JP2007182686A - Building material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building material which can be constituted in such a manner as to recover CO<SB>2</SB>absorbing power, even if a CO<SB>2</SB>absorbent absorbs a large amount of CO<SB>2</SB>. <P>SOLUTION: A tile 1 comprises a ceramic tile body 2 as a building material body, and the CO<SB>2</SB>absorbent 3 which consists of Ba<SB>2</SB>TiO<SB>4</SB>formed on one plate surface of the tile body 2. The CO<SB>2</SB>absorbent 3 is sintered integrally with the tile body 2. A dovetail groove 2a is provided on the backside of the tile body 2. Construction can be performed by hooking a wall surface of the tile 1 on a tile locking part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a building material, and more particularly to a building material having a CO ₂ absorption function.

As a building material having a CO ₂ absorption function, Japanese Patent Application Laid-Open No. 11-27895 describes a porous building material containing a cement paste granular molded body. Japanese Unexamined Patent Application Publication No. 2003-53144 describes a wall material containing shell powder as a CO ₂ absorbent.
JP-A-11-27895 JP 2003-53144 A

Building materials of the JP-A 11-278954 Patent and Patent 2003-53144 discloses, after CO ₂ absorbent had absorbed the CO ₂ to the saturation amount is having no CO ₂ absorption capacity.

The present invention aims to provide a building material capable of CO ₂ absorber is configured to restore the CO ₂ absorption capacity even when a large amount of absorbed CO _2.

The building material according to claim 1 is a building material having a CO ₂ absorbent, wherein at least a part of the CO ₂ absorbent is Ba ₂ TiO ₄ .

The building material according to claim 2 is the building material according to claim 1, wherein the building material has a plate-shaped building material main body and the CO ₂ absorbent provided at least on the front surface of the building material main body. Is.

The building material according to claim 3 is the building material according to claim 1, wherein the building material has a building material main body having a hollow portion communicating with the outside, and the CO ₂ absorbent accommodated in the hollow portion. It is what.

The building material of claim 4 has a building material main body having a hollow part communicating with the outside, and a CO ₂ absorbent accommodated in the hollow part.

The building materials according to claims 1 to 3 use Ba ₂ TiO ₄ as at least a part of the CO ₂ absorbent. This Ba ₂ TiO ₄ is remarkably excellent in CO ₂ absorption capacity as compared with shell powder and the like. Moreover, the Ba ₂ TiO _4, even after a large amount of absorbed CO _2, because it has the property of releasing CO ₂ by heating, the building material or building if the building material has a large amount of absorbed CO ₂ It is possible to recover the CO ₂ absorption capacity by heating Ba ₂ TiO ₄ taken out of the material.

The Ba ₂ TiO ₄ absorbs CO ₂ in accordance with the reaction Ba ₂ TiO ₄ + CO ₂ → BaTiO ₃ + BaCO ₃ . When CO ₂ absorbed is heated to 800 ° C. or higher, a reaction in the reverse direction proceeds to release CO ₂ .

The building material of claim 2 is used so that the front surface is exposed to the atmosphere, such as a wall material. Since the CO ₂ absorbent is provided on the front surface of the building material, it is possible to efficiently absorb CO ₂ in the atmosphere.

The building material of claim 3 is used so that air flows through the hollow portion. The CO ₂ absorbent in the hollow part absorbs CO ₂ . In this case, the CO ₂ absorbent is preferably accommodated in the hollow part as particles and / or powders. Thus, after the CO ₂ absorbent has absorbed a large amount of CO ₂ is removed CO ₂ absorbent from the hollow portion, heating to play (CO ₂ release) and re housing or, or brand new The CO ₂ absorbent absorption capacity of the building material can be recovered by exchanging it with the CO ₂ absorbent.

In addition, in Claims 2 and 3, when the building material main body has heat resistance (preferably heat resistance of 800 ° C. or higher), the building material having Ba ₂ TiO ₄ as the CO ₂ absorbent is Ba. it is also possible to be heated with ₂ TiO ₄ from _Ba 2 TiO ₄ to release CO _2.

The building material of claim 4 has the same configuration as the building material of claim 3 except that the CO ₂ absorbent is not limited to a specific material such as Ba ₂ TiO ₄ . Also in this case, the CO ₂ absorbent is preferably accommodated in the hollow part in the form of particles and / or powder. Thus, after the CO ₂ absorbent has absorbed a large amount of CO ₂ can be recovered CO ₂ absorption capacity by to exchange CO ₂ absorbent. In addition, when the CO ₂ absorbent has a characteristic of releasing CO ₂ by heating, the CO ₂ absorbent may be regenerated by heating. In this case, when the building material body is one having heat resistance, it is also possible to heat the building material containing a CO ₂ absorbent to play CO ₂ absorbent.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a perspective view of a tile as a building material according to an embodiment.

The tile 1 includes a ceramic tile body 2 as a building material body and a CO ₂ absorbent 3 made of Ba ₂ TiO ₄ formed on one plate surface of the tile body 2. The CO ₂ absorbent 3 is integrally sintered with the tile body 2. A small amount of a binder component (for example, clay or glass frit) may be added to promote the sintering of Ba ₂ TiO ₄ .

  A dovetail groove 2a is provided on the back surface of the tile body 2, and the tile 1 can be constructed so as to be hooked on a tile locking portion (not shown) on the wall surface.

The tile 1 is constructed so that the front surface is exposed to the atmosphere. Since the CO ₂ absorbent 3 is provided on the front surface of the tile 1, it is possible to efficiently absorb CO ₂ in the atmosphere.

This tile 1 has a CO ₂ absorbent 3 made of Ba ₂ TiO ₄ and is remarkably excellent in CO ₂ absorption capacity. Further, by CO ₂ absorbent 3 is heated by removing the tiles 1 from the wall surface when a large amount absorbed CO _2, it is possible to recover the CO ₂ absorption capacity of CO ₂ absorber 3.

  FIG. 2 shows a block as a building material according to another embodiment, in which FIG. 2 (a) is a perspective view, and FIG. 2 (b) is a sectional view taken along line BB in FIG. 2 (a).

The block 5 includes a hollow rectangular parallelepiped ceramic block body 6 having a rear surface opened as a building material body, a granular CO ₂ absorbent 7 made of Ba ₂ TiO ₄ accommodated in the block body 6, and a block A mesh 8 is preferably attached to the rear surface of the main body 6 in an attachable / detachable manner with an adhesive or a fixture (not shown). A vent hole 6a is provided on the front surface of the block main body 6, and the mesh 9 is disposed so as to overlap the vent hole 6a in order to prevent the granular CO ₂ absorbent 7 from dropping off from the vent hole 6a. .

  The blocks 5 are stacked and constructed so as to construct a block fence. At this time, the front and rear surfaces are stacked so that they are vertical surfaces.

When wind hits the block soot, air flows through the block 6 so as to pass through the vent 6 a, and CO _{2 in} the air is absorbed by the CO ₂ absorbent 7.

When the mesh 8 is detachably attached to the block body 6, when the CO ₂ absorbent 7 absorbs a large amount of CO ₂ , the mesh 8 is removed, the CO ₂ absorbent 7 is taken out, heated and regenerated. It can be refilled afterwards or replaced with a new CO ₂ absorbent.

  FIG. 3 shows a hollow building material as a building material according to another embodiment, wherein (a) is a perspective view and (b) is a cross-sectional view taken along line BB in FIG. is there.

The hollow building material 10 includes a hollow cylindrical ceramic hollow building material main body 11, a granular CO ₂ absorbent 12 made of Ba ₂ TiO ₄ accommodated in the hollow building material main body 11, and a hollow building material main body. 11 and a breathable cap 13 attached to both ends. As the breathable cap 13, a mesh, a rubber or resin stopper with a vent hole, or the like can be used. In addition, although the hollow building material main body 11 is illustrated in a cylindrical shape, it may be a rectangular tube shape and its cross-sectional shape is arbitrary.

  The hollow building material 10 is constructed so that both end surfaces are exposed to the atmosphere so that air flows through the hollow portion. This hollow building material 10 can be used as a louver, for example.

When air flows through the hollow building material 10, the CO ₂ absorbent 12 absorbs CO ₂ .

After the CO ₂ absorbent 12 absorbs a large amount of CO ₂ , the CO ₂ absorbent 12 is taken out from the hollow building material body 11 and heated to regenerate (CO ₂ release) and re-contain or The CO ₂ absorbent absorption capacity of the building material can be recovered by exchanging it with the CO ₂ absorbent. Since the hollow building material body 11 is made of ceramic and has sufficient heat resistance, the hollow building material 10 is removed from the building, the cap 13 is removed as necessary, and then the entire hollow building material 10 is heated. It is also possible to regenerate the CO ₂ absorbent 12.

The above embodiment is an example of the present invention, and the present invention can be applied to various building materials other than those illustrated. In the present invention, the building material may be a coating material applied to a wall surface or the like. As the coating material, it is possible to use a mixture of Ba ₂ TiO ₄ powder, preferably about 1 to 20% by weight, particularly preferably about 2 to 15% by weight, based on the solid content of the paint. The paint may be organic, inorganic, or organic / inorganic hybrid. In the case of an organic or organic / inorganic hybrid paint, silica gel is preferably added in an amount of about 5 to 30% by weight, particularly preferably about 10 to 25% by weight, based on the solid content of the paint, to improve the air permeability of the coating film.

In the above embodiment CO ₂ absorber is made of only _Ba 2 TiO _4, but may also consist of a Ba 2 TiO ₄ and other CO ₂ absorbent. In the embodiment of FIGS. 2 and 3, the CO ₂ absorbent may not be Ba ₂ TiO _{4 as} long as it can be regenerated.

The CO ₂ that is released at the time of reproduction of the CO ₂ absorbent may be absorbed into the plant or the like.

Examples 1-3, Comparative Example 1
Using raw materials such as acrylic emulsion, filler (poisonous powder), pulp, white pigment (titanium oxide), additives (anti-mold agent, thickener, etc.), water, Ba ₂ TiO ₄ , and silica gel powder, formulated at the ratio shown in Table 1, it was applied at a rate of 1400 g / ^{m 2} as solids on the wall (15 m ²⁾ room sealed volume 24m ^3. After the paint was cured, the coating film was evaluated by comparing the indoor CO ₂ concentration after 6 men and women in their 20s to 50s chatted for about 3 hours, and the results are shown in Table 1.

The criteria for evaluation in Table 1 are as follows.
Excellent: CO ₂ concentration 1000 ppm or less Good: CO ₂ concentration 1000-2000 ppm
Impossible: CO ₂ concentration 2000ppm or more

  As shown in Table 1, Examples 1 to 3 are all excellent or good, but a comparative example is not possible.

It is a perspective view of the tile as a building material which concerns on embodiment. The block as a building material which concerns on another embodiment is shown, (a) A figure is a perspective view, (b) A figure is the BB sectional drawing of (a) figure. The hollow building material as a building material which concerns on another embodiment is shown, (a) A figure is a perspective view, (b) A figure is the BB sectional drawing of (a) figure.

Explanation of symbols

1 Tile 3, 7, 12 CO ₂ absorbent 5 Block 10 Hollow building material

Claims (4)

In building materials with CO ₂ absorbents,
A building material, wherein at least a part of the CO ₂ absorbent is Ba ₂ TiO ₄ . The building material according to claim 1, wherein the building material includes a plate-shaped building material main body and the CO ₂ absorbent provided on at least a front surface of the building material main body. The building material according to claim 1, wherein the building material includes a building material main body having a hollow portion communicating with the outside, and the CO ₂ absorbent accommodated in the hollow portion. A building material having a building material main body having a hollow portion communicating with the outside, and a CO ₂ absorbent accommodated in the hollow portion.

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