KR102218903B1 - Urushiol modified wood composite and method for preparing the same - Google Patents

Abstract

The present invention relates to a wood composite with modified urushiol and a method for preparing the same. More particularly, the present invention relates to: a composition for preparing a wood composite, comprising a hydrophobic acrylic monomer, urushiol, wood flour and a thermoplastic polymer; a urushiol-modified wood composite containing the same; a method for preparing a urushiol-modified wood composite, comprising a step of obtaining an extrudate by extrusion molding, and a step of cutting the extrudate by cooling; and a urushiol-modified wood composite obtained therefrom. The wood composite has excellent thermal stability, water resistance and antiseptic properties.

Description

Urushiol-modified wood composite material and its manufacturing method TECHNICAL FIELD [URUSHIOL MODIFIED WOOD COMPOSITE AND METHOD FOR PREPARING THE SAME}

The present invention relates to a wood composite material modified with urushiol and a method for producing the same, and more particularly, to a wood composite material having improved flame retardancy and hydrophobicity, and a method for producing the same.

Sumac tree (Rhus verniciflua or Rhus vernicifera ) is a deciduous arboreous tree belonging to the Anacardiaceae family, and is native to the Central Asian highlands and the Himalayas, and is currently widely distributed in subtropical and temperate regions, mainly in tropical regions around the world, and is widely distributed in Korea, China, and Japan. In East Asia, it is used as a natural paint for crafts and household goods. Raw lacquer or lacquer liquid collected from lacquer is composed of urushiol, moisture, rubber, lacase, and nitrogen-containing substances, of which urushiol is the main component that accounts for about 70% of the lacquer liquid, C ₁₅ -alkyl or alkenyl It is a complex of 3-substituted catechols having a group, its main component is 3-(8'Z, 11'E, 13'Z-pentadecatrienyl)catechol (3-(8 'Z, 11'E, 13'Z-pentadecatrienyl)catechol). Until now _{, 13 components of 3-substituted alkylcatechol having 0, 1, 2 or 3 double bonds in the C 15} side chain have been identified (Yumin Du and Ryuichi Oshima, J. of Chromatography, 284, 463-473 (1984)). ), urushiol is a mixture of these monomers and polymers in which the monomers are naturally polymerized by LaCase.

Urushiol, a major constituent of lacquer, was initially reported to cause an allergic reaction, but afterwards, strong antioxidant, antibacterial, waterproof, chemical resistance, insect repellent, and antiseptic effects were found, so the durability of lacquer was chemically proven. Became. In addition, urushiol showed the potential as an anticancer agent by selectively killing only cancer cells without significantly affecting normal cells. Based on these basic effects, studies on effective and various extraction methods or practical applications of urushiol are being conducted.

On the other hand, wood flour plastic, an eco-friendly, low-carbon new material, is easy to extrude and injection molding by combining natural material, wood flour, and olefin-based thermoplastic polymer resin that is harmless to the human body through a special kneading process. It is an eco-friendly material that is 100% recyclable and has advantages such as luxurious natural texture of wood, durability of polymer resin, water resistance, and molding processability. However, during extrusion and injection molding, carbonization of wood powder with low thermal stability occurs, mechanical properties are generated due to weakened interfacial adhesion between plastic and wood powder during the cooling process of molded products, and antiseptic properties are reduced due to increased moisture content of wood powder due to hydrophilicity. There is this. In order to overcome this problem, problems such as environmental hormone problems have occurred due to the use of chemical additives such as highly toxic flame retardants, preservatives, and flame retardants.

Recently, urushiol, a major constituent of lacquer, has antioxidant and antibacterial effects, and is known to have chemical resistance. As in Korean Patent No. 0842032, a technology related to a sealant containing lacquer is known, but the modification of urushiol Since the application studies related to this are insignificant, it is expected that when a synthetic wood having improved flame retardancy and hydrophobicity is developed using the properties of urushiol, it can be applied in various ways.

Accordingly, one aspect of the present invention is to provide a composition for manufacturing a wood composite material modified with urushiol having improved flame retardancy and hydrophobicity.

Another aspect of the present invention is to provide a wood composite comprising the composition for manufacturing the wood composite.

Another aspect of the present invention is to provide a method of manufacturing a wood composite material modified with urushiol having improved flame retardancy and hydrophobicity.

Another aspect of the present invention is to provide a wood composite material produced by the method for producing a wood composite material modified with urushiol of the present invention.

According to one aspect of the present invention, a composition for manufacturing a wood composite material is provided, comprising a hydrophobic acrylic monomer, urushiol, wood powder and a thermoplastic polymer.

According to another aspect of the present invention, there is provided a wood composite material modified with urushiol, comprising the composition for manufacturing a wood composite material of the present invention.

According to another aspect of the present invention, obtaining an extrudate by extrusion molding the composition for producing a composite of the present invention; And there is provided a method for producing a wood composite material modified with urushiol comprising the step of cooling the extrudate to cut.

According to another aspect of the present invention, there is provided a wood composite material modified with urushiol produced by the method for producing a wood composite material modified with urushiol of the present invention.

According to the present invention, a wood composite with improved flame retardancy and hydrophobicity can be obtained by preparing a wood composite by combining urushiol and a specific type of acrylic monomer, and adjusting the degree of grafting according to the radiation dose. The obtained wood composite has excellent thermal safety, waterproof and antiseptic properties of the wood composite, and the interfacial adhesion between wood powder and polymer is improved.

1 schematically shows a process for manufacturing a wood composite material modified with urushiol according to the present invention.
Figure 2 (a) shows the chemical structure analysis result of the unmodified wood powder plastic surface using a total reflection infrared spectrophotometer (ATR-FTIR, Attenuated Total Reflectance-Fourier Transform Infrared spectrophotometry), (b) is a comparative example It shows the results of chemical structure analysis on the surface of the wood powder plastic modified with urushiol and acrylate monomers of the wood composites obtained in 1 to 6.
3 shows the chemical structure analysis results of the surface of the wood powder plastic modified with urushiol having different viscosities and a hydrophobic acrylic monomer for Example 1, Example 2, and Comparative Example 6.
Figure 4 (a) is a photo of the wood composite material manufactured by Comparative Example 7, Figure 4 (b) shows a photo of the wood composite material manufactured by Example 1.
Figure 5 shows the cross-sectional structure and surface structure of the wood composites obtained in Examples 1, 2, Comparative Example 6 and Comparative Example 7.
6 shows the results of confirming the thermal properties of the wood composites obtained in Examples 1, 2, 6 and 7 using a thermogravimetric analysis (TGA) device.
FIG. 7 shows a photograph of a wood composite material obtained in Example 1 and Comparative Example 7 in which water was mixed with water to evaluate hydrophilicity with the naked eye.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below.

According to the present invention, carbonization of wood powder having low thermal stability during extrusion or injection molding processing is reduced, interfacial adhesion between plastic and wood powder is maintained even during cooling of molded products, and wood with improved antiseptic properties and durability due to excellent hydrophobicity There is provided a composition for producing a wood composite material capable of producing a composite material.

The composition for manufacturing a wood composite of the present invention includes a hydrophobic acrylic monomer, urushiol, wood powder, and a thermoplastic polymer. In particular, urushiol used in the present invention has a viscosity of 200 cp to 100,000 cp, preferably 500 cp to 90,000 cp, more preferably 10000 cp to 90,000 cp, for example 74,000 cp, and a high molecular weight having such a viscosity Excellent thermal stability can be obtained by using urushiol of.

The hydrophobic acrylic monomer is preferably a mixture of a monofunctional acrylic monomer and a trifunctional acrylic monomer.

For example, the monofunctional acrylic monomer is 3- (trimethoxysilyl) propyl methacrylate (TMPMA), 2-dimethylamino) ethyl methacrylate (DMEMA), 3- (trimethoxysilyl )Propylacrylate, 3-(chlorodimethylsilyl)propylmethacrylate, 3-[diethoxy(methyl)silyl]propylmethacrylate, 3-[dimethoxy(methyl)silyl]propylacrylate, [dimethoxy( Methyl)silyl]methylmethacrylate, 3-[tris(trimethylsilyloxy)silyl]propylmethacrylate, 3-[dimethoxy(methyl)silyl]propylmethacrylate, 3-(methoxydimethylsilyl)propylacrylic Rate, 3-(triethoxysilyl)propyl methacrylate, 3-(triallylsilyl)propylacrylate, 3-(triallylsilyl)propylmethacrylate, (triethoxysilyl)methylmethacrylate, and It may be at least one selected from the group consisting of dipentaerythritol hexaacrylate (DPEHA), but is not limited thereto, and is preferably TMPMA (3-(Trimethoxysilyl)propyl methacrylate).

The trifunctional acrylic monomer is trimethylolpropane trimethacrylate (TMPTMA), glycerol trimethacrylate (GTMA), 1,6-hexanediol dimethacrylate, 4,4'-isopropylidenedi Phenol dimethacrylate, neopentyl glycol dimethacrylate, neopentyl glycol diacrylate, nonamethylene glycol dimethacrylate, pentaerythritol tetraacrylate, tris(2-acryloyloxyethyl)isocyanu It may be at least one selected from the group consisting of a rate, but is not limited thereto, and is preferably TMPTMA (Trimethylolpropane trimethacrylate).

When the hydrophobic acrylic monomer includes a mixture of a monofunctional acrylic monomer and a trifunctional acrylic monomer, when irradiating radiation to the composition for manufacturing a wood composite of the present invention, as shown at the bottom of FIG. Urushiol, wood flour, a thermoplastic polymer, and a monofunctional acrylic monomer are combined around a trifunctional acrylic monomer to form the wood composite material of the present invention, and excellent flame retardancy, durability and hydrophobicity can be expressed.

Meanwhile, urushiol, a monofunctional acrylic monomer, and a trifunctional acrylic monomer are preferably included in a weight ratio of 2:2:1 to 16. If urushiol is less than the above range, there is a problem in that the content of urushiol in the wood powder plastic is low, so that sufficient improvement in thermal properties is not obtained, and if it exceeds the above range, urushiol and 1 There is a problem in that the crosslinking ratio with the functional and/or trifunctional acrylic monomers is increased, so that the molding processability is deteriorated, and the viscosity is increased due to the increase in urushiol content, so that when mixing with the acrylite monomer, it is mixed unevenly; 1 If the functional acrylic monomer is less than the above range, there is no effect on the improvement of the bonding strength between the hydrophilic wood powder and the hydrophobic plastic due to the low hydrophobicity of the wood powder plastic, and the relative content of urushiol decreases, so polymerization between urushiol does not occur. There is a problem in that it is difficult to obtain the graft modification, and when it exceeds the above range, there is a problem in that physical property improvement such as sufficient thermal property increase is not obtained because the relative content of urushiol is lowered; When the 3-functional acrylic monomer is less than the above range, polymerization between urushiol does not occur, and thus it is difficult to obtain graft modification.When it exceeds the above range, the crosslinking rate between urushiol and monofunctional acrylic monomer increases. There is a problem of poor molding processability.

The urushiol has a viscosity of 200 cp to 100,000 cp, preferably 500 cp to 90,000 cp, more preferably 10000 cp to 90,000 cp, for example 74,000 cp, using a low molecular weight urushiol having a viscosity less than the above range. In this case, there is a problem of insufficient thermal stability, and when using a low molecular weight urushiol whose viscosity exceeds the above range, the viscosity of urushiol increases, and thus there is a problem that it is mixed unevenly when mixed with an acrylite-based monomer.

The thermoplastic polymer that can be used in the present invention may be at least one selected from the group consisting of polypropylene, polyvinyl chloride, polystyrene, polyethylene, polyester, polylactic acid, polyglycol acid, polycaprolactone, and acrylic, for example For example, polypropylene may be used, but is not limited thereto.

Furthermore, the thermoplastic resin that can be used in the present invention includes a biodegradable resin. In addition, one or more of the thermoplastic resins mentioned above and one or more of the biodegradable resins mentioned below may be mixed and used.

The biodegradable resin that can be used in the present invention may be, for example, a bioplastic, and more specifically, as a natural polymer made in nature, polysaccharide, starch, gum, pectin, natural rubber ( natural rubber), lignocellulose, cellulose, hemicellulose, etc.; As a bio-based polymer prepared by polymerizing a biomass-based monomer, polylactic acid (PLA), polyglycolic acid (PGA), polyhydroxy alkanoate (PHA), and the like; Biodegradable polymer polymerized with petroleum-based monomers, polyhydroxy butyrate (PHB), polycaprolactone (PCL), polybutylene succinate (PBS), poly-β-hydroxybutyrate (PHB), and poly-β-hydroxy Valerate (PHV), polybutylene adipate terephthalate (PBAT), polytrimethylene terephthalate (PTT), and the like, and the thermoplastic resin of the present invention may use at least one of these.

The composition for manufacturing a wood composite material of the present invention may further include an organic solvent, wherein the organic solvent may be alcohol, for example, methanol, ethanol, butanol, etc., but is not limited thereto, and preferably ethanol Use.

According to the present invention, there is provided a wood composite material modified with urushiol comprising the composition for manufacturing a wood composite material of the present invention described above, wherein the wood composite material may be, for example, a master batch.

According to the present invention, a method for manufacturing a wood composite material modified with urushiol is provided, and in more detail, the method for manufacturing a wood composite material modified with urushiol of the present invention includes the steps of extruding the composition for manufacturing a wood composite material of the present invention to obtain an extrudate. ; And cooling and cutting the extrudate.

In the step of obtaining an extrudate by extrusion molding the composition for manufacturing a wood composite material of the present invention described above, the extrusion is interpreted as including injection molding, and is preferably performed at a temperature of 180 to 230°C, and more preferably Is performed at a temperature of 180 to 220°C. When the extrusion molding temperature is less than 180° C., smooth molding tends to be difficult due to insufficient fluidity, and when it exceeds 230° C., carbonization may occur.

When the extrudate is produced by extrusion molding, the step of cooling and cutting the extrudate is subsequently performed. In this case, the cooling method may be, for example, natural cooling or cooling by cooling water, but is not particularly limited thereto.

However, the cooling is preferably performed at a temperature of 40 to 80°C, preferably 40 to 70°C, and when cutting is performed at less than 40°C, cutting is smoothly performed due to excessive strength. There is a problem that is difficult to do, and when it is performed at more than 80°C, the viscosity increases, so that the cutting is not performed cleanly, and there is a problem that the cutting is stuck to the cutter.

Subsequently, the step of irradiating the cut extrudate obtained as above with radiation of 5 to 100 kGy is further performed, wherein the radiation dose is, for example, 10 to 75 kGy, preferably 10 to 50 kGy. will be.

When the radiation dose is less than 5 kGy, the bonding between the components of the composition for manufacturing wood composites tends to be insufficient, and when the radiation dose is more than 100 kGy, the crosslinking rate of urushiol and acrylite-based monomers increases, making extrusion and injection molding impossible. There is.

In this case, the radiation may be selected from the group consisting of gamma rays, electron rays, ultraviolet rays, and X rays, and electron rays are preferably used.

According to the present invention, the urushiol-modified wood composite material produced by the method for producing a wood composite material modified with urushiol of the present invention as described above can be obtained, and the wood composite obtained by the present invention is It has excellent thermal safety, waterproof and antiseptic properties, and improved interfacial adhesion between wood powder and polymer.

Hereinafter, the present invention will be described in more detail through specific examples. The following examples are only examples to aid understanding of the present invention, and the scope of the present invention is not limited thereto.

Example

1. Manufacturing of wood composites

Comparative example One

Wood flour in a solution in which 5 wt% of TMPMA (3-(trimethoxysilyl) propyl methacrylate), 40 wt% of TMPTMA (trimethyllopropane trimethacrylate, and 5 wt% of low-viscosity urushiol with a viscosity of 151 cp were dissolved in ethanol, respectively) 400 g was soaked in. 40 g of wood flour in which the Uru- TMPMA- TMPTMA mixture solution was immersed and 100 g of thermoplastic polymer polypropylene (PP) were mixed at 200 to 600 rpm while maintaining the temperature of a blender (Brabender, Lab-station) of 20 to 40°C. The mixture was mixed for 10 to 60 minutes so that it was well mixed in and stirred until the ethanol disappeared After confirming the ethanol evaporation, the temperature of the blender was maintained at 180 to 230°C, while extrusion molding (extrusion molding is possible in the blender), and continuous extrusion During the process, cutting into 2 mm to 6 mm length and 2 mm to 4 mm diameter at a temperature of 40 to 80°C to obtain a cylindrical master batch pellet shape having a length of about 5 mm.

After 100 g of the master batch pellets obtained above were packaged in a wrapping paper made of paper, a final wood composite was prepared by irradiating an electron beam of 50 kGy within 1 kGy.

The wood composite manufacturing process of the present invention is schematically illustrated in FIG. 1.

Comparative example 2

5 wt% of TMPMA (3-(trimethoxysilyl) propyl methacrylate), 10 wt% of TMPTMA (trimethyllopropane trimethacrylate, and 5 wt% of low-viscosity urushiol having a viscosity of 151 cp were dissolved in ethanol, respectively. Except for that, a wood composite was manufactured by the same procedure as in Comparative Example 1.

Comparative example 3

A wood composite was prepared by the same procedure as in Comparative Example 1, except that TMPMA (3- (trimethoxysilyl) propyl methacrylate) and TMPTMA (trimethyllopropane trimethacrylate) were not used.

Comparative example 4

A wood composite was prepared in the same manner as in Comparative Example 1, except that TMPTMA (trimethyllopropane trimethacrylate) and urushiol were not used.

Comparative example 5

A wood composite was prepared by the same procedure as in Comparative Example 1, except that TMPMA (3- (trimethoxysilyl) propyl methacrylate) and urushiol were not used.

Comparative example 6

A wood composite was manufactured by the same procedure as in Comparative Example 1, except that TMPTMA (trimethyllopropane trimethacrylate) was not used.

Comparative example 7

A wood composite was prepared by the same procedure as in Comparative Example 1, except that TMPMA (3- (trimethoxysilyl) propyl methacrylate), TMPTMA (trimethyllopropane trimethacrylate), and urushiol were not included.

Example One

A wood composite was manufactured by the same procedure as in Comparative Example 2, except that urushiol having a viscosity of 74,000 cp was used.

A photograph of the thus obtained wood composite is shown in Fig. 4(b), and Fig. 4(a) shows a picture of the wood composite manufactured by Comparative Example 7 for comparison.

Example 2

A wood composite was manufactured by the same procedure as in Comparative Example 2, except that urushiol having a viscosity of 783 cp was used.

2. Evaluation of the characteristics of the master batch

(1) Chemical structure analysis

Chemical structure analysis of the wood composites obtained in Comparative Examples 1 to 6 was performed by extrusion molding at 180 to 230°C using a total reflection infrared spectrometer (TENSOR 37 Spectrophotometer BRUKER) device.

2(a) shows the chemical structure result of the surface of a wood composite material in which only polypropylene and wood powder are mixed, and it can be seen that the hydroxyl group (OH-) group of wood having the hydrophilicity of the composite material exists. The hydrosyl group (-OH) peak in the cellulose molecular structure having a hydrophilic group of unmodified wood flour is 3000 ~ 3600 cm ^{- 1} .

2(b) shows the results of the chemical structure of the surface of the wood composite material obtained in Comparative Examples 1 to 6, and it was confirmed that the hydrosyl group (-OH) peak disappeared in the wood flour surface-treated with an acrylate-based monomer.

On the other hand, Figure 3 shows the chemical structure results of the wood composites obtained in Examples 1, 2, Comparative Example 2 and Comparative Example 7, as in Comparative Example 7, the chemical structure results of the surface of the wood composite only mixed with polypropylene and wood powder It can be seen that contains a hydroxyl group (OH-) group of wood having hydrophilicity. In general, the hydrosyl group (-OH) peak, which is a peculiar peak in the dry urushiol stock solution without irradiation, is 3000~3600 cm ^-1 , the =CH- peak of the unstaturated alkyl group is 3012 and 1626 cm ^-1 The benzene ring peak is 1580 cm ^-1 , the -CH ₂ peak of the saturated alkyl group is 2920 and 2854 cm ^-1 , and the C=C peak ^{appears at 1621 ~ 1629 cm -1} , as a result of which urushiol It can be seen that silver forms a catechol structure having a saturated alkyl group and an unsaturated alkyl group. However, as the viscosity of urushiol increases, the hydroxyl group (OH-) group decreases, so it can be seen that the hydroxyl group of wood flour and the chemical bond between urushiol and acrylate resin increase.

(2) surface structure analysis

In Example 1, Example 2, Comparative Example 2 and Comparative Example 7 by extrusion molding at 180 to 230°C using a scanning electron microscope (FE-SEM, Scanning Electron Microscopy, Hitachi S-4800, Japan) device The surface structure analysis of the obtained wood composite was performed.

The difference between the surface and the cross-section of the unmodified wood composite and the modified wood composite with urushiol and acrylate monomers was confirmed. This is because urushiol and acrylate monomers were grafted to the -OH group of wood powder by radiation. It was confirmed that this was due to the formation of a polymer as polymerization occurred, and the surface and cross-section became thicker. On the other hand, in the case of crosslinking wood powder with a mixed solution of urushiol and acrylate, it was observed that both before and after the crosslinking treatment had a smooth surface. The reason for having such a smooth surface can be inferred that polyurushiol was synthesized due to polymerization of a monomer and urushiol at the same time as the surface treatment of wood flour upon irradiation with radiation, and polyurushiol was modified in wood flour.

As a result of confirming the surface structure of the modified wood composite, as shown in FIG. 5, in the case of Comparative Example 7 in which urushiol was not used, it was possible to confirm the rough side by mixing with polypropylene and wood powder on the surface of the wood composite material, and the viscosity of urushiol was high. In the case of Example 1, it was confirmed that the crosslinked part of the surface and cross section of the wood composite material crosslinked with urushiol and acrylate became thick. On the other hand, in the case of Examples 2 and 3, it was confirmed that the amount of crosslinked acrylate monomer and urushiol decreased as the viscosity of urushiol decreased.

As a result, in the case of Comparative Example 7 and Comparative Example 2, when urushiol of low viscosity was added, the amount of crosslinking between urushiol and acrylate was reduced, and it was considered that it would be difficult to improve the thermal stability and hydrophobicity of the wood composite. In this case, it can be inferred that as the viscosity of urushiol increases, polyurushiol is synthesized due to polymerization of a monomer and urushiol, and polyurushiol is more modified in wood flour. In conclusion, when polyurushiol is synthesized by electron beams inside a wood composite, as the viscosity of urushiol increases, the crosslinking rate of the polyurushiol increases, so that the heat safety and hydrophobicity of the wood composite are expected to be improved.

(3) Analysis of thermal properties

Wood composites obtained in Examples 1, 2, 2, and 7 by extrusion molding at 180 to 230°C using a Thermo Gravimetric Analysis D-TGA (SDT 2960) TA Instruments (TGA) device The thermal property analysis of was performed.

As a result, referring to FIG. 6, it can be seen that the thermal characteristics of the wood composite material belonging to the present invention are excellent throughout the high temperature. It was confirmed that the thermal stability of the acrylate and urushiol-modified wood composites increased compared to the unmodified wood composites, and in particular, it was confirmed that the thermal stability improved as the viscosity of urushiol increased. It is thought that polyurushiol synthesized with acrylate monomer was increased in

(3) hydrophilicity evaluation

The wood composites obtained in Example 1 and Comparative Example 7 were mixed with water to evaluate the hydrophilicity with the naked eye.

As a result, as can be seen in Figure 7, it can be seen that the wood composite material according to the present invention exhibits excellent hydrophobicity.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and variations are possible without departing from the technical spirit of the present invention described in the claims. It will be obvious to those of ordinary skill in the field.

Claims (17)

A hydrophobic acrylic monomer which is a mixture of a monofunctional acrylic monomer and a trifunctional acrylic monomer; A composition for manufacturing a wood composite, comprising urushiol, wood powder and a thermoplastic polymer.
delete The method of claim 1, wherein the monofunctional acrylic monomer is 3- (trimethoxysilyl) propyl methacrylate (TMPMA), 2-dimethylamino) ethyl methacrylate (DMEMA), 3- (trimethoxy Silyl)propylacrylate, 3-(chlorodimethylsilyl)propylmethacrylate, 3-[diethoxy(methyl)silyl]propylmethacrylate, 3-[dimethoxy(methyl)silyl]propylacrylate, [dimethoxy (Methyl)silyl]methylmethacrylate, 3-[tris(trimethylsilyloxy)silyl]propylmethacrylate, 3-[dimethoxy(methyl)silyl]propylmethacrylate, 3-(methoxydimethylsilyl)propyl Acrylate, 3-(triethoxysilyl)propyl methacrylate, 3-(triallylsilyl)propyl acrylate, 3-(triallylsilyl)propyl methacrylate, (triethoxysilyl) methyl methacrylate And dipentaerythritol hexaacrylate (DPEHA) is at least one selected from the group consisting of, a composition for producing a wood composite.
The method of claim 1, wherein the trifunctional acrylic monomer is trimethylolpropane trimethacrylate (TMPTMA), glycerol trimethacrylate (GTMA), 1,6-hexanediol dimethacrylate, 4,4' -Isopropylidenediphenol dimethacrylate, neopentyl glycol dimethacrylate, neopentyl glycol diacrylate, nonamethylene glycol dimethacrylate, pentaerythritol tetraacrylate, tris(2-acryloyloxy) Ethyl) is at least one selected from the group consisting of isocyanurate, a composition for producing a wood composite.
According to claim 1, The thermoplastic polymer is a natural polymer polysaccharide (polysaccharide), starch (starch), gum (gum), pectin, natural rubber (natural rubber), lignocellulose, cellulose, hemicellulose; As a bio-based polymer prepared by polymerizing a biomass-based monomer, polylactic acid (PLA), polyglycolic acid (PGA), polyhydroxy alkanoate (PHA); Biodegradable polymer polymerized with petroleum-based monomers, polyhydroxy butyrate (PHB), polycaprolactone (PCL), polybutylene succinate (PBS), poly-β-hydroxybutyrate (PHB), and poly-β-hydroxy Valerate (PHV), polybutylene adipate terephthalate (PBAT) and at least one selected from the group consisting of polytrimethylene terephthalate (PTT), a composition for manufacturing a wood composite.
The composition according to claim 1, wherein the weight ratio of urushiol: 1 functional acrylic monomer: 3 functional acrylic monomer is 2:2:1 to 16.
The method of claim 1, wherein the thermoplastic polymer is at least one selected from the group consisting of polypropylene, polyvinyl chloride, polystyrene, polyethylene, polyester, polylactic acid, polyglycol acid, polycaprolactone, and acrylic. Composition.
The composition for manufacturing a wood composite according to claim 1, further comprising an organic solvent.
The composition of claim 8, wherein the organic solvent is alcohol.
Any one of claims 1 and 3 to claim 9, comprising the composition for manufacturing a wood composite, urushiol-modified wood composite.
The wood composite material of Clause 10 is a wood composite material modified with urushiol, which is a master batch.
Extruding the composition for producing a wood composite according to any one of claims 1 and 3 to 9 to obtain an extrudate; And
A method for producing a wood composite material modified with urushiol, comprising the step of cooling and cutting the extrudate.
The method of claim 12, wherein the extrusion is performed at a temperature of 180 to 230°C.
The method of claim 12, wherein the cooling is performed at a temperature of 40 to 80°C.
The method of claim 12, further comprising irradiating the cut extrudate with radiation of 5 to 100 kGy.
The method of claim 15, wherein the radiation is selected from the group consisting of gamma rays, electron rays, ultraviolet rays, and X-rays.
A wood composite material modified with urushiol, produced by the method for manufacturing a wood composite material modified with urushiol of claim 12.

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