の
光触媒においても同様に得られる。本発明は、この光触
媒が呈する作用を吸湿剤の賦活に使用している。すなわ
ち、光触媒と配合された吸湿剤に付着している水分は、
光触媒による分解反応を受け、吸湿剤から放出される。
光触媒による分解反応は、光触媒に応じた波長、すなわ
ち半導体である光触媒のバンドギャップ以上のエネルギ
ーに相当する波長を持つ光を照射することにより開始す
る。そこで、一定量の水分が吸着されたとき又は定期的
に、たとえば高圧水銀灯からの出射光で建材表面を照射
することにより吸着水分を放出させる。これにより、吸
湿剤の保有水分が減少し、吸湿能が回復する。その結
果、吸湿剤の所期特性が長期間にわたって維持され、良
好な吸湿能を備えた建材となる。放湿に使用する光は、
たとえば光触媒がＴｉＯ2 であるとき４１３ｎｍより短
波長，ＷＯ3 では４５９ｎｍより短波長である。このよ
うな光源としては、高圧水銀灯，キセノンランプ，ハロ
ゲンランプ等が使用される。When the TiO 2 powder is irradiated with light having a wavelength of about 400 nm or less, electrons and holes are generated in the TiO 2 powder. The electrons are consumed in the reduction reaction of atmospheric oxygen. The holes serve to decompose water on the surface into oxygen and hydrogen. Such an effect can be similarly obtained in the photocatalyst other than the TiO 2 powder. The present invention uses the action exhibited by this photocatalyst to activate the hygroscopic agent. That is, the water adhering to the hygroscopic agent mixed with the photocatalyst is
It is decomposed by the photocatalyst and released from the hygroscopic agent.
The decomposition reaction by the photocatalyst is started by irradiating with light having a wavelength corresponding to the photocatalyst, that is, a wavelength corresponding to energy greater than the band gap of the photocatalyst which is a semiconductor. Therefore, when a certain amount of moisture is adsorbed or periodically, the adsorbed moisture is released by irradiating the surface of the building material with light emitted from a high-pressure mercury lamp, for example. As a result, the water content of the hygroscopic agent decreases, and the hygroscopic ability is restored. As a result, the desired properties of the hygroscopic agent are maintained for a long period of time, and a building material having a good hygroscopic ability is obtained. The light used to release moisture is
For example, when the photocatalyst is TiO 2 , the wavelength is shorter than 413 nm, and in WO 3 , the wavelength is shorter than 459 nm. As such a light source, a high pressure mercury lamp, a xenon lamp, a halogen lamp or the like is used.
【０００７】[0007]
実施例１：吸湿剤として平均粒径０．０２μｍ及び比表
面積８６．４ｍ2 ／ｇのγ−Ａｌ2 Ｏ3 粉末を、光触媒
として平均粒径０．０４μｍ及び比表面積４４．２ｍ2
／ｇのＴｉＯ2 粉末を使用した。重量比１：１の割合で
γ−Ａｌ2 Ｏ3 粉末とＴｉＯ2 粉末とを混合し、結合材
としてガラスフリット及び水ガラスを添加し、水を加え
てスラリーを調製した。乾燥膜厚が０．７ｍｍとなるよ
うにスラリーを板厚０．５ｍｍの鋼板表面に塗布し、５
５０℃に１０分加熱して焼き付けた。皮膜を形成した鋼
板から１０ｃｍ×１０ｃｍの試験片を切り出した。試験
片を１５０℃で加熱乾燥した後、温度２０℃及び相対湿
度３０％の乾燥雰囲気に２時間保持した。保持後の試験
片が安定した乾燥状態にあるものとして、その皮膜重量
を測定したところ３．２ｇであった。水分吸着 乾燥処理された試験片を温度３０℃及び相対湿度８０％
の恒温恒湿槽に入れ、定期的に試験片の重量を測定し
た。その結果、放置時間が経過するに従って、表１に示
すように試験片の重量が増加した。この重量増加は、湿
潤雰囲気中の水分が試験片の表面皮膜に吸着されたこと
に起因する。Example 1: γ-Al 2 O 3 powder having an average particle size of 0.02 μm and a specific surface area of 86.4 m 2 / g as a hygroscopic agent, an average particle size of 0.04 μm and a specific surface area of 44.2 m 2 as a photocatalyst.
/ G of TiO 2 powder was used. Γ-Al 2 O 3 powder and TiO 2 powder were mixed in a weight ratio of 1: 1 and glass frit and water glass were added as a binder, and water was added to prepare a slurry. The slurry was applied to the surface of a steel plate having a thickness of 0.5 mm so that the dry film thickness would be 0.7 mm.
It was heated at 50 ° C. for 10 minutes and baked. A 10 cm × 10 cm test piece was cut out from the steel sheet on which the film was formed. After heating and drying the test piece at 150 ° C., it was held in a dry atmosphere at a temperature of 20 ° C. and a relative humidity of 30% for 2 hours. Assuming that the test piece after holding was in a stable dry state, the weight of the film was measured and found to be 3.2 g. Test pieces that have been subjected to moisture adsorption drying treatment at a temperature of 30 ° C and relative humidity of 80%
The test piece was placed in a constant temperature and humidity chamber, and the weight of the test piece was periodically measured. As a result, the weight of the test piece increased as shown in Table 1 as the standing time passed. This increase in weight is due to the fact that the water in the wet atmosphere was adsorbed by the surface film of the test piece.
【０００８】[0008]
【表１】 [Table 1]
【０００９】吸着水分の放出 水分が吸着した試験片を、恒温恒湿槽から温度２０℃の
大気中に取り出した。試験片表面から１ｍ離れた位置に
４００ＫＷの高圧水銀灯を設置した。高圧水銀灯から波
長４００ｎｍの光を出射し、試験片の表面を照射した。
照射後の試験片を重量測定したところ、表２に示すよう
に重量が減少していた。この減少重量は、高圧水銀灯か
ら試験片に与えられる熱量が少量であることを考慮する
と、大半が光触媒で促進された吸着水分の酸化反応に起
因するものと推察される。 Release of Adsorbed Moisture A test piece on which moisture was adsorbed was taken out from the constant temperature and humidity chamber into the atmosphere at a temperature of 20 ° C. A 400 KW high-pressure mercury lamp was installed at a position 1 m away from the surface of the test piece. Light with a wavelength of 400 nm was emitted from a high pressure mercury lamp to irradiate the surface of the test piece.
When the test piece after irradiation was weighed, the weight was reduced as shown in Table 2. Considering that the amount of heat given to the test piece from the high-pressure mercury lamp is small, it is speculated that this reduced weight is mostly due to the oxidation reaction of the adsorbed moisture promoted by the photocatalyst.
【００１０】[0010]
【表２】 [Table 2]
【００１１】表２から明らかなように、水分吸着量にも
よるが、３０分以上の照射によって吸着水分のほとんど
が放出されていることが判る。水分放出後に試験片の皮
膜は、当初の重量と実質的に同じ３．２ｇとなってお
り、吸着能が回復された状態にあった。そのため、水分
吸着及び吸着水分の放出を繰り返し行っても、同様の特
性を呈した。以上のことから、γ−Ａｌ2 Ｏ3 及びＴｉ
Ｏ2 の皮膜を形成した鋼板は、吸湿・放湿機能を呈する
建材として使用できることが確認された。As is clear from Table 2, most of the adsorbed moisture is released by irradiation for 30 minutes or more, depending on the amount of adsorbed moisture. After the release of water, the coating of the test piece was 3.2 g, which was substantially the same as the initial weight, and the adsorption capacity was recovered. Therefore, even when moisture adsorption and adsorption moisture release were repeated, the same characteristics were exhibited. From the above, γ-Al 2 O 3 and Ti
It was confirmed that the steel sheet on which the O 2 film was formed could be used as a building material exhibiting a function of absorbing and releasing moisture.
【００１２】そこで、皮膜を形成した鋼板で内部空間が
５ｍ×５ｍ×５ｍの立方体状建屋を構築し、建屋の内部
に波長４００ｎｍの光を射出する光源を配置した。ま
た、外気が内部に侵入するように、建屋の壁面に１ｍ×
１ｍの開閉窓を設けた。窓を３時間ごとに１０分開放し
て空気の入れ替えを行うと共に、８時間ごとに２０分間
だけ光源をオンした。この条件下で、建屋内の相対湿度
を１０日間継続して測定した。測定中の気象状態は、測
定開始から最初の３日間が相対湿度８０％以上の曇り、
４日目が相対湿度６０％以下の晴れ，５日目が相対湿度
７０％以上の曇り時々晴れ，６日目から測定終了日まで
が連続して雨であった。特に、測定開始から７日目及び
８日目は、雨足がひどく、大半が相対湿度９５％以上と
極めて湿度の高い雰囲気であった。このような悪条件下
であっても、建屋内の相対湿度は、平均６０％に維持さ
れ、最も高い時でも６５〜７０％に過ぎなかった。Therefore, a cubical building having an internal space of 5 m × 5 m × 5 m was constructed from a steel sheet on which a film was formed, and a light source for emitting a light having a wavelength of 400 nm was arranged inside the building. In addition, 1m × on the wall of the building so that outside air can enter inside.
A 1m open / close window was provided. The window was opened every 3 hours for 10 minutes to replace the air, and the light source was turned on for 8 minutes every 8 hours. Under this condition, the relative humidity inside the building was continuously measured for 10 days. The meteorological condition during measurement is cloudy with relative humidity of 80% or more for the first 3 days from the start of measurement.
On the 4th day, it was fine with a relative humidity of 60% or less, on the 5th day it was cloudy with a relative humidity of 70% or more, and sometimes it was fine, and from the 6th day to the end of the measurement there was continuous rain. Particularly, on the 7th and 8th days from the start of measurement, the rainy feet were severe, and most of them were in an extremely humid atmosphere with a relative humidity of 95% or more. Even under such bad conditions, the relative humidity inside the building was maintained at 60% on average, and was only 65 to 70% at the highest.
【００１３】実施例２：吸湿剤及び光触媒の組合せを表
３に示すように代えて、電着塗装用のコンパウンドを調
製した。コンパウンドを板厚０．５ｍｍのステンレス鋼
板に施し、１５０℃で乾燥処理することにより乾燥膜厚
２００μｍの皮膜を形成した。このステンレス鋼板から
１０ｃｍ×１０ｃｍの試験片を切り出し、乾燥後に皮膜
重量Ｗ0 を測定した。実施例１と同じ条件下で８時間の
湿潤処理を試験片に施し、湿潤処理後の皮膜重量Ｗ1 を
求めた。また、湿潤処理された試験片に実施例１と同じ
条件下で１０分間の光照射によって水分を放出させた
後、皮膜重量Ｗ2を求めた。水分吸着及び水分放出に伴
った重量変化を、表３に併せ示す。Example 2 A compound for electrodeposition coating was prepared by changing the combination of the moisture absorbent and the photocatalyst as shown in Table 3. The compound was applied to a stainless steel plate having a plate thickness of 0.5 mm and dried at 150 ° C. to form a film having a dry film thickness of 200 μm. A test piece of 10 cm × 10 cm was cut out from this stainless steel plate, and the film weight W 0 was measured after drying. The test piece was subjected to a wet treatment for 8 hours under the same conditions as in Example 1, and the coating weight W 1 after the wet treatment was obtained. Further, after the moisture-treated test piece was exposed to light for 10 minutes under the same conditions as in Example 1 to release water, the coating weight W 2 was determined. Table 3 also shows changes in weight associated with water adsorption and water release.
【００１４】[0014]
【表３】 [Table 3]
【００１５】なお、以上の例においては、鋼板，ステン
レス鋼板等の金属板の上に吸湿・放湿皮膜を形成した。
しかし、本発明はこれに拘束されるものではなく、紙，
合成樹脂板，パーティクルボード，石膏板，織布，不織
布，コンクリート板等の他の基材に皮膜を形成した場合
にあっても、同様に光照射によって吸湿能が回復する皮
膜が形成された。また、吸湿剤及び光触媒からなる皮膜
は、吸湿・放湿ばかりでなく、雰囲気中の悪臭成分を吸
着することにも有効である。特にγ−Ａｌ2 Ｏ3 を吸湿
剤成分とする場合、悪臭の原因となる有機物も効果的に
吸着除去される。雰囲気から吸着された有機物は同様な
光照射により放出され、皮膜の所期特性が回復する。In the above example, the moisture absorbing / releasing film is formed on a metal plate such as a steel plate or a stainless steel plate.
However, the present invention is not limited to this, and paper,
Even when a film was formed on another substrate such as a synthetic resin plate, a particle board, a gypsum board, a woven cloth, a nonwoven cloth, and a concrete board, a film whose moisture absorption capacity was restored by light irradiation was similarly formed. Further, the film composed of the hygroscopic agent and the photocatalyst is effective not only for absorbing and releasing moisture but also for adsorbing a malodorous component in the atmosphere. In particular, when γ-Al 2 O 3 is used as a hygroscopic agent component, organic substances that cause an offensive odor are also effectively adsorbed and removed. Organic substances adsorbed from the atmosphere are released by similar light irradiation, and the desired properties of the film are restored.
【００１６】[0016]
【発明の効果】以上に説明したように、本発明において
は、吸湿剤と光触媒とを配合した皮膜を基体表面に形成
している。光触媒は、光照射時に吸湿剤から吸着水分を
放出させる反応を活発にし、吸湿剤の吸湿能を回復させ
る。そのため、湿潤雰囲気に皮膜がさらされた後、定期
的に光照射することによって吸着水分が放出され、皮膜
の吸湿能が回復する。したがって、本発明の建材は、光
照射の繰返しにより長期間にわたって良好な住環境を維
持する建材として有用な材料となる。As described above, in the present invention, the film containing the hygroscopic agent and the photocatalyst is formed on the surface of the substrate. The photocatalyst activates the reaction of releasing the adsorbed moisture from the hygroscopic agent during light irradiation, and restores the hygroscopic ability of the hygroscopic agent. Therefore, after the film is exposed to the humid atmosphere, the light is periodically irradiated to release the adsorbed moisture, and the hygroscopic ability of the film is restored. Therefore, the building material of the present invention is a useful material as a building material that maintains a favorable living environment for a long period of time by repeating light irradiation.
Claims (5)
の表面に形成されている建材。1. A building material in which a film containing a hygroscopic agent and a photocatalyst is formed on the surface of a base material.
シリカゲル，吸水性高分子から選ばれた１種又は２種以
上である請求項１記載の建材。2. The moisture absorbent is γ-Al 2 O 3 , zeolite,
The building material according to claim 1, which is one kind or two or more kinds selected from silica gel and a water-absorbing polymer.
ｒＴｉＯ3 ，ＢａＴｉ4 Ｏ9 ，ＲｂＰｂ2 Ｎｂ3 Ｏ10，
ＺｒＯ2 ，金属硫化物から選ばれた１種又は２種以上で
ある請求項１記載の建材。3. The photocatalyst is TiO 2 , WO 3 , ZnO, S.
rTiO 3 , BaTi 4 O 9 , RbPb 2 Nb 3 O 10 ,
The building material according to claim 1, which is one kind or two or more kinds selected from ZrO 2 and metal sulfides.
ィクルボード，石膏板，織布，不織布又はコンクリート
板である請求項１記載の建材。4. The building material according to claim 1, wherein the base material is a metal plate, paper, synthetic resin plate, particle board, gypsum board, woven cloth, non-woven cloth or concrete board.
重量部を配合した皮膜が基材の表面に形成されている請
求項１〜４の何れかに記載の建材。5. A photocatalyst of 0.3 to 3 with respect to 1 part by weight of a hygroscopic agent.
The building material according to any one of claims 1 to 4, wherein a coating containing parts by weight is formed on the surface of the base material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26253293A JP3334767B2 (en) | 1993-10-20 | 1993-10-20 | Building materials with moisture absorption and release functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26253293A JP3334767B2 (en) | 1993-10-20 | 1993-10-20 | Building materials with moisture absorption and release functions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07113272A true JPH07113272A (en) | 1995-05-02 |
| JP3334767B2 JP3334767B2 (en) | 2002-10-15 |
Family
ID=17377110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26253293A Expired - Fee Related JP3334767B2 (en) | 1993-10-20 | 1993-10-20 | Building materials with moisture absorption and release functions |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3334767B2 (en) |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0977574A (en) * | 1995-07-08 | 1997-03-25 | Toto Ltd | Concrete structure |
| EP0780158A1 (en) | 1995-12-21 | 1997-06-25 | Asahi Glass Company Ltd. | Photocatalyst composition and process for its production, and photocatalyst composition attached substrate |
| JPH09230810A (en) * | 1995-12-22 | 1997-09-05 | Toto Ltd | Outdoor display board and its cleaning method |
| JPH09313887A (en) * | 1996-05-28 | 1997-12-09 | Agency Of Ind Science & Technol | Photocatalyst sheet |
| WO1999051327A1 (en) * | 1998-04-02 | 1999-10-14 | Toto Ltd. | Humidity-controlling functional material and process for the production thereof |
| JPH11349327A (en) * | 1998-06-02 | 1999-12-21 | Kongo Co Ltd | Titanium oxide panel and interior |
| US6013372A (en) * | 1995-03-20 | 2000-01-11 | Toto, Ltd. | Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with superhydrophilic photocatalytic surface, and method of making thereof |
| US6090489A (en) * | 1995-12-22 | 2000-07-18 | Toto, Ltd. | Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface |
| US6165256A (en) * | 1996-07-19 | 2000-12-26 | Toto Ltd. | Photocatalytically hydrophilifiable coating composition |
| US6337129B1 (en) | 1997-06-02 | 2002-01-08 | Toto Ltd. | Antifouling member and antifouling coating composition |
| US6524664B1 (en) | 1996-03-21 | 2003-02-25 | Toto Ltd. | Photocatalytically hydrophilifying and hydrophobifying material |
| JP2003088572A (en) * | 2001-05-29 | 2003-03-25 | Fujita Corp | Deodorizing material and deodorizing method |
| US6830785B1 (en) | 1995-03-20 | 2004-12-14 | Toto Ltd. | Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with a superhydrophilic photocatalytic surface, and method of making thereof |
| JP2005186618A (en) * | 2003-12-04 | 2005-07-14 | Sk Kaken Co Ltd | Laminated body |
| JP2007031967A (en) * | 2005-07-22 | 2007-02-08 | Inax Corp | Building material and building structure |
| JP2012017578A (en) * | 2010-07-06 | 2012-01-26 | Bekku Kk | Structure |
| US9353270B2 (en) | 2011-06-17 | 2016-05-31 | Nippon Steel & Sumitomo Metal Corporation | Surface-treated metal and method for producing same |
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1993
- 1993-10-20 JP JP26253293A patent/JP3334767B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6830785B1 (en) | 1995-03-20 | 2004-12-14 | Toto Ltd. | Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with a superhydrophilic photocatalytic surface, and method of making thereof |
| US6013372A (en) * | 1995-03-20 | 2000-01-11 | Toto, Ltd. | Method for photocatalytically rendering a surface of a substrate superhydrophilic, a substrate with superhydrophilic photocatalytic surface, and method of making thereof |
| JPH0977574A (en) * | 1995-07-08 | 1997-03-25 | Toto Ltd | Concrete structure |
| EP0780158A1 (en) | 1995-12-21 | 1997-06-25 | Asahi Glass Company Ltd. | Photocatalyst composition and process for its production, and photocatalyst composition attached substrate |
| JPH09230810A (en) * | 1995-12-22 | 1997-09-05 | Toto Ltd | Outdoor display board and its cleaning method |
| US6090489A (en) * | 1995-12-22 | 2000-07-18 | Toto, Ltd. | Method for photocatalytically hydrophilifying surface and composite material with photocatalytically hydrophilifiable surface |
| US6524664B1 (en) | 1996-03-21 | 2003-02-25 | Toto Ltd. | Photocatalytically hydrophilifying and hydrophobifying material |
| JPH09313887A (en) * | 1996-05-28 | 1997-12-09 | Agency Of Ind Science & Technol | Photocatalyst sheet |
| US6165256A (en) * | 1996-07-19 | 2000-12-26 | Toto Ltd. | Photocatalytically hydrophilifiable coating composition |
| US6337129B1 (en) | 1997-06-02 | 2002-01-08 | Toto Ltd. | Antifouling member and antifouling coating composition |
| WO1999051327A1 (en) * | 1998-04-02 | 1999-10-14 | Toto Ltd. | Humidity-controlling functional material and process for the production thereof |
| JPH11349327A (en) * | 1998-06-02 | 1999-12-21 | Kongo Co Ltd | Titanium oxide panel and interior |
| JP2003088572A (en) * | 2001-05-29 | 2003-03-25 | Fujita Corp | Deodorizing material and deodorizing method |
| JP2005186618A (en) * | 2003-12-04 | 2005-07-14 | Sk Kaken Co Ltd | Laminated body |
| JP2007031967A (en) * | 2005-07-22 | 2007-02-08 | Inax Corp | Building material and building structure |
| JP2012017578A (en) * | 2010-07-06 | 2012-01-26 | Bekku Kk | Structure |
| US9353270B2 (en) | 2011-06-17 | 2016-05-31 | Nippon Steel & Sumitomo Metal Corporation | Surface-treated metal and method for producing same |
| GB2538268A (en) * | 2015-05-13 | 2016-11-16 | Rolls Royce Plc | Shell mould production |
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