JP2006056912A - Vitamin functional material and method for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vitamin functional material suppressing oxidation deterioration causing lowering of freshness of perishables, contributing to the retention of the freshness by installing as an attachment member in a cabinet of a refrigerator and expectable of environmental improving effects such as antioxidizing actions or moisture retention effects in a room with release of vitamin air by use thereof as a blow-off port filter of an air conditioner, an air cleaner, a humidifier, etc., and to provide a method for producing the same. <P>SOLUTION: The vitamin functional material is composed by applying and holding vitamins in a ceramic porous structure 1 forming ventilating holes 2 with a binder of an inorganic or an organic compound. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vitamin functional material in which a porous substrate is impregnated with vitamins, and a method for producing the same, and more specifically, vegetables, fruits, meat, fish and the like in a refrigerator for personal use or business use. The present invention relates to a vitamin functional material that can be installed as an attachment member for maintaining the freshness of fresh food products and can be used as a blowout filter for an air conditioner, an air purifier, a humidifier, and the like, and a method for producing the same.

  Traditionally, functional vitamins such as vitamin C have been included in health supplements and pharmaceuticals as well as cosmetics and clothing, etc., such as taking health supplements, taking pharmaceuticals, applying cosmetics, or wearing clothing. It was a method of use that was absorbed directly into the human body.

  For example, as a raw material of vitamin C, L-ascorbic acid and its derivative L-ascorbic acid magnesium phosphate are used. These vitamin raw materials include talc, sericite, bentonite, titanium oxide, kaolin and the like. It is manufactured as cosmetics by mixing with clay-based inorganic compounds, organic alcohols such as higher alcohols such as glycerin and polyvinyl alcohol, or it is manufactured as health supplements and pharmaceuticals by mixing with polysaccharides such as methylcellulose and dextrin.

  In order to maintain the freshness mainly in the vegetable compartment of the refrigerator, a method of maintaining the freshness of vegetables etc. by generating negative ions is used, and for deodorization in the refrigerator, activated carbon, palladium, manganese, iron A technique for suppressing ethylene, methyl mercaptan, trimethylamine, and the like using a deodorant mainly composed of a metal such as catechin, wasabi, rosemary, and other natural materials.

  Furthermore, in air conditioners, air purifiers, humidifiers, etc., as means for improving the indoor environment, negative ions are generated, micro mist is released, corona discharge, ultrasonic humidifiers, etc. are used. Or using deodorants such as activated carbon, catechin, and wasabi.

As a related technique using such vitamins and vitamin derivatives, for example, JP 2004-51521 A (Patent Document 1) discloses an invention relating to “cosmetics containing a dry cosmetic ingredient in a nonwoven fabric”. The cosmetic component to be contained is one or more selected from collagen, collagen derivatives, hyaluronate, vitamins, vitamin derivatives and glycyrrhizinate, contains a thickener as a cosmetic component, and the nonwoven fabric contains silk. It is disclosed that it is a needle punched rayon nonwoven fabric.
JP 2004-51521 A

  By the way, when vitamin C is used alone in the fields of health supplements, pharmaceuticals, cosmetics, etc., the effect is not sustained and only one effect can be expected. In addition, ascorbic acid derivatives used in cosmetics, etc., magnesium salts and sodium salts that have become phosphoric esters are typically used, but even when used in such a state, long-term stability is several months. I can only expect it.

  The existing vitamin C material is easily soluble in water and has a characteristic of being weak against heat. For example, when it is used for a blower outlet filter of a humidifier, vitamin C is decomposed by heat or immediately by steam. Long-term use cannot be expected due to melting.

  The cosmetic containing dry cosmetic ingredients in the nonwoven fabric described in Patent Document 1 is excellent in stability over time and heat stability, but only an effect limited to cosmetics can be expected until tired.

  Therefore, the present invention has been made in view of the above circumstances, and its purpose is to suppress oxidative degradation that causes a reduction in freshness of fresh food products when installed as an attachment member in a refrigerator. It can contribute to the maintenance of freshness, and when used as a blowout filter for air conditioners, air purifiers, humidifiers, etc., releases vitamin air to improve the environment, such as indoor antioxidant and moisturizing effects. It is an object of the present invention to provide a functional vitamin material that can be expected to be produced and a method for producing the same.

  The present invention has been proposed in order to achieve the above-mentioned object, and the present invention according to claim 1 is characterized in that vitamins are adhered and held on a porous substrate by an inorganic or organic compound binder. It is a functional vitamin material.

  The vitamin functional material according to claim 1, wherein the vitamin includes not only a vitamin but also a vitamin derivative.

  The vitamin function according to claim 1 or 2, wherein the inorganic compound binder is selected from one or more of silicates and phosphates. Material.

  According to a fourth aspect of the present invention, the organic compound binder is selected from one or more of celluloses, polyvinyl alcohol, and emulsions. Is a vitamin functional material.

  According to a fifth aspect of the present invention, one or more types of metal ions or metal oxides are dispersed in the vitamins adhered to and held on the porous substrate. Item 5. The vitamin functional material according to Item 4.

  6. The vitamin functionality according to any one of claims 1 to 5, wherein the porous substrate is molded as a porous structure having a plurality of vent holes. Material.

  According to the seventh aspect of the present invention, the porous base material is dipped in a mixed aqueous solution in which an inorganic or organic compound is added to vitamins, dried, and then fired, so that the porous base material is impregnated and held with vitamins. This is a method for producing a vitamin functional material.

  The present invention according to claim 8 is the method for producing a vitamin functional material according to claim 7, wherein the vitamins include vitamin derivatives as well as vitamin simple substances.

  9. The vitamin function according to claim 7 or 8, wherein the inorganic compound is selected from one or more of silicates and phosphates. It is a manufacturing method of material.

  According to a tenth aspect of the present invention, the organic compound is selected from one or more of celluloses, polyvinyl alcohol, and emulsions. It is a manufacturing method of a vitamin functional material.

  According to the eleventh aspect of the present invention, after the porous substrate is immersed in the mixed aqueous solution, it is immersed in a solution in which one or more kinds of metal ions or metal oxides are mixed and dispersed, and then dried. The method for producing a vitamin functional material according to any one of claims 7 to 10, wherein firing is performed after the heating.

  The vitamin function according to any one of claims 7 to 11, wherein the porous base material is molded as a porous structure having a plurality of air holes. It is a manufacturing method of material.

According to the present invention, the following excellent effects can be obtained.
That is, according to the first and seventh aspects of the invention, the vitamin content can be increased by retaining vitamins on a porous substrate having a large number of micropores and a large surface area. In addition, since the vitamins are held using a binder of an inorganic or organic compound, the efficacy can be maintained for a long time.

  According to invention of Claim 2 and Claim 8, stability of vitamins is securable by including a vitamin derivative other than a vitamin simple substance as vitamins.

  According to invention of Claim 3 and Claim 9, it has a retention power of vitamins by using as an inorganic compound what was chosen from one type or two or more types in silicates and phosphates. It can function as an inorganic compound binder and can maintain the efficacy of the vitamin component in the long term.

  According to invention of Claim 4 and Claim 10, as an organic compound, retention of vitamins is achieved by using one selected from celluloses, polyvinyl alcohol, and emulsions. It can function as a powerful organic compound binder and can maintain the efficacy of the vitamin component for a long period of time.

  According to the invention described in claim 5 and claim 11, since metal ions or metal oxides are dispersed in the vitamins impregnated and held in the porous base material, the elution rate or elution amount of the vitamin component is controlled. It can be controlled, and can further impart an antifungal effect to vitamins.

  According to invention of Claim 6 and Claim 12, since the porous base material is shape | molded as the porous structure which has several ventilation holes, it is as an outlet filter, such as an air conditioner, an air cleaner, and a humidifier. Can be used.

Hereinafter, the best mode for carrying out the present invention will be described.
The vitamin functional material according to the present invention is obtained by impregnating and holding vitamins with a binder of an inorganic or organic compound on a porous substrate. Each component will be described below.

(Porous substrate)
As the porous base material, ceramic materials, natural fiber materials, synthetic fiber materials, pulp materials and the like processed into desired sizes and shapes can be used, and other porous materials having water absorption characteristics can be used. That's fine. These porous materials are used as the base material for impregnating vitamins because the porous material has a large number of micropores, so the surface area is large, and it is possible to impregnate vitamins not only in the surface but also in the micropores. This is because the content of vitamins can be increased.

  Ceramic materials include single oxides such as silica, alumina, magnesia, titania, zirconia, or zeolite, bentonite, sepiolite, attapulgite, sillimanite, kaolin, sericite, diatomaceous earth, feldspar, brackish clay, pearlite, vermiculite, Examples include secondary processed products such as particles of silicate compounds such as sericite and plate materials. Examples of the natural fiber material include fibers such as pulp fiber, cotton, wool fiber and hemp fiber, woven fabric, and non-woven fabric. Furthermore, examples of the synthetic fiber material include nylon, rayon, urethane (including polyurethane), acrylic, polyester, polypropylene, and other fibers, woven fabric, and non-woven fabric.

When used as an outlet filter for an air conditioner, an air cleaner, a humidifier, or the like, the porous substrate may be molded in advance as a porous structure having a plurality of ventilation holes. Typical examples of the shape of the porous structure include a honeycomb structure and a corrugated structure.
Moreover, when using it as an attachment member installed in the store | warehouse | chamber of a refrigerator, what was processed into the pipe shape, the sheet shape, the pleat shape etc. is mentioned, However, it is not restricted to this.

(Vitamins)
The raw materials for vitamins include vitamin derivatives as auxiliary materials for ensuring the stability of vitamins, in addition to vitamins such as vitamin C.
Examples of the vitamin C raw material include L-ascorbic acid, and examples of the auxiliary raw material include water-soluble L-ascorbic acid derivative phosphoric acid, polyphosphoric acid ester, and the ester metal salt. These metal salts include magnesium, sodium, potassium, calcium, aluminum, iron and the like.

  Functionality of the vitamin functional material can be given a function having at least one kind of property from antioxidant, antibacterial, deodorizing, moisturizing and aromatherapy properties. In addition to C, vitamin D, vitamin E, and the like, and vitamin-based raw materials include green tea or green tea catechin, salmon catechin, stevia, and the like.

(Inorganic or organic compound binder)
In order to maintain the efficacy of vitamins impregnated in the porous base material for a long period of time, an inorganic or organic compound is mixed with the vitamin raw material to have a vitamin holding ability but function as a binder.
Examples of the inorganic compound include lithium silicate, potassium silicate, sodium silicate, zirconium silicate, calcium silicate, aluminum silicate, ethyl silicate, silica sol, organosilicate, and other silicates, or phosphoric acid, polyphosphoric acid, ultrapolyphosphoric acid, aluminum phosphate, One selected from one or more of phosphates such as calcium phosphate and magnesium phosphate is used.

  As the organic compound, for example, one selected from one or more of methyl cellulose, carboxymethyl cellulose, polyvinyl alcohol, urethane emulsion, acrylic emulsion, vinyl acetate emulsion and the like is used.

  For example, a porous substrate is immersed in an aqueous solution in which a desired amount of vitamin raw material and vitamin derivative raw material and a desired amount of an inorganic or organic compound are mixed and dried for about 1 hour, and then fired at a predetermined temperature to be porous. Impregnate and hold vitamins in the base material.

(Metal ion or metal oxide)
In an environment where vitamins are fixed to a porous material with a binder of an inorganic or organic compound and used in water, humidified, or in contact with an excessive amount of water, vitamins impregnated and retained in a porous substrate It is preferable to disperse metal ions or metal oxides.

For example, after immersing the porous base material in the above mixed aqueous solution for about 1 hour, the porous base material is immersed in a solution in which one or more kinds of metal ions or metal oxides are mixed and dispersed in ethyl alcohol for several seconds and dried. And then baking at a predetermined temperature to disperse the metal ions or metal oxides in the vitamins impregnated and retained in the porous substrate, and the chemical reaction of the metal ions or metal oxides causes the vitamin component It is possible to control the elution rate or the amount of elution, and to impart an antifungal effect to vitamins.
Examples of metals that can be used for such applications include copper, silver, zinc, iron, magnesium, and platinum.

  In the above description, the porous base material is immersed in an aqueous solution in which the vitamin raw material and vitamin derivative and an inorganic or organic compound are mixed and dissolved, and the surface of the porous base material and the micropores are impregnated with vitamins. However, the method of attaching vitamins to the surface and fine pores of the porous substrate includes, but is not limited to, methods such as attachment, electrodeposition, and chemical plating. The selection of these components, the ratio between them and inorganic or organic compounds, and the addition rate of metal ions or metal oxides can be arbitrarily designed.

  In addition, the porous base material impregnated and retained with vitamins by the above-mentioned method causes long-term effects of vitamin components while chemically imparting water resistance and heat resistance by heat treatment in a hydrogen or nitrogen atmosphere. In particular, when a metal oxide is used, hydrogen reduction baking is preferable, and the degree of thermal degradation of vitamins can be reduced.

  As described above, according to the vitamin functional material according to the present invention, the fixation of vitamins is impregnation into a porous material such as silica gel, and the vitamin component is dissociated by binding by a neutralization reaction with an inorganic compound or an organic compound. The release performance of vitamin components can be controlled by the reaction ratio with inorganic compounds and organic compounds. Thus, since the vitamin component is chemically bonded to the inorganic compound or the organic compound, it is easily released even in a dry state.

  And, when installed as an attachment member in the refrigerator cabinet, it can keep freshness by suppressing oxidative deterioration that causes a decrease in freshness of fresh food products such as vegetables, fruits, meat and fish, and further, deodorization, antibacterial, etc. Can be expected.

  In addition, when used as a blowout filter for air conditioners, air purifiers, humidifiers, etc., when moisture air passes through or comes into contact with the air vents, vitamin components are easily released into the air as vitamin air, resulting in indoor antioxidants. It can be expected to have environmental improvement effects such as action, skin moisturizing effect, deodorization and antibacterial effect.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited to these Examples.

[Example 1]
First, the production of a porous structure having a large number of micropores as a substrate and a large number of ventilation holes as a structure will be described.

  60 parts by weight of sepiolite clay adjusted to a particle size of 325 mesh or less, 5 parts by weight of cordierite and methyl cellulose adjusted to a particle size of 200 mesh or less are dry-mixed, and 40 parts by weight of colloidal silica and 25 parts by weight of water are added thereto. The wet-kneaded material was filled into a vacuum kneader, and a honeycomb-shaped mold was attached to the die part and extrusion molded. This molded body was cured for 24 hours in an airless chamber at 20 to 25 ° C. and 75 to 85% humidity, and dried by heating from room temperature to 110 ° C. at 5 ° C. per minute. The dried molded body was fired at 950 ° C. using a general-purpose electric furnace or gas kiln, and a ceramic porous structure 1 having a water absorption rate of about 30% as shown in FIG. 1 was obtained. The ceramic porous structure 1 has a substantially rectangular parallelepiped shape, and a large number of rectangular ventilation holes 2 are formed vertically and horizontally.

Next, the manufacturing method of the vitamin functional material of a present Example performed using the said ceramic porous structure 1 is demonstrated.
As vitamins, L-ascorbic acid magnesium phosphate is used as an auxiliary material in addition to L-ascorbic acid as a vitamin C raw material. Further, 25% phosphoric acid and 40% colloidal silica are used as the inorganic compound, and silver is used as the metal additive.

  An aqueous solution prepared by sufficiently stirring and dissolving 5 to 20 parts by weight of ascorbic acid and 1 to 3 parts by weight of magnesium ascorbate as a vitamin C raw material is prepared in 40 to 100 parts by weight of a 25% phosphoric acid aqueous solution. The porous structure 1 is immersed for 1 hour. After taking out what was immersed, this was immersed for several seconds in a solution obtained by adding 5.0 parts by weight of ethyl alcohol and 0.5 parts by weight of silver to 100 parts by weight of 40% colloidal silica. For about 5 hours. And the ceramic porous structure 1 taken out from the dryer was moved to the hydrogen furnace, and it baked at 100-180 degreeC for 3 hours, and the vitamin functional material which has a honeycomb structure was obtained.

  As shown in Table 1, based on the above-described method for producing a vitamin functional material, six types of vitamin functions were prepared by changing 25% phosphoric acid aqueous solution to 0 to 100 parts by weight and 40% colloidal silica to 0 to 100 parts by weight. Prototype material was made. In addition, Control in Table 1 is a prototype as a comparative reference, and uses only ascorbic acid and magnesium ascorbate phosphate as raw materials.

  When the prototype vitamin functional material (vitamin / honeycomb ceramic) was attached to the outlet of an air cleaner, the vitamin release concentration of each sample was measured for the vitamin concentration in the air released into the room. Specifically, in an indoor atmosphere at a temperature of 25 ° C. and a humidity of 75% RH, it was evaluated how long the vitamin component remained floating in the air after the operation of the air cleaner was stopped, and the evaluation result Is shown in FIG. In addition, as a quantitative test of ascorbic acid, DPPH radical elimination method * -1 (* -1, DPPH; 1,1-diphenyl-2-picrylhydrazyl) was carried out.

  As shown in FIG. 2, in the reference sample (Control) using only ascorbic acid and magnesium ascorbate phosphate as the raw material, the residual amount of the vitamin component was suddenly reduced, and the vitamin component almost floated after 10 days. It turns out that it does not remain. In addition, it can be seen that also in Sample 1 to which 25% phosphoric acid aqueous solution was not added, the remaining amount of the vitamin component suspended suddenly decreased, and almost no vitamin component remained suspended after 13 days. Furthermore, as the mixing amount of 25% phosphoric acid aqueous solution is increased from sample 2 to sample 5 and the mixing amount of 40% colloidal silica is decreased, the floating residual amount of the vitamin component is gradually decreased. It can be seen that the vitamin retention performance increases from 2 to Sample 5 sequentially.

[Example 2]
First, the manufacturing method of the vitamin functional material of a present Example is demonstrated.
As vitamins, L-ascorbic acid, a vitamin C raw material, is used. Further, 25% phosphoric acid, 40% lithium silicate, 325 mesh zeolite is used as the inorganic compound, and silver is used as the metal additive.

  An aqueous solution prepared by sufficiently stirring and dissolving 20 parts by weight of ascorbic acid as a vitamin C raw material in 60 parts by weight of a 25% phosphoric acid aqueous solution is prepared, and the zeolite powder is immersed in this aqueous solution for 1 hour. The soaked zeolite was taken out and mixed with a solution obtained by adding 5.0 parts by weight of ethyl alcohol and 0.5 parts by weight of silver to 20 to 100 parts by weight of 40% lithium silicate, and vacuum drying set at 80 ° C. It was dried with a machine for about 5 hours. And the material taken out from the dryer was moved to the hydrogen furnace, and it baked at 150 degreeC for 3 hours, and obtained the vitamin functional material.

Next, production of a porous structure (superabsorbent corrugate) using the vitamin functional material will be described.
A corrugate was prepared by adding 60 parts by weight of a polymer absorbent whose particle size was adjusted to 200 mesh or less to 100 parts by weight of an aqueous solution mixed with 5 parts by weight of a urethane emulsion. To this, 10 to 40 parts by weight of the vitamin functional material produced above was mixed and dispersed in 100 parts by weight of a urethane emulsion, and applied to a corrugate with an adhesion amount of 10 to 50 g / m ² . They were dried at 100 to 105 ° C. for 24 hours to obtain a vitamin-supporting superabsorbent corrugate 11 as shown in FIG. The vitamin-supporting superabsorbent corrugate (corrugated porous structure) 11 has a substantially disk shape, and a large number of mountain-shaped vent holes 12 are formed in a spiral shape.

  As shown in Table 2, six types of porous structures (vitamin corrugates) were produced on a trial basis by changing the mixing amount of 40% lithium silicate from 20 parts by weight to 100 parts by weight based on the above production method. In addition, Control in Table 2 was made as a prototype for comparison, and only ascorbic acid was used as a raw material. In Sample 5, 40% lithium silicate was not added.

  With the prototype vitamin corrugate attached to the mist outlet of the humidifier, continuous operation was performed for 3 hours, 6 hours, and 9 hours. The humidifier is filled with pure water, and the generated vapor mist passes through the prototype corrugate and is discharged to the outside. And the dew condensation water of mist was collect | recovered in order to confirm whether the vitamin component was contained in vapor | steam mist, and the quantitative analysis of the amount of vitamin discharge | release was implemented by DPPH method. The analysis results for 3 hours, 6 hours, and 9 hours for each sample shown in Table 2 are shown in FIG.

  As shown in FIG. 4, in the reference sample (Control) using only ascorbic acid as a raw material, most of ascorbic acid is released by 3 hours, and the amount of ascorbic acid released is extremely reduced after 9 hours. I understand. On the other hand, in samples 1 to 5, the amount of ascorbic acid released gradually increased with time, and as the amount of 40% lithium silicate increased, the amount of ascorbic acid released was suppressed, and the long-term It can be seen that the release performance can be maintained.

Example 3
FIG. 5 is a schematic view showing a state in which a porous ceramic such as silica gel is impregnated with vitamins, and shows one particle of silica gel having a diameter of 0.1 to 3 μm. As shown in the figure, a large number of micropores 22 exist in one particle 21 of silica gel, and these micropores 22 are impregnated with a vitamin component 23, and an inorganic material such as lithium silicate or calcium phosphate is interposed between these micropores. The reaction component 24 of the compound is bound. Hereinafter, this is referred to as vitamin ceramics.

In this example, first, the skin permeability of ascorbic acid and vitamin ceramics was evaluated. The skin permeability evaluation method is as follows. For 0.5 ml of 1% aqueous solution of ascorbic acid or vitamin ceramics applied to 1 cm ² of skin, the concentration of ascorbic acid or vitamin ceramics permeated at 30-minute intervals was determined. analyzed.

  FIG. 6 is an explanatory view showing the evaluation results of skin permeability of ascorbic acid and vitamin ceramics. AsA indicates ascorbic acid and APM indicates vitamin ceramics. As shown in the figure, it can be seen that 1% vitamin ceramics (APM) has higher skin permeability of vitamins than 1% ascorbic acid (AsA).

Next, evaluation of vitamin C activity by skin permeation of vitamin ceramics was attempted. The evaluation method of vitamin C activity is that the conversion activity of vitamin ceramics permeated into the skin when 0.5 ml of 1% aqueous solution of vitamin ceramics is applied to 1 cm ² of the skin is 2 hours later And after 6 hours.

  FIG. 7 is an explanatory diagram showing evaluation results of vitamin C activity by skin permeation of vitamin ceramics. AsA indicates ascorbic acid and APM indicates vitamin ceramics. As shown in the figure, it can be seen that after 2 hours and 6 hours, 1% vitamin ceramics (APM) has higher activity of converting to vitamin C than 1% ascorbic acid (AsA).

1 is a plan view showing a ceramic porous structure used in Example 1. FIG. In Example 1, it is explanatory drawing which shows the evaluation result of the floating residual amount of a vitamin component at the time of attaching a vitamin honeycomb ceramic to the blower outlet of an air cleaner. 6 is a plan view showing a corrugated porous structure used in Example 2. FIG. It is explanatory drawing which shows the analysis result of the amount of vitamin discharge | release in 3 hours, 6 hours, and 9 hours at the time of attaching a vitamin corrugate to the mist blower outlet of a humidifier. It is the schematic which shows the state which impregnated porous ceramics with vitamins. In Example 3, it is explanatory drawing which shows the evaluation result of the skin permeability of ascorbic acid and vitamin ceramics. It is explanatory drawing which shows the evaluation result of the vitamin C activity by the skin permeation of vitamin ceramics.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ceramic porous structure 2 Rectangular ventilation hole 11 Corrugated porous structure 12 Mountain-shaped ventilation hole 21 One particle of silica gel 22 Micropore 23 Vitamin component 24 Reaction component of inorganic compound

Claims (12)

  A functional vitamin material characterized in that vitamins are adhered and held on a porous substrate with an inorganic or organic compound binder.   The vitamin functional material according to claim 1, wherein the vitamin includes not only a vitamin but also a vitamin derivative.   The vitamin functional material according to claim 1 or 2, wherein the inorganic compound binder is selected from one or more of silicates and phosphates.   The vitamin functional material according to claim 1 or 2, wherein the organic compound binder is selected from one or more of celluloses, polyvinyl alcohol, and emulsions.   The vitamin according to any one of claims 1 to 4, wherein one or more kinds of metal ions or metal oxides are dispersed in the vitamins adhered to and held on the porous substrate. Functional material.   The vitamin functional material according to any one of claims 1 to 5, wherein the porous substrate is molded as a porous structure having a plurality of ventilation holes.   Vitamin function characterized by impregnating and holding vitamins in porous substrate after immersing and drying porous substrate in mixed aqueous solution with inorganic or organic compound added to vitamins Method for producing a functional material.   The method for producing a vitamin functional material according to claim 7, wherein the vitamins include vitamin derivatives in addition to simple vitamins.   The method for producing a vitamin functional material according to claim 7 or 8, wherein the inorganic compound is selected from one or more of silicates and phosphates.   The method for producing a vitamin functional material according to claim 7 or 8, wherein the organic compound is selected from one or more of celluloses, polyvinyl alcohol, and emulsions.   The porous substrate was immersed in the mixed aqueous solution, then immersed in a solution in which one or more metal ions or metal oxides were mixed and dispersed, dried, and then fired. The method for producing a vitamin functional material according to any one of claims 7 to 10, wherein: The method for producing a vitamin functional material according to any one of claims 7 to 11, wherein the porous substrate is molded as a porous structure having a plurality of ventilation holes.

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