KR102318955B1 - Manufacturing method of fluorescence epoxy transparent wood and fluorescence epoxy transparent wood manufactured therefrom - Google Patents

Abstract

The transparent epoxy wood manufacturing method according to the present invention comprises a first step of treating wood with a treatment solution containing a base and a sulfite; a second step of treating the treated wood with the treatment solution with hydrogen peroxide; a third step of impregnating the wood treated with the hydrogen peroxide solution into an epoxy resin composition containing quantum dots; and a fourth step of curing the epoxy resin composition.

Description

Fluorescent epoxy transparent wood manufacturing method and fluorescent epoxy transparent wood manufactured therefrom

The present invention relates to a method for manufacturing a fluorescent epoxy transparent wood and to a fluorescent epoxy transparent wood prepared therefrom.

Wood is a natural material that has been used for a long time and is one of the widely used materials because it has a characteristic structure including cellulose, which is the basic skeleton. In particular, most woods contain vertically aligned tubular structures to transport water and nutrients from the wood, through which water, ions and other components are transported.

These woods mainly contain cellulose, hemicellulose and lignin. Cellulose and hemicellulose are arranged in a tube shape in the longitudinal direction of the wood, and the average diameter of these tubes may vary depending on the type of wood and the size of the wood. Lignin is distributed between the cellulose tubes aligned in this way, and wood is strengthened by lignin, and studies are being actively conducted to utilize the cellulose structure of such wood.

Republic of Korea Patent Publication No. 10-2017-0042349

An object of the present invention is to provide a fluorescent transparent wood excellent in light transmittance.

Another object of the present invention is to provide a fluorescent transparent wood excellent in physical properties such as tensile strength.

Another object of the present invention is to provide a fluorescent transparent wood that emits light of a specific wavelength when irradiated with light, including quantum dots.

Fluorescent epoxy transparent wood manufacturing method according to the present invention comprises a first step of treating wood with a treatment solution containing a base and a sulfite;

a second step of treating the treated wood with the treatment solution with hydrogen peroxide;

a third step of impregnating the wood treated with the hydrogen peroxide solution into an epoxy resin composition containing quantum dots; and

and a fourth step of curing the epoxy resin composition.

In the method for manufacturing a fluorescent epoxy transparent wood according to an embodiment of the present invention, a weight ratio of hydrogen peroxide: water contained in the aqueous hydrogen peroxide solution may be 1:1 to 5.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the weight ratio of wood:epoxy resin in the fluorescent epoxy transparent wood may be 1:3 to 7.

In the method for manufacturing a fluorescent epoxy transparent wood according to an embodiment of the present invention, the molar ratio of the sulfite to the base may be 1:3 to 10.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the first step may be performed for 1 to 60 hours.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the fluorescent epoxy transparent wood may have a light transmittance of 80% or more in a wavelength range of 300 to 800 nm.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the fluorescent epoxy transparent wood may have a tensile strength of 17 MPa or more.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the quantum dots are graphene, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe , HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeTe, CdHgSTe, HgSeTe, CdHgSTe, HgSeTES, CdHgSTe AlP, AlAs, InN, InP, InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, InAlPAs, MoS ₂ , WS ₂ , MoSe ₂ , MoTe ₂ , TaSe ₂ , NbSe ₂ , NiTe ₂ , BN, Bi ₂ Te ₃ and quantum dots in which they are stacked in a core-shell form or quantum dots in which one or more two-dimensional materials are mixed It can be one or two or more have.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the epoxy resin composition is a bisphenol A type epoxy resin, a bisphenol A type novolac epoxy resin, a phenol novolac epoxy resin, a tetrafunctional epoxy resin, a biphenyl type epoxy Resin, triphenol methane-type epoxy resin, alkyl-modified triphenol methane epoxy resin, naphthalene-type epoxy resin, dicyclopentadiene-type epoxy resin, cresol novolac epoxy resin, dicyclopentadiene-modified phenol-type epoxy resin, and urethane-modified epoxy resin It may include one or two or more selected from.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the epoxy resin may have an epoxy equivalent of 180 to 200 g/eq.

The present invention also provides a fluorescent epoxy transparent wood, and the fluorescent epoxy transparent wood according to the present invention may be manufactured by the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention.

Fluorescent epoxy transparent wood manufacturing method according to the present invention can exhibit high transparency by treating hydrogen peroxide after treatment with base and sulfite to remove lignin from wood, and shows excellent tensile strength by filling and curing epoxy containing quantum dots , there is an advantage in that it is possible to manufacture a fluorescent transparent wood that emits a specific wavelength when irradiated with light.

1 is a view showing and visually observing the shape change of the wood according to the manufacturing process of the transparent wood.
2 is a view showing the results of observing the transparent wood manufactured according to the embodiment of the present invention by SEM.
Figure 3 is a view of the wood and the transparent wood produced by the preparation example of the present invention is observed with the naked eye.
4 is a view showing the observation with the naked eye after irradiating ultraviolet light to the wood and the transparent wood that does not contain quantum dots of FIG. 3 .
Figure 5 shows the results of irradiating ultraviolet rays to the transparent wood prepared according to the embodiment of the present invention and observed with the naked eye.

Advantages and features of embodiments of the present invention, and methods of achieving them, will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

Fluorescent epoxy transparent wood manufacturing method according to the present invention comprises a first step of impregnating the wood in a solution containing a base and a sulfite;

After the first step, a second step of impregnating the wood in an aqueous hydrogen peroxide solution;

a third step of impregnating the wood treated with the hydrogen peroxide solution into an epoxy resin composition containing quantum dots; and

and a fourth step of curing the epoxy resin composition.

Fluorescent epoxy transparent wood according to the present invention can produce a fluorescent transparent wood excellent in tensile strength and high in transparency by including the above steps, and the epoxy resin composition contains quantum dots, so that the produced transparent wood contains ultraviolet rays, etc. When irradiating light, there is an advantage in that light of a specific wavelength can be emitted.

In the fluorescent epoxy transparent wood manufacturing method according to the present invention, lignin is removed from the wood through the treatment process of the first and second steps, and only the cellulose structure remains while the lignin is removed from the wood. By filling and curing an epoxy resin composition, it is possible to manufacture a fluorescent epoxy transparent wood with excellent mechanical strength. Specifically, by filling the cellulose structure with an epoxy resin, there is an advantage in that the tensile strength is enhanced as well as elasticity due to the cellulose structure.

Specifically, the first step includes a first step of treating the wood with a treatment solution containing a base and a sulfite. In this case, if the base is a water-soluble base, it can be used without limitation, and specifically, sodium hydroxide, potassium hydroxide, etc. can be used, but the present invention is not limited thereto. In addition, if the sulfite is also water-soluble, it can be used without limitation, and sodium sulfite or potassium sulfite can be preferably used, but the present invention is not limited thereto.

The molar ratio of sulfite to base in the treatment solution may be 1: 3 to 10, specifically 1: 4 to 8. In addition, the concentration of the sulfite may be 0.1 to 1 mol/L, and by satisfying the molar ratio of the sulfite:base and the concentration of the sulfite, it is possible to maximize the lignin removal efficiency to prevent a decrease in transparency.

In addition, the first step may be performed at 90 to 110 ° C. conditions to remarkably improve the lignin removal efficiency and to prevent the problem of causing damage to cellulose by using a treatment solution under excessively severe conditions, and for 12 to 60 hours It can be carried out as a method of impregnating the wood in the treatment solution during the.

The fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention may further include a washing step of removing the base and sulfite remaining in the wood after the first step. By going through this washing step, it is possible to prevent the effect on the hydrogen peroxide treatment in the second step and remove the residual lignin together. In this case, the washing may be performed 1 to 10 times using distilled water or alcohol having 1 to 3 carbon atoms, but the last washing before performing the second step may be washed using distilled water.

The fluorescent epoxy transparent wood manufacturing method according to the present invention includes a second step of treating the wood treated with the treatment solution with hydrogen peroxide. By including this second step, it is possible to remove residual lignin, and to significantly improve the transparency of the transparent wood finally produced through the bleaching action. In this case, the weight ratio of hydrogen peroxide to water contained in the hydrogen peroxide solution may be 1: 1 to 5, specifically 1:2.5 to 4. By satisfying this range, the light transmittance of 80% or more, preferably 85% or more, can be achieved in the range of 300 to 800 nm of the fluorescent epoxy transparent wood to be manufactured. When water is added in a larger amount than the appropriate range, transparency may decrease, and if water is added in a small amount, a decrease in tensile strength of transparent wood may occur due to damage to cellulose tissue, etc.

In the method for manufacturing a fluorescent epoxy transparent wood according to an embodiment of the present invention, the second step may be performed at 85 to 110° C. for 10 to 120 minutes, and within this range, the amount of lignin remaining with bleaching without damaging the cellulose tissue. It has the advantage of being removable.

The fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention may further include washing and drying the wood after the second step and before performing the third step. In this case, washing may be performed using distilled water, and the drying may be used without limitation if it is a method capable of removing distilled water after washing.

Fluorescent epoxy transparent wood manufacturing method according to the present invention is a third step of impregnating the treated wood with the hydrogen peroxide solution in an epoxy resin composition containing quantum dots; and a fourth step of curing the epoxy resin composition. By including the third and fourth steps, by filling the epoxy between the cellulose structures remaining in the wood, a fluorescent epoxy transparent wood with excellent visible light transmittance can be prepared, and by impregnating an epoxy resin composition containing quantum dots, There is an advantage in that the manufactured epoxy transparent wood can emit light of a specific wavelength, and as a result, the manufactured transparent wood can be used as an optical material.

Normal wood has a characteristic of emitting light of a specific wavelength when irradiated with light, particularly ultraviolet light, even when only lignin is removed through the first and second steps, and furthermore, it is transparent by mixing quantum dots with the epoxy resin composition. By manufacturing wood, there is an advantage in that it is possible to manufacture a transparent wood that emits light of a desired wavelength.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the quantum dots can be used without limitation if they are nanoparticles for emitting light of a specific wavelength in a conventional sense, and specifically, the quantum dots have a particle size of 10 It may be less than or equal to nm, more specifically 1 to 8 nm, but the present invention is not limited thereto. In a specific and non-limiting example, the quantum dots include graphene, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeZnS, ZnSTe, HgSeS, HgSTe, CdSeTe, HgSTe, , CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeT AlP, GaN GaN GaN GaN GaN AlP, HgN GaN InAs, GaNP, GaNAs, GaPAs, AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, InAlPAs, MoS ₂ , WS ₂ , MoSe ₂ , MoTe ₂ , TaSe ₂ , NbSe ₂ , NiTe ₂ , BN, Bi ₂ Te ₃ and these may be one or two or more selected from quantum dots stacked in a core-shell form, or mixed with one or more two-dimensional materials, and the present invention is limited thereto no.

At this time, the quantum dots may be included in 0.5 to 3 parts by weight relative to 100 parts by weight of the handmade epoxy composition. When a large amount of this is included, there is a problem that may cause a decrease in tensile strength and the like.

The weight ratio of wood: epoxy resin included in the transparent wood finally manufactured in the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention may be 1:3 to 8, specifically 1:4 to 7, and If the content is too low, the cellulose structure may not be sufficiently filled, which may cause a problem that the mechanical strength is weakened.

In this case, the epoxy resin composition used can be used without limitation if it is a commonly used epoxy resin composition, and it is obvious that it may vary depending on the place of use of the manufactured transparent wood.

Furthermore, the epoxy resin composition may be prepared by mixing a commonly used two-component type main agent and a curing agent, and after mixing the main agent and the curing agent, the epoxy resin is prepared by impregnating the remaining wood with the cellulose structure before curing proceeds. can be manufactured.

At this time, the subject matter is bisphenol A type epoxy resin, bisphenol A type novolac epoxy resin, phenol novolac epoxy resin, tetrafunctional epoxy resin, biphenyl type epoxy resin, triphenol methane type epoxy resin, alkyl modified triphenol methane epoxy resin, It may include one or two or more selected from naphthalene-type epoxy resins, dicyclopentadiene-type epoxy resins, cresol novolac epoxy resins, dicyclopentadiene-modified phenol-type epoxy resins, and urethane-modified epoxy resins, preferably bisphenol A It may include one or more epoxy resins selected from a type epoxy resin and a bisphenol A type novolac epoxy resin, but the present invention is not limited thereto. In addition, the curing agent may include one or two or more selected from an amine-based, anhydride-based curing agent, preferably an amine-based curing agent, as a specific example, the amine-based curing agent is polyethyleneimine, diethylenetriamine One or two or more selected from (diethylenetriamine), triethylenetetramine, tetraethylenepentamine, propylenediamine, and diethylaminopropylamine may be used, but the present invention However, the present invention is not limited thereto. In this case, the curing agent may be included in an amount of 10 to 20 parts by weight based on 100 parts by weight of the epoxy resin, but may vary depending on the epoxy equivalent of the epoxy resin. When a small amount of the curing agent is included, an uncured epoxy resin may occur, and when a large amount of the curing agent is included, it may cause a decrease in base strength.

More preferably, the epoxy resin included in the epoxy resin composition according to an embodiment of the present invention has an epoxy equivalent of 180 to 200 g/eq, and a viscosity of 11000 to 13500 cps at 25° C. can be used, and more preferably, an epoxy equivalent It is 185-195 g/eq, and 25 degreeC quasi-viscosity 12000-13000 cps can be used. When an epoxy resin composition satisfying this range is used, the tensile strength of the fluorescent epoxy transparent wood produced may be 17 MPa or more, specifically 20 MPa or more, and more specifically 22 to 30 MPa. Furthermore, the fluorescent epoxy transparent wood according to an embodiment of the present invention may have a flexural strength of 35 to 45 MPa while satisfying the above-described tensile strength range, which is a mechanical transparent epoxy wood material while exhibiting flexibility of a certain level or more. It can mean that no significant drop in strength is caused.

When using an epoxy resin with a low epoxy equivalent or viscosity, it is difficult to exhibit mechanical properties such as sufficient hardness, and when an epoxy resin with a high epoxy equivalent or viscosity is used, it is difficult to uniformly distribute the epoxy resin in the cellulose structure, or the viscosity Addition of an excessive amount of solvent for control may cause a problem in that the curing time is significantly delayed.

In the case where the epoxy resin composition is prepared by mixing a two-component main agent and a curing agent in the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the subject may further include a solvent for viscosity control in addition to the epoxy resin. can In this case, the solvent is not limited in the case of an organic solvent capable of reducing the viscosity of the epoxy resin composition, but preferably acetone or the like may be used. Specifically, the epoxy resin composition may contain 20 to 50 parts by weight of a solvent relative to 100 parts by weight of the epoxy resin, and when the solvent is too little, it is difficult to uniformly fill the cellulose structure with the epoxy resin, and when the solvent is too much, the curing time This delay can cause problems.

When the epoxy resin composition is prepared by mixing a two-component main agent and a curing agent in the method for manufacturing a fluorescent epoxy transparent wood according to an embodiment of the present invention, the curing agent may further include a curing accelerator. The curing accelerator may be used without limitation those used in the art, but preferably tertiary amines such as benzyldimethylamine, triethanolamine, triethylenediamine, dimethylaminoethanol, tri(dimethylaminomethyl)phenol, 2-methyl imidazoles such as midazole and 2-phenylimidazole, triphenylphosphine, a coordination compound of triphenylphosphine and parabenzophenone, organophosphines such as diphenylphosphine and phenylphosphine, tetraphenylphosphonium One or two or more selected from tetraphenylboron salts such as tetraphenylborate and triphenylphosphine tetraphenylborate may be used, but the present invention is not limited thereto. At this time, the added curing accelerator may vary depending on the type of curing accelerator and the desired curing time, but preferably 0.1 to 1 part by weight relative to 100 parts by weight of the epoxy resin may be included, and in this range, it accelerates curing and at the same time excessively rapid curing. It is possible to prevent the problem that the epoxy resin is not uniformly distributed in the cellulose structure due to curing.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the weight ratio of wood: epoxy resin in the fluorescent epoxy transparent wood may be 1:3 to 7, more specifically 1:4 to 6, and a small amount of the epoxy resin When added, the epoxy resin composition is not sufficiently filled between the cellulose structures, which may cause a decrease in mechanical strength and transparency.

In the fluorescent epoxy transparent wood manufacturing method according to an embodiment of the present invention, the fluorescent epoxy transparent wood has an excellent elastic tensile strain compared to the case where the epoxy resin is cured by the cellulose structure as described above, and specifically, the one of the present invention The fluorescent epoxy transparent wood manufactured by the fluorescent epoxy transparent wood manufacturing method according to the embodiment may have a tensile strain of 0.14% or more.

In the method for manufacturing a fluorescent epoxy transparent wood according to an embodiment of the present invention, the wood can be used without limitation in the case of commonly referred to as wood, but preferably balsa wood (Ochroma pyramidale) can be used, and balsa wood can be used. Fluorescent epoxy transparent wood produced has the advantage that it can be applied to various fields because it is light in weight while exhibiting physical properties such as high tensile strength.

The present invention also provides a fluorescent epoxy transparent wood, and the fluorescent epoxy transparent wood according to the present invention may be manufactured by the manufacturing method according to an embodiment of the present invention. The manufactured fluorescent epoxy transparent wood has mechanical strength such as excellent light transmittance and tensile strength, and has the advantage of being able to replace glass in various fields.

Hereinafter, the present invention will be specifically described by way of Examples and Comparative Examples. The examples below are only for helping understanding of the present invention, and the scope of the present invention is not limited by the examples below.

[Production Example 1]

1. Removal of lignin

A piece of Balsa wood having a width × length × thickness of 3 cm × 7 cm × 0.5 cm was prepared and dried in an oven at 80° C. for 24 hours. The dried pieces of Balsa wood _{were immersed in a boiling aqueous solution containing NaOH (2.5} mol/L) and Na 2 SO ₃ (0.4 mol/L), left for 36 hours, and washed three times with distilled water. After that, the wood is impregnated in a boiling solution having a ratio of hydrogen peroxide: distilled water of 1:3 for 1 hour, washed with cold water, washed with ethanol three times, and dried to remove the lignin and the cellulose structure is left. , the weight was measured.

2. Add Epoxy Resin

A subject was prepared by mixing 100 g of liquid bisphenol A having an epoxy equivalent weight of about 190 g / eq and a viscosity of about 12500 cps at 25 ° C, 30 g of an acetone solvent, and 0.8 g of an acetone colloidal solution in which quantum dots of graphene quantum dots are dispersed. . At this time, in acetone in which quantum dots are dispersed, graphene quantum dots have an average particle diameter of 3.4 nm, and 5 mg per ml of acetone dispersed was used.

Separately, a curing agent was prepared by mixing 15 g of tetraethylenepentamine as a curing agent and 0.5 g of benzyldimethylamine as a curing accelerator. It was cured by leaving it at room temperature for 24 hours. It was confirmed that the weight ratio of the wood with the cellulose structure remaining after curing: the added epoxy resin composition was 1:5.

The transparent wood prepared in Preparation Example 1 was observed by SEM, and the result is shown in FIG. 2 , and referring to FIG. 2 , it can be confirmed that the epoxy resin is filled between the cellulose structures.

[Production Example 2]

It was prepared in the same manner as in Preparation Example 1, but in the lignin removal step, a ratio of hydrogen peroxide: distilled water was mixed at 1:3.5 to impregnate the wood, and then a transparent wood was prepared.

[Production Example 3]

It was prepared in the same manner as in Preparation Example 1, but in the lignin removal step, a ratio of hydrogen peroxide: distilled water was mixed at 1:1 to impregnate the wood, and then a transparent wood was prepared.

[Production Example 4]

It was prepared in the same manner as in Preparation Example 1, but the ratio of hydrogen peroxide: distilled water was mixed at 1:5 to impregnate the wood, and then a transparent wood was prepared.

[Production Example 5]

It was prepared in the same manner as in Preparation Example 1, but the epoxy resin had an epoxy equivalent of about 182 g/eq and a viscosity based on 25° C. of about 9000 cps to prepare a transparent wood.

[Production Example 6]

It was prepared in the same manner as in Preparation Example 1, but the epoxy resin had an epoxy equivalent of about 200 g/eq and a viscosity based on 25° C. of about 18000 cps to prepare a transparent wood.

[Production Example 7]

It was prepared in the same manner as in Preparation Example 1, but an epoxy resin was added so that the weight ratio of the wood with the cellulose structure remaining after curing: the added epoxy resin composition was 1:2.5.

[Production Example 8]

It was prepared in the same manner as in Preparation Example 1, but an epoxy resin was added so that the weight ratio of the wood with the cellulose structure remaining after curing: the added epoxy resin composition was 1:8.

[Production Example 9]

It was prepared in the same manner as in Preparation Example 1, but an epoxy resin composition was prepared by adding 6 g of a colloidal solution of acetone in which graphene quantum dots were dispersed, and a transparent wood was prepared using this.

Light emission confirmation of manufactured transparent wood

A transparent wood was prepared in the same manner as in Preparation Example 1, but using liquid bisphenol A without mixing quantum dots, which is shown in FIGS. 3 and 4 . Figure 3 shows the wood without any treatment (left) and the manufactured transparent wood (right), it can be confirmed that the wood that transmits visible light is manufactured, Figure 4 shows that the transparent wood is irradiated with ultraviolet rays, When irradiated, it can be seen that blue light is emitted.

FIG. 5 shows that the transparent wood prepared in Preparation Example 1 is irradiated with ultraviolet light and observed. By irradiating quantum dots, it can be confirmed that the transparent wood is irradiated with yellow light instead of blue light.

Measurement of Tensile Strength of Manufactured Transparent Wood

The tensile strength of the transparent wood and dried balsa wood prepared in Preparation Example was measured, respectively, and the results are shown in Table 1.

Transparency measurement of manufactured transparent wood

The average light transmittance was measured by UV-vis in the wavelength range of 300 to 800 nm of the transparent wood prepared in Preparation Example, and the results are shown in Table 1.

Tensile strength (MPa) Tensile strain (%) Light transmittance (%) Preparation Example 1 24.2 0.15 87 Preparation 2 23.0 0.14 84 Preparation 3 21.2 0.11 85 Preparation 4 20.3 0.12 65 Preparation 5 18.9 0.11 80 Preparation 6 15.9 0.12 76 Preparation 7 17.4 0.06 74 Preparation 8 21.7 0.10 84 Preparation 9 19.5 0.12 85 balsa wood 16.0 0.002 -

Referring to Table 1, it can be seen that the transparent wood prepared in Preparation Examples 1 and 2 has excellent tensile strength and light transmittance. In the case of Preparation Example 3, in which hydrogen peroxide: water was added in a ratio of 1:1, it can be confirmed that a decrease in tensile strength occurs due to partial damage to the cellulose structure. It can be seen that a decrease in In the case of Preparation Example 5 using an epoxy having a low viscosity and epoxy equivalent, it can be seen that the tensile strength is somewhat lowered, and in the case of Preparation Example 6 using an epoxy having a high viscosity and epoxy equivalent, a significant decrease in tensile strength and light transmittance occurs, This is considered to be a result of not uniformly distributing the epoxy resin between the cellulose structures. Preparation Example 7 It can also be seen that the addition of a small amount of epoxy causes a decrease in tensile strength and light transmittance as in Preparation Example 6, and in the case of the transparent wood prepared in Preparation Example 8, the tensile strength and light transmittance are good, but It was confirmed that the elasticity of the transparent wood hardly appeared, and there was little difference in physical properties compared to the case of curing the epoxy resin without the cellulose structure.

Confirmation of flexural strength of manufactured transparent wood

The specimen prepared in Preparation Example 1 and prepared in the same manner as in Preparation Example 1, but without mixing the cellulose structure and quantum dots, and by curing only the epoxy resin, respectively, measured the flexural strength of the epoxy specimen, and the results are shown in Table 2 indicated.

The measured specimen was measured with a universal testing machine using a specimen having a length of 100 mm, a width of 10 mm, and a thickness of 3 mm.

Preparation Example 1 Epoxy specimen Flexural strength (MPa) 43 59

Referring to the results in Table 2, it can be seen that the flexural strength of the fluorescent epoxy transparent wood evacuated from the epoxy specimen is low, and through this, it can be confirmed that the flexibility of the fluorescent epoxy transparent wood is improved compared to the specimen prepared only with epoxy.

Claims (11)

A first step of treating the wood with a treatment solution containing a base and a sulfite;
a second step of treating the treated wood with the treatment solution with hydrogen peroxide;
a third step of impregnating the wood treated with the hydrogen peroxide solution into an epoxy resin composition containing quantum dots; and
Including; a fourth step of curing the epoxy resin composition;
The hydrogen peroxide solution has a weight ratio of hydrogen peroxide: water 1: 2.5 to 4,
The epoxy resin has an epoxy equivalent of 185 to 195 g/eq, and a viscosity at 25° C. of 12000 to 13000 cps,
The wood: the weight ratio of the epoxy resin is 1: 4 to 7,
Fluorescent epoxy transparent wood manufacturing method, characterized in that the light transmittance is 85% or more in the wavelength range of 300 to 800 nm. delete delete The method of claim 1,
The molar ratio of the sulfite to the base is 1:3 to 10. A method for producing a fluorescent epoxy transparent wood. The method of claim 1,
The second step is a fluorescent epoxy transparent wood manufacturing method that is performed for 10 to 120 minutes. delete The method of claim 1,
The transparent epoxy wood is a fluorescent epoxy transparent wood manufacturing method, characterized in that the tensile strength of 17 MPa or more. The method of claim 1,
The quantum dots are graphene, CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, HgS, HgSe, HgTe, CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdSe, HgSTe, CdSe CdHgSe, CdHgTe, HgZnS, HgZnSe, HggZnTe, CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, HgZnSTe GaN, GaP, InsAs, GaN, In GaP, InsAs, GaN, In GaP, InsAs, GaN, GaP, InsAs, , AlNP, AlNAs, AlPAs, InNP, InNAs, InPAs, GaAlNP, GaAlNAs, GaAlPAs, GaInNP, GaInNAs, GaInPAs, InAlNP, InAlNAs, InAlPAs, MoS ₂ , WS ₂ , MoSe ₂ , MoTe ₂ , TaSe ₂ , NbSe _{2 2} , BN, Bi ₂ Te ₃ and one or more fluorescent epoxy transparent wood manufacturing method selected from quantum dots in which they are laminated in a core-shell form or in which one or more two-dimensional materials are mixed. The method of claim 1,
The epoxy resin composition is bisphenol A type epoxy resin, bisphenol A type novolac epoxy resin, phenol novolac epoxy resin, tetrafunctional epoxy resin, biphenyl type epoxy resin, triphenol methane type epoxy resin, alkyl modified triphenol methane epoxy Fluorescent epoxy transparent wood containing one or two or more selected from resin, naphthalene-type epoxy resin, dicyclopentadiene-type epoxy resin, cresol novolac epoxy resin, dicyclopentadiene-modified phenol-type epoxy resin, and urethane-modified epoxy resin Way. delete A fluorescent epoxy transparent wood manufactured by the manufacturing method of claim 1.

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