KR102086295B1 - Wooden furniture with excellent antibacterial properties, and method of manufacturing thereof - Google Patents

Abstract

The present invention relates to wooden furniture with excellent antibacterial properties and coating properties, and a method for manufacturing the same. Specifically, the present invention relates to wooden furniture which is processed with an antibacterial composition comprising a base resin, a surface modified cellulose-based raw material, metal oxide particles, zinc pyrithione, and an organic solvent; and a method for manufacturing the same.

Description

Wooden furniture with excellent antibacterial properties, and method of manufacturing

The present invention relates to a wooden furniture having excellent antimicrobial properties and a method of manufacturing the same.

Wood has excellent durability, electrical insulation and thermal stability, and is applied to various parts such as exteriors, interior materials, and furnitures of buildings, and has excellent processability, and unlike petrochemicals, no harmful substances are generated during combustion. Although it is closely used as a friendly material, it is vulnerable to moisture and microorganisms, so researches to improve the antimicrobial properties of wood are continuously conducted.

Republic of Korea Patent Publication No. 10-1360938 improves flame retardant performance by the addition of fly ash (Fly ash), and proposes a synthetic wood having antibacterial and forest bath effect by using a cypress wood powder containing Phytoncide have.

In addition, Korean Patent Publication No. 10-1651585 discloses a phytoncide concentrate extracted by condensing and extracting a liquid phytoncide generated in the process of artificially drying a cypress having excellent phytoncide content by heating to improve antibacterial and antifungal resistance. Is a flame retardant with antimicrobial and anti-mold performance, characterized by the production of flame retardant wood, which is resistant to fungi and mold by mixing with non-formalin flame retardant and impregnating it with wood using a pressure impregnation equipment. And a preparation method thereof.

In addition, the Republic of Korea Patent Publication No. 10-1077253 is a method for producing an environmentally friendly synthetic wood that is excellent in antimicrobial properties and significantly increased flexural strength by producing a synthetic wood by adding a powder of activated carbon fiber, antibacterial agent, nano fine particles titania photocatalyst and talc. Presenting.

On the other hand, the antimicrobial agent added to the antimicrobial treatment composition of wood can be largely classified into inorganic antibacterial and organic antimicrobial agent, organic antimicrobial agent has excellent dispersibility but poor persistence, can cause harmful microorganisms when the added content is not appropriate Inorganic antimicrobial agent has a long lasting, but there is a limit that the hydrophobic resin and the cross-linking ability is not good, and the aesthetic appearance of the coating film is reduced when a large amount is added.

Republic of Korea Patent Publication No. 10-1360938 (2014.02.04) Republic of Korea Patent Publication No. 10-1651585 (2016.08.22) Republic of Korea Patent Publication No. 10-1077253 (2011.10.20)

In order to solve the problems as described above, an object of the present invention is to provide a wooden furniture and a method of manufacturing the improved antibacterial, antimicrobial persistence and coating properties.

One aspect of the present invention for achieving the above object relates to a wooden furniture processed with an antimicrobial composition comprising a base resin, surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione and an organic solvent.

In one embodiment, the antimicrobial composition is 1 to 20 parts by weight of surface-modified cellulose-based raw material, 0.1 to 5 parts by weight of metal oxide particles, 0.1 to 3 parts by weight of zinc pyrithione, and organic based on 100 parts by weight of the base resin It may be to include 50 to 200 parts by weight of the solvent.

In one embodiment, the surface-modified cellulose-based raw material may be a dispersion of the cellulose-based raw material in a silane coupling agent.

In one embodiment, the metal oxide particles may be copper oxide (I) (Cu ₂ O), copper oxide (II) (CuO), or a mixture thereof, wherein the metal oxide particles have an average particle size of 1 nm. To 50 μm.

In one embodiment, the antimicrobial composition may further include polyethylene glycol having a weight average molecular weight of 200 to 800 g / mol, and may include 0.1 to 10 parts by weight of polyethylene glycol based on 100 parts by weight of the base resin.

In one embodiment, the antimicrobial composition may further include a multifunctional acrylate monomer, and may include 0.1 to 20 parts by weight of the multifunctional acrylate monomer based on 100 parts by weight of the base resin.

In addition, another aspect of the present invention comprises the steps of a) preparing an antimicrobial composition comprising a base resin, a surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione and an organic solvent; And b) processing wood with the antimicrobial composition.

In another aspect, the wood may be sand blasted.

The wooden furniture according to the present invention may have excellent antimicrobial and antimicrobial persistence as it is processed into an antimicrobial composition comprising a base resin, a surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione and an organic solvent. It is excellent in adhesiveness and the coating film may not be easily peeled off or damaged.

Hereinafter will be described in detail with respect to the wooden furniture excellent antibacterial and a method for manufacturing the same. The drawings introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention is not limited to the drawings presented below and may be embodied in other forms, and the drawings presented below may be exaggerated to clarify the spirit of the present invention. At this time, if there is no other definitions in the technical terms and scientific terms used, those having ordinary skill in the technical field to which the present invention has a meaning commonly understood, the gist of the present invention in the following description and the accompanying drawings. Descriptions of well-known functions and configurations that may be unnecessarily blurred are omitted.

One aspect of the invention relates to wood furniture processed with an antimicrobial composition comprising a base resin, a surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione and an organic solvent.

As such, the wooden furniture according to the present invention may have excellent antimicrobial and antimicrobial persistence as it is processed into an antimicrobial composition comprising a base resin, a surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione, and an organic solvent, and coating Due to its excellent properties and adhesiveness, the coating film may not be easily peeled off or damaged.

To this end, it is important to appropriately adjust the content of each component of the antimicrobial composition, and in one specific example, the antimicrobial composition is 1 to 20 parts by weight of the surface-modified cellulose-based raw material, metal oxide based on 100 parts by weight of the base resin. 0.1 to 5 parts by weight of particles, 0.1 to 3 parts by weight of zinc pyrithione, and 50 to 200 parts by weight of an organic solvent. More preferably, 5 to 15 parts by weight of the surface-modified cellulose-based raw material, 1 to 3 parts by weight of metal oxide particles, 0.5 to 1.5 parts by weight of zinc pyrithione, and 100 to 150 parts by weight of an organic solvent, based on 100 parts by weight of the base resin. It may be. In this range, the desired antimicrobial effect and coating effect can be excellent.

On the other hand, the wood of the wooden furniture processed with the antimicrobial composition may be slabs, wood, aggregated wood, plywood, medium density fiberboard (MDF, medium density fiberboard) or particle board (PB, particle board) and the like, the processing is largely three The first aspect of coating the surface of the wood with an antimicrobial composition, the second aspect of applying a antimicrobial composition to the laminated surface of the wood to laminate a plurality of wood to produce a wood plywood, the antimicrobial composition, wood fibers, It may be a third aspect of manufacturing a wood plastic composite by rolling a composite wood composition mixed with an organic solvent and additives.

In addition, the wooden furniture is not particularly limited as long as it is a commonly available use, for example, desks, chairs, tables, bookcases, decorative cabinets, chests of drawers, shoe cabinets, TVs, beds, dressing table, closet, duvet, It can be used as a dresser, dining table, shelf, office desk, office chair, office locker, office file drawer, partition, classroom desk, classroom stool, classroom, cleaning tool box or partition type reading table. In addition, the wooden furniture may refer to all furniture including wood, and in detail, some parts may be furniture made of wood and furniture made of wood. In addition, the wooden furniture may be in the form of a used or used in one place or moveable with a wheel.

Hereinafter, each component of the said antimicrobial composition is demonstrated in detail.

In one example of the invention, the base resin can be used without particular limitation as long as it is commonly used in the art, specific examples of acrylic resin, melamine resin, urethane resin, epoxy resin, silicone resin, polyester It may include any one or two or more selected from the group consisting of resin, polyamic acid resin, polyimide resin, styrene maleic acid resin and styrene maleic anhydride resin, but can be used without limitation as long as it is a resin applicable to wood have. More preferably, the base resin may be a urethane resin or an acrylic resin.

In one embodiment of the invention, the surface-modified cellulose-based raw material is a hydrophobically modified surface of the cellulose-based raw material in order to improve the mixing and interfacing with the base resin, specifically the surface-modified cellulose-based raw material The cellulose-based raw material may be dispersed in a silane coupling agent. As such, by treating the cellulose-based raw material with the silane-based coupling agent, the mixing and interfacial properties with the base resin may be further improved, thereby increasing the coating property of the antimicrobial composition on wood.

The cellulose-based raw material may be any one or two or more selected from the group consisting of wood powder, bamboo flour, chaff powder, cellulose powder, and the like. Specifically, the cellulose-based raw material has an average particle diameter of 10 to 300 ㎛, length: diameter The ratio of 1: 0.2 to 1 can be used. Since the cellulose-based raw material has a high affinity with wood, it is excellent in forming a coating film during wood processing, and it is possible to prevent the artificial texture and color of the wood by the addition of an inorganic antimicrobial agent.

The silane coupling agent is not particularly limited as long as it is commonly used, and may be any one or two or more selected from the group consisting of, for example, amino silane, epoxy silane, acrylic silane, mercapto silane, vinyl silane, and the like. have. As a more specific example, the silane coupling agent is vinyl trichlorsilane, vinyl trimethoxysilane, vinyl triethoxysilane, 2- (3,4 epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxy Propyltrimethoxysilane, 3-glycidoxyoxymethyldiethoxysilane, 3-glycidoxyoxytriethoxysilane, p-styryltrimethoxysilane, 3-methacryloxypropylmethyldimethoxysilane, 3- Methacryloxypropyltrimethoxysilane, 3-methacryloxydipropylmethyldiethoxysilane, 3-methacryloxypropyltriethoxysilane, 3-acryloxypropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropylmethyldimethoxysilane, N- (2-aminoethyl) -3-aminopropyltrimethoxysilane, N- (2-aminoethyl) -3-aminopropyltriethoxysilane, 3-aminopropyl Trimethoxysilane, 3-aminopropyltriethoxysilane, 3-triethoxysilyl-N- (1,3-dimethyl- Hydrochloride, 3-ureidopropyltrie of thilidene) propylamine, N-phenyl-3-aminopropyltrimethoxysilane, N- (vinylbenzyl) -2-aminoethyl-3-aminopropyltrimethoxysilane Methoxysilane, 3-chloropropyltrimethoxysilane, 3-mercaptopropylmethyldimethoxysilane, 3-mercaptopropyltrimethoxysilane, bis (triethoxysilylpropyl) tetrasulfide and 3-isocyanatepropyltrie It may be any one or two or more selected from the group consisting of oxysilane and the like.

Preferably, the silane coupling agent may be an amino silane, the methoxide of the amino silane may be dehydrated from moisture of the wood material, and the amine group may be crosslinked with the base resin to improve bonding.

The silane coupling agent may be used a second organic solvent for adjusting the concentration and viscosity, the kind may be a conventional organic solvent. Specific examples include aliphatic hydrocarbons such as hexane and heptane; Aromatic hydrocarbons such as toluene and xylene; Alcohols such as methanol, ethanol, isopropanol, butanol and isobutanol; Ethers such as a cellulose unit and a butyl cellulose unit; Esters such as ethyl acetate, butyl acetate and amyl acetate; Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Amides such as N-dimethylformamide and dimethylacetamide; It may be any one or two or more selected from the group consisting of, preferably aromatic hydrocarbons, alcohols or a mixed solvent thereof, but this is only one example, the present invention is not limited thereto, antimicrobial composition It may be the same as or different from the organic solvent contained in.

The concentration of the silane coupling agent may be 0.1 to 10% by weight, more preferably 1 to 5% by weight. In such a range, the cellulose-based raw material can be effectively surface modified. In addition, during the surface pretreatment, 5 to 30 parts by weight of the cellulose-based raw material may be added to 100 parts by weight of the silane coupling agent solution, and stirred for 5 to 60 minutes at a speed of 50 to 150 rpm, after which the surface-modified cellulose-based raw material is separated. And, it is dried for 1 to 24 hours with hot air of 50 to 70 ℃ can obtain a surface-modified cellulose-based raw material.

More preferably, the cellulose-based raw material may be pretreated with an alkaline solution before surface modification with a silane coupling agent. This can swell the small pores in the cellulose, and can increase the permeability of the silane-based coupling agent through the swelling of the cellulose to further improve the crosslinkability with the base resin having hydrophobicity.

The alkaline solution may be any one of sodium hydroxide, potassium hydroxide, calcium hydroxide, ammonium hydroxide, sodium carbonate, sodium hydrogen carbonate and a combination thereof, the concentration of the alkaline solution may be 1 to 15% by weight, alkaline solution 100 1 to 25 parts by weight of cellulose-based raw materials may be added to the parts by weight, followed by stirring at 100 to 200 rpm for 30 to 120 minutes to obtain pretreated cellulose-based raw materials. However, the present invention is not limited thereto. .

In one embodiment of the invention, the metal oxide particles may be used without particular limitation as long as the metal oxide particles having antimicrobial properties, preferably copper (I) (Cu ₂ O), copper (II) (CuO) or Mixtures thereof. In particular, it is most preferable to use copper oxide (I) having high antibacterial activity and antiviral activity. Since copper oxide (I) is more likely to elute copper ions than copper oxide (II), the eluted copper ions are microorganisms or viruses. It may be easy to bind to enzymes and proteins to decrease their activity, thereby inhibiting the metabolic function of microorganisms and viruses. In addition, it may be easy to deoxidize oxygen in the air by catalyzing the eluted copper ions to decompose organic matter of microorganisms and viruses.

The metal oxide particles may have an average particle size of 1 nm to 50 μm, more preferably 0.1 to 10 μm. If the average particle size is less than 1 nm, the particles may aggregate with each other. If the average particle size is larger than 50 μm, the surface area per unit area becomes small, so that the antimicrobial activity cannot be sufficiently exerted. Therefore, it is preferable not to depart from the above range.

Meanwhile, the metal oxide particles may be surface pretreated. Through surface pretreatment, water insoluble coatings can be formed on the surface of metal oxide particles, preventing oxidation and discoloration, improving lubricity and dispersibility, and improving bonding properties with base resins and surface-modified cellulose-based raw materials. have.

Specifically, the metal oxide particles may be surface pretreated with a surface pretreatment solution containing a phosphate compound, a chromium compound, or a mixture thereof, and may preferably be surface pretreated with a solution of a phosphate compound having less harmfulness to humans and the environment. For example, the phosphate compound is not particularly limited as long as it can form phosphate ions on a solvent, but may be any one or two or more selected from the group consisting of phosphoric acid, polyphosphoric acid, phosphoric acid derivatives and phosphorous acid, and more specifically, Non-limiting example may be any one or two or more selected from the group consisting of ammonium phosphate, potassium phosphate, sodium phosphate and calcium phosphate. Such a phosphate compound forms a film by forming a metal phosphate salt on the surface of a metal oxide particle.

The surface pretreatment solution may be used having a concentration of 3 to 20% by weight, wherein the solvent used may be distilled water, a third organic solvent or a mixed solvent thereof, preferably, a third organic solvent. .

The type of the third organic solvent may be a conventional organic solvent, and specific examples include aliphatic hydrocarbons such as hexane and heptane; Aromatic hydrocarbons such as toluene and xylene; Alcohols such as methanol, ethanol, isopropanol, butanol and isobutanol; Ethers such as a cellulose unit and a butyl cellulose unit; Esters such as ethyl acetate, butyl acetate and amyl acetate; Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Amides such as N-dimethylformamide and dimethylacetamide; It may be any one or two or more selected from the group consisting of, preferably aromatic hydrocarbons, alcohols or a mixed solvent thereof, but this is only one example, the present invention is not limited thereto, antimicrobial composition It may be the same as or different from the organic solvent contained in.

In addition, during the surface pretreatment, 5 to 30 parts by weight of metal oxide particles may be added to 100 parts by weight of the surface pretreatment solution, and then stirred for 5 to 60 minutes at a speed of 50 to 150 rpm to obtain surface pretreated metal oxide particles. It can be washed with, and dried for 12 to 24 hours at 60 to 90 ℃.

In one embodiment of the invention, the zinc pyrithione (Zn-pyrithione) is to further improve the antibacterial and antibacterial properties of the antimicrobial composition, zinc pyrithione can be used as a suspension dispersed in water, in general It is commercialized as a 48% by weight suspension, but zinc pyrithione (100%) may be used.

In one embodiment of the invention, the organic solvent is not particularly limited, but it is preferable to appropriately select an antimicrobial composition that is homogeneously mixed, easily volatilized at the time of forming a coating film, and does not cause hardening inhibition or the like.

As a specific example, the organic solvent may be aliphatic hydrocarbons such as hexane and heptane; Aromatic hydrocarbons such as toluene and xylene; Alcohols such as methanol, ethanol, isopropanol, butanol and isobutanol; Ethers such as a cellulose unit and a butyl cellulose unit; Esters such as ethyl acetate, butyl acetate and amyl acetate; Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Amides such as N-dimethylformamide and dimethylacetamide; It may be any one or two or more selected from the group consisting of, and the like, preferably aromatic hydrocarbons, alcohols or a mixed solvent thereof may be used, but this is only one example and the present invention is not limited thereto.

In addition, the antimicrobial composition may further include additional components within the scope of not impairing the object of the present invention.

In one embodiment of the present invention, the antimicrobial composition may further include polyethylene glycol having a weight average molecular weight of 200 to 800 g / mol in order to increase the solubility of zinc pyrithione, more preferably 300 to 600 g / mol polyethylene It may further comprise a glycol. By using polyethylene glycol having such a weight average molecular weight, it is possible to effectively dissolve zinc pyrithione to increase the content of zinc pyrithione in the antimicrobial composition, thereby securing excellent antimicrobial and antibacterial properties. .

The amount of the polyethylene glycol added is not particularly limited, but the antimicrobial composition may include 0.1 to 10 parts by weight of polyethylene glycol, and more preferably 3 to 8 parts by weight of polyethylene glycol, based on 100 parts by weight of the base resin. . In this range it is possible to effectively dissolve zinc pyrithione of the desired content.

In one embodiment of the present invention, the antimicrobial composition may further include a polyfunctional acrylate monomer to improve the adhesion between the wood and the coating film. More specifically, the multifunctional acrylate monomer may be one of 2 to 6 acrylate groups or methacrylate groups, and more specifically pentaerythritol triacrylate, pentaerythritol trimethacrylate, and pentaerythritol tetraacrylate. , Pentaerythritol tetramethacrylate, dipentaerythritol pentaacrylate, dipentaerythritol pentamethacrylate, dipentaerythritol hexaacrylate, dipentaerythritol hexamethacrylate, trimethylolpropane triacrylate and It may be any one or two or more selected from the group consisting of trimethylolpropane trimethacrylate and the like.

The amount of the multifunctional acrylate monomer added is not particularly limited, but the antimicrobial composition may include 0.1 to 20 parts by weight of the multifunctional acrylate monomer based on 100 parts by weight of the base resin, and more preferably, the multifunctional acrylate. It may include 3 to 10 parts by weight of the monomer. In such a range it is possible to effectively improve the coating property and adhesion when coating wood with an antimicrobial composition.

The antimicrobial composition may further include an organic acid. The organic acid is to increase the safety of the coating composition by forming a complex with zinc pyrithione, specific examples of the organic acid is formic acid, acetic acid, propionic acid, oxalic acid, succinic acid, benzoic acid, citric acid, maleic acid, malonic acid, malic acid, tartaric acid It may be any one or two or more selected from the group consisting of, gluconic acid, lactic acid, gestic acid, fumaric acid, lactobionic acid, salicylic acid, phthalic acid, embonic acid, aspartic acid and glutamic acid.

Although the addition amount of the organic acid is not particularly limited, the antimicrobial composition may include 0.05 to 3 parts by weight of an organic acid, and more preferably 0.1 to 1 part by weight of an organic acid, based on 100 parts by weight of the base resin. In this range it can effectively form a complex with zinc pyrithione, it may not inhibit the physical properties of the coating film.

In addition, the antimicrobial composition may further include a functional additive commonly added in the art, and the functional additive may be one or more selected from the group consisting of a dispersant, an antisettling agent, an antioxidant, an antifoaming agent, a flame retardant, and an ultraviolet stabilizer. have.

In addition, another aspect of the present invention relates to a method for manufacturing the wood furniture described above, in detail a) antibacterial comprising a base resin, surface-modified cellulose-based raw materials, metal oxide particles, zinc pyrithione and an organic solvent Preparing a composition; And b) processing wood with the antimicrobial composition.

First, a) a step of preparing an antimicrobial composition comprising a base resin, a surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione, and an organic solvent may be performed. At this time, since the components and the content in the antimicrobial composition are the same as described above, redundant description is omitted.

As described above, when the base resin, surface-modified cellulose-based raw material, metal oxide particles, zinc pyrithione and an organic solvent are prepared, they can be mixed homogeneously to prepare an antimicrobial composition. At this time, the antimicrobial composition is preferably to have a viscosity of 50 to 1000 cps at 25 ℃ based on the viscosity Brookshield viscometer, it may be mixed to have an appropriate viscosity according to the type and processing method of wood.

Next, once the antimicrobial composition is prepared, b) processing the wood with the antimicrobial composition can be performed.

The processing can be largely divided into three aspects, as a specific example, the first aspect is a process of coating the surface of the wood with an antimicrobial composition, the second aspect is the application of the antimicrobial composition on the wood laminated surface laminated a plurality of wood The process of producing wood plywood, the third aspect may be a process for rolling wood composite wood composition mixed with an antimicrobial composition, wood fibers, organic solvents and additives to produce a wood plastic composite material.

Wood processing according to the first aspect may comprise the step of coating wood with the antimicrobial composition. In this case, the wood may be a slab, formulation wood, aggregate wood, plywood, medium density fiberboard (MDF) or particle board (PB, particle board) and the like.

In one embodiment of the present invention, the coating may be carried out by a method commonly used in the art, and for example, the coating may be performed by one or more methods selected from the group consisting of spray coating, dip coating, bar coating, and the like. can do. The number of coatings is not particularly limited, and for example, the antimicrobial composition may be applied 1 to 5 times to form a coating layer on the surface of wood, and the coating layer may be coated to have a thickness of 0.5 to 30% of the thickness of the wood.

Thereafter, a drying step may be further performed, and the drying step may be performed at a temperature of 50 to 90 ° C. If it is less than 50 ℃ process time is too long to decrease the efficiency, if it exceeds 90 ℃ may cause distortion and cracking or carbonization of the coating film.

On the other hand, the wood according to the first aspect may be sand blasted to improve the coating properties and adhesion of the antimicrobial composition. As such, sandblasting can form irregularities on the surface of the wood, thereby greatly widening the specific surface area of the wood, and the coating film can be more firmly bonded to the wood by the anchoring effect when forming the coating film.

Wood processing according to the second aspect may include applying a antimicrobial composition to the wood laminated surface to produce a wood plywood by laminating a plurality of wood. In this case, the antimicrobial composition may serve as a binder while providing antimicrobial properties. Accordingly, in order to maximize the bonding property, the antimicrobial composition according to the second aspect may preferably use an acrylic resin, an urethane resin, or a mixture thereof having excellent adhesion to the base resin, and more preferably, an acrylic resin.

In addition, since the coating and drying method may be the same as in the first embodiment, redundant description is omitted.

Wood processing according to the third aspect may comprise the step of rolling molding a composite wood composition mixed with an antimicrobial composition, wood fibers, organic solvents and additives to produce a wood plastic composite (WPC). In this case, the antimicrobial composition may serve as a binder while providing antimicrobial properties.

As a specific example, the composite wood composition may include 20 to 50 parts by weight of wood fibers, 50 to 200 parts by weight of organic solvents and 0.5 to 5 parts by weight of additives based on 100 parts by weight of the antimicrobial composition.

The wood fiber may be the same as or different from the cellulose-based raw material, and specifically, may be any one or two or more selected from the group consisting of wood powder, bamboo flour, rice husk powder, cellulose powder, and the like. More specifically, the wood fibers may have an average particle diameter of 10 to 300 μm, and a length: diameter ratio of 1: 0.2 to 1 may be used.

The organic solvent may be a conventionally used organic solvent, specific examples include aliphatic hydrocarbons such as hexane and heptane; Aromatic hydrocarbons such as toluene and xylene; Alcohols such as methanol, ethanol, isopropanol, butanol and isobutanol; Ethers such as a cellulose unit and a butyl cellulose unit; Esters such as ethyl acetate, butyl acetate and amyl acetate; Ketones such as acetone, methyl ethyl ketone and methyl isobutyl ketone; Amides such as N-dimethylformamide and dimethylacetamide; It may be any one or two or more selected from the group consisting of, preferably aromatic hydrocarbons, alcohols or a mixed solvent thereof, but this is only one example, the present invention is not limited thereto, antimicrobial composition It may be the same as or different from the organic solvent contained in.

The additive may be any one or two or more selected from the group consisting of a dispersant, antisettling agent, antioxidant, antifoaming agent, flame retardant and ultraviolet stabilizer.

When the composite wood composition is prepared in the above-described composition and content, the composite wood composition is extruded using an extrusion molding machine at an extrusion rate of 170 to 190 ° C. and 100 to 150 rpm to produce wood plastic composite (WPC). Can be.

Hereinafter, the wood furniture excellent in the antimicrobial properties and a manufacturing method thereof according to the present invention through the embodiment will be described in more detail. However, the following examples are only one reference for describing the present invention in detail, but the present invention is not limited thereto and may be implemented in various forms.

Also, unless defined otherwise, all technical and scientific terms have the same meanings as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of effectively describing particular embodiments only and is not intended to be limiting of the invention. In addition, the unit of the additive which is not specifically described in the specification may be a weight%.

Example 1

1) Surface modification of wood powder: First, 20 parts by weight of wood powder was added to 100 parts by weight of 7% by weight of sodium hydroxide, followed by stirring for 60 minutes to pretreat the wood powder. The wood powder was surface-modified by mixing 25 parts by weight of pretreated wood flour with respect to 100 parts by weight of 3-aminopropyltrimethoxysilane solution (3% by weight in DMF) and stirring for 30 minutes. After the surface-modified wood powder was separated by filtration and hot air dried at 60 ℃ for 2 hours.

2) Copper nitrous oxide (Cu ₂ O) particle pretreatment: 10 parts by weight of cuprous oxide (average particle size 20 nm) and 5 parts by weight of ammonium phosphate were mixed with 100 parts by weight of dimethylformamide (DMF) and stirred for 30 minutes to form cuprous oxide particles. Was pretreated. Then, washed with distilled water and dried at 80 ℃ 12 hours.

3) Preparation of antimicrobial composition: 12 parts by weight of the surface-modified wood powder, 2.5 parts by weight of cuprous oxide particles, 1 part by weight of zinc pyrithione (ZnPy) based on 100 parts by weight of polybenzyl methacrylate resin (PBMA, product name NPR1520). And 100 parts by weight of DMF was mixed to prepare an antimicrobial composition.

Example 2

In the same manner as in Preparation Example 1, the surface-modified wood powder and cuprous oxide particles were prepared. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder, 2.5 parts by weight of cuprous oxide particles, 1 part by weight of zinc pyrithione, polyethylene glycol (PEG, weight average molecular weight 400 g / mol) 3 weight Part and 100 parts by weight of DMF were mixed to prepare an antimicrobial composition.

Example 3

In the same manner as in Preparation Example 1, the surface-modified wood powder and cuprous oxide particles were prepared. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder, 2.5 parts by weight of cuprous oxide particles, 1 part by weight of zinc pyrithione, 10 parts by weight of pentaerythritol triacrylate (PETTA) and DMF 100 Mixed by weight to prepare an antimicrobial composition.

Example 4

In the same manner as in Preparation Example 1, the surface-modified wood powder and cuprous oxide particles were prepared. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder, 2.5 parts by weight of cuprous oxide particles, 1 part by weight of zinc pyrithione, 0.5 parts by weight of citric acid (CA) and 100 parts by weight of DMF to antibacterial The composition was prepared.

Example 5

In the same manner as in Preparation Example 1, the surface-modified wood powder and cuprous oxide particles were prepared. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder, 2.5 parts by weight of cuprous oxide particles, 1 part by weight of zinc pyrithione, 3 parts by weight of PEG (weight average molecular weight 400 g / mol), PETTA An antimicrobial composition was prepared by mixing 10 parts by weight, 0.5 parts by weight of CA and 100 parts by weight of DMF.

Comparative Example 1

Wood-modified wood powder was prepared in the same manner as in Preparation Example 1. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder and 100 parts by weight of DMF were mixed to prepare an antimicrobial composition.

Comparative Example 2

In the same manner as in Preparation Example 1, the surface-modified wood powder and cuprous oxide particles were prepared. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder, 2.5 parts by weight of cuprous oxide particles, and 100 parts by weight of DMF were mixed to prepare an antimicrobial composition.

Comparative Example 3

Wood-modified wood powder was prepared in the same manner as in Preparation Example 1. Next, with respect to 100 parts by weight of PBMA resin, 12 parts by weight of the surface-modified wood powder, 1 part by weight of zinc pyrithione and 100 parts by weight of DMF were mixed to prepare an antimicrobial composition.

[Comparative Example 4]

Unlike the Preparation Example 1, all the processes except the surface-modified wood powder were used in the same manner as in Example 1 to prepare an antimicrobial composition.

[Characteristic evaluation]

1. Antimicrobial Evaluation

Antimicrobial activity was tested by KCL-FIR-1003: 2018 method. Specifically, Escherichia coli ( Eccherichia coli ATCC 8739) 3.7 × 10 ⁵ CFU / ㎖, Staphylococos aureus ATCC 6538P) inoculated at an initial concentration of 3.4 × 10 ⁵ CFU / ㎖, and left at 37.0 ± 0.2 ℃ for 24 hours After confirming the concentration (A) and bacterial reduction rate (B) , the results are shown in Table 1 below. As a control group, an untreated group was prepared.

Composition (parts by weight) Escherichia coli Staphylococcus aureus PBMA Wood powder Cu ₂ O ZnPy Additional ingredients A
(CFU / mL) B
(%) A
(CFU / mL) B
(%) Control - - - - - 9.5 × 10 ⁶ - 2.3 × 10 ⁶ - Example 1 100 12 2.5 One - Less than 10 99.999 Less than 10 99.999 Example 2 2.5 One PEG 3 Less than 10 99.999 Less than 10 99.999 Example 3 2.5 One PETTA 10 Less than 10 99.999 Less than 10 99.999 Example 4 2.5 One CA 0.5 Less than 10 99.999 Less than 10 99.999 Example 5 2.5 One PEG 3
PETTA 10
CA 0.5 Less than 10 99.999 Less than 10 99.999 Comparative Example 1 - - - 4.2 × 10 ⁶ - 1.0 × 10 ⁶ - Comparative Example 2 2.5 - - 5.8 × 10 ² 99.84 1.2 × 10 ³ 99.65 Comparative Example 3 - One - 3.3 × 10 ³ 99.11 3.9 × 10 ³ 98.85 Comparative Example 4 100 12
(Unmodified) 2.5 One - Less than 10 99.999 Less than 10 99.999

Through the antimicrobial evaluation, it was possible to confirm the excellent antimicrobial properties of the antimicrobial composition and the wood coated therewith. On the other hand, when no cuprous oxide or zinc pyrithione was added, there was an antibacterial effect, but the effect was inferior.

2. Evaluation of coating

1) Uniformity: The antimicrobial compositions of Preparation Examples 1 to 5 and Comparative Examples 1 to 3 prepared above were coated on wooden specimens to form a coating film, and the appearance after leaving for 24 hours was visually evaluated. The evaluation is poor when the coating film is raised or the orange peel phenomenon is severe (X), when the orange film phenomenon is weak on the coating film (△), when the appearance is good (○), and when the appearance is smooth and beautiful (◎) Was evaluated, and the results are shown in Table 2 below.

2) Adhesiveness: The antimicrobial compositions of Preparation Examples 1 to 5 and Comparative Preparation Examples 1 to 3 prepared above were coated on wooden specimens to form a coating film, and left for 24 hours. The coating film was drawn with 10 cutters each at 0.5 cm intervals using a cutter to draw 100 square cutting lines. The cutting line is deep enough to reach the wood specimen. Thereafter, cellophane tape (NICHIBAN, width 24 mm) was applied to the square cutting line, completely adhered, and then detached instantaneously. Thereafter, the number of square grids peeled off the surface of the coating layer was visually evaluated to evaluate adhesiveness, but less than 70 defects (X), and more than 70 or less than 90 adhesive (△), more than 90 or less than 95 adhesion When it was, it evaluated as good ((circle)), and when it adhered 95 or more, it was excellent ((◎)).

Composition (parts by weight) Coating PBMA Wood powder Cu ₂ O ZnPy Additional ingredients Uniformity Adhesive Example 1 100 12 2.5 One - ○ ○ Example 2 2.5 One PEG 3 ◎ ○ Example 3 2.5 One PETTA 10 ○ ◎ Example 4 2.5 One CA 0.5 ◎ ○ Example 5 2.5 One PEG 3
PETTA 10
CA 0.5 ◎ ◎ Comparative Example 1 - - - ○ ○ Comparative Example 2 2.5 - - ○ ○ Comparative Example 3 - One - ○ ○ Comparative Example 4 100 12
(Unmodified) 2.5 One - △ △

As shown in Table 2, the antimicrobial composition according to the present invention was excellent in coating uniformity and adhesion to wood. Particularly, in Examples 2 and 4 to which polyethylene glycol or citric acid was added, coating uniformity was further improved due to an increase in solubility in zinc pyrithione, and adhesion of Example 3 to which pentaerythritol triacrylate was added. Sex was further improved.

On the other hand, in the case of Comparative Example 4 in which the wood powder without modifying the surface was added as it was, the coating uniformity and the adhesiveness were not good because of the poor interconnection between the wood powder and the base resin (polybenzyl methacrylate resin).

Although the present invention has been described through the specific matters and the specific embodiments as described above, it is provided only to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention belongs to Those skilled in the art can make various modifications and variations from this description.

Accordingly, the spirit of the present invention should not be limited to the described embodiments, and all of the equivalents and equivalents of the claims, as well as the appended claims, will fall within the scope of the present invention. .

Claims (11)

5 to 15 parts by weight of surface-modified cellulose-based raw material, 1 to 3 parts by weight of metal oxide particles, 0.5 to 1.5 parts by weight of zinc pyrithione, and 100 to 150 parts by weight of an organic solvent, based on 100 parts by weight of the base resin, The metal oxide particles are wood furniture processed with an antimicrobial composition of copper oxide (I) (Cu 2 O), copper oxide (II) (CuO) or a mixture thereof. delete The method of claim 1,
The surface-modified cellulose-based raw material is a wooden furniture, in which the cellulose-based raw material is dispersed in a silane coupling agent. delete The method of claim 1,
The metal oxide particles have an average particle size of 1 nm to 50 ㎛, wooden furniture. The method of claim 1,
The antimicrobial composition further comprises a polyethylene glycol having a weight average molecular weight of 200 to 800 g / mol, wood furniture. The method of claim 6,
The antimicrobial composition is wooden furniture containing 0.1 to 10 parts by weight of polyethylene glycol based on 100 parts by weight of the base resin. The method of claim 1,
The antimicrobial composition is a wooden furniture further comprising a multifunctional acrylate monomer. The method of claim 8,
The antimicrobial composition is a wooden furniture comprising 0.1 to 20 parts by weight of a multifunctional acrylate monomer based on 100 parts by weight of the base resin. a) 5 to 15 parts by weight of surface-modified cellulose-based raw material, 1 to 3 parts by weight of metal oxide particles, 0.5 to 1.5 parts by weight of zinc pyrithione, and 100 to 150 parts by weight of organic solvent, based on 100 parts by weight of the base resin The metal oxide particles may include preparing an antimicrobial composition comprising copper oxide (I) (Cu 2 O), copper oxide (II) (CuO), or a mixture thereof; And
b) processing wood with the antimicrobial composition;
Method of manufacturing wooden furniture comprising a. The method of claim 10,
The wood is sand blasted, wood furniture manufacturing method.