JP2009084182A - Harmful substance removing material and harmful substance removing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a harmful substance removing material containing a carrier supporting an antibody and subjected to antiseptic treatment and mildewproofing treatment effective to both of the production process which may take a long time and the storage and use in the form of product without deteriorating the antibody activity. <P>SOLUTION: The harmful substance removing material containing a carrier supporting an antibody further contains at least one kind of quick-acting material and at least one kind of slow-acting material as the material having antiseptic action and/or mildewproofing action. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hazardous substance removing material and a hazardous substance removing method. More specifically, the present invention relates to a harmful substance removing material including a carrier carrying an antibody, and includes a material having antiseptic and / or antifungal action, and a method for removing a harmful substance using the same. About.

Conventional antibody-carrying filters sometimes cannot utilize the performance of sufficient antibodies due to proliferation of germs and mold growth during product storage and use. Antibacterial processing and / or antifungal processing, which has been done to prevent this, has not been prepared for long-term production because no measures have been taken against the proliferation of bacteria and fungi in the antibody-bearing solution during production. .
In Patent Document 1, it is disclosed that antibacterial processing and antifungal processing are performed on a harmful substance removing material in which an antibody is supported on a carrier. Not taken. Therefore, it has been desired to develop an effective antiseptic and mildewproofing technology that achieves both rapid efficacy during production and delayed efficacy during product storage and use.
In addition, when a general antiseptic technique or antifungal technique is applied as it is, there is a high possibility of affecting the antibody activity, and therefore, a specific technical development for an antibody-carrying filter has been required.
Patent Document 2 discloses a silver halide photographic light-sensitive material as a technique paying attention to the propagation of germs and molds during and after production.
Patent No. 3642340 Japanese Examined Patent Publication No. 6-64315

An object of the present invention is a harmful substance removing material including a carrier carrying an antibody, and is suitable for both a production process and a product form storage and use that can take a long time without impairing antibody activity. It is an object of the present invention to provide a harmful substance removing material that has been subjected to effective antiseptic processing and antifungal processing.

As a result of diligent research to solve the above problems, the present inventors have found a combination of materials having antiseptic and / or antifungal effects that solve the above problems, and completed the present invention based on this knowledge. It came to do.
That is, the present invention provides the following [1] to [11].

[1] A harmful substance removal material comprising an antibody-supported carrier, comprising at least one fast-acting material and at least one slow-acting material as an antiseptic and / or antifungal material Substance removal material.
[2] The hazardous substance removing material according to [1], wherein the rapid-acting material includes a compound represented by the following general formula [I].

In the formula, R ₁ represents a lower alkylene group, which may be linear or branched. X is a halogen atom, a nitro group, a lower alkyl group, —COR ₂ ,

-SO ₃ M,

R ₂ is a hydrogen atom, —OM, a lower alkyl group, a lower alkoxy group,

Represents. R ₃ and R ₄ may be the same or different from each other and each represents a hydrogen atom, a lower alkyl group, —COR ₇ or —SO ₂ R ₇ , and R ₅ and R ₆ may be the same or different from each other. , Represents a hydrogen atom, a lower alkyl group, R ₇ represents a lower alkyl group, M represents a hydrogen atom, an alkali metal atom, and an atomic group necessary to form a monovalent cation, and n represents 0 or 1 Represents an integer up to 5.
[3] The hazardous substance removing material according to [1] or [2], wherein the slow-acting material includes a compound represented by the following general formula [II].

In the formula, R ₈ represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and the alkyl group may be cyclic. R ₉ , R ₁₀ , R ₁₁ and R ₁₂ are a hydrogen atom, halogen atom, nitro group, cyano group, alkyl group, aryl group, alkoxy group, aryloxy group, aralkyloxy group, carboxyl group, sulfo group, hydroxy group,

, —COR ₁₅ , —SO ₂ R ₁₅ , R ₁₃ and R ₁₄ represent a hydrogen atom, an alkyl group, —COR ₁₅ , —SO ₂ R ₁₅ , and R ₁₅ represents an alkyl group or an alkoxy group. These R ₉ , R ₁₀ , R ₁₁ and R ₁₂ may be the same or different from each other.
[4] The hazardous substance removing material according to any one of [1] to [3], wherein the content of the rapid-acting material is 1 to 100% by mass with respect to the content of the antibody.
[5] The hazardous substance removing material according to any one of [1] to [4], wherein the content of the slow-acting material is 0.01 to 3% by mass with respect to the content of the antibody.
[6] The hazardous substance removing material according to any one of [1] to [5], wherein the carrier is made of at least one polymer containing a carbonyl group and / or an ether group.

[7] The hazardous substance removing material according to any one of [1] to [6], wherein the carrier is a fiber having an average fiber diameter of 100 nm or less.
[8] The hazardous substance removing material according to any one of [1] to [7], wherein the antibody is a chicken egg antibody.
[9] The method according to any one of [1] to [8], wherein the antibody and the antiseptic and / or antifungal material are dissolved or dispersed in a solution in which the carrier is immersed. Hazardous material removal material.
[10] The hazardous substance removing material according to any one of [1] to [9], wherein the antibody faces the gas phase.
[11] A method for removing harmful substances, comprising removing harmful substances in a gas phase using the hazardous substance removing material according to any one of [1] to [10].

According to the present invention, a harmful substance removing material comprising an antibody-supported carrier, which is effective for both a production process that can take a long time without impairing antibody activity, and storage and use in a product form. Provided is a hazardous substance removing material which has been subjected to antiseptic and anti-mold processing. The hazardous substance removing material of the present invention has high productivity and high product reliability because the pot life of the supporting liquid during production is extended. The hazardous substance removing material of the present invention can remove harmful substances stably for a long period of time.
In the harmful substance removing material of the present invention in which fibers are used as a carrier, there is also an effect of eliminating clogging due to the loading of antibodies, and when the hazardous substance removing material of the present invention is used as a filter for an air cleaner. It is particularly useful.

Hereinafter, the present invention will be described in more detail.
The harmful substance removing material of the present invention is a harmful substance removing material comprising a carrier carrying an antibody, and has at least one fast-acting material and at least one slow-acting material as a material having antiseptic and / or antifungal action. Material.
The fast-acting material for antiseptic and / or anti-fungal action is a fast-acting material for anti-septic and / or anti-fungal action, and is mainly used in the production process (especially during preparation and storage of antibody-carrying liquid) It means a material that shows the effect of inhibiting the growth of molds.

The fast-acting material is not particularly limited as long as it has a preservative action and / or fungicidal action for a solution containing an antibody and does not affect the activity of the antibody. As the rapid-acting material, it is preferable to use a compound represented by the above general formula [I].

In the general formula [I], R ₁ represents a linear or branched lower alkylene group (for example, ethylene group, propylene group, methylethylene group, etc.), and an alkylene group having 1 to 6 carbon atoms is particularly preferable.
X is a halogen atom (e.g. a chlorine atom, a bromine atom, fluorine atom, etc.), a nitro group, a lower alkyl group (e.g. methyl, ethyl, iso- propyl group and tert- butyl group), - COR _2,

-SO ₃ M,
R ₂ represents a hydrogen atom —OM, a lower alkyl group (eg, methyl group, n-propyl group, tert-butyl group), a lower alkoxy group (eg, methoxy group, n-butoxy group, iso-propoxy group, etc.),

Represents.
R ₃ and R ₄ may be the same or different from each other, and each represents a hydrogen atom, a lower alkyl group (for example, a methyl group, an n-propyl group, an iso-amyl group, etc.), —COR ₇ , or —SO ₂ R ₇ . , R ₅ and R ₆ may be the same or different from each other and each represents a hydrogen atom or a lower alkyl group (for example, a methyl group, iso-butyl group, n-butyl group, etc.), and R ₇ represents a lower alkyl group (for example, Represents a methyl group, an ethyl group, an iso-propyl group, an n-butyl group, a tert-amyl group, etc.), and M is necessary to form a hydrogen atom, an alkali metal atom (for example, sodium, potassium, etc.) and a monovalent cation. A group of atoms (for example, ammonium cation, phosphonium cation, etc.), and n represents 0 or an integer from 1 to 5.

The preferred lower alkyl group and lower alkoxy group have a carbon number in the range of 1 to 6.
Next, typical specific examples of the compound represented by the general formula [I] are shown below, but the compound of the general formula [I] is not limited thereto.

These exemplified compounds are generally commercially available as reagents and can be easily obtained, and can also be easily synthesized by a reaction of ethylene oxide or the like using the corresponding phenol compound as an intermediate.

A delayed action material as an antiseptic and / or antifungal action is a delayed action material of an antiseptic and / or antifungal action, and it is mainly used to store or use the product during the storage or use. It means a material that exhibits a preventive effect.
The slow-acting material is not particularly limited, and any material may be used as long as it has antiseptic and / or antifungal effects on the carrier carrying the antibody and does not affect the activity of the antibody. . As the slow-acting material, a compound represented by the above general formula [II] is preferably used.

R ₈ represents a hydrogen atom or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms (for example, methyl group, ethyl group, n-propyl group, tert-octyl group, n-heptadecyl group, n-octadecyl group, 2-hydroxy Ethyl group, 2-carboxyethyl group, 2-cyanoethyl group, sulfobutyl group, etc.), substituted, unsubstituted aryl group (for example, phenyl group, o-methoxyphenyl group, p-chlorophenyl group, p-iso-propylphenyl) A cyclic alkyl group (such as a cyclohexyl group), a substituted or unsubstituted aryl group (such as a phenyl group or a 2,4-dinitrophenyl group), a substituted or unsubstituted aralkyl group (such as a benzyl group or p-methylbenzyl). group, p- isopropyl benzyl group) _{represents, R 9, R 10, R} 11 and R ₁₂ are a hydrogen atom, hydrin A xy group, a nitro group, a cyano group, a halogen atom (eg, a chlorine atom, a bromine atom, a fluorine atom, etc.), a carboxyl group, a sulfo group, a substituted unsubstituted alkyl group (eg, a methyl group, an ethyl group, an n-propyl group, tert-butyl group, n-hexyl group, etc.), substituted, unsubstituted aryl group (eg phenyl group o-methylphenyl group, p-acetamidophenyl group, m-methoxyphenyl group, p-chlorophenyl group, etc.), substituted , Unsubstituted alkoxy groups (for example, methoxy group, ethoxy group, n-hexyloxy group, methoxyethoxy group, etc.), substituted, unsubstituted aryloxy groups (for example, phenoxy group, p-chlorophenoxy group, o-carboxy) Phenoxy, m-methylphenoxy, m-nitrophenoxy, etc.), substituted and unsubstituted aralkyloxy groups ( In example benzyloxy group, p- chlorobenzyl group, a p-an iso-propyl benzyl group),

, —COR ₁₅ , SO ₂ R ₁₅ , wherein R ₁₃ and R ₁₄ are a hydrogen atom, a substituted unsubstituted alkyl group (for example, methyl group, ethyl group, 2-hydroxyethyl group, 2-ethoxycarbonylethyl group, 2-cyanoethyl) Group), —COR ₈ , —SO ₂ R ₈ , wherein R ₈ is a substituted or unsubstituted alkyl group (for example, a methyl group, an ethyl group, a 2-hydroxyethyl group, an iso-propyl group, an n-butyl group). Represents a substituted or unsubstituted alkoxy group (for example, methoxy group, ethoxy group, n-butoxy group, methoxyethoxy group, etc.).
The preferred carbon number of the alkyl group and alkoxy group of R ₉ , R ₁₀ , R ₁₁ , R ₁₂ , R ₁₃ , R ₁₄ and R ₁₅ is in the range of 1 to 10. R ₉ , R ₁₀ , R ₁₁ , and R ₁₂ may be the same or different from each other. Next, typical specific examples of the compound represented by the general formula [II] (hereinafter referred to as the compound II) are shown below, but the compound represented by the general formula [II] is not limited thereto.

  Exemplary compounds of the compound represented by the general formula [II] are generally commercially available as reagents and can be easily obtained.

Although it does not specifically limit as a support | carrier, A fiber is preferable. The fiber is preferably a fiber mainly composed of at least one of cellulose ester, vinylon, acrylic, and polyurethane. Moreover, the fiber which has a polyamide as a main component is also preferable. The main component as used in the field of this invention refers to the component which comprises 25% or more in the mass fraction in all the fibers.

  Cellulose ester refers to a cellulose derivative in which a hydroxyl group of cellulose is esterified with an organic acid. Examples of organic acids used for esterification include fatty carboxylic acids such as acetic acid, propionic acid, and butyric acid, and aromatic carboxylic acids such as benzoic acid and salicylic acid. It may be used alone or in combination. Although there is no restriction | limiting in particular about the ester group substitution rate of the hydroxyl group of a cellulose, It is preferable that it is 60% or more.

  Among the group of fibers used as the carrier in the present invention, cellulose acylate fibers are desirable. Cellulose acylate refers to a cellulose ester in which some or all of the hydrogen atoms constituting the hydroxyl group of cellulose are substituted with acyl groups. Examples of the acyl group include an acetyl group, a propionyl group, and a butyryl group. These groups may be constituted by replacing only one kind, or two or more kinds of acyl groups may be mixed and substituted. The total acyl group substitution degree is preferably 2.2 to 3.0, more preferably 2.2 to 2.8, and particularly preferably 2.2 to 2.7. Among these, cellulose acetate, cellulose acetate propionate, or cellulose acetate butyrate that satisfies this degree of substitution is preferable, and cellulose acetate is most preferable. Cellulose acylate is generally known to have different solvents depending on the degree of esterification, but after preparing a carrier with cellulose acylate having a high esterification rate in advance, the surface is hydrophilized by alkali hydrolysis treatment or the like. May be.

  Although it is possible to form a sufficiently practical harmful substance removal material using only cellulose acylate fibers, polyester fibers, polyolefin fibers, polyamides are used for the purpose of further improving strength and dimensional stability. The carrier may be formed of a blended fiber such as a fiber or an acrylic fiber. When blended fiber is used, the mass fraction of the cellulose acylate fiber is preferably 50% or more, and more preferably 70% or more.

  Of the groups of fibers used as carriers in the present invention, polyamide fibers are also desirable.

  In the present specification, polyamide refers to a fiber made of a linear polymer in which chemical structural units are bonded mainly by amide bonds.

  Among polyamides, a linear chain that is a combination of an aliphatic diamine such as ethylenediamine, 1-methylethylenediamine, 1,3-propylenediamine, and hexamethylenediamine and an aliphatic dicarboxylic acid such as malonic acid, succinic acid, and adipic acid. Type aliphatic polyamides are preferred. Nylon 66 is particularly preferable.

  Fats using lactams such as ε-caprolactam and laurolactam, aminocarboxylic acids such as aminocaproic acid and aminoundecanoic acid, para-aminomethylbenzoic acid and the like alone or as a copolymer component in addition to the diamine and dicarboxylic acid. A group polyamide can also be used. In particular, nylon 6 produced by using ε-caprolactam alone is preferable.

  In addition to these, a part or all of the aliphatic diamine used as a raw material is an aliphatic diamine such as cyclohexanediamine, 1,3-bis (aminomethyl) cyclohexane, and 1,4-bis (aminomethyl) cyclohexane. An aliphatic polyamide using an alicyclic dicarboxylic acid such as 1,4-cyclohexanedicarboxylic acid, hexahydroterephthalic acid, hexahydroisophthalic acid, etc. may be used as an aromatic polyamide and / or a part or all of the dicarboxylic acid. .

  Furthermore, by using aromatic diamines such as aliphatic paraxylylenediamine (PXDA) and metaxylylenediamine (MXDA), and aromatic dicarboxylic acids such as terephthalic acid as partial raw materials, water absorption is reduced and elastic modulus is improved. Also included is a polyamide that achieves the above. Moreover, the polymer which has an amide bond in a side chain like polyacrylic acid amide, poly (N-methylacrylic acid amide), poly (N, N-dimethylacrylic acid amide), etc. may be sufficient.

  Most preferred of the polyamides is nylon 66 or nylon 6. Appropriate hygroscopicity derived from amide bonds, easy to orient the molecular chain consisting of long chain fatty acids of appropriate length, relatively high stretchability, high heat of fusion and large heat capacity It is difficult to melt in terms of kinetics (melt resistance), the flexibility of molecular chains consisting of long-chain fatty chains, and the property that fibrillation and kink bands do not easily occur due to the formation of hydrogen bonds between amide bonds. This is because it is possible to utilize performances preferable as a carrier, such as flexibility.

  Similarly, for the purpose of improving strength and dimensional stability, the carrier may be reinforced with other appropriate structural materials such as metal, polymer material, ceramics and the like. These reinforcing materials are desirably used for portions other than the substantially outermost surface of the side surface to which the harmful substance removing material is supplied (for example, used on the opposite surface of the side surface or a core material).

  In this specification, vinylon is a fiber composed of a linear polymer containing 65% by mass or more of vinyl alcohol units, and having a moisture content of 7% or less after being left in an environment of temperature 20 ° C. and humidity 65% for 1 week or more. Point to. It may be a formalized hydroxyl group of vinyl alcohol, but it is a non-formalized fiber that has been subjected to water resistance treatment by a polymer such as a boric acid-crosslinked hydroxyl group or a known alkali spinning method or cooling gel spinning method. It may be. Components other than vinyl alcohol units may include ethylene chains, vinyl acetate chains, etc., but fibers formed from vinyl alcohol carriers are preferred. Furthermore, it is most desirable to be a non-formalized fiber by cooling gel spinning in that it is homogeneous and has a high degree of orientation and crystallinity, so that excellent mechanical properties and reliability can be obtained.

  Vinylon generally has high strength, high elastic modulus, moderate hydrophilicity, weather resistance, chemical resistance, adhesiveness, and the like with respect to other fibers, and these preferable performances can be utilized as a carrier. .

  In the present specification, acrylic refers to a fiber containing 40% or more of acrylonitrile group repeating units by mass ratio, for example, non-ionic such as acrylonitrile homopolymer, acrylate ester, methacrylate ester, vinyl acetate, etc. Examples include monomers and acrylonitrile copolymers, anionic monomers such as vinylbenzene sulfonic acid and allyl sulfonic acid, and acrylonitrile copolymers, or cationic monomers such as vinylpyridine and methylvinylpyridine, and acrylonitrile copolymers. So-called promix fibers formed from acrylonitrile and milk casein are also included in this category.

  In general, acrylic fibers are often produced by an organic wet spinning method. In this method, when the spinning stock solution forms a coagulated yarn in the coagulation bath, water as a coagulant enters the spinning stock solution spun from the nozzle, while the spinning solvent diffuses from the spun stock solution to the outside. At this time, the water and the organic solvent (DMF, DMAc, etc.) are mutually diffused, so that a polymer is precipitated and a coagulated yarn having a structure in which innumerable cavities are connected in a network form is formed. In addition, it is characterized by deformation of the fiber cross section formed by volume shrinkage due to diffusion of the solvent into the coagulation bath during the coagulation process and formation of irregularities by forming a macrofibril structure on the surface. These fine structures are preferable as the structure of the carrier used in the present invention from the viewpoint of improving the non-surface area and the ease of antibody loading.

  The acrylic fiber used in the present invention varies depending on the composition of the raw material polymer, the spinning method, the post-treatment conditions in the production process, etc., but generally, it is easy to obtain a bulky fiber with moderate hydrophilicity and high weather resistance. There are advantages.

  The polyurethane used in the present invention refers to a fiber composed of a linear synthetic polymer in which the bonding portion between monomers or the bonding portion between base polymer materials is mainly urethane bonds. It is desirable that the polyurethane segment contains 85% or more by mass ratio. It is desirable to be a block copolymer of a segmented polyurethane composed of a soft segment having a low melting point and a soft molecular weight of up to several thousand, and a hard segment having a high melting point and rigidity and high cohesion. Polyethers such as polypropylene glycol and polytetramethylene glycol can be used as the soft segment, and urethane groups formed from 4,4'-diphenylmethane diisocyanate, m-xylene diisocyanate, and the like can be used as the hard segment. Polyurethane is generally characterized by high elasticity. It varies depending on the temporary structure of the polymer chain, such as the chemical structure and distribution of both segments, and on the difference in secondary structure resulting from differences in the spinning conditions, but it stretches well. It has features such as high resilience, resistance to aging compared to rubber materials, and thin fibers can be obtained, and these properties can be utilized even when used as a carrier.

  Further, the volume swelling degree of the fibers constituting the carrier used in the present invention with respect to 20 ° C. water is 1.1% or more and less than 10%, preferably 1.1% or more and less than 8%, particularly preferably 1. 1% or more and less than 6%, most preferably 1.1% or more and less than 5%. In addition, the volume swelling degree of the fiber with respect to 20 degreeC water in this invention calculated | required the density of the fiber before and behind immersing a dry fiber in 20 degreeC pure water for 1 hour by the density gradient tube method (JIS-K7112). Refers to volume swelling.

  Regarding the mechanical properties and dimensional stability of the fibers constituting the carrier, it is desirable that the elongation at drying is 25% or more. Here, the elongation at drying refers to the breaking elongation in a tensile test at 20 ° C. of the fiber dried over a sufficiently long time. In general, it is preferable that the elongation at drying is 10% or more and that it is suitable for processing such as cloth making is 25% or more in order to prevent filter processing and breakage during practical use (leading to a decrease in filtration efficiency). % Or more is more preferable, and 35% or more is most preferable.

  The official moisture content of the fibers constituting the carrier is preferably 1.0% or more and less than 7.0%, more preferably 3.0% or more and less than 6.5%, and more preferably 5.0% or more and 6% or less. Most preferably, it is less than 5%. At the official moisture content in this area, the activity of the supported antibody can be expressed, and the carrier's mechanical strength, rigidity, and dimensional stability with respect to the environment (especially humidity) should be obtained. Can do.

  The moisture content referred to here is the official moisture content, and the official moisture content is the moisture content contained in the fiber when the fiber is left in an environment of 20 ° C. and a relative humidity of 65% for a long time. Point to. In the case of a blended fiber with other fibers, the official moisture content of the entire blended fiber is indicated.

  The surface of the fiber constituting the carrier preferably has a fine concavo-convex structure on the scale of several tens of nanometers to several micrometers. The shape of the irregularities may be a three-dimensional shape such as a groove or streak formed in a direction parallel to the fiber direction, or a groove or streak formed perpendicular to the fiber direction, that is, concentrically with respect to the axis. Three-dimensional shapes may be used, and these three-dimensional shapes formed at an arbitrary angle from the direction parallel to the fiber direction to the vertical direction may exist at an arbitrary ratio and density. Samples obtained by the known cellulose acetate fiber spinning method are known to form a chrysanthemum shape with an indefinite fiber cross section due to the formation of a skin layer on the surface layer and the depression of the skin layer accompanying solvent drying. This unevenness is also a preferred form in the present invention.

  The fine concavo-convex structure on the nanometer to micrometer scale may be a hole and / or a protrusion. The average diameter is preferably 50 nm to 1 μm of holes or protrusions. These vacancies and protrusions are formed in a spinning process by a method such as using a solution in which cavitation of a solution or a fine dispersoid is dispersed (for example, mixing with a slurry in which barium sulfate particles are dispersed), It can be formed in a subsequent step by a method such as hydrolysis of the group or surface oxidation treatment (for example, the surface of the fiber is celluloseized with an aqueous alkali solution and then the microcrater is expressed on the fiber surface by enzyme treatment).

  The average fiber diameter of the fibers used as the carrier is desirably 50 μm or less, more preferably 10 μm or less, particularly preferably 1 μm or less, and most preferably 100 nm or less. In addition, in this specification, an average fiber diameter is a numerical value calculated | required by measuring the diameter in the fiber in arbitrary 300 places from the observation image of a scanning electron microscope (SEM), and arithmetically averaging it.

  The fiber used as a carrier in the present invention can be produced by a general production method such as melt spinning, wet spinning, dry spinning, wet drying spinning, or physical treatment (for example, strong mechanical shearing treatment using an ultra-high pressure homogenizer). In order to ensure stable quality, it is preferable to use dry spinning or wet-dry spinning. In order to produce uniform fibers with an average fiber diameter of 100 nm or less, further processing techniques, 2005, 40, No. 2, 101, and 167; Polymer International, 1995, 36, 195- 201; Polymer Preprints, 2000, 41 (2), 1193; Journal of Macromolecular Science: Physics, 1997, B36, 169, etc. It is preferable to employ the electrospinning method.

  Solvents used for spinning include chlorinated solvents such as methylene chloride, chloroform and dichloroethane, amide solvents such as dimethylformamide, dimethylacetamide and N-methylpyrrolidone, and ketones such as acetone, ethyl methyl ketone, methyl isopropyl ketone and cyclohexanone. Any solvent that dissolves the resin used for the synthetic resin fiber, such as a solvent, an ether solvent such as THF or diethyl ether, an alcohol solvent such as methanol, ethanol, or isopropanol, or water can be used. These solvents may be used alone or in combination of two or more.

  When the electrospinning method is employed, a salt such as lithium chloride, lithium bromide, potassium chloride, or sodium chloride may be further added to the resin solution.

It is desirable that the fibers constituting the carrier of the harmful substance removing material of the present invention have a structure in which a three-dimensional network is formed by partial adhesion. By adopting such a structure, it is possible to improve processing and practical mechanical resistance, and to improve the reliability of the hazardous substance removing material. Moreover, the retention property of an antibody can be improved. The adhesion between fibers can be observed by a method such as SEM. The density of the bonding points between the fibers is preferably 10 or more per 1 mm square with respect to the projected surface area of the harmful substance removing material, and more preferably 100 or more.

  As a method for forming an adhesion point, it may be formed by an adhesion formed by a dry spinning method or a fusion point formed by a melt spinning method, or after spinning, addition of an adhesive, a plasticizing solvent, etc. You may perform the adhesion point formation process by. From the viewpoint of production cost, it is preferable to form adhesion points by a dry spinning method using an appropriate solution formulation.

  The antibody used in the hazardous substance removing material of the present invention is a protein that specifically reacts (antigen-antibody reaction) with a specific harmful substance (antigen), has a molecular size of 7 to 8 nm, and has a Y-shape. Having the molecular form of Of the Y-shaped molecular structure of an antibody, a pair of branch parts is called Fab and a trunk part is called Fc, and among these, a toxic substance is captured at the Fab part.

  The type of the antibody corresponds to the type of harmful substance that can be captured. Examples of harmful substances captured by antibodies include bacteria, molds, viruses, allergens, and mycoplasmas. Specifically, examples of bacteria include gram-positive bacteria, Staphylococcus (S. aureus and Staphylococcus epidermidis), micrococcus, anthrax, cereus, Bacillus subtilis, acne, and gram-negative bacteria. And Pseudomonas aeruginosa, Serratia, Sephacia, Streptococcus pneumoniae, Legionella, and Mycobacterium tuberculosis. Examples of molds include Aspergillus, Penicillius, and Cladosporium. Examples of the virus include influenza virus, coronavirus (SARS virus), adenovirus, rhinovirus and the like. Examples of allergens include pollen, mite allergen, cat allergen and the like.

  Examples of the method for producing the antibody include, for example, a method in which an antigen is administered to an animal such as a goat, horse, sheep, or rabbit, and a polyclonal antibody is purified from the blood, and a spleen cell and a cultured cancer cell of the animal to which the antigen is administered. Methods for purifying monoclonal antibodies from cell cultures and body fluids (such as ascites) of animals that have been transplanted with the cultures, purified antibodies from genetically modified bacteria, plant cells, or animal cell cultures into which antibody-producing genes have been introduced And a method of purifying a chicken egg antibody from egg yolk powder obtained by administering an antigen to a chicken to produce an immunized egg and sterilizing and spray-drying the egg yolk liquid. Among these, the method of obtaining an antibody from a chicken egg can easily obtain a large amount of the antibody and can reduce the cost of the harmful substance removing material.

  The antibody used in the hazardous substance removing material of the present invention is preferably a chicken egg antibody.

  As a method of supporting (immobilizing) the antibody on the carrier, in addition to a method of physically adsorbing the antibody on the carrier, the carrier is silanized using γ-aminopropyltriethoxysilane and the like, and then glutarylated. A method of introducing an aldehyde group onto the surface of the carrier with aldehyde or the like and covalently bonding the aldehyde group and the antibody, a method of immobilizing the antibody on the carrier by ionic bonding by immersing an untreated carrier in an aqueous solution of the antibody, a specific method A method of introducing an aldehyde group into a carrier having a functional group and covalently bonding the aldehyde group and the antibody, a method of ion-binding the antibody to a carrier having a specific functional group, and coating the carrier with a polymer having a specific functional group A method of introducing an aldehyde group later and covalently binding the aldehyde group to the antibody can be mentioned.

Here, examples of the specific functional group include an NHR group (R is any alkyl group other than H, methyl, ethyl, propyl, and butyl), NH ₂ group, C ₆ H ₅ NH ₂ group, and CHO group. , COOH group, and OH group.

  Also, there is a method in which the functional group on the surface of the carrier is converted to another functional group using BMPA (N-β-Maleimidopropionic acid) or the like, and then the functional group and the antibody are covalently bonded (SH group in BMPA). Are converted to COOH groups).

  Furthermore, there is a method in which a molecule (Fc receptor, protein A / G, etc.) that selectively binds to the Fc portion of the antibody is introduced onto the surface of the carrier and the antibody Fc is bound thereto. In this case, the Fab that captures the harmful substance faces outward with respect to the carrier, and the probability of contact of the harmful substance with the Fab increases, so that the harmful substance can be efficiently captured.

The antibody may be supported on a carrier via a linker. In this case, the degree of freedom of the antibody on the carrier is increased and access to harmful substances is facilitated, so that high removal performance can be obtained. Examples of the linker include bi- or higher-valent cross-linking reagents, specifically maleimide, NHS (N-Hydroxysuccinimidyl) ester, imide ester, EDC (1-Ethyl-3- [3-dimethylaminopropyl] carbodiimido), There is PMPI (N- [p-Maleimidophenyl] isocyanate), which is selective to target functional groups (SH group, NH ₂ group, COOH group, OH group) and non-selective. Moreover, the distance (space arm) between crosslinks also changes for every crosslink reagent, and it can select in the range of about 0.1 nm-3.5 nm according to the target antibody. From the viewpoint of efficiently capturing harmful substances, those that bind to the Fc of the antibody as a linker are preferred.

  As a method for introducing a linker, either a method in which a linker is bound to an antibody and then further bound to the antibody, or a method in which a linker is bound to a carrier and the antibody is bound to the linker on the carrier is possible. is there.

As a method for incorporating the fast-acting material and the slow-acting material into the harmful substance removing material, a method of impregnating the carrier, a method of covalently bonding a specific functional group of the carrier and the material in the same manner as described above, an ion Examples thereof include a method of immobilizing on the carrier by binding.

The method for producing the hazardous substance removing material of the present invention is not particularly limited, and examples thereof include a method for producing a material by immersing a carrier in a solution (supporting solution) containing an antibody and causing the carrier to carry the antibody. The fast-acting material and the slow-acting material are preferably dissolved or dispersed in the support liquid. By using a support liquid containing an antibody and a fast-acting material and the slow-acting material, it is possible to support the antibody on a carrier and simultaneously contain the fast-acting material and the slow-acting material in the harmful substance removal material. Because there is. Further, by dissolving or dispersing the rapid-acting material in the supporting liquid, it is possible to suppress the growth of germs and molds during the preparation and storage of the supporting liquid.

The rapid-acting material may be 1 to 100% by mass, preferably 1 to 50% by mass, more preferably 2 to 40% by mass with respect to the antibody in the support liquid. The slow-acting material may be 0.01 to 3% by mass, preferably 0.01 to 1% by mass, and more preferably 0.02 to 0.05% by mass with respect to the antibody in the support liquid. If the content of the fast-acting material or the slow-acting material is too small, sufficient antiseptic action and / or antifungal action may not be obtained, and if it is too much, the activity of the antibody may be adversely affected. The content ratio of the antibody, fast-acting material, and slow-acting material in the carrier solution is usually the same as the content ratio of the antibody, fast-acting material, and slow-acting material supported on the carrier in the hazardous substance removing material of the present invention. It can be considered to be reflected.

The hazardous substance removing material of the present invention can remove harmful substances in the gas phase or liquid phase.
The hazardous substance removing material of the present invention can be used for filters, masks, wipes and the like for air cleaners.
In the harmful substance removing material of the present invention, the activity of the antibody is high and the activity of the antibody lasts even in a dry environment facing the gas phase.

  The present invention will be described more specifically with reference to the following examples. The following embodiments can be modified as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention is not limited to the following specific examples.

(Example 1) Cellulose acetate (manufactured by Aldrich, total substitution degree 2.4, number average molecular weight 30,000) in acetone: water (97: 3) solution (10% by mass) is used to produce a nanofiber production apparatus (manufactured by Kato Tech: FIG. 1). Was used for electrospinning at a syringe feed rate of 0.05 mm / min and an applied voltage of 15 kV, and further dried in a vacuum at 80 ° C. for 8 hours to prepare a fine nonwoven fabric sample having a film thickness of 85 μm. The average fiber diameter of this sample was 80 nm as measured by SEM. Next, an influenza antibody (IgY antibody) produced by purifying an immunized egg born by an antigen-administered chicken is dissolved in phosphate buffered saline (PBS), and the antibody concentration is adjusted to 100 ppm and carried. A liquid was prepared. To this carrier liquid, phenoxyethanol (I-1) was added to 3 ppm, and 1,2-benzisothiazolone (II-1) was added to 0.03 ppm and stirred. Thereafter, the supported liquid was filtered through a 0.45 μm filter. The N-1 was immersed in the support liquid at room temperature for 16 to 24 hours to support the antibody, the compound I-1 and the compound II-1 on the fiber surface to obtain a sample N-1.

Example 2 Samples N-2 to N-4 were obtained in the same manner as in Example 1 except that the compounds I-1 and II-1 of Example 1 were replaced with the compounds and amounts shown in Table 1.
Comparative Example Samples H-1 to 6 were obtained in the same manner except that the compounds I-1 and II-1 and the carrier of Example 1 were replaced with the conditions shown in Table 1.

[Evaluation of virus inactivation efficiency]
As the test virus solution, purified influenza virus diluted 10 times with PBS (200,000 plaques / mL) was used. Each of the above samples was cut into 5 cm squares and attached and fixed in the center of the virus spray test apparatus. The test virus solution was put in a nebulizer installed on the upstream side, and a virus recovery device was attached on the downstream side. Compressed air was sent from an air compressor, and the test virus was sprayed from the nebulizer spray port. A gelatin filter was installed on the downstream side of the sample, and air in the test apparatus was sucked at a suction flow rate of 10 L / min for 5 minutes to collect passing virus mist. After the test, the gelatin filter collecting the virus was collected, and the virus infectivity after passing through the sample was determined by the TCID50 method (50% cell infectious dose measurement method) using MDCK cells. From the comparison of the virus infectivity of the gelatin filter with and without the sample, the transient removal rate of the virus of each sample was calculated. The results are shown in Table 1.

[Evaluation of antiseptic and antifungal effects]
Spore suspension of black koji mold, blue mold cultivated according to JIS Z-2911, and no added compound (ie, Comparative Example H-1) Then, 10 mL each was sprayed uniformly on each of the above samples cut into 10 cm squares, and the samples were left in an environment of 40 ° C. and 90% for 1 week. The growth of mold and the progression of decay in each sample after standing were visually evaluated according to the evaluation criteria shown in Tables 2 and 3.
Moreover, the temporary removal rate in each sample after stationary was evaluated similarly to the above. The results are shown in Table 1.

[Pressure loss]
Using a manometer, the pressure difference between the upstream and downstream when the sample (sample immediately after production) was blown at a linear velocity of 0.1 m / s was measured. The results are shown in Table 1.

From the above results, it can be seen that the hazardous substance removing material of the present invention has an excellent antifungal effect and antiseptic effect, and the function is maintained for a long time by these actions. Moreover, it turns out that there is little clogging of a filter compared with the hazardous | toxic substance removal material of a comparative example.

It is the schematic of the electrospinning apparatus used by the Example and the comparative example.

Explanation of symbols

11 Power supply device 12 Syringe 13 Needle 14 Collector 15 Polymer solution 16 Nanofiber

Claims (11)

Hazardous substance removing material comprising a carrier carrying an antibody, the material comprising at least one fast-acting material and at least one slow-acting material as a material having antiseptic and / or antifungal action . The hazardous substance removing material according to claim 1, wherein the rapid-acting material contains a compound represented by the following general formula [I].
In the formula, R ₁ represents a lower alkylene group, which may be linear or branched. X is a halogen atom, a nitro group, a lower alkyl group, —COR ₂ ,
-SO ₃ M,
R ₂ is a hydrogen atom, —OM, a lower alkyl group, a lower alkoxy group,
Represents. R ₃ and R ₄ may be the same or different from each other and each represents a hydrogen atom, a lower alkyl group, —COR ₇ or —SO ₂ R ₇ , and R ₅ and R ₆ may be the same or different from each other. , Represents a hydrogen atom, a lower alkyl group, R ₇ represents a lower alkyl group, M represents a hydrogen atom, an alkali metal atom, and an atomic group necessary to form a monovalent cation, and n represents 0 or 1 Represents an integer up to 5. The harmful substance removing material according to claim 1 or 2, wherein the slow-acting material contains a compound represented by the following general formula [II].
In the formula, R ₈ represents a hydrogen atom, an alkyl group, an aryl group, or an aralkyl group, and the alkyl group may be cyclic. R ₉ , R ₁₀ , R ₁₁ and R ₁₂ are a hydrogen atom, halogen atom, nitro group, cyano group, alkyl group, aryl group, alkoxy group, aryloxy group, aralkyloxy group, carboxyl group, sulfo group, hydroxy group,
, —COR ₁₅ , —SO ₂ R ₁₅ , R ₁₃ and R ₁₄ represent a hydrogen atom, an alkyl group, —COR ₁₅ , —SO ₂ R ₁₅ , and R ₁₅ represents an alkyl group or an alkoxy group. These R ₉ , R ₁₀ , R ₁₁ and R ₁₂ may be the same or different from each other. The harmful substance removing material according to any one of claims 1 to 3, wherein a content of the fast-acting material is 1 to 100 mass% with respect to a content of the antibody. The harmful substance removing material according to any one of claims 1 to 4, wherein a content of the slow-acting material is 0.01 to 3 mass% with respect to a content of the antibody. The hazardous substance removing material according to any one of claims 1 to 5, wherein the carrier comprises at least one polymer containing a carbonyl group and / or an ether group. The harmful substance removing material according to any one of claims 1 to 6, wherein the carrier is a fiber having an average fiber diameter of 100 nm or less. The harmful substance removing material according to any one of claims 1 to 7, wherein the antibody is a chicken egg antibody. The hazardous substance removing material according to any one of claims 1 to 8, which is produced by immersing the carrier in a solution in which the antibody and the antiseptic and / or antifungal material are dissolved or dispersed. . The hazardous substance removing material according to any one of claims 1 to 9, wherein the antibody faces the gas phase. A method for removing harmful substances, comprising removing harmful substances in a gas phase using the hazardous substance removing material according to any one of claims 1 to 10.