JPH06200399A - Aluminum or aluminum alloy functional material - Google Patents

Abstract

PURPOSE:To make an aluminum panel and its material to be shaped as the building interior, exterior and decorative material, etc., to have functions such as a moisture-conditioning, perfuming, light-emitting function, etc., and to meet the needs for comfortableness in living space and for high quality materials. CONSTITUTION:An Aluminum functional material having a functional oxidized film can be produced by filling the pores 2 of the porous anodically oxidized film 1 formed on aluminum with the functional materials 3 such as a particulate moisture-conditioning, perfuming or light-emitting material, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a functional material of aluminum or an aluminum alloy (hereinafter collectively referred to as "aluminum"). The present invention relates to an aluminum functional material such as a panel or a profile filled with a functional substance such as a material.

[0002]

2. Description of the Related Art Conventionally, an electrolytic coloring method using a bath containing various metal salts, an immersion coloring method using a bath of an organic dye, etc.
Many methods for coloring aluminum anodic oxide coatings are known, and Japanese Patent Publication Nos. 52-5010 and 51.
JP-A-35177 describes a method in which aluminum is anodized in a phosphoric acid aqueous solution, and this is colored by dipping or further energizing in an aqueous organic pigment fine dispersion bath. However, these methods are aimed at the aesthetics and durability of building members and the like, and do not impart other functions.

On the other hand, in recent years, in living spaces and living environments, comfort or quality maintenance of products has been demanded, and also high value-added building members and decorative members have been demanded. From such a point of view, a method of internally holding a hygroscopic filler in a porous material is known as an indoor humidity control material. However, when this is used as an interior / interior panel, not only will the filler fall out during transportation and installation of the panel, but if a wet cloth or the like is used to wipe off the dirt, the dirty water once absorbed by the cloth may be removed. There was a drawback that it was inhaled, and on the contrary, it caused stains. In addition, there are some anti-condensation wallpapers and the like that have the anti-condensation function, but it was not possible to expect a great effect when they were applied as wallpaper material.

[0004]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide aluminum panels and shapes excellent in mechanical properties and chemical properties such as weather resistance and corrosion resistance and used for interior and exterior materials for construction and decoration materials. The material itself has functions such as humidity control, fragrance, and light emission to meet the needs for comfort in living spaces and high-quality materials.

[0005]

According to the present invention, in order to achieve the above-mentioned object, a fine particle humidity control material, an aroma material, a light emitting material, etc. are formed in the pores of a porous anodized film formed on aluminum. Provided is an aluminum functional material having a functional oxide film filled with a functional substance. The functional substance may be filled in the pores of the porous anodic oxide coating alone depending on its type, or may be mixed and filled in the clay of fine particles. In a preferred embodiment,
After filling the pores of the porous anodized film of aluminum with a functional substance, it is sealed or semi-sealed with steam or boiling water, or with fine particle clay, or a breathable film, paper, etc. Can also be attached.

[0006]

The function of the aluminum functional material of the present invention is that various pores of the porous anodic oxide coating of aluminum are filled with various functional substances to control the humidity and aroma of building interior and exterior materials and decoration materials. This is because it has functions such as light emission. That is, by filling the humidity control material as a functional substance,
When it absorbs and releases moisture in the air and is used as an indoor building member or a wall panel, it exerts a function of adjusting the humidity in the room. Further, by using the same treated aluminum sash for the indoor side member of the aluminum sash window, it is possible to prevent dew condensation on the aluminum sash. On the other hand, by filling the fragrance material, not only can the fragrance be released into the air but also the odor of the cigarette in the room can be eliminated, and the deodorant fragrance action is exhibited.
Further, by filling the light emitting material, various colors can be emitted by natural light and artificial light, and the design and decorative value can be greatly improved. By filling the functional substance with a sealing or semi-sealing treatment or attaching a breathable film or paper, the filled functional substance can be removed without increasing the durability.

[0007]

Embodiments of the present invention include intercalation compounds such as kaolinite clay and montmorillonite clay as the humidity control material. Further, a small amount of an organic water retention agent, for example, a natural product such as tragacanth gum, or a synthetic polymer such as polyvinyl alcohol, polyvinyl butyral, polyethylene glycol, methyl cellulose, carboxymethyl cellulose or hydroxypropyl cellulose is hydrogenated and kneaded to form a clay. It is also possible to use a qualitative alumina clay having a water retaining function. On the other hand, as the aromatic material, a general carbocyclic compound having a benzene nucleus can be used. As the light-emitting material, zinc or alkaline earth sulfide, which is a typical phosphor, can be given, and fluorescent substances such as fluorescein and fluorene can also be used.

Since the above-mentioned functional substance is used to fill the fine pores of the aluminum porous anodic oxide film, the average particle size thereof is preferably adjusted to 50 to 700 nm. In addition, regarding the miniaturization and dispersion of a functional substance having a large average particle diameter, an anionic polymer surfactant as a dispersant, for example, a formalin condensate of naphthalene sulfonic acid, a polystyrene sulfonate, a polyacrylic acid is used. An appropriate method such as a method of obtaining a stable and fine water dispersion by dispersing with a sand mill using salt or the like can be adopted. For a functional substance that dissolves in concentrated acid, a method of once dissolving it in concentrated acid and adding it to water to precipitate it as finer particles can be used together. By such a method, a stable dispersion liquid having a particle diameter of preferably 50 to 700 nm is prepared.

As the aluminum anodic oxide coating to be filled with the functional substance, the pore diameter of the porous anodic oxide coating formed by the usual anodic oxidation treatment is generally about 50 n.
Since it is m or less and it is difficult to fill most of the functional substances, it is necessary to use aluminum having a porous anodic oxide coating with a large pore size. Various methods are known as a method for forming such a porous anodized film having a large pore size, but first, in one method, aluminum is treated with, for example, sulfuric acid, phosphoric acid, oxalic acid, malonic acid, One or two of mineral acids such as maleic acid and / or organic acids
In an aqueous acid solution of one or more kinds, for example, phosphoric acid 5 to 30 W / V%,
Anodization is carried out at a high voltage in an electrolytic bath containing 3 to 40 W / V% of oxalic acid to form a porous anodized film having a larger pore size than usual on the surface of the aluminum. Generally DC
When anodizing at a high voltage of 150 V to 220 V, an anodized film having a pore size of 120 nm or more is usually obtained, so that most of the functional substance can be deposited and filled in the pores. That is, when the anodizing voltage is less than 150V, it is not preferable because it is difficult to obtain pores of a size large enough to deposit and fill the functional substance. It is not preferable because it has an adverse effect.

As another method, aluminum is first anodized in an aqueous acid solution of one or more of the mineral acids and / or organic acids to form a porous anodized film on the surface of the aluminum. Let The electrolysis condition is 35 V
Above, preferably by high voltage electrolysis of 50 ~ 160V,
An anodic oxide film having a large cell size and a large pore size is obtained. Then, an aqueous acid solution of one or more of phosphoric acid, sulfuric acid, oxalic acid, and sulfamic acid, preferably phosphoric acid 3 to 10 W / V
% Aqueous solution to expand the pores of the film. A porous anodized film suitable for filling with the functional substance of the present invention, which is finally adjusted to have a pore size of 50 nm or more, preferably 100 to 1000 nm, and a pore depth of about 3 to 10 μm by such a method. To get Further, in order to shorten the time for the treatment of enlarging the pores of the coating, the treatment of dipping and alternating current electrolysis is alternately repeated at a short time interval in an aqueous solution of phosphoric acid of 3 to 10 W / V% to obtain the coating thin film. The hole enlargement process can be performed in a relatively short time.

As a method for filling the fine particles of the functional substance into the pores of the aluminum porous anodic oxide film, an electrophoresis method in a dispersion liquid of the fine particles can be preferably used. For example, 10 to 30% of the functional substance particles are dispersed in an aqueous solution by creating polarity on the surface of the functional substance particles (eg, adsorbing a surfactant on the surface of the particles) to prepare an aqueous dispersion bath. In this bath, an electrophoretic method in which direct current electrolysis (voltage of 30 to 200 V) is performed using an aluminum porous body as an anode and the functional substance particles are filled in the pores of the anodized film can be adopted. As the electrophoresis method, a DC voltage scanning method of scanning a DC voltage from a low voltage to a high voltage at a constant boosting speed for a predetermined time, a DC constant voltage method of electrolyzing at a constant voltage for a predetermined time, and the like can be adopted.

By the method as described above, as shown in FIG. 1, the aluminum anodic oxide film in which the fine particles 3 of the functional substance are filled in the pores 2 of the anodic oxide film 1 is made of the filled functional substance. In order to prevent the fine particles from separating, if necessary, as shown in FIG. 2, steam or hot water may be used for semi-sealing (or sealing) treatment, or as shown in FIG. 3, clay of fine particles may be used. 4, it is also possible to perform a sealing (or semi-sealing) treatment, or as shown in FIG. 4, a breathable film or paper 5 or the like can be attached. Further, depending on the functional substance used, for example, in the case of a light emitting material, it is possible to apply a non-breathable transparent coating film.

[0013]

EXAMPLES The present invention will be described more specifically below with reference to examples and application examples.

Example 1 (in the case of an indoor wall panel) 3 containing 20 W / V% phosphoric acid and 5 W / V% oxalic acid
DC 200 with aluminum as anode in electrolysis bath at 0 ℃
V is applied to perform anodizing treatment, and the pore size is about 250 nm,
An anodized film having pores with a depth of about 5 μm is formed. Then, by filling the pores of the anodic oxide film with kaolinite having an average particle diameter of 0.2 μm as a filling humidity control material by an electrophoretic method, and attaching a breathable wallpaper on the surface to prevent the separation thereof. A comparison of changes in indoor humidity under the conditions shown in Table 1 below was performed simply on the aluminum plate with the wallpaper. The indoor humidity was 65% when the wallpaper was only on the aluminum plate, but the same conditions were used. When the above invention product is used, the indoor humidity becomes 54%,
The indoor environment has been greatly improved.

[Table 1]

Application Example 1 (when used as a hot air heater or air conditioner blowout louver material) Since the air blown out from the hot air heater is hot hot air, its relative humidity is low, and furniture, pianos, etc. that receive this hot air directly Wood products are dry and go crazy. Moreover, when it directly contacts the human skin, it causes skin dryness, which is not preferable for health. Therefore, if the above humidity control material is used for the wind direction blades (louver material) of the blowout port, the louver absorbs moisture when the room temperature when the warm air is stopped drops, and the louver is heated by the warm air when the warm air machine is operating. It is possible to use humidified hot air by releasing the moisture from the above, and the problem due to the above-mentioned drying can be solved.

Application example 2 (moisture absorbing / releasing fusuma) In addition to using the panel as a wall panel, it is also used as a sliding door to be used as a fitting having a moisture absorbing / releasing function.

Application Example 3 (Indirect Illumination Reflecting Plate) An aluminum panel having a luminescent material filled in the pores of a porous anodic oxide film is used for ceilings, floors, study windows, etc. and is used as indirect illumination to obtain a color rendering effect. can get.

[0018]

INDUSTRIAL APPLICABILITY As described above, the aluminum functional material of the present invention is not only used as a building member such as a panel or a profile, but is filled with a functional substance to control humidity, aroma, light emission and the like. By having functions, it becomes possible to use them according to these functions, add high added value, and expand their applications. In addition, since the functional substance is deposited and filled deep in the pores of the anodic oxide film, it does not fall off, and its functionality is not impaired when dust or dirt on the surface is cleaned.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing a state in which fine particles of a functional substance are filled in the pores of an anodized aluminum film.

FIG. 2 is a schematic cross-sectional view showing a state where the aluminum anodic oxide coating shown in FIG. 1 is semi-sealed.

FIG. 3 is a schematic enlarged cross-sectional view showing a state in which the aluminum anodic oxide coating shown in FIG. 1 is sealed with clay.

FIG. 4 is a schematic cross-sectional view showing a state in which a breathable film or paper is attached to the surface of the aluminum anodized film shown in FIG.

[Explanation of symbols]

1 anodized film, 2 pores, 3 fine particles of functional substance, 4 clay, 5 breathable film or paper

Claims (1)

[Claims] 1. An aluminum having a functional oxide film formed by filling fine particles of a functional substance (3) into pores (2) of a porous anodized film (1) formed on aluminum or an aluminum alloy, or Aluminum alloy functional material.